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There is a way of calculating the theoretical maximum efficiency of a heat engine, Can anyone help?
the formula uses absolute temperature and temperature difference to calculate a theoretical maximum efficiency for a heat engine. Does anyone know the formula, I have forgotten and don't have access to any helpful textbooks.
Thanks Lugo, it is exactly the carnot equation I was looking for.
This is the maximum possible efficiency, and every real heat engine will be less efficient than that. Need this to evaluate appropriate heat sources for their potential as mechanical energy sources. The actual engine to be used is a decision to be made down the track. So the idea of measuring efficiency is not an option. Thanks guys.
4 Answers
- 5 years ago
Carnot efficiency=1- (cold temperature in kelvin)/(hot temperature in kelvin). Carnot efficiency is about 21.44% Actual efficiency =1- (joules of energy released)/(joules of energy received). another equation uses work: Actual efficiency=(work done)/(joules of energy received)
- Anonymous1 decade ago
Obviously you can stick a temperature probe up its exhaust and get the true reading instead of the theoretical maximum.
- 1 decade ago
This is highly technical, however,a heat engine must have an in exaustible well structured,effective temperature and technometer will determine the heatness and efficiency of the engine
Source(s): aicraft experience
