A new optimal design approach for plate-fin heat exchangers by evolutionary computation

Plate-fin heat exchangers (PFHEs) are extensively implemented in practical applications due to their superior compactness and comparatively good heat transfer rate. Nevertheless, the desired high performance and relatively low weight is connected to high pressure drops that consequently result in ad...

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Main Author:	Yousefi, Moslem
Format:	Thesis
Language:	English
Published:	2013
Subjects:	T Technology (General)
Online Access:	http://eprints.utm.my/id/eprint/37903/5/MoslemYousefiPFKM2013.pdf
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id	my-utm-ep.37903
record_format	uketd_dc
spelling	my-utm-ep.379032017-07-23T06:27:00Z A new optimal design approach for plate-fin heat exchangers by evolutionary computation 2013-03 Yousefi, Moslem T Technology (General) Plate-fin heat exchangers (PFHEs) are extensively implemented in practical applications due to their superior compactness and comparatively good heat transfer rate. Nevertheless, the desired high performance and relatively low weight is connected to high pressure drops that consequently result in additional costs. Hence, the design task of PFHEs for industrial applications is an intricate process. To overcome the existing difficulties, this research presents a novel evolutionary-based approach for design optimization of PFHEs based on variable operating conditions instead of the conventional constant heat duty over the working period of the heat exchangers. To find the best suited evolutionary algorithm (EA) for the problem at hand, various widely used EAs are modified and tested on several practical problems. Moreover, since the heat exchanger design optimization is a highly constrained problem and the EAs are not equipped with constraint handling capabilities, conventional external strategies such as penalty function methods have been employed for this problem. The fine-tuning of the penalty parameters have been a drawback of using these methods, therefore a novel feasibility-based ranking strategy is proposed and utilized in the existing EAs. Using the proposed constrained EAs, the design of the PFHEs is presented based on entropy generation minimization (EGM) and economic considerations. Cross-flow PFHEs with offset strip fins on both sides are considered while method and the correlations available in the literature are employed for rating the heat exchangers. Illustrative case studies from literature are considered to show the efficiency and the accuracy of the proposed methods. The results of numerical tests show that the proposed approach finds the optimal design of PFHEs with superior accuracy and success rate in comparison with the available solutions in the literature. 2013-03 Thesis http://eprints.utm.my/id/eprint/37903/ http://eprints.utm.my/id/eprint/37903/5/MoslemYousefiPFKM2013.pdf application/pdf en public phd doctoral Universiti Teknologi Malaysia, Faculty of Mechanical Engineering Faculty of Mechanical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	T Technology (General)
spellingShingle	T Technology (General) Yousefi, Moslem A new optimal design approach for plate-fin heat exchangers by evolutionary computation
description	Plate-fin heat exchangers (PFHEs) are extensively implemented in practical applications due to their superior compactness and comparatively good heat transfer rate. Nevertheless, the desired high performance and relatively low weight is connected to high pressure drops that consequently result in additional costs. Hence, the design task of PFHEs for industrial applications is an intricate process. To overcome the existing difficulties, this research presents a novel evolutionary-based approach for design optimization of PFHEs based on variable operating conditions instead of the conventional constant heat duty over the working period of the heat exchangers. To find the best suited evolutionary algorithm (EA) for the problem at hand, various widely used EAs are modified and tested on several practical problems. Moreover, since the heat exchanger design optimization is a highly constrained problem and the EAs are not equipped with constraint handling capabilities, conventional external strategies such as penalty function methods have been employed for this problem. The fine-tuning of the penalty parameters have been a drawback of using these methods, therefore a novel feasibility-based ranking strategy is proposed and utilized in the existing EAs. Using the proposed constrained EAs, the design of the PFHEs is presented based on entropy generation minimization (EGM) and economic considerations. Cross-flow PFHEs with offset strip fins on both sides are considered while method and the correlations available in the literature are employed for rating the heat exchangers. Illustrative case studies from literature are considered to show the efficiency and the accuracy of the proposed methods. The results of numerical tests show that the proposed approach finds the optimal design of PFHEs with superior accuracy and success rate in comparison with the available solutions in the literature.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Yousefi, Moslem
author_facet	Yousefi, Moslem
author_sort	Yousefi, Moslem
title	A new optimal design approach for plate-fin heat exchangers by evolutionary computation
title_short	A new optimal design approach for plate-fin heat exchangers by evolutionary computation
title_full	A new optimal design approach for plate-fin heat exchangers by evolutionary computation
title_fullStr	A new optimal design approach for plate-fin heat exchangers by evolutionary computation
title_full_unstemmed	A new optimal design approach for plate-fin heat exchangers by evolutionary computation
title_sort	new optimal design approach for plate-fin heat exchangers by evolutionary computation
granting_institution	Universiti Teknologi Malaysia, Faculty of Mechanical Engineering
granting_department	Faculty of Mechanical Engineering
publishDate	2013
url	http://eprints.utm.my/id/eprint/37903/5/MoslemYousefiPFKM2013.pdf
_version_	1747816510114496512

A new optimal design approach for plate-fin heat exchangers by evolutionary computation

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