How is Water Loss Calculated in Cooling Tower?
Water loss in a cooling tower can happen due to evaporation, drift, and blowdown. Each of these components contributes to the overall water loss within the cooling tower, and their combined impact can be calculated to decide the whole water loss. Here’s how water loss is regularly calculated in a cooling tower:
Evaporation Loss:
- Evaporation is the essential instrument of water loss in a cooling tower, where water is converted into vapor and released into the climate. The rate of vanishing depends on components such as encompassing temperature, relative humidity, airflow, and water temperature.
- The evaporation loss can be calculated utilizing the taking after equation :
Evaporation Loss (L) = (Cycles of Concentration – 1) Ã Blowdown Rate
Where:
- Cycles of Concentration: The proportion of the concentration of dissolved solids within the recycling water to the concentration of broken down solids within the makeup water.
- Blowdown Rate: The rate at which a portion of the recycling water is released from the cooling tower to preserve the required concentration of dissolved solids.
Drift Loss:
- Drift is the entrainment of small water beads within the debilitate air released from the cooling tower. Drift loss speaks to the portion of water that’s carried out of the tower with the exhaust air.
- Drift loss is regularly communicated as a rate of the total circulating water flow rate or as a rate per unit of cooling capacity. The drift loss can be evaluated based on the plan of the cooling tower and its drift eliminator effectiveness.
Blowdown Loss:
- Blowdown is the intentional release of a portion of the recirculating water from the cooling tower to control the concentration of dissolved solids and anticipate scale and corrosion buildup.
- Blowdown loss can be calculated based on the specified cycles of concentration, makeup water quality, and evaporation rate. The blowdown rate is typically decided by water quality investigation and may be adjusted periodically to preserve optimal water chemistry.
Total Water Loss:
- The total water loss within the cooling tower is the whole of evaporation loss, drift loss, and blowdown loss. It can be calculated by including the commitments from each of these factors:
- Add up to Water Loss = Evaporation Loss + Drift Loss + Blowdown Misfortune
By calculating and monitoring water loss in a cooling tower, administrators can survey water utilization, oversee water treatment necessities, and optimize system execution whereas minimizing environmental impact and working costs. Regular maintenance and adjustments to working parameters can help minimize water loss and guarantee efficient cooling tower operation.
