High-efficiency liquefied natural gas vaporization and phase change cool storage device

Abstract

The invention discloses a high-efficiency liquefied natural gas vaporization and phase change cool storage device. The high-efficiency liquefied natural gas vaporization and phase change cool storagedevice comprises a housing, a heat exchange baffle, a natural gas pipeline, a plurality of phase change cool storage spheres; the heat exchange baffle is arranged in the housing and used for dividingthe housing into a first cavity and a second cavity; liquefied natural gas is introduced into the natural gas pipeline; the natural gas pipeline extends into the first cavity, passes through the heatexchange baffle, and then extends out of the second cavity; the phase change cool storage spheres are arranged in the second cavity; gaps between the first cavity and the natural gas pipeline are filled with a first coolant; gaps among the second cavity, the natural gas pipeline and the phase change cool storage sphere are filled with a second coolant; and the interiors of the phase change cool storage spheres are filled with a phase change material. The vaporization efficiency of the liquefied natural gas can be improved, cold energy in the vaporization process is recovered, and the energy issaved. The high-efficiency liquefied natural gas vaporization and phase change cool storage device is simple in structure and easy to realize, and can be widely applied to small liquefied and compressed natural gas gasification stations.

Description

technical field [0001] The invention relates to the field of heat exchanger equipment, in particular to a high-efficiency liquefied natural gas vaporization phase change cold storage device. Background technique [0002] Liquefied, compressed natural gas (L-CNG) refueling station fills compressed natural gas vehicles by pressurizing and gasifying the liquefied natural gas stored in the tank. At present, the vaporization equipment of L-CNG filling stations are mainly air-temperature and water-bath vaporizers. In summer, the outlet temperature of natural gas can reach a maximum of 15°C, which can be directly transported to compressed natural gas (CNG) storage cylinders. When the temperature is low or the humidity is high In the case of natural gas, in order to prevent the natural gas at low temperature from damaging the CNG gas storage cylinder and gas filling pipeline, it is necessary to use a water bath vaporizer to reheat the natural gas. If the carburetor runs for a long ...

AI Technical Summary

Problems solved by technology

If the carburetor runs for a long time and its fins are frosted, it is necessary to switch the carburetor, which is not convenient for the operation of the gas filling station; for the air-heated carburetor, due to its large volume, the installation cost of the gas filling station is high, and the heat exchange low efficiency

In addition, after the heat exchange of LNG through the vaporizer, a lot of cold energy is wasted, which is not conducive to energy saving and environmental protection

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