Device for compensating for fluctuations in fuel concentration in fuel cell systems

    公开(公告)号:US06627341B2

    公开(公告)日:2003-09-30

    申请号:US09837421

    申请日:2001-04-19

    IPC分类号: H01M804

    CPC分类号: H01M8/04089 H01M8/0612

    摘要: A device for compensating for fluctuations in the concentration of a gaseous constituent in the fuel gas stream of a dynamically operated fuel cell system, has a buffer component arranged in the fuel gas stream, provided downstream of a component of the fuel cell system which is to be protected. The buffer component takes up the gaseous constituent from the fuel gas stream in the event of the partial pressure rising and releases the gaseous constituent back into the fuel gas stream in the event of the partial pressure dropping. According to the invention, the buffer component contains a material for the adsorption or absorption of the gaseous constituent that has a take-up capacity which is dependent on the partial pressure.

    Method for operating a fuel cell system
    5.
    发明授权
    Method for operating a fuel cell system 失效
    操作燃料电池系统的方法

    公开(公告)号:US5989739A

    公开(公告)日:1999-11-23

    申请号:US801809

    申请日:1997-02-14

    IPC分类号: C01B3/38 H01M8/0612 H01M8/06

    CPC分类号: H01M8/0612 H01M2300/0082

    摘要: The invention relates to a method for operating a fuel cell system consisting of a fuel cell, a reformer for generating a hydrogen-rich gas, and a combustion chamber in which the fuel cell exhaust gases are oxidized to generate the heat energy required in the reformer. According to the invention, in those operating states in which the heat energy supplied to the reformer from the combustion chamber is insufficient, additional amounts of fuel and oxygen are supplied to the reformer, so that additional heat energy is produced directly in the reformer by the oxidation of the fuel. At the same time, during the oxidation of the fuel in the reformer, steam is produced that can be used in steam reformation. Advantageously, adjustment of the additional amount of fuel and the oxygen supplied is performed as a function of the reformer temperature.

    摘要翻译: 本发明涉及一种操作燃料电池系统的方法,该燃料电池系统包括燃料电池,用于产生富氢气体的重整器和燃烧室,其中燃料电池废气被氧化以产生重整器中所需的热能 。 根据本发明,在从燃烧室供给到重整器的热能不足的那些运行状态下,向重整器供给额外量的燃料和氧气,从而直接在重整器中产生额外的热能 燃料的氧化。 同时,在重整器中的燃料氧化过程中,产生可用于蒸汽重整的蒸汽。 有利地,作为重整器温度的函数来执行附加量的燃料和供应的氧气的调整。