Mar. 22nd, 2009

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Two percent for 90 percent. Fair enough.

Wind Turbines to Ward Off Bat Killings - Washington Times - 23 Mar 09

"A soon-to-be-released study conducted last year at two wind facilities owned by Iberdrola Renewables in Pennsylvania and West Virginia finds that shutting down the turbines during low wind periods can reduce fatalities by more than 90 percent. Ed Arnett, the study´s coordinator, said the deaths occur almost exclusively when turbines are operating at night at low wind speeds. That is when bats are active and feeding because the wind is light enough for insects to fly.

One theory is that the bats think the turbines are large trees and inspect them as potential roosting places. Researchers also think insects are attracted to the white towers at night and may draw bats to the turbines as a feeding ground. Environmentalists and industrial officials say there is a cost to cutting off the turbines at night. Andy Linehan, a bat specialist at Iberdrola Renewables, said that shutting down the turbines during last year´s experiment resulted in a 2 percent reduction in electricity generation. "
webfarmer: (Default)
Two percent for 90 percent. Fair enough.

Wind Turbines to Ward Off Bat Killings - Washington Times - 23 Mar 09

"A soon-to-be-released study conducted last year at two wind facilities owned by Iberdrola Renewables in Pennsylvania and West Virginia finds that shutting down the turbines during low wind periods can reduce fatalities by more than 90 percent. Ed Arnett, the study´s coordinator, said the deaths occur almost exclusively when turbines are operating at night at low wind speeds. That is when bats are active and feeding because the wind is light enough for insects to fly.

One theory is that the bats think the turbines are large trees and inspect them as potential roosting places. Researchers also think insects are attracted to the white towers at night and may draw bats to the turbines as a feeding ground. Environmentalists and industrial officials say there is a cost to cutting off the turbines at night. Andy Linehan, a bat specialist at Iberdrola Renewables, said that shutting down the turbines during last year´s experiment resulted in a 2 percent reduction in electricity generation. "

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