Journal of Agricultural Science and Technology
Journal of Agricultural Science and Technology
JAST
Agriculture
http://jast.modares.ac.ir
1
admin
1680-7073
2345-3737
10.22034/jast
en
jalali
1396
12
1
gregorian
2018
3
1
20
2
online
1
fulltext
en
Effect of Different Drying Conditions on the Mass Transfer Characteristics of Kiwi Slices
In this study, the influences of drying conditions on the mass transfer characteristics of kiwi slices are investigated using the analytical model proposed by Dincer and Dost. The experiments were conducted at temperature range of 50–80°C with 0.5 m s<sup>-1</sup> air velocity for convective drying and in the microwave power range of 200–500W for microwave drying as single layers with sliced thickness of 3, 6, and 9 mm. The results show that the mass transfer characteristics strongly depend on the drying conditions. Through the convective drying method, parameters including moisture diffusivity, mass transfer coefficient, Biot number, and drying time were varying from 0.16-1.45×10<sup>-8</sup> m<sup>2</sup> s<sup>-1</sup>, 1.93-4.95×10<sup>−7</sup> m s<sup>-1</sup>, 0.103-0.225, and 90-604 minutes, respectively. In comparison, for microwave drying, they were within the ranges of 0.66-25.60×10<sup>-8</sup> m<sup>2</sup> s<sup>-1</sup>, 0.62-5.64×10<sup>−5</sup> m s<sup>-1</sup>, 0.960-1.742, and 4-23.5 minutes, respectively. Results reveal that the activation energy for moisture diffusion is higher than that needed for the convective mass transfer process.
Activation energy,Analytical modeling,Drying method,Moisture diffusivity
249
264
http://jast.modares.ac.ir/browse.php?a_code=A-23-16779-1&slc_lang=en&sid=23
H.
Darvishi
H.
Darvishi
100319475328460071240
100319475328460071240
Yes
Department of Biosystems Engineering; Faculty of Agriculture, University of Kurdistan, Sanandaj, Islamic Republic of Iran.
Department of Biosystems Engineering; Faculty of Agriculture, University of Kurdistan, Sanandaj, Islamic Republic of Iran.
P.
Mohamamdi
P.
Mohamamdi
100319475328460071239
100319475328460071239
No
Department of Biosystems Engineering; Faculty of Agriculture, University of Kurdistan, Sanandaj, Islamic Republic of Iran.
Department of Biosystems Engineering; Faculty of Agriculture, University of Kurdistan, Sanandaj, Islamic Republic of Iran.
M.
Azadbakht
M.
Azadbakht
100319475328460071238
100319475328460071238
No
Department of Biosystems Engineering; Faculty of Water and Soil Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Islamic Republic of Iran.
Department of Biosystems Engineering; Faculty of Water and Soil Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Islamic Republic of Iran.
Z.
Farhudi
Z.
Farhudi
100319475328460071237
100319475328460071237
No
Department of Biosystems Engineering; Faculty of Agriculture, University of Kurdistan, Sanandaj, Islamic Republic of Iran.
Department of Biosystems Engineering; Faculty of Agriculture, University of Kurdistan, Sanandaj, Islamic Republic of Iran.