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윤은구(Eunkoo Yun),김현동(Hyun Dong Kim),김귀순(Kui Soon Kim),김장목(Jang Mok Kim),윤상열(Sang Youl Yoon),최범석(Bum Suk Choi),한상조(Sangjo Han),정양범(Yang Bum Jeong),김경천(Kyung Chun Kim) 대한기계학회 2013 대한기계학회 춘추학술대회 Vol.2013 No.12
This paper presents preliminary results of development of 200 kW-class organic Rankine cycle(ORC) system that consists of two shell & tube type heat exchangers for the evaporator and the condenser, a multi-stage centrifugal pump to feed R-245fa refrigerant into the evaporator, a turbine-generator module expected to deliver a power about 200 kW and an electric generator. Back-to-back 2-stage turbine was adopted to increase expansion ratio up to 9.5 for achieving high thermal efficiency. The design point of rotational speed of the turbine was 15,000 rpm. The 2 MW electric heater which can supply hot water as heat source was installed. The electric power output, thermal efficiency, turbine isentropic efficiency, mass flow rate and expander outlet temperature have been analyzed. Futhermore, the experimental results of turbine performance was compared with CFD analysis results.