| 摘要 |
PROBLEM TO BE SOLVED: To prevent frequent repetition of operation and stop of an axial flow blower even for any required thermal load of a steam condensing device. SOLUTION: In a method for controlling degree of vacuum of the air cooling type steam condensing device provided in a steam turbine plant, actual degree of vacuum detected by the air cooling type steam condensing device exceeds one of an upper limit value or a lower limit value established for a target degree of vacuum after predetermined number of the axial flow blowers of the plurality of the axial flow blowers are operated in sequence, difference between the actual degree of vacuum and the upper limit value or the lower limit value is integrated, the integrated value is compared with operation set value set separately, and next axial flow blower is additionally operated or stopped only when the integrated value exceeds the operation set value. COPYRIGHT: (C)2005,JPO&NCIPI
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