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

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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Effects of ortho-para hydrogen conversion on hydrogen liquefaction performance

Ortho-para 수소변환이 수소액화성능에 미치는 영향

  • 최항집 (한국과학기술원 열·유동제어연구센터) ;
  • 강병하 (한국과학기술원 열·유동제어연구센터) ;
  • 최영돈 (고려대학교 기계공학과)
  • Published : 2000.02.01
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Abstract

A direct hydrogen liquefaction equipment has been developed and tested, which consists of a GM refrigerator, a liquefaction vessel, a radiation shield, a cryostat, and an ortho-para converter with catalyst. The effect of ortho-para hydrogen conversion on the performance of hydrogen liquefaction has been investigated. The time needed for the hydrogen liquefaction process with hydrogen pressure charge of 4 atm was delayed to around 75 minutes, and the liquefied mass flow rate of the hydrogen was about 0.0150∼ 0.0205 g/s when the hydrogen was liquefied with the direct hydrogen liquefaction system considering ortho-para conversion. With ortho-para conversion, the liquefied mass flow rate decreased up to 20%. Considering ortho-para conversion, there were up to 30% increase in the work input per unit liquefied mass flow rate. When the ortho-para conversion was considered, FOM decreased to be about 0.031∼0.045.

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References

  1. Advances in Cryogenic Engineering v.37 Cryogenic Fuel Technology and Elements of Automotive Vehicle Propulsion Systems Peschka, W.
  2. Advances in Cryogenic Engineering v.35 Cryogenic Equipment of Liquid Hydrogen Powered Automobiles Ewald, R.;Kesten, M.
  3. Cryogenic Process Engineering Timmerhasu K. D.;Flynn T. M.
  4. Cryogenic Engineering Flynn, T. M.
  5. An Optimization Study of Liquid Hydrogen Boil-off Losses v.2 Gursu S.;Lordgooei M.;Sherifs A.;Veziroglu T. N.
  6. Cryogenics v.35 no.3 Neon Liquefaction System for High $T_c$ Experiments Richardson;Tavner A. C. R.
  7. Advances in Cryogenic Engineering v.41 Continuous flow cryogen sublimation cooler Longthworth R. C.;Khatri A.
  8. Korea Journal of Air-Conditioning and Refrigeration Engineering v.9 no.3 Basic design of hydrogen liqueier precooled by cryogenic refrigerator Kim, S. H.;Chang, H. M.;Kang, B. H.
  9. Korean Journal of Air-Conditioning and Refrigeration Engineering v.9 no.3 Performance experiment of a hydrogen liquefaction equipment by direct cooling Baik, J. H.;Kang, B. H.;Chang, H. M.
  10. Advances in Cryogenic Engineering v.41 Novel Method for Measurement of The Para-Content of A hydrogen-Stream Clausen, J.;Hofmann, A.;Wanner, M.
  11. Journal of the Korea Hydrogen Energy Society v.9 no.3 Design and performance evaluation of ortho-para H2 conversion equipment Baik, J. H.;Kang, B. H.
  12. Cryogenic System(2nd ed.) Barron, R. F.
  13. Advances in Cryogenic Engineering v.41 Supplemental Multiayer Insulation Research Facility Dempsey, P. J.;Stochl, R. J.
  14. Advances in Cryogenic Engineering v.41 Variable Density MLI Test Results Stochl, R. J.;Dempsey, P. J.;Leonard, K. R.;McIntosh, G. E.