1. What is Cooling Tower Evaporation Loss?

Cooling tower evaporation loss refers to the water lost from a cooling tower system due to evaporation during the heat rejection process. This is a natural consequence of the cooling mechanism where heat is transferred from the water to the air through evaporation.

2. How Does the Calculator Work?

The calculator uses the evaporation formula:

Where:

• \( Circulation\ Rate \) — Water flow rate through the cooling tower (m³/h)
• \( Range \) — Temperature difference between hot and cold water (°C)
• \( 0.001 \) — Empirical constant for evaporation calculation

Explanation: The formula calculates approximate evaporation loss based on the principle that evaporation is proportional to both the circulation rate and the temperature range across the cooling tower.

3. Importance of Evaporation Loss Calculation

Details: Accurate evaporation loss calculation is crucial for water management, chemical treatment dosing, makeup water requirements, and overall cooling tower efficiency optimization. It helps in proper system design and operational cost estimation.

4. Using the Calculator

Tips: Enter circulation rate in m³/h and range in °C. Both values must be positive numbers. The result shows evaporation loss in m³/h, which represents the amount of water lost due to evaporation per hour.

5. Frequently Asked Questions (FAQ)

Q1: Why is evaporation loss important in cooling towers?
A: Evaporation loss determines makeup water requirements, affects water treatment chemical consumption, and impacts overall system water balance and operating costs.

Q2: What factors affect evaporation rate besides circulation rate and range?
A: Ambient temperature, humidity, wind speed, cooling tower design, and water quality can also influence evaporation rates.

Q3: How accurate is this calculation method?
A: This provides an approximate estimation. For precise calculations, more detailed methods considering local climate conditions and tower characteristics may be needed.

Q4: What is the typical evaporation loss percentage?
A: Typically, evaporation loss accounts for about 1% of circulation rate for every 10°F (5.6°C) of cooling range, though this can vary.

Q5: How does evaporation loss relate to blowdown requirements?
A: Evaporation loss concentrates dissolved solids in the circulating water, which determines the required blowdown rate to maintain proper water chemistry.