92-12: Alkaline Phosphate - A New Direction for Phosphate Cooling Water Thermal Performance

92-12: Alkaline Phosphate - A New Direction for Phosphate Cooling Water Thermal PerformanceStringent environmental restrictions on chromate, and now on zinc, are forcing many plants to investigate alternative cooling water treatment technologies. A newly developed alkaline phosphate program operates in the same pH region as current alkaline zinc technologies. The alkaline phosphate program has broad calcium (80 1200 ppm as CaaCO3) and "M" alkalinity (100 350 ppm as CaCO3) application ranges. The new program provides excellent mild steel and

Large induced draft cooling tower fans were used to reduce the total number of fans from 270 to 30

In dry mode

by preventing treatment program upsets

These factors combine to substantially lower costs and increase applicability of ice thermal energy storage systems

Change in corrosion rates and in the amount and type of suspected matter in the water was noted

Several methods are used to close the cooling loop

The alkaline phosphate program has broad calcium (80-1200 ppm as CaaCO3) and "M" alkalinity (100-350 ppm as CaCO3) application ranges

This code applies to mechanical and natural draft towers

This paper will examine the protocol to assess an existing galvanic corrosion protection system installed on the veil of a hyperbolic cooling tower

Information will be presented on the above issues

reduced corrosion

Legionella species and total heterotrophic aerobic bacteria