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Cleanfield Energy

Cleanfield Energy was an erstwhile Hamilton, Ontario manufacturer of small, fixed-blade, Vertical-Axis Wind Turbines (VAWTs). I hadn’t written much about them publicly until I edited my private notes for a section on them in my new book Wind Energy for the Rest of Us. As seen in the extract from my book below, I did not think highly of them or their product. They lasted longer than most flash-in-the-pan VAWT promoters, but eventually they too went defunct, stiffing turbines owners, investors, and vendors. One vendor said they installed some 70 turbines mostly in Canada. I have not verified that.

I thought the matter was dead until one of Cleanfield’s suppliers contacted me. Despite Cleanfield’s demise, the vendor remained a die-hard VAWT advocate. This becomes almost religious to some. For that reason I am posting some links and documents on the company for those who need another case study of hubris and hustle in the small VAWT sweepstakes.

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

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

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

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

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

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

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

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-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

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

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

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

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

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

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

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

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