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69-05: Fan Noise Levels in Cooling TowersIn this discussion, the word "noise" will refer to any undesirable air borne sound, and "vibration" will apply to induced motion in mechanical components. We cannot always separate these two phenomena in our discussion, since mechanical vibration is usually a source of sound and is often part of a means by which sound is transmitted. If we make quantitative measurements, we recognize that noise instruments use microphones, detection motion of air,

coupled with the demands of increasingly stringent environmental and safety rules

The recommendations are applicable for Natural and Mechanical Draft cooling towers

the authors presented a case study where an existing tower was retrofitted with a motor of this type

Concern about aquatic toxicity of cooling water discharges has driven the development of biodegradable inhibitors for use in cooling water treatment

The velocity at design point and the change in velocity affect the steam duct design and the tube bundle design

Yet the short half-life of ozone coupled with the high ozone demands of cooling waters make it unreasonable to expect that any residual ozone will be present shortly after its application

Illustrations of the application of the technique and field application of the results are given

Revised September 2022

dissolved oxygen

This participation of soluble silica in the development of heat-resistant films occurred at circulating water silica contents below 75 ppm

In a typical cooling loop

This paper discusses some of these problems and their circumvention

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