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Simulation analysis of cooling methods of an on-board organic Rankine cycle exhaust heat recovery system

Wei, MS and Tian, Guohong (2017) Simulation analysis of cooling methods of an on-board organic Rankine cycle exhaust heat recovery system INTERNATIONAL JOURNAL OF ENERGY RESEARCH.

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Energy saving and emission reduction of engines were taken seriously, especially for vehicular diesel engines. Exhaust heat recovery based on organic Rankine cycle (ORC) system has been considered as an effective approach for improving engine fuel economy. This article presents the investigation of water or air cooling method for an ORC exhaust heat recovery system on a heavy duty truck through simulations. The models of the truck engine and the ORC system were developed in GT-suite, and the integration system model was developed in the Simulink environment. The validity of the models was verified experimentally. The performance of the vehicular engine with ORC system using water or air cooling method was comparatively analyzed. The simulation results indicated that water cooling method is more suitable for the vehicular ORC system than air cooling method. The relation between benefit and penalty of the ORC system and cooling system was discussed. The operating condition of the cooling system was confirmed having significant effects on the combined system performance, especially the fan speed. The performance improvement of the engine with the use of ORC system was further evaluated under different engine operating conditions and ambient temperatures. Lower ambient temperature had positive impacts on the engine fuel economy. The mass flow rate of exhaust gas for heat recovery should be regulated for better performance under high ambient temperature.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Mechanical Engineering Sciences
Authors :
Date : 16 September 2017
Copyright Disclaimer : This is the peer reviewed version of an article accepted for publication in International Journal of Energy Research, and will be available online at: This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Uncontrolled Keywords : Heavy-duty truck, Diesel engine, ORC, Cooling method, Operating condition, Ambient temperature, BSFC
Depositing User : Melanie Hughes
Date Deposited : 16 Jun 2017 16:00
Last Modified : 13 Jul 2017 10:27

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