摘要:
Disclosed herein are a pump tower installation structure of a liquefied natural gas (LNG) storage tank and a manufacturing method thereof. The pump tower installation structure of the LNG storage tank includes an adaptor disposed at a predetermined area of an opening portion formed at an inner hull disposed on an upper side of the LNG storage tank, and a cover having through-holes corresponding to pipes of the pump tower installed at the storage tank, and disposed at a remaining area of the opening portion to be connected with the adaptor.
摘要:
Methods and systems for modular fuel storage and transportation are provided. In an embodiment, a fuel storage system includes one or more fuel containers each supported by a fuel container support assembly. The fuel storage system may be mounted to a transportation device such as a vehicle or used in a stand-alone fashion. Each support assembly may include a plurality of detachable end support members such as end support members configured to support the end portions of the fuel container and side support members configured to support the body portion of the fuel container. Some of the end support members may include neck grooves such that when the end support members are coupled, the neck grooves form an enclosure around the neck portion of the fuel container. In an embodiment, the support assembly is configured to facilitate release of excess pressure in the fuel container.
摘要:
An LNG storage tank and a method of treating boil-off gas using the same are disclosed. The LNG storage tank and the method of treating boil-off gas enable the pressure of the LNG storage tank to be maintained in a stable state without consuming boil-off gas generated in the LNG tank as propulsion fuel or without re-liquefying the boil-off gas. The storage tank comprises a thermal insulation wall, and has strengthened structure to permit a pressure increase resulting from heat influx to the LNG tank and boil-off gas generation. The method comprises permitting a pressure increase by the boil-off gas generation and LNG cargo temperature increase in the storage tank without treating the generated boil-off gas in the storage tank, so that the boil-off gas is accumulated without extracting or loss in the storage tank.
摘要:
Provided a LNG ship that is manufactured in a short construction period by assembling a LNG tank on land and mounting the LNG tank in a hold of the ship. A cold insulator and a membrane are affixed on an inner side of a prismatic tank to fabricate a LNG tank, which is mounted in a hold having a double hull structure. In order to prevent the prismatic tank from deforming at the time of the mounting, strength members are welded to an outer surface of the prismatic tank before a thermal insulation work for the purpose of sufficient reinforcement. After the tank is mounted in the hold, the strength members of the prismatic tank are coupled to the inner hull of the ship to integrate the LNG tank and the hull, so that the weight of a liquid cargo is supported by the prismatic tank and the hull together.
摘要:
Anchor and corner structures of an LNG storage tank are disclosed. The LNG storage tank (10) comprise a heat insulating wall on an inner surface (12, 14) of the storage tank, a sealing wall (51, 52) contacting LNG on the heat insulating wall, and a structure to support the sealing wall. The structure comprises an anchor structure (100), which comprises an anchor member (110, 130) between the inner surface (12, 14) of the storage tank and the sealing wall to secure the sealing wall to the inner surface, and a heat-insulating material (203) around the anchor member. The anchor member (110, 130) is coupled at several portions to the inner surface. The structure provides a simple configuration to the heat insulating wall and the sealing wall, and a simple connection therebetween, enabling convenient construction thereof while increasing sealing reliability. The structure simplifies an assembled structure and a manufacturing process, reducing a construction time of the tank while efficiently relieving stress on the tank.
摘要:
A transport container for liquefied gas has a double-wall structure, having an inner shell (101) for accommodating liquefied gas (1) of a lower boiling point than air condensation temperature, and an outer shell (102) that encloses the inner shell, an area (103) between the inner and outer shells being vacuum-insulated. The transport container has a submerged pump (104) for discharging liquefied gas and a manhole (140) for maintenance and inspection of the submerged pump, and the manhole has an inner shell manhole (110) communicating with the inner shell, an outer shell manhole (120) enclosing the outer side of the inner shell manhole and being attached to the outer shell, and a shielding member (130) for separating the area between the inner and outer shells and outside air and suppressing heat input from the outer shell manhole to the inner shell manhole, the shielding member being placed between an inner shell manhole trunk (111) and an outer shell manhole trunk (121).
摘要:
A method for filling a fuel tank with liquefied gas includes liquefied gas being brought into the tank so that gas in introduced to a lower section of the tank below the surface of the liquefied gas in the tank, and during a first phase of the filling procedure while gas is introduced to a lower section of the tank the pressure of the tank is maintained below a predetermined set pressure by spraying of liquefied gas into a gas space in the upper section of the tank above the surface of the liquefied gas in the tank. At a predetermined state of the filling procedure a second phase of the procedure is initiated during which the spraying liquefied gas into a gas space in the upper section of the tank is decreased and the second phase is practised until a predetermined filling stage of the tank is reached.
摘要:
A method for filling a tank (1) with liquefied gas, in particular a tank with cryogenic liquid, from a liquefied gas container (2), in particular a cryogenic liquid container (2), which container (2) is in fluid communication with the tank (1) via a filling pipe (3), wherein the method uses a pressure differential generation member (4) for transferring liquid from the container (2) to the tank (1) at a predetermined pressure, characterized in that, at or following the switching on time (M) of the pressure differential generation member (4), the method comprises a step of determining the pressure (PT4) in the tank (1) via a measurement of a first pressure in the filling pipe (3), and, following the determination of the pressure (PT4) in the tank, a step of limiting the first instantaneous pressure (PT3) to a level below a maximum pressure threshold (PT3sup), said maximum pressure threshold being defined on the basis of the determined value of the pressure (PT4) in the tank (1) and exceeding said determined value of the pressure (PT4) in the tank by two to twenty bars and preferably by two to nine bars.
摘要:
A method for filling a tank (1) with liquefied gas, in particular a tank with cryogenic liquid, from a liquefied gas container (2), in particular a cryogenic liquid container (2), wherein, following a predetermined time after filling has started, the method comprises the step of comparing the first instantaneous pressure (PT3) in the filling pipe (3) or an average of said first instantaneous pressure (PT3) with a predetermined maximum threshold (Pmax), and, when said first instantaneous pressure (PT3) in the filling pipe (3) or the average of said first instantaneous pressure (PT3), respectively, exceeds the maximum threshold (Pmax), the step of interrupting (AR) the filling (R).
摘要:
A method and system delivers a cryogenically stored fuel in a gaseous state into the air intake system of a gaseous fuelled internal combustion engine. The method involves measuring the pressure in the vapor space of the cryogenic storage vessel, comparing the measured pressure to a required fuel supply pressure and supplying fuel in gaseous state directly from the vapor space of the cryogenic storage vessel to the fuel delivery line that supplies fuel to the engine, when the pressure measured in the vapor space of the cryogenic storage vessel is equal to or higher than the required fuel supply pressure. The method further involves activating a cryogenic pump to deliver fuel to the internal combustion engine from the liquid space of the cryogenic storage vessel when the measured pressure in the vapor space is lower than the required fuel supply pressure.