1. What is Evaporation Rate?

The evaporation rate is the amount of liquid that evaporates from a surface per unit time. It's a crucial parameter in various fields including meteorology, chemical engineering, and environmental science.

2. How Does the Calculator Work?

The calculator uses the evaporation rate formula:

Where:

• \( V \) — Wind speed (meters per second)
• \( SA \) — Surface area (square meters)
• \( X_s \) — Saturation humidity ratio (kg/kg)
• \( X \) — Actual humidity ratio (kg/kg)

Explanation: The formula accounts for wind speed effects (25 + 19V), surface area, and the humidity difference driving the evaporation process.

3. Importance of Evaporation Rate Calculation

Details: Accurate evaporation rate calculation is essential for water resource management, industrial processes, climate modeling, and agricultural planning.

4. Using the Calculator

Tips: Enter wind speed in m/s, surface area in m², and humidity ratios in kg/kg. Ensure Xₛ > X for meaningful results. All values must be positive.

5. Frequently Asked Questions (FAQ)

Q1: What factors affect evaporation rate?
A: Temperature, humidity, wind speed, surface area, and atmospheric pressure are key factors influencing evaporation rates.

Q2: What are typical evaporation rates?
A: Rates vary widely from 0.1-10 kg/m²/hour depending on conditions. Swimming pools typically lose 2-5 mm/day.

Q3: How is humidity ratio different from relative humidity?
A: Humidity ratio is the mass of water vapor per mass of dry air (kg/kg), while relative humidity is the percentage of moisture relative to saturation.

Q4: When is this formula most accurate?
A: The formula works well for water evaporation under normal atmospheric conditions. Accuracy decreases for other liquids or extreme conditions.

Q5: Can this be used for industrial applications?
A: Yes, it's commonly used in cooling towers, drying processes, and environmental impact assessments.