Thanks to the large surface pads inside the evaporative cooler, water from the unit’s reservoir is distributed over the pads using a pump, keeping them continuously wet. Hot air drawn into the device by the fan is cooled as it passes through these wet pads, and the resulting air is supplied into the environment as fresh and clean air through ducts.
Since continuous fresh and cool air is supplied into the space, a positive air pressure is created, which pushes hot and stale air out through open areas. The evaporative cooling system performs cooling depending on outdoor temperature and relative humidity.
The effectiveness of the system is determined using the psychrometric diagram.
What is the Psychrometric Diagram?
The psychrometric diagram, widely used in engineering, is a chart that graphically represents the physical properties of moist air. It is used to determine air properties and calculate how much cooling can be achieved indoors based on outdoor conditions.