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Optimization of microchannel heat sinks using entropy generation minimization method

In this study, an entropy generation minimization (EGM) procedure is employed to optimize the overall performance of microchannel heat sinks. This allows the combined effects of thermal resistance and pressure drop to be assessed simultaneously as the heat sink interacts with the surrounding flow fi...

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Main Authors:	Khan, W.A., Yovanovich, M.M., Culham, J.R.
Format:	Conference Proceeding
Language:	English
Subjects:	Entropy Genetic expression Heat sinks Heat transfer Microchannel Minimization methods Optimization methods Resistance heating Thermal resistance Weight control
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creator	Khan, W.A. Yovanovich, M.M. Culham, J.R.
description	In this study, an entropy generation minimization (EGM) procedure is employed to optimize the overall performance of microchannel heat sinks. This allows the combined effects of thermal resistance and pressure drop to be assessed simultaneously as the heat sink interacts with the surrounding flow field. New general expressions for the entropy generation rate are developed by considering an appropriate control volume and applying mass, energy, and entropy balances. The effect of channel aspect ratio, fin spacing ratio, heat sink material, Knudsen numbers and accommodation coefficients on the entropy generation rate is investigated in the slip flow region. Analytical/empirical correlations are used for heat transfer and friction coefficients, where the characteristic length is used as the hydraulic diameter of the channel. A parametric study is also performed to show the effects of different design variables on the overall performance of microchannel heat sinks
doi_str_mv	10.1109/STHERM.2006.1625210
format	conference_proceeding
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This allows the combined effects of thermal resistance and pressure drop to be assessed simultaneously as the heat sink interacts with the surrounding flow field. New general expressions for the entropy generation rate are developed by considering an appropriate control volume and applying mass, energy, and entropy balances. The effect of channel aspect ratio, fin spacing ratio, heat sink material, Knudsen numbers and accommodation coefficients on the entropy generation rate is investigated in the slip flow region. Analytical/empirical correlations are used for heat transfer and friction coefficients, where the characteristic length is used as the hydraulic diameter of the channel. A parametric study is also performed to show the effects of different design variables on the overall performance of microchannel heat sinks</abstract><pub>IEEE</pub><doi>10.1109/STHERM.2006.1625210</doi><tpages>9</tpages></addata></record>
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ispartof	Twenty-Second Annual IEEE Semiconductor Thermal Measurement And Management Symposium, 2006, p.78-86
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source	IEEE Electronic Library (IEL) Conference Proceedings
subjects	Entropy Genetic expression Heat sinks Heat transfer Microchannel Minimization methods Optimization methods Resistance heating Thermal resistance Weight control
title	Optimization of microchannel heat sinks using entropy generation minimization method
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