1. What is the Indoor Pool Evaporation Rate?

The indoor pool evaporation rate calculates the amount of water lost from a swimming pool due to evaporation. This is important for maintaining proper water levels, controlling humidity, and managing water treatment costs in indoor pool facilities.

2. How Does the Calculator Work?

The calculator uses the evaporation rate 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)
• 7.48 — Conversion factor to gallons
• 3600 — Seconds to hours conversion

Explanation: The formula accounts for pool surface area, air movement, and the humidity difference between saturated air at pool temperature and ambient air conditions.

3. Importance of Evaporation Rate Calculation

Details: Calculating evaporation rates helps in proper HVAC sizing, humidity control, water conservation planning, and chemical treatment scheduling for indoor pools.

4. Using the Calculator

Tips: Enter pool surface area in square feet, air velocity in m/s, and humidity ratios in kg/kg. Ensure Xs > X for valid results. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What factors affect pool evaporation rates?
A: Key factors include water temperature, air temperature, humidity, air movement, pool activity, and pool surface area.

Q2: How can I reduce evaporation in my indoor pool?
A: Use pool covers when not in use, maintain proper humidity levels (50-60%), control air movement, and keep water temperature reasonable.

Q3: What are typical evaporation rates for indoor pools?
A: Typically 0.1-0.3 inches per day, but varies significantly based on environmental conditions and pool usage.

Q4: Why is humidity ratio used instead of relative humidity?
A: Humidity ratio (absolute humidity) provides more accurate calculations for evaporation as it's not temperature-dependent like relative humidity.

Q5: 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.