Cooling tower chemical treatment involves adding specialized biocides, corrosion inhibitors, and scale preventatives to recirculating cooling water to maintain system efficiency and water quality. These chemicals protect metal components, prevent microbial growth, and inhibit mineral scale formation that can reduce heat transfer effectiveness by up to 40%.
Treatment Components
Standard programs include oxidizing biocides (chlorine or bromine), non-oxidizing biocides, corrosion inhibitors typically containing molybdenum or zinc, and chelating agents. Water testing occurs weekly or bi-weekly to monitor pH (6.8-7.6), alkalinity (80-120 ppm), and cycles of concentration (2-4 times). ASHRAE 188 guidelines recommend testing for Legionella quarterly.
System Protection
Proper chemical treatment extends cooling tower lifespan to 15-20 years and prevents costly downtime from biofilm formation or corrosion. Neglected systems experience reduced efficiency, increased energy consumption, and potential health hazards from microbial contamination.