Open Loop Cooling Water Systems
From a water treatment perspective, the most critical and challenging portion of the system to treat with cooling tower water treatment chemicals is the Open Loop. Here water is cascaded over the cooling tower, providing for greater surface area that allows for air passing through the water via the tower fan to absorb heat from the water and exhaust it out of the tower. In the Open Loop, there are four significant problem areas: Scale, Corrosion, Fouling, and Microbiological Contaminants.
Common Problems Addressed
Scale
Because water is continually being lost by evaporation, fresh water has to be added. With this water come certain impurities – hardness, alkalinity, silica etc. which leads to scale formation.
Corrosion
Anytime water and metal come in contact, there is going to be corrosion. How well the water treatment professional minimizes that corrosion is a measure of the water treatment program's success.
Fouling
The effect of airborne contaminants (airborne dust, dirt) that are subjected to the system by movement of the air through the water and to a lesser degree by particles falling directly into the tower.
Microbiological Contaminants
A layer of dead or alive microbiological growths (algae, fungi, yeasts, molds, & bacteria) that can cause corrosion, lead to increased scaling, provide a means to trap foulant materials.
Open Loop Cooling Water Systems Solutions
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