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Old 10-05-2010, 06:26 PM   #15 (permalink)
bmwboarder
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This page says up to 60% in a combined cycle (I think that means adding a secondary steam turbine?). It also says a standard one can produce 35-40% thermal efficiency. Though on other pages I find efficiencies stated anywhere from 15%-85%...

Gas turbine - Wikipedia, the free encyclopedia

This page says even over 60% is possible:
Turbine Efficiency

Also interesting:
Turbine Calculation

I guess the big question is, what kind of efficiency can they achieve in a microturbine that fits and works in a car?
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