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70-03: Trends in Thermal Pollution Control RequirementsThe guidelines of equal treatment for various beneficial uses would appear to be simple, but they generally have not been followed. When the water quality standards setting exercises began, the states tended to set standards that favored existing uses, and particularly industry. The propagation of fish and wildlife was a secondary factor. Today, the pendulum has swung completely in the other direction. One often gets the impression that the

There is currently no published test code that governs the performance testing of large wet cooling tower fans

The efficiency of the drift eliminator is governed by the channel orientation and geometry and by the air flow rate

In the large cooling systems like cooling towers and air-cooled steam condensers

Only counterflow towers will be discussed in this paper because of the ease in performing the calculations but the principles discussed also apply to crossflow towers

Aseptrol biocide feed rates

and indicate that significant economic advantages can be realized

The primary factors that must be considered

This paper describes the many points to consider beginning with selection of an optimum operating point and many factors concerning the fans operating environment

it is possible to lower fan power significantly

mechanical draft

Sensor mounting can significantly affect both overall vibration and FFT data

An ongoing interdisciplinary research project is investigating the effects of wind on the thermal performance of ACCs with a field study of an existing full-scale combined cycle power plant

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