Exergy Analysis of Coal-Based Series Polygeneration Systems for Methanol and Electricity Co-Production

This paper quantifies the exergy losses of coal-based series polygeneration systems and evaluates the potential efficiency improvements that can be realized by applying advanced technologies for gasification, methanol synthesis, and combined cycle power generation. Exergy analysis identified exergy...

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Autores principales:	Jianyun Zhang, Zhiwei Yang, Linwei Ma, Weidou Ni
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	coal polygeneration methanol power exergy Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/79e026cf3cae45e694900dc5b73a02ac
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spelling	oai:doaj.org-article:79e026cf3cae45e694900dc5b73a02ac2021-11-11T18:38:19ZExergy Analysis of Coal-Based Series Polygeneration Systems for Methanol and Electricity Co-Production10.3390/molecules262166731420-3049https://doaj.org/article/79e026cf3cae45e694900dc5b73a02ac2021-11-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/21/6673https://doaj.org/toc/1420-3049This paper quantifies the exergy losses of coal-based series polygeneration systems and evaluates the potential efficiency improvements that can be realized by applying advanced technologies for gasification, methanol synthesis, and combined cycle power generation. Exergy analysis identified exergy losses and their associated causes from chemical and physical processes. A new indicator was defined to evaluate the potential gain from minimizing exergy losses caused by physical processes—the degree of perfection of the system’s thermodynamic performance. The influences of a variety of advanced technical solutions on exergy improvement were analyzed and compared. It was found that the overall exergy loss of a series polygeneration system can be reduced significantly, from 57.4% to 48.9%, by applying all the advanced technologies selected. For gasification, four advanced technologies were evaluated, and the largest reduction in exergy loss (about 2.5 percentage points) was contributed by hot gas cleaning, followed by ion transport membrane technology (1.5 percentage points), slurry pre-heating (0.91 percentage points), and syngas heat recovery (0.6 percentage points). For methanol synthesis, partial shift technology reduced the overall exergy loss by about 1.4 percentage points. For power generation, using a G-class gas turbine decreased the overall exergy loss by about 1.6 percentage points.Jianyun ZhangZhiwei YangLinwei MaWeidou NiMDPI AGarticlecoalpolygenerationmethanolpowerexergymethanolOrganic chemistryQD241-441ENMolecules, Vol 26, Iss 6673, p 6673 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	coal polygeneration methanol power exergy methanol Organic chemistry QD241-441
spellingShingle	coal polygeneration methanol power exergy methanol Organic chemistry QD241-441 Jianyun Zhang Zhiwei Yang Linwei Ma Weidou Ni Exergy Analysis of Coal-Based Series Polygeneration Systems for Methanol and Electricity Co-Production
description	This paper quantifies the exergy losses of coal-based series polygeneration systems and evaluates the potential efficiency improvements that can be realized by applying advanced technologies for gasification, methanol synthesis, and combined cycle power generation. Exergy analysis identified exergy losses and their associated causes from chemical and physical processes. A new indicator was defined to evaluate the potential gain from minimizing exergy losses caused by physical processes—the degree of perfection of the system’s thermodynamic performance. The influences of a variety of advanced technical solutions on exergy improvement were analyzed and compared. It was found that the overall exergy loss of a series polygeneration system can be reduced significantly, from 57.4% to 48.9%, by applying all the advanced technologies selected. For gasification, four advanced technologies were evaluated, and the largest reduction in exergy loss (about 2.5 percentage points) was contributed by hot gas cleaning, followed by ion transport membrane technology (1.5 percentage points), slurry pre-heating (0.91 percentage points), and syngas heat recovery (0.6 percentage points). For methanol synthesis, partial shift technology reduced the overall exergy loss by about 1.4 percentage points. For power generation, using a G-class gas turbine decreased the overall exergy loss by about 1.6 percentage points.
format	article
author	Jianyun Zhang Zhiwei Yang Linwei Ma Weidou Ni
author_facet	Jianyun Zhang Zhiwei Yang Linwei Ma Weidou Ni
author_sort	Jianyun Zhang
title	Exergy Analysis of Coal-Based Series Polygeneration Systems for Methanol and Electricity Co-Production
title_short	Exergy Analysis of Coal-Based Series Polygeneration Systems for Methanol and Electricity Co-Production
title_full	Exergy Analysis of Coal-Based Series Polygeneration Systems for Methanol and Electricity Co-Production
title_fullStr	Exergy Analysis of Coal-Based Series Polygeneration Systems for Methanol and Electricity Co-Production
title_full_unstemmed	Exergy Analysis of Coal-Based Series Polygeneration Systems for Methanol and Electricity Co-Production
title_sort	exergy analysis of coal-based series polygeneration systems for methanol and electricity co-production
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/79e026cf3cae45e694900dc5b73a02ac
work_keys_str_mv	AT jianyunzhang exergyanalysisofcoalbasedseriespolygenerationsystemsformethanolandelectricitycoproduction AT zhiweiyang exergyanalysisofcoalbasedseriespolygenerationsystemsformethanolandelectricitycoproduction AT linweima exergyanalysisofcoalbasedseriespolygenerationsystemsformethanolandelectricitycoproduction AT weidouni exergyanalysisofcoalbasedseriespolygenerationsystemsformethanolandelectricitycoproduction
_version_	1718431771072135168

Exergy Analysis of Coal-Based Series Polygeneration Systems for Methanol and Electricity Co-Production

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