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Das S.,CUNY - College of Staten Island | Razelos P.,Institute of Thermal science
ASME International Mechanical Engineering Congress and Exposition, Proceedings | Year: 2010

Extended surfaces, referred in the literature as fins, are usually metallic strips of different shapes and forms. These fins are attached to a primary surface of a structure, for the specific purpose of enhancing the heat transfer between the surface and the surrounding ambient fluid. For the last sixty three years, fins have attracted considerable attention and a vast literature exists on this subject. The aim of this study is to portray the analysis and optimization of rectangular longitudinal and pin fins of cylindrical cross sections. For this purpose a new method of analyzing fins is briefly discussed. Herein, specifically we examine the analysis and optimization of longitudinal fins with linear, exponential and other forms of space variable heal: transfer coefficients taken from the existing literature. For pin fins, we examine the case where the heat transfer coefficient depends on the pin fin's diameter. The results from the optimization process are presented in a concise fashion with practical examples. Copyright © 2010 by ASME.


Du W.-J.,Institute of Thermal Science | Xin G.-M.,Institute of Thermal Science | Wang F.,Institute of Thermal Science | Cheng L.,Institute of Thermal Science
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | Year: 2011

The power distribution system (PDS) in the AMS-02 is investigated in this paper for the purpose of dealing with its locally high temperature issue and further obtaining an efficient thermal control system. Faced with such a typical volume-point heat dissipation problem, much numerical simulation is carried out to find the construct of heat pipes in the PDS baseplate based on the principle biological evolution. Experimental researches are performed in order to testify the validity of numerical simulation model and to verify the bionic optimization method. Results obtained in this paper also support that heat pipes are especially useful in the thermal control system design on the aspect of averaging temperature distribution.

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