Evaporation Rate (Water) Calculator

To calculate the water evaporation rate, input variables like wind speed, surface area, and temperature difference into the formula to determine the volume of water evaporated over a specific period.

The Evaporation Rate (Water) Calculator is an essential tool for determining how quickly water evaporates under various conditions, such as wind speed, temperature, and humidity. This calculator is highly useful for applications like swimming pool water management, cooling tower efficiency, or hot water evaporation rate analysis. It also helps in scientific studies, where understanding water evaporation rates by temperature or per square meter is critical. Whether you are maintaining a swimming pool or assessing industrial evaporation systems, this tool simplifies the calculations with accuracy and convenience.

Formula:

Contents

1 Formula:
2 Variables:
3 Solved Calculations:
4

$gh = (25 + 19 \cdot v) \cdot (A) \cdot (X_s – X)$

Variables:

Variable	Description	Unit
$gh$	Evaporation rate	Kilograms per hour (kg/hr)
$v$	Wind speed	Meters per second (m/s)
$A$	Surface area	Square meters (m²)
$X_s$	Saturation vapor pressure of water surface	Kilopascals (kPa)
$X$	Actual vapor pressure in the air	Kilopascals (kPa)

Solved Calculations:

Example 1

Step	Value	Explanation
Wind Speed ( $v$ )	$3 \, \text{m/s}$	Given
Surface Area ( $A$ )	$10 \, \text{m²}$	Given
Saturation Vapor ( $X_s$ )	$2.3 \, \text{kPa}$	Given
Actual Vapor ( $X$ )	$1.0 \, \text{kPa}$	Given
Calculation	$gh = (25 + 19 \cdot 3) \cdot (10) \cdot (2.3 – 1.0)$	Plug values into formula
Simplification	$gh = (82) \cdot (10) \cdot (1.3)$	Simplify terms
Result	$gh = 1,066 \, \text{kg/hr}$	Evaporation rate

Example 2

Step	Value	Explanation
Wind Speed ( $v$ )	$5 \, \text{m/s}$	Given
Surface Area ( $A$ )	$15 \, \text{m²}$	Given
Saturation Vapor ( $X_s$ )	$3.0 \, \text{kPa}$	Given
Actual Vapor ( $X$ )	$1.5 \, \text{kPa}$	Given
Calculation	$gh = (25 + 19 \cdot 5) \cdot (15) \cdot (3.0 – 1.5)$	Plug values into formula
Simplification	$gh = (120) \cdot (15) \cdot (1.5)$	Simplify terms
Result	$gh = 2,700 \, \text{kg/hr}$	Evaporation rate

What is the Evaporation Rate (Water) Calculator?

The Evaporation Rate (Water) Calculator is a precise tool that helps estimate how quickly water evaporates under varying conditions such as temperature, surface area, and humidity.

This calculator is particularly useful for applications like swimming pool maintenance, industrial cooling systems, or environmental studies. It utilizes scientific formulas to compute evaporation rates in units such as liters per hour or millimeters per day.

To calculate the evaporation rate, input factors like water temperature, air temperature, relative humidity, and exposed surface area. The calculator then applies standard formulas to deliver an accurate evaporation rate.

For example, if you’re managing a cooling tower, you can determine how much water will evaporate daily, aiding in resource planning.

Additionally, this calculator proves valuable in academic settings, offering insights into topics like evapotranspiration, energy transfer, and heat loss through evaporation.

With its simplicity and efficiency, it is a critical resource for environmental scientists, engineers, and homeowners alike.

Final Words:

In conclusion, the Evaporation Rate (Water) Calculator simplifies the complex process of measuring water loss through evaporation. By integrating key variables, it provides accurate and actionable results for both personal and professional use.