A new method fast measure cryogenic vessel heat leakage

최초 등록일
2020.04.30
최종 저작일
2020.03
5페이지/파일확장자 어도비 PDF
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서지정보

발행기관 : 한국초전도저온공학회 수록지정보 : 한국초전도저온공학회논문지 / 22권 / 1호 / 24 ~ 28 페이지
저자명 : Zheng-Qing LI ,Xiao-Jin LI,Mo LIU

영어 초록

Heat leakage is an important parameter to reflect heat insulated performance of cryogenic vessel. According to the current standard requirements, it needs to measure the daily evaporation rate to indicate heat leakage. The test needs-over 24h after cryogenic vessel in heat equilibrium as standard required, therefore test efficiency is poor and new efficient method is required to cut test time. First of all, the volume of instantaneous evaporated gas and heat leakage are calculated by the current standard corresponding to the maximum allowable daily evaporation rate of cryogenic vessel. Depending on the relationship between real daily evaporation rate and maximum allowable daily evaporation rate of cryogenic vessel, we designed a new test method based on the pressure changes over time in cryogenic vessel to determine whether its heat insulated performance meets requirements or not. Secondly, the heat transfer process was analyzed in measurement of cryogenic vessel, and the heat transfer equations of whole system were established. Finally, the test was completed in four hours; meanwhile the heat leakage and daily evaporation rate of cryogenic vessel are calculated basing on test data.

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A new method fast measure cryogenic vessel heat leakage