Mathematical simulation of drying plant material in a drum dryer at a variable speed of moving material

Abstract

In the system of technological operations postharvest handling harvest crops occupies an important place dry. Universal dryer drum widely used in households, since, allow dewatering of various loose moist materials, but for a number of performance indicators (unit cost of energy, the level of automation, the implementation of environmental requirements, etc.), these dryers do not completely meet the current requirements of agricultural and processing industries. Solving optimization problems on performance and energy consumption drum units is possible only if adequate mathematical model of heat and mass transfer considering the determining process parameters. The article is based on an analysis of the literature substantiated scientific task analytic mathematical description and calculation of the defining parameters of drying plant material dispersed in the drum units. With the help of heat and material balance based on simplistic ideas about the processes of heat and mass transfer mathematical model that describes the change in the parameters of the drying agent and the material in the drum unit in the process of moving along the rotary drum. For example, analytical analysis of changes in temperature of the drying agent and moisture content material and its solution are obtained for linear equations law material moving along the drum. Thus, in the result of the study received a fixed mathematical model of drying plant material in the drum unit. Designated analytical dependence describing the distribution parameters of drying material in the drum with regard variable speed of moving.