Solid-oxide fuel cell assembly having a convectively vented structural enclosure
    1.
    发明授权
    Solid-oxide fuel cell assembly having a convectively vented structural enclosure 有权
    具有对流排气结构外壳的固体氧化物燃料电池组件

    公开(公告)号:US07537849B2

    公开(公告)日:2009-05-26

    申请号:US10238093

    申请日:2002-09-10

    摘要: In a solid-oxide fuel cell system, the fuel cell stacks, the fuel reformer, tail gas combuster, heat exchangers, and fuel/air manifold, are contained in a “hot zone” within a thermal enclosure. A separate and larger structural enclosure surrounds the thermal enclosure, defining a “cool zone” outside the thermal enclosure for incorporation of “cool” components such as the air supply system and the electronic control system. To prevent unwanted temperature rise in the cool zone during shutdown, from residual heat escaping from the hot zone through the thermal enclosure, the structural enclosure is provided with vents through the lower and upper walls thereof to permit thermal convective circulation of air through the enclosure. The vents are baffled to prevent entry of splash and other contaminants, and the lower vent is provided with a float valve to prevent flooding of the enclosure in event of immersion of the SOFC system.

    摘要翻译: 在固体氧化物燃料电池系统中,燃料电池堆,燃料重整器,尾气燃烧器,热交换器和燃料/空气歧管被包含在热封壳内的“热区”中。 一个单独的和较大的结构外壳围绕热封闭,在热封壳外面形成一个“冷却区”,用于结合诸如供气系统和电子控制系统之类的“冷”组件。 为了防止在关闭期间冷却区中的不必要的温度升高,从残留的热量从热区域通过热外壳逸出,结构外壳通过其下壁和上壁设有通风口,以允许空气通过外壳的热对流循环。 通风口被阻挡以防止飞溅物和其他污染物的进入,并且下部通风口设置有浮阀,以防止在SOFC系统浸没的情况下外壳的淹水。

    Oxygen getters for anode protection in a solid-oxide fuel cell stack
    5.
    发明授权
    Oxygen getters for anode protection in a solid-oxide fuel cell stack 有权
    在固体氧化物燃料电池堆中用于阳极保护的氧气吸气剂

    公开(公告)号:US07435490B2

    公开(公告)日:2008-10-14

    申请号:US11593672

    申请日:2006-11-07

    摘要: In a fuel cell assembly, nickel-based anodes are readily oxidized when exposed to oxygen as may happen through atmospheric invasion of the assembly during cool-down following shutdown of the assembly. Repeated anode oxidation and reduction can be destructive of the anodes, leading to cracking and failure. To prevent such oxygen migration, oxygen getter devices containing oxygen-gettering material such as metallic nickel are provided in the fuel passageways leading to and from the anodes. Oxidation of the oxygen-gettering material is readily reversed through reduction by fuel when the assembly is restarted.

    摘要翻译: 在燃料电池组件中,当暴露于氧气时,镍基阳极容易氧化,这可能是由于在组件关闭后的冷却期间通过组件的大气侵入而发生的。 重复的阳极氧化和还原可能是阳极的破坏,导致开裂和破坏。 为了防止这种氧迁移,在通向和从阳极的燃料通道中提供含有吸氧材料如金属镍的吸氧剂装置。 当组装重新启动时,吸氧材料的氧化很容易通过燃料的还原反转。

    Fuel distribution system for a fuel cell stack
    7.
    发明授权
    Fuel distribution system for a fuel cell stack 失效
    用于燃料电池堆的燃料分配系统

    公开(公告)号:US06893768B2

    公开(公告)日:2005-05-17

    申请号:US10133600

    申请日:2002-04-26

    IPC分类号: H01M8/02 H01M8/04 H01M8/24

    摘要: An improved system for more uniformly distributing gaseous fuel over the anode surface of a fuel cell, comprising an interconnect subassembly for electrically connecting anodes and cathodes of adjacent fuel cells in a fuel cell stack. The subassembly includes a perforated plate disposed adjacent the anode surface. The plate may be parallel to or inclined to the anode surface and forms a first wall of a fuel plenum for uniformly distributing fuel via the perforations over the entire surface of the anode. The second wall of the plenum is a plate separating the fuel flow from air flowing across the cathode. Electrical continuity across the interconnect subassembly may be provided, for example, by non-planar upsets such as bumps and dimples in the two plenum plate components, or by metallic foam or filaments disposed between the plates and the electrodes.

    摘要翻译: 一种用于在燃料电池的阳极表面上更均匀地分配气体燃料的改进系统,包括用于电连接燃料电池堆中的相邻燃料电池的阳极和阴极的互连子组件。 子组件包括邻近阳极表面设置的多孔板。 板可以平行于或倾斜于阳极表面,并且形成燃料增压室的第一壁,用于通过穿孔在燃料的整个表面上均匀地分配燃料。 增压室的第二壁是将燃料流与横过阴极的空气分开的板。 互连子组件之间的电连续性可以例如通过诸如两个增压板组件中的凸起和凹坑的非平面凹陷或者设置在板和电极之间的金属泡沫或细丝提供。

    Method of thermally-stabilizing an oxygen transport membrane-based reforming system

    公开(公告)号:US10118823B2

    公开(公告)日:2018-11-06

    申请号:US14969486

    申请日:2015-12-15

    IPC分类号: C01B3/38 C01B13/02

    摘要: A method of operating an oxygen transport membrane based reforming system employing one or more packs of thermally coupled panels of reformer tubes and oxygen transport membrane (“OTM”) reactors close to thermo-neutral point is provided. The method produces syngas by converting a hydrocarbon-containing feed, such as natural gas in the reformer tubes of a pack by endothermic steam reforming reactions. The heat required for endothermic reforming reactions is provided by exothermic oxidizing reactions occurring inside the OTM reactors of the pack. At a thermo-neutral point the heat released by exothermic reactions matches the heat required to support endothermic reactions and heat losses in the pack. The method modulates the flow rate of hydrocarbon-containing feed and/or steam-to-carbon ratio of the combined feed to the pack to maintain the surface temperature of oxygen transport membrane reactors below a target maximum temperature. The syngas product oxygen-to-carbon ratio is maintained within a desired target range such that the OTM based reforming system is operated close to thermo-neutral point.