THIN LAYER DRYING MODELING OF APPLES AND APRICOTS IN A SOLAR-ASSISTED DRYING SYSTEM

Year 2018, Volume: 4 Issue: 1, 1680 - 1691, 12.12.2017

A. Stegou–Sagia Stegou–sagia

https://doi.org/10.18186/journal-of-thermal-engineering.364909

Cited By: 3

Abstract

This work
presents the drying process of apricots and apples which have been considered
for drying in a solar-assisted forced convection tray dryer. The logarithmic
model has been used to describe the drying behavior of apples and apricots at
different air temperatures (50 °C to 80 °C) and at different air velocities
(0.5 m/s to 2 m/s) based on experimental data from several studies.

The slice
thickness of apples has been assumed at 10 mm with initial moisture content 87
% d. b; the main diameter of apricots was 40 mm with initial moisture content
80 % d. b. The changes in moisture content with drying time during the drying
period have been presented indicating the absence of the constant rate period.

In addition, drying
air flow rates and temperatures had an important effect on the drying time and
on the moisture removal from apricots and apples. Finally, the effective
moisture diffusivity values have been estimated from Fick’s diffusion model
pointing out that it has been increased with the increase of the drying air
temperature

Keywords

Tray Dryer, Solar Assisted, Apricots, Apples, Logarithmic Model

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