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Drying Kinetics of Muskmelon Slices and Characteristics of an Indirect Solar Dryer under Natural and Forced Convection: A Comparative Study

Drying Kinetics of Muskmelon Slices and Characteristics of an Indirect Solar Dryer under Natural... The performance, thermal parameters and drying kinetics of muskmelon are calculated in an indirect natural convection solar dryer (INCSD) and indirect forced convection solar dryer (IFCSD). The initial moisture content (MC) of muskmelon slices was 12.4156 kg/kg of db (db) and it declined to 0.1605 db in 15, 18 and 22 h in IFCSD, INCSD and open sun drying (OSD), respectively. The estimated collector and drying efficiencies (ηcl and ηdr) were 58.5 and 9.39% in INCSD and the same were 66.37 and 12.11% in IFCSD, respectively. The specific moisture extraction rate (SMER) was 0.544 and 0.6204 kg/kWh in INCSD and IFCSD, respectively. The Verma model was relevant to fit the drying characteristics of muskmelon in INCSD, IFCSD and OSD. The thermal parameters such as effective moisture diffusivity (Defm), surface transfer coefficients (hht and hmt) and activation energy (Eac) were also determined for both setups. The average increment of 13.45% on ηcl, 28.97% on ηdr, 14.04% on SMER, 24.08% on Defm, 55.36% on hht, 55.16% on hmt, and 24.83% on Eac were observed in IFCSD than INCSD. The Eac of muskmelon slices was 38.06 and 28.61 kJ/mol in INCSD and IFCSD, respectively. Uncertainty analysis was performed and error bars were included in all the plots. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Solar Energy Springer Journals

Drying Kinetics of Muskmelon Slices and Characteristics of an Indirect Solar Dryer under Natural and Forced Convection: A Comparative Study

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References (42)

Publisher
Springer Journals
Copyright
Copyright © Allerton Press, Inc. 2022. ISSN 0003-701X, Applied Solar Energy, 2022, Vol. 58, No. 6, pp. 829–846. © Allerton Press, Inc., 2022.
ISSN
0003-701X
eISSN
1934-9424
DOI
10.3103/s0003701x22060123
Publisher site
See Article on Publisher Site

Abstract

The performance, thermal parameters and drying kinetics of muskmelon are calculated in an indirect natural convection solar dryer (INCSD) and indirect forced convection solar dryer (IFCSD). The initial moisture content (MC) of muskmelon slices was 12.4156 kg/kg of db (db) and it declined to 0.1605 db in 15, 18 and 22 h in IFCSD, INCSD and open sun drying (OSD), respectively. The estimated collector and drying efficiencies (ηcl and ηdr) were 58.5 and 9.39% in INCSD and the same were 66.37 and 12.11% in IFCSD, respectively. The specific moisture extraction rate (SMER) was 0.544 and 0.6204 kg/kWh in INCSD and IFCSD, respectively. The Verma model was relevant to fit the drying characteristics of muskmelon in INCSD, IFCSD and OSD. The thermal parameters such as effective moisture diffusivity (Defm), surface transfer coefficients (hht and hmt) and activation energy (Eac) were also determined for both setups. The average increment of 13.45% on ηcl, 28.97% on ηdr, 14.04% on SMER, 24.08% on Defm, 55.36% on hht, 55.16% on hmt, and 24.83% on Eac were observed in IFCSD than INCSD. The Eac of muskmelon slices was 38.06 and 28.61 kJ/mol in INCSD and IFCSD, respectively. Uncertainty analysis was performed and error bars were included in all the plots.

Journal

Applied Solar EnergySpringer Journals

Published: Dec 1, 2022

Keywords: Indirect solar dryer; forced convection dryer; effective moisture diffusivity; specific moisture extraction rate; activation energy

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