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Design and Operation of a Small-Scale Hydrogen Liquefier
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소형 수소액화기 설계 및 운전에 관한 연구

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Type
Academic journal
Author
Journal
The Korean Hydrogen & New Energy Society Transactions of the Korean Hydrogen and New Energy Society Vol.26 No.2 KCI Accredited Journals
Published
2015.4
Pages
105 - 113 (9page)

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Design and Operation of a Small-Scale Hydrogen Liquefier
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In order to accelerate hydrogen society in current big renewable energy trend, it is very important that hydrogen can be transported and stored as a fuel in efficient and economical fashion. In this perspective, liquid hydrogen can be considered as one of the most prospective storage methods that can bring early arrival of the hydrogen society by its high gravimetric energy density. In this study, a small-scale hydrogen liquefier has been designed and developed to demonstrate direct hydrogen liquefaction technology. Gifford-McMahon (GM) cryocooler was employed to cool warm hydrogen gas to normal boiling point of hydrogen at 20K. Various cryogenic insulation technologies such as double walled vacuum vessels and multi-layer insulation were used to minimize heat leak from ambient. A liquid nitrogen assisted precooler, two ortho-para hydrogen catalytic converters, and highly efficient heat pipe were adapted to achieve the target liquefaction rate of 1L/hr. The liquefier has successfully demonstrated more than 1L/hr of hydrogen liquefaction. The system also has demonstrated its versatile usage as a very efficient 150L liquid hydrogen storage tank.
#극저온공학 #단열 #액체수소 #액화기 #Cryogenics #Insulation #Liquefier #Liquid Hydrogen

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References (9)

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S. Krasae-in / 2010 / Development of large-scale hydrogen liquefaction processes from 1898 to 2009 / International Journal of Hydrogen Energy 35(10):4524~4533 google schola B. H. Kang / 2001 / Liquid hydrogen storage technology / J. of the Korean Hydrogen Energy Society 12(2):87~102 google schola T. M. Flynn / 2005 / Cryogenic Engineering / CRC Press google schola NIST webbook google schola R. T. Jacobsen / 1997 / Thermodynamic properties of cryogenic fluids / Plenum Press google schola

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