A pressure vessel for storing fuel includes a liner for storing the fuel, a fiber-reinforced layer that surrounds at least some areas of the liner, and at least one domed cap which at least partially covers an end of the liner. Connection pins project from the surface of the domed cap. The connection pins protrude from the fiber-reinforced layer.

A service device for a pressure vessel system of a motor vehicle includes a service-device-side refueling coupling part which is connectable to a motor-vehicle-side refueling coupling part of the motor vehicle and a controller for activating the pressure vessel system. A method for the service of the pressure vessel system includes producing a connection between the service device and the pressure vessel system and activating the pressure vessel system by the service device.

A method optimizes the cryogenic pressure tank fill level which can be achieved during a refill in a motor vehicle. A heating device for heating a gas in the pressure tank has at least two modes, namely a regular operating mode, in which the heating device heats the gas in the pressure tank such that a specified pressure of the gas in the pressure tank is reached, and a continuous operation mode in which the heating device constantly heats the gas in the pressure tank such that the pressure of the gas in the pressure tank rises above the specified pressure. The method has the following steps: detecting the density of the gas in the pressure tank; comparing the detected density of the gas in the pressure tank with a specified density value; and if during the comparison it is determined that the detected density falls below the specified density value, either operating the heating device in the regular operating mode or switching the heating device from the regular operating mode to the continuous operation mode, in particular on the basis of a specified path to the destination of the motor vehicle and the service stations provided on the specified path to the destination for refilling the pressure tank with gas.

Provided is an energy storage structure, comprising a housing and a piston. An accommodating cavity and a piston cylinder part communicating with each other are arranged within the housing. The piston is slidably and sealingly arranged within the piston cylinder part for transferring impact energy. A self-pressure of an energy storage medium, arranged within the accommodating cavity and the piston cylinder part, acts on the piston, tending to push the piston to move. An energy storage structure provided by the present invention has a simple structure, is convenient for use, and can ensure that a thrust or impact force remains unchanged or slightly changes during operation, to achieve stable release of potential energy. Moreover, the adjustment of the thrust or impact force can be achieved by changing the temperature of the energy storage medium in the accommodating cavity, thereby achieving change in total impact energy of the energy storage structure.

A fluid system for a vehicle is provided. The fluid system is configured to couple to a chassis of the vehicle. A frame assembly of the fluid system is configured to couple with the chassis directly or with another component that is coupled, directly or indirectly, with the chassis. A cowling of the fluid system can enclose a fuel pressure vessel and an auxiliary fluid vessel. The auxiliary fluid vessel is configured to be placed in fluid communication with the component powered or operated by the fluid therein.

A method is provided for producing a tank, in particular a motor vehicle tank, for storing a fuel in a low-temperature state. The tank has an inner tank receiving the fuel, an outer skin surrounding the inner tank and an insulating layer arranged between the inner tank and the outer skin. The method i) introduces fuel into the inner tank, a temperature of 30 C. to 120 C., preferably of 70 C. to 85 C., being obtained by the fuel in the inner tank, and ii) generates negative pressure in an insulating layer arranged between the inner tank and the outer skin.

A cryogenic fluid storage unit comprises: an internal reservoir, internally delimiting a storage volume for storing the cryogenic fluid, and an external reservoir inside which the internal reservoir is arranged. An intermediate space separates the internal reservoir from the external reservoir. A thermal insulation is interposed between the internal reservoir and the external reservoir. A a getter is received in a volume in fluidic communication with the intermediate space, and the external reservoir has an opening for extracting the getter, and a removable cover closes the opening.

An operating method is provided for a fuel cell system, in particular a fuel cell system in a motor vehicle. The system includes a cooling system via which waste heat of fuel cells of the fuel cell system is ultimately dissipated into the surrounding air, and a tank withstanding an internal pressure of the order of 150 bar and more. In the tank, fuel for the fuel cell system is stored in the cryogenic state, in particular as a cryogen, which tank has a heat exchanger in its storage volume, via which, in order to compensate for the pressure reduction resulting from the removal of fuel from the tank, heat can be supplied to the stored fuel in a controlled manner by way of a heat transfer medium. At operating points or in operating states of the fuel cell system in which the waste heat of the fuel cell system cannot be dissipated to the surroundings to the required extent, at least a portion of the waste heat from the fuel cells is supplied to the heat exchanger in the tank storing the fuel until a predefined limit value for the internal pressure in the tank is reached.

In the case of a storage vessel of cryogenic gas or cryogenic compressed gas, particularly a cryo-pressure tank for a motor vehicle, having a storage volume for accommodating the stored gas, a mixing device is provided in the storage volume for mixing the gas stored in the storage volume.

Embodiments described herein relate to DAC of CO.sub.2 and the associated adsorption, desorption, or regeneration, and storage of the CO.sub.2. In some embodiments, a system can include a contactor including a chemical medium including the adsorption medium, the adsorption medium configured to adsorb CO.sub.2 from ambient air; a circulator configured to circulate a buffer fluid to desorb CO.sub.2 from the adsorption medium to produce dilute CO.sub.2; and a storage volume configured to store the dilute CO.sub.2. In some embodiments, the dilute CO.sub.2 can have a concentration between about 0.5% and about 60% by volume. In some embodiments, the dilute CO.sub.2 can be stored in the storage volume in the form of liquid CO.sub.2, gaseous CO.sub.2, supercritical CO.sub.2 and/or CO.sub.2 dissolved in water. In some embodiments, the contactor can include a porous honeycomb monolith contactor, the porous honeycomb monolith contactor having chemical media including the adsorption medium impregnated therein or coated thereon. In some embodiments, the chemical media can include an amine, a carbonate, and/or an alkaline solvent.