Efficiency of jet engines
Thread Starter
Joined: Dec 1999
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From: Brisbane Australia
Efficiency of jet engines
If around 27% of heat energy is converted into useful work in a piston engine, can anyone tell me how much heat energy is converted into useful work in a jet engine?
Joined: Aug 2001
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From: Dorset
The conventional wisdom is that good piston engines typical achieve about 30% thermal efficiency, and jet engines achieve about 20%. These are of course generalisations. But the (UK) tax man always gets the first 85% or so if its a car that you are driving!
Joined: Nov 2001
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From: Delta of Venus
Steam (external combustion) engines = 20%
Piston (internal combustion) engines = 30%
Gas turbine engines = 30%
Electric motors = 95% !!
These figures are of course very approximate due to the range of variables involved.
Piston (internal combustion) engines = 30%
Gas turbine engines = 30%
Electric motors = 95% !!
These figures are of course very approximate due to the range of variables involved.
