METHOD AND DEVICE FOR DETERMINING THE FILLING MASS OF A CRYOGENICALLY STORED GAS IN A CONTAINER

摘要

The invention relates to a method for determining a filling mass in a thermally insulated container for a cryogenically stored gas, wherein the filling mass is determined by way of a known container volume and a calculated density of the gas content of the container, the value of which is calculated from a container pressure measurement and a temperature measurement. The method is characterized in that a temperature sensor is used for measuring a mixing temperature of a liquid and a gaseous phase of the gas. The liquid phase is extracted by way of a first extraction supply line at the geodetically lowest point, and the gaseous phase is extracted by way of a second extraction supply line at the geodetically highest point of the container cavity. Downstream of the extraction points, after a convergence of the first and the second extraction supply line to a single extraction supply line leading out of the container, inside or outside thereof, the temperature sensor is placed where a complete and thorough mixing of the liquid and the gaseous phase of the gas from the first and second extraction supply line has already taken place.