A compressed natural gas storage and dispensing system having descending pressure bulk storage banks in fluid communication with a supply source for CNG and high pressure storage banks in fluid communication with the descending pressure bulk storage bank, both banks being in fluid communication with fuel dispensers, wherein the delivery pressure of the CNG during simultaneous refueling of CNG powered vehicles is equalized.

A system for filling an LPG vehicle with LPG using an auxiliary bombe is provided. The system may be configured for easily filling a main bombe with LPG even in the hot season (summertime) or the like during which the outside temperature rapidly rises, by using an auxiliary bombe in addition to using the main bombe. The system may also be capable of always smoothly refilling the main bombe with LPG by moving a portion of the LPG in the main bombe to the auxiliary bombe, when the pressure in the main bombe is higher than the LPG filling pressure of a filling gun in the hot season during which the outside temperature rapidly rises, so that the pressure in the main bombe becomes lower than the filling pressure.

A hydrogen gas storage unit includes at least two hydrogen gas storage chambers. The hydrogen gas storage unit comprises a cylindrical container having an end anvil at each end of the cylindrical container. The at least two hydrogen gas storage chambers are separated by an intermediate anvil and at least one spacer disk. The intermediate anvil has a channel that permits hydrogen gas to flow between the two hydrogen gas storage chambers. The spacer disk extends radially outward from the intermediate anvil and secures a diaphragm in position within at least one of the hydrogen gas storage chambers. A metal alloy that can store hydrogen gas is located between the outer surface of the diaphragm and the inner surface of the cylindrical container.

A hydraulic compressed air energy storage system includes air and liquid tanks, each of which includes interdependent volumes of liquid and air. Each tank includes dedicated passages through which incoming air may be fed, forcing outflow of liquid, or incoming liquid may be fed, forcing outflow of air. Compressed air tanks are connected to a first group of the air and liquid tanks. The system further includes a pump and a liquid turbine, the liquid turbine being electrically connected to a generator for generating electric power. During charging of the system, liquid is pumped through the first group of air and liquid tanks, and air is expelled from the first group of air and liquid tanks and compressed in the compressed air tanks. During discharging of the system, compressed air is released from the compressed air tanks, and said compressed air pumps liquid through the liquid turbine, thereby generating electricity.

This invention relates to a novel method and system for dispensing CO2 vapor without over pressurization from a system having multiple containers. The system includes one or more liquid containers and one or more vapor containers. The system is designed to operate in a specific manner whereby a restricted amount of CO2 liquid is permitted into the vapor container through a restrictive pathway that is created and maintained by a shuttle valve during the filling operation so that equalization of container pressures is achieved, thereby allowing shuttle valve to reseat when filling has stopped. During use, a pressure differential device is designed to specifically isolate the vapor container from the liquid container so as to preferentially deplete liquid CO2 from the vapor container and avoid over pressurization of the system until the vapor container becomes liquid dry. The system can be operated so that at least 50% of the CO2 vapor product is dispensed from the vapor container.

A type IV conformable pressure vessel assembly is provided comprising a plurality of elongated folded tanks and an on-tank-valve (OTV) manifold assembly configured to pass fluid into and out of an interior of the plurality of elongated folded tanks through a plurality of first and second filling couplers directly connected to respective first and second ends of the plurality of elongated folded tanks. Each of the plurality of elongated folded tanks have at least two chambers for the storage of fluid. The manifold valve assembly receives fluid from an external source, selectively provides the external fluid to one or more of the plurality of first and second filling couplers.

This fluid storage and transfer system includes a first storage tank and second storage tank configured to contain cryogenic liquids. The first storage tank has a heat exchanger. A second cryogenic liquid from the second storage tank subcools a first cryogenic liquid in the first storage tank and pressurizes the first storage tank. The first storage tank is then further pressurized using the heat exchanger. The first cryogenic fluid is transferred from the first storage tank to an end point. In an example, the first cryogenic fluid is liquefied natural gas and the second cryogenic fluid is liquid nitrogen.

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.

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 cryogenic fluid purification device comprising: a first container defining an interior region; a second container defining an interior region in fluid communication with the interior region of the first container; and a cryogenic fluid in contact with an exterior of the second container.