Increasing Efficiency of Grain Drying With the Use of Electroactivated Air and Heater Control

Increasing Efficiency of Grain Drying With the Use of Electroactivated Air and Heater Control

Aleksey Vasiliev, Dmitry Budnikov, Natalia Gracheva, Alexander Smirnov
DOI: 10.4018/978-1-5225-3867-7.ch011
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This chapter describes how drying is the most power-consuming process of post-harvest processing. Methods are viewed of how to heighten productivity of grain-drying equipment and to decrease energy consumption of the process. Using electrically activated air as a drying agent provides greater efficiency in the process of drying grain with active ventilation. Saturation of the air with ions in this case is conducted cyclically. This allows the use of reactions of the biological object called “caryopsis” to cause external impacts to the material increasing the efficiency of drying. The parameters of the drying agent are changed by controlling the electric heater. The dependency of the rate and energy consumption of drying on the drying agent allows control of the process. The chapter presents experimental obtained dependencies, which allow for the design of algorithms to control the aforementioned type.
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Depending on the climatic zone, it may be necessary to dry up about 70% of the collected grain. If the moisture content in freshly harvested grain does not decrease, then mold and microorganisms actively develop in it, which leads to its spoilage. In a grain with a moisture content of more than 20%, foci of temperature increase rapidly develop. In these centers, the grain temperature can reach 60-80 degrees. This also leads to large grain losses. Therefore, drying is a necessary process, which is designed to preserve the crop. However, this is the most energy-intensive process in the post-harvest processing system. This requires a lot of electricity, liquid fuel, gas. Reducing these costs is an important production problem and a serious scientific task. In the presented material, the authors show how to reduce energy consumption for drying and improve the productivity of equipment.

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