Design and Operation of a Small-Scale Hydrogen Liquefier

Title
Design and Operation of a Small-Scale Hydrogen Liquefier
Authors
백종훈강상우강형묵나다니엘 갈소김서영오인환
Keywords
Liquid Hydrogen(액체수소); Liquefier(액화기); Cryogenics(극저온공학); Insulation(단열)
Issue Date
2015-04
Publisher
Transactions of the Korean Hydrogen and New energy society (한국수소및신에너지학회논문집)
Citation
VOL 26, NO 2, 105-113
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/50220
ISSN
17387264
Appears in Collections:
KIST Publication > Article
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