| 摘要 |
PURPOSE:To decrease the capacity of an air compressor in a system and power used by supplying part of air in an air line to a cathode circulation line through a circulation blower bearing. CONSTITUTION:Pressure of a cathode gas 3 circulating with a circulation blower 23 is 1-20kg/cm<2>, and the pressure of an air line 14 is also the same level as the cathode gas pressure. The air pressure is slightly increased than the pressure in the blower 23 to supply cooling air from the air line 14. The air used to cool the bearing of the blower 23 is mixed with the cathode gas 3, and the gas 23 mixed with the air is supplied to a cathode. The capacity of a compressor in a system is almost halved, the compact compressor is realized, and the power for the compressor is decreased half or less. Since the amount of air supplied to cool the bearing of the blower 23 is increased, the load of the compressor in the air line 14 is increased. Increase in output caused by increase in the air amount is small compared with the total output of the compressor, and increase in the output is smaller than decrease in the output of the compressor, and efficiency of the whole system is enhanced. |
