| 摘要 |
PURPOSE:To effectively recover low temperature heat generated in a fuel cell by adding heat energy to a gaseous component obtained by utilizing low temperature heat produced in a fuel cell facility and heat of exhaust gas from an expansion turbine, to be utilized as a power source for another expansion turbine. CONSTITUTION:A part of pressurized air to be supplied from an air compressor 3 to a fuel cell unit 1 is branched to passages 12-16, to be fed to heat exchangers 17-21 to atomize pressurized water. Meanwhile, exhaust heat (Q1+Q2) is supplied from the fuel cell unit 1 to the heat exchangers 17, 18 via the passages 12, 13. Mixture fluid composed of air, water and steam in the heat exchangers 17-21 is supplied to an air-liquid separator 25, where a gaseous component (air and steam) is separated from water. Exhaust from an expansion turbine 9 is mixed with gas discharged from the heat exchanger 29, to be supplied to a combustor 7 together with the gaseous component from the air-liquid separator 25, and then, supplys heat energy, which is utilized in another expansion turbine 10. Consequently, low temperature heat generated in the fuel cell unit 1 can be effectively recovered. |
