低温储罐气相空间漏热的理论研究

The analysis of the heat leakage rate in gas space in a cryogenic tank

低温液体在储罐内的无损储存时间是低温储运过程中非常值得关心的一个问题,而漏热量的准确确定是预测无损储存时间的关键因素。使用了大空间自然对流换热模型,对气相空间的漏热进行了研究,在此基础上,提出新的无量纲数G l。并在总结分析的基础上给出了适合工程应用的气相漏热计算公式和气相漏热实用估算表。

The cryogenic liquid＇s ventless storage duration in a tank is a big problem during the storage and transportation process. The accurate calculation of heat leakage rate is a key factor for predicting the ventless duration. The Natural Convection Model in inffinite space was adopted for studying the heat leakage rate in gas space, and a new dimensioaless number GI was proposed. At last, the applied formtda and the applied estimate table for gas spaceg heat leakage rate for all cryogenic liquid was preseuted based on all this stndies.