Experimental studies and mathematical simulation of intermittent infrared and convective drying of sweet potato (Ipomoea batatas L.)

•A mathematical model was developed for IIRCD of sweet potato.•The model adequately predicted moisture and temperature distribution of sweet potato.•Drying using IIRCD produced dried sweet potato slices of better quality. Intermittent infrared and convective drying (IIRCD) is a novel drying method t...

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Bibliographic Details
Published in:European management journal 2019-03, Vol.114 (2), p.163-174
Main Authors: Onwude, Daniel I., Hashim, Norhashila, Abdan, Khalina, Janius, Rimfiel, Chen, Guangnan
Format: Article
Language:English
Subjects:
COMSOL
Crops
Energy efficiency
Food preservation
Food quality
Intermittent
Intermittent infrared and hot-air drying
Mathematical models
Modelling and simulation
Moisture
Novel drying method
Physics
Physics-based model
Potatoes
Quality of dried products
Simulation
Studies
Sweet potato
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Summary:•A mathematical model was developed for IIRCD of sweet potato.•The model adequately predicted moisture and temperature distribution of sweet potato.•Drying using IIRCD produced dried sweet potato slices of better quality. Intermittent infrared and convective drying (IIRCD) is a novel drying method that can enhance energy efficiency and quality of dried product. The mechanism of drying using this method is not yet fully understood. Mathematical models that describe the drying process of IIRCD for agricultural crops do not exist. In this study, a physics based mathematical model was developed to understand the mechanism of drying sweet potato using IIRCD. The model was based on shrinkage dependent diffusivity and evaporation phenomenon. COMSOL Multiphysics finite element software was employed for the model simulation. The simulation results of moisture and temperature distribution were validated by experimental drying data. The results fitted closely with experimental data. Drying of sweet potato using IIRCD was found to be more efficient in terms of final product quality compared to convective hot-air drying method.
ISSN:0960-3085
0263-2373
1744-3571
1873-5681
DOI:10.1016/j.fbp.2018.12.006