Energy Performance Comparison of Heat Pump and Power Cycles in Waste Heat Recovery

A chemical process usually needs to combust fossil fuels to provide the energy required for production, then a large number of low temperature waste heat is discharged to the environment. Recovery of such waste heat plays an important role in saving primary energy and protecting the environment. The...

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Autores principales:	Zhimin Tan, Xiao Feng, Yufei Wang
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/28a5a1c7d8534d7f97f04d9a6defe29f
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spelling	oai:doaj.org-article:28a5a1c7d8534d7f97f04d9a6defe29f2021-11-15T21:47:42ZEnergy Performance Comparison of Heat Pump and Power Cycles in Waste Heat Recovery10.3303/CET21881312283-9216https://doaj.org/article/28a5a1c7d8534d7f97f04d9a6defe29f2021-11-01T00:00:00Zhttps://www.cetjournal.it/index.php/cet/article/view/11924https://doaj.org/toc/2283-9216A chemical process usually needs to combust fossil fuels to provide the energy required for production, then a large number of low temperature waste heat is discharged to the environment. Recovery of such waste heat plays an important role in saving primary energy and protecting the environment. There are many waste heat recovery technologies, among which heat pump and power cycles are widely used. In order to make a proper choice of the utilization mode for the low temperature waste heat, the simulation models of mechanical heat pump, steam turbine and Organic Rankine Cycle are established in this paper. Calculations are made under different waste steam temperatures (100 °C to 150 °C) and different heat pump temperature lifts (10 °C, 15 °C, 30 °C). Exergy efficiency is used as the index to compare the energy performance of the three waste heat recovery cycles. The results show that the exergy efficiency of the mechanical heat pump is always higher than 0.9, while that of the Organic Rankine Cycle and steam turbine is between 0.3 and 0.5. The exergy efficiency of the mechanical heat pump is always highest under any working conditions. Based on energy performance, the mechanical heat pump is always a better choice than a power cycle in low-temperature waste heat recovery. Besides, the energy performance of the Organic Rankine Cycle is better than that of the steam turbine. This article compares these two waste heat recovery technologies with completely different working principles, and can provide a reference for factories to choose a suitable waste heat recovery technology.Zhimin TanXiao FengYufei WangAIDIC 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 Zhimin Tan Xiao Feng Yufei Wang Energy Performance Comparison of Heat Pump and Power Cycles in Waste Heat Recovery
description	A chemical process usually needs to combust fossil fuels to provide the energy required for production, then a large number of low temperature waste heat is discharged to the environment. Recovery of such waste heat plays an important role in saving primary energy and protecting the environment. There are many waste heat recovery technologies, among which heat pump and power cycles are widely used. In order to make a proper choice of the utilization mode for the low temperature waste heat, the simulation models of mechanical heat pump, steam turbine and Organic Rankine Cycle are established in this paper. Calculations are made under different waste steam temperatures (100 °C to 150 °C) and different heat pump temperature lifts (10 °C, 15 °C, 30 °C). Exergy efficiency is used as the index to compare the energy performance of the three waste heat recovery cycles. The results show that the exergy efficiency of the mechanical heat pump is always higher than 0.9, while that of the Organic Rankine Cycle and steam turbine is between 0.3 and 0.5. The exergy efficiency of the mechanical heat pump is always highest under any working conditions. Based on energy performance, the mechanical heat pump is always a better choice than a power cycle in low-temperature waste heat recovery. Besides, the energy performance of the Organic Rankine Cycle is better than that of the steam turbine. This article compares these two waste heat recovery technologies with completely different working principles, and can provide a reference for factories to choose a suitable waste heat recovery technology.
format	article
author	Zhimin Tan Xiao Feng Yufei Wang
author_facet	Zhimin Tan Xiao Feng Yufei Wang
author_sort	Zhimin Tan
title	Energy Performance Comparison of Heat Pump and Power Cycles in Waste Heat Recovery
title_short	Energy Performance Comparison of Heat Pump and Power Cycles in Waste Heat Recovery
title_full	Energy Performance Comparison of Heat Pump and Power Cycles in Waste Heat Recovery
title_fullStr	Energy Performance Comparison of Heat Pump and Power Cycles in Waste Heat Recovery
title_full_unstemmed	Energy Performance Comparison of Heat Pump and Power Cycles in Waste Heat Recovery
title_sort	energy performance comparison of heat pump and power cycles in waste heat recovery
publisher	AIDIC Servizi S.r.l.
publishDate	2021
url	https://doaj.org/article/28a5a1c7d8534d7f97f04d9a6defe29f
work_keys_str_mv	AT zhimintan energyperformancecomparisonofheatpumpandpowercyclesinwasteheatrecovery AT xiaofeng energyperformancecomparisonofheatpumpandpowercyclesinwasteheatrecovery AT yufeiwang energyperformancecomparisonofheatpumpandpowercyclesinwasteheatrecovery
_version_	1718426772392902656

Energy Performance Comparison of Heat Pump and Power Cycles in Waste Heat Recovery

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