PURE WATER TANK OF FUEL CELL POWER GENERATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a pure water storage tank capable of preventing deformation, breakage and the like without increasing the thickness of a wall by reducing stress generated in the pure water tank when pure water is frozen.

SOLUTION: An antifreezing solution layer 16 is formed outside an inside surface wall 14 of a pure water layer 15 for storing pure water; and an antifreezing solution which has a solidification point lower than the lowest temperature of a use environment and in which the more the temperature drops, the more its density increases is stored in the solution tank 16. When it is assumed that the width of the solution layer 16 and the height of the solution layer 16 are D and H, respectively, D and H are so set as to satisfy D≥0.0005×loge×H+0.0037.

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