Cooling Tower Water Treatment

A cooling tower is built to cool down cooling water with air. The system works with surface enlargement. An open cooling tower is part of an open cooling water system. The warm cooling water coming back from the consumers, is pumped into the upper part of the tower, flows to the bottom and fed back into the cooling system. In this process a part of the water evaporates which cools down the water.

Despite all classical cooling tower water treatment, there often occur limescale, corrosion and algae growth. The pictures below show what this might look like.


Cooling tower water treatment using Merus Ring

Apart from heat exchangers, are cooling towers our most important application. The success of the installation is independent from size of the cooling tower. We have achieved excellent results in small, medium and big cooling systems. Even if several big cooling towers are connected in one loop our technology works secure and reliably.

We install Merus Rings to prevent algae growth, corrosion and scaling. Especially in warmer areas of the world you have to react fast to prevent biofouling in the whole system – starting with algae in one spot in the cooling tower.

Often the Merus Rings are the only water treatment needed even in big, complex cooling systems and the connected heat exchangers. On big systems, doing only cooling tower water treatment is not enough. Merus has to install rings at several positions in such a system.

Saving water in the cooling tower

The consumption of cooling water is affected by three major factors: evaporation, quality of the feeding water and frequency of blow-downs. With the Merus Ring we have influence on the third factor. As the solubility of salts (also limescale) in the water is increased more salt is solved in the water instead of settling in the pipe. Therefore the cooling system can work with a higher concentration of salt in the water. There are less blow-downs necessary and water is saved. Usually about 25% less water is needed. In some cases we save about 50% if the feeding water is of very bad quality.