Title: Design, construction and performance testing of a simple low-cost solar dryer for agricultural and food products

Authors: Kapil Dev Sharma; Shobhit Srivastava; Jasbir Singh

Addresses: Mechanical Engineering Department, Faculty of Engineering and Technology, Gurukula Kangri (Deemed to be University), Haridwar, Uttrakhand, India ' Mechanical Engineering Department, Faculty of Engineering and Technology, Gurukula Kangri (Deemed to be University), Haridwar, Uttrakhand, India ' Mechanical Engineering Department, Faculty of Engineering and Technology, Gurukula Kangri (Deemed to be University), Haridwar, Uttrakhand, India

Abstract: This paper presents the design, construction, and testing of a simple solar dryer for food preservation, which is designed, constructed and tested in the Department of Mechanical Engineering, Gurukula Kangri Vishwavidyalaya, Haridwar, India. Its construction was completed using mainly inexpensive locally available materials to make it relatively inexpensive for the average poor farmer living in rural areas. Experimental analysis is performed for both natural and forced convection on solar air dryers. The performance of natural and forced convection is compared. The maximum obtained tray temperatures were 72°C and 203°C, respectively, in natural and forced convection, and the moisture removed from red chillies were 64% and 78%. The drying rate and the system efficiency were 26.67 gm/hr and 57.45%, respectively. The maximum price to construct this dryer is Rs. 2,000, therefore, it can be an alternative to expensive dryers, allowing it to be used by local farmers.

Keywords: design; solar energy; solar dryer; moisture content; temperature; performance evaluation; efficiencies; natural circulation.

DOI: 10.1504/IJRET.2021.10040851

International Journal of Renewable Energy Technology, 2021 Vol.12 No.4, pp.301 - 317

Received: 19 Feb 2020
Accepted: 08 Jan 2021

Published online: 02 Sep 2021 *

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