Abstract
Corn seed ( Zea mays L.) very often is harvested on the ear at high moisture so as to reduce the risk of frost, insect, and disease damage. The harvest is started at seed moisture as high as 40%, and ears are subsequently dried mechanically with heated air before shelling. The drying process has been a frequent cause of seed injury and great economic loss. Damage is most frequently encountered when the drying temperature is elevated or the loss of moisture is delayed. Dehumidification has long been used to safely dry perishable products and to maintain their quality during storage. Utilizing a dehumidification system which was based on heat pump technology allowed acceleration of the drying process without elevating the temperature. The heat pump system is also less expensive to operate than traditional natural gas fired systems and produces high quality seed.
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