Modeling of an Organic Rankine Cycle Waste Heat Recovery system for automotive engine applications

The remarkable investments made by manufacturers over the last few decades have contributed to improving the performance of internal combustion engines in every aspect: lower polluting emissions, greater specific power and thermal efficiency. Despite this, on an average, about 40% of the thermal pow...

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Autores principales:	D’Arco M., Giardiello G., Baratta M., de Nola F., Gimelli A., Misul D.
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	waste heat recovery (whr) organic rankine cycle (orc) internal combustion engine 1d simulation Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/7d0b9df3c60240369582ec16f6e46b42
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spelling	oai:doaj.org-article:7d0b9df3c60240369582ec16f6e46b422021-11-08T15:18:51ZModeling of an Organic Rankine Cycle Waste Heat Recovery system for automotive engine applications2267-124210.1051/e3sconf/202131207014https://doaj.org/article/7d0b9df3c60240369582ec16f6e46b422021-01-01T00:00:00Zhttps://www.e3s-conferences.org/articles/e3sconf/pdf/2021/88/e3sconf_ati2021_07014.pdfhttps://doaj.org/toc/2267-1242The remarkable investments made by manufacturers over the last few decades have contributed to improving the performance of internal combustion engines in every aspect: lower polluting emissions, greater specific power and thermal efficiency. Despite this, on an average, about 40% of the thermal power theoretically available from the combustion of the fuel is still stored in the exhaust gases and therefore dispersed in the environment. In this work the modeling and validation of a waste heat recovery (WHR) plant will be described, combining the engine with a low temperature Organic Rankine Cycle (ORC) system, in order to investigate the feasibility of this system on board of a vehicle, analyzing the quantity of thermal power recovered and made available in the form of electrical power. The ORC plant is modeled using a 0D/1D thermo-fluid dynamic approach. Starting from experimental tests, a map-based model for the piston pump and the scroll expander has been developed. The model has been validated through the use of a vector optimization technique, exploiting a genetic algorithm (MOGA). Subsequently, this system has been coupled to a spark ignition engine for automotive applications, adapting its speed range to comply with the ORC experimental tests. To have an accurate control over the expander inlet temperature, a bypass circuit and two throttles actuated by a PI controller have been implemented. The simulations were performed by considering 18 engine points at maximum load and different rpm. An average thermal efficiency increase of the system of 2.6% was obtained by introducing the recovery plant, and wide improvement chance can be foreseen in the case of ORC full-power use.D’Arco M.Giardiello G.Baratta M.de Nola F.Gimelli A.Misul D.EDP Sciencesarticlewaste heat recovery (whr)organic rankine cycle (orc)internal combustion engine1d simulationEnvironmental sciencesGE1-350ENFRE3S Web of Conferences, Vol 312, p 07014 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	waste heat recovery (whr) organic rankine cycle (orc) internal combustion engine 1d simulation Environmental sciences GE1-350
spellingShingle	waste heat recovery (whr) organic rankine cycle (orc) internal combustion engine 1d simulation Environmental sciences GE1-350 D’Arco M. Giardiello G. Baratta M. de Nola F. Gimelli A. Misul D. Modeling of an Organic Rankine Cycle Waste Heat Recovery system for automotive engine applications
description	The remarkable investments made by manufacturers over the last few decades have contributed to improving the performance of internal combustion engines in every aspect: lower polluting emissions, greater specific power and thermal efficiency. Despite this, on an average, about 40% of the thermal power theoretically available from the combustion of the fuel is still stored in the exhaust gases and therefore dispersed in the environment. In this work the modeling and validation of a waste heat recovery (WHR) plant will be described, combining the engine with a low temperature Organic Rankine Cycle (ORC) system, in order to investigate the feasibility of this system on board of a vehicle, analyzing the quantity of thermal power recovered and made available in the form of electrical power. The ORC plant is modeled using a 0D/1D thermo-fluid dynamic approach. Starting from experimental tests, a map-based model for the piston pump and the scroll expander has been developed. The model has been validated through the use of a vector optimization technique, exploiting a genetic algorithm (MOGA). Subsequently, this system has been coupled to a spark ignition engine for automotive applications, adapting its speed range to comply with the ORC experimental tests. To have an accurate control over the expander inlet temperature, a bypass circuit and two throttles actuated by a PI controller have been implemented. The simulations were performed by considering 18 engine points at maximum load and different rpm. An average thermal efficiency increase of the system of 2.6% was obtained by introducing the recovery plant, and wide improvement chance can be foreseen in the case of ORC full-power use.
format	article
author	D’Arco M. Giardiello G. Baratta M. de Nola F. Gimelli A. Misul D.
author_facet	D’Arco M. Giardiello G. Baratta M. de Nola F. Gimelli A. Misul D.
author_sort	D’Arco M.
title	Modeling of an Organic Rankine Cycle Waste Heat Recovery system for automotive engine applications
title_short	Modeling of an Organic Rankine Cycle Waste Heat Recovery system for automotive engine applications
title_full	Modeling of an Organic Rankine Cycle Waste Heat Recovery system for automotive engine applications
title_fullStr	Modeling of an Organic Rankine Cycle Waste Heat Recovery system for automotive engine applications
title_full_unstemmed	Modeling of an Organic Rankine Cycle Waste Heat Recovery system for automotive engine applications
title_sort	modeling of an organic rankine cycle waste heat recovery system for automotive engine applications
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/7d0b9df3c60240369582ec16f6e46b42
work_keys_str_mv	AT darcom modelingofanorganicrankinecyclewasteheatrecoverysystemforautomotiveengineapplications AT giardiellog modelingofanorganicrankinecyclewasteheatrecoverysystemforautomotiveengineapplications AT barattam modelingofanorganicrankinecyclewasteheatrecoverysystemforautomotiveengineapplications AT denolaf modelingofanorganicrankinecyclewasteheatrecoverysystemforautomotiveengineapplications AT gimellia modelingofanorganicrankinecyclewasteheatrecoverysystemforautomotiveengineapplications AT misuld modelingofanorganicrankinecyclewasteheatrecoverysystemforautomotiveengineapplications
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Modeling of an Organic Rankine Cycle Waste Heat Recovery system for automotive engine applications

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