In a Centrifugal Compressor, Can anyone explain why the discharge gas temperature(T2) in polytropic process is higher than discharge gas temperature (T2) calculated in Adiabatic process? I understand that discharge gas temperature (T2) in adiabatic shall be higher than T2 in Polytropic process. This is due to the fact that in adiabatic process there will not be any heat exchange from/to the system and surroundings. Heat generated within the compressor should increase the discharge gas temperature where as in Polytropic process heat will be dissipated to surroundings from casing, bearings, etc. Any help please.
Rotating Equipment Engineer
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