Fluid storage tank, comprising at least one layer, wherein the at least one layer encloses at least one chamber, further comprising a valve, the valve connecting an interior of the at least one chamber with an exterior of the at least one chamber, wherein the fluid storage tank is made at least partially by means of 3D-printing.

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 method of recovering energy produced by the change of phase of dry ice using a device having an enclosure (2) containing dry ice at an infra-atmospheric pressure and at a solidification temperature corresponding to the infra-atmospheric pressure; and a primary energy recovery circuit (3), in which a heat transfer fluid circulates, passing through the enclosure. The method involves passage of the heat transfer fluid into the primary circuit (3), this step causing the heating of the dry ice and its change of phase into CO2 and the cooling of the heat transfer fluid; extraction of the CO2 contained in the enclosure (2); and substantially continuous lowering of the pressure of the enclosure (2) to an infra-atmospheric pressure.

A hydrogen storage device includes a storage container having an accommodation space in an interior thereof, a first metal hydride material provided in the interior of the storage container and that stores hydrogen, and a second metal hydride material provided in the interior of the storage container and that stores the hydrogen at a pressure that is different from that of the first metal hydride material. An advantageous effect of restraining an excessive rise of a pressure of the storage container and enhancing safety and reliability may be obtained.

The present invention discloses a solid-state source gasification device, comprising a housing and one or more trays, a top cover is provided on the top of the housing. A gas inlet and a gas outlet are provided on the top cover. The trays are vertically stacked in the housing. A carrier gas pipe is provided in the housing. An upper end of the carrier gas pipe is connected to the gas inlet. The carrier gas pipe penetrates through the trays, and extends into the bottommost-layer tray. One or more carrier gas outlets are formed in the carrier gas pipe. The carrier gas outlets are formed in a space of the bottommost-layer tray or formed in a space of the bottommost-layer tray and the rest trays. Except for the bottommost-layer tray, the rest trays are each provided with one or more gas conduits. The solid-state source gasification device of the present invention adopts a parallel gas transmission channel, whereby the carrier gas, after entering the carrier gas pipe from the gas inlet, can enter into each tray separately, and can be transmitted horizontally in each tray along the surface of the solid-state source material for a longer distance before reaching gas conduit, and thus a large amount of gasification gas can be carried in the carrier gas to enhance the overall gasification efficiency of the solid-state source gasification device.