Metrics - Wasted Energy - NYTimes.com - 0 views
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Jeff Johnson on 27 Aug 08It's gone before you even knew it was there: As energy is unlocked from fuels at power plants, two-thirds of the energy consumed to create electricity is lost. The laws of thermodynamics dictate that conversion efficiency will never be 100 percent, because heat is lost at every step of the conversion process. But new technologies may be able to greatly increase conversion efficiency, moving from an overall rate of 36 percent to closer to 50 percent. At present, coal - in all its carbon-belching inefficiency - is king because it's cheap. Still, the use of natural gas to create electricity has been rising rapidly, in part because of more-efficient gas turbines. Natural gas prices have been climbing, however, and coal prices could rise as well.