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07-22: Variable Frequency Drives: Operation and Application with EvaporativeVariable Frequency Drives (VFDs) have become the preferred method of capacity control for evaporative cooling equipment, including cooling towers, fluid coolers, and evaporative condensers. By precisely matching fan motor speeds to the required building heat rejection, VFDs can significantly reduce energy consumption and operating costs of the entire system while providing operational benefits to the owner. This paper will explore the benefits of VFD

the ‘jump’ to the industrial market was logical

Oxidizing biocides have limited effectiveness in high pH environments while non-oxidizing biocides are expensive and hazardous

Operational data will be presented explaining how these stresses were managed using a comprehensive treatment

The Chocolate Bayou Plant is a world class chemical plant located in Alvin

detailing kinetics of film formation for various surface deposited film inhibitors not previously reported

During recent years

Differences from currently used coil-type wet/dry tower designs and benefit

Lime/soda ash softener function

Leachate from each one-inch throughfall simulant removed 3% of the drift mass from litter compared to 7 to 9% from live foliage

allowed comparison of product features and application variables on an equal basis

To understand this

It has become more necessary to control molybdate levels to optimize performance versus cost in corrosion inhibition