Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on Stirling Cryocooler for Precooling Hydrogen Liquefier

수소액화 예냉용 소형 스털링 극저온 냉동기 특성 연구

  • PARK, SEONGJE (Department of Energy System, Korea Institute of Machinery & Materials) ;
  • KO, JUNSEOK (Department of Energy System, Korea Institute of Machinery & Materials) ;
  • HONG, YONGJU (Department of Energy System, Korea Institute of Machinery & Materials) ;
  • KIM, HYOBONG (Department of Energy System, Korea Institute of Machinery & Materials) ;
  • YEOM, HANKIL (Department of Energy System, Korea Institute of Machinery & Materials) ;
  • IN, SEHWAN (Department of Energy System, Korea Institute of Machinery & Materials)
  • 박성제 (한국기계연구원 극한기계부품연구본부) ;
  • 고준석 (한국기계연구원 극한기계부품연구본부) ;
  • 홍용주 (한국기계연구원 극한기계부품연구본부) ;
  • 김효봉 (한국기계연구원 극한기계부품연구본부) ;
  • 염한길 (한국기계연구원 극한기계부품연구본부) ;
  • 인세환 (한국기계연구원 극한기계부품연구본부)
  • Received : 2016.11.15
  • Accepted : 2016.12.30
  • Published : 2016.12.30
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Abstract

Korea Institute of Machinery & Materials (KIMM) has developed a high efficient Stirling cryocooler with moving magnet linear compressor for precooling hydrogen liquefier and cooling high temperature superconductor (HTS) devices, such as superconductor cable and superconductor fault current limiters. Hydrogen liquefier and HTS electric devices require cryocooler with cooling capacity of hundred watts to kilowatts at 77 K. The compressor in the Stirling cryocooler uses opposed moving magnet linear motors to drive opposed pistons. High efficient Stirling cryocooler is designed by SAGE-software, manufactured and tested systematically. A cooling capacity of 1 kW at 77 K with an electric input power of 9.6 kW has been analyzed. But prototype test results of the Stirling cryocooler have the cooling capacity of 0.65 kW at 76.8 K with an electric input power of 8.1 kW. And then, 21.5% Carnot COP (Coefficient of performance) of the prototype Stirling cryocooler is achieved. The comparison analysis between SAGE-model and experimental results has shown the direction for further design optimization of the Stirling cryocooler.

Keywords

References

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