Solar drying of guavas, papayas and apples
This paper includes the results of a study carried out to determine the drying characteristics of three agricultural fruit products. The products used in this analysis were apples, guavas and papayas. The drying characteristics of the three products were investigated under different operating cond...
| Main Authors: | , |
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| Format: | Book Chapter |
| Language: | English |
| Published: |
IIUM Press
2011
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/20053/ http://irep.iium.edu.my/20053/ http://irep.iium.edu.my/20053/1/solar_drying_of_guavas_-_C6.pdf |
| Summary: | This paper includes the results of a study carried out to determine the drying characteristics of three
agricultural fruit products. The products used in this analysis were apples, guavas and papayas. The
drying characteristics of the three products were investigated under different operating conditions by
varying now velocities and the thickness of the specimens. An experimental solar dryer was built to
conduct tests on different samples. Tests were carried under both natural and forced convection
conditions. Different meteorological conditions were considered in the experiments. A analytical model.
based on Fick's second law of diffusion. was used to determine the effective diffusion coefficients of the
three products. The diffusion coefficients were obtained from the slope of in (w/wo) against t/L2. It was
found that the diffusivities of apples, guavas and papayas range between 5.74xI0-12 and 8.6IxI0-IO
1112/s. It was also observed that shrinkage occurred in the above three specimens during drying. This effect
was taken into account and a correction factor for thickness, L, was introduced. |
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