Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Experimental Study on the Thermal Performance of a Printed Circuit Heat Exchanger in a Cryogenic Environment

극저온 환경의 인쇄기판형 열교환기 열적성능에 대한 실험적 연구

  • Kim, Dong Ho (Department of Extreme Thermal Systems, Korea Institute of Machinery and Materials) ;
  • Na, Sang Jun (Plant System and Machinery, Korea University of Science and Technology) ;
  • Kim, Young (Department of Extreme Thermal Systems, Korea Institute of Machinery and Materials) ;
  • Choi, Jun Seok (Department of Extreme Thermal Systems, Korea Institute of Machinery and Materials) ;
  • Yoon, Seok Ho (Department of Extreme Thermal Systems, Korea Institute of Machinery and Materials)
  • 김동호 (한국기계연구원 열공정극한기술연구실) ;
  • 나상준 (과학기술연합대학원대학교 플랜트기계전공) ;
  • 김영 (한국기계연구원 열공정극한기술연구실) ;
  • 최준석 (한국기계연구원 열공정극한기술연구실) ;
  • 윤석호 (한국기계연구원 열공정극한기술연구실)
  • Received : 2015.05.06
  • Accepted : 2015.07.08
  • Published : 2015.08.10
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Abstract

The advantages of a printed circuit heat exchanger (PCHE) are the compactness and efficiency derived from its heat-transfer characteristics; furthermore, a PCHE for which a diffusion bonding method was used during production can be applied to extreme environments such as a cryogenic condition. In this study, a micro-channel PCHE fabricated by diffusion bonding was investigated in a cryogenic environment regarding its thermal performance and the pressure drop. The test rig consists of an LN2 storage tank, vaporizers, heaters, and a cold box, whereby the vaporized cryogenic nitrogen flows in hot and cold streams. The overall heat-transfer coefficients were evaluated and compared with traditional correlations. Lastly, we suggested the modified heat-transfer correlations for a PCHE in a cryogenic condition.

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References

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  1. Recent Progress in Air-Conditioning and Refrigeration Research : A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2015 vol.28, pp.6, 2016, https://doi.org/10.6110/KJACR.2016.28.6.256