Optimal performance of endoreversible cycles for another linear heat transfer law

Abstract

Optimal performance of endoreversible cycles is studied systematically based on another linear heat transfer law (the heat-flux q varies as Delta (1/T)) in irreversible thermodynamics instead of Newton's law. First, a fundamental optimum formula for endoreversible cycles is derived by using a three-heat-source cycle model. Then, the formula is used to deduce the performance bounds of various endoreversible cycles. Some new results are obtained. These results are compared with those obtained by using Newton's law. Consequently, the common characters and the main differences of an endoreversible cycle for the two linear heat transfer laws are expounded. Finally, the effect of finiteness of the high-temperature heat source on the optimal performance of an endoreversible cycle for the two linear heat transfer laws is discussed.