The KSFM Journal of Fluid Machinery (한국유체기계학회 논문집)

Korean Society for Fluid machinery (한국유체기계학회)
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A Study on the Organic Rankine Cycle for the Fluctuating Heat Source

가변 열원에서 작동하기 위한 유기랭킨 사이클에 관한 연구

  • 조수용 (경상대학교 항공기부품기술연구센터) ;
  • 조종현 (선테크(주) 기술연구소)
  • Received : 2013.08.10
  • Accepted : 2014.01.04
  • Published : 2014.02.01
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Abstract

An organic Rankine cycle was analyzed to work at the optimal operating point when the heat source is fluctuated. R245fa was adopted as a working fluid, and an axial-type turbine as expander on the cycle was designed to convert the heat energy to the electricity since the turbo-type expander works at off-design points better than the positive displacement-type expander. A supersonic nozzle was designed to increase the spouting velocity because a higher spouting velocity can produce more output power. They were designed by the method of characteristics for the operating fluid of R245fa. Three different cases, such as various spouting velocities, various inlet total temperatures, and various nozzle numbers, were studied. From these results, an optimal operating cycle can be designed with the organic Rankine cycle when the available heat source as renewable energy is low-grade temperature and fluctuated.

Keywords

References

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