System and method for dispensing cryogenic liquids

摘要

A system for dispensing cryogenic liquid to a use device tank from a bulk storage tank containing a supply of cryogenic liquid features a pump in communication with the bulk storage tank, a dispensing line in communication with the pump and a heater in communication with the dispensing line. A system control device controls the operation of the pump and heater. A liquid level sensor and temperature or pressure sensor communicate with the use device tank and the system control device and the system control device. As a result, the conditions of the cryogenic liquid initially in the use device tank may be used by the system control device to calculate the appropriate amount of cryogenic liquid and heat that should be added to the cryogenic liquid as it is dispensed so that the use device tank becomes substantially filled with saturated cryogenic liquid. A liquid level sensor may alternatively be used as the sole use device tank sensor.