WATER-COOLED FUEL CELL POWER GENERATING APPARATUS

PROBLEM TO BE SOLVED: To provide a water-cooled fuel cell power generating apparatus in which microbe propagation can be prevented without requiring complicated maintenance work such as washing of a produced water recovering system and a water treating system with chemicals. SOLUTION: A fuel cell 1 consisting of layered bodies of a plurality of unit cells and cooling plates 3 is provided with a cooling water circulating system 10 to circulate cooling water 6 to cooling pipes in the cooling plates, a produced water recovering system 20 which condenses steam in waste gases 7, 8 of the fuel cell and a fuel reforming apparatus 2 to recover as water, mixes the water with tap water to give mixed water 26, and store the mixed water 26, and a water treating system 30 which converts the mixed water into pure water 26P and supplies to the cooling water circulating system 10. An ultraviolet sterilization apparatus 41 to sterilize microbes in the mixed water 26 by irradiation of ultraviolet rays is installed in a mixed water flowing route, or the ultraviolet sterilization apparatus 41 and an antibacterial filter 42 are installed at mutually different positions in the mixed water flowing route.