A method for constructing a triple shell tank including an inner tank, an intermediate tank, and an outer tank each having a roof and a side plate includes the following procedure. An intermediate tank roof is temporarily fixed onto an inner tank roof, and further an outer tank roof is temporarily fixed onto the intermediate tank roof to form a connected roof body. An outer tank side plate having a predetermined height is installed around the connected roof body. A sealing process is performed between an outer peripheral edge of the outer tank roof and an inner face of the outer tank side plate to form a sealed space, and air is supplied to the sealed space to air-raise the connected roof body. The outer tank roof and the outer tank side plate are fixed. An inner tank side plate and an intermediate tank side plate are installed and the temporary fixing of the connected roof body is released to fix the inner tank roof and the inner tank side plate and fix the intermediate tank roof and the intermediate tank side plate.

A floating structure including a sealed and thermally insulated tank. An upper bearing wall bears a turret-like cargo tank dome intended for the passage of cargo handling equipment. The turret-like cargo tank dome with an internal fluidtight wall forming a sheath engaged through the opening in the upper bearing wall and connected in fluidtight manner to the primary sealing membrane of the upper tank wall all around the sheath. Respective primary and secondary venting devices allow gas to be vented respectively from the primary and secondary spaces of the turret-like cargo tank dome. A gas reservoir containing a tracer gas that is non-condensable or that has a condensation temperature below the low temperature of the liquefied gas contained in the tank is connected via a control valve to one of the venting devices that are the primary venting device and the secondary venting device.

This liquid hydrogen storage tank includes a tank body, a dike, a pump, and a housing chamber. The tank body includes an inner tank that forms a storage space for storing liquid hydrogen therein, and an outer tank that is formed by interposing a thermal insulation layer between the outer tank and the inner tank. The dike includes an outer peripheral surface and an inner peripheral surface that is in contact with the side plate of the outer tank. The dike is formed upwardly so as to surround the outer periphery of the tank body. The pump discharges liquid hydrogen inside the inner tank through the side plate of the inner tank to the outside. The housing chamber is disposed between the outer peripheral surface of the dike and the storage space, and houses the pump.

A method for constructing a triple shell tank including an inner tank, an intermediate tank, and an outer tank each having a roof and a side plate. According to the construction method, an intermediate tank roof is temporarily fixed onto an inner tank roof to form a connected roof body, a guide side plate having a predetermined height is installed around the connected roof body, a sealing process is performed between an outer peripheral edge of the connected roof body and an inner face of the guide side plate to form a sealed space, air is supplied to the sealed space to air-raise the connected roof body, at least a part of an outer tank roof is formed on the intermediate tank roof of the air-raised connected roof body, and an outer tank side plate is installed around the guide side plate.

The invention relates to an insulated chamber comprising at least one element that may operate at sub-ambient temperature, the space around the element(s) being filled with solid insulation and means for injecting a gas containing at least 95 mol-% nitrogen into the insulation, at least some of the gas-injection means opening at a position vertically above at least one element to insulate.

A sealed and insulating tank for storing and/or transporting a liquefied gas has a sealed and self-supporting internal reservoir with an interior surface for contacting the liquefied gas and an outer surface with an insulating barrier covering the outer surface of the internal reservoir. The insulating barrier is fixed to the internal reservoir. An outer sealed membrane covers an outer surface of the insulating barrier, and the outer sealed membrane has a metal sheet provided with bellows or corrugations. The outer sealed membrane is fixed to the insulating barrier or the internal reservoir. An intermediate space between the internal reservoir and the outer sealed membrane contains a gaseous phase under depression in order to press the outer sealed membrane against the outer surface of the insulating barrier.

A multiple-shell tank includes: an inner tank that stores a liquefied gas; an intermediate tank that covers the inner tank and forms a first heat insulating space between the intermediate tank and the inner tank; an outer tank that covers the intermediate tank and forms a second heat insulating space between the outer tank and the intermediate tank; and a communication part enabling an external space that is a space outside the multiple-shell tank and the first heat insulating space to communicate with each other.

The invention relates to a wall (11) for a leaktight and thermally insulating vessel for storing a liquefied gas, said wall (11) comprising, in succession in a thickness direction from the outside to the inside of the vessel, a leaktight outer barrier (13), a thermally insulating barrier (14) and a leaktight inner barrier (15), the thermally insulating barrier (14) having a gas phase at an absolute pressure of less than 1 Pa and comprising:a radiative multilayer insulation cover (47) which extends at right angles to the thickness direction, said radiative multilayer insulation cover (47) comprising a stack of a plurality of sheets which are made of metal or polymer material coated with a metal and which are separated from one another by a textile layer; and-insulating elements (51) which have an open-celled porous structure and are arranged between the radiative multilayer insulation cover (47) and the leaktight outer barrier (13).

A heat exchanger comprises an inlet, an outlet, a heat exchanging channel, and an opening. The heat exchanging channel surrounds a cavity. The opening provides access to the cavity. The inlet is coupled to one end of the heat exchanging channel and the outlet is coupled to another end of the heat exchanging channel. The heat exchanging channel is isolated from the cavity. No access or passage is present between the heat exchanging channel and the cavity. During operation, heat exchanging fluid flows through the heat exchanging channel thereby cooling fluid within the cavity. The heat exchanging fluid never contacts the fluid within the cavity. In various embodiments, the heat exchanging channel has a single or stacked layer when viewed along a cross section. The heat exchanging channel has a spherical, cylindrical, or rectangular shape. In one embodiment, an insulative layer is disposed between layers of the heat exchanging channel.

A sealed and insulating tank for storing and/or transporting a liquefied gas has a sealed and self-supporting internal reservoir with an interior surface for contacting the liquefied gas and an outer surface with an insulating barrier covering the outer surface of the internal reservoir. The insulating barrier is fixed to the internal reservoir. An outer sealed membrane covers an outer surface of the insulating barrier, and the outer sealed membrane has a metal sheet provided with bellows or corrugations. The outer sealed membrane is fixed to the insulating barrier or the internal reservoir. An intermediate space between the internal reservoir and the outer sealed membrane contains a gaseous phase under depression in order to press the outer sealed membrane against the outer surface of the insulating barrier.