Conventional and advanced exergy analyses of an organic Rankine cycle by using the thermodynamic cycle approach

Abstract In this study, a basic organic Rankine cycle (ORC) is introduced in an air separation process for waste heat recovery. Conventional and advanced exergy analyses are adopted to investigate the thermodynamic properties of components in the ORC. A comprehensive thermodynamic model is construct...

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Autores principales:	Yi Wang, Guoliang Qin, Yong Zhang, Shuhua Yang, Changsheng Liu, Cheng Jia, Qin Cui
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	advanced exergy analysis multiple working fluids organic Rankine cycle performance improvement Technology T Science Q
Acceso en línea:	https://doaj.org/article/51c2035c9b634ad29aad9cd752882e3c
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spelling	oai:doaj.org-article:51c2035c9b634ad29aad9cd752882e3c2021-12-02T05:24:30ZConventional and advanced exergy analyses of an organic Rankine cycle by using the thermodynamic cycle approach2050-050510.1002/ese3.980https://doaj.org/article/51c2035c9b634ad29aad9cd752882e3c2021-12-01T00:00:00Zhttps://doi.org/10.1002/ese3.980https://doaj.org/toc/2050-0505Abstract In this study, a basic organic Rankine cycle (ORC) is introduced in an air separation process for waste heat recovery. Conventional and advanced exergy analyses are adopted to investigate the thermodynamic properties of components in the ORC. A comprehensive thermodynamic model is constructed to improve the advanced exergy analysis in the ORC, thereby encompassing real, theoretical, unavoidable, and hybrid cycles. Nine organic working fluids are introduced to investigate the influence on the ORC performance. (1) The conventional exergy analysis reveals the following: (a) The expander constantly demonstrates the maximum exergy efficiency except when R227ea is used. (b) The evaporator constantly exhibits the maximum exergy destruction regardless of the working fluid used. (c) The maximum product exergy is obtained when R114 is used. (d) Key components must focus on the condenser and evaporator to improve the ORC performance. (2) The advanced exergy analysis reveals that the expander demonstrates maximum potential for improvement because its endogenous avoidable exergy destruction accounts for approximately 90% of its real exergy destruction for all working fluids. The expander must be improved to achieve the optimal ORC performance. The advanced exergy analysis can distinguish the source of exergy destruction and the magnitude for possible improvement via the proposed thermodynamic model in this study. The comprehensive thermodynamic model can promote the investigation of the advanced exergy analysis in the ORC. Applying conventional and advanced exergy analyses to investigate the thermodynamic performance of a system or its components is highly recommended.Yi WangGuoliang QinYong ZhangShuhua YangChangsheng LiuCheng JiaQin CuiWileyarticleadvanced exergy analysismultiple working fluidsorganic Rankine cycleperformance improvementTechnologyTScienceQENEnergy Science & Engineering, Vol 9, Iss 12, Pp 2474-2492 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	advanced exergy analysis multiple working fluids organic Rankine cycle performance improvement Technology T Science Q
spellingShingle	advanced exergy analysis multiple working fluids organic Rankine cycle performance improvement Technology T Science Q Yi Wang Guoliang Qin Yong Zhang Shuhua Yang Changsheng Liu Cheng Jia Qin Cui Conventional and advanced exergy analyses of an organic Rankine cycle by using the thermodynamic cycle approach
description	Abstract In this study, a basic organic Rankine cycle (ORC) is introduced in an air separation process for waste heat recovery. Conventional and advanced exergy analyses are adopted to investigate the thermodynamic properties of components in the ORC. A comprehensive thermodynamic model is constructed to improve the advanced exergy analysis in the ORC, thereby encompassing real, theoretical, unavoidable, and hybrid cycles. Nine organic working fluids are introduced to investigate the influence on the ORC performance. (1) The conventional exergy analysis reveals the following: (a) The expander constantly demonstrates the maximum exergy efficiency except when R227ea is used. (b) The evaporator constantly exhibits the maximum exergy destruction regardless of the working fluid used. (c) The maximum product exergy is obtained when R114 is used. (d) Key components must focus on the condenser and evaporator to improve the ORC performance. (2) The advanced exergy analysis reveals that the expander demonstrates maximum potential for improvement because its endogenous avoidable exergy destruction accounts for approximately 90% of its real exergy destruction for all working fluids. The expander must be improved to achieve the optimal ORC performance. The advanced exergy analysis can distinguish the source of exergy destruction and the magnitude for possible improvement via the proposed thermodynamic model in this study. The comprehensive thermodynamic model can promote the investigation of the advanced exergy analysis in the ORC. Applying conventional and advanced exergy analyses to investigate the thermodynamic performance of a system or its components is highly recommended.
format	article
author	Yi Wang Guoliang Qin Yong Zhang Shuhua Yang Changsheng Liu Cheng Jia Qin Cui
author_facet	Yi Wang Guoliang Qin Yong Zhang Shuhua Yang Changsheng Liu Cheng Jia Qin Cui
author_sort	Yi Wang
title	Conventional and advanced exergy analyses of an organic Rankine cycle by using the thermodynamic cycle approach
title_short	Conventional and advanced exergy analyses of an organic Rankine cycle by using the thermodynamic cycle approach
title_full	Conventional and advanced exergy analyses of an organic Rankine cycle by using the thermodynamic cycle approach
title_fullStr	Conventional and advanced exergy analyses of an organic Rankine cycle by using the thermodynamic cycle approach
title_full_unstemmed	Conventional and advanced exergy analyses of an organic Rankine cycle by using the thermodynamic cycle approach
title_sort	conventional and advanced exergy analyses of an organic rankine cycle by using the thermodynamic cycle approach
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/51c2035c9b634ad29aad9cd752882e3c
work_keys_str_mv	AT yiwang conventionalandadvancedexergyanalysesofanorganicrankinecyclebyusingthethermodynamiccycleapproach AT guoliangqin conventionalandadvancedexergyanalysesofanorganicrankinecyclebyusingthethermodynamiccycleapproach AT yongzhang conventionalandadvancedexergyanalysesofanorganicrankinecyclebyusingthethermodynamiccycleapproach AT shuhuayang conventionalandadvancedexergyanalysesofanorganicrankinecyclebyusingthethermodynamiccycleapproach AT changshengliu conventionalandadvancedexergyanalysesofanorganicrankinecyclebyusingthethermodynamiccycleapproach AT chengjia conventionalandadvancedexergyanalysesofanorganicrankinecyclebyusingthethermodynamiccycleapproach AT qincui conventionalandadvancedexergyanalysesofanorganicrankinecyclebyusingthethermodynamiccycleapproach
_version_	1718400409904611328

Conventional and advanced exergy analyses of an organic Rankine cycle by using the thermodynamic cycle approach

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