Hydrogen circulatory system

Abstract

The invention belongs to the technical field of hydrogen fuel cells, and in particular relates to a hydrogen circulatory system. The hydrogen circulatory system comprises a hydrogen ejector, a fuel cell, a stepping motor and a connecting passage, wherein the fuel cell is connected to the hydrogen ejector through a connecting pipe; the hydrogen ejector drives ball screw drive through the stepping motor; an ejector body is disposed on the hydrogen ejector; the ball screw is in threaded connection with a connecting body on the ejector body for drive; and the valve body of the hydrogen ejector andthe fuel cell form a circuit through the connecting pipe. The hydrogen circulatory system has the beneficial effects that a jet flow generated by the hydrogen ejector drives the hydrogen to circulatein the system so as to increase a hydrogen utilization rate, improve water balance in a fuel cell galvanic pile, and prevent flooding; and hydrogen ejector has good sealing performance; according tothe demands for different loads, the hydrogen circulation speed and hydrogen supply amount can be adjusted to meet the hydrogen demands of the hydrogen circulatory system under various working conditions.

Description

technical field [0001] The invention belongs to the technical field of hydrogen fuel cells, and in particular relates to a hydrogen circulation system. Background technique [0002] Traditional power systems, whether it is a gasoline engine or a diesel engine, need to convert chemical energy into heat energy through combustion, and then convert heat energy into mechanical energy. During the conversion process, harmful gases such as COx, NOx, and SOx will be released. And PM particles and other pollutants, low thermal efficiency, and pollute the environment. Hydrogen fuel cells use hydrogen to carry out the reverse reaction of electrolyzing water, and supply hydrogen and oxygen to the anode and cathode respectively. Under the action of the catalyst, the hydrogen releases electrons, and the hydrogen ions flow to the cathode through the proton exchange membrane, while the electrons arrive through the external cycle. At the cathode, an electric current is generated, and hydroge...

AI Technical Summary

Problems solved by technology

First of all, the molecular weight of hydrogen is small, and hydrogen at a certain pressure is easy to leak. In the working process of the hydrogen injector in the hydrogen circulation system of the current structure, the sealing of hydrogen is a difficult problem

Secondly, after the hydrogen injector is fixed in the hydrogen circulation system, the fixed position cannot be changed. As a result, when working in different working conditions, hydrogen can only be injected at a limited position, and it is difficult for hydrogen injection to meet the needs of all working conditions.

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