Double-ejector circulating system of proton exchange membrane fuel cell

Abstract

The invention provides a double-ejector circulating system of a proton exchange membrane fuel cell, which belongs to the technical field of proton exchange membrane fuel cells. The double-ejector circulating system is characterized in that an anode water-vapor separator and a cathode water-vapor separator are used for separating and removing liquid water in tail gas of an anode and a cathode of a galvanic pile; the anode pressure reducing valve and the cathode pressure reducing valve respectively reduce the pressure of the hydrogen and the pressure of the oxygen to preset pressure values; the anode electromagnetic valve and the cathode electromagnetic valve are used for regularly executing pulse type switching actions and removing accumulated water and impurities on two sides of the galvanic pile; the anode one-way valve and the cathode one-way valve prevent external air from entering the circulation loop at the exhaust moment; the anode ejector and the cathode ejector are used for respectively receiving hydrogen and oxygen to the mixing chamber, unreacted tail gas is entrained in a low-pressure area in the mixing chamber, and the hydrogen or the oxygen and the tail gas are subjected to momentum and mass exchange and then enter the galvanic pile. Water logging caused by circulation is greatly avoided, the performance of the fuel cell can be improved, and the service life of the fuel cell can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of proton exchange membrane fuel cells, and more specifically relates to a double ejector circulation system of a proton exchange membrane fuel cell. Background technique [0002] Hydrogen energy is an important new energy source. It has the characteristics of wide sources, clean and pollution-free, convenient storage and transportation, and high utilization rate. It is known as the most promising secondary energy source in the 21st century. The proton exchange membrane fuel cell is an energy conversion device that converts the chemical energy of fuel (hydrogen, oxygen) into electrical energy. The proton exchange membrane fuel cell has high energy conversion efficiency, reliable operation, no pollutant emissions, and few moving parts. It is considered to be the most promising green energy conversion device that can replace traditional fossil energy due to its advantages such as noise and the reaction process...

AI Technical Summary

Problems solved by technology

[0006]Aiming at the defects of the prior art, the purpose of the present invention is to provide a kind of proton exchange membrane fuel cell double injector circulation system, aiming to solve the existing fuel cell The water management technology lacks consideration of the auxiliary drainage of the cathode injection cycle, which leads to the frequent flooding of the existing fuel cells, which in turn affects the performance and life of the fuel cells.

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