Abstract 781,631. Storing gases under pressure. UNION CARBIDE & CARBON CORPORATION. Aug. 22, 1955 [Sept. 10, 1954], No. 24159/55. Class 8(2). A liquefied gas, e.g. oxygen container 11 mounted within and thermally insulated from a jacket 12 through which extends a filling and discharge tube 22 has a refrigerant container 28 in thermal contact with the liquid oxygen L ; the refrigerant being capable of change of state, e.g., from solid to liquid accompanied by absorption of heat at a temperature above the normal storage temperature of the liquid oxygen but below that at which the gas pressure is sufficient to open an automatic relief valve 25. A suitable refrigerant is dichlorodifluoromethane which is introduced as liquid through a duct 29 closed by a burstable disc 30. The container 28 is supported by braces 31 and container 11 by a tripod 16 within the jacket 12 which may be evacuated or filled with insulation. Charging with liquid oxygen is effected through the valved duct 22 until liquid issued from a trycock valve 27 and discharging is also effected through the duct 22 leading to a line 33 where it is joined by oxygen gas in a duct 40 connected to a gas release duct 24. The combined liquid and gaseous oxygen then traverses a vaporizing coil 35 surrounding the jacket 12 and is discharged as gas through a valved coupling 38. Alternatively the vapourizing coil is located within the jacket 12. In a modification the refrigerant is of the evaporative type, e.g. liquid nitrogen for use with argon in the container 11; the burstable disc being replaced by an automatic pressure relief valve 44<SP>1</SP>, Fig. 3 (not shown).
IN A SYSTEM FOR STORING LIQUEFIED GAS MATERIAL AND DISPENSING GAS THEREFROM, A THERMALLY INSULATED PRESSURE VESSEL FOR HOLDING A SUPPLY OF THE LIQUEFIED GAS UNDER PRESSURE, A REFRIGERATION COMPARTMENT IN THERMALLY CONDUCTIVE ASSOCIATION WITH THE LIQUEFIED GAS IN SAID VESSEL, AND MEANS FOR DISPENSING TAS MATERIAL AT LEAST FROM THE GAS PHASE OF SAID VESSEL TO A SERVICE CONNECTION UNDER HIGH PRESSURE AND TEMPERATURE CONDITIONS OCCURRING IN SAID VESSEL, SAID REFRIGERATION COMPARTMENT BEING SEALED AND HAVING A NON-CONSUMABLE REFRIGERANT CHARACTERIZED BY A HIGH LATENT HEAT OF PHASE CHANGE WITHIN THE TEMPERATURE AND PRESSURE RANGE OF THE LIQUEFIED GAS IN SAID VESSEL FOR REDUCING THE BUILDUP IN TEMPERATURE AND PRESSURE IN THE LIQUID BY ABSORPTION OF HEAT DURING PROLONGED PERIODS OF NON-DISPENSATION, AND FOR REDUCING THE DROP OF PRESSURE BY SUPPLYING HEAT DURING PERIODS OF DISPENSING.
Claim 2
Dependent Claim
136 words
IN A SYSTEM FOR STORING LIQUEFIED GAS MATERIAL AND DISPENSING GAS THEREFROM, A THERMALLY INSULATED PRESSURE VESSEL FOR HOLDING A SUPPLY OF THE LIQUEFIED GAS UNDER PRESSURE, A REFRIGERATION COMPARTMENT IN THERMALLY CONDUCTIVE ASSOCIATION WITH THE LIQUEFIED GAS IN SAID VESSEL, AND MEANS FOR DISPENSING TAS MATERIAL AT LEAST FROM THE GAS PHASE OF SAID VESSEL TO A SERVICE CONNECTION UNDER HIGH PRESSURE AND TEMPERATURE CONDITIONS OCCURRING IN SAID VESSEL, SAID REFRIGERATION COMPARTMENT BEING SEALED AND HAVING A NON-CONSUMABLE REFRIGERANT CHARACTERIZED BY A HIGH LATENT HEAT OF PHASE CHANGE WITHIN THE TEMPERATURE AND PRESSURE RANGE OF THE LIQUEFIED GAS IN SAID VESSEL FOR REDUCING THE BUILDUP IN TEMPERATURE AND PRESSURE IN THE LIQUID BY ABSORPTION OF HEAT DURING PROLONGED PERIODS OF NON-DISPENSATION, AND FOR REDUCING THE DROP OF PRESSURE BY SUPPLYING HEAT DURING PERIODS OF DISPENSING.