Abstract
The liquefied gas has been widely used in modern chemical, energy and environment protection industries. To support the integrity management and risk assessment of liquefied gas storage tanks, it is necessary to study the leakage process of liquefied gas with limited holes. There are few researches about the liquefied gas leakage rate from the crack. At present, most measurement methods used to measure leakage rate are flow meter or weighing before and after discharge, which are not suitable for liquefied gas discharge. The discharge of liquefied gas can easily form a two-phase flow in the crack and cannot be measured by the flow meter. However, the method of weighing before and after discharge cannot measure the leakage rate in real time. To realize the leakage rate real-time, online measurement, the new liquefied gas leakage rate measurement device was set up in this study. And the detachable crack leakage modules with different diameters were designed and manufactured. Using R134a refrigerant as leakage experiment medium, the relationship between crack morphology, size, pressure and leakage rate of liquefied gas was studied on the liquefied gas leakage measurement device. The new device can be used as an experimental test platform for evaluating the consequences of different liquefied gas discharge accidents or optimizing the leakage flow coefficient of the specific leakage situation, so as to better simulate the liquefied gas discharge accidents.