Disclosed is a tank device (1) for temperature pressure relief in a hydrogen tank, the tank device (1) comprising at least two tank containers (10) and a supply line (4) that can be connected to the tank containers (10). Each of the at least two tank containers (10) includes at least one shut-off valve (8) at one end (26), said shut-off valve (8) being located between the tank container (10) and the supply line (4). Furthermore, the tank containers (10) are entirely surrounded by a housing element (12) and/or encapsulated, in particular pressure-tightly, towards the surroundings (120) by means of the housing element (12), and at least one sacrificial container (14) is arranged in the tank device (1), said sacrificial container (14) being fluidically connected to the tank containers (10) via a pressure relief valve (13).

A cryogenic delivery tank includes a vessel having inner and outer shells and an interior that may contain a cryogenic liquid with a headspace above. A transfer pipe passes through the interior of the vessel and includes a head space coil positioned within an upper portion of the interior and a liquid side coil positioned in the lower portion of the interior. The transfer pipe has a first port adjacent to the head space coil and a second port adjacent to the liquid side coil. The first and second ports of the transfer pipe are configured to be removably attached to a second tank.

Systems and methods are provided for managing health of electrolytes of redox flow battery system. Components of the system may include a redox rebalancing cells and a gas storage system. The redox rebalancing cell may be operated by plating iron on a plating electrode, treating a negative electrolyte of the redox flow battery system with the plated iron and returning the negative electrolyte to an electrolyte tank. The gas storage system may include a set of expandable gas storage tanks coupled to at least one electrolyte storage tank and an electrolyte rebalancing system of the redox flow battery system.

Systems and methods are provided for managing health of electrolytes of redox flow battery system. Components of the system may include a redox rebalancing cells and a gas storage system. The redox rebalancing cell may be operated by plating iron on a plating electrode, treating a negative electrolyte of the redox flow battery system with the plated iron and returning the negative electrolyte to an electrolyte tank. The gas storage system may include a set of expandable gas storage tanks coupled to at least one electrolyte storage tank and an electrolyte rebalancing system of the redox flow battery system.

A system for storing air at high pressure underground or underwater includes a plurality of arrays of air tanks, each tank configured to store compressed air at a pressure of at least 40 bar. A piping system connects between an outlet of each air tank, the piping system further including at least one central port for delivering compressed air to and from a respective array. A storage receptacle surrounds the arrays and piping system, protecting the arrays and piping system from an external environment, and thermally insulating the arrays and piping system. A liquid bath is arranged within the storage receptacle. A heat exchanger is configured to maintain a temperature of the liquid bath substantially constant. The storage receptacle may be comprised of plastic pieces welded together in a modular fashion. Each piece may be a cylindrical tube configured to receive therein one or more of the arrays.

Disclosed herein is a system for storing gas at almost constant pressure, which involves the injection and withdrawal of a liquid in a process known as hydraulic compensation. This disclosure teaches a way to minimize that dissolution by ensuring that, as the gas containment is charged up, the hydraulic compensation liquid emerges from the containment at the gas storage pressure and the pressure of that liquid is caused to fall in a number of discrete steps with settling volumes present at the nodes between these steps. These settling volumes enable some gas to come out of solution at each node having lost relatively small amounts of pressure. The gas is compressed back up to storage pressure and re-injected into the main storage containment without significant use of energy.

An apparatus comprises a plurality of substantially cylindrical pressure vessel structures. Each cylindrical pressure vessel structure has first and second opposite ends. A first cap is positioned at the first ends of the plurality of cylindrical pressure vessel structures. The first cap includes a first dome-shaped protrusion that corresponds to each of the first ends. A first saddle is defined between adjacent first dome-shaped protrusions. A second cap is positioned at the second ends of the plurality of cylindrical pressure vessel structures. The second cap includes a second dome-shaped protrusion that corresponds to each of the second ends. A second saddle is defined between adjacent second dome-shaped protrusions. A reinforcement structure extends around the first and second caps, and is disposed within one of the first saddles and one of the second saddles.

A fuel gas storage and supply system that supplies fuel gas to a fuel cell includes: a filling port including a first check valve; a decompression valve; a fuel gas pipe; an upstream shut valve disposed between an upstream gas tank and the filling port; a second check valve disposed between the filling port and the upstream shut valve; a pressure sensor disposed between the upstream shut valve and the decompression valve; and a controller configured to control opening and closing of the upstream shut valve using a measured pressure value of the pressure sensor. The controller repeatedly acquires the measured pressure value from the pressure sensor over time when the upstream gas tank is filled with the fuel gas via the filling port and closes the upstream shut valve when an increasing rate of the measured pressure value is less than a predetermined increasing rate threshold value.

Reinforcement layers are each formed in a belt shape set with a smaller width than a diameter dimension of a container body. Each reinforcement layer has its length direction along an axial direction of the container body and spans between one axial direction side end and another axial direction side end of the container body, including at caps. Moreover, the reinforcement layers span across the caps and the container body at locations other than maximum diameter portions, these being locations where the diameter dimensions of the cap and the container body are greatest in a direction orthogonal to a direction of adjacency of the container body with other container bodies as viewed along the axial direction.

The invention relates to a tank comprising a container with an opening and a cover, a flexible casing lying against the interior and exterior of the container. This allows increased resistance to the penetration of sharp objects, liquid and gaseous gases can be used interchangeably and various gas types with a fossil-type and biological-type consistency can be mixed and also heated and cooled in the tank. The invention relates to tanks (1) and staged tanks of the preceding claims, characterized in that in addition to LNG, said tanks can store biological methane gas.