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Title:Microprocessor Controlled Low Temperature Grain Drying
Author(s):Morrison, David Wayne
Department / Program:Agricultural Engineering
Discipline:Agricultural Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Engineering, Agricultural
Abstract:The purpose of this study was to develop a microprocessor based controller capable of optimizing the drying process in a low temperature corn drying bin by controlling the drying fan operation. A procedure was developed to predict the moisture profile in a drying bin based on the measured temperature profile. This procedure was incorporated into a controlling algorithm that used the predicted moisture profile and sensed ambient temperature and humidity to select the hourly mode of fan operation that would dry corn the most energy efficiently.
The effectiveness of the controlling algorithm at reducing energy consumption in a low temperature corn drying bin was tested by computer simulation using 15 years of historic Springfield, Illinois weather data to drive the simulations. Results showed that the microprocessor controlled low temperature drying procedure dried corn using an average of 21.5 percent less electrical energy than did uncontrolled continuous fan operation drying and 28.4 percent energy than did humidistat controlled supplemental heater drying.
To test the controlling procedure in actual operation the controlling algorithm was programmed into an IBM Personal Computer interfaced to a laboratory sized drying bin. Experimental results showed a 15 percent energy savings when controlled low temperature grain drying was compared to uncontrolled drying.
Issue Date:1985
Description:169 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1985.
Other Identifier(s):(UMI)AAI8521842
Date Available in IDEALS:2014-12-16
Date Deposited:1985

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