Fan And Pad Cooling System Definition

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.

Fan and pad cooling system definition.

In this system aspen or cellulose pads are mounted in one endwall or sidewall of the greenhouse. Pad and fan systems are part of a greenhouse s mechanical ventilation system. With this type of system exhaust fans are placed in one wall of the greenhouse and pads are in the opposite wall. The 4 or 6 inch thick pad is treated with anti rot salts stiffening and wetting agents.

The pads are held in place by component parts of the system. The fans exhaust air from the greehnouse and draw in fresh air through the pads. The fan and pad system has been the standard system for evaporative cooling for more than 50 years. Fan and pad system.

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. Using an evaporative pad and fan requires a fan mounted opposite the evaporative pads. Fan and pad evaporative cooling systems. It contains a cellulose pad overhead water supply pipe gutter to collect excess water a sump tank pump piping and control.

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. Although not optimal it is better than no cooling at all. Energy efficient cooling custom designs available the pump and sump. Cooling pads cool by creating large amounts of surface area that are exposed to air being drawn into the greenhouse by exhaust fans.

Several evaporative cooling systems work well in commercial greenhouses. The most common is the fan and pad system. Note that swamp coolers can be considered stand alone evaporative cooling systems but otherwise operate similarly as pad and fan systems. A fan and pad system uses exhaust fans to pull air through evaporative cooling pads.