Grain drying time depends on the size and efficiency of the dryer, the moisture content of the grain and the volume or weight of grain to be dried. The drying time for grain is probably best illustrated with an example calculation.
It takes about 1500-2500 BTUs to evaporate 1 lb of water. The manufacturer of the grain dryer should be able to provide these specifications. For this calculation the energy requirement is assumed to be 2000 BTUs/lb.
The heating rate in BTU/hr is usually stamped on the dryer or heated aeration unit. For this calculation it is assumed to be 40,000 BTUs/hr.
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