1. What is Indoor Swimming Pool Evaporation?

Indoor swimming pool evaporation refers to the process where water molecules transition from liquid to vapor state due to environmental conditions. Understanding evaporation rates is crucial for proper pool maintenance, humidity control, and energy management in indoor pool facilities.

2. How Does the Calculator Work?

The calculator uses the evaporation formula:

Where:

• \( SA \) — Surface area of the pool (square feet)
• \( V \) — Air velocity above the pool surface (meters per second)
• \( Xs \) — Saturation humidity ratio at water temperature (kg/kg)
• \( X \) — Ambient humidity ratio (kg/kg)

Explanation: The formula calculates evaporation rate based on pool surface area, air movement, and the difference between saturation and ambient humidity levels, converting the result to gallons per day.

3. Importance of Evaporation Calculation

Details: Accurate evaporation rate calculation helps in designing proper ventilation systems, determining water replacement needs, managing humidity levels, and optimizing energy consumption for pool heating and dehumidification.

4. Using the Calculator

Tips: Enter pool surface area in square feet, air velocity in m/s, and humidity ratios in kg/kg. Ensure all values are positive and humidity difference (Xs - X) is valid for accurate results.

5. Frequently Asked Questions (FAQ)

Q1: Why is evaporation higher in indoor pools?
A: Indoor pools typically have warmer water temperatures and controlled environments that can create significant humidity differentials, leading to higher evaporation rates compared to outdoor pools.

Q2: How does air velocity affect evaporation?
A: Higher air velocity increases evaporation by removing saturated air from the pool surface and replacing it with drier air, enhancing the evaporation process.

Q3: What are typical evaporation rates for indoor pools?
A: Rates vary but typically range from 0.1-0.3 gallons per square foot per day, depending on temperature, humidity, and air movement conditions.

Q4: How can evaporation be reduced?
A: Using pool covers, maintaining proper humidity levels, reducing water temperature, and controlling air movement can significantly reduce evaporation rates.

Q5: Why convert to gallons per day?
A: Gallons per day is a practical unit for pool maintenance, water treatment, and replenishment planning in the swimming pool industry.