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Cooling Tower Terminology or Cooling tower water parameter.

 Cooling Tower:

 

Terminology of Cooling Tower:

Below are the most important parameters of cooling tower which are affecting the cooling tower efficiency:-

  • Range
  • Approach
  • Wet Bulb temperature
  • COC (Cycle of Concentration)
  • Evaporation loss
  • Drift loss
  • Blow Down
  • Makeup water
  • TDC
  • Hardness

 

Range: Range is defined as the temperature difference between the cooling tower inlet temperature to the cooling tower outlet temperature. Range is also known as delta-T of cooling tower.

Approach: Approach is defined as the temperature difference between the temperature of the cooling water leaving the tower and the wet-bulb temperature of the air entering in cooling tower. Maintaining of the approach define the running temperature range of the cooling tower and approach is an crucial point in cooling tower.

Wet Bulb temperature of Cooling tower: Wet bulb temperature is a crucial factor withinside the cycles of cooling towers cooling process. Wet bulb temperature means  the minimum bottom temperature at which water can evaporate into the air till it`s saturated.

Cycle of Concentration: Cycle of concentration is the ratio of total dissolved solids available in feed water to the total dissolved solids available in circulation water which circulate through cooling tower. Cycle of concentration defines the how often we need to make-up the fresh water in cooling tower.

Evaporation loss: During the operation of cooling tower heat exchange done between hot water and air while small water particle generate and evaporate with air.

Drift Loss: Drift loss is defined as the water entrained withinside the air drift and released into the surrounding atmosphere. Drift loss does now no longer encompass water misplaced through evaporation. Pre-planned tower design can decrease the drift loss.

Blow Down: Blow down water define the water which need to drain at a fixed interval from cooling tower bottom to remove suspended particles are gathered at bottom of cooling tower. Blow down given to avoid the sudden increase in TDS and Hardness of cooling water.

Make-up Water: Fresh water need to add in cooling tower continuously to cover the water losses happened due evaporation, drift and blow down.

Evaporation Loss= 1.2% to 1.7% of the cooling water flow.

Drift Loss= 0.04% to 0.005% of the cooling water flow.

Blow Down= 0.3% to 0.5% of the cooling water flow.

Make-up water = Evaporation Loss+ Drift loss+ Blow Down.

 

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