Simulation test method for the effect of backflow of fuel cell stack gas components

Abstract

The invention discloses a simulation test method for the impact of backflow of fuel cell stack gas components, and relates to the field of hydrogen proton exchange membrane fuel cell testing. The simulation test system is used to generate tail gas for the stack of the stack operating system with a tail gas backflow device. Carry out flow and composition analysis, and calculate the flow rate and composition of the gas entering the stack according to the reflux ratio, and use the flow and composition of the gas entering the stack to readjust the gas flow and composition at the gas source to simulate the gas entering the stack under actual reflux conditions Flow rate and composition, run the stack and test it, record the data relationship between the relevant components and the total amount and the performance of the stack according to the time, the real exhaust gas does not return to the stack inlet; through the simulation test, a stable experimental condition close to the reflux method is obtained , which can avoid the adverse effects on the experimental data caused by the coupling fluctuation of complex working conditions caused by the direct return of the outlet gas and the mixing of the inlet gas, so as to stably obtain the performance detection of the stack under the condition of exhaust gas reflow.

Description

technical field [0001] The invention relates to the field of hydrogen proton exchange membrane fuel cell testing, in particular to a simulation test method for the effect of backflow of fuel cell stack gas components after cathode and anode working gases pass through the stack reaction. Background technique [0002] The performance test of fuel cells (PEMFC and SOFC, etc.) has many contents, including the operation analysis of two working gases as fuel and oxidant, the analysis of the composition and content of the gas source, the composition change under the operating conditions of the stack, and if There is exhaust gas returning to the stack, which affects the performance of the stack. [0003] Taking the anode fuel gas hydrogen of hydrogen proton exchange membrane fuel cells as an example, the fuel is generally high-content hydrogen or high-purity hydrogen. Under actual operating conditions, the anode tail gas is directly discharged from the stack or circulated back into ...

AI Technical Summary

Problems solved by technology

However, there is still a lack of relevant technology to apply the change of the actual components after passing through the stack to the feedback management of the backflow intake of the stack, and there is a lack of technical solutions for analyzing the impact of the change on the operation of the stack and optimal control

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