Experimental Study on the Performance Characteristics of a Scroll Expander for 1kW-class Organic Rankine Cycle

1kW급 유기랭킨사이클용 스크롤 팽창기의 성능 특성에 관한 실험적 연구

  • Received : 2015.06.30
  • Accepted : 2015.08.26
  • Published : 2015.08.31


The performance characteristics of a scroll expander is the most important variable for the performance of organic Rankine cycle system. In this paper, the performance characteristics of a scroll expander was identified using 1kW class organic Rankine cycle system with various operating conditions. The ORC system is composed of an evaporator, a scroll expander, a condenser and a working fluid feed pump that uses R245fa as working fluid. The hot water temperature was controlled from $80^{\circ}C$ to $115^{\circ}C$ by the 50kW-class electric water-heater. The maximum isentropic efficiency of the scroll expander was measured about 77%, and the shaft power was measured from 0.5 kW to 1.8 kW according to heat source temperatures.


Performance Test;Organic Rankine Cycle(ORC);Scroll Expander;Low-grade Heat Recovery;Filling factor


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Supported by : 한국에너지기술평가원, 한국연구재단