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Brayton cycles as waste heat recovery systems on series hybrid electric vehicles

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dc.contributor.author Bou Nader, Wissam
dc.contributor.author Mansour, Charbel
dc.contributor.author Dumand, Clément
dc.contributor.author Nemer, Maroun
dc.date.accessioned 2020-09-22T12:17:53Z
dc.date.available 2020-09-22T12:17:53Z
dc.date.copyright 2018 en_US
dc.identifier.issn 0196-8904 en_US
dc.identifier.uri http://hdl.handle.net/10725/12158
dc.description.abstract In the global attempt to increase the powertrain overall efficiency of hybrid vehicles while reducing the battery size, engine waste heat recovery (WHR) systems are nowadays promising technologies. This is in particular interesting for series hybrid electric vehicles (SHEV), as the engine operates at a relative high load and under steady conditions. Therefore, the resulting high exhaust gas temperature presents the advantage of increased WHR efficiency. The Brayton cycle offers a relatively reduced weight compared to other WHR systems and presents a low complexity for integration in vehicles since it relies on an open system architecture with air as the working fluid, which consequently avoids the need for a condenser compared to the Rankine cycle. This paper investigates the potential of fuel consumption savings of a SHEV using the Brayton cycle as a WHR system from the internal combustion engine (ICE) exhaust gases. An exergy analysis is conducted on the simple Brayton cycle and several Brayton waste heat recovery (BWHR) systems were identified. A SHEV with ICE-BWHR systems is modeled, where the recovered engine waste heat is converted into electricity using an electric generator and stored in the vehicle battery. The energy consumption simulations is performed on the worldwide-harmonized light-vehicles test cycle (WLTC) while considering the additional weight of the BWHR systems. The intercooled Brayton cycle (IBC) architecture is identified as the most promising for automotive applications as it offers the most convenient compromise between high efficiency and low integration complexity. Results show that 5.5% and 7.0% improved fuel economy on plug-in and self-sustaining SHEV configurations respectively when compared to similar vehicle configurations with ICE auxiliary power units. In addition to the fuel economy improvements, the IBC-WHR system offers other intrinsic advantages such as low noise, low vibration, high durability which makes it a potential heat recovery system for integration in SHEV. en_US
dc.language.iso en en_US
dc.title Brayton cycles as waste heat recovery systems on series hybrid electric vehicles en_US
dc.type Article en_US
dc.description.version Published en_US
dc.author.school SOE en_US
dc.author.idnumber 201001655 en_US
dc.author.department Industrial And Mechanical Engineering en_US
dc.description.embargo N/A en_US
dc.relation.journal Energy Conversion and Management en_US
dc.journal.volume 168 en_US
dc.article.pages 200-214 en_US
dc.keywords Waste heat recovery en_US
dc.keywords Thermodynamic machines en_US
dc.keywords Brayton cycle en_US
dc.keywords Exergy analysis en_US
dc.keywords Series hybrid electric vehicles en_US
dc.keywords Global optimization en_US
dc.identifier.doi https://doi.org/10.1016/j.enconman.2018.05.004 en_US
dc.identifier.ctation Bou Nader, W., Mansour, C., Dumand, C., & Nemer, M. (2018). Brayton cycles as waste heat recovery systems on series hybrid electric vehicles. Energy Conversion and Management, 168, 200-214. en_US
dc.author.email charbel.mansour@lau.edu.lb en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url https://www.sciencedirect.com/science/article/pii/S0196890418304643 en_US
dc.author.affiliation Lebanese American University en_US


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