Analyses of the endoreversible Carnot cycle with entropy theory and entransy theory

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The endoreversible Carnot cycle is analyzed based on the concepts of entropy generation,entropy generation number,entransy loss,and entransy loss coefficient.The relationships of the cycle output power and heat-work conversion efficiency with these parameters are discussed.For the numerical examples discussed,the preconditions of the application for these concepts are derived.When the inlet temperatures and heat capacity flow rates of hot streams and environment temperature are prescribed,the results show that the concepts of entropy generation and entransy loss are applicable.However,in the presence of various inlet temperatures of streams,larger entransy loss rate still leads to larger output power,while smaller entropy generation rate does not.When the heat capacity flow rates of hot streams are various,neither larger entransy loss rate nor smaller entropy generation rate always leads to larger output power.Larger entransy loss coefficient always leads to larger heat-work conversion efficiency for the cases discussed,while smaller entropy generation number does not always. The endoreversible Carnot cycle is based on the concepts of entropy generation, entropy generation number, entransy loss, and entransy loss coefficient. The relationships of the cycle output power and heat-work conversion efficiency with these parameters are discussed. For the numerical example discussed , the preconditions of the application for these concepts are derived. At the inlet temperatures and heat capacity flow rates of hot streams and environment temperatures are prescribed, the results show that the concepts of entropy generation and entransy loss are applicable. However, in the presence of various inlet temperatures of streams, larger entransy loss rate still leads to larger output power, while smaller entropy generation rate does not .When the heat capacity flow rates of hot streams are various, neither larger entransy loss rate nor smaller entropy generation rate always leads to increase output power. Larger entransy loss coefficient always leads to larger heat-work conversion efficiency for the cases discussed, while smaller entropy generation number does not always.
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