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What are Cooling Towers and how do they Work?

October 20, 2016, Author: Tru Motor News

Cooling TowerHot summers are a problem in many countries, including Australia, in that many establishments have to force their air conditioners to work double time, leading to increases in energy usage and on the workload of the cooling system.

One of the most cost-effective ways to cool down a sizeable area is the use of cooling towers.

What is a cooling tower?

A cooling tower is a device for the rejection of heat. It is effective because it extracts waste heat and releases it to the atmosphere. The cooling tower does this by cooling a water stream to a lower temperature.

A small portion of the cooled water is allowed to evaporate into a moving air stream; this why the heat rejection type of a cooling tower is called ‘evaporative’. With this effect, the cooling tower enables significant cooling of the unevaporated water stream. Following the release of heat from the water through the air stream, the temperature and relative humidity of the air goes up to 100%. This hot air is then discharged to the atmosphere.

Cooling towers are not only for air-conditioning; they have an excellent cooling ability for industries in the electric power generation and manufacturing. Water-cooled heat rejection devices work better than air-cooled or dry counterparts.

Keeping Water-Cooled air Clean

To keep the air from cooling towers clean, a side stream filtration system like one from Masterflow Solutions is applied. Cooling towers remove microbiological organisms, dust and other debris in the air. The filtration system’s job is to:

  • Make the system more efficient
  • Reduce the speed of corrosion
  • Extend the life of the equipment
  • Reduce the cost of maintenance
  • Control chemicals more efficiently

There are reasons this filtration system is important. For example, if the plant that uses the cooling towers gets water from an unclarified source such as a river. It may also reduce a requirement for frequent cleaning.