THERMAL SCIENCE

International Scientific Journal

Kesavan Seshachalam

,

Arjunan Thottipalayam Velliangiri

,

Vijayan Selvaraj

DRYING OF CARROT SLICES IN A TRIPLE PASS SOLAR DRYER

ABSTRACT
An indirect triple pass forced convection solar dryer was developed and its per-formance was evaluated for drying of carrot slices. The drying experiments were carried out under the meteorological conditions of Coimbatore city in India dur-ing the year 2016. The experimental set-up consists of a blower, triple pass packed bed air collector (using sand) with wire mesh absorber plate, and a drying chamber. The air mass flow rate was optimized to 0.062 kg/s. The initial moisture content of the carrot slices was reduced from 87.5% (on wet basis) to the final moisture content of 10% (wet basis) in 6 h duration. The thin layer drying charac-teristics were analyzed using twelve mathematical models available in open litera-ture. The results showed that the pick-up efficiency of the dryer was varied in the range between 14 and 43% with an average air collector thermal efficiency of 44% during the experimentation. The drying characteristics of carrot slices was predicted with good degree of accuracy using Wang and Singh drying model.
KEYWORDS
triple pass solar dryer, drying models, carrot drying
PAPER SUBMITTED: 2017-04-04
PAPER REVISED: 2017-05-25
PAPER ACCEPTED: 2017-06-23
PUBLISHED ONLINE: 2017-12-16
DOI REFERENCE: https://doi.org/10.2298/TSCI17S2389S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2017, VOLUME 21, ISSUE Supplement 2, PAGES [S389 - S398]
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DRYING OF CARROT SLICES IN A TRIPLE PASS SOLAR DRYER

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence