Abstract
To effectively use the whole area in a stack for energy conversion, the formation of a uniform temperature gradient over the whole area in the stack is necessary. For the temperature gradient formation, a method to heat the intermediate positions in the stack with heaters is proposed. In this paper, the relation between the heating position of the stack and the quantity of the work flow generation is experimentally investigated. As a result, the work flow generation increased and the energy conversion efficiency improved due to the effect of heating the intermediate position in the stack. In addition, the work flow generation increases most significantly in the case where the whole area of the stack has a uniform temperature gradient. Therefore, it is assumed to be preferable for stack design that the temperature gradient is uniform over the whole area in the stack.
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