A perfect heat engine, defined as one operating at 100% efficiency, is theoretically impossible according to the laws of thermodynamics. The mechanical energy produced by such an engine would equal the heat energy input only if it were feasible to achieve absolute efficiency. In reality, the maximum efficiency of a heat engine is determined by the temperatures of the heat source (Th) and the heat sink (Tc), expressed as (Th - Tc) / Th. This fundamental principle underscores the limitations of heat engine efficiency.
PREREQUISITESStudents of physics, engineers working on thermal systems, and anyone interested in the principles of energy conversion and efficiency in heat engines.
This is true, if we were able to build a 100% efficient heat engine (which itself is theoretically impossible), then any heat we put into the engine could be used to do work.wakejosh said:my TA in my physics class told us that if there was a perfect engine powered by heat (100% efficent) then the mechanical energy generated by the engine would be the same as the amount of heat energy used by the engine. I am not sure what he is getting at here, or trying to say by this, but is this even accurate?
Following on what Hootenanny said, which is quite correct, I would prefer to say that this statement is not accurate. A perfect heat engine can not be 100% efficient. It can, at most be Th-Tc/Th efficient where Tc and Th are the temperatures that it operates between.wakejosh said:my TA in my physics class told us that if there was a perfect engine powered by heat (100% efficent) then the mechanical energy generated by the engine would be the same as the amount of heat energy used by the engine. I am not sure what he is getting at here, or trying to say by this, but is this even accurate?