According to the present invention, a ship including a gas re-vaporizing system including a re-vaporizing apparatus, which re-vaporizes liquefied gas through seawater supplied by a seawater supply apparatus, supplies a fluid inside a seawater storage tank, which maintains pressure of seawater flowing in a circulation connection line, to the circulation connection line, in order to implement the switch of an operation mode of the seawater supply apparatus from an open loop mode to a close loop mode non-stop.

A cryogen storage vessel at an installation is filled with liquid cryogen from a liquid cryogen storage tank that has a pressure lower than that of the vessel. After headspaces of the vessel and tank are placed in fluid communication with another via a gas transfer vessel and are pressure-balanced, a pump in a liquid transfer line connected between the tank and the vessel is operated to transfer amounts of liquid cryogen from the tank to the vessel via the liquid transfer line and pump as amounts of gaseous cryogen are transferred, through displacement by the pumped cryogenic liquid, from the vessel to the tank.

A fuel transfer station may provide for the refilling of fuel canisters providing fuel to combustion powered equipment. The fuel transfer station may include a base, a frame coupled to the base, a first connection port and a second connection port provided in the base, and fluid flow lines connecting the first connection port and the second connection port. A supply tank may be supported by the frame and detachably connected to the first connection port. A fuel canister to be refilled may be detachably connected to the second connection port. Fuel contained in the supply tank may be selectively supplied to the fuel canister through the fluid flow lines in response to a pressure gradient drawing the fuel into the fuel canister.

Apparatus and methods for vaporizing LNG while producing sufficient volume of compressed natural gas at sufficient pressure to meet the needs of internal combustion engines, gas turbines, or other high consumption devices operating on natural gas or on a mixture of diesel and natural gas. The LNG vaporizer of the present invention incorporates a reciprocating pump to provide vaporized LNG to an output at rates and pressures as required by the particular application. The heat rejected into the engine coolant and the exhaust stream from an artificially loaded internal combustion engine, as well as the hydraulic heat resulting from artificially loading the engine, is transferred to the LNG as the LNG passes through a heat exchanger. Exhaust heat is transferred to the engine coolant after the coolant passes through the heat exchanger.

Gas dispensing control systems that use a gas expansion chamber with a plunger in fluid communication with both a vacuum pump and a nitrogen supply with a controller that calculates and dispenses standard volumes of gas based, at least in part, on local environmental conditions. The dispensed gas can be hyperpolarized .sup.129Xe for MRI imaging.

A cryogenic fluid transfer device comprising a first tank, a second tank, and a fluid transfer circuit, wherein the first tank comprises a cryogenic fluid distribution tank configured to store a cryogenic fluid in a liquid phase in a lower part thereof and in a gaseous phase in an upper part thereof, wherein the second tank comprises a cryogenic receiving tank configured to house the cryogenic fluid in liquid phase in a lower part thereof and in gaseous phase in an upper part thereof, wherein the fluid transfer circuit is configured to connect the first and second tanks, the fluid transfer circuit comprising a first pipe connecting the upper parts of the first and second tanks and comprising at least one valve, and a second pipe connecting the lower part of the first tank to the second tank that comprises a pump that has an inlet connected to the first tank and an outlet connected to the second tank, wherein: the pump and the at least one valve of the first line are configured so as to ensure a fluidic connection of the upper parts of the first and second tanks by opening the at least one valve during a transfer of the cryogenic fluid in liquid phase from the first tank to the second tank with the pump.

A cryogenic fluid pump includes a plurality of pumping elements, each of the plurality of pumping elements having an actuator portion that is associated with and configured to selectively activate one end of a pushrod in response to a command by an electronic controller, an activation portion associated with an opposite end of the pushrod, and a pumping portion associated with the activation portion. For each of the plurality of pumping elements, the pumping portion is activated for pumping a fluid by the activation portion, which activation portion is activated by the actuator portion. The electronic controller is configured to selectively activate each of the plurality of pumping elements such that a flow of fluid from the cryogenic fluid pump results from continuous activations of the plurality of pumping elements at selected dwell times between activations of successive pumping elements.

An integrally-transportable purge container capable of preventing entry of air when a submersible pump is carried into a pump column, and capable of warming the submersible pump when it is removed from the pump column to prevent components of the air from being liquefied is provided. The integrally-transportable purge container includes: a container body having an interior space for accommodating a submersible pump therein; an upper lid configured to cover an upper opening of the container body; a lower lid configured to cover a lower opening of the container body; and a purge-gas inlet port and a purge-gas outlet port communicating with the interior space of the container body. The integrally-transportable purge container is detachably coupled to an upper portion of a pump column in which the submersible pump is to be installed. The integrally-transportable purge container is configured to be transportable together with the submersible pump.

A purge container (1) has a container body (21) having an interior space (20) for accommodating a submersible pump (2), an upper lid (23) configured to cover an upper opening of the container body (21), a lower lid (24) configured to cover a lower opening of the container body (21), and a purge-gas inlet port (27) and a purge-gas outlet port (28) communicating with the interior space (20) of the container main body (21). The container body (21) is secured to an upper portion of a pump column (3) in which the submersible pump (2) is to be installed.

A cryogenic pump for pumping liquefied natural gas (LNG) from a cryogenic tank storing LNG includes a drive assembly and a pump assembly disposed along a pump axis. The drive assembly includes a spool housing having a plurality of spool valves arranged around the pump axis, a tappet housing having a plurality of tappet bores with slidable tappets arranged around the pump axis, and spring housing including a plurality of movably disposed pushrods urged upward by a plurality of associated pushrod springs. Hydraulic fluid received by a hydraulic fluid inlet in the drive assembly is directed by the spool valves to the tappet bores to move the tappets downward against the pushrods. To collect the hydraulic fluid, the lowermost spring housing also includes a collection cavity formed therein that can return the hydraulic fluid to a hydraulic fluid outlet.