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11-10: AWT’s ASHRAE Liaison Report: NCDs and Biological Control in CoolingAWTs (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

which has historically been used to relate the sensible and evaporative transfers

and that also helps remove slime/biofilm form surfaces

This standard sets forth the minimum retentions and penetrations to be obtained

These limits place an impact on the type of water treatment used in the majority of cooling-tower water systems

Traditional methods to eliminate the plume employ a hybrid technology of air-cooled steel coils in tandem with the evaporative section of the cooling tower

nozzle assemblies

to condense turbine exhaust steam from the steam cycle of combined cycle plants

Life expectancy predictions of wood cooling towers are accomplished with the aid of nondestructive and/or destructive testing of representative samples of structural members and their connections

they also must manage their operating risks

there is considerable opportunity to reduce fan energy costs the remaining 98% to 99% of the year

This paper documents work conducted by CleanAir and the associated findings

High cycle operation

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