Your cooling tower relies on water running through the system to carry out air conditioning effectively in a large commercial building. There are open recirculating, once-through, and closed recirculating water systems for cooling towers. A closed recirculating system is a better alternative compared to the others. In this system, most of the water is reused (avoiding wastage) and it is less exposed to contaminants. Regardless of the system that you opt for, you should treat the water chemically to optimise the efficiency of the cooling tower. Here are a few ways that chemical treatment optimises the efficiency:
Corrosion refers to an electrochemical process in which a metal turns back into its natural state as an oxide. Corrosion occurs because the water used in the cooling tower may contain salts, oxides and hydroxides that react with the metal used to make the cooling tower. Most cooling towers are made using steel because of its strength and durability. However, steel is susceptible to corrosion, which eats away the metal used to make the cooling tower. In the end, system failures can occur when the structure becomes too weak or starts to leak. By treating the water, you neutralise the salts and other chemical components, keeping them form wreaking havoc on the cooling tower.
Controls the Deposition of Scale
Basically, scale is a dense coating of inorganic material formed when water-soluble salts precipitate on surfaces that are in contact with that water. Examples of scale are calcium carbonate, magnesium silicate and calcium phosphate. Temperature changes in various sections of the cooling tower create a conducive environment for the formation of scale. They make some of the above compounds less soluble in the water, forcing them to be deposited in various sections of the cooling tower.
Scaling interferes with the insulation of the cooling tower and overworks the cooling tower by prolonging the time taken to cool the water. Treating the water removes the chemical compounds that cause scaling and keeps your cooling tower run efficiently.
The wet environment in the cooling tower is conducive for the growth and survival of micro plants. This include algae, protozoa, bacteria and fungi. You need to keep the growth of microorganisms in check because of they encourage scaling and temperature regulation of the water in the cooling tower. Thankfully, chemical treatment prevents their growth and ensures that your cooling tower operates at its optimal best.