| 摘要 |
PURPOSE: To provide a method and an apparatus for detecting water leakage in heating equipment wherein leakage of cooling water, etc., can be detected early even in a very small amount, and they are highly safe and secure. CONSTITUTION: A cooling water leakage detector tor an electric furnace 21 includes electromagnetic flow rate meters 23, 24, calculation means 27, detection means 28, and memory means 30. The electromagnetic flow rate meters 23, 24 detect flow rates of cooling water on outlet and inlet sides. The calculation means 27 calculates a cooling water leakage rate f, the mean value fv of the water leakage rate, and standard deviationσon the basis of the detection result. The detection means 28 detects based upon these calculation results occurrence of leakage of cool ing water when the cooling water leakage rate f is larger than an instantaneous reference value fa or when the mean value fv of the water leakage rates is larger than a monitor reference value fb and the standard deviationσis smaller than a standard deviation reference valueσ.
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