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Evaporative Cooling Efficiency Calculator

Formula

The formula to calculate the evaporative cooling efficiency (eff) is:

$eff = \frac{DB - OT}{\Delta T}$

Where:

$eff$ is the efficiency of the cooler
$DB$ is the dry-bulb temperature
$OT$ is the outlet temperature
$\Delta T$ is the total change in temperature from inlet to outlet

Definitions

Evaporative Cooling: A process by which heat is transferred from an object or air through the evaporation of water. When water evaporates, it requires heat in order to do so, taking heat away from whatever it was in contact with, causing cooling.

Example

Let's say the dry-bulb temperature (DB) is 35°C, the outlet temperature (OT) is 25°C, and the total temperature change (ΔT) is 10°C. Using the formula:

$eff = \frac{35 - 25}{10}$

We get:

$eff = 1$

So, the efficiency of the cooler is 1 (or 100%).