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Method of using H2 purge for stack startup/shutdown to improve stack durability
Method of using H2 purge for stack startup/shutdown to improve stack durability
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机译:使用H2吹扫进行堆栈启动/关闭以提高堆栈耐久性的方法
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摘要
A method of fuel cell shutdown and start-up is provided. The method of shutdown includes introducing hydrogen gas into the cathode passages to purge a cathode gas from the cathode passages, then introducing air through the cathode and anode passages to remove water droplets and vapor from the fuel cell stacks. The method from fuel cell start-up includes introducing hydrogen gas into the anode and cathode passages to consume/purge oxygen in both the anode and cathode passages, and then introducing a cathode gas into the cathode passages. The introduction of hydrogen into the cathode passages in both the shutdown and start-up procedures allow a rapid draw down of the anode/cathode open circuit voltage and avoids providing a hydrogen/air front while the cathode is filled with air.
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