液氢储罐的静置升压规律

Pressure rise performance of LH 2 tank in static storage

为了掌握液氢在储罐中密闭静置升压的特性,开展了理论和试验研究。使用一台容积为4.0 m^(3)液氢储罐,先后开展了液氮、液氢的蒸发率测试和升压试验;基于静态蒸发率测试值,根据饱和均质模型和俄罗斯模型分别计算了液氮、液氢的升压时长。与试验结果相比,根据饱和均质模型计算的液氮、液氢升压时长偏差较大,而根据俄罗斯模型计算的液氮、液氢升压时长偏差较小(分别为+7.5%和-5.4%)。进一步地,基于俄罗斯模型,计算了从0.10 MPaA到1.0 MPaA的液氢升压曲线,结果表明升压时长和储罐压力呈明显的线性关系(R^(2)=0.9996),这为今后开展更长周期的液氢储罐升压试验提供了基础。

In order to grasp the pressure rise characteristics of liquid hydrogen in storage tanks,theoretical and experimental studies were carried out.A 4.0 m^(3)liquid hydrogen storage tank was employed to carry out the evaporation rate test and pressure rising test of liquid nitrogen and liquid hydrogen.Based on the static evaporation rate test values,the pressure rising time of liquid nitrogen and liquid hydrogen was calculated according to the saturation homogeneous model and the Russian model respectively.Compared with the test results,the deviation of the pressure rising time of liquid nitrogen and liquid hydrogen calculated according to the saturation homogeneous model is large,while the deviation of the pressure rising time of liquid nitrogen and liquid hydrogen calculated according to the Russian model is small(+7.5%and-5.4%,respectively).Further,based on the Russian model,the liquid hydrogen pressure rising curve from 0.10 MPaA to 1.0 MPaA was calculated,and the results show that the pressure rising time is highly linear with the tank pressure(R^(2)=0.9996),which provides a basis for carrying out longer-term liquid hydrogen tank pressure rising tests in the future.