低温液体无损贮存压力升高的实验与计算

Experiment and calculation to the pressure change in the process of cryogenic liquid non-loss storage

准确、简单地预测低温液体无损贮存时的压力升高具有重要的实用价值。对一低温容器利用液氮为介质进行了多次无损贮存实验,利用多元线性回归方法对实验数据进行分析和检验。分析表明无损贮存时间、初始充满率对压力升高的影响较大,而环境温度的影响可以忽略,并拟合出了压力升高的计算公式。计算结果和实验结果在很大范围内能够较好地吻合。该种计算方法在预测低温液体无损贮存压力升高时有较高的准确性与可靠性。

It is very important to predict exactly and easily the pressure change in the process of cryogenic liquid non - loss storage. Non - loss storage experiments were performed to a cryogenic vessel filled with liquid nitrogen, and a multivariate linearity regression analysis and check to the experimental data was also done. The result shows that storage time and initial filling rate have an obvious influence on the pressure change, but ambient temperature may be ignored. The equation of the pressure change was fitted, and the calculation results have good conformity with the experiments in a large range. This calcalation method possesses better accuracy and reliability to predict the pressure change in the process of cryogenic liquid non - loss storage.