Experimental Study on the Operating Characteristics of the Organic Rankine Cycle

Abstract An experimental study of an ORC (Organic Rankine Cycle) system has been performed for small-scale applicationsin the range of a few kW for low-grade-recovery heat sources. The ORC system was equipped with a scroll expander.Experimental tests were carried out using this system, and showed good performance and reliability for the small-scale system.The effects of various operating conditions were selected as the main parameters for the performance of ORC system, suchas the expander speeds and mass flow rates of R-134a for expander inlet temperatures ranging from 100 ℃ to 190 ℃ , aswell as the thermal power, thermal efficiency, expansion efficiency, and volumetric efficiency. Key words Organic Rankine Cycle(유기랭킨사이클), Scroll Expander(스크롤 팽창기), Operating Characteristics(작동특성), Thermal Efficiency(열효율), Expansion Efficiency(팽창효율), Volumetric Efficiency(체적효율)†Corresponding author, E-mail: csyoon@hnu.kr 기호설명 ： 질량유량 [kg/s] ： 동력 [kW] ： 열전달률 [kg/kJ] ： 온도 [ ℃ ]  ： 펌프의 등엔트로피 효율  

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