Development of an Indirect Internal Reforming Molten Carbonate Fuel Cell Stack 929163

In 1991, the third Indirect Internal Reforming Molten Carbonate Fuel Cell Stack (IIR-MCFC) of 30kW nominal output power was built and tested. Some objects of this stack are to investigate a tall stack technology, temperature control in a stack performance, and so on. This stack is designated an unit stack for 100kW class stack which is scheduled to be operated in May, 1992. The 30kW stack consists of 62 cells, 10 reforming units, and 4864cm2 of effective cell area. This stack has been operated for over 2000 hours under continuous electric generating by the internal reforming of a fuel and has reached 35kW as a maximum electric power. In addition, 100kW IIR stack has been designed. It is composed of 2 stacks, one with 2 piled units. An each unit has 25kW nominal output power, and consists of 4864cm2 as an effective cell area, 48 cells, and 8 reforming units. Therefore, the total cell number is 192, and the total reforming unit number is 32.
This paper presents about the following items.
  1. (1)
    30kW IIR stack design
  2. (2)
    30kW IIR stack test results
  3. (3)
    100kW IIR stack design


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