Avonlea Grain Temperature Monitors and Grain Drying

When using natural and low temperature grain drying, air is introduced into the bottom of the grain bin. This air will absorb moisture from grain at the bottom until equilibrium is reached for that Temp/RH. Once the grain has reached equilibrium with the air no more drying will occur in that area. The air will then move through the grain at the bottom of the bin and begin drying the grain above it. The bin dries from the bottom up and no drying will occur at the top of the bin until the grain at the bottom is at equilibrium. By using a temperature cable it is possible to follow this drying process in the bin:

1: After the fan is turned on the whole bin will go to the same temperature if the moisture content is the same. 2: As the grain reaches equilibrium at the bottom of the bin the temperature will be slightly higher in this area. The reason for this is that evaporation of moisture (cooling effect) has ceased. 3: Above the dry layer in the bin will be a wetter layer of grain. This area is called the drying front. The temperature in this region will be cooler than any other spot in the bin. This is because the greatest amount of evaporation (cooling effect) takes place here. 4: Above the drying front will be the grain not yet dried. The temperature of this grain will be warmer than the drying front but cooler than the dry grain. 5: Use of temperature cables makes it possible to monitor the progress of drying in your bin and gives a good indicator of progress.

For more information on how temperature monitoring systems work please CLICK HERE.

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