A method for filling tanks with pressurized gas via a filling station comprising several storage containers and a fluid circuit for transferring the gas from the containers to the tanks, the circuit comprising a first end to which the containers are linked in parallel and a second end provided with a transfer line intended to be connected to the tank(s) to be filled, the circuit comprising, arranged in series between the first end and the second end, a first isolation valve, a flow or pressure regulation member, and a second isolation valve, the method comprising filling a first tank, characterized in that, on completion of the filling of the first tank and before filling a second tank, the first and second isolation valves are closed to trap a supply of pressurized gas in the circuit between said two valves and in that the supply of gas is used to refill at least one of the containers.

A gas supply regulation assembly includes at least one inlet capable of being in fluid communication with at least one gas bottle and an outlet capable of being in fluid communication with a gas-consuming appliance. The gas supply regulation assembly further includes a gas pressure detection device for detecting gas pressure in a chamber communicating with the outlet.

A dynamic control valve assembly for use in filling a liquid carbon dioxide storage and gas delivery system is provided, the assembly comprising: a valve body; an end nut with an inlet port for receiving liquid carbon dioxide; a chamber; an inlet cavity; a liquid port; a gas port; and a dynamic compound valve stem assembly for blocking the gas port while liquid carbon dioxide is delivered through the inlet port and allowing the liquid carbon dioxide to flow through the liquid port for storage in a liquid cylinder, and open the gas port and block the inlet port in order to allow carbon dioxide gasses from boiling liquid carbon dioxide within the liquid cylinder to pass through the gas port for storage in a gas cylinder until system pressure and temperature equilibrium is reached. The dynamic compound valve stem assembly comprises: a stem body having an inlet port poppet and a gas port poppet; an inlet cavity collar; and in some embodiments a collar biasing spring. The compound valve assembly is adapted to block the inlet port upon completion of the delivery of liquid carbon to the system when the system has an initial low pressure. The carbon dioxide gas may then be drawn from the gas cylinder for use in use in carbonated beverages and other applications such as agricultural and medical uses.

The invention relates to an automatic cylinder changeover device (1), comprising two gas inlets for mounting gas cylinder banks, namely the left gas inlet and the right gas inlet, a gas outlet through which gas may be discharged and a valve suitable for connecting said left gas inlet or said right gas inlet with the gas outlet and configured for automatically reversible switching between these two connections, characterized in that the device (1) comprises an indicator, suitable for being manually set in one of two distinct positions, one of said positions indicating the left gas inlet and the other of said positions indicating the right gas inlet and comprises means for detecting the position of the indicator, including at least one sensor (5), preferably a pair of sensors (5). The invention also covers a method for monitoring a gas installation equipped with such automatic cylinder changeover device.

A control method comprises: receiving from a first vehicle, first information including a first required amount of the energy source; receiving from a second vehicle, second information including a second required amount of the energy source; and determining, when a total sum of required amounts of the energy source received from two or more vehicles including the first vehicle and the second vehicle is larger than a remaining amount in a storage reservoir, i) a first reserved supply amount of the energy source for the first vehicle, wherein the first reserved supply amount is smaller than the first required amount, and ii) a second reserved supply amount of the energy source for the second vehicle. The second reserved supply amount is determined within a range where a total sum of the first reserved supply amount and the second reserved supply amount does not exceed the remaining amount.

The invention related to a system for control of a hydrogen refueling station. The control of the hydrogen refueling station is optimized according to a high frequency tank profile in a time period between time A and time B. The high frequency tank profile includes selecting a first of the plurality of vessels as supply to the compressor during at least part of the refueling of the vehicle tank, the selection is based on pressure of hydrogen gas in one or more vessels of the supply storage. The control of the hydrogen refueling station is furthermore optimized according to a low frequency tank profile in a time period between time C and time D. The low frequency tank profile includes preparing one or more hydrogen refueling station components to enable a plurality of vehicle tank refuelings in the subsequent time period between time A and time B.

A system for transferring cryogenic fluid from a dispensing tank to a receiving tank is disclosed. The dispensing tank stores a supply of cryogenic liquid with a dispensing tank headspace above the liquid. A compressor has an inlet connected to the headspace of a receiving tank and an outlet connected to the headspace of the dispensing tank. A liquid transfer line is in fluid communication with the liquid side of the dispensing tank and the receiving tank. Cryogenic liquid is transferred from the dispensing tank to the receiving tank when the compressor is activated so as to transfer vapor from the headspace of the receiving tank to the headspace of the dispensing tank to create a pressure differential between the dispensing and receiving tanks.

A system and method for maintaining overpressure in a logging unit or other pressurized space through interruptions is disclosed. A backup air supply comprising tanks mounted to a frame is operatively connected to the ambient environment of the logging unit through a valve assembly which also connects a conventional pressure setup (e.g., pumps and filters from the external environment). The valve assembly comprises two auto valves, a shuttle valve, and a pressure sensor that allow the logging unit to switch from the conventional external air supply to the tanks when the pressure detected from the conventional air supply falls below a predetermined level. The valve assembly is independently housed and may be mounted or detached from the frame housing the backup tanks.

A dispenser apparatus that includes a first cascade stage having a first connector configured to connect to and disconnect from a first gas storage vessel, and a first conduit connected to the first connector and having a first valve and a first pressure measuring device, and a second cascade stage having a second connector configured to connect to and disconnect from a second gas storage vessel, and a second conduit connected to the second connector and having a second valve and a second pressure measuring device. A common flow path is fluidly connected to the conduits, and has a dispensing nozzle to connect to a vehicle during refueling. A controller is provided to control the first and/or second valve(s) to perform refueling using gas stored in at least one of the first and second gas storage vessels based on pressure measurements of the first and/or second pressure measuring device(s).

A cryogenic liquid switching system including an electronic control mechanism; a solenoid valve communicatively connected to the electronic control mechanism via an interface cable; a gas input control connected to the solenoid valve; and a pair of pneumatic valve actuators connected to the gas input control via separate isolation tubing components The system also including a pair of valve actuator pins, one each connected to a respective one of the pair of pneumatic valve actuators; a pair of pneumatic valves, one each connected to a respective one of the pair of valve actuator pins; and a cryogenic liquid input in fluid communication with at least a portion of each of the pair of pneumatic valves. The system further including a first cryogenic liquid output in fluid communication with a first of the pair of pneumatic valves; a second cryogenic liquid output in fluid communication with a second of the pair of pneumatic valves; and a temperature probe positioned adjacent to an exit of the cryogenic liquid input to measure the temperature of an incoming cryogenic liquid and send a signal to the electronic control mechanism to open and close the pneumatic valves based at least in part on the temperature of the incoming cryogenic liquid.