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ANALYTICAL THERMAL MODELING OF DOUBLE SLOPE SOLAR STILL BY USING INNER GLASS COVER TEMPERATURE

ABSTRACT
In this paper, expressions for water and glass temperatures, hourly yield and instantaneous efficiency for double slope solar distillation systems have been derived analytically. The analysis is based on the basic energy balance for the systems. A thermal model has been developed to predict the performance of the still based on both, the inner and the outer glass temperatures of the solar still. In the present work two sets of values of C and n of internal heat and mass transfer coefficients, obtained from the experimental data under Indian climatic conditions, have been used. It is concluded that (1) there is a significant effect of operating temperature range on the internal heat transfer coefficients and (2) by considering the inner glass cover temperature there is reasonable agreement between the experimental and predicted theoretical results.
KEYWORDS
PAPER SUBMITTED: 2007-12-12
PAPER REVISED: 2008-04-14
PAPER ACCEPTED: 2008-07-05
DOI REFERENCE: https://doi.org/10.2298/TSCI0803139S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2008, VOLUME 12, ISSUE 3, PAGES [139 - 152]
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© 2019 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence