Abstract:
A device for the elimination of heat transfer out of and/or into a body of liquid material, and particularly applicable to cryogens contained at low temperature. Surface tension phenomenon and pressure are employed in establishing a gas barrier between the liquid and the structural container therefor, the pressure being applied to the gas barrier from an external source or accumulated from said liquid as it is liberated from said contained body thereof. The said body of liquid is constrained within the confines of a porous membrane and out of contact with containment walls by means of an intervening body of restraining gas maintained within a range of pressured equilibrium with the pressure prevailing in the constrained liquid and preferably at a pressure equal to or less than the bubble-point pressure of said membrane. Unobvious practicality resides in embodiments of the foregoing concept wherein substantially complete structural isolation of liquid from containment walls is maintained, thereby minimizing heat transfer.
Abstract:
Tanks for the storage of liquefied gases at cryogenic temperatures are disclosed. The disclosed tanks comprise two concentric shells with dished ends. The internal shell is fabricated from layers of glass fabric with organosiloxane treatment. A layer of high tensile wire fabric is incorporated as one of the integral laminae of the internal and external shells. The internal shell is covered with an insulating layer of flexible and rigid urethane foam. This foam is fabricated in contoured or flat blocks of suitable size and shape to conform to the inner shell. The blocks may be separated from the inner shell by multiple layers of metallized polyethylene terephthalate (Mylar), or other material which will reflect radiant heat.
Abstract:
A pallet suitable for supporting and transporting gas cylinders or like articles includes a baseplate (for supporting the articles) and, on top of this baseplate, a pair of tunnels for receiving the tines of a forklift truck plus a pair of upstanding frameworks at respective opposite sides of the plate, for stabilizing the upper ends of the elongated articles.
Abstract:
A cryogenic storage tank is disclosed having a bottom, a sidewall and a domed roof supported thereby, and an insulated false ceiling mounted on the sidewall and dividing the tank into a lower storage space and a dome vapor space and supported at its center by a support column, the ceiling being imperforate except for a foraminous portion allowing passage of vapors therethrough. There also is disclosed a double-vaportight sidewall with insulation therebetween and a purge space above the insulation communicating with the dome vapor space by way of openings in the inner sidewall.
Abstract:
In a cryogen-pumping system, the formation of vapor due to heat leak, especially, causes cavitation in the pump. A separator is provided to separate the cryogen vapor from the liquid. Then the vapor is expanded in a heat exchanger to subcool the cryogen liquid upstream of the pump.
Abstract:
A tank for use in storing low temperature liquefied gas having a rigid outer vessel lined with a heat insulating layer and an inner vessel of a thin film construction with gently undulated camber. The peripheral dimensions of the material of the inner vessel are made relatively larger than those of the inner peripheral dimensions of the insulating layer of the outer vessel. The camber serves to relieve the hoop stress acting upon the inner vessel when it is subjected to the load resulting from the low temperature liquefied gas.
Abstract:
A low-temperature liquefied gas storage tank comprising an outer tank made of rigid metals and an inner tank having a thin film construction. The inner tank is provided at its upstanding peripheral inside surface with vertically extending corrugations and includes means for suspending its upper peripheral edge so as to permit contraction and expansion of the inner tank when it is subjected to a liquid load or exposed to a low temperature. The inner tank prevents undesirable cracking and damage thereof and can store the low-temperature liquefied gas in a safe manner.
Abstract:
A portable container housing compressed gas and having valve means for automatically transferring the contents of the container directly to a vehicle tire or similar device requiring inflation upon coupling the container valve means to the valve of the tire or other device.
Abstract:
A LIQUID STORAGE CONTAINER INCLUDES INNER AND OUTER VESSELS SPACED FROM ONE ANOTHER TO DEFINE AN INSULATING SPACE THEREBETWEEN. IN ONE FORM OF THE INVENTION, THE SIDE WALLS OF THE INNER AND OUTER VESSELS EACH HAVE RESILIENT BLANKET MEANS DISPOSED ADJACENT THERETO AND DEFINING A SPACE THEREBETWEEN. THE SPACE BETWEEN THE RESILIENT BLANKET MEANS IS FILLED WITH A MASS OF SUBSTANTIALLY FREEFLOWING LIGHTWEIGHT THERMAL INSULATING MATERIAL. THE ROOF OF THE INNER VESSEL IS SUPPORTED BY SUPPORT MEANS DISPOSED WITHIN THE INNER VESSEL AND EXTENDING VERTICALLY UPWARDLY THEREWITHIN. A ROOF OF THE OUTER VESSEL IN ANOTHER FORM OF THE INVENTION IS SUPPORTED BY SUPPORT MEANS SUPPORTED BY THE ROOF OF THE INNER VESSEL. FURTHER MODIFICATIONS OF THE INVENTIONAL INCLUDE A VESSEL HAVING ONLY ONE SIDE WALL WITH INSULATING MEANS DISPOSED IN SURROUNDING RELATIONSHIP TO THE SIDE WALL AND HELD IN PLACE ADJACENT THE OUTER SURFACE THEREOF.