Solid oxide electrolysis cell system and a method of operating a solid oxide electrolysis cell system

    公开(公告)号:US12091762B2

    公开(公告)日:2024-09-17

    申请号:US17391621

    申请日:2021-08-02

    摘要: A method of operating a solid oxide electrolysis cell (SOEC) system at partial load, where the SOEC system includes a plurality of branches electrically connected in parallel, and each branch includes at least one SOEC stack. The method includes determining a thermally neutral target voltage below which operation is endothermic and above which operation is exothermic; and executing pulse width modulation current control by cycling an ON phase and an OFF phase for each branch such that the SOEC system operates at an average operating power equal to a chosen percentage of the operating power at the thermally neutral target voltage. In the ON phase, all of the SOEC stacks in a branch operate at the thermally neutral target voltage, and in the OFF phase, all of the SOEC stacks in the branch operate at 0% power. Each branch is configured to be operated independently of the other branches.

    Solid oxide fuel cell system with carbon capture and increased efficiency

    公开(公告)号:US12095127B2

    公开(公告)日:2024-09-17

    申请号:US17541575

    申请日:2021-12-03

    IPC分类号: H01M8/04 H01M8/0668 H01M8/12

    CPC分类号: H01M8/0668 H01M2008/1293

    摘要: A fuel cell system includes a fuel cell module having an inlet and an outlet. The fuel cell module receives a fuel stream including gaseous fuel and expels a depleted fuel stream. The system also includes an exhaust processing module disposed relative to the fuel cell module such that waste heat from the fuel cell module is usable by the exhaust processing module. The system is configured to direct a first portion of the depleted fuel stream to the exhaust processing module, where the depleted fuel stream includes depleted fuel and at least one gaseous byproduct including oxygen and carbon dioxide. The exhaust processing module subjects the first portion of the depleted fuel stream to co-electrolysis using the waste heat from the fuel cell module to produce a fuel-enriched stream. The system is configured to direct the fuel-enriched stream to the inlet of the fuel cell module.

    FUEL CELL SYSTEM INCLUDING EJECTOR
    5.
    发明公开

    公开(公告)号:US20230178763A1

    公开(公告)日:2023-06-08

    申请号:US18071914

    申请日:2022-11-30

    摘要: A fuel cell system including a fuel cell module comprising an anode section configured to output an anode exhaust stream, a first junction configured to split the anode exhaust stream into an anode recycle stream and a system outlet stream, and an ejector. The ejector comprises a low pressure inlet configured to receive a suction stream comprising a first portion of the anode recycle stream, a motive inlet configured to receive a motive stream comprising a second portion of the anode recycle stream, and an outlet configured to output an ejector output stream. The anode section is configured to receive an anode input stream that comprises the ejector output stream.

    Selectively rotated flow field for thermal management in a fuel cell stack

    公开(公告)号:US11335919B2

    公开(公告)日:2022-05-17

    申请号:US16721393

    申请日:2019-12-19

    摘要: An electrochemical cell stack comprises a plurality of electrochemical cell units, each comprising a cathode, an anode, and an electrolyte, and also comprises a plurality of interconnects. An interconnect is disposed between adjacent electrochemical cell units and defines a longitudinal channel having circumferential corrugations defined therearound. A fuel channel is defined between each anode and a respective adjacent interconnect, the fuel channel having fuel inlet and outlet. An oxidant channel is defined between each cathode and a respective adjacent interconnect, the oxidant channel having an oxidant inlet and outlet. The plurality of electrochemical cell units and interconnects include a first electrochemical cell unit, a first interconnect adjacent the first electrochemical cell unit, a second electrochemical cell unit adjacent the first interconnect, and a second interconnect adjacent the second electrochemical cell unit. The second interconnect is rotationally offset from the first interconnect about a longitudinal axis of the fuel cell stack.