Safety system for wind tunnel type fuel cell environmental chamber

Abstract

The invention discloses a safety system for a wind tunnel type fuel cell environmental chamber. The safety system comprises an air duct and a chamber body, the air duct is connected with the cabin body and is used for injecting hydrogen into the cabin body and guiding the hydrogen out of the cabin body; hydrogen concentration detection devices are arranged on the air duct and the cabin body; a main hydrogen discharging opening, a nitrogen inlet and a heptafluoropropane inlet are formed in the top of the cabin body; and a main hydrogen discharge fan is arranged on the main hydrogen discharge port. A plurality of hydrogen sensor sampling points, an infrared and video sensor and a smoke sensor are arranged in a cabin body and an air duct of the wind tunnel type fuel cell environment test cabin in a distributed and three-dimensional mode, and automatic control is achieved through a controller in combination with an alarm system, a loading control end, a hydrogen supply valve, an electric door lock, a strong exhaust fan, nitrogen conversion, fire extinguishing agent injection and the like. The safety system for the wind tunnel type fuel cell environmental chamber has the advantages of being capable of avoiding hydrogen gathering in the chamber, providing a safe operation environment for a fuel cell system and the like.

Description

technical field [0001] The invention relates to a hydrogen fuel cell testing system, in particular to a safety system for a wind tunnel type fuel cell environment chamber. Background technique [0002] With the increasingly serious energy crisis and environmental pollution problems, new energy vehicles have gained opportunities for rapid development. A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. The basic principle is the reverse reaction of electrolyzed water. Hydrogen and oxygen are supplied to the anode and cathode respectively. After the hydrogen diffuses outward through the anode and reacts with the electrolyte, electrons are released to reach the cathode through an external load. Hydrogen fuel cell vehicles are truly zero-emission and zero-pollution vehicles, and hydrogen fuel is the perfect vehicle energy source. As the ultimate clean energy, hydrogen fuel cell vehicles hav...

AI Technical Summary

Problems solved by technology

[0005] 1) The traditional environmental test chamber adopts the flow field method of convection in the chamber. Due to the large heat capacity of the chamber and the fast flow rate of the air circulation process, local eddies are easily generated in it, which leads to the inability to separate and discharge the hydrogen-containing air in the air in the chamber.

[0006] 2) Due to the flat top structure of the traditional environmental test chamber, it is easy to form a thin layer of hydrogen film on the top of the chamber due to the adsorption of hydrogen by metals.

[0007] 3) Because the density of hydrogen is higher than that of air, it is easy to cause local collection of hydrogen in the dead corner of the cabin

[0008] 4) The molecular weight of hydrogen is quite different from that of air, and it cannot be evenly mixed with air, so the sampling of ordinary pump suction sensors cannot reflect the actual concentration and distribution of hydrogen in the cabin

[0009] 5) The traditional test chamber lacks a professional safety judgment and disposal strategy, resulting in high-risk operation of the equipment between false alarms and accidental symptoms

Images