Analysis of a new self-pressurization model for cryogenic fluid tank

In order to analyse the self-pressurization of the cryogenic fluid tank more accurately and further understand the law of the cryogenic fluid storage, a new self-pressurization model considering the temperature gradient of the vapour is presented. This model uses one-dimension method to deal with the vapour phase and lumped parameter method to deal with the liquid phase. Another two classical self-pressurization models are used to compare with this model. Based on this model, the comparison between the computation and the experimental results is conducted. The calculated results show that when the tank is in low fill level, the computation is in agreement with the experiment, but in high fill level the difference increases. Experimental results indicate that the new model can properly predict the pressurization curves of the tank.