How It Works

The lower the Equilibrium Moisture Content (EMC), the thirstier the air is. Desert Air grain dryers raise the air temperature which lowers the humidity and the EMC, thus making your aeration system more efficient. The grain will dry faster.

Increasing the air temperature automatically reduces the relative humidity and the EMC. For every 1 degree F the Desert Air raises the air temperature, the relative humidity drops by 2 1/2%. Raising the air temperature by 10 degrees F drops the humidity by 25%. Raising the air temperature by 20 degrees F drops the humidity by half.

How much heat can you add? More is not necessarily better! Unless your bin has a stirring system, 20 degrees F is the maximum one should ever increase the air temperature with aeration. While grain dryers do use higher temperatures, they also have air flow rates in the 50 CFM/Bushel range while aeration has air flows in the 1 CFM/Bushel range. If more than 20 degrees F of heat is added to aeration, the bottom of the bin will get over dried.

The Desert Air Grain Drying System accomplishes these optimum temperatures and prevents over drying by utilizing a Variable Speed Injection Mixing System. This system maintains the desired plenum temperatures by increasing or decreasing the temperature of the water circulating through the heat exchanger compensating for the changing outside temperatures.