All cooling operations involving water have at least one thing in common: contamination, whether it’s from dirt, algae, corrosion, leaves, insects, sludge or other items. 

All cooling operations involving water have at least one thing in common: contamination, whether it’s from dirt, algae, corrosion, leaves, insects, sludge or other items. Five of the eight articles in this issue deal with some aspect of energy-draining, production-slowing contamination. It’s an ongoing battle worthy of your attention, so our editors have gathered these articles that may give you some new ideas.

Chiller efficiency is affected more by the cleanliness of the heat transfer surfaces than by any other factor. In a water-cooled tubular chiller, as contaminants accumulate on the tube surfaces, efficiency declines rapidly. Explore common cleaning methods in “Chiller Efficiency: The Tube Factor,” by Steve Spielmann, technical manager at Goodway Technologies Corp., Stamford, Conn.

An algae problem is pretty hard to miss, and while other microbiological problems might not be as obvious, they can be just as destructive to your process. An effective biofilm preventive maintenance program can help avoid thousands of dollars in lost productivity, equipment damage and maintenance costs. Tom Hall, vice president of sales and marketing at AmSolv, Waxahachie, Texas, explains in “Banishing Biofilm” how such a program works.

According to Jamie Overocker, VRTX Technologies’ marketing coordinator in Schertz, Texas, most of cooling tower water treatment in the United States is accomplished with biocides, dispersants and scale-inhibiting chemicals. However, regulations governing these chemicals are increasingly more stringent. As a result, nonchemical treatment has been evolving. In “Dynamic Water Treatment,” Overocker brings you up to date on nonchemical approaches such as kinetic energy, hydrodynamic cavitation and chemical equilibrium.

As you work at reducing contamination of your cooling water, you can bring down your water costs at the same time. Marcus N. Allhands, Ph.D., PE, vice president of business development for Orival Inc., Englewood, N.J., tells us in “Filtering Out Excess Water Costs” how the Philips Lighting plant in Danville, Ky., spent nearly a quarter of a million dollars a year on cooling water. The company installed automatic self-cleaning screen filters in the pump house to remove sediment and suspended solids from the detention pond near the plant’s offsite discharge and now benefits from big savings in cooling water costs - and a rapid return on investment.

In ”Clearing Away Cooling Clogs” Drew Robb, a freelance writer working with Los Angeles-based Automatic Filters Inc., discusses the advantages of automatic self-cleaning water filters to eliminate particulate problems, reduce maintenance requirements and improve cooling water quality.

In addition to tackling water-contamination issues, this month Process Cooling also gives you articles on using professionals to maintain your ammonia supplies, and reducing the energy that compressors like to suck up.

The NH3 Team Inc. in Delphos, Ohio writes “Handling Ammonia” to make readers aware of the benefits of using an outside firm of professionals to maintain ammonia refrigeration systems, rather than doing it in-house. Turning to an experienced ammonia-handling company can minimize safety risks and reduce maintenance costs.

Compressors are getting smarter and smarter, according to “Intelligent Compressors,” from Smartcool Systems Inc., Vancouver, British Columbia. Modern control technologies can reduce the electricity consumption and maximum demand by improving compressor performance and maintaining temperature control.

If you want to send one or more of these articles to a colleague, you don’t have to give up your copy of the magazine. Instead, simply visit, where you’ll find links to all of the feature articles in this issue and every other ever published. Click on the article headline, then in the upper right corner click on “Email to a Friend.”

Anne Armel,
Group Publisher,