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Substance loss is minimized in a station for loading a container with cryogenic substance stored in a tank. A throttle vent valve is provided at the outlet vent of a container being loaded for controlling the differential pressure between the storage tank and the container. The throttle vent valve i

Substance loss is minimized in a station for loading a container with cryogenic substance stored in a tank. A throttle vent valve is provided at the outlet vent of a container being loaded for controlling the differential pressure between the storage tank and the container. The throttle vent valve is adjusted to maintain the differential pressure at a value equal to the optimum differential pressure for minimizing substance loss. The optimum differential pressure is selected by determining the filling loss for a plurality of values of differential pressure and selecting the differential pressure which produces the minimum filling loss.

대표청구항 ▼

A method for minimizing cryogenic substance loss in a filling station having a storage tank storing cryogenic substance for loading a container having an outlet vent with a throttle vent valve for adjusting the differential pressure between the substance being loaded and the container, comprising th

A method for minimizing cryogenic substance loss in a filling station having a storage tank storing cryogenic substance for loading a container having an outlet vent with a throttle vent valve for adjusting the differential pressure between the substance being loaded and the container, comprising the steps of: (a) first determining a value of filling loss for each of a plurality of values of differential pressure; (b) selecting and storing prior to loading an optimum value of differential pressure from the plurality of values to produce the minimum filling loss; (c) loading substance into a container; (d) continuously monitoring the differential pressure during loading; (e) comparing the monitored differential pressure to the optimum differential pressure; (f) adjusting the throttle vent valve to maintain the monitored differential pressure at a value substantially equal to the optimum differential pressure value; (g) selecting at least one new optimum value of differential pressure during loading of the container; (h) adjusting the throttle vent valve to bring the differential pressure to a value substantially equal to the new optimum differential pressure value during loading of the container; and (i) repeating steps (g) and (h) until the filling process is terminated.