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re: controls as important as thermodynamic efficiency
26 jul 1997
david hatunen wrote:
>seems like a lot of cogen plants only make out because they can sell
>poer at an inflated cost to a hapless utility.
the point of cogen is making useful heat at the same time as electrical power.
suppose you were a utility with a 1 gw nuclear plant sending 2 kwh of heat
and a gallon of water up the cooling tower for every kwh of electrical energy
produced. an alternative is to pipe 2 gw of hot water through 200,000 houses
(10 kw each) to heat them in wintertime, without consuming any water at all.
same electrical power production efficiency, whilst using the "waste heat."
transporting heat is easier on a smaller scale.
nick
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