Development of mathematical model of drying amaranth seeds in the machine with a balanced twisted - layer

Intensification of drying is a major improvement of the drying equipment and technology. Development and implementation in the industry of high-intensity devices with active hydrodynamic regimes, provides in many cases, higher technical and economic indicators. The use of devices with twisted coolant flow to intensify the process of drying of dispersed materials is both theoretical interest and practical value. The processes of heat and mass transfer in drying machines are largely determined by the hydrodynamic conditions in its internal volume. Given the complexity of the geometry and structure of the velocity field in the balanced twisted-layer, which in general is essentially three-dimensional, it is necessary to decompose the hydrodynamic problem into two parts superposition. From the analysis of the physical picture implies that the path of the current lines of his close family helical curves. Based on the theoretical analysis of heat and mass transfer process of drying seeds of amaranth in the office with a balanced twisted-layer authors developed a mathematical model of it. The structure of the flow of the drying process in the cross-sections of the device. The model is based on the fundamental equations A.V. Lykov, describes a heat moisture transfer in capillary-porous environments in a linear thermodynamic approach, given the method of convective heat supply and the small size of dried seeds of amaranth. These equations describe the dynamic change in the fields of temperature and moisture content in a conjugated heat and mass transfer at the interface solid phase - coolant. Found macrokinetic natural process. The results will be useful for a wide range of professionals involved in drying seeds of amaranth, as well as for calculation and design of modern dryers. On the basis of experimental data and their statistical treatment has been received a mathematical model that adequately describes the process of drying seeds of amaranth in the device with twisted coolant flow. The character of changes in the optimization criteria, depending on the input factors. The results of the mathematical model will be useful a wide range of professionals involved in drying seeds of amaranth, as well as for calculation and design of modern dryers.