Comparative study on constructal optimizations of T-shaped fin based on entransy dissipation rate minimization and maximum thermal resistance minimization

2011 ◽  
Vol 54 (5) ◽  
pp. 1249-1258 ◽  
Author(s):  
ZhiHui Xie ◽  
LinGen Chen ◽  
FengRui Sun
Keyword(s):  
Comparative Study ◽  
Thermal Resistance ◽  
Dissipation Rate ◽  
Entransy Dissipation ◽  
Entransy Dissipation Rate ◽  
Maximum Thermal Resistance

scholarly journals Constructal Equivalent Thermal Resistance Minimization for Tau-Shaped Fin

Entropy ◽  
2020 ◽  
Vol 22 (11) ◽  
pp. 1206
Author(s):  
Shuhuan Wei ◽  
Huijun Feng ◽  
Lingen Chen ◽  
Yanlin Ge
Keyword(s):  
Thermal Resistance ◽  
Heat Transfer Performance ◽  
Constructal Theory ◽  
Width Ratio ◽  
Entransy Dissipation ◽  
Optimal Length ◽  
Entransy Theory ◽  
Engineering Designs ◽  
Material Volume ◽  
Maximum Thermal Resistance

With the aid of constructal theory and entransy theory, a Tau-shaped fin (TAUSF) is investigated in this paper, and the widths of the bend end and elemental fins are assumed to be different. The construct of the TAUSF is optimized by the minimum equivalent thermal resistance (ETR) obtained by entransy dissipation rate. The constraints of total enveloping volume and fin material volume are considered. The results show that in the specified range of width ratio, the twice minimum ETR of the TAUSF can be yielded by an optimal width ratio and an optimal length ratio. In addition, comparing the optimal performance of the TAUSF with the counterpart of a T-shaped fin, the former sacrifices a small amount of heat transfer performance and its stiffness increases due to its structure with the bend end. The optimal structure of the TAUSF yielded from ETR minimization is conspicuously different with the counterpart yielded from maximum thermal resistance minimization. Comparing the thermal performances of the two optimal constructs, the ETR of the former optimal construct is declined by 10.58%, whereas the maximum thermal resistance is augmented by 5.22%. The former optimal construct can lead to the uniformity of temperature gradient and the reduction in thermal stress, and can guide the engineering designs of practical fins.

scholarly journals Constructal entransy dissipation rate minimization of a disc on micro and nanoscales

2013 ◽  
Vol 62 (13) ◽  
pp. 134401
Author(s):  
Chen Lin-Gen ◽  
Feng Hui-Jun ◽  
Xie Zhi-Hui ◽  
Sun Feng-Rui
Keyword(s):  
Dissipation Rate ◽  
Entransy Dissipation ◽  
Entransy Dissipation Rate

Optimization of Horizontal Plate Fin Heat Sink in Natural Convection for Electronics Cooling by Simulated Annealing Algorithm

2014 ◽  
Vol 1022 ◽  
pp. 91-95 ◽  
Author(s):  
Li Zhou ◽  
Yang Liu
Keyword(s):  
Simulated Annealing ◽  
Heat Source ◽  
Entropy Generation ◽  
Heat Sink ◽  
Dissipation Rate ◽  
Geometry Optimization ◽  
Horizontal Plate ◽  
Entransy Dissipation ◽  
Source Temperature ◽  
Entransy Dissipation Rate

In this study, the simulated annealing (SA) algorithm was adopted to optimize the geometry of horizontal plate fin heat sink by the extreme entransy dissipation principle. The alculation of the entransy dissipation rate was presented in detail. Using the entransy dissipation rate as the objective condition, the geometry optimization of the fin heat sink was conducted. To verify the results, the heat source temperature and the entropy generation rate were also calculated in the procedure. It is found that the entrasy dissipation rate, entropy generation and heat source temperature have the similar trend. The extreme entransy dissipation principle and minimization of entropy generation play similar roles in the geometry optimization of plate fin heat sink.

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