Abstract:
A multivalve with a storage bag and a storage bag configured for temporarily accommodating a liquid gas fuel around a discharge for a liquid gas fuel store formed from a deformable memory material, wherein the storage bag has a temporary, size-reduced position, an outer diameter of the storage bag then being less than 48 mm, and a second, operative position, the storage bag having a sufficient volume. A multivalve with a storage bag includes a storage bag having a bottom with sides rising from the bottom, a one-way valve being placed in or close to the bottom and connected to an inlet in the storage bag, the one-way valve being welded to the plastic of the storage bag.
Abstract:
A method of generating a high-level vacuum comprises evacuating a chamber having a substantially-pure gas therein to a medium-level vacuum, and freezing the residual gas to generate the high-level vacuum within the chamber. Impurities, such as atmospheric air, may be purged from the chamber by evacuating the chamber to a medium level vacuum (e.g., around 10−2 Torr) and subsequently filling the chamber with the gas. This purging process may be repeated multiple times to decrease the level of impurities in the gas filling the chamber. The substantially-pure gas may have an impurity-level of less than approximately 100 PPM and may comprise carbon-dioxide, although the scope of the invention is not limited in this respect. The medium level vacuum may range between approximately 1×10−2 Torr and 5×10−2 Torr allowing the use of a roughing pump, and the high-level vacuum may range between approximately 1×10−5 and 1×10−8 Torr.
Abstract:
A hydrogen storage and delivery system is provided having an orifice pulse tube refrigerator and a liquid hydrogen storage vessel. A cooling system, coupled to the orifice pulse tube refrigerator, cools the vessel and abates ambient heat transfer thereto in order to maintain the liquid hydrogen in the vessel at or below its saturation temperature. Hydrogen boil-off, and the necessity to provide continuous venting of vaporized hydrogen are minimized or avoided. In a preferred embodiment, the hydrogen storage vessel has a toroidal shape, and the pulse tube refrigerator is a two stage pulse tube refrigerator and extends within a central void space defined at the geometric center of the toroidal storage vessel. Also in a preferred embodiment, the cooling system includes first and second thermal jackets, each having a substantially toroidal shape and enclosing the storage vessel, wherein each of the thermal jackets is thermally coupled to one of the first or second stages of the pulse tube refrigerator in order to cool the vessel and to abate ambient heat leak thereto. The hydrogen storage and delivery system is particularly suitable for use in vehicles, such as passenger automobiles.
Abstract:
This invention concerns improvements to toroidal-shaped L.P.G. tanks (1) which, due to their particular shape, may be easily placed inside the spare wheel compartment (10). In the toroidal-shaped tank described herein, the hollow center of the tank is used for positioning the valve group connection rings (3), which may either project or be flush-mounted and also for allowing the passage of the pipes (4, 5) for connecting the tank with the engine fuel supply system and the filler. The valves are placed between a lid (6), at the top, and a bottom plate (7) tide to each other in such a manner as to constitute an airtight chamber.
Abstract:
Improved process for evacuating the thermally insulating jacket of a dewar having an inner wall and an outer wall, with the inner space between said walls completely or partially filled with an insulating material, containing also a moisture sorbing material and a getter material, in which said moisture sorbing material is a chemical drying agent.
Abstract:
A high pressure vessel assembly includes a central pivot tank and coaxial or concentrically disposed tanks for liquid or gas storage with or without gaseous phase cooling. The pivot tank comprises a cylindrically shaped wall having torus-shaped ends and is surrounded by an annularly shaped internal tank having internal and external walls with the former being joined to the pivot tank by bands adjacent the tank ends to provide an intermediate chamber. A larger diameter external tank likewise of annular configuration, surrounds the internal tank and is also joined thereto in a manner providing an intermediate chamber. A fitting projecting from the ends of all three tanks at one end of the assembly permits filling or emptying of the respective tanks while a separate discharge pipe projecting from the internal and external tank ends communicates with the two chambers to carry away any fluid leaking from the juxtaposed peripheral walls of the tanks.
Abstract:
A cryogenic fuel tank of a cylindrical design having toroidal surface ends, is suspended in aircraft structure through a central front mount member; and the rear tank is supported by rod elements which extend from a mounting ring about the tank, to mount points rearwardly within the interior of the fuselage. The central front mount member has baffles attached thereto, so as to prevent undue sloshing of the liquid within the tank. The front end of the tank suspension absorbs radial and axial loads, but no bending moments; and the aft linkage suspension arrangement takes primarily radical and torsional loads. Also the aft suspension provides for unrestrained axial and radial contraction and expansion of the outer shell of the tank.