| Title |
Operating Characteristics of a Scroll Expander Used in Organic Rankine Cycle |
| Authors |
신동길(Dong Gil Shin) ; 김영민(Young Min Kim) ; 김창기(Chang Gi Kim) |
| Keywords |
신재생에너지 ; 초소형 열병합발전 ; 유기랭킨사이클 ; 스크롤 팽창기 Renewable energy ; Micro-CHP ; ORC ; Scroll expander |
| Abstract |
The rapid increases in global energy demand and global warming need renewable energy sources such as solar thermal energy, biomass energy and waste heat. A ORC-based micro-CHP system(< 10 kWe) is one of the effective means to use renewable energy and solve energy problems because of its compactness, flexibilities and lower cost compared to other systems. The most important core components of the ORC is the expander which has a strong effect on the cycle efficiency. In the range of power output from 1 to 10 kW, the scroll expander is a good choice due to its performance and reliability. In this study, we have carried out an experimental study on an ORC equipped with oil-free scroll expander working with refrigerant R134a. We have measured power output and thermal efficiencies of the ORC and analyzed correlation between volumetric efficiencies of the expander and thermal efficiencies of the ORC. |