储热技术基础（Ⅲ）-等效换热因子及其在储热过程优化中的应用

摘要

基于热力学第二定律和夹点理论，提出评价换热过程性能的参数——等效换热因子，指出该参数不同于热力学状态参数。通过储热过程优化实例说明，由于考虑实际换热过程，该因子可更有效地评价换热性能。%Based on the second law of thermodynamics and pinch theory,a new parameter named effective heat transfer factor (EHTF) is introduced to evaluate the performance of heat transfer processes. By using such a parameter for process optimization of a heat storage system, it is found that the EHTF is a much better indicator for heat transfer assessment as it considers not only state parameters but also processes.