Using an evaporative pad and fan requires a fan mounted opposite the evaporative pads.
Fan and pad cooling system definition.
A fan and pad system uses exhaust fans to pull air through evaporative cooling pads.
Ventilation pad and fan systems also called evaporative pad and fan systems is the most common method of cooling a greenhouse in warm weather regions.
Fan and pad system.
The 4 or 6 inch thick pad is treated with anti rot salts stiffening and wetting agents.
The most commonly used evaporative cooling system used in greenhouses is the fan and pad evaporative cooling system see figures 5 5 and 5 6.
In this system aspen or cellulose pads are mounted in one endwall or sidewall of the greenhouse.
Although not optimal it is better than no cooling at all.
Pad and fan systems are part of a greenhouse s mechanical ventilation system.
The fan and pad system has been the standard system for evaporative cooling for more than 50 years.
The pads are held in place by component parts of the system.
With this type of system exhaust fans are placed in one wall of the greenhouse and pads are in the opposite wall.
Several evaporative cooling systems work well in commercial greenhouses.
Cooling pads cool by creating large amounts of surface area that are exposed to air being drawn into the greenhouse by exhaust fans.
Energy efficient cooling custom designs available the pump and sump.
Fan and pad systems consist of exhaust fans at one end of the greenhouse and a pump circulating water through and over a porous pad figure 2 installed at the opposite end of the greenhouse.
It contains a cellulose pad overhead water supply pipe gutter to collect excess water a sump tank pump piping and control.
Tall evaporative cooling pad system supports are required on 4 inch pad systems over 48 inch tall and 6 inch pad systems over 72 inch tall.
Note that swamp coolers can be considered stand alone evaporative cooling systems but otherwise operate similarly as pad and fan systems.
This technique utilizes the cooling effect produced when water evaporates and cools the air as it is pulled through the pad.
Fan and pad evaporative cooling systems.
