Alternatives to Chlorine for Cleaning Cooling Towers

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Courtesy of Dolphin WaterCare

Untitled Document

Summary

The new amendments to ASHRAE Standard 62-2001, Ventilation for Acceptable Indoor Air Quality, require a minium separation distance between cooling towers and outdoor air intakes or doors and windows that are a part of a natural ventilation design. However this minimum distance does not necessarily provide protection to building occupants from exposure to cooling tower contaminants. These contaminants may be either bacteria from an infection in the cooling tower sump or cleaning chemicals, generally chlorine, intended to protect against an infection. It has been our experience that attempting to provide such protection by adequate dilution of the cooling tower exhaust before entering an air intake is difficult, if not impossible. A better approach appears to be the use of alternatives to chlorine for maintaining cooling tower health.

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