| Cooling tower is one of the most important cold end equipments in power plant, and its operation performance concerns greatly economic and safety operation of unit. Based on three-variable method and enthalpy difference method, calculation model of cooling tower outlet water temperature and cooling performance is built in the paper. The results show that the difference between calculated value and measured value is very little, and also indicate the cooling performance can attain the design value. The factors, which concern the inlet and outlet water temperature of cooling tower, are analyzed from the view of cooling tower and condenser influencing each other. The results indicate the influence of all kinds of factors on inlet water temperature is greater than on outlet water temperature.
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