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김현재(Hyun Jae Kim),유제승(Je Seung Yu),김현진(Hyun Jin Kim) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.6
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 ㎾ out of engine coolant waste heat of 17.5 ㎾, resulting in the Rankine cycle efficiency of 3.43%.
유제승(Je Seung Yu),김현재(Hyun Jae Kim),김현진(Hyun Jin Kim) 대한설비공학회 2011 설비공학 논문집 Vol.23 No.12
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%.
유제승(Je Seung Yu),김현재(Hyun Jae Kim),김우영(Woo Young Kim),김현진(Hyun Jin Kim) 대한설비공학회 2010 대한설비공학회 학술발표대회논문집 Vol.2010 No.11
Low-grade heat is frequently encountered as a by-product in industrial processes. However, waste heat recovery is generally considered to be a technologically challenge and is rarely economically viable. One possible way of increasing the use of low-grade heat is to utilize Rankine cycle in order to convert low-grade heat to high-grade quality energy such as electricity. This paper addresses a shaft power generation by using a scroll expander in an organic Rankine cycle with R134a as a working fluid, where heat is supplied from an engine coolant. Design practice of a scroll expander has been carried out for 1.5 ㎾ power output, and the expander performance has been analyzed by numerical simulation.