Optimization of heat transfer and heat-work conversion based on generalized heat transfer law  

作　　者：CHENG XueTao WANG WenHua LIANG XinGang 

机构地区：[1]Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Department of Engineering Mechanics,Tsinghua University,Beijing 100084,China

出　　处：《Science China(Technological Sciences)》2012年第10期2847-2855,共9页中国科学（技术科学英文版）

基　　金：supported by the Natural Science Foundation of China(Grant No. 51136001);the Tsinghua University Initiative ScientificResearch Program

摘　　要：Examples of heat transfer and heat-work conversion are optimized with entropy generation and entransy loss,respectively based on the generalized heat transfer law in this paper.The applicability of entropy generation and entransy loss evaluation in these optimization problems is analyzed and discussed.The results show that the entransy loss rate reduces to the entransy dissipation rate in heat transfer processes,and that the entransy loss evaluation is effective for heat transfer optimization.However,the maximum heat transfer rate does not correspond to the minimum entropy generation rate with prescribed heat transfer temperature difference,which indicates that the entropy generation minimization is not always appropriate to heat transfer optimization.For heat-work conversion processes,the maximum entransy loss rate and the minimum entropy generation rate both correspond to the maximum output power,and they are both appropriate to the optimization of the heat-work conversion processes discussed in this paper.

关 键 词：entransy loss entropy generation generalized heat transfer law heat transfer optimization heat-work conversion optimization 

分 类 号：TK123[动力工程及工程热物理—工程热物理] O224[动力工程及工程热物理—热能工程]