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Design, Construction and Testing of Simple Solar Maize Dryer

Author(s): Joshua FOLARANMI

Journal: Leonardo Electronic Journal of Practices and Technologies
ISSN 1583-1078

Volume: 7;
Issue: 13;
Start page: 122;
Date: 2008;
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Keywords: Solar Energy | Radiation | Airflow | Collector | Absorber Plate | Glass | Maize.

This project reports the design, construction and testing of a simple solar maize dryer. It is design in such a way that solar radiation is not incident directly on the maize, but preheated air warmed during its flow through a low pressure thermosphonic solar energy air heater or collector made up of an insulating material (polystyrene) of size 100mmx50mmx25.4mm, absorber plate (aluminium) sheet painted black of size 100mmx50mm and a cover glass (5mm thickness) measuring 100mmx50mm all arranged in this order contributed to the heating. The test results gave temperature above 45OC in the drying chamber, and the moisture content of 50kg of maize reduced to about 12.5% in three days of 9hours each day of drying.
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