Synthesis of Cost-Optimal Heat Exchanger Networks Using a Novel Stochastic Algorithm and a Modified Stage-Wised Superstructure

Facing the current energy structure urgently needs to be transformed, heat exchanger network (HEN) can implement heat recovery and cost reduction by the arrangement for heat exchanges between cold and hot streams. The plenty of integer and continuous variables involved in HEN synthesis cause the res...

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Autores principales:	Jiaxing Chen, Qiguo Yang, Guomin Cui, Zhongkai Bao, Guanhua Zhang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	accepting imperfect solutions heat exchanger network stochastic algorithm random walk algorithm with compulsive evolution stage-wised superstructure Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/7b4e67672eb04073bfdcfb9ce886d584
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spelling	oai:doaj.org-article:7b4e67672eb04073bfdcfb9ce886d5842021-11-25T18:51:53ZSynthesis of Cost-Optimal Heat Exchanger Networks Using a Novel Stochastic Algorithm and a Modified Stage-Wised Superstructure10.3390/pr91120602227-9717https://doaj.org/article/7b4e67672eb04073bfdcfb9ce886d5842021-11-01T00:00:00Zhttps://www.mdpi.com/2227-9717/9/11/2060https://doaj.org/toc/2227-9717Facing the current energy structure urgently needs to be transformed, heat exchanger network (HEN) can implement heat recovery and cost reduction by the arrangement for heat exchanges between cold and hot streams. The plenty of integer and continuous variables involved in HEN synthesis cause the results to be easily trapped in local optima. To avoid this situation, the mechanism of accepting imperfect solutions is added in a novel algorithm called Random Walk Algorithm with Compulsive Evolution. However, several potential solutions maybe abandoned by accepting imperfect solutions. To maintain the global searching ability, and at the same time, protecting the potential solutions during the optimization process, the limitations of accepting imperfect solutions are investigated in this work, then a back substitution strategy and elite optimization strategy based on algorithm are proposed. The former is to identify and adjust the inferior individuals in long-term stagnation while the latter is to keep and perform a fine search for the better solutions. Furthermore, a modified stage-wised superstructure is also developed to implement the flexible placement of utilities, which efficiently enlarges the solution domain. The validation of strategies and model is implemented by three cases, the results are lower, with 2219 $/year, 1280 $/year, and 2M $/year than the best published result, revealing the strong abilities of the proposed method in designing more economical HENs.Jiaxing ChenQiguo YangGuomin CuiZhongkai BaoGuanhua ZhangMDPI AGarticleaccepting imperfect solutionsheat exchanger networkstochastic algorithmrandom walk algorithm with compulsive evolutionstage-wised superstructureChemical technologyTP1-1185ChemistryQD1-999ENProcesses, Vol 9, Iss 2060, p 2060 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	accepting imperfect solutions heat exchanger network stochastic algorithm random walk algorithm with compulsive evolution stage-wised superstructure Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	accepting imperfect solutions heat exchanger network stochastic algorithm random walk algorithm with compulsive evolution stage-wised superstructure Chemical technology TP1-1185 Chemistry QD1-999 Jiaxing Chen Qiguo Yang Guomin Cui Zhongkai Bao Guanhua Zhang Synthesis of Cost-Optimal Heat Exchanger Networks Using a Novel Stochastic Algorithm and a Modified Stage-Wised Superstructure
description	Facing the current energy structure urgently needs to be transformed, heat exchanger network (HEN) can implement heat recovery and cost reduction by the arrangement for heat exchanges between cold and hot streams. The plenty of integer and continuous variables involved in HEN synthesis cause the results to be easily trapped in local optima. To avoid this situation, the mechanism of accepting imperfect solutions is added in a novel algorithm called Random Walk Algorithm with Compulsive Evolution. However, several potential solutions maybe abandoned by accepting imperfect solutions. To maintain the global searching ability, and at the same time, protecting the potential solutions during the optimization process, the limitations of accepting imperfect solutions are investigated in this work, then a back substitution strategy and elite optimization strategy based on algorithm are proposed. The former is to identify and adjust the inferior individuals in long-term stagnation while the latter is to keep and perform a fine search for the better solutions. Furthermore, a modified stage-wised superstructure is also developed to implement the flexible placement of utilities, which efficiently enlarges the solution domain. The validation of strategies and model is implemented by three cases, the results are lower, with 2219 $/year, 1280 $/year, and 2M $/year than the best published result, revealing the strong abilities of the proposed method in designing more economical HENs.
format	article
author	Jiaxing Chen Qiguo Yang Guomin Cui Zhongkai Bao Guanhua Zhang
author_facet	Jiaxing Chen Qiguo Yang Guomin Cui Zhongkai Bao Guanhua Zhang
author_sort	Jiaxing Chen
title	Synthesis of Cost-Optimal Heat Exchanger Networks Using a Novel Stochastic Algorithm and a Modified Stage-Wised Superstructure
title_short	Synthesis of Cost-Optimal Heat Exchanger Networks Using a Novel Stochastic Algorithm and a Modified Stage-Wised Superstructure
title_full	Synthesis of Cost-Optimal Heat Exchanger Networks Using a Novel Stochastic Algorithm and a Modified Stage-Wised Superstructure
title_fullStr	Synthesis of Cost-Optimal Heat Exchanger Networks Using a Novel Stochastic Algorithm and a Modified Stage-Wised Superstructure
title_full_unstemmed	Synthesis of Cost-Optimal Heat Exchanger Networks Using a Novel Stochastic Algorithm and a Modified Stage-Wised Superstructure
title_sort	synthesis of cost-optimal heat exchanger networks using a novel stochastic algorithm and a modified stage-wised superstructure
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/7b4e67672eb04073bfdcfb9ce886d584
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Synthesis of Cost-Optimal Heat Exchanger Networks Using a Novel Stochastic Algorithm and a Modified Stage-Wised Superstructure

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