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http://dx.doi.org/10.6110/KJACR.2011.23.12.815

Design of a Scroll Expander for Waste Heat Recovery from Engine Coolant  

Yu, Je-Seung (Department of Mechanical Engineering, Graduate School, Incheon University)
Kim, Hyun-Jae (Department of Mechanical Engineering, Graduate School, Incheon University)
Kim, Hyun-Jin (Department of Mechanical Engineering, Incheon University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.23, no.12, 2011 , pp. 815-820 More about this Journal
Abstract
A scroll expander was designed for an energy converter from waste heat of IC engine coolant to useful shaft work. The scroll expander is to run in a Rankine cycle which receives heat energy transferred from engine coolant circulation cycle. The working fluid was Ethanol. For axial compliance, a back pressure chamber was provided on the rear side of the orbiting scroll. Lubrication oil was delivered by a positive displacement type oil pump driven by the shaft rotation. Performance analysis on the scroll expander showed that the expander efficiency was 63.4%. It extracts shaft power of 0.6 kW out of engine coolant waste heat of 17.5 kW, resulting in the Rankine cycle efficiency of 3.43%.
Keywords
Scroll expander; Rankine cycle; Shaft power; Engine coolant; Waste heat;
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