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    • 7. 发明申请
    • FUEL CELL SYSTEM COMPRISING AN EJECTOR FOR RECIRCULATING OFF-GAS FROM A STACK
    • 燃料电池系统,包括用于从堆叠再循环关闭气体的喷射器
    • WO2013029805A1
    • 2013-03-07
    • PCT/EP2012/051504
    • 2012-01-31
    • BELENOS CLEAN POWER HOLDING AGHOFER, MarcelBUECHI, FelixBERNARD, JérômeHANNESEN, UweDIETRICH, Philippe
    • HOFER, MarcelBUECHI, FelixBERNARD, JérômeHANNESEN, UweDIETRICH, Philippe
    • H01M8/04
    • H01M8/04097H01M8/04104H01M8/04619H01M8/04753H01M8/04783H01M2008/1095
    • The fuel cell system includes: - at least one fuel cell adapted to generate electrical energy from a fuel gas and an oxidizer gas; - a fuel feed duct (11) provided for supplying the fuel cell with fuel gas, the fuel feed duct including an upstream part (11A) and a downstream part (11B); - a Venturi effect ejector (113) including a high pressure inlet (233), a low pressure inlet (238) and an outlet (240), the upstream part of the fuel feed duct being connected to the high pressure inlet of the ejector and the downstream part extending between the ejector outlet and the fuel cell; - an off-gas recirculation duct (11R) extending between the fuel cell and the low pressure ejector inlet (238) so that, in the presence of a stream of fuel gas coming from the upstream part of the fuel feed duct (11A) and passing through the ejector (113), the ejector draws up off-gas from the recirculation duct and ejects it into the downstream part (11B) mixed with the stream of fuel gas coming from the upstream part; - a control circuit (15) and a valve (110) arranged in the upstream part (11A) of the fuel feed duct and arranged to be controlled by the control circuit, the valve being adapted to be placed in an open state, in which it lets the stream of fuel gas from the upstream part pass through the ejector (113), or in a closed state, in which no stream of gas from the upstream part can flow through the ejector. - characterized in that said control circuit (15) is arranged to place the valve alternately in the open state and then the closed state, so that the stream of fuel gas passing through the ejector (113) is intermittent, being frequency and/or pulse width modulated by the control circuit.
    • 燃料电池系统包括: - 至少一个燃料电池,其适于从燃料气体和氧化剂气体产生电能; - 燃料供给管道(11),其设置用于向所述燃料电池供应燃料气体,所述燃料供给管道包括上游部分(11A)和下游部分(11B); - 文丘里效应喷射器(113),包括高压入口(233),低压入口(238)和出口(240),燃料供给管道的上游部分连接到喷射器的高压入口, 所述下游部分在所述喷射器出口和所述燃料电池之间延伸; - 在燃料电池和低压喷射器入口(238)之间延伸的废气再循环管道(11R),使得在来自燃料供给管道(11A)的上游部分的燃料气流存在下,以及 通过喷射器(113),喷射器从再循环管道吸出废气,并将其喷射到与来自上游部分的燃料气流混合的下游部分(11B)中; - 控制电路(15)和配置在所述燃料供给管道的上游部分(11A)中并且被所述控制电路控制的阀门(110),所述阀门适于处于打开状态,其中 它使得来自上游部分的燃料气体流通过喷射器(113),或者处于关闭状态,其中来自上游部分的气体流不能流过喷射器。 其特征在于,所述控制电路(15)被布置成交替地将阀置于打开状态,然后关闭状态,使得通过喷射器(113)的燃料气体流是间歇的,是频率和/或脉冲 宽度由控制电路调制。