[ exact phrase in "" • results by date ]

[ Google-powered • results by relevance ]


News Home

Subscribe to RSS feed

Add NWW headlines to your site (click here)

Sign up for daily updates

Keep Wind Watch online and independent!

Donate $10

Donate $5

Selected Documents

All Documents

Research Links


Press Releases


Publications & Products

Photos & Graphics


Allied Groups

Brakes put on farming wind turbines after rotor problem  

Credit:  The Courier & Advertiser, 16 September 2011 ~~

A leading manufacturer of small-scale wind turbines has advised all 500 of its customers to apply the brakes to the machines as soon as possible.

Proven Energy, based at Stewarton in Ayrshire, has sold many of its 12.1 kilowatt capacity 35-2 turbines in Scotland, particularly for onfarm use, but it has emerged a main rotor fault has resulted in a small number completely.

No calls were being answered yesterday, but a notice on the website advised: “Proven Energy has become aware of a potential manufacturing defect in its Proven 35-2 wind turbine (the Proven 7 and Proven 11 are unaffected).

“We are investigating this, however our work to date has now shown that a significant num-

failing ber of shafts may be affected across multiple manufacturing batches.

“With that in mind we are now advising all Proven 35-2 owners to place their wind turbines on brake as soon as it is safe to do so.”

This is serious news for those who have invested upwards of £45,000 on each turbine, with a number installed in banks of two or three, but there could be worse news to come for those expecting warranty work to be carried out.

Low Carbon Accelerator Ltd, a fund set up to invest in renewable energy and an 81% equity stakeholder in Proven Energy, said it anticipated having to make a “substantial or total write down” of its investment in the firm.

LCA Ltd has invested around £11.2 million in Proven and it is believed a further £500,000 was injected as recently as last month.

At the time slow sales, due to difficulties in receiving planning permission, were being blamed for causing losses that were proving difficult to sustain.

Proven Energy’s smaller models, which are mostly used in domestic situations, are unaffected.

The fault has developed in the farm scale P35-2 model – ironically the first such turbine in the UK to be accredited to the microgeneration certification scheme.

Only by installing an accredited turbine can owners claim the feed-in tariff for the power generated.

With the blades now stationary there will be no income of any sort from the turbines.

It is understood the rotor shaft weakness may have come to the fore during recent gales on a small number of turbines on very exposed sites.

One owner said he had been told that the procedure to strengthen the rotors might not be too complex on undamaged machines. There will, however, be an expense involved and insurance companies will need to be satisfied that the turbines are safe.

Proven Energy Ltd was founded in 1980 in Ayrshire by Gordon Proven. Amongst early successes was a six-kilowatt machine supplied for use in the Antarctic.

Earlier this year the company opened an office in Chicago with a view to making inroads into renewable energy in the USA.

Source:  The Courier & Advertiser, 16 September 2011

This article is the work of the source indicated. Any opinions expressed in it are not necessarily those of National Wind Watch.

The copyright of this article resides with the author or publisher indicated. As part of its noncommercial effort to present the environmental, social, scientific, and economic issues of large-scale wind power development to a global audience seeking such information, National Wind Watch endeavors to observe “fair use” as provided for in section 107 of U.S. Copyright Law and similar “fair dealing” provisions of the copyright laws of other nations. Send requests to excerpt, general inquiries, and comments via e-mail.

Wind Watch relies entirely
on User Funding
Donate $5 PayPal Donate


News Watch Home

Get the Facts Follow Wind Watch on Twitter

Wind Watch on Facebook


© National Wind Watch, Inc.
Use of copyrighted material adheres to Fair Use.
"Wind Watch" is a registered trademark.