A cold energy recovery apparatus for a self-powered data centre is disclosed. The apparatus comprises a fluid storage tank having at least a pair of inlet and outlet, the inlet configured to receive a coolant; and a heat exchanger arranged in the tank, the heat exchanger having a pair of inlet and outlet, the inlet configured to receive liquefied natural gas. The apparatus is operable to permit the coolant to flow from the inlet to the outlet of the tank causing the coolant to be in fluid contact with the heat exchanger, in which the coolant is progressively cooled to a lower temperature by heat transfer to the liquefied natural gas via fluid contact with the heat exchanger. The liquefied natural gas is vaporized into natural gas due to the heat transfer and is directed out from the outlet of the heat exchanger.

An offshore floating facility includes a hull and an intermediate fluid type vaporizer. The intermediate fluid type vaporizer includes: a pump which pumps sea water; an intermediate fluid evaporator which evaporates an intermediate fluid by the sea water pumped up by the pump; an LNG evaporator which vaporizes an LNG by the intermediate fluid evaporated in the intermediate fluid evaporator; a gas pipe which guides the intermediate fluid evaporated in the intermediate fluid evaporator to the LNG evaporator; and a liquid pipe which guides the intermediate fluid condensed in the LNG evaporator to the intermediate fluid evaporator. The LNG evaporator is disposed on a deck of the hull, the intermediate fluid evaporator is disposed below the deck, and the intermediate fluid is allowed to naturally circulate between the intermediate fluid evaporator and the LNG evaporator.

An apparatus, system and method for capture, utilization and sendout of latent heat in boil off gas (BOG) onboard a cryogenic storage vessel is described. A liquefied gas vessel comprises a cryogenic cargo tank onboard a liquefied gas vessel, the cargo tank comprising a liquefied gas and a BOG, a latent heat exchanger fluidly coupled to a stream of the liquefied gas and a stream of the BOG, wherein the latent heat exchanger transfers a heat between the BOG stream and the liquefied gas stream to produce a condensed BOG, means for combining the condensed BOG and the liquefied gas stream to obtain a combined stream, the means for combining the condensed BOG and the liquefied gas stream fluidly coupled to the latent heat exchanger, and a liquefied gas regasifier onboard the vessel and fluidly coupled to the combined stream, wherein the liquefied gas regasifier regasifies the combined stream.

An apparatus, system and method for capture, utilization and sendout of latent heat in boil off gas (BOG) onboard a cryogenic storage vessel is described. A liquefied gas vessel comprises a cryogenic cargo tank onboard a liquefied gas vessel, the cargo tank comprising a liquefied gas and a BOG, a latent heat exchanger fluidly coupled to a stream of the liquefied gas and a stream of the BOG, wherein the latent heat exchanger transfers a heat between the BOG stream and the liquefied gas stream to produce a condensed BOG, means for combining the condensed BOG and the liquefied gas stream to obtain a combined stream, the means for combining the condensed BOG and the liquefied gas stream fluidly coupled to the latent heat exchanger, and a liquefied gas regasifier onboard the vessel and fluidly coupled to the combined stream, wherein the liquefied gas regasifier regasifies the combined stream.

A methane transportation system is provided. The system may include a methane source configured to dispense methane at a first location, and an underwater vehicle. The underwater vehicle may include a propulsion system configured to transport the underwater vehicle underwater from the first location to a second location and a vessel defining a storage chamber configured to receive water and the methane from the methane source. The storage chamber of the vessel may have a pressure exceeding one atmosphere and a temperature during transport from the first location to the second location sufficient to form methane clathrate in the storage chamber. The system may further include a methane receiver configured to receive the methane released from the storage chamber at the second location. Related methods are also provided.

A system for storing compressed gas that includes a surface structure, a gas storage assembly and a thermal storage assembly. The surface structure includes a compressor and expander assembly associated therewith. The gas storage assembly includes at least one gas receiver and is in fluid communication with the compressor and expander assembly. In use, the gas storage assembly is disposed in a body of water. The gas storage assembly is configured to move within the body of water from a first level to a second level when compressed gas is added to the gas storage assembly. The second level is deeper than the first level. The thermal storage assembly includes a tank containing water therein. The thermal storage assembly is in thermal communication with the compressor and expander assembly. The heat generated from the compression of the gas is transferred to the water in the tank in the thermal storage assembly.

A system supplies gas to a high-pressure gas-consuming apparatus and a low-pressure gas-consuming apparatus of a floating structure including a tank. The supply system includes: a first supply circuit, a second supply circuit, a return line, a first heat exchanger and a second heat exchanger. The return line includes a flow-regulating member. The supply system includes a device for managing the supply system which includes a control module to control the flow-regulating member based on the characteristics of the gas.

A gas supply system includes a first tank, a first path into which a first gas generated by vaporization of a first low-temperature liquefied gas flows, a gas boosting mechanism being disposed in the first path, a second path that is a path configured to extract the first low-temperature liquefied gas from the first tank, a pump and a vaporization mechanism being disposed in the second path and a reliquefaction path that is a path configured to liquefy at least part of the first gas extracted from an upstream side of the gas boosting mechanism in the first path and to cause the liquefied first gas to flow into an upstream side of the pump in the second path, a cooling heat exchanger configured to cool the first gas by a second low-temperature liquefied gas or a second gas being disposed in the reliquefaction path.

A methane transportation system is provided. The system may include a methane source configured to dispense methane at a first location, and an underwater vehicle. The underwater vehicle may include a propulsion system configured to transport the underwater vehicle underwater from the first location to a second location and a vessel defining a storage chamber configured to receive water and the methane from the methane source. The storage chamber of the vessel may have a pressure exceeding one atmosphere and a temperature during transport from the first location to the second location sufficient to form methane clathrate in the storage chamber. The system may further include a methane receiver configured to receive the methane released from the storage chamber at the second location. Related methods are also provided.

An apparatus, system and method for capture, utilization and sendout of latent heat in boil off gas (BOG) onboard a cryogenic storage vessel is described. A liquefied gas vessel comprises a cryogenic cargo tank onboard a liquefied gas vessel, the cargo tank comprising a liquefied gas and a BOG, a latent heat exchanger fluidly coupled to a stream of the liquefied gas and a stream of the BOG, wherein the latent heat exchanger transfers a heat between the BOG stream and the liquefied gas stream to produce a condensed BOG, means for combining the condensed BOG and the liquefied gas stream to obtain a combined stream, the means for combining the condensed BOG and the liquefied gas stream fluidly coupled to the latent heat exchanger, and a liquefied gas regasifier onboard the vessel and fluidly coupled to the combined stream, wherein the liquefied gas regasifier regasifies the combined stream.