Application of entransy dissipation extremum principle in radiative heat transfer optimization  

作　　者：Jing Wu XinGang Liang 

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

出　　处：《Science China(Technological Sciences)》2008年第8期1306-1314,共9页中国科学（技术科学英文版）

基　　金：Supported by the National Basic Research Program of China ("973" Project) (Grant No. 2007CB206901)

摘　　要：The concepts of entransy flux and entransy dissipation in radiative heat transfer were introduced based on the analogy with heat conduction and heat convection processes. Entransy will be partially dissipated during the radiative heat transfer processes due to the irreversibility. The extremum principle of entransy dissipation was developed for optimizing radiative heat transfer processes. This principle states that for a fixed boundary temperature the radiative heat transfer is optimized when the entransy dissipation is maximized, while for a fixed boundary heat flux the radiative heat transfer process is optimized when the entransy dissipation is minimized. Finally, examples for the application of the entransy dissipation extre- mum principle are presented.The concepts of entransy flux and entransy dissipation in radiative heat transfer were introduced based on the analogy with heat conduction and heat convection processes. Entransy will be partially dissipated during the radiative heat transfer processes due to the irreversibility. The extremum principle of entransy dissipation was developed for optimizing radiative heat transfer processes. This principle states that for a fixed boundary temperature the radiative heat transfer is optimized when the entransy dissipation is maximized, while for a fixed boundary heat flux the radiative heat transfer process is optimized when the entransy dissipation is minimized. Finally, examples for the application of the entransy dissipation extremum principle are presented.

关 键 词：extremum PRINCIPLE of entransy DISSIPATION RADIATIVE HEAT TRANSFER OPTIMIZATION 

分 类 号：TK124[动力工程及工程热物理—工程热物理]