A vapor pressure regulation system includes a vessel including a vessel wall that defines an enclosure, and a temperature adjustment mechanism coupled to the vessel. A heat transfer between the temperature adjustment mechanism and the vessel is adjusted based on at least a vapor pressure within the vessel to facilitate regulating the vapor pressure within the vessel.

A system and a method with boil-off management for liquefied fuel storage are provided. The system includes a cryotank for storing a liquefied fuel, a pump for providing and compressing a first stream of the liquefied fuel, a heat exchanger for provide cooling duty to the first stream of the liquefied fuel, and an expansion valve for expanding the first stream of the liquefied fuel after the heat exchanger into a multiphase stream comprising a liquid phase and a gas phase. The multiphase stream has a temperature lower than an initial temperature of the first stream from the cryotank. The system further comprises a liquid-vapor splitter for separating the liquid phase and gas phase in the multiphase stream. The liquid phase is returned into the cryotank.

The invention relates to a method for operating a liquefied gas storage tank (1) having a tank volume (2) for receiving LNG and boil-off gas (BOG), wherein a gaseous BOG stream and a liquid LNG stream are fed to the tank volume, and wherein the BOG stream is introduced into the LNG stream, and wherein subsequently the resulting BOG-LNG mixture is introduced into the tank volume. The invention also relates to a corresponding liquefied gas storage tank.

A fuel system for a liquefied gas drive system. The fuel system has a liquefied gas tank and a cooling system for the vaporized content of liquefied gas, which comprises a liquid nitrogen tank, a nitrogen pump, a heat exchanger, and a nitrogen cooler, which are connected to each other in a pipework circuit. The heat exchanger is arranged in the interior of the liquefied gas tank. Also disclosed are a vehicle, a plant and a machine, in each case with a fuel system, and a method for cooling the vaporized content of liquefied gas of a liquefied gas drive system.

A method for managing boil-off from an LNG tank located on board of an aircraft. The method, including removing the boil-off from the aircraft and disposing of the removed boil-off from the aircraft and an equipment assembly for use with an aircraft having an on-board LNG tank with a vent system having an outlet coupling, including a removal system configured to remove boil-off from the aircraft and a disposal system configured to dispose of the boil-off.

A cryogenic tank apparatus having a first cryogenic tank having a first medium therein; a first boil-off conduit fluidically connected to the first cryogenic tank, the first boil-off conduit having a first boil-off valve; a first nozzle fluidically connected to the first boil-off conduit; a second cryogenic tank having the first medium therein; a second boil-off conduit fluidically connected to the second cryogenic tank; and a boil-off management system (BOMS) to receive flow of the first medium from the first cryogenic tank through the first nozzle, and flow of the first medium from the second cryogenic tank. The BOMS has a mixing chamber, a catalyst downstream of the mixing chamber, an outlet of downstream of the catalyst, and an air supply conduit through which flows a second medium, the mixing chamber being operable for mixing the first medium from the first cryogenic tank and the first medium from the second cryogenic tank with the second medium from the air supply conduit.

Apparatus for supplying natural gas fuel to an ocean-going tanker for the transport of liquefied natural gas (LNG), includes a first line with a compressor (12) having an inlet communicating with an ullage space (4) of at least one LNG storage tank (2) and an outlet communicating with a conduit leading from the compressor to at least one engine (38), and a second line with a forcing vaporiser (24) having an inlet communicating with a liquid storage region (6) of the tank (2), the second line being connected to the first line downstream of the compressor (12) and upstream of the at least one engine (38).

A method and system for determining a momentary boil-off rate for a storage tank for a natural gas in liquid phase and gas phase. A mass flow from the gas phase of the natural gas at an discharge pipeline of the storage tank and a mass flow into the liquid phase of the natural gas at an loading/discharge pipeline of the storage tank is determined. A volume, a temperature and a pressure of the gas phase of the natural gas is measured. A dynamical model is applied to the determined values to determine the momentary boil-off rate.

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.

The invention relates to a of processing a liquid natural gas stream at a LNG import terminal. The method comprises operating a vaporization unit obtaining a pressurized vaporized natural gas stream and operating a slushification unit to obtain a slush of liquid and solids and a cooled vapour phase. The method further comprises withdrawing the cooled vapour phase from the slushifier providing a cooled vapour stream and passing the cooled vapour stream to the vaporization unit.