Liquid hydrogen storage type hydrogen refueling station mixed filling system

Abstract

The invention discloses a liquid hydrogen storage type hydrogen refueling station mixed filling system. The system comprises a 35 MPa hydrogen filling unit and a 70 MPa hydrogen filling unit which are connected with a liquid hydrogen storage tank, each of the two filling units comprises a liquid hydrogen pump communicating with the liquid hydrogen storage tank, a fluid separator for changing the flow direction and flow of hydrogen and a high-pressure vaporizer, the 35MPa hydrogen filling unit further comprises a 90MPa buffer bottle group, a 45MPa buffer bottle group and a first hydrogen filling machine, and the 70MPa hydrogen filling unit further comprises a second liquid hydrogen conveying pipe, a high-pressure hydrogen conveying pipe, a gas-liquid mixer and a second hydrogen adding machine. The system has the advantages that the hydrogen storage capacity is large, the energy consumption is low, and the filling requirements of different forms of hydrogen can be met.

Description

technical field [0001] The invention relates to the technical field of liquid hydrogen refueling stations, in particular to a liquid hydrogen storage type hydrogen refueling station mixing filling system. Background technique [0002] Hydrogen refueling stations are mainly divided into two types: high-pressure hydrogen storage and refueling stations and liquid hydrogen storage and refueling stations. At present, the technology of foreign liquid hydrogen storage and refueling stations is relatively mature. Bottles are filled. Domestic hydrogen refueling stations are mainly high-pressure hydrogen storage hydrogen refueling stations, and most of them can only refill hydrogen fuel cell vehicles using 35MPa vehicle-mounted hydrogen storage bottles. The filling technology for 70MPa vehicle-mounted hydrogen storage bottles is still in the research and development stage. It is less used in hydrogen stations. The defects of the current hydrogen refueling stations using high-pressur...

AI Technical Summary

Problems solved by technology

Domestic hydrogen refueling stations are mainly high-pressure hydrogen storage hydrogen refueling stations, and most of them can only refill hydrogen fuel cell vehicles using 35MPa vehicle-mounted hydrogen storage bottles. The filling technology for 70MPa vehicle-mounted hydrogen storage bottles is still in the research and development stage. Less use in hydrogen stations

The defects of the current hydrogen refueling stations using high-pressure technology for hydrogen storage are: 1. The hydrogen storage capacity is low, and the daily hydrogen refueling capacity is 200kg / day, which can only basically meet the refueling requirements of vehicles during small-scale demonstration operations, and cannot meet the requirements of With the development of the hydrogen fuel cell vehicle industry, there is an increasing demand for filling volume; 2. Only 35MPa high-pressure hydrogen can be filled, and the filling form is single, which cannot take into account the 35MPa and 70MPa passenger car hydrogen storage cylinders currently on the market 3. It is necessary to cool the hydrogen at the filling outlet, and the energy consumption of the hydrogen refueling station is relatively large

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