Method for Determining Overall Performances of Solar Kilns

[+] Author and Article Information
J. A. Guzman, A. Lauterbach, R. Jordan

Department of Chemical Engineering, Universidad Catolica de Chile, Casilla 6177, Santiago, Chile

J. Sol. Energy Eng 109(1), 26-29 (Feb 01, 1987) (4 pages) doi:10.1115/1.3268172 History: Received September 01, 1985; Online November 11, 2009


A theoretical model based on heat and mass transfer equations was developed for determining a reliable comparison between different solar kiln designs. It involves dividing the drying process into two sequential steps, one in which only heat transfer occurs and a second one in which the actual drying process takes place. The model gives an equation for determining the evaporated water in function of the normal drying variables, together with a specially defined parameter which gives account for the air recirculation inside the kiln. The model was validated experimentally for a box-type collector solar kiln operating under constant and falling rate drying periods. It was found that although the model could be applied satisfactorily, the tested design proved to be a very inefficient one, giving low values for the recirculating parameter.

Copyright © 1987 by ASME
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