ZBO存储低温储箱内的压力变化模拟分析

Modeling the pressure variation law of cryogenic tank in the process of ZBO storage

低温推进剂在存储过程中,由于和周围环境存在较大的温差,热量漏入储箱后引起的低温推进剂蒸发不可避免造成储箱内的温度和压力的升高。当压力超过一定值,需要定期排空,从而造成低温推进剂损失。ZBO存储技术通过低温制冷机移出漏入储箱内的热量,可以有效地避免低温推进剂的蒸发损失。对储箱的漏热量进行了计算,并且对ZBO存储过程中储箱内的温度和压力变化过程进行了模拟。

Because of obvious temperature difference with the surrounding environment in the storage process, cryogenic pro- pellant will evaporate inevitably lead to the temperature and the pressure increases in the tank. If the pressure beyonds a certain value, the high pressure gas needs to be discharged, inducing the losses of the cryogenic propellant. ZBO storage technology is u- ses cryocooler to remove the heat which leak into the tank. Adapting ZBO storage technology can efficiently avoid the losses of the propellant. This paper calculated the heat leakage of the tank, and modeled the variety process of the temperature and pressure in the tank.