Experimental study of the potential for thermal energy recovery with thermoelectric devices in low displacement diesel engines

Improving the thermal efficiency of internal combustion engines is essential to reduce the operating costs and complaints with the increasing environmental requirements. Thermoelectric generators came up as an opportunity to reuse part of the heat loss with the exhausts. This paper evaluates the per...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	R. Ramírez-Restrepo, A. Sagastume-Gutiérrez, J. Cabello-Eras, B. Hernández, J. Duarte-Forero
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Energy efficiency Internal combustion engine Thermoelectric generator Thermoelectric module Science (General) Q1-390 Social sciences (General) H1-99
Acceso en línea:	https://doaj.org/article/269d9cdcffb44c78a840d6c5d0703417
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:269d9cdcffb44c78a840d6c5d0703417
record_format	dspace
spelling	oai:doaj.org-article:269d9cdcffb44c78a840d6c5d07034172021-12-02T05:02:22ZExperimental study of the potential for thermal energy recovery with thermoelectric devices in low displacement diesel engines2405-844010.1016/j.heliyon.2021.e08273https://doaj.org/article/269d9cdcffb44c78a840d6c5d07034172021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2405844021023768https://doaj.org/toc/2405-8440Improving the thermal efficiency of internal combustion engines is essential to reduce the operating costs and complaints with the increasing environmental requirements. Thermoelectric generators came up as an opportunity to reuse part of the heat loss with the exhausts. This paper evaluates the performance of a thermoelectric generator to improve the efficiency of a stationary diesel engine under different rotational speeds and torques. The data was obtained through CFD simulations and validated with experiments. The proposed solution uses a cooling system to control the temperature of the thermoelectric modules. The results show that the torque and the rotational speed of the engine are the most significant performance parameters of the thermoelectric generator, while the influence of the cooling water temperature has a minor but still significant influence. Additionally, the results show a change from 1.3% to 6.2% in the thermoelectric generator efficiency, while the exergy efficiency varies between 1.8% and 7.9%. The exergy balance indicates that most of the exergy is loss because of the irreversibilities in the thermoelectric generator and of the exergy loss with the exhausts. The exergy loss can be reduced by optimizing the design of the heat exchanger. Since the thermoelectric generator improved the engine efficiency by a marginal 0.2%–0.8%. Therefore, it is important to further research how to improve the design of heat exchangers for thermoelectric generators to increase their energy conversion efficiency and their impact on the energy efficiency of internal combustion engines.R. Ramírez-RestrepoA. Sagastume-GutiérrezJ. Cabello-ErasB. HernándezJ. Duarte-ForeroElsevierarticleEnergy efficiencyInternal combustion engineThermoelectric generatorThermoelectric moduleScience (General)Q1-390Social sciences (General)H1-99ENHeliyon, Vol 7, Iss 11, Pp e08273- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Energy efficiency Internal combustion engine Thermoelectric generator Thermoelectric module Science (General) Q1-390 Social sciences (General) H1-99
spellingShingle	Energy efficiency Internal combustion engine Thermoelectric generator Thermoelectric module Science (General) Q1-390 Social sciences (General) H1-99 R. Ramírez-Restrepo A. Sagastume-Gutiérrez J. Cabello-Eras B. Hernández J. Duarte-Forero Experimental study of the potential for thermal energy recovery with thermoelectric devices in low displacement diesel engines
description	Improving the thermal efficiency of internal combustion engines is essential to reduce the operating costs and complaints with the increasing environmental requirements. Thermoelectric generators came up as an opportunity to reuse part of the heat loss with the exhausts. This paper evaluates the performance of a thermoelectric generator to improve the efficiency of a stationary diesel engine under different rotational speeds and torques. The data was obtained through CFD simulations and validated with experiments. The proposed solution uses a cooling system to control the temperature of the thermoelectric modules. The results show that the torque and the rotational speed of the engine are the most significant performance parameters of the thermoelectric generator, while the influence of the cooling water temperature has a minor but still significant influence. Additionally, the results show a change from 1.3% to 6.2% in the thermoelectric generator efficiency, while the exergy efficiency varies between 1.8% and 7.9%. The exergy balance indicates that most of the exergy is loss because of the irreversibilities in the thermoelectric generator and of the exergy loss with the exhausts. The exergy loss can be reduced by optimizing the design of the heat exchanger. Since the thermoelectric generator improved the engine efficiency by a marginal 0.2%–0.8%. Therefore, it is important to further research how to improve the design of heat exchangers for thermoelectric generators to increase their energy conversion efficiency and their impact on the energy efficiency of internal combustion engines.
format	article
author	R. Ramírez-Restrepo A. Sagastume-Gutiérrez J. Cabello-Eras B. Hernández J. Duarte-Forero
author_facet	R. Ramírez-Restrepo A. Sagastume-Gutiérrez J. Cabello-Eras B. Hernández J. Duarte-Forero
author_sort	R. Ramírez-Restrepo
title	Experimental study of the potential for thermal energy recovery with thermoelectric devices in low displacement diesel engines
title_short	Experimental study of the potential for thermal energy recovery with thermoelectric devices in low displacement diesel engines
title_full	Experimental study of the potential for thermal energy recovery with thermoelectric devices in low displacement diesel engines
title_fullStr	Experimental study of the potential for thermal energy recovery with thermoelectric devices in low displacement diesel engines
title_full_unstemmed	Experimental study of the potential for thermal energy recovery with thermoelectric devices in low displacement diesel engines
title_sort	experimental study of the potential for thermal energy recovery with thermoelectric devices in low displacement diesel engines
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/269d9cdcffb44c78a840d6c5d0703417
work_keys_str_mv	AT rramirezrestrepo experimentalstudyofthepotentialforthermalenergyrecoverywiththermoelectricdevicesinlowdisplacementdieselengines AT asagastumegutierrez experimentalstudyofthepotentialforthermalenergyrecoverywiththermoelectricdevicesinlowdisplacementdieselengines AT jcabelloeras experimentalstudyofthepotentialforthermalenergyrecoverywiththermoelectricdevicesinlowdisplacementdieselengines AT bhernandez experimentalstudyofthepotentialforthermalenergyrecoverywiththermoelectricdevicesinlowdisplacementdieselengines AT jduarteforero experimentalstudyofthepotentialforthermalenergyrecoverywiththermoelectricdevicesinlowdisplacementdieselengines
_version_	1718400758228975616

Experimental study of the potential for thermal energy recovery with thermoelectric devices in low displacement diesel engines

Ejemplares similares