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Forums
Engineering
Mechanical Engineering
Calculation of the efficiency of an engine
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[QUOTE="anorlunda, post: 6020975, member: 455902"] There are lots of internal things that happen in an engine. Compression is one. Friction is another. The only useful definition of efficiency is useful work out divided by work in. Out and in refer to things external to the engine. Useful is also necessary, because for example heat leaves the engine and warms up the environment. That's energy out, but it is not useful. In other words, efficiency is a human measure that you define to be useful for your purposes. In that respect, it is less about physics, and more about your opinions. [/QUOTE]
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Forums
Engineering
Mechanical Engineering
Calculation of the efficiency of an engine
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