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Optimization of a circular microchannel heat sink using entropy generation minimization method

New advances in micro and nano scales are being realized and the contributions of micro and nano heat dissipation devices are of high importance in this novel technology development. Past studies showed that microchannel design depends on its thermal resistance and pressure drop. However, entropy ge...

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Main Author: Jafari, Arash
Format: Thesis
Language:English
Published: 2009
Subjects:
TJ Mechanical engineering and machinery
Online Access:http://eprints.utm.my/id/eprint/10014/1/ArashJafariMFKM2009.pdf
http://eprints.utm.my/id/eprint/10014/
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spelling my.utm.100142018-06-13T07:08:02Z http://eprints.utm.my/id/eprint/10014/ Optimization of a circular microchannel heat sink using entropy generation minimization method Jafari, Arash TJ Mechanical engineering and machinery New advances in micro and nano scales are being realized and the contributions of micro and nano heat dissipation devices are of high importance in this novel technology development. Past studies showed that microchannel design depends on its thermal resistance and pressure drop. However, entropy generation minimization (EGM) as a new optimization theory stated that the rate of entropy generation should be also optimized. Application of EGM in microchannel heat sink design is reviewed and discussed. Using EGM, majority of the published investigations are conducted based on rectangular cross section microchannel. Latest principles for deriving the entropy generation correlations are discussed to present how this approach can be achieved. The present study involves an optimization procedure using EGM method and derives the entropy generation rate in circular microchannel heat sink based upon thermal resistance and pressure drop simultaneously. The equations are solved using MATLAB and the obtained results are compared to the past studies. The effect of channel diameter and number of channels on the entropy generation rate, Reynolds number, thermal resistance and pressure drop is investigated. Analytical correlations are utilized for heat transfer and friction coefficients. A minimum entropy generation has been observed for N=40 and channel diameter of 9090µm. It is concluded that for N=40 and channel hydraulic diameter of 9090µm, the circular microchannel heat sink is on its optimum operating point based on second law of thermodynamics. 2009-05 Thesis NonPeerReviewed application/pdf en http://eprints.utm.my/id/eprint/10014/1/ArashJafariMFKM2009.pdf Jafari, Arash (2009) Optimization of a circular microchannel heat sink using entropy generation minimization method. Masters thesis, Universiti Teknologi Malaysia, Faculty of Mechanical Engineering.
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
language English
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Jafari, Arash
Optimization of a circular microchannel heat sink using entropy generation minimization method
description New advances in micro and nano scales are being realized and the contributions of micro and nano heat dissipation devices are of high importance in this novel technology development. Past studies showed that microchannel design depends on its thermal resistance and pressure drop. However, entropy generation minimization (EGM) as a new optimization theory stated that the rate of entropy generation should be also optimized. Application of EGM in microchannel heat sink design is reviewed and discussed. Using EGM, majority of the published investigations are conducted based on rectangular cross section microchannel. Latest principles for deriving the entropy generation correlations are discussed to present how this approach can be achieved. The present study involves an optimization procedure using EGM method and derives the entropy generation rate in circular microchannel heat sink based upon thermal resistance and pressure drop simultaneously. The equations are solved using MATLAB and the obtained results are compared to the past studies. The effect of channel diameter and number of channels on the entropy generation rate, Reynolds number, thermal resistance and pressure drop is investigated. Analytical correlations are utilized for heat transfer and friction coefficients. A minimum entropy generation has been observed for N=40 and channel diameter of 9090µm. It is concluded that for N=40 and channel hydraulic diameter of 9090µm, the circular microchannel heat sink is on its optimum operating point based on second law of thermodynamics.
format Thesis
author Jafari, Arash
author_facet Jafari, Arash
author_sort Jafari, Arash
title Optimization of a circular microchannel heat sink using entropy generation minimization method
title_short Optimization of a circular microchannel heat sink using entropy generation minimization method
title_full Optimization of a circular microchannel heat sink using entropy generation minimization method
title_fullStr Optimization of a circular microchannel heat sink using entropy generation minimization method
title_full_unstemmed Optimization of a circular microchannel heat sink using entropy generation minimization method
title_sort optimization of a circular microchannel heat sink using entropy generation minimization method
publishDate 2009
url http://eprints.utm.my/id/eprint/10014/1/ArashJafariMFKM2009.pdf
http://eprints.utm.my/id/eprint/10014/
_version_ 1643645303810686976
score 13.211869

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