Intensive Energy Saving Method of Grain Drying

1 Kazakh National Agricultural University (Almaty), Kazakhstan, Almaty city, 050010, Kazakhstan
2 University of Ruse, Department of Automatics and Mechatronics, BG-7017 Ruse, Bulgaria


DZHAMBURSHYN, A. Sh., A. K. ATYHANOV, A. Zh. SAGYNDYKOVA, H. BELOEV and P. DASKALOV, 2016. Intensive energy saving method of grain drying. Bulg. J. Agric. Sci., 22: 318–323

The method of drying of grain and removal of moisture which is based on receiving and processing of arising thermal processes described by the thermodynamics equation is developed. For carrying out pilot studies, it is developed the transistor – thyristor device, which consists of the control unit, the converter of frequency, the bunker with the screw in it that has helix surface, inductor windings, and a hydrometer. The algorithm of receiving and data processing is developed in the MATLAB software. It is a first time when the Maxwell’s formula is suitable for calculating a heat taken from grain moisture.

Key words: Grain drying, electromagnetic induction, the amount of generated heat, the Maxwell formula
Abbreviations: W – humidity of grain, %; I – density of a stream of moisture; k – kinetic coefficient of moisture transfer (proportionality coefficient), depending on physical and chemical properties of a material; δ – coefficient of thermo-moisture transfer of a material; E – electromagnetic intensity V/m; tgδ – losses dielectric angles characterized by the environment and frequency of microwaves generation (it completes 90º angle of phase shifting between current and tension in a condenser between facings of which the material is placed); ω – the settable frequency of the microwave generator, GHz; C1 – condenser capacity at the time of grain loading; C2 –air condenser capacity; ε – dielectric permeability of wet grain; ε1 – dielectric permeability of material; ε0 – dielectric permeability of absolutely dry grain; ε0 – dielectric permeability of absolutely dry grain; a – constant; b – constant; Q – amount of emitted heat; σcoefficient of losses

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