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Hydrogen liquefaction equipment adopting helium refrigeration cycle system

A circulation system and helium technology, applied in the field of hydrogen liquefaction equipment, can solve the problems of high energy consumption, low liquefaction efficiency, and high energy consumption, and achieve the effect of low energy consumption and high hydrogen liquefaction efficiency

Pending Publication Date: 2021-02-12
BEIJING INST OF AEROSPACE TESTING TECH +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The liquefaction temperature of hydrogen is very low, so it can only be liquefied by cooling the hydrogen below a certain temperature, but the cooling and liquefaction process of hydrogen requires a lot of energy, resulting in low liquefaction efficiency and high energy consumption.

Method used

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  • Hydrogen liquefaction equipment adopting helium refrigeration cycle system
  • Hydrogen liquefaction equipment adopting helium refrigeration cycle system

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Embodiment Construction

[0034]The present invention will be described in detail below with reference to the drawings and embodiments.

[0035]It should be noted that the hydrogen liquefaction equipment of the present invention is suitable for small-scale liquid hydrogen production requirements that produce less than 2.5 tons of liquefied hydrogen per day. Hydrogen is a diatomic molecule, and the two hydrogen nuclei rotate around their axes. According to the relative direction of the two nuclear spins, hydrogen molecules can be divided into normal hydrogen and para hydrogen. Normal hydrogen is a mixture of these two forms of hydrogen molecules. The equilibrium concentration of para-hydrogen is only related to temperature. The hydrogen whose concentration of para-hydrogen reaches a stable equilibrium at different temperatures is called equilibrium hydrogen. At temperatures above room temperature, it contains 75% normal hydrogen and 25% para hydrogen. At a saturation temperature of 20.4K, the equilibrium concent...

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Abstract

The invention discloses hydrogen liquefaction equipment adopting a helium refrigeration cycle system. The hydrogen liquefaction equipment comprises a vacuum box, a hydrogen purification device, a pre-cooling device, a first low-temperature adsorber, a heat exchanger, an orthohydrogen-to-parahydrogen converter, a throttling expansion valve, the helium refrigeration cycle system and a liquid hydrogen storage tank, wherein the pre-cooling device, the first low-temperature adsorber, the heat exchanger, the orthohydrogen-to-parahydrogen converter and the throttling expansion valve are all mounted in the vacuum box; and the helium refrigeration cycle system takes helium as a refrigeration working medium and is used for providing cold energy required by hydrogen liquefaction through heat exchangewith the heat exchanger. The hydrogen liquefaction equipment has the advantages that the liquefaction efficiency is improved and the energy consumption is reduced.

Description

Technical field[0001]The invention relates to the technical field of hydrogen energy utilization, in particular to a hydrogen liquefaction equipment using a helium refrigeration cycle system.Background technique[0002]As the global climate and environmental protection situation becomes increasingly severe and the pressure to respond to climate change continues to increase, hydrogen energy has attracted worldwide attention, and energy supply reform has become a hot spot of social politics, economy, and technology. According to the "Research Report on Future Development Trends of Hydrogen Energy" issued by the International Hydrogen Energy Commission, it is estimated that by 2050, the demand for hydrogen energy will be 10 times the current.[0003]Hydrogen energy utilization needs to solve a series of problems such as production, storage and transportation, and application, while large-scale storage and transportation is the bottleneck and key to hydrogen energy application. The volumetr...

Claims

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Application Information

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IPC IPC(8): F25J1/02
CPCF25J1/0244F25J1/0257F25J1/001F25J2250/02F25J2220/02F25J1/0204F25J1/0221F25J2210/42F25J2205/60F25J1/025F25J1/005F25J1/0065F25J2270/16F25J2205/82
Inventor 安刚解辉苏嘉南余炳延赵康妙从王嘉炜任博文
Owner BEIJING INST OF AEROSPACE TESTING TECH
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