A vehicle mounted monitoring system for removable propane tanks includes a propane tank holding system, at least one tank measuring sensor, a hard-wired vehicular power connection, a main control module, and a vehicular display module. The propane tank holding system includes at least one resting bracket so that a propane tank can be placed and secured. The tank measuring sensor is operatively coupled to the resting bracket to measure the remaining amount of liquid in the propane tank. The hard-wired vehicular power connection is electrically connected to the tank measuring sensor for continuous operation. The tank measuring sensor is electronically connected to the vehicular display module through the main control module so that the user can be informed.

The present disclosure provides a high-pressure hydrogen apparatus gas seal member which is excellent in durability and is capable of sufficiently suppressing an occurrence of a blister fracture. A high-pressure hydrogen apparatus gas seal member of the present disclosure is a high-pressure hydrogen apparatus gas seal member made of a crosslinked product of an elastomer composition which comprises an elastomer and fibrous carbon nanostructures having an average length of 100 μm or more and 1000 μm or less, wherein the fibrous carbon nanostructures have a surface fractal dimension of 2.3 or more and 3.0 or less or a radius of gyration of 50 nm or more and 500 nm or less, and further the fibrous carbon nanostructures has an inner diameter of 4.0 nm or less.

A service providing mobile unit 1 comprised of a frame 2 forming a ring shape about a horizontal axis, movement-use wheels 4, 5 attached to the bottom part of the frame 2, a hydrogen storage tank insert pan 10 formed inside the frame 2, and a fuel cell 40 arranged inside the frame 2. Hydrogen is supplied to the fuel cell 40 from a replaceable hydrogen storage tank 20 inserted into the hydrogen storage tank insert part 10. A service providing space 3 having a ring-shaped inner circumference surface of the frame 2 as its outer edges is formed by the frame 2, and power can be supplied from the fuel cell 40 to a service providing unit installed inside the service providing space 3.

A high-pressure tank includes: a liner including a body portion having a tubular shape and side end portions each having a dome shape, the side end portions being provided on opposite sides of the body portion; and a reinforcement layer made of fiber reinforced resin covering an outer surface of the liner. The reinforcement layer includes a tubular member covering the body portion and dome members joined to opposite sides of the tubular member so as to cover the side end portions. The liner includes a first resin layer defining a storage space for storing gas and a second resin layer provided between the first resin layer and at least the tubular member. An elastic modulus of a second resin constituting the second resin layer is lower than an elastic modulus of a first resin constituting the first resin layer.

A computer-implemented method of supplying a fuel gas to a fueling system is disclosed. The method may include pre-fill inerting the fueling system; leak-checking the fueling system; charging a pilot subsystem with the fuel gas; filling the fueling system with the fuel gas; and post-fill inerting the fueling system. In many implementations, the fueling system may be associated with a boat. The fuel gas may be hydrogen and may be supplied to a fuel cell that converts the hydrogen to electrical energy to power a propulsion system of the boat.

Provided are a method and apparatus for calculating a volume of a compressed gas storage vessel, a computer, and a medium. According to the method, three test vessels with known volume and initial pressure are used to establish a pressure equilibrium with a compressed gas storage system, and pressure values in three equilibrium states are respectively detected. In this way, according to the three pressure values and the known volumes and initial pressures, a volume of the compressed gas storage system, a volume of a hose, and a pressure value of the compressed gas storage system in an initial state can be quickly and accurately calculated. By accurately obtaining the volume of the compressed gas storage system, the volume of the hose, and the pressure value of the compressed gas storage system in the initial state, a refueling rate can be increased as much as possible while ensuring safe refueling.

Multilayer structure for transporting hydrogen, including, from the inside, at least one sealing layer and at least one composite reinforcing layer, an innermost composite reinforcing layer being wound around an outermost adjacent sealing layer, the sealing layers of a composition predominantly of at least one semi-crystalline, long-chain polyamide thermoplastic polymer P1i (i=1 to n, n being the number of sealing layers), the Tf of which, as measured according to ISO 11357-3: 2013, is greater than 160° C., with the exception of one polyether block amide (PEBA), up to 50% by weight of impact modifier relative to the total weight of the composition and up to 1.5% by weight of plasticiser relative to the total weight of the composition, the composition being free of nucleating agent, and at least one of the composite reinforcing layers being of a fibrous material.

A multiple storage tank system includes: storage tanks in which cryogenic fluid is stored; discharge lines connected to the storage tanks to discharge the stored cryogenic fluid or introduce cryogenic fluid; a supply line connected to the discharge lines and a supply target to supply the discharged cryogenic fluid to the supply target; a build-up line branching off the supply line to control internal pressure of a first storage tank of the storage tanks; and a gas transfer line connected to the storage tanks to transfer gas inside the storage tanks, wherein when the internal pressure of the first storage tank is controlled while the cryogenic fluid passes through the build-up line, gas inside the first storage tank is transferred to at least one other storage tank through the gas transfer line so that internal pressure of the at least one other storage tank is controlled.

A composite pressure vessel assembly includes a plurality of lobes, each of the lobes having at least one interior wall and at least one curved wall, the plurality of lobes being positioned in a side by side arrangement and extending in a longitudinal direction from a first end to a second end. Also included is a plurality of end caps disposed at the ends of the lobes, wherein the plurality of lobes and end caps are formed of at least one fiber-reinforced polymer. A method of manufacturing a composite pressure vessel assembly is provided. The method includes forming a plurality of lobes consisting of at least one fiber-reinforced polymer. The method also includes forming a main body with the plurality of lobes, the lobes disposed in a side by side arrangement.

A multilayer structure for transporting hydrogen, including, from the inside, a sealing layer and at least one composite reinforcement layer, an innermost composite reinforcement layer being wound around the sealing layer, the sealing layer being a composition predominantly of: a polyamide thermoplastic polymer PA11, up to less than 15% by weight of impact modifier, up to 1.5% by weight of plasticizer relative to the total weight of the composition, the composition being devoid of nucleating agent and of polyether block amide (PEBA), and at least one of the composite reinforcement layers being a fibrous material in the form of continuous fibers, which is impregnated with a composition predominantly of at least one polymer P2j, (j=1 to m, m being the number of reinforcement layers), the structure being devoid of an outermost layer and adjacent to the outermost layer of a composite reinforcement layer made of a polyamide polymer.