Diesel engine waste heat recovery system comprehensive optimization based on system and heat exchanger simulation

To further improve the thermal efficiency of diesel engines, a waste heat recovery system model utilizing organic Rankine cycle (ORC) is constructed and verified through system bench test and heat exchanger bench test. To recover waste heat from diesel engine exhaust, ethanol, cyclopentane, cyclohex...

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Autores principales:	Li Da, Sun Qiang, Sun Ke, Zhang Guodong, Bai Shuzhan, Li Guoxiang
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	organic rankine cycle exhaust working fluid recuperator Physics QC1-999
Acceso en línea:	https://doaj.org/article/629808d077c2447a9e3a7a174c1b7cc6
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spelling	oai:doaj.org-article:629808d077c2447a9e3a7a174c1b7cc62021-12-05T14:11:02ZDiesel engine waste heat recovery system comprehensive optimization based on system and heat exchanger simulation2391-547110.1515/phys-2021-0039https://doaj.org/article/629808d077c2447a9e3a7a174c1b7cc62021-07-01T00:00:00Zhttps://doi.org/10.1515/phys-2021-0039https://doaj.org/toc/2391-5471To further improve the thermal efficiency of diesel engines, a waste heat recovery system model utilizing organic Rankine cycle (ORC) is constructed and verified through system bench test and heat exchanger bench test. To recover waste heat from diesel engine exhaust, ethanol, cyclopentane, cyclohexane, R1233zd (E), and R245fa were selected for comparison. The quality of heat source, the quality of evaporator, the system output, and the system complicity were taken as variables for comparison. Analysis shows that for ORC systems without recuperator, ethanol system has the best system output of the five in a wide operation temper range, with the highest exergy efficiency of 24.1%, yet the exergy efficiency increase after the application of recuperator, 9.0%, is limited. For low temperature exhaust, cyclopentane system has the best performance with or without recuperator, and the cyclopentane system with recuperator has the best performance in terms of exergy efficiency, 27.6%, though complex heat exchangers are also required for high power output. The system output of the R1233zd system is better than the R245fa system, yet the advantage of low evaporate temperature can be better utilized for low quality waste heat recovery.Li DaSun QiangSun KeZhang GuodongBai ShuzhanLi GuoxiangDe Gruyterarticleorganic rankine cycleexhaustworking fluidrecuperatorPhysicsQC1-999ENOpen Physics, Vol 19, Iss 1, Pp 331-340 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	organic rankine cycle exhaust working fluid recuperator Physics QC1-999
spellingShingle	organic rankine cycle exhaust working fluid recuperator Physics QC1-999 Li Da Sun Qiang Sun Ke Zhang Guodong Bai Shuzhan Li Guoxiang Diesel engine waste heat recovery system comprehensive optimization based on system and heat exchanger simulation
description	To further improve the thermal efficiency of diesel engines, a waste heat recovery system model utilizing organic Rankine cycle (ORC) is constructed and verified through system bench test and heat exchanger bench test. To recover waste heat from diesel engine exhaust, ethanol, cyclopentane, cyclohexane, R1233zd (E), and R245fa were selected for comparison. The quality of heat source, the quality of evaporator, the system output, and the system complicity were taken as variables for comparison. Analysis shows that for ORC systems without recuperator, ethanol system has the best system output of the five in a wide operation temper range, with the highest exergy efficiency of 24.1%, yet the exergy efficiency increase after the application of recuperator, 9.0%, is limited. For low temperature exhaust, cyclopentane system has the best performance with or without recuperator, and the cyclopentane system with recuperator has the best performance in terms of exergy efficiency, 27.6%, though complex heat exchangers are also required for high power output. The system output of the R1233zd system is better than the R245fa system, yet the advantage of low evaporate temperature can be better utilized for low quality waste heat recovery.
format	article
author	Li Da Sun Qiang Sun Ke Zhang Guodong Bai Shuzhan Li Guoxiang
author_facet	Li Da Sun Qiang Sun Ke Zhang Guodong Bai Shuzhan Li Guoxiang
author_sort	Li Da
title	Diesel engine waste heat recovery system comprehensive optimization based on system and heat exchanger simulation
title_short	Diesel engine waste heat recovery system comprehensive optimization based on system and heat exchanger simulation
title_full	Diesel engine waste heat recovery system comprehensive optimization based on system and heat exchanger simulation
title_fullStr	Diesel engine waste heat recovery system comprehensive optimization based on system and heat exchanger simulation
title_full_unstemmed	Diesel engine waste heat recovery system comprehensive optimization based on system and heat exchanger simulation
title_sort	diesel engine waste heat recovery system comprehensive optimization based on system and heat exchanger simulation
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/629808d077c2447a9e3a7a174c1b7cc6
work_keys_str_mv	AT lida dieselenginewasteheatrecoverysystemcomprehensiveoptimizationbasedonsystemandheatexchangersimulation AT sunqiang dieselenginewasteheatrecoverysystemcomprehensiveoptimizationbasedonsystemandheatexchangersimulation AT sunke dieselenginewasteheatrecoverysystemcomprehensiveoptimizationbasedonsystemandheatexchangersimulation AT zhangguodong dieselenginewasteheatrecoverysystemcomprehensiveoptimizationbasedonsystemandheatexchangersimulation AT baishuzhan dieselenginewasteheatrecoverysystemcomprehensiveoptimizationbasedonsystemandheatexchangersimulation AT liguoxiang dieselenginewasteheatrecoverysystemcomprehensiveoptimizationbasedonsystemandheatexchangersimulation
_version_	1718371476626735104

Diesel engine waste heat recovery system comprehensive optimization based on system and heat exchanger simulation

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