AMES, IOWA - When harvest conditions require high-temperature grain drying, the dryer system may be the bottleneck that limits harvest rate. A new publication from Iowa State University Extension addresses techniques for dryeration and combination drying to increase the drying rate for high-temperature corn dryers.

"Dryeration and Combination Drying for Increased Capacity and Efficiency" (PM 2089K) is available to download from the Extension Online Store,

This publication illustrates dryeration techniques and management considerations to increase both drying capacity and overall energy efficiency. Topics include delayed cooling, moisture testing, system design and combination drying using both high-temperature and low-temperature systems to achieve optimal results.

"In high-temperature systems, moisture is removed from the corn kernels faster than the moisture can equalize within the kernels," said Shawn Shouse, ISU Extension agricultural engineer. "The dryeration process allows this moisture to move towards the surface of the kernel where it can be removed more efficiently."

"Implementing dryeration or combination drying requires additional planning, but the energy savings are considerable," said Dana Petersen, ISU Extension program coordinator with the Farm Energy Conservation and Efficiency Initiative.

The publication is part of a series of farm energy conservation and efficiency educational materials being developed through the ISU Farm Energy Conservation and Efficiency educational initiative. The purpose is to increase farmers' awareness of opportunities for improving efficient use of farm energy. The initiative also will help farmers explore alternatives to reduce farm energy demand and to improve their farms' overall profitability in a rapidly changing energy environment.

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SOURCE: Iowa State University Extension