Abstract
Postharvest processing of grain is an
important step in the overall grain production
process. It makes possible not only quantitative
and qualitative preservation of the harvest, but
also ensures maximum profit from its sale at the
most favorable market conditions. Convective
heat treatment (drying, cooling) guarantees
commercial harvest conservation, prevents its
loss, and in some cases improves the quality of
the finished product.
The necessity of intensification and
automation of technological processes of
postharvest grain processing requires the
development of methods of mathematical
modeling of energy-intensive processes of
convective heat treatment. The determination
and substantiation of optimum modes and
parameters of equipment operation to ensure the
preservation of grain quality is possible only
when applying mathematical modeling
techniques.
In this work, a mathematical model of
particulate material drying is presented through
a system of differential equations in partial
derivatives of which the variable in time and
space relationship between heat and mass
transfer processes in the material and a drying
agent is reflected.
The aim of the research was to determine
the dynamics of the interrelated fields of
unsteady temperature and moisture content of
the material and the drying agent on the basis of
mathematical models of heat and mass transfer
in the layer of particulate material in convective
heat approach or heat retraction.
The implementation of the mathematical
model proposed in the standard mathematical set
allows analyzing efficiency of machines and
equipment for the convective heat treatment of
particulate agricultural materials in a dense
layer, according the determinant technological
parameters and operating modes.
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