815.5 The efficiency of real heat engines and refrigerator engines What is the most efficient heat engine or refrigerator that can operate between two gIven reservoirs 1. Heat engines The efficiency of a Carnot heat engine is the maximum efficiency of a heat engine operating between the two given reservoirs Prove this statement by contradiction 815. 5 The efficiency of real heat engines and refrigerator engines i Carnot refrigerator type Perfect efrigerator eacl As ssume 2u Q Then: QHc>eH12 §15.5 The efficiency of real heat engines and refrigerator engines 1. Heat engines The efficiency of a Carnot heat engine is the maximum efficiency of a heat engine operating between the two given reservoirs. What is the most efficient heat engine or refrigerator that can operate between two given reservoirs? Prove this statement by contradiction! TC QH QC QHC QCC Proto￾type engine Assume: H QHC W Q W > Then: QHC > QH §15.5 The efficiency of real heat engines and refrigerator engines