In the traditional method, as the loss product and gas are considered to be saturated, the heat leak of a cryogenic vessel is the latent heat of loss product. However, the temperature of loss product and gas exceeds the saturated temperature as measured in tests. Therefore, a portion of the heat leak is absorbed by the loss product when it diffuses into the gas phase of a cryogenic vessel in the storage process. In this study, the energy equations of the gas and liquid are established in cryogenic vessels during storage to investigate the actual heat leak of a cryogenic vessel in a storage process by considering the temperature distribution of the gas. Then, an experiment was conducted to demonstrate that the actual heat leak of a cryogenic vessel contains not only the latent heat but also the enthalpy change of the loss product, which is produced as it diffused into the gas phase. The results showed that the enthalpy change increased as the liquid level decreased and was critical for determining the actual heat leak in cryogenic vessels in the storage process, with a ratio of approximately 12% to the latent heat when the liquid level ratio is 85%.

中文翻译：

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低温容器储存过程中实际漏热的研究

在传统方法中，由于损失积和气体被认为是饱和的，因此低温容器的热泄漏是损失积潜热。然而，经测试测得，损失产物和气体的温度超过了饱和温度。因此，在储存过程中，当热量泄漏扩散到低温容器的气相中时，一部分热量被损失产物吸收。本研究建立了低温容器储存过程中气体和液体的能量方程，通过考虑气体的温度分布来研究低温容器在储存过程中的实际热泄漏情况。然后，进行了实验来证明低温容器的实际热泄漏不仅包含潜热，还包含扩散到气相时产生的损失产物的焓变。结果表明，随着液位的降低，焓变增大，对于确定低温容器在储存过程中的实际热泄漏至关重要，当液位比为85%时，其与潜热的比例约为12%。