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Numerical simulation and testing of a passive thermal solar collector on okra (hibiscus esculentus)

Author:

Karma Bako Rimamcwe and Chavan, U. D.

Subject Area:

Life Sciences

Abstract:

A flat plate collector, passive solar dryer with dimension 0.8m x 0.6m x 0.4m has been design and constructed with locally available materials such as plywood, aluminum surfaced roofing sheet lined on the inside, with the floor plate painted black as the black body. The black paint used has an absorbance of 0.96. A comparative test carried out on the drying Okra (Hibisicus esculentus) revealed an extent of 91% moisture removal by the solar cabinet drying and 86% for open air drying as against 89% literature standards. These methods are simple and illustrate the fact that constructions of efficient passive solar dryers are possible and achievable by our local users on a do-it-yourself basis, and this will minimize cost and over dependence on electricity for drying vegetables at home.

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