Fixed type multi-layered vacuum heat-insulating high-pressure liquid hydrogen storage tank

Abstract

The invention relates to the field of development of hydrogen energy source storage equipment, and aims to provide a fixed type multi-layered vacuum heat-insulating high-pressure liquid hydrogen storage tank. The liquid hydrogen storage tank comprises an inner tank and an outer tank; a fiber enhanced epoxy resin based composite material layer covers the outer shell of the inner tank and is fixed in a chamber body of the outer tank by a supporting part; the inner tank and the outer tank are of vacuum heat-insulating interlayers; multiple vacuum radiation-prevention heat insulating layers covering the whole inner tank are paved in the vacuum heat-insulating interlayers; a vacuumizing device and a vacuum meter which communicate with the vacuum heat-insulating interlayers are arranged on the outer tank. By comprehensively considering two factors of the temperature and the pressure in a hydrogen phase chart, the used fiber-wound aluminum inner container can bear the pressure, and the hydrogen storage density is improved more, the waste is avoided and an overpressure condition is also prevented, and the safety of the structure is ensured. The fixed type multi-layered vacuum heat-insulating high-pressure liquid hydrogen storage tank is suitable for liquid hydrogen filling stations and gas-state hydrogen filling stations.

Description

technical field [0001] The invention belongs to the field of hydrogen energy storage equipment development, in particular to a fixed multi-layer vacuum heat-insulated high-pressure liquid hydrogen storage tank. Background technique [0002] With the emergence of energy crisis and environmental problems, replacing existing fossil fuel vehicles with clean energy vehicles is one of the important ways to solve energy and environmental problems. As a green energy and energy carrier with abundant reserves, wide sources and high energy density, hydrogen energy has attracted widespread attention in recent years. Hydrogen fuel cell vehicles powered by hydrogen energy have high energy conversion rate and fuel economy. Good, zero emissions and other advantages, has become the most popular research field. The promotion and use of hydrogen fuel cell vehicles is premised on the improvement of supporting facilities. Hydrogen refueling stations are the most important basic supporting facil...

AI Technical Summary

Problems solved by technology

According to investigations, the daily evaporation loss of atmospheric pressure liquid hydrogen storage is about 1%, which causes a lot of waste of hydrogen energy

The hydrogen storage density of normal temperature and high pressure hydrogen storage is limited by the pressure. The current hydrogen storage pressure has reached 70MPa, but its hydrogen storage density is only 38kg / m 3 or so, compared to liquid hydrogen, the hydrogen storage density is very low

To increase the hydrogen storage density, it is necessary to increase the hydrogen storage pressure, which poses a challenge to the safety and storage cost of the container. Therefore, the contradiction between hydrogen storage density, hydrogen storage pressure, safety, and economy limits this technology. further development of

At the same time, the weight and volume of the high-pressure hydrogen storage container are large, and the compression cost of hydrogen also increases the total cost. These factors also limit its application in hydrogen storage equipment in hydrogen refueling stations.

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