| 摘要 |
PROBLEM TO BE SOLVED: To find out a damage on a blade and the like in an early stage by calculating a compressor efficiency, calculating a reduced efficiency by a correction efficiency found out from a compressor inlet temperature in a rated condition and a correction efficiency found out from an inlet guide blade opening in the rated condition, and monitoring the reduced efficiency. SOLUTION: In an efficiency monitor of a compressor, a compressor efficiencyηreal is calculated from a compressor pressure ratio, a compressor delivery temperature, a compressor inlet temperature CTIM, and a specific heat ratio of an operating fluid. The compressor efficiency is reduced to a rated condition byηconv =ηreal -ΔηCTIM-ΔηIGVηconv is a reduced efficiency,ΔηCTIM is a correction efficiency by an IGV opening. In a monitor device, theηconv reduced in the rated condition is monitored, and it is judged that a moving blade of the compressor or a part of a stationary blade is broken when the value is reduced more than a setting value. It is thus possible to find out a damage on a blade and the like of a compressor automatically and precisely.
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