Cryogenic liquid delivery and pressurization system and method with active pressurization capability
A cryogenic liquid, pressurization system technology, applied in the method of container discharge, equipment discharged from pressure container, power unit, etc., can solve the problems of increasing the weight and space of the vehicle chassis, and quickly collapsing.
Active Publication Date: 2017-11-14
U S BANK TRUST CO NAT ASSOC AS THE NOTES COLLATERAL AGENT
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Problems solved by technology
Second, since LNG truck tanks are used in mobile applications, any gas phase pressure built up above the liquid phase will quickly collapse once the vehicle is in motion and the liquid and gas phases mix
However, this solution requires the installation of a second tank for CNG on the vehicle, which will add a high-pressure CNG tank, which also needs to be regularly filled with high-pressure gas, and increases the weight and space occupied on the vehicle chassis
Method used
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[0018] Although the invention is described below in terms of liquefied natural gas (LNG) as the cryogenic liquid, it should be understood that the invention is not limited thereto but may be used with other types of cryogenic liquids in other applications.
[0019] The LNG delivery and pressurization system described below actively forces gaseous natural gas back into the on-board fuel tank by including a compressor or pump in a parallel path downstream of the carburetor, adding pressure to the tank at a rate much greater than can be accomplished with passive systems The body overcomes the aforementioned defects in the prior art. Compressor operation is controlled by a control system that monitors the system pressure, turning on the compressor when the system pressure is low and turning off the compressor when the system pressure reaches a predetermined point. Once the liquid reaches the desired saturation, the LNG transfer and pressurization system will function as described ...
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The invention relates to a cryogenic liquid delivery and pressurization system, which includes a tank adapted to accommodate a cryogenic liquid supply. The tank includes an upper gas phase space adapted to accommodate a gas phase above the cryogenic liquid stored in the tank. gas. The liquid supply line is suitable for communicating with the cryogenic liquid stored in the tank. The vaporizer has an inlet connected to the liquid supply line and an outlet connected to the gas phase line. The pressurization circuit is connected with the gas phase pipeline and the gas phase space in the tank. The pressurization circuit includes a mechanical flow guide device and a controller, the controller is used to activate the mechanical flow guide device when the pressure in the gas phase space of the tank drops below a predetermined minimum pressure and / or other conditions exist.
Description
technical field [0001] The present application relates generally to cryogenic delivery and pressurization systems and methods, and more particularly, to cryogenic liquid delivery and pressurization systems and methods with active pressure building capabilities. Background technique [0002] The present invention relates to systems and methods for the transfer and pressurization of cryogenic liquids, such as liquefied natural gas (LNG), from storage tanks to applications, such as natural gas powered vehicle engines. The embodiment of the system of the present invention is particularly suitable for LNG fuel tanks for vehicles that do not implement LNG fuel to reach the desired saturation in advance. When the pressure in the tank is below a predetermined pressure level, the system of the present invention can supplement heat and improve Saturation and the effect of increasing the pressure inside the tank. [0003] Many heavy duty vehicle engines require natural gas inlet press...
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IPC IPC(8): F17C7/02F17C13/02
CPCF02M21/0215F02M21/0221F02M21/023F02M21/0287F17C7/04F17C2201/056F17C2201/058F17C2205/0134F17C2221/033F17C2223/0153F17C2223/0161F17C2227/0107F17C2227/0302F17C2227/0393F17C2265/066F17C2270/0178Y02T10/30B60K2015/03013F17C7/02F17C2270/0107
Inventor K.古斯塔夫森E.古斯塔夫森L.霍尔辛格J.帕特尔齐克P.默里
Owner U S BANK TRUST CO NAT ASSOC AS THE NOTES COLLATERAL AGENT