THERMAL SCIENCE

International Scientific Journal

Authors of this Paper

External Links

Shailendra Kumar Shukla

,

Ajeet Kumar Rai

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
solar distillation, solar energy, purification of brackish-saline water
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 Issue 3, PAGES [139 - 152]
REFERENCES
  1. Dunkle, R.V., Solar Water Distillation: The Roof of Type Still and Multiple Effect Diffusion Still, International Developments in Heat Transfer, ASME, Proceedings International Heat Transfer, University of Colorado, Boulder, Col., USA, 1961, part V, pp. 895-902
  2. Löf, G. O. G., Eibling, J. A., Bloemer, J. W., Energy Balances in Solar Distillation, J. Am. Inst. Chem. Eng. 7 (1961), 4, pp. 641-649
  3. Morse, R. N., Read, W. R. W., A Rational Basis for the Engineering Development of the Solar Still, Solar Energy, 12 (1968), 1, pp. 5-17
  4. Kumar, S., Tiwari, G. N., Estimation of Convective Mass Transfer in Solar Distillation System, Solar Energy, 57 (1996), 6, pp. 459-464
  5. Sharma, V. B., Mullick, S. C., Estimation of Heat Transfer Coefficients, the Upward Heat Flow and Evaporation in a Solar Still, J. Solar Energy Eng., Trans. ASME, 113 (1991), 1, pp. 36-41
  6. Nawayseh, N. K., et al., Solar Desalination Based Humidification process: I - Evaluating the Heat and Mass Transfer Coefficients, Energy Conversion and Management, 40 (1999), 13, pp. 1423-1439
  7. Ruthkosky, M., et al., Convective Mass Transfer in Double Condensing Chamber and a Conventional Solar Still, Desalination, 115 (1998), 2, pp. 181-188
  8. Shruti, A., Tiwari, G. N.,Thermal Modeling of a Double Condensing Chamber Solar Still, An Experimental Validation, Energy Conversion and Management, 40 (1999), 19, pp. 7-114
  9. Shukla, S. K., Sorayan, V. P. S., Thermal Modelling of Solar Stills; an Experimental Validation, Renewable Energy, 30 (2005), 5, pp. 683-699
  10. Duffie, J., Backman,W. A., Solar Engineering of Thermal Processes, John Wiley and Sons, New York, USA, 1980
  11. Malik, M. A. S, et al., Solar Distillation, Pergamon Press Ltd., Oxford, UK, 1982
PDF VERSION [DOWNLOAD]
Analytical thermal modeling of double slope solar still by using inner glass cover temperature

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, 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