Library filed under Icing

Public safety thrown to the wind

Several years back, we wrote how the Massachusetts Technology Collaborative (MTC), a quasi-public agency tasked with encouraging renewable energy technologies in the State of Massachusetts, gambled $5.28 million in public funds to purchase two new (at the time) Vestes V82 – 1.65 megawatt wind turbines. MTC hoped to jumpstart local public renewable projects by making the Vestas turbines available for sale.
21 Apr 2011

Ice throw and setback distances

Ice_throw-rutgers_thumb This short paper prepared by Professor Terry Matilsky, Department of Physics and Astronomy at Rutgers University, explains how ice or other debris flung from a turbine blade can travel significant distances.
2 Mar 2011

Ice halts northern N.B. wind farm

Northern New Brunswick's cold, icy weather is causing wind turbines to freeze and stop producing power at the Caribou Wind Park near Bathurst. The new wind farm's 33 turbines have been generating power since November, but they have been forced to shut down for the past two days due to ice forming on some of the blades.
18 Feb 2010

Wind operator shares lessons from Whittlesey ice-shedding

A wind developer that became a "lightning rod" for the industry when one of its turbines started shedding ice in December, has revealed its latest strategy for dealing with ice build-up, writes Rachel Johnson. ..."We knew icing would occur but believed our turbines would stop in the event of an ice build up," he said. The investigation revealed that the most widely available guidelines on icing, including those from the BWEA, had said that wind turbines are designed to shut down in the event of an ice build up.
6 Mar 2009

Wind farm has precautions against ice throws

Even when it comes to the giant blades of the turbines in Amaranth and Melancthon, there might be truth in the old expression that "it's an ill wind that blows no good." This might have been the case when the Melancthon I wind project had to be shut down for nine days in December 2006 because of an ice storm and the resultant imbalance of the blades.
4 Mar 2009

Turbine blades with ice buildup

Ice_on_blade-2_thumb This 300-foot industrial-scale turbine (600 kw) in Newburyport, MA is sited just 319-feet from the public pedestrian rail trail, 350-feet from heavily-traveled U.S. Route 1, and 800-feet from the nearest residence. During the public hearing process, the developer insisted "[the turbine] was a long way from the rail trail and if the ice did shed it would be directly below." This photo is provided to Windaction.org by concerned residents in the City of Newburyport, MA. A video showing the ice can be viewed here: http://www.windaction.org/videos/20143 .
23 Feb 2009

Turbine with ice

This 300-foot industrial-scale turbine (600 kw) erected in Newburyport, MA in January 2009 is sited just 319-feet from the public pedestrian rail trail, 350-feet from heavily-traveled U.S. Route 1, and 800-feet from the nearest residence.  Duration: 12 seconds
23 Feb 2009

More wind turbine ice and snow build-up

Video by Gerry Myer, town of Byron, Wisconsin. Residents inside this industrial wind farm in Fond du Lac County, Wisconsin were told ice throw from turbine blades would not be a problem because the turbines automatically shut down when ice and snow build up on the blades. The turbines are 400 feet tall, with a blade span wider than a 747. They appear to be turning slowly because they are so large, but the tip speed on the blades ranges from 90 to 180 miles an hour. Even a small piece of ice thrown at that speed presents a hazard. Wind developers downplayed the problem during the permitting process for this wind farm, saying ice throw is not anything to worry about. The Public Service Commission of Wisconsin took their word for it. These turbines went on line in March of 2008.
8 Feb 2009

Sensor fails to stop ice-terror wind turbine

A sensor which should switch off a wind turbine in icy conditions has failed - for the second time. As reported in The Evening Telegraph last week, a faulty sensor on the turbine in King's Dyke, Whittlesey, was blamed for huge shards of ice flying off its blades and crashing into homes and gardens in November. ..."The turbine was shut down immediately after we were alerted, and will remain in this state until further notice."
24 Jan 2009

Turbines could get 'iced up'

A Meridian Energy witness was scrutinised for not considering Central Otago's harsh winter, which could shut down wind turbines in times of high demand. The Environment Court hearing into the $2 billion Project Hayes windfarm continued yesterday with wind energy consultant Graham White appearing for Meridian. He said in freezing humid condition wind turbines could ice up and no longer operate.
20 Jan 2009

A faulty sensor led to turbine ice shower

A faulty sensor on a giant wind turbine is being blamed for huge shards of ice flying off its blades and crashing into nearby homes and gardens. As The Evening Telegraph reported in November, residents in King's Dyke, Whittlesey, had to take cover for more than four hours when huge lumps of ice, some measuring 2ft, were flung from the giant machine's blades.
17 Jan 2009

Failed sensor caused ice shards

The failure of a sensor to halt a giant wind turbine when temperatures fall is blamed for shards of ice crashing into nearby homes in Cambridgeshire. The Cornwall Light and Power 80m (262ft) turbine was put up in August, near an industrial estate and close to homes in King's Dyke, Whittlesey. On 29 November chunks of ice started crashing into gardens.
16 Jan 2009

Wind turbine with ice on blades

Residents inside this industrial wind farm in Fond du Lac County, Wisconsin were told that ice throw from turbine blades isn't a problem. They were told that if ice forms on the blades, the turbine automatically shuts down. After seeing a piece of ice the size of a bed sheet come flying down from this wind turbine, the resident who shot this video decided to get out his video camera.
30 Dec 2008

Ice-Tossing Turbines: Myth or Hazard?

The wind industry concedes that, as with all tall things (buildings, for example, or trees), ice and snow can build up and, eventually, fall down, creating a hazard to people and structures below. But the industry denies that "ice-throwing" - another concern surrounding wind power - is a problem. ...But a 2006 publication by G.E. Energy, a maker of large wind turbines, warns that "rotating turbine blades may propel ice fragments some distance from the turbine - up to several hundred meters if conditions are right."
11 Dec 2008

Wind turbine's deadly ice shower

Residents were left fearing for their safety after shards of melting ice fell on homes and gardens from the blades of a giant wind turbine. For about four hours people in King's Dyke, Whittlesey, had to take cover as huge lumps - some two feet long - showered them from the 80 metre high tower on Saturday morning. Resident Peter Randall, whose son's house lies a stone's throw away from the turbine, said: "Somebody is going to get killed. There was huge lumps of ice shooting off and landing everywhere.
2 Dec 2008

Turbine risks and accountability

Late last year, Massachusetts Technology Collaborative (MTC), the state's development agency for renewable energy, awarded a $474,340 grant to Mark Richey Woodworking and Design, Inc. of Newburyport MA, for the construction of a single 600KW (292-foot) industrial-scale wind turbine to be sited adjacent to the business.
19 Nov 2008

City stadium turbine plan ditched

Plans for a wind turbine on top of the City of Manchester Stadium have been abandoned for fear of falling ice. Planning permission for the 280ft (85m) turbine - which would have powered the stadium and some neighbouring homes - was granted in August 2006. But the project was delayed after experts warned of a risk of ice falling from the blades in cold weather.
6 Nov 2008

Ice shedding from turbines and public (e-mail)

Zimmerman_ice_throw_email_1-20-2000_thumb Here is a reprint of an email about ice throw at Green Mountain Power's Searsburg wind energy facility in Searsburg Vermont. The email was written by John Zimmerman to an American Wind Energy Association listserv in 2000. Mr. Zimmerman managed the development of the Searsburg facility
9 Mar 2008

http://www.windaction.org/posts?p=2&topic=Icing
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