WATER TREATMENT FOR COOLING TOWERS

Chemical Water Treatment for Chilled Water Systems

Evaporative cooling systems/cooling towers are used to provide cooling for many applications such as manufacturing processes and air conditioning.

Water treatment is a general name given to a wide range of equipment and chemicals which are there to prevent problems and increase efficiency.

The main problems found in evaporative cooling systems are scale formation, corrosion and bacterial growth.

 

SCALE FORMATION – HOW DOES SCALE FORM?

The water coming into your site contains minerals. These minerals form a hard scale deposit when you heat the water – you will have seen this in the bottom of your kettle.

 

WHAT PROBLEMS DOES SCALE CAUSE?

scale in water pipeScale forms on the inside surfaces of pipes, heat exchangers and cooling towers causing a big reduction in heat transfer efficiency as the scale is thermally insulating. Flow rates are also reduced.

This means higher costs in energy for your system.

 

 

 

 

 

 

 

 

HOW DO YOU PREVENT SCALE FORMING?

Preventing scale from forming in the first place is of course the best strategy and its surprisingly simple – you install a water softener.

water softenerThese come in lots of shapes and sizes from small domestic units to huge industrial systems, but they all work in a fairly simple way. They are very reliable and cost effective.

 

 

 

 

 

 

 

 

 

 

CORROSIONcorroded pipe

Evaporative cooling systems – cooling towers, pipework and heat exchangers are made of steel and other metals. As they are in contact with water it’s not surprising that corrosion is going to happen – steel goes rusty very quickly. Metal surfaces can be protected with coatings and chemistry – adding corrosion inhibitors as well as controlling the pH (acidity) of the water can protect systems for many years.

 

 

 

BACTERIAL CONTAMINATION

Bacteria are naturally occurring in water systems and will multiply into very high numbers given the right conditions. This can present a heath hazard, particularly Legionnaires Disease, as well as causing slime build up in the system. Reduced flow rates, blockages and corrosion are all common problems. Bacterial levels can be controlled using the right combination of filtration, biocide chemicals and cleaning.

 

WATER TREAMENT

Water treatment for your evaporative cooling system is an investment which will maintain efficiency and prevent expensive problems. Done properly, it will save you far more than it costs in fuel, water, repairs and downtime.