Abstract
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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References
Webb R L. Principles of Enhanced Heat Transfer. New York: John Wiley & Sons, 1994
Bergles A E. Some perspectives on enhanced heat transfer-second generation heat transfer technology. J Heat Trans-T ASME, 1988, 110(4B): 1082–1096
Bergles A E. Heat transfer enhancement-the encouragement and accommodation of high heat fluxes. J Heat Trans-T ASME, 1997, 119(1): 8–19
Bejan A. A study of entropy generation in fundamental convective heat transfer. J Heat Trans-T ASME, 1979, 101(4): 718–725
Bejan A. Entropy Generation through Heat and Fluid Flow. New York: John Wiley & Sons, 1982
Nag P K, Mukherjee P. Thermodynamic optimization of convective heat transfer through a duct with constant wall temperature. Int J Heat Mass Tran, 1987, 30(2): 401–405
Ogulata R T, Doba F. Experiments and entropy generation minimization analysis of a cross-flow heat exchanger. Int J Heat Mass Tran, 1998, 41(2): 373–381
Hesselgreaves J E. Rationalisation of second law analysis of heat exchangers. Int J Heat Mass Tran, 2000, 43(22): 4189–4204
Saouli S, Aiboud-Saouli S. Second law analysis of laminar falling liquid film along an inclined heated plate. Int Comm Heat Mass Tran, 2004, 31(6): 879–886
Ko T H. A numerical study on entropy generation and optimization for laminar forced convection in a rectangular curved duct with longitudinal ribs. Int J Therm Sci, 2006, 45(11): 1113–1125
Erek A, Dincer I. An approach to entropy analysis of a latent heat storage module. Int J Therm Sci, 2008, 47(8): 1077–1085
Guo Z Y, Zhu H Y, Liang X G. Entransy-A physical quantity describing heat transfer ability. Int J Heat Mass Tran, 2007, 50(13–14): 2545–2556
Guo Z Y, Cheng X G, Xia Z Z. Least dissipation principle to heat transport potential capacity and its application in heat conduction optimization. Chin Sci Bull, 2003, 48(4): 406–410
Meng J A, Liang X G, Li Z X. Field synergy optimization and enhanced heat transfer by multi-longitudinal vortices flow in tube. Int J Heat Mass Tran, 2005, 48(16): 3331–3337
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Supported by National Key Fundamental R&D Program of China (Grant No. G2007CB206901)
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Chen, Q., Ren, J. Generalized thermal resistance for convective heat transfer and its relation to entransy dissipation. Chin. Sci. Bull. 53, 3753–3761 (2008). https://doi.org/10.1007/s11434-008-0526-8
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DOI: https://doi.org/10.1007/s11434-008-0526-8