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Experimental studies on hemi cylindrical walk-in type solar tunnel dryer for grape drying

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  • Rathore, N.S.
  • Panwar, N.L.

Abstract

A walk-in type hemi cylindrical solar tunnel dryer has been built with heat protective north wall at College of Dairy and Food Science Technology, Udaipur, India for drying agricultural & horticulture product on large scale. In this paper attempt has been made to evaluate the performance of developed dryer to dry the seedless grapes (mutant: Sonaka). The study show that chemically untreated grapes took seven days to dry at 16% (wb) moisture content. The temperature gradient inside the tunnel dryer is about 10-28 °C during the clear day, which is quite sufficient to dry agricultural commodities.

Suggested Citation

  • Rathore, N.S. & Panwar, N.L., 2010. "Experimental studies on hemi cylindrical walk-in type solar tunnel dryer for grape drying," Applied Energy, Elsevier, vol. 87(8), pages 2764-2767, August.
    • Handle: RePEc:eee:appene:v:87:y:2010:i:8:p:2764-2767
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    References listed on IDEAS

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    1. Ekechukwu, O.V. & Norton, B., 1997. "Design and measured performance of a solar chimney for natural-circulation solar-energy dryers," Renewable Energy, Elsevier, vol. 10(1), pages 81-90.
    2. Ng, Ah Bing & Deng, Shiming, 2008. "A new termination control method for a clothes drying process in a clothes dryer," Applied Energy, Elsevier, vol. 85(9), pages 818-829, September.
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