Experimental Analysis of Heat Transfer of Residual Gas in Valve Body of Vacuum Valve

Liquid oxygen, liquid hydrogen after passing through the vacuum pipe and vacuum shut-off valve, 1-2 hours of vacuum valve residual gas leakage heat and normal temperature under the laminated lamination test, the experimental calculation results show that the interlayer low temperature pressure corresponding to the normal temperature pressure, and the interlayer The hydrogen content is closely related to the adsorption capacity of the adsorbent. If the loading amount of the adsorbent is sufficient, that is, the adsorbent can adsorb more gas at a lower temperature than the amount of non-condensable gas that may exist in the interlayer, in the liquid hydrogen transport. Can allow a slightly lower vacuum. At room temperature, the laminated heat is stronger than 40 Pa. The residual gas leakage heat has a nonlinear relationship with the pressure.

At the same time, the leakage heat of the residual gas is calculated and analyzed in the state of low pressure of the interlayer. The experimental results show that the leakage heat of the residual gas under low pressure is linear with the sandwich lamination. The sandwich lamination at normal temperature can reduce the variation of residual heat in the valve body. Lower.