Modeling and comparative analysis of solar drying behavior of potatoes
| Autor: | Ahmed Djebli, Salah Hanini, Amina Benhamou, Ouassila Badaoui, Brahim Haddad |
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| Rok vydání: | 2020 |
| Předmět: |
Solar dryer
060102 archaeology Renewable Energy Sustainability and the Environment business.industry 020209 energy Theoretical models 06 humanities and the arts 02 engineering and technology Solar drying Solar energy Forced convection Tray 0202 electrical engineering electronic engineering information engineering Environmental science 0601 history and archaeology business Process engineering Consumer market |
| Zdroj: | Renewable Energy. 145:1494-1506 |
| ISSN: | 0960-1481 |
| DOI: | 10.1016/j.renene.2019.07.083 |
| Popis: | Potatoes are a very high demand product in the consumer market and are widely available everywhere in Algeria. With the extensive levels of solar energy across the country, solar drying becomes a natural avenue for the production of solar dried potatoes as a new prospective commercial product. This paper is a study of the drying process of potatoes using an indirect and a mixed solar dryer with forced convection and a comparison of their respective performances. Experimental results indicated that the mixed solar dryer had the slowest drying rate compared to the indirect solar dryer with drying times of 4 h 45min and 3 h 40min respectively, even though the temperature at the tray level in the mixed solar dryer was higher than that of the indirect solar dryer. Fourier series and Laplace transforms were used to solve the diffusivity equation. Seven theoretical models were investigated and their relative accuracy validated against experimental data. Two new dimensionless models were found to best fit the drying curve of potato slices using the two dryers. The proposed models were found to be more accurate for charactering the drying process of Sultana grapes, chili peppers, bananas, mangoes and cassava, according to models reported in the literature under different operating conditions using various solar dryer designs. |
| Databáze: | OpenAIRE |
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