Heat an Mass Transfer Processes and the Performance Evaluation in Single-Slope Solar Stills

[+] Author and Article Information
David A. Aderibigbe

University of Lagos, Mechanical Engineering Department Lagos, Lagos 01 Nigeria daader@gmail.com

1Corresponding author.

Contributed by the Solar Energy Division of ASME for publication in the Journal of Solar Energy Engineering. Manuscript received February 2, 2019; final manuscript received May 4, 2019; published online xx xx, xxxx. Assoc. Editor: Isaac Mahderekal.

ASME doi:10.1115/1.4043750 History: Received February 02, 2019; Accepted May 07, 2019


The paper reviews the present understanding of the analysis of the heat and mass transfer processes in single-slope solar stills. By using the results of published experiments, it is proposed that the heat and mass transfer phenomena from the basin water to the glass cover are coupled. This coupling makes it possible to derive the dependence of the heat transfer coefficient for condensation on the inclination of the glass cover of the still. The derived relation,

i.e.Nucon=0.738(Grcon.PrconSinß/Ja)14A1where A is the aspect ratio.
has been demonstrated to be an important expression for predicting the heat transfer coefficient for condensation, h con, necessary for a more realistic evaluation of the overall efficiency of single - slope solar still of a given cover angle, ß.

Copyright © 2019 by ASME
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