What Is the Evaporative Cooling Saturation Efficiency Calculator?
The Evaporative Cooling Saturation Efficiency Calculator measures how effectively an evaporative media pad cools process air toward its thermodynamic limit.
How Does the Evaporative Cooling Saturation Efficiency Calculator Work?
It computes wet-bulb depression and calculates the percentage approach to the wet-bulb temperature per ASHRAE 133 standards.
Evaporative Cooling Saturation Efficiency Calculator Formula & Variables
The core mathematical equation utilized by this calculator is expressed as:
ASHRAE Standard 133 formula measuring how closely leaving air approaches the thermodynamic wet-bulb temperature.
How to Use the Evaporative Cooling Saturation Efficiency Calculator
- Input ambient entering dry-bulb and wet-bulb temperatures.
- Enter leaving dry-bulb temperature measured downstream of the cooling pads.
Step-by-Step Example Calculation
Hot Arid Climate Desert Evaporative Cooler
Input Values:
Understanding Your Result
Saturation Efficiency (%): Overall thermal effectiveness of water evaporation.
Wet-Bulb Depression: Total thermodynamic cooling potential available in ambient air.
Cooling Achieved: Actual sensible temperature reduction delivered.
Factors That Affect the Result
- Lower relative humidity widens wet-bulb depression, providing greater sensible cooling potential.
- Slower face velocities give air longer contact time with wetted surfaces, increasing efficiency.
When Should You Use This Calculator?
- Agricultural greenhouse ventilation, gas turbine power boosting, commercial data center cooling, and residential evaporative coolers.
Assumptions & Limitations
- Assumes steady-state adiabatic humidification with recirculating sumps near wet-bulb temperature.
Frequently Asked Questions
Calculation Accuracy & Reference Note
Adheres to ASHRAE Standard 133 and AMCA Standard 210.