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Thermal aspects of open sun drying of various crops

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  • Jain, D.
  • Tiwari, G.N.

Abstract

Open sun drying (OSD) is the most common method of crop drying in developing countries. Despite several disadvantages, it is widely practiced because it is a simple way of drying. Crop temperature, temperature around the crop, solair temperature, and rate of moisture evaporation are the important parameters in OSD. The thermal behavior of OSD of green chillies, green pea, white gram (kabuli chana), onions, potatoes, and cauliflower was studied. The heat transfer analysis which is mainly dependent on the rate of moisture transfer has also been extended during drying process. A mathematical model has been developed to predict the crop temperature, rate of moisture removal, and solair temperature for a steady state condition. The rate of moisture transfer for potato slices and cauliflower was significantly higher than that in other crops. A fair agreement was observed between predicted and experimental results with coefficient of correlations ranging from 0.8936 to 0.7520, 0.9792–0.4172, and 0.9986–0.9942 for crop temperature, temperature above the crop surface, and rate of the moisture removal during drying, respectively except potato slices.

Suggested Citation

  • Jain, D. & Tiwari, G.N., 2003. "Thermal aspects of open sun drying of various crops," Energy, Elsevier, vol. 28(1), pages 37-54.
    • Handle: RePEc:eee:energy:v:28:y:2003:i:1:p:37-54
    DOI: 10.1016/S0360-5442(02)00084-1
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    Citations

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    Cited by:

    1. VijayaVenkataRaman, S. & Iniyan, S. & Goic, Ranko, 2012. "A review of solar drying technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(5), pages 2652-2670.
    2. Muhammad Arslan Nawaz & Asif Ali Khan & Usman Khalid & Andreas Buerkert & Martin Wiehle, 2019. "Superfruit in the Niche—Underutilized Sea Buckthorn in Gilgit-Baltistan, Pakistan," Sustainability, MDPI, vol. 11(20), pages 1-22, October.
    3. Hatem Oueslati & Salah Ben Mabrouk & Abdelkader Mami, 2014. "Dynamic modelling and performance study of solar gas tunnel dryer," Mathematical and Computer Modelling of Dynamical Systems, Taylor & Francis Journals, vol. 20(2), pages 130-145, March.
    4. Daghigh, Roonak & Shafieian, Abdellah, 2016. "An experimental study of a heat pipe evacuated tube solar dryer with heat recovery system," Renewable Energy, Elsevier, vol. 96(PA), pages 872-880.
    5. Tiwari, Sumit & Tiwari, G.N. & Al-Helal, I.M., 2016. "Development and recent trends in greenhouse dryer: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 65(C), pages 1048-1064.
    6. 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.
    7. Poblete, Rodrigo & Cortes, Ernesto & Macchiavello, Juan & Bakit, José, 2018. "Factors influencing solar drying performance of the red algae Gracilaria chilensis," Renewable Energy, Elsevier, vol. 126(C), pages 978-986.
    8. Mustayen, A.G.M.B. & Mekhilef, S. & Saidur, R., 2014. "Performance study of different solar dryers: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 34(C), pages 463-470.

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