Evaluation the effectiveness of an indirect solar dryer under Aswan governorate conditions

Document Type : Original Research

Authors

1 الصدقة الجديدة

2 Department of Electrical Engineering, Faculty of Engineering, Aswan University, Aswan , Egypt

3 faculty of Agricultral Engineering Al azhar university Assuit Branch

4 Faculty of Agriculture and Natural Resources, Department of Agricultural Engineering and Biosystems, Aswan University

Abstract

This paper presents an evaluation of an indirect solar dryer consisting of a solar collector, trays located in the drying chamber, and an air outlet opening above the drying chamber. The solar collector consists of a Corrugated galvanized steel panel painted black and covered with sheets of transparent glass, 3 mm thick from the top, and with dimensions of 2400 x 1100 mm. The side walls of the solar collector are made of wood, are the insulation is thermal wool with a 50 mm thickness and are painted black from the outside. The drying room measures 1100 x 1200 mm, is made of wood, is thermally insulated from the inside, and contains a number of shelves. The solar dryer was tested with a load of henna leaves, it was exposed to solar radiation from 8:00 a.m. to 3:00 p.m. A leaves of henna drying test is used to evaluate solar dryers, with a maximum average temperature of 56.2°C for the load test. 3000 g of henna leaves were used in the load test to gauge how well the solar dryer worked. For the solar drying test, 3000 g of henna leaves were dried from a starting moisture content of 74% W.b to a final moisture content of 8.4% in 7 hours of sunlight. The drying rate was calculated to be 306.7 g/h for the load test. The drying efficiency was calculated to be 19.5%. The average collector efficiency was also discovered to be 79.7% for the load test.

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Aswan University Journal of Environmental Studies
Volume 4, Issue 5
December 2023
Pages 315-332

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