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Energies 2016, 9(4), 231;

Feasibility Study of a Scroll Expander for Recycling Low-Pressure Exhaust Gas Energy from a Vehicle Gasoline Engine System

School of Engineering, University of Warwick, Coventry CV4 7AL, West Midlands, UK
School of Electrical & Electronic Engineering, Huazhong University of Science & Technology, Wuhan 430074, China
School of Mechanical Engineering, University of Birmingham, Birmingham B15 2TT, UK
Author to whom correspondence should be addressed.
Academic Editor: Chang Sik Lee
Received: 11 January 2016 / Revised: 7 March 2016 / Accepted: 17 March 2016 / Published: 24 March 2016
(This article belongs to the Special Issue Energy Efficient Actuators and Systems)
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The growing number of vehicles on the road has led to a rapid increase in fuel consumption and toxic gas emissions, so the challenges in fuel efficiency improvement and reduction of CO2 and NOx emissions have always been on the top agenda of the automotive industry. The paper presents a feasibility study of recovering the low-pressure exhaust gas energy via by-pass connection of a scroll expander to the engine system exhaust. The paper starts with the description of the proposed new exhaust energy recycling scheme and the mathematical modelling of the system. A feasibility study is carried out to investigate whether this new scheme can work with the engine operation conditions specified by the engine test data. The initial study indicated that the scroll expander structure needs to be modified; otherwise, it cannot be used for exhaust energy recovery. The experimental test and simulation results presented in this paper indicate that it is feasible to recover the low-pressure exhaust gas energy using a scroll expander with a modified structure. The proposed energy recovery system has the potential to produce over 400 W power output with over 90% of engine exhaust flow recycling. View Full-Text
Keywords: scroll expander; gasoline engine; exhaust energy recovery scroll expander; gasoline engine; exhaust energy recovery

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Luo, X.; Wang, J.; Krupke, C.; Xu, H. Feasibility Study of a Scroll Expander for Recycling Low-Pressure Exhaust Gas Energy from a Vehicle Gasoline Engine System. Energies 2016, 9, 231.

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