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Articles on Small & Household Size Wind Turbines

Small wind turbines encompass a broad range of wind turbines from micro turbines, to mini turbines, to household-size turbines. Wind turbines in these size classes may have power ratings from a few watts to dozens of kW. Internationally, this category includes wind turbines up to 15 meters (49 feet) in diameter. Wind turbines of this size may have power ratings from 50 to 100 kW.

While ducted or shrouded wind turbines and Vertical Axis Wind Turbines can be of any size, they are listed here because they are outside the mainstream of the commercial wind industry.

VAWT Wind turbines are tourist ‘must-see’

June 14, 2018,   by Chen Kuan-pei and Sherry Hsiao

A wind farm comprised of 432 vertical-axis wind turbines on the coast of Changhua County’s Fangyuan Township (芳苑) has become the county’s latest tourist attraction. The turbines look like egg...

Category: Small Vertical Axis Wind Turbines

Presentation on Improvements to Small Wind Turbines

April 14, 2018,   by Paul Gipe

Presentation for CORE Energy Summit in Winnipeg, Manitoba 12 April 2018.

Category: Small Wind folder, Presentations by Paul Gipe

Bluenergy Giving Me the Blues

April 11, 2018,   by Paul Gipe

What's up with Canada? I've gotten two enquiries from the Great White North about Bluenergy Solarwind, a US company claiming to have developed another vertical-axis wind turbine (VAWT).[more]

Category: Small Vertical Axis Wind Turbines

Transfer of Distribution Rights for Gipe's Wind Energy for the Rest of Us Completed

April 7, 2018,   by Paul Gipe

4 April the transfer of remaining copies of Wind Energy for the Rest of Us to a new distributor was completed.[more]

Category: Book Wind Energy for the Rest of Us, News on Wind Energy, News on Large Wind, Small Wind folder

Update: Wind turbine entrepreneur, wanted by the FBI, found hiding in Saskatoon

March 30, 2018,   by Thia James

Celebrities like former Tonight Show host Jay Leno and actor Ed Begley Jr. endorsed the Canadian entrepreneur's product. Rowan was making national headlines with his invention. But skeptics wondered...

Category: Mag-Wind

Liquidation Of Gaia-Wind Stems From Government Inaction On Small-Scale Renewables

March 19, 2018,   by Joshua S Hill

One of the UK’s best-known and most iconic small-scale wind companies, Gaia-Wind, has been forced into provisional liquidation and the company and outside observers are highlighting government...

Category: Small Wind folder

Trade bodies slam Westminster for ‘inaction’ in saving Scottish renewables firm

March 14, 2018,   by Kirsteen Paterson

Yesterday trade organisation RenewableUK added its voice, calling government decision-making a “key factor” in the fall of one of the sector’s “best-known and most iconic companies”. The Feed-In...

Category: Small Wind folder

Gaia Wind: Scottish wind-turbine maker collapses amid 'Westminster cuts' to renewables

March 13, 2018,   by Kirsteen Paterson

Gaia-Wind, which celebrated the roll-out of its 1000th device from Glasgow last April, has appointed a provisional liquidator. The company moved its operations to Scotland from Denmark seven years...

Category: Small Wind folder

Sex Sells--Even Wind Energy: The Dalhart Mystery

March 8, 2018,   by Paul Gipe

Sex sells. Always has, always will. Sex has been used to sell beer, cars, and even wind energy--well, at least articles about wind energy.[more]

Category: Small Vertical Axis Wind Turbines, History of Wind Power

CGE Energy Touting Its Uncertified Darrieus Wind Turbine

February 28, 2018,   by Paul Gipe

CGE Energy recently issued a press release applauding the US Congress for extending tax subsidies to small wind turbines. The press release also touts CGE's Darrieus wind turbine, the Wind-e 20.[more]

Category: Small Vertical Axis Wind Turbines

Performance of Swiss Darrieus Wind Turbine Alpha Real Mirrors that in California of the 1980s

February 8, 2018,   by Paul Gipe

The 1992 report on the project by the Centre de Recherche Energétiques et Municpales reads like so many of the others from the period. In short, the four-year project was a failure for a host of...[more]

Category: Small Vertical Axis Wind Turbines, History of Wind Power

French Post Card and CENG's Darrieus Turbine

February 8, 2018,   by Paul Gipe

Wind historian extraordinaire Etienne Rogier sent me a carte postale (post card) promoting a 1988 French postage stamp. The card depicts the postage stamp and an experimental Darrieus turbine.[more]

Category: Small Vertical Axis Wind Turbines, History of Wind Power

UGE: Wind turbine blades falling off Addison’s water tower result in $1 million flop, crazy lawsuit

February 2, 2018,   by Dave Lieber

The turbines ran for three months before one blade fell to the ground 190 feet below. Then a second blade crashed through a nearby storage building's roof, falling into a conference room. No one was...

Category: Small Vertical Axis Wind Turbines, Urban Green Energy (UGE)

Video of SheerWind-Invelox in Iran

January 30, 2018,  

Daryoush Allaei extolling the wonders of his device in his native land. Note the location of the device--down below the ridge on which they are standing. Also notice that there are some real wind...

Category: Sheerwind-Invelox

The Nature Conservancy Clams Up on Ducted Turbine Debacle--Who Will Pay to remove it?

January 13, 2018,   by Paul Gipe

The Nature Conservancy (TNC), one of the nation's premier land preservation trusts, isn't talking about its failed investment in a ducted wind turbine debacle 1,000 miles from Hawaii.[more]

Category: Sheerwind-Invelox

FaceBook Comments on SheerWind Ducted Disaster

January 10, 2018,   by Paul Gipe

The following are comments to Another Ducted Device Dead: SheerWind-Invelox Bankrupt. They were so insightful I decided to repost them here where they are more easily archived.[more]

Category: Sheerwind-Invelox

Another Ducted Device Dead: SheerWind-Invelox Bankrupt

January 9, 2018,   by Paul Gipe

My inbox saw a flurry of emails 4 January 2018 to inform me that ducted turbine darling SheerWind-Invelox was bankrupt. While the event wasn't much of a surprise, it did take much longer than I'd...[more]

Category: Sheerwind-Invelox

Abandoned DAF-Indal Darrieus Turbine on the Iles-de-la-Madeleine

December 1, 2017,   by Paul Gipe

Someone sent me a link to a YouTube video titled Abandoned Vertical Axis Windmill In The Magdalen Islands.[more]

Category: Small Vertical Axis Wind Turbines, History of Wind Power

You can’t buy this turbine, but you can buy its power

October 20, 2017,   by Paul Dvorak

Even though the blades appear curved, each is made of 11 sections with hinged connections. The rotor will be limited to about 80 rpm by using several aviation-style airbrakes in the center sections...

Category: Small Vertical Axis Wind Turbines

The Curse That Keeps on Giving: Honeywell WindTronics Redux

October 12, 2017,   by Paul Gipe

I pay a price for debunking various wind turbine flim-flams and posting critiques on my web site. Consequently, I am cursed to be listed by Google and Indian call centers as the person to call if a...[more]

Category: Windtronics

Adecon Darrieus Turbine Photos Posted

October 7, 2017,   by Paul Gipe

In response to a query from a Swedish researcher, I’ve posted eight historic photos of the Adecon Darrieus wind turbine to my web site. See Adecon under Vertical Axis Wind Turbines (VAWTs) in the...[more]

Category: Small Vertical Axis Wind Turbines

Another Small VAWT with Big Ambitions Bankrupt: X-Wind Power

October 5, 2017,   by Paul Gipe

Small Vertical-Axis Wind Turbines (VAWTs) come and go so fast no one can keep track of them before they become history.[more]

Category: Small Vertical Axis Wind Turbines

VAWTs Relegated to the Backwaters of the Internet Where Anti-Vaxxers Roam

August 23, 2017,   by Paul Gipe

I’d seen a reference to the technical paper, Optimization of a vertical axis wind turbine for application in an urban/suburban area, by two academics making the rounds but didn’t take much notice of...[more]

Category: Small Vertical Axis Wind Turbines, Rooftop & Urban Wind

Betz: Everything You Need to Know about Wind Turbines Was Written in 1927

July 21, 2017,   by Paul Gipe

Yes, I’ve written about this subject once before, Everything You Need to Know about Wind Energy Was Written in 1957!, but I am moving the date back thirty years in the light of more research. The...[more]

Category: Book Wind Energy for the Rest of Us, History of Wind Power, Small Wind folder, News on Wind Energy, News on Large Wind

Darrieus and His Vertical-Axis Wind Turbines (VAWTs)

July 20, 2017,   by Paul Gipe

Largely forgotten today, Georges Jean Marie Darrieus was one of France’s great engineers. While he is mostly known in the English-speaking world for his patent on vertical-axis wind turbines (VAWTs),...[more]

Category: Book Wind Energy for the Rest of Us, Small Vertical Axis Wind Turbines, History of Wind Power

Photos of Dabiri VAWT Test Site—Wing Power Turbines are Down

July 10, 2017,   by Paul Gipe

Oh the ways of the wind. It blows where it will--or something to that effect. We were on our way to pick cherries. That’s a fairly innocuous activity. From Bakersfield we had to cross the Antelope...[more]

Category: Small Vertical Axis Wind Turbines

SheerWind Invelox Demo Turbine in Need of Demolition

July 10, 2017,   by Paul Gipe

The Chaska, Minnesota promoter of a ducted wind turbine appears to have fallen on hard times. The fabric covering of the intake duct for their demonstration turbine is torn and in disrepair and the...[more]

Category: Sheerwind-Invelox

Wind Day in Woodstock, Ontario

July 10, 2017,   by Paul Gipe

York University’s International Renewable Energy Academy designated 29 June as the “wind day” on their week-long program. [more]

Category: News on Large Wind, News on Community Power, Small Wind folder

Professional-Grade Sound Level Meter for Sale

June 12, 2017,  

I have a Casella CEL-464 professional-grade sound level meter for sale. I used the unit during the early 2000s to measure the noise emissions from small wind turbines.[more]

Category: Small Turbine Testing, Wind Energy & the Environment

Finally a New Generation of VAWT Busters Has Arrived: Debunking IceWind

June 7, 2017,   by Paul Gipe

The onslaught of super-dooper new windmill inventions is never ending. Frankly it’s wearing out us old timers. We can’t keep up with the damn things. We try to ignore them but our friends and...[more]

Category: Rooftop & Urban Wind, Small Vertical Axis Wind Turbines

What went wrong with that weird wind turbine on Deer Island?

May 5, 2017,   by Scott Kirsner

Ogin raised more than $150 million in funding — even attracting the attention of former Vice President Al Gore, now a senior partner at Kleiner Perkins Caufield Byers, one of the company’s earliest...

Category: FloDesign-Ogin FloDesign-Ogin

Mag-Wind’s James Rowan Captured in Saskatoon after Four Years on the Lam

May 4, 2017,   by Paul Gipe

Four years after a federal grand jury in Raleigh, North Carolina returned a two-count indictment against James Alan Rowan for his fraudulent wind turbine investments, the fugitive was caught in...[more]

Category: Mag-Wind, Small Vertical Axis Wind Turbines

FloDesign’s State Subsidy Up in Smoke

May 4, 2017,   by Paul Gipe

Among all those who lost money in the FloDesign-Ogin fiasco is the Commonwealth of Massachusetts. Compared to others the state lost a relatively modest amount of $3 million.[more]

Category: FloDesign-Ogin FloDesign-Ogin

Assessing wind resources in our cities

May 3, 2017,   by Michael Allen

Urban environments are challenging locations for small wind turbines. Moreover, the sector must deal with cases of small turbines poorly sited and installed by companies that are more interested in...

Category: Small Wind folder, Rooftop & Urban Wind

Noise, eigenfrequencies and turbulence behavior of a 200 kW H-rotor vertical axis wind turbine

May 2, 2017,   by Erik Möllerström

The work within this thesis is made in collaboration between Halmstad University and Uppsala University. A 200-kW semi-guy-wired VAWT H-rotor, owned by Uppsala University but situated in Falkenberg...

Category: Small Vertical Axis Wind Turbines

Ontario man facing extradition to U.S. on fraud charges found at parents' home in Saskatoon

April 29, 2017,   by Thia James

James Alan Rowan was apprehended in Saskatoon, where his parents live. A Saskatoon judge committed him to be extradited to the U.S. to face two fraud charges filed against him amid allegations he...

Category: Mag-Wind

Kiwi Pension Fund Loses $50 Million in Ogin Ducted Turbine Fiasco

April 21, 2017,   by Paul Gipe

New Zealand’s Superannuation Fund has written down its $47.5 million (NZ) investment in ducted turbine promoter Ogin. [more]

Category: FloDesign-Ogin FloDesign-Ogin

NZ Super Fund writes down wind turbine investment; remains committed to investing in early stage companies

April 21, 2017,  

In June 2016 the Ogin Board of Directors and management mutually agreed to separate. At that point we wrote the Fund’s NZ$47.5 million investment down to nil, and that was included in our annual...

Category: FloDesign-Ogin FloDesign-Ogin

The Long & Winding Road to Today's Small Wind Industry

April 19, 2017,   by Paul Gipe

Keynote presentation to the 2017 Small Wind Conference 11 April in Minneapolis, Minnesota.[more]

Category: Presentations by Paul Gipe, Small Wind folder

New ‘Excel 15’ small-wind turbine generates more energy at a lower LCOE

April 12, 2017,   by Michelle Froese

Bergey Windpower, an American manufacturer of small wind turbines for residential and commercial applications, recently announced a new product, the Excel 15 wind turbine.

Category: News on Small Wind

Small Wind Conference Chooses Gipe for Keynote Speaker

March 10, 2017,  

The Small Wind Conference has chosen Paul Gipe as its keynote speaker for its 2017 conference in Minneapolis, Minnesota. Calling Gipe “legendary” for his four decades writing about wind energy, the...[more]

Category: book Reviews, Book Wind Energy for the Rest of Us, Small Wind folder

SheerWind-Invelox--Is the End Nigh for Another Ducted Turbine?

February 23, 2017,   by Paul Gipe

Is the end near for SheerWind’s Invelox ducted wind turbine? The problems with SheerWind’s design are coming to a head as its signature clients lose faith.[more]

Category: Sheerwind-Invelox, Inventions & Questionable Wind Turbines

Clarkson Attempts Ducted Turbines—Again

January 20, 2017,   by Paul Gipe

Despite its previous association with a questionable wind turbine and its promoter, Clarkson University announced that the school in upstate New York has transferred ducted wind turbine technology...[more]

Category: Shrouded & Ducted Wind Turbines, Windtamer

TAM Energy Still Spinning WindTronics Hype--Will This Thing Ever Die?

January 9, 2017,   by Paul Gipe

Honeywell WindTronics may be dead but that doesn’t stop others from spinning the WindTronics hype. [more]

Category: Windtronics

WindTronics Took Millions from Ontario Then Unconvincingly Blames the Province

January 9, 2017,   by Paul Gipe

“The province gave the company $2.7 million to open in Windsor — under one condition. The company promised there would be 200 workers in the plant by the end of this year. That is now very unlikely,”...[more]

Category: Windtronics

Endurance Wind Power bankruptcy spreads to UK

December 9, 2016,   by Nelson Bennett

Endurance Wind Power filed for bankruptcy sometime around early November and placed under trust with Grant Thonrton, after its bank called in its loan.

Category: Small Wind folder

UGE's VAWT wind turbines generating regret; $100,000 turbines to create $1.50 in electricity monthly

December 4, 2016,   by Paul Gottlieb

The $107,516 spires stand immobile more than two months after they were erected and more than a year after the city council approved them.

Category: Small Vertical Axis Wind Turbines

Swedish IPO to support vertical axis floating wind tech

November 28, 2016,   by Tsvetomira Tsanova

SeaTwirl has already installed a 30-kW prototype floating offshore wind turbine at Lysekil and it wants to build a full-scale machine, SeaTwirl S2, by 2020.

Category: Small Vertical Axis Wind Turbines

FloDesign Ogin Ducted Wind Turbine at Deer Island Coming Down

November 14, 2016,   by Paul Gipe

FloDesign’s prototype ducted wind turbine on Deer Island in Boston Harbor is being removed, according the agency that operates the nearby sewage treatment plant.[more]

Category: FloDesign-Ogin, Inventions & Questionable Wind Turbines FloDesign-Ogin

Rooftop and Building Integrated Wind Turbines are a Failure Says NREL

September 30, 2016,   by Paul Gipe

The National Renewable Energy Laboratory (NREL) concludes in a new report that rooftop-mounted and building-integrated wind turbines are a failure, though readers would be hard pressed to find that...[more]

Category: Rooftop & Urban Wind, Inventions & Questionable Wind Turbines, Small Vertical Axis Wind Turbines, Urban Green Energy (UGE)

Cleanfield Energy: Another Story of VAWT Hubris & Hustle

September 29, 2016,   by Paul Gipe

Cleanfield made a big media splash in Ontario, Canada during the mid-2000s with its claim of producing a new wind turbine suited for mounting on buildings. [more]

Category: Cleanfield, Rooftop & Urban Wind

Cleanfield Cited by Ontario Centres of Excellence as a “Success” Story

September 28, 2016,   by Paul Gipe

There’s no better example of ignorance, hype, and hubris by people with more money at their disposal than their knowledge of energy when the government of Ontario funded Cleanfield Energy, a small...[more]

Category: Cleanfield

A giant egg beater at ILCC’s farm?

September 25, 2016,   by LARRY KERSHNER

Vertical axis wind turbine design to be tested soon

Category: Small Vertical Axis Wind Turbines

Remember that “wind tree”? It’s worse than we thought

August 30, 2016,   by Simon Mahan

Turns out, the wind tree is actually worse than initially thought.

Category: Small Wind folder, Inventions & Questionable Wind Turbines

Ogin Ducted Turbine Employees Speak Out

August 23, 2016,   by Paul Gipe

Former employees of the erstwhile ducted turbine manufacturer Ogin have posted comments about their jobs on a public web site.[more]

Category: FloDesign-Ogin, Inventions & Questionable Wind Turbines FloDesign-Ogin

Close-up Photos of Ogin DAWT Dismantlement in San Gorgonio Pass

August 22, 2016,   by Paul Gipe

More photos of the Ogin ducted wind turbine dismantlement have been “thrown over my transom.” These close-up photos show far more detail of the disassembly and scrapping process than before.[more]

Category: FloDesign-Ogin, Inventions & Questionable Wind Turbines FloDesign-Ogin

Wind Tourist Pic of Ropatec VAWT in Southern Sicily

August 19, 2016,   by Paul Gipe

French aerodynamicist Stéphan Aubin sent in a photo of Vertical-Axis Wind Turbine (VAWT) near the port of Siacca while he was vacationing in southern Italy.[more]

Category: Small Vertical Axis Wind Turbines

UGE Dumps VAWT Business—What Happens Now to Eiffel Tower & Lincoln Field Turbines?

August 4, 2016,   by Paul Gipe

Controversial developer of “urban” wind projects Urban Green Energy (UGE) is quitting the wind business. Using its in-house designed vertical-axis wind turbine, the New York City-based company...[more]

Category: Small Vertical Axis Wind Turbines, LEED, Urban Green Energy (UGE) LEED

Ogin Ducted Turbines Removed Near Palm Springs (Updated with Photos)

August 1, 2016,  

The highly hyped ducted wind turbines near Palm Springs have been removed. The Ogin turbines were removed sometime this summer.[more]

Category: FloDesign-Ogin FloDesign-Ogin

Small & Distributed Wind Capacity in Britain & USA

July 23, 2016,   by Paul Gipe

Britain, with one-fifth the population of the USA, installed 560 MW of wind generating capacity in distributed applications from 2010 through 2015. This represents more than three times the MW per...[more]

Category: News on Small Wind

Small Wind Tariffs in Denmark 2016

July 22, 2016,   by Paul Gipe

After a long delay, Denmark is poised to reintroduce a new Feed-in Tariff (FIT) program for small wind turbines. The previous program had been suspended when it reached its cap. The new program cuts...[more]

Category: Feed-in Tariffs for Small Wind

Georgia Power Small Wind Demo Raises Questions

June 30, 2016,   by Paul Gipe

Later this year Georgia Power Company, a part of the Southern Company, is installing three small wind turbines as a demonstration. Is this newsworthy? Is it significant in any way?[more]

Category: Small Wind folder

Windtamer Ducted Wind Turbine Finally and Officially Kaput

June 24, 2016,   by Paul Gipe

It went by various incarnations, but it was founded as Windtamer by one Gerald Brock and it finally and officially is gone.[more]

Category: Windtamer

The Brock Environmental Center: A Pinnacle of Sustainability—and Resilience

June 17, 2016,  

This is the way to do small wind right. "When Hurricane Joaquin affected the East Coast the first week of October 2015, the two wind turbines, which were selected for their ability to withstand...

Category: Rooftop & Urban Wind

Quiet Revolution VAWT Total Flop Says German Paper

June 8, 2016,   by Paul Gipe

That this turbine was doomed to fail—and would give small wind another—and unneeded—black eye was obvious from the beginning—for anyone who had the desire to know.[more]

Category: Small Vertical Axis Wind Turbines, Rooftop & Urban Wind

Test Summary Report on Solid Wind 25 kW Turbine

June 5, 2016,   by Paul Gipe

Sven Ruin brought to my attention the test summary report on Solid Wind's 14-meter diameter, 25 kW wind turbine. The report was issued in mid-2015.[more]

Category: Small Turbine Testing

Wind Energy for the Rest of Us First Page Proofs

May 9, 2016,   by Paul Gipe

The good news is that with a smaller font size and tighter leading (the space between lines) than in my previous books, Holm has been able to substantially reduce the number of printed pages from...[more]

Category: Book Wind Energy for the Rest of Us, book Reviews, News on Large Wind, Small Wind folder

City wind turbine more show-horse than workhorse

April 23, 2016,   by Joel Banner Baird

Watch the little wind turbine at Burlington Electric Department and you’ll find, as often as not, its blades are stock-still.

Category: Small Wind folder

Assigned ISBNs to Wind Energy for the Rest of Us

March 25, 2016,   by Paul Gipe

Big step in the long road to publishing my new book: Wind Energy for the Rest of Us. Today I assigned the ISBN numbers to the digital and print version. Each version of the book has its own distinct...[more]

Category: Book Wind Energy for the Rest of Us, book Reviews, News on Large Wind, Small Wind folder

2015 Small Wind World Report

March 17, 2016,   by Stefan Gsänger and Jean-Daniel Pitteloud

The recorded small wind capacity installed worldwide has reached more than 830 MW as of the end of 2014. This is a growth of 10,9 % compared with 2013, when 749 MW registered. In 2012, 678 MW were...

Category: News on Small Wind

In 2015, solar photovoltaic (PV) systems in Italy generated 24,676 GWh of electricity, representing 9.1 per cent of Italy’s domestic electricity production and 7.8 per cent of the country’s overall consumption.

March 17, 2016,   by Christine and Sam Simonetta

We took a chance when we bought our Tesla, and it’s paying off because our power comes from the wind. Our residential sized turbine captures wind from Lake Superior in Upper Michigan and fuels our...

Category: Electric Vehicles, Small Wind folder

New Page Posted of Photos of Paul Gipe's Career in Renewable Energy

March 8, 2016,   by Paul Gipe

I've finally taken the time to post some pictures from my career in renewable energy and energy policy. Some date from 1976, possibly earlier. My memory of those days is fuzzy as they say.[more]

Category: News on Large Wind, Small Wind folder, News on Community Power, News on Wind Energy, Renewable Energy

Small Vindication: Renewable Devices Swift Ducted Rooftop Turbine Gone

February 18, 2016,   by Paul Gipe

I am writing this now to close the book on this sad little turbine and the whole “let’s put them on the roof” phenomenon. Stumbling across an obscure NREL field test report from long ago (see Power...[more]

Category: Shrouded & Ducted Wind Turbines, Inventions & Questionable Wind Turbines, Rooftop & Urban Wind, Small Wind folder, Renewable Devices Swift

Ogin Installs Ducted Turbines in the San Gorgonio Pass

January 27, 2016,   by Paul Gipe

Ogin, the Massachusetts-based ducted turbine company, has installed six of seven turbines in the San Gorgonio Pass near Palm Springs, California.[more]

Category: FloDesign-Ogin, Inventions & Questionable Wind Turbines, News on Large Wind FloDesign-Ogin

Wind Energy for the Rest of Us: A Comprehensive Guide to Wind Power and How to Use It

January 21, 2016,  

Wind Energy for the Rest of Us by Paul Gipe straddles two—or more—worlds. The book is about wind energy. It’s not just about small wind turbines. It’s not just about large wind turbines. It’s about...[more]

Category: Book Wind Energy for the Rest of Us, book Reviews, News on Large Wind, Small Wind folder

Scottish small wind co Gaia-Wind forecasts growth in Japan

January 18, 2016,   by Plamena Tisheva

Andringa said that Japan had the most attractive feed-in tariff (FiT) worldwide and that the company's local reselling partners were preparing to help deliver the shift from nuclear to renewable...

Category: Feed-in Tariffs for Small Wind

Vertical Axis Wind Turbine At ILCC Farm Lab

January 14, 2016,  

A prototypye vertical axis wind turbine is set to go into operations at the Iowa Lakes Community College Farm Laboratory. - See more at:...

Category: Small Vertical Axis Wind Turbines

WindStor VAWT: Another Sad Saga of Time & Money Wasted

January 4, 2016,   by Paul Gipe

In sum, another story of ill-advised “development” of a revolutionary Darrieus wind turbine with all the attendant hubris and hype. The sad saga cost the government of Quebec $350,000—money that...[more]

Category: Small Vertical Axis Wind Turbines, Inventions & Questionable Wind Turbines

DECC Feed-in Tariff load factor analysis Extract Solar & Wind

December 27, 2015,   by Paul Gipe

The capacity factor for solar PV was about 10% and that for small wind turbines about twice that of solar PV at about 20%.[more]

Category: Small Wind folder, Solar Tables & Charts, Great Britain

UK Government Tariff Review Hits Scotland Hard As Hydro Suffers

December 17, 2015,  

“Secondly caps to the number of turbines which can be built, hidden in the detail of the review, mean, for example, that just three 50-100kW machines and three 1,500kW machines can be deployed every...

Category: Great Britain, Feed-in Tariffs for Small Wind

Curse of Honeywell Windtronics Keeps on Giving

December 14, 2015,   by Paul Gipe

Let this be a warning to you skeptics, critics, and debunkers of new-fangled wind turbine flim flam. It will come home to haunt you. Are you listening Mick Sagrillo?[more]

Category: Windtronics

Small Wind Turbines in Denmark 2015

October 1, 2015,   by Paul Gipe

According to a recent presentation by Danish Small Wind Association there are 1,000 wind turbines less than 25 kW in capacity installed in Denmark, representing a total of 8.6 MW. Small wind turbines...[more]

Category: Small Wind folder, News on Small Wind

Technical Assessment of Small Wind Turbine Power Generation

September 9, 2015,  

This study assesses the feasibility and performance of micro-wind turbines installed at different hub heights at the Toronto and Region Conservation’s Living City Campus wind field test in Vaughan,...

Category: Small Turbine Testing

Photos of Mid-America Windmill Museum

August 6, 2015,   by Paul Gipe

Visiting Indiana in the summer of 2015, I drove up to Fort Wayne to see my friends John & Cindy Ewing and suggested we check out the museum. The museum has greatly expanded their collections since...

Category: Small Wind folder

British Wind supporters urge government to back small projects

July 29, 2015,   by Priyanka Shrestha

More than 3,000 people have signed a petition calling on the government to support small and medium-sized wind projects in the UK.

Category: News on Small Wind, Great Britain

FloDesign-Ogin Diffuser Augmented Turbine (DAWT) in the Wild

July 27, 2015,   by Paul Gipe

What the photos clearly show is that the prototype has abandoned the lobed mixer-ejector feature that was the hallmark of the design—and the justification for the hype that this turbine would be the...[more]

Category: FloDesign-Ogin, Inventions & Questionable Wind Turbines, News on Large Wind, News on Wind Energy FloDesign-Ogin

UGE Wind Turbines Fate Uncertain

April 16, 2015,   by Mike Harris

Costing about $400,000 to purchase and install, the four wind turbines at Rim of the World High School may end up being just an expensive piece of modern art.

Category: Small Vertical Axis Wind Turbines

A Tale of Two Turbines and Eiffel’s Tower

March 21, 2015,   by Paul Gipe

By now everyone has seen the fawning news accounts—several times, no doubt—that a US company has installed two wind turbines inside—yes, inside—the Eiffel Tower.[more]

Category: Small Vertical Axis Wind Turbines, Rooftop & Urban Wind, Urban Green Energy (UGE)

WWEA: New Feed-in Tariffs for Small Wind Coming in Denmark

March 16, 2015,  

The planned remuneration is 0,33 € per kilowatt-hour (kWh) for units up to 10 Kilowatt (kW) and 0,20 €/kWh for up to 25 kW.

Category: Feed-in Tariffs for Small Wind

Shock drop in small-scale wind turbines triggers calls for Feed-in Tariff reform

March 13, 2015,  

The Government has been urged to make urgent changes to the Feed-in Tariff after a new RenewableUK report revealed an alarming 77% drop in the number of new small-scale wind turbines.

Category: Small Wind folder, Great Britain

The Unknown Wind Turbine of San Francisco Bay or Angel Island State Park’s Enertech E44

February 3, 2015,   by Paul Gipe

Yes, there’s a wind turbine in San Francisco Bay. It’s probably one of only two commercial wind turbines in all of Marin County. Yes, it’s in a state park too. It’s been there for more than three...[more]

Category: News on Large Wind, Rooftop & Urban Wind

Bay Area Wind Turbines (No, the Other Bay)

February 2, 2015,   by Paul Gipe

Boston and the communities around Boston Harbor have more commercial wind turbines than the entire San Francisco Bay, including one 1.5 MW wind turbine within Boston's urban core. Yes, it's a real...[more]

Category: News on Large Wind, Rooftop & Urban Wind

SWCC: IRS Issues New Guidance for Small Wind Turbines to Qualify for 30% Tax Credit

January 21, 2015,   by Heather Rhoads-Weaver

The U.S. Internal Revenue Service (IRS) has issued a notice providing new performance and quality standards that require certification of small wind turbines in order to qualify for the 30% federal...

Category: Small Wind folder, LEED LEED

Wind into the Grid--A Review

January 7, 2015,   by Paul Gipe

Wind into the Grid by Günther Hacker is an E-book in English about his experience trying to use a small wind turbine for his home in Germany.[more]

Category: book Reviews, Small Wind folder

WIND BEWEGT: Kleine Windräder bauen Vom Miniwindrad bis zum Stromerzeuger

January 6, 2015,   by Günther Hacker und Gabriele Jerke

An E-book by Günther Hacker in German is ideal for home wind experiments. Science teachers with a modicum of German will find it a font of simple wind devices that can be made from craft materials.[more]

Category: Book Reviews of Books auf Deutsch, Small Wind folder

Crimey! MORE Green Going Wrong: Ford to install VAWTs at dealerships

November 27, 2014,   by Kimberly King

I also went to the vendor’s, Wind Energy Corporation’s web site, and all I could locate was a single landing page. Red flag #1. I also searched for Jack Phillips on Linkedin and his background is...

Category: Small Vertical Axis Wind Turbines

The Almost Forgotten Story Of The 1970s East Village Windmill

September 29, 2014,   by Shayla Love

I first heard of the East 11th Street windmill in hushed voices, over cafe con leches at a Cuban restaurant on Avenue C.

Category: News on Small Wind, History of Wind Power

Sheerwind Invelox: all hype, no substance

July 8, 2014,   by Mike Barnard

Sheerwind makes radically inappropriate comparisons between their long-disproven approach to wind generation and actually useful wind generation. The numbers show that they are likely about eighteen...

Category: Shrouded & Ducted Wind Turbines, Sheerwind-Invelox

GSE: Italy to Maintain FIT for Small Wind Turbines

June 18, 2014,  

The tariff for small wind between 20 and 200kW for all the connected turbines in 2014 and 2015 will remain 0.268 €/kWh

Category: Italy FIT, Small Wind folder

Ecotricity buys Evance out of administration

May 16, 2014,  

Evance have an innovative new windmill design 90% of the way through development and nearing the production stage, following the manufacture and supply of almost 2,000 of smaller windmills –between...

Category: Small Wind folder

Quiet Revolution Goes Quiet: Maker of QR5 VAWT Files for Bankruptcy

May 7, 2014,   by Paul Gipe

Quiet Revolution, the one-time manufacturer of an architecturally dramatic helical wind turbine, filed for bankruptcy on 15 April in London. Note: The following is adapted from the forthcoming...[more]

Category: Small Vertical Axis Wind Turbines, News on Small Wind

Poor Comparison Between Small VAWT and Small HAWT: UGE’s VisionAIR Pushing the Limits. . . of Hype

April 23, 2014,   by Paul Gipe

In the spring of 2014, Urban Green Energy (UGE) announced with much fanfare that they had completed third-party performance testing on a new product, the VisionAIR wind turbine. As press releases for...[more]

Category: Small Vertical Axis Wind Turbines, Urban Green Energy (UGE)

Vertical Axis Wind Turbines: Great In 1890, Also-rans In 2014

April 7, 2014,   by Mike Barnard

Vertical axis wind turbines (VAWT) continue to get attention, press and R&D funding. Antagonists of mainstream wind generation continually point at them as if they were a superior technology. People...

Category: Small Vertical Axis Wind Turbines

WWEA: 2014 Small Wind Report

March 24, 2014,  

The world market for small wind has continued to grow: As of the end of 2012, a cumulative total of at least 806’000 small wind turbines were installed all over the world. This is an increase of 10 %...

Category: Small Wind folder

Vertical axis wind turbines aren’t replacing horizontal axis offshore turbines

February 18, 2014,   by Mike Barnard

Over the past few months, an interesting wrinkle on the vertical-axis-wind-turbines-are-better mythology has surfaced: that they are superior offshore and that many countries are investing heavily in...

Category: Small Vertical Axis Wind Turbines, News on Large Wind

Honeywell Windtronics--ACE Hardware’s Revenge

February 17, 2014,   by Paul Gipe

It was an odd call. An ACE hardware store deep in Michigan called with a request for parts to the infamous Honeywell Windtronics “wind turbine”. Naturally I was curious why an ACE hardware store was...[more]

Category: Windtronics

Business Day: Super DAWT investment winded by critics

February 16, 2014,   by Matt Nippert

A wind energy firms' claims it will revolutionise wind power have been questioned by critics following a US$55 million investment in it by the New Zealand Superannuation Fund.

Category: Shrouded & Ducted Wind Turbines, News on Large Wind, FloDesign-Ogin FloDesign-Ogin

FloDesign-Ogin Some Brief Comments

February 12, 2014,   by Paul Gipe

The following is an excerpt from my forthcoming book, Wind Energy for the Rest of Us. It is provided here in the public interest because of recent controversy surrounding FloDesign and...[more]

Category: Shrouded & Ducted Wind Turbines, News on Large Wind, FloDesign-Ogin, Inventions & Questionable Wind Turbines FloDesign-Ogin

Vortec 7 DAWT Summary of Test Results

January 11, 2014,   by Paul Gipe

This summary reflects my view at the time. Key participants were acknowledging the technical failure of Vortec 7, but they couched their failure in arcane technical language at arcane conferences. [more]

Category: Vortec, Inventions & Questionable Wind Turbines Vortec

Grand Jury Indictment of James Alan Rowan of Mag-Wind

November 29, 2013,  

Grand Jury for the Eastern District of North Carolina, Southern Division indictment of James Alan Rowan of Mag-Wind, Enviro-Energies.[more]

Category: Mag-Wind

Rebuttal to Another Eggbeater Oh My--Saskatoon’s Lux

November 15, 2013,   by Glen Lux

Thank you for your critique on the CBC article. I do not expect to get praise or support from anyone in the wind industry for the efforts that I have made, but I do wish you and others, would keep an...[more]

Category: Small Vertical Axis Wind Turbines

Another Eggbeater Oh My--Saskatoon’s Lux: More Over-the-top VAWT Hype

November 8, 2013,   by Paul Gipe

It must be a slow news week out on the Canadian Prairies. No big city mayor smoking crack or threatening to kill someone in Saskatchewan to grab attention. Instead they’re touting another—yes...[more]

Category: Small Vertical Axis Wind Turbines

FBI: Canadian Indicted for Securities and Wire Fraud Touting Mag-Wind

October 24, 2013,  

United States Attorney Thomas G. Walker announced that on October 18, 2013, a federal grand jury in Raleigh, North Carolina returned a two-count indictment charging JAMES ALAN ROWAN with securities...[more]

Category: Mag-Wind, Inventions & Questionable Wind Turbines, Small Vertical Axis Wind Turbines

The Journal: UK farmers turning to wind turbines to supplement income

October 23, 2013,   by Jo Blakemore

A dramatic fall in income, coupled with rising energy costs, is seeing increasing number of farmers turning to wind turbines as an additional source of revenue ahead of looming energy regulator...

Category: News on Large Wind, News on Small Wind, News on Community Power

Britain Surpasses 100 MW of Small Wind

October 22, 2013,   by Paul Gipe

While the British government’s inexplicable decision to build two new nuclear reactors has dominated the headlines, Great Britain has meanwhile achieved two little-heralded milestones in renewable...[more]

Category: News on Small Wind, Feed-in Tariffs for Small Wind, Great Britain

Renewables UK: Small and Medium Wind UK Market Report 2013

October 17, 2013,  

Small and medium wind turbine installations had a total generating capacity of over 102MW at the end of 2012. For the fourth year in a row, the biggest growth in installed capacity was observed in...

Category: News on Small Wind

Questionable Turbines and Siting Give Architects, LEED, Green Builders, and Wind Bad Name

September 9, 2013,   by Paul Gipe

Updated with a photo of the 18 Venger V2 Savonius turbines on the Oklahoma Medical Research Foundation building in Oklahoma City, Oklahoma.[more]

Category: News on Small Wind, Inventions & Questionable Wind Turbines, Small Vertical Axis Wind Turbines, Rooftop & Urban Wind, LEED, Urban Green Energy (UGE) LEED

Gizmag: Are "school of fish" turbine arrays a red herring?

July 23, 2013,   by Mike Barnard

Following the latest round of coverage, Gizmag takes a deeper look at his concept, and wonders whether the idea of packing turbines into as tight a space as possible might overlook some wind energy...

Category: Small Vertical Axis Wind Turbines, Mariah Windspire

Now Danish Feed in Tariff and Tax Break for Gaia-Wind Turbines

July 16, 2013,  

In addition to the market price, Gaia-Wind turbine owners will now get a feed in tariff premium of øre250/kWh (approx. 0.35 EUR/kWh).

Category: Feed-in Tariffs for Small Wind

Wind Cube Squarely Over the Top (Now Re-Branded as Wind Sphere)

July 8, 2013,   by Paul Gipe

Is this another example of Federal capital subsidies driving exceptionally overpriced "wind turbines"?[more]

Category: Shrouded & Ducted Wind Turbines, LEED LEED

DAWT Rebranding as Compact wind acceleration turbine

July 5, 2013,   by Paul Gipe

WARNING: There’s an attempt to rebrand Diffuser-Augmented Wind Turbines (DAWT), also known as Shrouded Wind Turbines as Compact wind acceleration turbine. Why this is so isn’t clear. It is possible...[more]

Category: Shrouded & Ducted Wind Turbines

Diffuser Augmented Wind Turbine Theory--Some Comments

July 5, 2013,   by Paul Gipe

In the past I’ve singled out what are variously called Diffuser Augmented Wind Turbines (DAWT) or Shrouded Rotors for derision. Wind turbine engineers, manufacturers of commercial wind turbines,...[more]

Category: Shrouded & Ducted Wind Turbines

Small Wind Conference Gives Gipe Lifetime Achievement Award

July 2, 2013,  

The Small Wind Conference presented Paul Gipe with its first Lifetime Achievement Award on 19 June 2013 at its annual award ceremony in Stevens Point, Wisconsin.[more]

Category: Small Wind folder

Taylor University Endurance Turbines—Busman’s Holiday

July 1, 2013,   by Paul Gipe

I was making the rounds to Upland, Indiana as part of a family reunion. We’d just stuffed ourselves on ice cream at Ivanhoe’s, an ice cream parlor worth the drive from our hometown of...[more]

Category: Small Wind folder

Mein Gott! Costly VAWT Installed on Cologne High-Rise

July 1, 2013,   by Paul Gipe

I’ve written a lot about the folly of “building integrated” wind turbines, or the corollary, roof top wind turbines. It’s a plague here in the US, Britain, and the Netherlands. To reiterate, the...[more]

Category: Small Vertical Axis Wind Turbines

Urban Wind Another Example--Union City Indiana

June 29, 2013,   by Paul Gipe

I've written before about what is real "urban wind" and in that article I've sited several examples. There are so many examples of functioning, productive "urban wind" worldwide that I don't bother...[more]

Category: Rooftop & Urban Wind, News on Community Power

Another Poorly Sited Hoosier VAWT Vying for Worst Turbine Install

June 29, 2013,   by Paul Gipe

Hoosiers have definitely drunk the cool-aid. Worse, it's another example of architectural greenwashing. According local press reports the Nature Conservancy has installed the "crown jewel" of its...[more]

Category: Worst Turbine Install in History, News on Small Wind, Small Vertical Axis Wind Turbines, LEED LEED

Earth Techling: Making Small Wind Work Takes Big Planning

June 29, 2013,   by Pete Danko

It’s a lovely thought, small wind turbines providing clean supplemental power at your home or in your community. But you don’t have to go far to find tales of small-wind woe, with newfangled...

Category: News on Small Wind

SkyWolf Wind Turbines

June 28, 2013,  

Gerald Brock, the "inventor" of Windtamer is back at it with a new company using the same Windtamer design.

Category: Windtamer

Arista Power: WindTamer 4.5 GT

June 28, 2013,  

The Windtamer turbine was still being promoted on Arista Power's web site.

Category: Windtamer

Defunct Windspire Wins Greenwashing Award

June 28, 2013,   by Paul Gipe

In the annals of greenwashing, no wind turbine company has done more to develop the technique to a fine art. It’s as if the company’s entire business model was built on finding participants who...[more]

Category: Mariah Windspire, LEED, Small Wind folder LEED

Honeywell Windtronics Kaputt--Finally an End to a Sad Saga of a “Revolutionary Roof Top Wind Turbine”

June 28, 2013,   by Paul Gipe

The true tragedy of this sad saga is that anyone with a modicum of technical expertise would easily have seen that the entire edifice was built upon a fundamentally flawed design with a business...[more]

Category: Windtronics

Decommissioning Guide to Small Wind Turbines in the Built Environment

June 1, 2013,   by Kimberly King

Password: mistralmetrodenizen2013--The aim of this framework document is that it can serve as guidance, as far as it is practical, to those seeking to navigate and obtain approval...

Category: Small Wind folder

MiBiz: Tilting at Windmills? Beleaguered Muskegon wind turbine business closes doors

May 12, 2013,   by Elijah Brumback and Joe Boomgaard

Despite the promise of a revolutionary new technology for small-scale wind energy, one local company has found the industry’s headwinds too stiff to stay in business. . . Even after receiving...

Category: Windtronics

Photos of Small Wind Turbines by Paul Gipe Posted

May 10, 2013,   by Paul Gipe

I've posted photos of small wind turbines from my archives, including photos of Aircon, Aeroman, Bergey, Easywind, Endurance, Enertech-AOC, Fayette, Gaia, Grumman, Jacobs, Mehrkam, Northern Power,...

Category: Small Wind folder

Invest carefully; wind energy ‘innovations’ are rarely kosher

May 8, 2013,   by Mike Barnard

The wind industry isn’t going to be disrupted by someone with an idea and a Powerpoint pitch. If someone is approaching you with a great investment opportunity based on a ‘new’ wind generation...

Category: Small Vertical Axis Wind Turbines, Inventions & Questionable Wind Turbines

Gorlov Helical Wind Turbine

April 26, 2013,   by Paul Gipe

The helical rotor design is reputed to reduce or eliminate the torque ripple encountered in traditional two-blade Darrieus or eggbeater turbines.[more]

Category: Small Vertical Axis Wind Turbines, LEED LEED

FloWind’s Extended Height to Diameter VAWT

April 23, 2013,   by Paul Gipe

FloWind’s development of the Extended Height-to-Diameter (EHD) Vertical Axis Wind Turbine was the last gasp of Darrieus wind turbine development in the US.[more]

Category: Small Vertical Axis Wind Turbines, FloWind

Photos of Shrouded & Ducted Wind Turbines Posted

April 22, 2013,   by Paul Gipe

Ducted or shrouded wind turbines have been invented and reinvented throughout the 20th century. Ducted turbines are often wrapped in mysterious, technical babble, such as diffuser augmentation, that...

Category: Shrouded & Ducted Wind Turbines

Photos of (Real) Urban Wind Turbines Posted

April 22, 2013,   by Paul Gipe

While many misconstrue "urban" wind turbines as those mounted atop or integrated into buildings, true urban wind turbines are commercial-scale turbines placed in or near cities, towns, and villages....

Category: Rooftop & Urban Wind, Wind Energy & the Environment

Photos of Building Integrated and Rooftop Wind Turbines

April 19, 2013,   by Paul Gipe

Of the wind turbines shown here, only the turbines atop 12W in Portland, Oregon were probably in service. I doubt that the Windspire turbines on the side of the San Francisco Public Utility...

Category: Rooftop & Urban Wind

Photos of Vertical Axis Wind Turbines

April 19, 2013,   by Paul Gipe

I've added photos of historical interest to my web pages on Vertical Axis Wind Turbines (VAWTs) and Darrieus turbines of various designs. . .[more]

Category: Small Vertical Axis Wind Turbines, News on Large Wind Turbines, FloWind

Mariah Windspire VAWT Measured Performance

March 22, 2013,   by Paul Gipe

There are now several measured power curves of the Mariah Windspire publicly available. This is one of the very few contemporary household-size (small) Vertical Axis Wind Turbines (VAWTs) to complete...[more]

Category: Small Vertical Axis Wind Turbines, Mariah Windspire

WWEA Small Wind World Report 2012

March 21, 2013,  

The total number of small wind turbines installed all over the world reached 730'000 units as of the end of 2011 after 656'000 units in 2010, after 521'000 in 2009 and 460'000 in 2008. These small...

Category: Small Wind folder

Crissy Field Small VAWT Demonstration Photos Posted

March 20, 2013,   by Paul Gipe

These are series of photos of a "demonstration" of "urban wind" using five Vertical Axis Wind Turbines (VAWTs) from three different manufacturers at Crissy Field in San Francisco. They are all very...

Category: Small Vertical Axis Wind Turbines

The Evolution of Rotor and Blade Design

March 7, 2013,   by Jim Tangler

An insightful summary of how the aerodynamic properties of VAWTs differ from HAWTs by an authority on aerodynamics presented at the 2000 AWEA conference. . .

Category: Small Vertical Axis Wind Turbines

Sandia 1982 Proceedings of VAWT Design Seminar—Some Brief Comments

March 7, 2013,   by Paul Gipe

It is unlikely that any “modern” reinvention of Darrieus designs can perform any better than the experimental turbines Sandia and its contractors developed during the late 1970s and early 1980s. . .[more]

Category: Small Vertical Axis Wind Turbines

Power Performance Test Report for the Windspire by Windward Engineering

February 28, 2013,  

The Windspire is a vertical‐axis gyromill. The H‐rotor is 1.22 m (4 ft) in diameter by 6.1 m (20 ft) tall, capturing a swept area of 7.43 m2 (80 ft2). The data presented in this report was collected...

Category: Small Vertical Axis Wind Turbines, Small Turbine Testing, Mariah Windspire

Cleanfield defaults on CAD-1.5m loan over board approved liquidation

February 28, 2013,  

News account on the bankruptcy of Cleanfield Energy. Cleanfield defaults on CAD-1.5m loan over board approved liquidation[more]

Category: Cleanfield

Arizona Daily: Last days for local turbines?

February 21, 2013,   by Joe Ferguson

Carol Curtis, the director of the Coconino County Career Center, said employees were told by Southwest Windpower officials Wednesday that the facility in Flagstaff was going to be closed and they...

Category: Small Wind folder

Market, cost, and technical analysis of vertical and horizontal axis wind turbines—A review

February 19, 2013,   by Paul Gipe

“For all wind turbines, other than those used for more decorative purposes, the cost of energy is important.”[more]

Category: Small Vertical Axis Wind Turbines, News on Large Wind, FloWind

Sandia's Retrospective of VAWT Technology—A Review

February 8, 2013,   by Paul Gipe

This review was a case of cleaning my desktop and before electronically filing away Sandia's year-old report on its work with Vertical Axis Wind Turbines (VAWTs), I'd decided to thumb through it and...[more]

Category: Small Vertical Axis Wind Turbines, News on Large Wind, FloWind

Vertical Axis Wind Turbine Revival?

February 8, 2013,   by Paul Gipe

Since Wind Energy Basics was first published in 1999, there has been an explosion of interest in new vertical-axis wind turbines. In that edition, the conclusion illustrating one photograph was...[more]

Category: Small Vertical Axis Wind Turbines, FloWind

FloWind: The World’s Most Successful VAWT (Vertical Axis Wind Turbine)

February 7, 2013,   by Paul Gipe

Note: The following is an excerpt from my 2009 book Wind Energy Basics Revised: A Guide to Home- and Community-scale Wind Energy Systems. I am reprinting it here because of the constant...[more]

Category: Small Vertical Axis Wind Turbines, News on Large Wind, FloWind

Some Vertical Axis Wind Turbine (VAWT) Resources on the Web

February 7, 2013,   by Paul Gipe

In preparing for a review of a Sandia report on its decades-long research on Vertical Axis Wind Turbines (VAWTs), especially the Darrieus or eggbeater design, I thought it might be wise to first see...[more]

Category: Small Vertical Axis Wind Turbines, News on Large Wind

Scientific American: The Quest for Vertical Axis Wind Turbines Despite Failures

January 29, 2013,   by Robynne Boyd

The quest to slay the faulty dragon of conventional, or horizontal axis, wind turbines (HAWTS) has been an impossible one, thus far. The domination of conventional wind comes from their reliability,...

Category: Small Vertical Axis Wind Turbines

Italian Small Wind Growing with Feed-in Tariffs

November 21, 2012,   by Paul Gipe

The installation of small wind turbines is growing rapidly in Italy since the introduction of feed-in tariffs, according to a report by the Department of Engineering at Milan's Polytechnical...[more]

Category: News on Small Wind, Italy FIT

Build Your Own Small Wind Power System--A review

November 14, 2012,  

Build Your Own Small Wind Power System was written by a small wind systems dealer, Kevin Shea, and a professional journalist, Brian Howard. Be forewarned, this is a big book. It's a modern book. It...[more]

Category: book Reviews, Small Wind folder

Honeywell Windtronics WT6500: October 2012 Report from the Field--Not Operating

October 23, 2012,  

The following is an email from retired civil engineer Lynn Shafer on his experience with the Honeywell Windtronics turbine. Shafer lives in Sedalia, Missouri. If the company posts a response, I'll...[more]

Category: Rooftop & Urban Wind, Windtronics

Paul Gipe Interview with Small Wind Newsletter

October 5, 2012,   by Paul Gipe

Small Wind Newsletter: I was struck, while reading your biography, that you started out in this field at around the same time that many other renewable energy leaders (including Larry Sherwood,...[more]

Category: News on Small Wind

Fox: Some Nevada Mariah Windspire users say returns lacking

September 27, 2012,  

Mariah Power, the company that produced the Sousas' wind turbines, generated headlines several years ago as an example of a successful northern Nevada company making headway in the renewable energy...

Category: Small Vertical Axis Wind Turbines, Mariah Windspire

Earth Techling: Why ‘Breakthrough’ Wind Turbines Are Usually Bunk

September 5, 2012,  

This is the history of wind turbine design breakthroughs. Paul Gipe, a prolific and respected writer on wind power, has seen a million of them. I asked him his view of the Catching Wind Power...

Category: Small Wind folder

DWEA: Requesting Wind Turbine Qualification Criteria for On-Site Renewable Energy Scoring

August 20, 2012,   by Mike Bergey

DWEA believes the current lack of turbine certification and siting criteria under the various LEED rating systems is hurting the distributed wind industry and is counter-productive to the intent of...

Category: Small Wind folder, LEED LEED

Britain Powered by FITs Surpasses US in 2011 Small Wind Capacity

July 26, 2012,   by Paul Gipe

Expected to do the Same in 2012 New Feed-in Tariffs for 2013   The 2010 launch of Britain's feed-in tariff program has pushed the country ahead of the US in the installation of small wind turbine...[more]

Category: Great Britain, Small Wind folder, Feed-in Tariffs for Small Wind

WWEA 2012 Small Wind World Report--A Review

July 25, 2012,   by Paul Gipe

I was just going to pick up the World Wind Energy Association's 2012 Small Wind World Report and extract a few useful numbers to keep myself abreast of the small turbine industry. But once I began...[more]

Category: Small Wind folder, book Reviews

2012 Catalogue of Small Wind Turbines--A Review

May 28, 2012,   by Paul Gipe

The Folkecenter for Renewable Energy (FC) has again published a handy report cataloging small wind turbines available worldwide. The FC's 2012 Catalogue of Small Wind Turbines is the one neutral...[more]

Category: Small Wind folder, book Reviews

Reno Nevada Proves--Again--that "Small Urban Wind" Produces Poor Results

May 22, 2012,   by Paul Gipe

Reno, Nevada is vying for the world record for "Worst Turbine Install in History" through sheer scale, expense, and hubris. . . [more]

Category: Rooftop & Urban Wind, Small Wind folder, Worst Turbine Install in History, Mariah Windspire

Pieces of Rooftop Wind Turbine Fall Onto Street from Top of Hess Tower Downtown

April 6, 2012,  

The incident helps explain why the whirling turbines, installed as a featured element at the top of the new 29-story tower last summer, have been silent since mid-December. . .

Category: Rooftop & Urban Wind

Local tool shops say WindTronics owes them money

April 2, 2012,   by Dave Battagello, Windsor Star

A pair of local tool and mold shops are owed about $375,000 by a Michigan-based wind turbine company which has closed its production plant after only two years of operation in Windsor.

Category: Windtronics

Small Wind Turbines: Installing small wind turbine generators (WTGs) in the urban/built environment--What not to do

March 14, 2012,   by Kimberly King

cautionary tale about an "urban wind" project gone awry in 1982 . . .

Category: Rooftop & Urban Wind

Presentation on 14 March 2012 by Paul Gipe 01 PGE Urban Wind-Fundamentals of Wind

March 14, 2012,   by Paul Gipe

Category: Rooftop & Urban Wind

Presentation on 14 March 2012 by Paul Gipe 02 PGE Urban Wind-What is It and Small Wind

March 14, 2012,   by Paul Gipe

Category: Rooftop & Urban Wind

Presentation on 14 March 2012 by Paul Gipe 04 PGE Urban Wind-Bay Area Wind

March 14, 2012,   by Paul Gipe

Category: Rooftop & Urban Wind

Presentation on 14 March 2012 by Paul Gipe PGE Urban Wind-Crissy Field

March 14, 2012,   by Paul Gipe

Comments on Crissy Field wind turbine installation in San Francisco. . .

Category: Rooftop & Urban Wind

Boston Museum of Science Wind Turbine Lab: Two-Year Report on Rooftop Wind Turbines

February 29, 2012,   by Marian Tomusiak

The most sophisticated and comprehensive study of small rooftop wind turbines in the Americas concludes rooftop wind turbines are "Not cost-effective at this site". . .

Category: Small Turbine Testing, Rooftop & Urban Wind

Honeywell Windtronics Photos--What It Looks Like

December 13, 2011,   by Paul Gipe

These are photos of the Honeywell Windtronics turbine on display at a vendors booth at the CanSIA exhibition in Toronto, December 5, 2011.[more]

Category: Rooftop & Urban Wind, Windtronics

Paul Gipe Presentation on ZNE-SCE-Wind 01 Intro.pdf

November 16, 2011,   by Paul Gipe

Presentation by Paul Gipe for PG&E Zero Net Energy Homes, Introduction

Category: News on Small Wind, Presentations by Paul Gipe

Paul Gipe Presentation on ZNE-SCE-Wind 02 Sizing

November 16, 2011,   by Paul Gipe

Presentation by Paul Gipe for PG&E Zero Net Energy Homes, Sizing

Category: News on Small Wind, Presentations by Paul Gipe

Windsor Star: Frustrated turbine firm scales back Windsor production

November 5, 2011,  

Windtronics Inc. has scaled back production of small residential and commercial wind turbines at its Windsor plant because incentives for such projects have not yet been included in the province's...

Category: Rooftop & Urban Wind, Windtronics

Consumer Reports Tackles Honneywell Windtronic

October 1, 2011,  

So far, a new wind turbine delivers little . . . Generous federal and local rebates and credits have helped put wind power on a growing list of options that use the forces of nature to trim your...

Category: Rooftop & Urban Wind

Consumer Reports: a new wind turbine delivers little

October 1, 2011,  

But so far, we've seen only a fraction of the total power that WindTronics says we should for our area, even after several visits from a company-authorized installer. At that rate, the Honeywell...

Category: Windtronics, Inventions & Questionable Wind Turbines

DyoCore and Why the Rating of Small Turbines Remains a Black Art

September 23, 2011,   by Paul Gipe

Despite my best efforts, I've been dragged into the DyoCore flap here in California. I successfully ignored Mick Sagrillo's plea to write something. I successfully ignored DyoCore's request to get...[more]

Category: Rooftop & Urban Wind, Small Turbine Product Reviews

Hybrid Electric Home by Craig Toepfer--A review

August 16, 2011,   by Paul Gipe

Toepfer is one of the pioneers of small wind in the US. He, like myself, began their careers by scouring the Great Plains for junk windmills.[more]

Category: book Reviews, News on Small Wind

Wind Power: 20 Projects to Make with Paper-a Review

August 16, 2011,   by Paul Gipe

Wind Power: 20 Projects to Make with Paper by Clive Dobson is a great little book with a wonderful collection of photos and diagrams. I learn something every time I pick up a book, even a children's...[more]

Category: book Reviews, News on Small Wind

Skystream Delivers Less Than Advertised at French Test Site

August 3, 2011,   by Paul Gipe

But Energy Estimates Not Off by Much[more]

Category: Small Turbine Product Reviews

Windtronics Turbine Removed from French Test Site

August 3, 2011,   by Paul Gipe

A Windtronics wind turbine under test at SEPEN in southern France was removed within the first month of operation, according to Jay Hudnall, an expert in the French small wind turbine industry.[more]

Category: Rooftop & Urban Wind, Windtronics

Presentation by Paul Gipe for PG&E Zero Net Energy Homes, Introduction

July 21, 2011,   by Paul Gipe

Plus Energy Building: Wind Energy, Small Wind, & Community Wind

Category: News on Small Wind, Presentations by Paul Gipe

Presentation by Paul Gipe for PG&E Zero Net Energy Homes, Sizing

July 21, 2011,   by Paul Gipe

Category: News on Small Wind, Presentations by Paul Gipe

Honeywell Windtronics Wind Tunnel Comments

July 21, 2011,   by Paul Gipe

Because of my early postings (December 30, 2008) about the Honeywell Windtronics turbine, other observers have been sending me their comments on the product.[more]

Category: Rooftop & Urban Wind

Honeywell Windtronics Update on Recommendation for 12 mph Sites

July 19, 2011,   by Paul Gipe

After posting my article Honeywell Windtronics WT6500 Report from the Field, the president of the company contacted me to note that their web site clearly says that they recommend using the turbine...[more]

Category: Rooftop & Urban Wind, Windtronics

Honeywell Windtronics WT6500: Report from the Field

July 6, 2011,   by Paul Gipe

Retired civil engineer Lynn Shafer wants to do the right thing and leave the world a better place for future generations. In 2010 he installed 5 kW of solar PV on his house near Sedalia, Missouri....[more]

Category: Rooftop & Urban Wind, Windtronics

Elena Diffuser Augmented Wind Turbine (DAWT) Update

June 28, 2011,  

Zero, Null, Nada Generation in One Year--After one full year of operation, the Elena DAWT has produced zero net electricity.

Category: Shrouded & Ducted Wind Turbines, Elena Energie

Community Colleges Offering Wind Courses in North America

June 23, 2011,   by Paul Gipe

Because of the rapidly growing demand for windsmiths (wind energy technicians) in North America, several community colleges have begun offering associate degree programs. Several of these programs,...[more]

Category: News on Small Wind, Wind Training Courses, News on Large Wind

Presentation by Paul Gipe at the Husum Small Wind Summit 2010

February 19, 2011,   by Paul Gipe

What Small Wind Needs to Make Its Mark

Category: News on Small Wind, Presentations by Paul Gipe

Charts of Field Tests on Air Breeze BR0001068

February 1, 2011,   by Paul Gipe

We have operated an Air Breeze BR0001068 since December 2007. The turbine has performed well without any problems and significantly quieter than previous versions in the Air series of micro wind...[more]

Category: Wulf Small Wind Turbine Test Field Results

Putting Wind Turbines on City Rooftops-Cleanfield Energy Gaining International Attention

December 16, 2010,  

Press release claiming that Cleanfield was installing its VAWTs on rooftops "around the world." The press release implies Cleanfield's association with McMaster University and Ontario's Centres of...[more]

Category: Cleanfield, Rooftop & Urban Wind

Wind Turbine Generator System Acoustic Noise Test Report for the ARE 442 Wind Turbine

November 1, 2010,   by A. Huskey and J. van Dam

The acoustic noise test was conducted to the IEC 61400-11 Edition 2.1.

Category: Small Turbine Testing

MORE ‘Green Gone Wrong’: Greenway Self-Park WTG installation, Chicago, IL, USA

September 20, 2010,   by Kimberly King

Based on what I have been able to locate, I think this structure is another example of ‘Green Gone Wrong.’ I reiterate, I think we need to be mindful about NOT over-hyping some green(er)...

Category: Rooftop & Urban Wind

French Form Small Wind Group

July 30, 2010,   by Paul Gipe

On May 5th, 2010 two-dozen French small wind advocates gathered at the SEPEN test site near Narbonne, France. The meeting was called to discuss the future of small wind in France and whether there...[more]

Category: News on Small Wind

Small Scale VAWT Wind Turbines Optimized for Low Wind Speeds

June 2, 2010,   by T. Letcher

A combination of common vertical axis wind turbines (VAWT) rotors was designed and tested for optimal performance in low wind speeds.[more]

Category: Mariah Windspire, Small Vertical Axis Wind Turbines

Green Investing: This is Why You Avoid Story Stocks

May 24, 2010,   by John Rubino

In retrospect, a little more skepticism would have been in order, because this is exactly the kind of thing you see constantly in hot markets. Revolutionary technology, lots of interest that will...

Category: Windtamer

Boston Museum of Science holds conference on small wind turbine project

May 19, 2010,  

Back in December I stopped by the Boston Museum of science and checked out the public display of data from their small wind turbine experiment, and I posted some of the publicly available data here...

Category: Rooftop & Urban Wind

Adeeb Saba assumes responsibility for product development at WindTamer Corporation

May 19, 2010,  

William A. Schmitz, Chief Executive Officer of WindTamer Corporation, said that, “The decision of the Board of Directors and me to no longer have Mr. Brock head the research and development of the...

Category: Windtamer

Presentation by Paul Gipe for Comité de Liaison Energie Renouvelables, Paris, May 7, 2010

May 7, 2010,   by Paul Gipe

Small Wind in North America, the Good, the Bad, the Ugly; Real Urban Wind & the Community Power Revolution

Category: News on Small Wind, Presentations by Paul Gipe

Elena Diffuser-Augmented Wind Turbine (DAWT)

May 7, 2010,   by Paul Gipe

Have Parisians Drunk the Kool-Aid?[more]

Category: Shrouded & Ducted Wind Turbines, Elena Energie

Presentation by Paul Gipe at the DERBI 2010 International Conference, Perpignan France

May 4, 2010,   by Paul Gipe

What Small Wind Needs to Make Its Mark

Category: News on Small Wind, Presentations by Paul Gipe

CanWEA Calls for Small Wind Feed-in Tariffs in Ontario

April 23, 2010,   by Paul Gipe

The Canadian Wind Energy Association (CanWEA) has called on the Ontario government to offer feed-in tariffs designed for small wind turbines.[more]

Category: Feed-in Tariffs for Small Wind

Power From the Wind A Review by Paul Gipe

April 20, 2010,   by Paul Gipe

Subtitled "A practical guide to small-scale energy production," the book follows ground well trod before and seeks to capitalize on the odd American desire to run their kilowatt-hour meter backwards.[more]

Category: book Reviews, News on Small Wind

Wind Power for Dummies A Review by Paul Gipe

April 16, 2010,   by Paul Gipe

Wind Power for Dummies by Ian Woofenden is the mass-market, mainstream book on small wind turbines that the industry has long sought as a measure of respectability. [more]

Category: book Reviews, News on Small Wind

Urban Wind Energy--A Review

April 15, 2010,   by Paul Gipe

I feared the worst when I saw the title. As an outspoken critic of so-called "Urban" wind and especially the British variety, I thought the book would be destined for the dust bin after the first...[more]

Category: Rooftop & Urban Wind, book Reviews

More thoughts on the Portland, OR, USA 12W Bldg wind turbine array

April 12, 2010,   by Kimberly King

As I am learning, most designers tend to quietly dismiss a project's failings, and don't repeat installations like this. And so, as with folks in the USA not paying attention to the results of the...

Category: Rooftop & Urban Wind

Small Wind Turbine Classification and Performance in Germany

March 30, 2010,   by Paul Gipe

The following data is summarized from a presentation by Paul Kühn, Fraunhofer-Institut für Windenergie und Energiesystemtechnik (IWES), at Husum, Germany, March 20, 2010 based on observations of...[more]

Category: News on Small Wind

Mariah: Another Performance Report on Windspire VAWT

March 30, 2010,   by Paul Gipe

The French test site, SEPEN (Site Expérimental pour le Petit Eolien de Narbonne), published a performance report 28 September 2009 on Mariah's 1.2 kW Windspire. The test site is in a windy region in...[more]

Category: Small Turbine Testing, Small Vertical Axis Wind Turbines, Mariah Windspire

Design Engineering Cleanfield Energy - McMaster's collaboration boosts wind turbine performance

February 9, 2010,  

Article claiming that McMaster improved the VAWTs performance 50% based on wind tunnel tests, according to Dr. Stephen Tullis, leader of the research project and Assistant Professor at McMaster.[more]

Category: Cleanfield

Finally--AWEA Establishes Small Wind Turbine Performance and Safety Standard

January 31, 2010,   by Paul Gipe

Finally, after decades of effort, the American Wind Energy Association has established performance and safety standards for small wind turbines.[more]

Category: Small Turbine Testing

Mariah In the Running for Worst Small Turbine Install

January 31, 2010,   by Paul Gipe

You have to give them credit, small turbine manufacturers are a competitive lot, especially small VAWT suppliers. They are tripping over themselves to see who can win the award for worst turbine...[more]

Category: Worst Turbine Install in History, Small Vertical Axis Wind Turbines, Mariah Windspire

Worst Turbine Install in History?

December 27, 2009,   by Paul Gipe

Mike Nelson call this the worst turbine install in history. It certainly ranks right up there with some recent installations by Mariah, a Vertical-Axis Wind Turbine manufacturer.[more]

Category: Worst Turbine Install in History, Small Vertical Axis Wind Turbines, Mariah Windspire

Small Wind Turbines Monitored at Wulf Test Field

December 6, 2009,   by Paul Gipe

Below is a tabular list of the micro and mini wind turbines tested at the Wulf Test Field and the type of tests performed. [more]

Category: Wulf Small Wind Turbine Test Field Results

Wulf Test Field Equipment Description

December 6, 2009,   by Paul Gipe

During the winter of 1998 through the spring of 1999, I installed equipment to measure the power curve of first mini and then eventually micro wind turbines. The description of this effort and the...[more]

Category: Wulf Small Wind Turbine Test Field Results

Windtamer Hype Needs Trimmed: Betz Beaten Yet Again Raises Questions

December 6, 2009,   by Paul Gipe

Poor Albert Betz, the German physicist must be turning over in his grave. He's been beaten yet again.[more]

Category: Shrouded & Ducted Wind Turbines, Windtamer

Why I Have Chosen Not to Be on the Small Wind Certification Council

November 23, 2009,   by Paul Gipe

I appreciate the vote of confidence in the Small Wind Certification Council's board of directors in appointing me to the Council. It is an honor to be nominated to be part of the commercialization of...[more]

Category: Small Turbine Testing

Feed-in Tariffs for Small Wind Turbines Becoming a Reality

November 5, 2009,   by Paul Gipe

Presentation by Paul Gipe for ASES Solar 2009

Category: Feed-in Tariffs for Small Wind, Presentations by Paul Gipe

Photos of Small Wind Turbines Tested at Wulf Field

November 3, 2009,   by Paul Gipe

     [more]

Category: Wulf Small Wind Turbine Test Field Results, News on Small Wind

Advanced Renewable Tariffs for Small Wind Turbines

November 1, 2009,  

Presentation by Paul Gipe for CanWEA 2009 Conference, Toronto, Ontario. Includes a summary of feed-in tariffs for small wind turbines worldwide and a review of small wind program performance in the...

Category: Feed-in Tariffs for Small Wind, Presentations by Paul Gipe

Selsam Super Twin Removal

October 31, 2009,   by Paul Gipe

The turbine had failed sometime in the spring of 2009. We were living in Canada for most of the spring and early summer. When we returned it was the fire season and we didn't drive onto the site...[more]

Category: Wulf Small Wind Turbine Test Field Results

Wind Turbines at the Boston Museum of Science: Production Data

October 29, 2009,  

First, here’s a view of the installation from the north bank of the Charles river,

Category: Rooftop & Urban Wind

Quick Grab a Stake--Mag-Wind Rises from the Grave

October 20, 2009,   by Paul Gipe

Mag-Wind is back. Grab your children. Bar the door. The dead walk. . . Worse Ed Begley and Jay Leno, those omnipresent endorsers of all things "green", have leapt to the aid of the undead. Their...[more]

Category: Small Vertical Axis Wind Turbines, Inventions & Questionable Wind Turbines, Rooftop & Urban Wind, Mag-Wind

Earthtronic's Honeywell Windtronics WT 6500--A Review

October 16, 2009,   by Paul Gipe

I've reviewed the series of preproduction wind turbine designs from Earthtronics twice before. See below.[more]

Category: Small Turbine Product Reviews, Windtronics

Ducted or Augmented Turbines--Enflo

October 12, 2009,   by Paul Gipe

Ducted or shrouded wind turbines have been invented and reinvented throughout the 20th century.[more]

Category: Shrouded & Ducted Wind Turbines

Coal Plants Closing, People Owning Their Own Power, Feed-in Tariffs and More

October 5, 2009,  

A podcast interview with Paul Gipe, author of Wind Energy Basics

Category: News on Small Wind

Britain's Energy Savings Trust Finds Small Wind Turbines Perform Poorly in Tests

September 9, 2009,   by Paul Gipe

Confirms That Rooftop Mounting Doesn't Deliver[more]

Category: Rooftop & Urban Wind

Press Release: Cleanfield Energy Receives UL Certification for Its 3.5 kW Vertical Axis Wind Turbine

August 7, 2009,  

Press release using a common ploy to confuse amateurs by announcing UL certification. UL only certifies electrical performance not whether the wind turbine will work as a wind turbine or work well at...[more]

Category: Cleanfield

Fantasy Wind Turbines or If It's Too Good To Be True . . .

July 20, 2009,   by Paul Gipe

Scams, Frauds, & Flakes--Tell-Tale Signs[more]

Category: News on Small Wind, Inventions & Questionable Wind Turbines, Shrouded & Ducted Wind Turbines, Vortec, Sheerwind-Invelox, FloDesign-Ogin, Elena Energie, Windtamer VortecFloDesign-Ogin

Warwick [Small] Wind Trials

July 17, 2009,  

Performance monitoring of rooftop wind turbines in Great Britain

Category: Small Turbine Testing

Warwick Wind Trials Gives Failing Grade to Rooftop Wind

July 17, 2009,   by Paul Gipe

If further proof is needed that mounting wind turbines on rooftops is a bad idea, the final report on the Warwick Wind Trials is it.[more]

Category: Rooftop & Urban Wind

Review of Earth4Energy

July 7, 2009,   by Dan Fink

To avoid a deal "that's too good to be true".

Category: Small Turbine Product Reviews

Pennsylvania Adopt An Anemometer Program 1980

July 4, 2009,   by Paul Gipe

  The document below is a scanned copy of Adopt an Anemometer: A Unique Anemometer Loan Program created circa 1980 by the Center for Alternative Resources for the US Department of Energy. The...[more]

Category: News on Small Wind, News on Wind Energy

Muncie VAWT--An Expensive Demonstration

June 22, 2009,   by Paul Gipe

The Muncie (Indiana) Star recently reported that the Delaware County Redevelopment Commission awarded almost $1 million to a relatively little known German company.[more]

Category: Small Vertical Axis Wind Turbines

Wind turbines at Boston's Museum of Science

June 12, 2009,   by Ben Polito

It was interesting to compare the behavior of the various turbines.

Category: Rooftop & Urban Wind

New US Rooftop Wind Turbine Lab

June 1, 2009,  

The Boston, Massachusetts, Museum of Science, is installing a rooftop Wind Turbine Lab in the summer of 2009.

Category: Rooftop & Urban Wind

Calculated Yield of Small Wind Turbines at Zeeland Test Site

May 26, 2009,   by Paul Gipe

Data on actual measured performance of small wind turbines at the Test Field for Small Wind Turbines in Zeeland, the Netherlands. The site has a very low average wind speed of only 3.8 m/s during the...[more]

Category: Small Turbine Testing

Energy Ball--A Review

May 23, 2009,   by Paul Gipe

I've been putting off writing anything about the "Energy Ball" simply because there are too many of these "inventions" for one person to track, analyze, and report on. Like many of these...[more]

Category: Inventions & Questionable Wind Turbines, Small Turbine Product Reviews

Earthtronics (Honeywell Windtronics) WT 6000

May 22, 2009,   by Paul Gipe

Conclusion? Again, it's unlikely that this wind turbine will produce the reported generation anywhere in Michigan by a large margin.[more]

Category: Windtronics

Commentary on the Skystream 3.7

May 9, 2009,   by Paul Gipe

The Skystream uses a 3.72-meter diameter, three-blade, downwind rotor. Southwest Windpower claims that this rotor will deliver 1.8 kW at its rated speed of 9 m/s and generate 4,800 kWh per year at an...[more]

Category: Small Turbine Product Reviews

Skystream Field Observations

May 7, 2009,   by Paul Gipe

Twice now on our way to Pearson International Airport in Toronto we've passed two Skystreams in operation at a shopping center. They've both been operating both times. That's plus, we need a lot more...[more]

Category: Small Turbine Product Reviews

Small-scale wind turbines in cities and suburbs

May 2, 2009,  

Presentation at the CanWEA conference i 2007 by S. Tullis at McMaster University.[more]

Category: Cleanfield, Rooftop & Urban Wind

The Folly of Building-Integrated Wind by Alex Wilson, BuildingGreen.com

April 29, 2009,   by Alex Wilson

A thorough analysis of the concept by an experienced renewable energy journalist.

Category: Rooftop & Urban Wind

Small Wind Turbine Testing Results from the National Renewable Energy Lab

April 9, 2009,   by NREL

Gaia-Wind II kW--Power curve and annual energy output

Category: Small Turbine Testing

Product Brochure for Cleanfield 3.5 kW VAWT

March 12, 2009,  

Product brochure by a British company for Cleanfield's 3.5 kW VAWT shown on an unusual monopole tower. To my knowledge the Cleanfield turbine was never certified under the British FIT program. This...[more]

Category: Cleanfield

Youtube Videos of Cleanfield Energy VAWT

February 25, 2009,  

Two videos of Cleanfield VAWTs spinning. The first shows two of its small VAWT on the roof of a what looks like a school in Ontario, Canada. The second shows a group of five turbines at an airport in...[more]

Category: Cleanfield

Guardian: Many home turbines fall short of claims, warns study

January 13, 2009,   by Juliette Jowit

Juliette Jowit The Guardian, Tuesday 13 January 2009 Home wind turbines are generating a fraction of the energy promised by manufacturers, and in some cases use more electricity than they make, a...[more]

Category: News on Small Wind

How Not to Site Vertical Axis Wind Turbines (Mariah Windspire) #1

January 4, 2009,   by Paul Gipe

Stewart Russell captured these photos of a Mariah Windspire installed at the College School in St. Louis. Stewart is an experienced wind hand and noted that the Windspire, which is an unguyed,...[more]

Category: Small Vertical Axis Wind Turbines, Worst Turbine Install in History, Mariah Windspire

IEA 2009 Small Wind Report

January 1, 2009,  

Stats on worldwide development of small wind turbines

Category: News on Small Wind

Renewable Devices Swift Mk II AEO

December 30, 2008,   by Paul Gipe

Britain's Renewable Devices introduced its "Swift" micro turbine several years ago to criticism that its estimates of annual production were inflated. See Roof Top Over the Top in Britain. Since then...[more]

Category: Small Turbine Product Reviews, News on Small Wind, Windtronics, Renewable Devices Swift

Windtronics 760 Estimated Generation

December 30, 2008,   by Paul Gipe

It's unlikely that this wind turbine will produce the reported generation anywhere in Michigan.[more]

Category: Windtronics

New Federal Subsidies Distort the US Small Wind Market

November 14, 2008,   by Paul Gipe

Or How to Increase the Power of the Skystream 3.7 with the Stroke of a Pen[more]

Category: Small Turbine Product Reviews, Feed-in Tariffs for Small Wind

Press Release: Cleanfield Energy Announces Hiring of Wind Energy Specialist

October 24, 2008,  

Press release touting the hiring of an engineer from McMaster University in Hamilton, Ontario as a specialist in wind energy in urban areas.[more]

Category: Cleanfield

Small Wind Turbine Feed-in Tariff Calculations

October 15, 2008,   by Paul Gipe

The following tables are provided as a public service. Feedback is welcome. [more]

Category: Feed-in Tariffs for Small Wind

Homebrew Wind Power--A Review

October 2, 2008,   by Paul Gipe

Finally, a detailed-some would argue exhaustive-treatment of how to build your own backyard wind turbine. The authors, do-it-yourselfers who actually know what they're doing, are the powers behind...[more]

Category: book Reviews, News on Small Wind

Aerovironment's AVX 1000 Rooftop Turbines at Logan Airport

September 26, 2008,   by Paul Gipe

AeroVironment has installed 20 units of its AVX 1000 rooftop turbines on a building at Boston's Logan International Airport. The 20 kW installation, part of what AeroViron[ment calls its...[more]

Category: Rooftop & Urban Wind, Small Turbine Product Reviews, LEED LEED

How Not to Site Vertical Axis Wind Turbines (Mariah Windspire) #2

September 26, 2008,   by Paul Gipe

This is a classic example of how not to install wind turbines to best advantage. The best that can be said about this installation is that at least they were not mounted on top of the building.[more]

Category: Worst Turbine Install in History, Small Vertical Axis Wind Turbines, Mariah Windspire, LEED LEED

Small-scale wind energy Technical Report by Britain's Carbon Trust

August 1, 2008,  

Category: Rooftop & Urban Wind

Massachusetts Small Wind Report

July 1, 2008,   by Paul Gipe

Consultants to the Massachusetts Technology Collaborative have issued a damning report on the performance of small wind turbines installed under the MTC's subsidy program.[more]

Category: Small Turbine Testing

Advanced Renewable Tariffs for Small Wind Turbines

June 6, 2008,   by Paul Gipe

Presentation by Paul Gipe for the Interstate Renewable Energy Council, June 2008

Category: Feed-in Tariffs for Small Wind, Presentations by Paul Gipe

Small Wind Turbines and Birds

March 18, 2008,   by Paul Gipe

Despite the problem among the thousands of medium-size turbines in the Altamont Pass, there's little data on the impact from single medium-size turbines, small clusters of machines, or small wind...[more]

Category: News on Small Wind

Small Turbine VAWTs and Rotor Loading

February 25, 2008,   by Paul Gipe

February 25, 2008 Below is summary of principle characteristics of mini- and household-size Vertical Axis Wind Turbines on the international market. It is not intended to include every VAWT marketed...[more]

Category: News on Small Wind

Building Integrated Wind

February 25, 2008,   by Paul Gipe

Related to the interest in rooftop mounting of small wind turbines is that of integrating wind turbines into the building structure itself.[more]

Category: Rooftop & Urban Wind

Small Turbine VAWTs and Rotor Loading

February 25, 2008,   by Paul Gipe

Below is summary of principle characteristics of mini- and household-size Vertical Axis Wind Turbines on the international market. It is not intended to include every VAWT marketed worldwide.[more]

Category: Small Vertical Axis Wind Turbines

Small-scale Vertical Axis Wind Turbines: Wind tunnel testing results

February 22, 2008,  

Cleanfield’s first prototype small-scale Vertical Axis Wind Turbine (VAWT) has been tested in the wind tunnel at National Resources Canada’s laboratory in Ottawa.[more]

Category: Cleanfield

Tests on Small Wind Turbines at Applachian State University

January 17, 2008,   by Paul Gipe

Applachian State University has tested a number of wind turbines at its Beech Mountain Small Wind Research and Demonstration Facility. ASU has published reports on both performance and noise. It is...[more]

Category: Small Turbine Testing

Whisper H40 ASU Power Curve

January 1, 2008,  

Tests on the Whisper H40 at Applachian State University's Beech Mountain Small Wind Research and Demonstration Facility by Brent Summerville confirm earlier power curve tests on the H40 at the Wulf...[more]

Category: Small Turbine Testing

Air X ASU Power Curve

January 1, 2008,  

Tests on the Air X at Applachian State University's Beech Mountain Small Wind Research and Demonstration Facility by Brent Summerville differ inexplicably with power curve tests on the Air X at the...[more]

Category: Small Turbine Testing

Early Field Tests on Air Breeze BR0001068

December 27, 2007,   by Paul Gipe

We installed an Air Breeze at the request of Southwest Windpower in mid December. The turbine was provided by SWP at no charge. We are testing the turbine pro bono.[more]

Category: Wulf Small Wind Turbine Test Field Results

Urban Wind Field Trials in Great Britain

December 17, 2007,   by Paul Gipe

The following documents were made available to the public in Great Britain. They refer to the field trials of several dozen micro and mini wind turbines installed on buildings in urban and rural...[more]

Category: Rooftop & Urban Wind

Air X ABeta004 Wulf Test Field Final Report

December 15, 2007,   by Paul Gipe

The Air X s/n ABeta004 was installed for noise testing in December 2003. It ran unattended until the fall of 2007 when it failed.[more]

Category: Wulf Small Wind Turbine Test Field Results

Wind Turbines for use in Cities and Suburbs: Basic Wind Physics

December 7, 2007,   by Stephen Tullis

Presentation by Stephen Tullis, McMaster University.[more]

Category: Cleanfield, Rooftop & Urban Wind

Small-scale wind turbines in cities and suburbs: Current practice

December 7, 2007,   by Stephen Tullis

In this presentation, Stephen Tullis of McMaster University calls attempts to use Vertical-Axis Wind Turbines in urban environments "promising," but notes they are too new to conclude much.[more]

Category: Rooftop & Urban Wind, Cleanfield

Wulf Test Field Panorama Views

November 27, 2007,   by Paul Gipe

The Wulf Test Field is situated at latitude 35° 4'20.64"N and longitude 118°23'40.12"W and is at an elevation of 4,600 feet (1,400 m) on the north facing flanks of the Tehachapi Mountains in the...[more]

Category: Wulf Small Wind Turbine Test Field Results

Wind Power Production in the Urban Environment

November 23, 2007,  

Technical paper by S. Tullis and his students at McMaster University examining the wind flow around and over buildings. The work was funded by the Ontario's Centres of Excellence.[more]

Category: Cleanfield, Rooftop & Urban Wind

CFD Simulation of Dynamic Thrust and Radial Forces on a Vertical Axis Wind Turbine Blade

November 23, 2007,  

Another technical article by S. Tullis on what was the Cleanfield 3.5 kW VAWT.[more]

Category: Cleanfield

Vibration Analysis of a Vertical Axis Wind Turbine Blade

November 23, 2007,  

Another research paper by S. Tullis and his students at McMaster Univeristy. The paper acknowledges funding from the Ontario Centres of Excellence and Cleanfield Energy.[more]

Category: Cleanfield

Rooftop Wind Turbines at Montreal's Biosphere

November 4, 2007,   by Paul Gipe

The building houses exhibition on water and now on energy. There are two wind turbines installed on the roof as shown in the photos below.[more]

Category: Rooftop & Urban Wind

Cleveland's Urban Wind Turbine

September 5, 2007,   by Paul Gipe

Cleveland's Great Lakes Science Center installed a 225 kW Vestas V27 wind turbine in 2006 on the city's harbor front between the Cleveland Brown's football stadium and the science museum. The V27 is...[more]

Category: News on Large Wind, News on Wind Energy, Rooftop & Urban Wind

Solar Without Limits: Breaking Free from Net Metering

August 8, 2007,   by Paul Gipe

For more than a decade, senior environmental leaders in North America have been waiting for Germany's renewable energy market to collapse, an expectation tinged with schadenfreude.[more]

Category: News on Solar Energy, News on Small Wind

Mag-Wind Pyramidal Power

July 13, 2007,   by Paul Gipe

The pyramids have always been thought to contain some magical power. Maybe they do. Maybe Mag-Wind has found a way to tap into this magical power, because they certainly are not going to get much...[more]

Category: Small Vertical Axis Wind Turbines, Inventions & Questionable Wind Turbines, Rooftop & Urban Wind, Mag-Wind

Preparing for Prime Time: What Small Wind Needs to Make Its Mark

July 10, 2007,   by Paul Gipe

Presentation to CanWEA's 2007 Conference

Category: Feed-in Tariffs for Small Wind

Performance Testing of a Small Vertical-Axis Wind Turbine

June 1, 2007,  

Performance testing of the Cleanfield VAWT in the 9 m NRC wind tunnel. The test results showed nothing unusual and because they were performed in a wind tunnel are not considered comparable to real...[more]

Category: Cleanfield

Roof Top Over the Top in Britain

May 4, 2007,   by Paul Gipe

Has something happened to the water in Britain since they privatized the water companies? Someone should check because the British government has gone berserk.[more]

Category: Rooftop & Urban Wind, Renewable Devices Swift

Le Grand Livre de l'Éolien par Paul Gipe

January 31, 2007,   by Paul Gipe

Le Grand Livre de l'Éolien est le livre de référence pour tous les acteurs du secteur et pour tous ceux qui souhaitent y prendre part à l'avenir. Il donne au lecteur une vue exhaustive sur une des...[more]

Category: Book Reviews of Books en Francais, News on Small Wind, News on Large Wind

Performance Testing of a Small Vertical-Axis Wind Turbine

January 22, 2007,  

Another version of the paper by S. Tullis and his students at McMaster University on the wind tunnel tests of Cleanfield's 3.5 kW VAWT.[more]

Category: Cleanfield

Wind Speed Measurement over a roof top in Edinburgh, Scotland by Hugh Piggott

January 6, 2007,   by Hugh Piggott

Category: Rooftop & Urban Wind

Unsubstantiated Claims of Rooftop Wind Turbines

January 5, 2007,   by Hugh Piggott

The following is an open letter by Hugh Piggot to BWEA calling for action on the unsubstantiated claims by promoters of rooftop wind turbines in Britain. Hugh Piggott is one of the world's most...[more]

Category: Rooftop & Urban Wind, Renewable Devices Swift

Choosing Windpower by Hugh Piggott

December 1, 2006,   by Paul Gipe

Hugh Piggott is one of the English-speaking world's true experts on small wind turbines, especially for off-the-grid applications. [more]

Category: book Reviews, News on Small Wind

Roof Top Windsave in Scotland

October 27, 2006,   by Paul Gipe

Stewart C. Russell sent these photos of a Windsave installation in Scotland. The turbine is near his parents house and is installed on an expensive home. Note the sheltering effect from both the...[more]

Category: Rooftop & Urban Wind

Robert Dreeszen's Roof Mounted Wind Turbines

October 25, 2006,   by Robert Dreeszen

I am a retired IBM engineer living in a very remote area of Alaska who is hooked on renewable energy. I am not soliciting advice just merely passing along some photos and very limited experiences you...[more]

Category: Rooftop & Urban Wind

Cleanfield McMaster 'My' VAWT (Vertical Axis)

September 18, 2006,  

This is an exchange on a message board by a student engineer at McMaster University displaying the VAWT they had developed and installed on a rooftop of the campus in Hamilton, Ontario. This VAWT...[more]

Category: Cleanfield

Roof Top Wind in Inaction

July 10, 2006,   by Paul Gipe

With the flap in early July about roof top wind hype in Great Britain, I was surprised to find the controversy dogging my steps into the Sierra Nevada.[more]

Category: Rooftop & Urban Wind

Response by Paul Gipe to Dr. David Anderson Renewable Devices Swift Turbines

July 3, 2006,   by Paul Gipe

Your claims cannot be substantiated by the data made available to the public and it is likely they cannot be verified in the field. [more]

Category: Rooftop & Urban Wind, Inventions & Questionable Wind Turbines, Shrouded & Ducted Wind Turbines, Renewable Devices Swift

Whisper H40 Final Report

June 15, 2006,   by Paul Gipe

We returned to the site to remove the turbine for repair. The blades were removed without incident. However when removing the generator-yaw assembly the entire assembly came off in my hands without...[more]

Category: Wulf Small Wind Turbine Test Field Results

USDA Noise and Power Curve Tests of Small and Household-Size Wind Turbines

June 14, 2006,   by Paul Gipe

he U.S. Department of Agriculture's Agricultural Research Service has a long history of testing wind turbines at its research station near Bushland, Texas. They do good work. They're fair and...[more]

Category: Small Turbine Testing

Small Wind Turbine Size to Meet Household Consumption

May 2, 2006,   by Paul Gipe

You can't get something for nothing. North Americans who think a micro or mini wind turbine will meet all their household consumption are in for a rude surprise. A wind turbine with a rotor 1-2...[more]

Category: News on Small Wind, News on Large Wind

Urban Turbines: What Are They and What Makes Sense

May 1, 2006,   by Paul Gipe

Urban wind turbines. The image is immediately appealing. Most people live in cities. Most people want to use wind and solar energy. Thus, there must be ways for those living in cities--urbanites--to...[more]

Category: Rooftop & Urban Wind

The case (or not) for Roof Mounted Wind Turbines by Nick Martin

January 1, 2006,   by Nick Martin

Are you one of the many people who have read or heard that the next generation of roof mounted wind turbines will provide all the electricity needs of the average semi in the UK?

Category: Rooftop & Urban Wind

Rooftop Turbines: Rooftop Mounting and Building Integration of Wind Turbines

December 12, 2005,   by Paul Gipe

Why You Shouldn't Do It[more]

Category: Rooftop & Urban Wind, News on Large Wind

Allgaier in Holzhausen, Rheinland-Pfalz, Germany

December 4, 2005,   by Paul Gipe

December 4, 2005 Typical of rooftop turbines, the rotor is tied down on this non-operating WE-10 Algaier turbine in Holzhausen, Rheinland-Pfalz, 2005. The turbine is noteworthy in its own right. The...[more]

Category: News on Small Wind

Wind Energy Blows into McMaster

November 5, 2005,  

News item from McMaster University's student newspaper announcing the development of a Vertical-Axis Wind Turbine.[more]

Category: Cleanfield

Net-Metering? It's Time for Wind & Solar Without Limits

June 27, 2005,   by Paul Gipe

The renewable lists buzz with discussions about net metering. Renewable's advocates spend hours, days, years even trying to implement net metering over utility objections. Why bother? Net metering is...[more]

Category: News on Small Wind

Swift Turbine Specs Look Dubious by Stewart Russell

May 9, 2005,   by Stewart Russell

Category: Small Turbine Product Reviews, Rooftop & Urban Wind

Doug Selsam's Super Twin at Wulf Field

May 1, 2005,   by Paul Gipe

Selsam's SuperTwin had operated unattended from March 2008 through sometime in the spring of 2009.[more]

Category: Wulf Small Wind Turbine Test Field Results

The Myths & Mysticism of Vertical Axis Wind Turbines

February 1, 2005,   by Mick Sagrillo

At least several times a year, yet another announcement about a “technological breakthrough” arrives in my e-mail box. Invariably, the device being “unveiled” is a vertical axis wind turbine, and in...

Category: Small Vertical Axis Wind Turbines

Stewart Russell's commentary on Windsave

May 9, 2004,   by Stewart Russell

Stewart knows what he's talking about. He's a pro.

Category: Small Turbine Product Reviews, Rooftop & Urban Wind

Summary of Power Curves Measured at the Wulf Test Field

December 8, 2003,   by Paul Gipe

December 8, 2003 by Paul Gipe For an explantion of the following chart see the article on measuring power curves. Though some of the turbines do not meet their manufacturer's advertised power...[more]

Category: Wulf Small Wind Turbine Test Field Results

Simple Rules for Small Wind Turbine Design by Michael Klemen

November 19, 2003,   by Michael Klemen

Simple Rules for Small Wind Turbine Design by Michael Klemen used with permission. [more]

Category: News on Small Wind

Specifications of Small Wind Turbines Tested for Noise

November 4, 2003,   by Paul Gipe

Specifications of Small Wind Turbines at Wulf Test Field   Rotor Swept Rated Number Approx.   Tip Speed   Tip Speed Turbine Dia. Area Power of rpm   m/s   Ratio   m m2 W Blades @ 8 m/s @ 10...[more]

Category: Wulf Small Wind Turbine Test Field Results

Cruising World Noise Measurements

November 4, 2003,   by Paul Gipe

Cruising World Noise Measurements Turbines Rotor Swept Rated SPL* Tested Dia. Area Power @11 knots   m m2 W dBA Rutland 913 0.91 0.65 70 75 Ampair 100 0.92 0.66 50 78 Air 403 1.17 1.08...[more]

Category: Wulf Small Wind Turbine Test Field Results

Summary of Small Wind Turbine Noise Measurements in dBA

November 4, 2003,   by Paul Gipe

Summary of Small Wind Turbine Noise Measurements at Wulf Test Field in dBA   Hub Reference Slant     Sound   Projected   Projected Turbine Height Position Distance SPL   Power   100   to 45...[more]

Category: Wulf Small Wind Turbine Test Field Results

Comparison of Noise from Small Wind Turbines

November 4, 2003,   by Paul Gipe

Comparison of Noise from Small & Selected Medium-Size Wind Turbines                 ECN/Van der Borg   Difference Turbine Rotor Swept Rated Tip Speed Sound Power   Data Projection @ 8 m/s...[more]

Category: Wulf Small Wind Turbine Test Field Results

Air 403 Noise Measurements

November 4, 2003,   by Paul Gipe

Air 403 Ambient Noise.   Air 403 Noise. Linear regression trend and data for Air 403 charging a constant load. NREL's Arlinda Huskey notes that the data suggests turbine noise begins to level off...[more]

Category: Wulf Small Wind Turbine Test Field Results

Ampair 100 Noise Measurements

November 4, 2003,   by Paul Gipe

Ampair 100 Noise Ambient.     Ampair 100 Noise Charging.   Ampair 100 Noise Unloaded.   Ampair 100 Noise Summary. [more]

Category: Wulf Small Wind Turbine Test Field Results

Summary of Ambient Noise Measurements

November 4, 2003,   by Paul Gipe

    There was generally good agreement with the measurement of ambient conditions for the three seperate tests. Note that the ambient for the Ampair and Air 403 tests was higher than that for the...[more]

Category: Wulf Small Wind Turbine Test Field Results

BWC 850 Noise

September 28, 2003,   by Paul Gipe

BWC 850 Ambient Noise. Linear regression trend and data from one-minute Leq with the turbine parked. Copyright 2001 by Paul Gipe. All rights reserved.[more]

Category: Wulf Small Wind Turbine Test Field Results

Brazilian Tests Confirm Air 403 Underperforms Power Curve

May 23, 2003,   by Paul Gipe

Gustavo de Marsillac Peña presented the findings from a series of laboratory tests on an Air 403 at the American Wind Energy Association's annual conference this week in Austin, Texas.[more]

Category: Small Turbine Testing

AirX Noise Emission Measurements

January 30, 2003,   by Paul Gipe

Both versions of the AirX monitored at the Wulf Test were qualitatively and quantitatively quieter than the Air 403.[more]

Category: Wulf Small Wind Turbine Test Field Results

AirX Fails Power Curve Tests

January 29, 2003,   by Paul Gipe

Tests during 2002 at the Wulf Test Field demonstrate that the AirX fails to meet the manufacturer's power curve by a wide margin.[more]

Category: Wulf Small Wind Turbine Test Field Results

Kleinwindkraftanlagen und ihre Anwendungen

January 1, 2003,   by Paul Gipe

Category: Book Reviews of Books auf Deutsch, News on Small Wind

Wind-Wasserpumpen – ein Überblick

January 1, 2003,  

Category: Book Reviews of Books auf Deutsch, News on Small Wind

More on Small Turbines

January 1, 2003,   by Paul Gipe

Links to more information on small wind turbines.[more]

Category: News on Small Wind

EcoQuest International, WindTree, and AWEA Cease & Desist Order

January 1, 2002,  

False, Misleading and Deceptive Claims Regarding AWEA's Purported Endorsement of WindTree Energy Generator[more]

Category: Small Vertical Axis Wind Turbines

Real Goods' Solar Living Sourcebook 11th Edition

September 24, 2001,   by Paul Gipe

When the 11th edition of Real Goods' Solar Living Sourcebook landed with a thud on my doorstep, I knew I was in for a treat. L[more]

Category: book Reviews, News on Small Wind

Chicago Offshore Wind Negates Crackpot Invention

August 28, 2001,   by Paul Gipe

An edited version of the following was read on National Public Radio's Weekend Sunday program. Weekend Edition Sunday Re: Robbie Harris (sp)'s report on Wind Energy for Chicago/Sunday 26 August,...[more]

Category: Small Vertical Axis Wind Turbines, News on Large Wind

WPM: Vortec Energy collapses -- economics questionable

August 1, 2001,  

Doubts about an unusual approach to turbine design have been proven right with the demise of Vortec Energy, launched in 1994 with strong hopes for its diffuser augmented wind turbine (DAWT) design....

Category: Vortec Vortec

Turbine company runs out of puff

July 20, 2001,   by MELANIE CARROLL

Wind turbine company Vortec Energy is being wound up because its project is uneconomic, despite having raised $23 million in the past five years. . .[more]

Category: Shrouded & Ducted Wind Turbines, Vortec Vortec

Vortec closure no surprise

July 19, 2001,   by Geoff Henderson

The announcement this week that Vortec is closing comes as no surprise to Windflow Technology chief executive, Geoff Henderson. Windflow Technology Ltd is raising $3 million to establish local...[more]

Category: Shrouded & Ducted Wind Turbines, Vortec Vortec

Noise from Small Wind Turbines: An Unaddressed Issue

June 6, 2001,   by Paul Gipe

While it's difficult and time consuming, author Paul Gipe finds that measuring small wind turbine noise is within the reach of amateurs and asks why manufacturers and national laboratories are not...[more]

Category: Small Turbine Testing

Small Wind Turbines Sprouting as Power Prices Rise

January 1, 2001,   by Paul Gipe

California's power crisis has proven fertile soil for a new crop of small wind turbines seen sprouting across the state. From Chico in the north to Temecula in the south, from the coast near San Luis...[more]

Category: News on Small Wind

Ventilators and Squirrels in a Cage

January 1, 2001,   by Paul Gipe

Like ducted turbines, a perennial favorite of hucksters and charlatans is, for lack of a better word, squirrel cage rotors. [more]

Category: Small Vertical Axis Wind Turbines

Spanish Survey of Small Turbine Technology A review by Paul Gipe

October 30, 2000,   by Paul Gipe

Researchers at Spain's national energy center, CIEMAT, reported on a survey of small wind turbine technology at the European Wind Energy Association special topic conference in Kassel, Germany.[more]

Category: News on Small Wind, book Reviews

Testing the Power Curves of Small Wind Turbines

June 6, 2000,   by Paul Gipe

The following article grew out of research for an extensive revision of my book Wind Power for Home & Business published by Chelsea Green. The article is essentially a report on how to test small...[more]

Category: Small Turbine Testing

Comments on a Proposed Performance Standard for Small Wind Turbines

May 25, 2000,   by Paul Gipe

A Memorandum to Colleagues in the U.S. Small Turbine Industry on the Draft Performance Standard AWEA 1.2.2000[more]

Category: Small Turbine Testing

Aerodynamic analysis and monitoring of the Vortec 7 diffuser-augmented wind turbine

January 13, 2000,   by Trevor Nash

Simplified one-dimensional arguments lead to predictions of speed-ups of about 2 and power augmentations of about 4, but such power levels have not been observed to date.

Category: Vortec Vortec

Brakedrum Windmill Plans Year 2000 Edition

January 1, 2000,   by Paul Gipe

Hugh Piggott's plans for turning a used brakedrum into a windmill is welcome addition to the literature on small wind turbines. [more]

Category: book Reviews, News on Small Wind

Air 303H and Air 403 Measured Power Curves

January 1, 2000,   by Paul Gipe

[more]

Category: Wulf Small Wind Turbine Test Field Results

Marlec 910F Measured Power Curve

January 1, 2000,   by Paul Gipe

[more]

Category: Wulf Small Wind Turbine Test Field Results

LVM 6F Measured Power Curve

January 1, 2000,   by Paul Gipe

  [more]

Category: Wulf Small Wind Turbine Test Field Results

Ampair 100 Measured Power Curve

January 1, 2000,   by Paul Gipe

  [more]

Category: Wulf Small Wind Turbine Test Field Results

NZH: Vortec hits second wind with turbine energy technology

December 7, 1999,   by YOKE HAR LEE

Vortec Energy - after spending $5 million on what its chief describes as New Zealand's most expensive "sculpture" - has emerged with new wind-harnessing technology and made its first licensing deal....

Category: Vortec Vortec

Small Turbines Not Left Out of Wind Boom

January 1, 1999,   by Paul Gipe

Wind energy is booming. Not since the heyday of the American farm windmill has wind energy grown at such a dramatic pace. By the new millennium, more than 40,000 medium-size wind turbines will be in...[more]

Category: News on Small Wind

Get A Grip! Raising a Bergey 850 with a Griphoist

December 1, 1998,   by Paul Gipe

The most common technique here in the United States is to raise the tilt-up towers with a truck or tractor. I’ve never been a fan of this approach and I’ve long wondered if there is a better way....

Category: News on Small Wind

Lowering the BWC 850 with a Griphoist

June 22, 1998,   by Paul Gipe

My thanks to everyone on the awea-wind-home list for your help raising the BWC 850. Sunday 21 June, Nancy and I lowered the turbine with the griphoist. (Because we will be traveling for the next five...[more]

Category: News on Small Wind

Status of Vortec 7 Project

April 28, 1998,   by Thomas Ackermann

The New Zealand Wind Energy Association newsletter gives some information about the status of the Vortec 7 project, reports Thomas Ackermann. . .[more]

Category: Shrouded & Ducted Wind Turbines, Vortec Vortec

BWC 850 Measured Power Curves

January 1, 1998,   by Paul Gipe

[more]

Category: Wulf Small Wind Turbine Test Field Results

The Need for an International Small Wind Turbine Test Center

September 24, 1997,   by Paul Gipe

There is a pressing need for an international center to test and demonstrate small wind turbines. In contrast to the medium-sized wind turbine industry, which is nearing technical maturity, small...[more]

Category: Small Turbine Testing

Comments on the Vortec Diffuser Augmented Turbine

July 7, 1997,   by Paul Gipe

I was critical of the development of this wind turbine for several reasons: excessive hype, questionable sales of stock, and the aggressive style of the company's promoter. [more]

Category: Shrouded & Ducted Wind Turbines, Vortec Vortec

New Zealand Sunday Star-Times: Storm over Wind Energy (Vortec 7 DAWT)

July 6, 1997,   by Daniel Riordan

AS WIND turbine generator Vortec Energy gets ready for a 10-city roadshow: to promote its $10m public offering an overseas expert has warned small investors to steer clear, saying the company's...[more]

Category: Vortec, Inventions & Questionable Wind Turbines Vortec

Vortec home page in June, 1997. Copyright 1997 by Vortec Energy Limited.

June 1, 1997,  

Attempt by Vortec to rebut their critics.[more]

Category: Shrouded & Ducted Wind Turbines, Vortec Vortec

NZSM: Getting the Wind Up

June 1, 1997,  

Despite the questions and scepticism, hopes for the new machine remain high, with Vortec predicting that the full-scale machines will produce electricity at about 4 cents/kWhr, or about half that of...

Category: Vortec Vortec

Concentrating Windsystems - Sense or Nonsense?

May 20, 1997,   by Heiner Doerner

Since 1996 we have a "new" old, huge, new-fangled saurian, a device erected in New Zealand. . .

Category: Shrouded & Ducted Wind Turbines, Vortec Vortec

Windmill: Essays from Four Mile Ranch by David Romtvedt--A Review

January 1, 1997,  

Romtvedt struck a chord with me and I found myself reading this fine book through in one sitting. [more]

Category: book Reviews, News on Small Wind

Wind Power Workshop by Hugh Piggott

January 1, 1997,  

Finally, something to supplant Michael Hackleman's aging classic Wind and Windspinners. [more]

Category: book Reviews, News on Small Wind

Wulf Test Field Site Description

January 1, 1997,   by Paul Gipe

Since 1997 Paul Gipe and Nancy Nies have used the site to gain experience installing and operating small wind turbines, to measure small turbine performance and noise emissions, and to experiment...[more]

Category: Wulf Small Wind Turbine Test Field Results

Sandia: Final Project Report: Highenergy Rotor Development, Test and Evaluation

September 1, 1996,  

Conclusion of Sandia's design development contract for FloWind's EHD Vertical Axis Wind Turbine. . .

Category: Small Vertical Axis Wind Turbines, FloWind

Inventus 5 kW Power Curve

January 1, 1991,  

The Inventus 5 kW power curve was measured by Windtest Kaiser-Wilhelm-Koog in Germany using 10-minute averages. Though the turbine is rated at 5 kW it produces 4.5 kW at 12 m/s using the 10-minute...[more]

Category: Small Turbine Testing

Wind Chargers: Building Tools from the Nation's Past by Paul Gipe and Carl Judy, 1983

February 1, 1983,   by Paul Gipe

Yes, it's a very old article that just resurfaced at Mother Earth News.

Category: News on Small Wind

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