Articles filed under Icing
What he found there — using drones to photograph blades after up to 30 hours of exposure to cold and wet conditions similar to those Texas faced — was that ice almost a foot thick built up near the tips of blades and reduced power production up to 80%. Hu explained that ice can negatively affect a wind turbine in more than one way.
That disrupts blade aerodynamics. That disrupts the balance of the entire turbine. And that can disrupt energy production by up to 80 percent, according to a recently published field study led by Hui Hu, Iowa State University's Martin C. Jischke Professor in Aerospace Engineering and director of the university's Aircraft Icing Physics and Anti-/De-icing Technology Laboratory.
Wilcox, who has raised concerns before about wind tower farms in the county, said more needs to be done to address ice sling, suggesting the commissioners implement a fine to be assessed if towers where ice sling is occurring and landing on county roads. She said the safety of county residents is in question on county roadways when such conditions exist.
Technologies exist that can be built into the turbine. Although they are used in Canada, Denmark and Sweden, Hu said the U.S. wind industry has found them to be cost-prohibitive.... blades can incorporate a material that conducts electricity that can prevent icing by warming the blade. He said the cost for the power amounts to roughly 5% of the energy a turbine might typically produce.
The end of the Broad Mountain Power’s presentations was set for Aug. 14 at the Packer Township Zoning Hearing Board’s eighth hearing on Broad Mountain’s proposed wind turbine farm atop Broad Mountain, held Monday night.
Days after several Freeborn County wind turbines had to be shut down after a chunk of ice fell off a blade and landed on a passing semi truck, a family whose home lies within feet of the proposed Freeborn Wind Farm project said they're concerned about something similar happening at their home. ..."I'm sorry but [...] there's no amount of money that's enough comfort for my kids being put in harm's way," he said.
Spokesperson Justin Foss said someone reported ice from a turbine on the Bent Tree Wind Farm hitting a semi-truck on Highway 13. The farm is located in Hartland.
Samuel Bonacci, a spokesman for the college, said the ice flew off the turbine’s blades Tuesday morning, landing on the building and a parking lot used by faculty and staff. It broke a hole in the skylight.
The police and the Health and Safety Executive (HSE) are carrying out a joint investigation, the two authorities confirmed. In a blog post published on 29 January, law firm Thomsons Scotland wrote that the 74-year-old man was a security guard at the wind farm.
“The PSB has sent us a clear message that we may as well stop filing complaints when GMCW is in violation,” said Melodie McLane, who issued the complaint.
When on New Year's Eve he walked along the Mähneweg near Bocholt, a chunk of ice crashed to the ground just a few meters from where he stood. "I've got a huge horror, of course," he says. The approximately 60-centimeter (nearly 2-foot) ice piece had flown down from a 98-meter high wind turbine.
At a special hearing Thursday, representatives from Georgia Mountain Wind appeared before the Vermont Public Service Board to appeal a ruling that wind turbines have violated noise and weather-related specifications listed in the project’s certificate of public good.
Researchers who worked near the 400-foot high wind turbines on peaks above the proposed Balsams ski area say there is reason to be worried about people getting too close: They saw chunks of ice being thrown and found ice craters and broken saplings 930 feet from a turbine.
A hearing officer for the Public Service Board has recommended that Green Mountain Community Wind — the company led by Vermont renewable-energy pioneer David Blittersdorf — be found in violation of its permit for operating wind turbines on Georgia Mountain with iced blades. ...The iced blades produced unusually loud noise, said Melodie McLane.
Cold climate and de-icing technologies are improving the business case for wind power in Canada, but icing prediction and assessment remain problematic for the industry, experts told Wind Energy Update.
Dixville Capital’s attorney is working out an safety plan to address the board’s concern about ice throw and other potential hazards around the Granite Reliable wind towers (owned by Brookfield Power) in the expanded high-elevation ski area, based on an engineer’s report, board attorney Bernie Waugh reported.
In March, the Public Service Board received reports that turbines on Georgia Mountain were operating with dangerous amounts of ice on the blades. The PSB announced this week that it will investigate the allegations.
One of the wind turbines at Ferndale has been tethered after it was found to be leaning
Offshore wind market service provider A2SEA has confirmed that its jack-up barge Sea Worker ran aground early Wednesday morning off the coast of Nymindegab, south of Hvide Sande in Denmark.
Despite growing awareness of the potential for wind power projects in cold climates, turbine manufacturers have yet to deal convincingly with the threat of ice throws.