The method of transferring compressed gas at from a first tank to a second tank without decompressing the compressed gas and then re-pressuring the compressed gas comprising filling the second tank with a fluid, connecting a first fluid connection on the first tank to a second fluid connection on the second tank with a first line with one or more first valves, connecting a first gas connection on the first tank to a second gas connection on the second tank with a second line with one or more second valves, opening the first valves and the second valves to allow the compressed gas to pressurize the fluid, and pumping the fluid in the second tank into the first tank, thereby causing the compressed gas in the first tank to be displaced into the second tank.

A fuel management module for use with a CNG fuel system for a vehicle includes a housing configured to be connected to the vehicle and a number of connections, receptacles, and controls associated with the module. A defueling receptacle may be positioned on the front panel of the housing, for defueling a fuel tank of the vehicle. A defueling control valve may be positioned on the front panel of the housing for controlling operation of the defueling receptacle, allowing for selective defueling. One or more high pressure connections may be accessible on the housing and configured for connection to one or more separate fuel tanks in a plug and play configuration. A plurality of filling connections may be accessible on the housing for filling the fuel tank(s). A low pressure fuel output connection may be positioned on the back panel of the housing to provide fuel output from the high pressure connections to the engine.

A method and apparatus fueling vehicle with gaseous fuel includes storage vessels, dispensing sub-stations and a controller. The storage tanks or vessels can be at different pressures. The plurality of dispensing sub-stations each include a dispensing hose and a control valve. Each dispensing sub-station is in controllable fluid communication with the storage vessels so that fluid can flow from the storage vessels through the dispensing sub-station to a vehicle tank. A dispensing hose, and a control valve of the dispensing sub-stations are in the fluid flow paths. The controller receives feedback indicative of a filling parameter from the dispensing sub-stations, and provides control signals to the control valves of the first and second dispensing sub-station to implement one or more desired fill schemes.

The method comprises: a first step of supplying the gas in the first tank body to the gas consuming device through the first gas supply pipe by bringing the first gas tank into the first state; a second step of bringing the first gas tank from the first state to the second state after the first step has been followed by a reduction in the amount of the gas in the first tank body to less than a predetermined reference amount; and a third step of bringing the first gas tank from the second state to the third state after the gas in the first gas supply pipe has been consumed by the gas consuming device and the pressure of the gas in the first gas supply pipe has been reduced to less than the predetermined reference pressure after the second step.

In the first step, the gas in the first tank body is supplied to a gas consuming device through a first gas supply pipe by bringing the first gas tank into the first state. In the second step, the first gas tank is brought from the first state to the second state after the gas amount in the first tank body is reduced to less than a predetermined reference a amount. In the step, the first gas tank is brought from the second state to the third state after the gas in the first gas supply pipe has been consumed by the gas consuming device and the pressure of the gas in the first gas supply pipe has been reduced to less than a predetermined reference pressure.

A fluid transfer apparatus may comprise a housing with first and second opposing openings and a plate extending across the housing. The plate has a first surface facing the first opening and a second surface facing the second opening, a first pin coupled to the first surface and extending from the first surface, a second pin coupled to the second surface and extending from the second surface, a channel that allows fluid to pass from the first opening to the second opening, a plurality of first inner ribs, each having a horizontally extending portion along the first surface, a first gasket interposed between the first surface and the first opening, wherein the first gasket comprises a first center gasket opening surrounding the first pin and the plurality of first inner ribs, and a second gasket interposed between the second surface and the second opening.

A bunkering vessel according to the present invention is for loading a liquefied gas to and unloading a liquefied gas from a liquefied gas storage tank of a target, and it includes a bunkering tank storing a liquefied gas; a manifold provided at a bunkering station of the bunkering vessel to flow in a liquefied gas to and flow out a liquefied gas from the bunkering vessel; a liquefied gas transfer line connecting the bunkering tank and the manifold to flow a liquefied gas; and a dry gas supply portion producing a dry gas, and the dry gas supply portion supplies a dry gas to the liquefied gas storage tank through the manifold before loading a liquefied gas to the liquefied gas storage tank to remove moisture inside the liquefied gas storage tank.