Device and method for reducing evaporation rate of liquid hydrogen storage tank by using liquid nitrogen cooling capacity

Abstract

The invention discloses a device and a method for reducing the evaporation rate of a liquid hydrogen storage tank by using liquid nitrogen cooling capacity. The device comprises the liquid hydrogen storage tank, a liquid nitrogen storage tank and instrument gas, wherein the liquid hydrogen storage tank comprises a liquid hydrogen storage tank inner tank and a liquid hydrogen storage tank outer tank, high-vacuum multiple heat insulation layers are arranged between the liquid hydrogen storage tank inner tank and the liquid hydrogen storage tank outer tank, the liquid nitrogen storage tank is connected with the instrument gas through a liquid nitrogen liquid discharge pipe, the outer side wall of the liquid hydrogen storage tank outer tank is connected with a liquid nitrogen discharge pipe ina wound mode from top to bottom, the two ends of the liquid nitrogen discharge pipe are connected with the instrument gas and the liquid nitrogen liquid discharge pipe correspondingly, liquid nitrogen enters the liquid nitrogen liquid discharge pipe from the liquid nitrogen storage tank and then flows into the instrument gas through the liquid nitrogen discharge pipe, and the temperature of the liquid nitrogen in the liquid nitrogen discharge pipe is -150 DEG C or below. According to device and the method for reducing the evaporation rate of the liquid hydrogen storage tank by using the liquid nitrogen cooling capacity, heat transfer temperature difference of the liquid hydrogen storage tank can be effectively reduced, so that the effect of reducing the natural evaporation rate of the liquid hydrogen storage tank is achieved.

Description

technical field [0001] The invention relates to the field of storage and transportation of liquid hydrogen, in particular to a device and a method for reducing the evaporation rate of a liquid hydrogen storage tank by utilizing the cooling capacity of liquid nitrogen. Background technique [0002] Hydrogen is recognized as a clean energy source. Hydrogen-fueled vehicles are recognized as environmentally friendly vehicles and the general direction of future automobile development. The storage and transportation of hydrogen (including high-pressure hydrogen and liquid hydrogen) fuel is an important link in the development of hydrogen-fueled vehicles. [0003] With the continuous development of hydrogen fuel vehicles, the market demand for hydrogen will increase. In the process of hydrogen utilization, the storage and transportation of hydrogen (including high-pressure hydrogen and liquid hydrogen) is an important part of hydrogen utilization. The physical storage and transpor...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the evaporation rate of the existing liquid hydrogen storage tank is relatively high during use, and the cost and use efficiency are poor, which is not convenient for long-term use. Device and method for reducing the evaporation rate of liquid hydrogen storage tanks by cooling capacity, solving the problem of using liquid hydrogen storage tanks

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