期刊
CHINESE SCIENCE BULLETIN
卷 53, 期 23, 页码 3753-3761出版社
SCIENCE PRESS
DOI: 10.1007/s11434-008-0526-8
关键词
convective heat transfer; generalized thermal resistance; entransy dissipation; heat flux weighted average temperature difference
资金
- National Key Fundamental R & D Program of China [G2007CB206901]
In order to further analyze and optimize convective heat transfer process further, the concepts of heat flux weighted average heat temperature and heat flux weighted average heat temperature difference in multi-dimensional heat transfer system were introduced in this paper. The ratio of temperature difference to heat flux is defined as the generalized thermal resistance of convective heat transfer processes, and then the minimum thermal resistance theory for convective heat transfer optimization was developed. By analyzing the relationship between generalized thermal resistance and entansy dissipation in convective heat transfer processes, it can be concluded that the minimum thermal resistance theory equals the entransy dissipation extremum theory. Finally, a two-dimensional convective heat transfer process with constant wall temperature is taken as an example to illustrate the applicability of generalized thermal resistance to convective heat transfer process analysis and optimization.
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