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Untangling the complexities of cooling water chemistry Concerns over freshwater consumption have spurred changes in powerplant cooling technologies--some mandated by new laws. As a result, plant operators have had to substantially modify their chemical treatment programs for cooling water

Unless equipped with an air-cooled condenser, all steam plants have to deal with chemical treatment of the cooling water. The goals of a cooling water treatment program are the prevention of corrosion and deposits--the same as they are for chemical treatment of the steam side. However, that's where the similarities end, and the complications begin.

For starters, the causes of corrosion and deposits in a cooling system can be a combination of biological and inorganic forces, whose interactions are not always clear-cut. Another complication is that the treatments to counteract each of these problems can be at odds with one another; so what fixes one problem can create another. Furthermore, ...

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