Systems and methods for using a multi-stage compressor to increase the temperature and pressure of BOG sent to a heat exchanger for cooling a separate liquid refrigerant. The subsequent stage(s) of the multi-stage compressor further compress the BOG, which is then recycled to a liquefaction unit or used as fuel gas for one or more turbines.

Disclosed herein are a diagnostic method using laser induced breakdown spectrum analysis and a diagnostic device for performing the same. The diagnostic device may include a laser projection module projecting a pulsed laser to a specimen, a light receiving module receiving a light generated by a plasma ablation induced at the specimen by the pulsed laser, a spectral member receiving and dividing the light generated by the plasma ablation; a sensor array including a plurality of sensors arranged to receive the divided light for each wavelength, and a controller obtaining spectrum data of the light generated by the plasma ablation from a specific exposure period, and determining whether or not the specimen is diseased based on the spectrum data of the light generated by the plasma ablation.

A cold recovery facility includes: a first fuel tank configured to store a first fuel in liquid state; a second fuel tank configured to store a second fuel in liquid state having a liquefaction temperature higher than the liquefaction temperature of the first fuel; a first circuit configured to circulate a first medium; a first expansion turbine provided on the first circuit and configured to expand the first medium in gaseous state; a first heat exchanger provided downstream of the first expansion turbine on the first circuit and configured to condense the first medium; a pump provided downstream of the first heat exchanger on the first circuit and configured to boost the first medium; a second heat exchanger provided downstream of the pump on the first circuit and configured to vaporize the first medium; and a third heat exchanger provided downstream of the second heat exchanger and upstream of the first expansion turbine on the first circuit, wherein the first heat exchanger is configured to vaporize the first fuel by heat exchange between the first fuel in liquid state from the first fuel tank and the first medium, and the third heat exchanger is configured to vaporize the second fuel by heat exchange between the second fuel in liquid state from the second fuel tank and the first medium.

A cold heat recovery system includes a first cold heat recovery cycle including a first expansion turbine and configured to circulate a first heat medium, a second cold heat recovery cycle including a second expansion turbine and configured to circulate a second heat medium, a first heat exchanger provided on a downstream side of the first expansion turbine on the first cold heat recovery cycle and configured to transfer cold energy from a first fuel to the first heat medium, a second heat exchanger configured to transfer cold energy from a second fuel to the first fuel flowing on a downstream side of the first heat exchanger and reliquefy the first fuel, and a third heat exchanger provided on a downstream side of the second expansion turbine on the second cold heat recovery cycle and configured to transfer cold energy to the second heat medium from the first fuel flowing on a downstream side of the second heat exchanger.

A rocket propulsion system comprising a first cryogenic tank and a second cryogenic tank, wherein the first cryogenic tank is filled with a first propellant, and the second cryogenic tank is filled with a second propellant, for purposes of feeding at least one repeatedly ignitable main propulsion unit in a propulsion phase of the rocket propulsion system. For purposes of tank pressurization via at least a low level of acceleration in a ballistic phase, a first auxiliary propulsion unit can be operated by means of a first gas pressure accumulator, and at least one further auxiliary propulsion unit can be operated by means of a further gas pressure accumulator, and the rocket propulsion system is assigned an energy conversion unit, which is designed at least to charge the first and the second gas pressure accumulator, preferably in the ballistic phase.

A gas fuel vehicle includes gas fuel engine, a gas fuel supply circuit comprising at least one tank assembly, the tank assembly including a gas fuel tank and a tank valve, an electronic central unit configured to control operation of the gas fuel vehicle, The tank assembly is provided with specific identification data, and the electronic central unit is configured to process the identification data of the tank assembly and to enable an actuation of the tank valve between closed and open states only if the identification data are recognized.

A system for powering a vehicle is provided. The system can include an engine or power generation system to be powered by a fuel and a housing. The housing can be configured to couple to one or more frame rails of the vehicle, receive and protect a cylinder configured to store the fuel to be used by the engine or power generation system. The housing can have one or more access panels allowing access to an interior of the housing. The cylinder can include a first end portion, a second end portion, a central body forming an enclosed cavity for storing pressurized gas, a reinforcement structure disposed over the central body, and a metal foil interposed between the reinforcement structure and central body. The metal foil can be configured to reduce permeation of contents of the cylinder.

The invention relates to a compressed gas storage tank, in particular for a motor vehicle, with a holder that is designed to store a compressed fuel, and with at least one pressure relief valve. Fuel is dischargeable from the holder into environment of the compressed gas tank due to the opening of at least one pressure relief valve. A catalytic converter device of the compressed gas storage tank designed to catalyze an oxidation reaction of fuel originating from the holder with oxygen. The compressed gas storage tank has at least one piezoelectric element to which a pressure can be applied by opening the at least one pressure relief valve Through the pressure, at least one spark can be generated by means of the at least one piezoelectric element. The invention furthermore relates to a method for operating a compressed gas storage tank of said type.

The present disclosure provides systems and methods for storing, transporting, and using hydrogen. In some embodiments, the method may comprise (a) storing hydrogen fuel in one or more fuel storage modules; (b) transporting the one or more fuel storage modules to a vehicle fueling site, wherein one or more hydrogen fuel compatible vehicles are located at or near the vehicle fueling site; (c) loading the one or more fuel storage modules into the one or more hydrogen fuel compatible vehicles, wherein the one or more fuel storage modules are configured to be releasably coupled to the one or more hydrogen fuel compatible vehicles; and (d) decoupling the one or more fuel storage modules from the one or more hydrogen fuel compatible vehicles after the one or more fuel storage modules are depleted or partially depleted.

Disclosed is a re-liquefying device using a boil-off gas as a cooling fluid so as to re-liquefy the boil-off gas generated from a liquefied gas storage tank provided in a ship. A boil-off gas re-liquefying device for a ship comprises: a multi-stage compression unit for compressing boil-off gas generated from a liquefied gas storage tank; a heat exchanger in which the boil-off gas generated from the storage tank and the boil-off gas compressed exchange heat; a vaporizer for heat exchanging the boil-off gas cooled by the heat exchanger and a separate liquefied gas supplied to a fuel demand source of a ship, and thus cooling the boil-off gas; an intermediate cooler for cooling the boil-off gas that has been cooled by the heat exchanger; and an expansion means for branching a part of the boil-off gas, which is supplied to the intermediate cooler, and expanding the same.