Separator, fuel cell device, and temperature control method for fuel cell device

摘要

Separator, fuel cell device and temperature control method for fuel cell device are provided. The sectional areas S₁ to S₄ of thermal radiation fins are determined by the magnitude of the widths w₁ to w₄, since the thermal radiation fins have the same thickness t. The thermal radiation fins are provided in the condition where the widths w₁ to w₄ of the thermal radiation fins are so regulated that the sectional area S₁ of the thermal radiation fin is the smallest and that the sectional areas S₂, S₃ and S₄ are reduced in this order. In other words, the quantities of heat radiated are regulated according to the sectional areas S₁ to S₄ of the thermal radiation fins and it is possible to reduce the temperature gradient in a power generation unit with respect to the lamination direction, and to keep substantially uniform the temperature of the power generation unit. This makes it possible, in a power generation unit having a stack structure, to suppress dispersions in the temperature of the power generation unit along the lamination direction of power generation bodies and separators, and to keep uniform the temperature of the power generation unit.