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Politics : The Environmentalist Thread

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To: neolib who wrote (22548)	7/30/2008 1:20:18 PM
From: Maurice Winn	Read Replies (2) of 36921

Neo, 40% efficiency in a thermal power station burning coal is doable. With combined heat and power efficiency can get up to 70% Google has all the answers for you. Here's just one of swarms of links: makingthemodernworld.org.uk Here's another: <The efficiency of various heat engines proposed or used today ranges from 3 percent [1](97 percent waste heat) for the OTEC ocean power proposal through 25 percent for most automotive engines, to 45 percent for a super critical coal plant, to about 60 percent for a steam-cooled combined cycle gas turbine. All of these processes gain their efficiency (or lack thereof) due to the temperature drop across them. > en.wikipedia.org So now you know. As you can see, efficiency is vastly improved in large centralized power stations instead of in dinky little mobile Otto cycle engines in vehicles. If accommodation is built around the power station so the waste heat is all used to keep people warm, then waste heat would be trivial, assuming the power station/city is properly insulated and ventilated. Gung Ho, Mqurice

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