| 摘要 |
PROBLEM TO BE SOLVED: To accurately diagnose foul on a heat transfer tube of a cooling water system in a degradation diagnosis system of a heat source instrument, and to provide an efficient operation form. SOLUTION: The fouling factor, in-tube heat transfer rate, or heat transmission coefficient of the heat transfer tube is calculated based on measured data in an operation and instrument data of the heat source machine, and the diagnosis is performed with a trend with time. By determining the fouling factor based on an ideal in-tube heat transfer rate and an actually measured in-tube heat transfer rate determined from the measured flow rate of the cooling water, the diagnostic accuracy is improved and it can be also applied to a cooling water variable flow rate system. A diagnosing device is connected to a plurality of heat source machines having a data recording section via an information communication network. COPYRIGHT: (C)2006,JPO&NCIPI
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