Portsmouth High School Gear Box Probl...

Portsmouth High School Gear Box Problems Wind Turbine

Posted in the Portsmouth Forum

Bill Carson

Mattapoisett, MA

#1 Sep 25, 2012
http://www.nrel.gov/wind/pdfs/41548.pdf

The wind energy industry has experienced high gearbox failure rates from its inception

[1]. Early wind turbine designs were fraught with fundamental gearbox design errors compounded by consistent under-estimation of the operating loads. The industry has learned from these problems over the past two decades with wind turbine manufacturers, gear designers, bearing manufacturers, consultants, and lubrication engineers all working together to improve load prediction, design, fabrication, and operation. This collaboration has resulted in internationally recognized gearbox wind turbine design standards

[2]. Despite reasonable adherence to these accepted design practices, wind turbine gearboxes have yet to achieve their design life goals of twenty years, with most systems requiring significant repair or overhaul well before the intended life is reached

[3,4,5]. Since gearboxes are one of the most expensive components of the wind turbine system, the higherthan-expected failure rates are adding to the cost of wind energy. In addition, the future uncertainty of gearbox life expectancy is contributing to wind turbine price escalation. Turbine manufacturers add large contingencies to the sales price to cover the warranty risk due to the possibility of premature gearbox failures. In addition, owners and operators build contingency funds into the project financing and income expectations for problems that may show up after the warranty expires. To help bring the cost of wind energy back to a decreasing trajectory, a significant increase in long-term gearbox reliability needs to be demonstrated.
Paul Hurley

Providence, RI

#2 Oct 28, 2012
Here is the gear box review done by Donald Roberts :

http://www.portsmouthri.com/documents/Turbine...

This is the video of the Portsmouth Meeting Oct 23, 2012 . You'll see the meeting .In addition the video says that the wind turbine at Otis AFB which is a Furlander with a JAKE gear box has failed .The video is well over an hour but you will get a good understanding of gear box failures

http://www.theportsmouthrecord.com/TownCounci...
Bill Carson

Mattapoisett, MA

#3 Nov 11, 2012
Two Vestas 1.65 MW turbines for sale by the MTC in 2006 at a lower price than the AAER wind turbine ! Why didn't Portsmouth buy one or two of the well known Vestas wind turbines?

Please follow the timeline in the following news items ansd meetings .The Town of Portsmouth could have bought two Vestas V-82 commercial 1.65 Megawatt turbines at that same time the bought an unknown un tested turbine that failed !

http://www.windaction.org/documents/17447MTC : Notice of Availability of Two 1.65 MW Wind Turbines December 7, 2006
Summary: The Massachusetts Technology Collaborative, a quasi-public agency, presented this announcement in 2006 seeking to site two 1.65 megawatt turbines originally slated for the Town of Orleans.Request for Information: Notice of Availability of Two 1.65 MW Wind Turbines, 2007-CE-02
December 8, 2006

http://portsmouthrienergy.com/E2.pdf

August 17,2007 E. Third party developer proposal 8-17-07 To: Gary Gump Economic Development Committee Town of Portsmouth, RI From: Jim Sweeney
http://www.portsmouthrienergy.com/windstudy.p...

October 8, 2007 Page VI The PEDC wishes to acknowledge the following organizations and individuals for their support and the expertise and generosity of time they provided. University of Massachusetts Renewable Energy Laboratory especially Sally Wright.Jim Sweeney of Sustainable New Energy

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