Study on influence factors of self-pressurization time in LNG satellite station

The self-pressurization of liquid pressurization mode is widely applied in LNG satellite station, the self-pressurization ability of which depends on the required self-pressurization time. Taking the LNG satellite station as objective, four thermodynamic models for non-destructive storage of cryogenic liquids are compared and the Three-Zone model is selected for calculation. Based on the genetic algorithm, the program is designed to calculate with the equation discretized in the way of the first order forward difference and the change of required self-pressurization time in different tank initial pressure, initial filling rate and the temperature of self-pressurization gas are obtained. The results show that with the increasing required pressure of the tank, the effect of these three factors on the self-pressurization time of the tank increases in different degrees, in which the filling rate of the tank has an obvious effect on the self-pressurization time, and the time can be shortened by 78.4% at most.