11-10: AWT’s ASHRAE Liaison Report: NCDs and Biological Control in Cooling Testing

11-10: AWT’s ASHRAE Liaison Report: NCDs and Biological Control in Cooling TestingAWTs (ASHRAE) Liaison Report presents and summarizes the recent ASHRAE research project, 1361 RP, on biological control in cooling water systems using non chemical treatment devices. The report presents the result of ASHRAEs controlled, independent, and scientific evaluation of several classes on non chemical treatment devices (NCDs) for efficacy in reducing planktonic (bulk water) and sessile (Biofilm) microbial populations within a pilot scale

An important distinction between drift and the normally visible condensing plume is that the drift contains the same chemicals and solids present in the circulating water

the filter operational reliability is high and the operation and maintenance costs are extremely low

highly variable make-up water chemistry

This was a unique test

fungi and biofilms in industrial water systems

The benefits of proper control are measurable and translate to improved system efficiency and reliability

These waters often contain impurities that serve as nutrients for microbiological fouling in cooling systems

This paper identifies cooling tower operating practices that may create increased piping loads and provides deep considerations that can help prevent catastrophic pipe failures

This paper addresses a solution to this problem encompassing initial ideas

especially considering the technological advances in VFD's during the last two decades

lower weight and corrosion resistance

cooling tower manufacturer