Optimal Integration of Organic Rankine Cycles into Process Heat Exchanger Networks

This paper presents a mathematical programming model for the synthesis of an optimal heat exchanger network (HEN) in a process incorporating an organic Rankine cycle (ORC), which is used for improved heat recovery. The model is based on a modified stage-wise superstructure, where the process and ORC...

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Autores principales:	Jui-Yuan Lee, Supaluck Watanapanich, Sung-Ta Li
Formato:	article
Lenguaje:	EN
Publicado:	AIDIC Servizi S.r.l. 2021
Materias:	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895
Acceso en línea:	https://doaj.org/article/edd557f366024e24b4497476f418d165
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spelling	oai:doaj.org-article:edd557f366024e24b4497476f418d1652021-11-15T21:48:06ZOptimal Integration of Organic Rankine Cycles into Process Heat Exchanger Networks10.3303/CET21880952283-9216https://doaj.org/article/edd557f366024e24b4497476f418d1652021-11-01T00:00:00Zhttps://www.cetjournal.it/index.php/cet/article/view/11888https://doaj.org/toc/2283-9216This paper presents a mathematical programming model for the synthesis of an optimal heat exchanger network (HEN) in a process incorporating an organic Rankine cycle (ORC), which is used for improved heat recovery. The model is based on a modified stage-wise superstructure, where the process and ORC streams can exchange heat in all the stages. In addition, the evaporation and condensation temperatures of the ORC working fluid are treated as variables, and its thermodynamic properties (e.g. enthalpies and temperatures) are correlated as functions of evaporation and condensation temperatures. This allows the ORC operating conditions and the HEN to be optimised simultaneously, with the objective of maximising net power output or minimising overall energy cost. A literature example is presented to demonstrate the application of the proposed model. Results show that, besides producing shaft work, the ORC can further reduce the cold utility requirement. Furthermore, the overall energy cost can be minimised by increasing ORC power production, at the expense of increased hot and cold utility requirements. The proposed approach is thus useful in assessing the benefits from optimal ORC integration in the background process.Jui-Yuan LeeSupaluck WatanapanichSung-Ta LiAIDIC Servizi S.r.l.articleChemical engineeringTP155-156Computer engineering. Computer hardwareTK7885-7895ENChemical Engineering Transactions, Vol 88 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895
spellingShingle	Chemical engineering TP155-156 Computer engineering. Computer hardware TK7885-7895 Jui-Yuan Lee Supaluck Watanapanich Sung-Ta Li Optimal Integration of Organic Rankine Cycles into Process Heat Exchanger Networks
description	This paper presents a mathematical programming model for the synthesis of an optimal heat exchanger network (HEN) in a process incorporating an organic Rankine cycle (ORC), which is used for improved heat recovery. The model is based on a modified stage-wise superstructure, where the process and ORC streams can exchange heat in all the stages. In addition, the evaporation and condensation temperatures of the ORC working fluid are treated as variables, and its thermodynamic properties (e.g. enthalpies and temperatures) are correlated as functions of evaporation and condensation temperatures. This allows the ORC operating conditions and the HEN to be optimised simultaneously, with the objective of maximising net power output or minimising overall energy cost. A literature example is presented to demonstrate the application of the proposed model. Results show that, besides producing shaft work, the ORC can further reduce the cold utility requirement. Furthermore, the overall energy cost can be minimised by increasing ORC power production, at the expense of increased hot and cold utility requirements. The proposed approach is thus useful in assessing the benefits from optimal ORC integration in the background process.
format	article
author	Jui-Yuan Lee Supaluck Watanapanich Sung-Ta Li
author_facet	Jui-Yuan Lee Supaluck Watanapanich Sung-Ta Li
author_sort	Jui-Yuan Lee
title	Optimal Integration of Organic Rankine Cycles into Process Heat Exchanger Networks
title_short	Optimal Integration of Organic Rankine Cycles into Process Heat Exchanger Networks
title_full	Optimal Integration of Organic Rankine Cycles into Process Heat Exchanger Networks
title_fullStr	Optimal Integration of Organic Rankine Cycles into Process Heat Exchanger Networks
title_full_unstemmed	Optimal Integration of Organic Rankine Cycles into Process Heat Exchanger Networks
title_sort	optimal integration of organic rankine cycles into process heat exchanger networks
publisher	AIDIC Servizi S.r.l.
publishDate	2021
url	https://doaj.org/article/edd557f366024e24b4497476f418d165
work_keys_str_mv	AT juiyuanlee optimalintegrationoforganicrankinecyclesintoprocessheatexchangernetworks AT supaluckwatanapanich optimalintegrationoforganicrankinecyclesintoprocessheatexchangernetworks AT sungtali optimalintegrationoforganicrankinecyclesintoprocessheatexchangernetworks
_version_	1718426819847258112

Optimal Integration of Organic Rankine Cycles into Process Heat Exchanger Networks

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