| 摘要 |
PURPOSE:To increase compression efficiency of a compressor at a low cost by installing a plurality of compressing mechanisms which compress oxidizing agent, and arranging a cooling unit which cools compressed oxidizing agent by heat exchange with fuel between compressing mechanisms. CONSTITUTION:Low pressure side compressing mechanism 21 and high pressure side compressing mechanism 22 each comprising an exhaust gas turbine and a compressor are installed in order to supply compressed oxidizing agent to a positive electrode gas space of a fuel cell of fuel cell power generating plant. A cooling unit 23 which passes fuel a to a fuel treatment unit 10 from a fuel supply source A through a secondary coil 23a to cool high temperature, high pressure compressed air d is arranged between compressing mechanisms 21A, 22A. By compressing again cooled compressed air, the second step compression is effectively performed to increase compression efficiency. Decrease in controllability caused by use of large compressor is eliminated and compressed air having high compression rate can be obtained at a low cost. |
