Thermo-economic analysis of a supercritical CO2-based waste heat recovery system

This work investigates the performance of a supercritical CO2 cycle as the bottoming cycle of a commercial gas turbine with 4.7 MW of electric power output. In detail, the partial heating cycle is the layout chosen for the interesting trade-off between heat recovery and cycle efficiency with a limit...

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Autores principales:	Bonalumi Davide, Giuffrida Antonio, Sicali Federico
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/417bf1df6acb479bba3f1375d7e0d248
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spelling	oai:doaj.org-article:417bf1df6acb479bba3f1375d7e0d2482021-11-08T15:18:54ZThermo-economic analysis of a supercritical CO2-based waste heat recovery system2267-124210.1051/e3sconf/202131208022https://doaj.org/article/417bf1df6acb479bba3f1375d7e0d2482021-01-01T00:00:00Zhttps://www.e3s-conferences.org/articles/e3sconf/pdf/2021/88/e3sconf_ati2021_08022.pdfhttps://doaj.org/toc/2267-1242This work investigates the performance of a supercritical CO2 cycle as the bottoming cycle of a commercial gas turbine with 4.7 MW of electric power output. In detail, the partial heating cycle is the layout chosen for the interesting trade-off between heat recovery and cycle efficiency with a limited number of components. Single-stage radial turbomachines are selected according to the theory of similitude. In particular, the compressor is a troublesome turbomachine as it works near the critical point where significant variations of the CO2 properties occur. Efficiency values for turbomachinery are not fixed at first glance but result from actual size and running conditions, based on flow rates, enthalpy variations as well as rotational speeds. In addition, a limit is set for the machine Mach numbers in order to avoid heavily loaded turbomachinery. The thermodynamic study of the bottoming cycle is carried out by means of the mass and energy balance equations. A parametric analysis is carried out with particular attention to a number of specific parameters. Considering the power output calculated for the supercritical CO2 cycle, economic calculations are also carried out and the related costs compared to those specific of organic Rankine cycles with similar power output.Bonalumi DavideGiuffrida AntonioSicali FedericoEDP SciencesarticleEnvironmental sciencesGE1-350ENFRE3S Web of Conferences, Vol 312, p 08022 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	Environmental sciences GE1-350
spellingShingle	Environmental sciences GE1-350 Bonalumi Davide Giuffrida Antonio Sicali Federico Thermo-economic analysis of a supercritical CO2-based waste heat recovery system
description	This work investigates the performance of a supercritical CO2 cycle as the bottoming cycle of a commercial gas turbine with 4.7 MW of electric power output. In detail, the partial heating cycle is the layout chosen for the interesting trade-off between heat recovery and cycle efficiency with a limited number of components. Single-stage radial turbomachines are selected according to the theory of similitude. In particular, the compressor is a troublesome turbomachine as it works near the critical point where significant variations of the CO2 properties occur. Efficiency values for turbomachinery are not fixed at first glance but result from actual size and running conditions, based on flow rates, enthalpy variations as well as rotational speeds. In addition, a limit is set for the machine Mach numbers in order to avoid heavily loaded turbomachinery. The thermodynamic study of the bottoming cycle is carried out by means of the mass and energy balance equations. A parametric analysis is carried out with particular attention to a number of specific parameters. Considering the power output calculated for the supercritical CO2 cycle, economic calculations are also carried out and the related costs compared to those specific of organic Rankine cycles with similar power output.
format	article
author	Bonalumi Davide Giuffrida Antonio Sicali Federico
author_facet	Bonalumi Davide Giuffrida Antonio Sicali Federico
author_sort	Bonalumi Davide
title	Thermo-economic analysis of a supercritical CO2-based waste heat recovery system
title_short	Thermo-economic analysis of a supercritical CO2-based waste heat recovery system
title_full	Thermo-economic analysis of a supercritical CO2-based waste heat recovery system
title_fullStr	Thermo-economic analysis of a supercritical CO2-based waste heat recovery system
title_full_unstemmed	Thermo-economic analysis of a supercritical CO2-based waste heat recovery system
title_sort	thermo-economic analysis of a supercritical co2-based waste heat recovery system
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/417bf1df6acb479bba3f1375d7e0d248
work_keys_str_mv	AT bonalumidavide thermoeconomicanalysisofasupercriticalco2basedwasteheatrecoverysystem AT giuffridaantonio thermoeconomicanalysisofasupercriticalco2basedwasteheatrecoverysystem AT sicalifederico thermoeconomicanalysisofasupercriticalco2basedwasteheatrecoverysystem
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Thermo-economic analysis of a supercritical CO2-based waste heat recovery system

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