Estimation Of Drying Parameters
Including Moisture Diffusivity By Using
Temperature Measurements
Author(s)
G. H. Kanevce, L. P. Kanevce, V. B. Mitrevski
& G. S. Dulikravich
Abstract
This paper deals with the estimation of the moisture diffusivity, together with
other thermophysical properties, as well as the heat and mass transfer
coefficients of a convective drying body, on the basis of single thermocouple
temperature measurements by using an inverse approach. Potato and apple slices
have been chosen as representative drying bodies with significant shrinkage
effects. A mathematical model of the drying process of shrinking bodies has
been applied. The Levenberg-Marquardt method and a hybrid optimization
method of minimization of a resulting least-squares norm were used to solve the
present inverse problem. The experiments have been conducted on the
experimental setup that is designed to simulate an industrial convective dryer.
An analysis of the influence of the drying air speed, temperature and relative
humidity, drying body dimensions, and drying time on the estimation of the
unknown parameters enables the design of appropriate experiments that have
been conducted as well. The estimated moisture diffusivities are compared with
the results published by other authors. The experimental transient temperature
and moisture content changes during the drying are compared with numerical
solutions.
Keywords: inverse approach, thermophysical properties, drying.
Keywords
inverse approach, thermophysical properties, drying
Related Book
Other papers in this volume
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