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Comparative study of natural solar drying of cassava, banana and mango

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  • Touré, Siaka
  • Kibangu-Nkembo, Serge

Abstract

This paper is about a comparative study of some parameters related to natural solar drying of cassava, ripe(I) or raw(II) plantain banana and mango. The comparative study was carried out by investigating the constant rate period, the falling rate period and the transition between these two periods. For the constant rate period, the product temperature Tp and the ambient temperature Ta were analysed in relation with the initial moisture content Wi. Then the maximum temperature difference DTmax between Ta and Tp was investigated, and found to decrease exponentially with Wi. In the constant rate period, parameters such as hc/λ, dm/dt and the mass transfer coefficient hm were reported and discussed. A new parameter was then introduced and termed the specific rate Rsp, which strongly correlated to Wi and DTmax. The critical point Wc was also taken into account. As for the falling rate period, the study was carried out by means of the overall resistance to diffusion Rds. The next step was the analysis of the drying rhythms. Finally, the investigation about the rewetting behaviour of the four products was made by using the desorption and sorption velocities (Vdes and Vsor), and the rewetting rate, too.

Suggested Citation

  • Touré, Siaka & Kibangu-Nkembo, Serge, 2004. "Comparative study of natural solar drying of cassava, banana and mango," Renewable Energy, Elsevier, vol. 29(6), pages 975-990.
  • Handle: RePEc:eee:renene:v:29:y:2004:i:6:p:975-990
    DOI: 10.1016/j.renene.2003.09.013
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    Cited by:

    1. Fudholi, A. & Sopian, K. & Ruslan, M.H. & Alghoul, M.A. & Sulaiman, M.Y., 2010. "Review of solar dryers for agricultural and marine products," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(1), pages 1-30, January.
    2. Dissa, A.O. & Bathiebo, J. & Kam, S. & Savadogo, P.W. & Desmorieux, H. & Koulidiati, J., 2009. "Modelling and experimental validation of thin layer indirect solar drying of mango slices," Renewable Energy, Elsevier, vol. 34(4), pages 1000-1008.
    3. Dissa, A.O. & Bathiebo, D.J. & Desmorieux, H. & Coulibaly, O. & Koulidiati, J., 2011. "Experimental characterisation and modelling of thin layer direct solar drying of Amelie and Brooks mangoes," Energy, Elsevier, vol. 36(5), pages 2517-2527.
    4. EL-Mesery, Hany S. & EL-Seesy, Ahmed I. & Hu, Zicheng & Li, Yang, 2022. "Recent developments in solar drying technology of food and agricultural products: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 157(C).

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