- A cooling tower is a powerful heat exchanger that regulates temperature in a number of industrial processes.
- The major concerns for all users of water with the purpose of thermal transfer are: Cost Effectiveness of Water Treatment, Energy Savings, Water Savings, and Environmentally Safe
How Water Circulates In Cooling Towers?
- A cooling tower loses water through evaporation (to achieve cooling) and through drift (water droplets carried away by wind and fan). Thus water has to be added to compensate for the loss.
- Since all cooling water contains dissolved solids, unless previously removed, the evaporation will concentrate these dissolved solids in the cooling systems.
- High concentrations will result in scale formation in the heat exchanger and in the tower.
Hard Water Problems In Cooling Towers
- Engineers in hard water areas know the problems caused by scale in water systems: increased maintenance, unplanned shutdowns, premature replacement of equipment and higher energy costs.
- Thin layers of scale can form in a cooling tower’s tubes, increasing the thermal resistance of the heat exchanger and subsequently dramatically increasing the energy costs.
- The thermal conductivity of calcium carbonate is 4,000 times smaller than that of copper and therefore even the thinnest coating acts as an effective heat insulator.
- Buildings that feature cooling towers must keep track of and control the four major types of water treatment issues. These are scaling, corrosion, biological contamination, fouling.
- The traditional approach to de-scaling and scale prevention has been the continuous use of costly chemicals, or acid treatment and the manual removal of scale deposits.
- The most practiced system to avoid scaling inside pipes is to treat the water by Ion-Exchange where normal salts have to be changed on regular basis.
- The disadvantages of such a system are: It discharges water which pollutes the environment.
- The plant has to be continuously monitored.
- Routine maintenance for replenishing the salts.
- The pipes can corrode over the years from sodium deposits.
- Costly maintenance
- UB’CAL’s mission is to provide an effective, ecological and economical way in obtaining the sustainability goals.
- UB’CAL provides an innovative and chemical-free alternative to conventional water treatment. Compared to conventional water treatment, UB’CAL offers substantial savings in operating costs
By “going green” at the same time, huge savings will be realized with regards to chemicals, energy and water usage
- Removes existing scale & prevents new scale formation
- Algae, Biofilm, Fungi & other microorganisms are virtually eliminated
- Increase cycles of concentration to 6 or more-significantly reducing “bleed off”
- Water clarity improves
- Bacteria counts reduced
- Reduced corrosion & pitting from bacteria
- Greatly reduce or eliminate chemical usage
- Reduce overall cooling tower maintenance expenses
- Eliminates scale and Biofilm as a breeding ground for harmful bacteria – including Legionnaire’s Disease
- Eliminate fouling of the chiller
- In chemical costs alone, the savings are substantial. Chlorine, biocides, acids & phosphates & similar compounds may be eliminated.
- Chemical storage, regulation and compliance issues.
- Huge energy saving s from improved heat transfer as result of scale and Biofilm elimination
- Huge savings in water usage and disposal fees
- Extends life of capital equipment