Performance evaluation of solar tunnel dryer for grape drying
by N.S. Rathore; N.L. Panwar; Bhawana Asnani
International Journal of Renewable Energy Technology (IJRET), Vol. 3, No. 1, 2012

Abstract: This paper presents the performance of solar tunnel dryer to dry chemically untreated grape. Average air temperature rise in dryer was in the range of 20-21°C above the ambient temperature and it was almost constant in the dryer. The solar tunnel dryer of size 10 × 3.75 m² is in position to dry 320 kg of grapes from 85% (wb) moisture content to 16% (wb) moisture content within seven days. Developed solar dryer works at temperature between 55-70°C, therefore, there is scope for saving conventional fuel by adoption of solar energy-based drying operation.

Online publication date: Wed, 29-Oct-2014

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