Device and method for testing exposure of precooled hydrogen

Abstract

The invention discloses a device and method for testing exposure of precooled hydrogen, and relates to the technical field of precooled hydrogen exposure testing. The device comprises a measurement and control system, and a supercharger, a hydrogen buffer gas tank, a heat exchanger, a pressure reducing valve, a to-be-tested valve and a hydrogen recovery system which are sequentially communicated through a high-pressure hydrogen pipe. The hydrogen recovery system comprises a recovery gas path A and a recovery gas path B which are connected in parallel. The measurement and control system comprises a PID controller. The PID controller is in electric signal connection with a pressure sensor c, a pressure sensor d and a flow value meter. The PID controller controls the opening degree of the valve element of the pressure reducing valve according to the front air pressure value, the rear air pressure value and the flow value so as to achieve the test pressure and the test flow required by the test of the to-be-tested valve, and meanwhile hydrogen is cooled through the porous heat exchanger; and the test requirements of low-temperature, continuous and high-flow hydrogen are met.

Description

technical field [0001] The invention belongs to the technical field of precooling hydrogen exposure testing, in particular to a testing device and a testing method for precooling hydrogen exposure. Background technique [0002] With the rapid development of fuel cell electric vehicles, the detection of key components of the on-board hydrogen storage system is particularly important. "GB / T Fuel Cell Electric Vehicle Hydrogen Refueling Port" Compatibility Test, "GB / T 35544 Automotive Compressed Hydrogen Aluminum Liner Carbon Fiber Fully Wound Gas Cylinder" Appendix B3.2.9 Precooling Hydrogen Exposure Test, "ISO 17268 Geseous hydrogen land vehicle refueling Connection devices", all simulate the fuel cell vehicle filling conditions; it needs to conduct tests with ultra-large flow and continuous high-pressure hydrogen, and the pre-cooling hydrogen exposure test even stipulates that the test uses high-pressure hydrogen at -40°C. [0003] There are two major difficulties in this t...

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Problems solved by technology

[0003] There are two major difficulties in this type of test: first, continuous, low-temperature, high-flow hydrogen is required during the test, and the cooling of hydrogen and the large temperature rise generated during the test need to be solved; second, hydrogen is flammable and explosive. Gas, how to recover or empty the hydrogen after the test is related to the safety of life and property

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