摘要:
An inventory management method is also provided. This method includes removing and replacing the gas product from a first salt cavern as supply and demand dictate, analyzing the impurities in the gas product that is removed, predicting the duration until a maximum acceptable impurity limit is present, removing all the working gas from the first salt cavern when the maximum acceptable impurity limit is reached, then replacing the working gas in the first salt cavern, while concurrently, removing and replacing the gas product from a second salt cavern as supply and demand dictate, analyzing the impurities in the gas product that is removed, predicting the duration until a maximum acceptable impurity limit is present, removing all the working gas from the second salt cavern when the maximum acceptable impurity limit is reached, then replacing the working gas in the second salt cavern, while concurrently repeating steps a)-g).
摘要:
A hydrogen fueling system and method comprises a container, a first tank, second tank, and third tank disposed within the container, and a nozzle coupled to the second tank and the third tank. One or more computer-readable storage media storing instructions executable by one or more processors may control flow of liquid hydrogen and hydrogen gas in the system, adjust temperature of the tanks, control pressure in the tanks, and transfer hydrogen gas from the second tank, the third tank, or a combination thereof to one or more target vessels. The system may also comprise flow control assemblies and flow control valves to manage the transfer of liquid hydrogen and hydrogen gas in the system.
摘要:
In a process for regasifying low-temperature liquefied gas in which some of the low-temperature liquefied gas situated in a tank (1) is brought from the tank (1) into a metering reservoir (2), the metering reservoir (2) is separated from the tank (1), and a metered amount of the low-temperature liquefied gas is then fed to an evaporator (20), whereupon the vaporized amount of gas is charged into a high-pressure gas reservoir (24) or is fed into a pipe network, whereupon the evaporator (20) is separated from the metering reservoir (2), the pressure in the metering reservoir (2) is lowered and the metering reservoir (2) is again charged with liquefied gas from the tank (1), the pressure in the metering reservoir (2) is lowered in that the gas situated in the metering reservoir (2) is conducted through a heat exchanger (14) in which the gas is cooled and/or partially condensed, wherein the condensate possibly formed in the heat exchanger and the cooled gas at the remaining gas pressure are guided into the tank (1), and the cooled gas is condensed in the part of the tank (1) containing the liquefied gas.
摘要:
A method of treating a gas. The method comprises one or more compression step(s) in which a pressurised drive gas actuates a piston which compresses the gas, a cooling step in which expanded drive gas cools the compressed gas, and a filling step in which the cooled compressed gas, or a condensate thereof, is filled on a receiving gas cylinder. A method of recovering a gas, in which the gas is treated with the aforementioned method. A gas compression system (1). Use of an expanded drive gas from a gas compression device. A hitherto unidentified cooling capacity of expanded drive gas from a gas booster is utilized to match downstream cooling requirements of the gas compressed by the gas booster.
摘要:
The invention is directed to a method for calculating the remaining usage time of a gas cylinder equipped with a pressure reducer, the method comprising the following steps: (a) measuring the pressure of the gas in the cylinder; (b) calculating the variation of pressure of the gas in the cylinder over time while gas is outputted; (c) calculating a remaining usage time Tr based on the measured pressure in the cylinder and the calculated variation of pressure. Step (c) takes into account characteristics of the pressure reducer relative to variations of its nominal flow rate along the decrease of its inlet pressure while emptying the cylinder.
摘要:
In order to provide improved efficiency, e.g. in terms of how to operate and maintain a liquid natural gas (LNG) transfer system, while also improving the environmental friendliness of the transfer operation, there is disclosed a method and system of transferring liquid natural gas from a first container 104 to a second container 106 via a pump station 108. The first container 104 is positioned close to the pump station 108 by a truck 110, and the second container 106 is positioned close to the pump station 108 by a ship 112. Repeated transfer of LNG is provided using first and second dry couplings 304, 308 and, after transfer is complete, disconnecting the second dry coupling 308 from the second container and providing a flow of liquid natural gas back into the first container utilising an overpressure in the insulated pipes or hoses 202, 208 and in pipes of the pump station relatively to the pressure in the first container and by replacing the first container 104 with a filled first container when the first container is empty.
摘要:
A method and apparatus for compressing gases and supplying fuel to a gaseous fuel consuming device, such as a gaseous fueled vehicle or the like. One embodiment includes a gas compressor for compressing the gaseous fuel to an array of tanks having predetermined initial set points which are increasing for tanks in the array. One embodiment provides a selecting valve having first and second families of ports wherein the valve can be operated to select a plurality of ports from the first family to be fluidly connected with a plurality of ports with the second family, and such fluid connections can be changed by operation of the valve.
摘要:
High and low pressure pumping systems for cryogenic or liquefied gases comprise at least one cryogenic tank (1) in which the liquefied cryogenic gas is stored at low pressure and at least one vaporizer (2) which is connected to the gas offtake region located downstream of the system. The systems comprise: at least one insulated tank (S; S1) which is interposed between a cryogenic tank (1) and a vaporizer (2); valves (V1, V2, V; V1, V3, V13) for connecting the tank (S; S1) to the tank (1) and valves (V3, V4; V2, V4) for connecting the tank (S; S1) to the vaporizer (2).
摘要:
A method for dispensing compressed gas from two or more compressed gas storage volumes to receiving vessel such as vehicle fuel tanks. Control instructions are provided to cycle the compressed gas storage volumes through pressure cycles in a rolling rotating cascading manner such that each of the compressed gas storage volumes cycle from an upper pressure limit to a lower pressure limit.