THERMAL SCIENCE

International Scientific Journal

Thermal Science - Online First

online first only

Performance comparison of aboveground and underground solar ponds

ABSTRACT
This paper deals with the modeling of two different solar ponds which has some different structural parameters such as aboveground and underground, and its performance evaluation. The solar pond system generally consists of three zones, and the densities of these zones decrease from the bottom of the pond to the surface. The most significant decrease in the density distribution of the salt between bottom and up of the pond is the gradient zone. The convective heat loss in the solar pond is prevented with this zone. In this study, aboveground and underground solar ponds were modeled at the same dimensions, but different structural parameters in the same conditions. In this model, the temperature distributions of the solar pond were obtained during a year. The thermal performances of the solar pond were calculated and the results were compared with an experiment. This study shows that the efficiency of the aboveground solar pond is observed to be a maximum of 25.93% in July, a minimum of 4.53% in January. Furthermore, the efficiency of the underground solar pond is observed to be a maximum of 21.49% in July, a minimum of 6.55% in January. This study indicates that the underground construction of solar ponds, designed to be insulated using appropriate insulation materials, is found to be more efficient with respect to the aboveground pond.
KEYWORDS
PAPER SUBMITTED: 2016-06-13
PAPER REVISED: 2016-09-26
PAPER ACCEPTED: 2016-10-11
PUBLISHED ONLINE: 2016-11-06
DOI REFERENCE: https://doi.org/10.2298/TSCI160613269S
REFERENCES
  1. Kalogirou, S.A., Solar Energy Engineering Processes and Systems, 1st Edition, Cyprus University of Technology, ISBN 13:978-0-12-374501-9, 2009
  2. El-Sebaii, A.A., Ramadan, M.R.I., Aboul-Enein, S., Khallaf, A.M., History of the Solar Ponds: A Review Study, Renewable and Sustainable Energy Reviews, 15 (2011), pp. 3319-3325
  3. Boudhiaf, R., Baccar, M., Transient Hydrodynamic, Heat and Mass Transfer in a Salinity Gradient Solar Pond: A Numerical Study, Energy Conversion and Management, 79 (2014), pp. 568-580
  4. Karakilcik, M., Kıymac, K., Dincer, I., Experimental and Theoretical Temperature Distributions in a Solar Pond, International Journal of Heat and Mass Transfer, 49 (2006), pp. 825-835
  5. Karakilcik, M., Dincer, I., Rosen, M.A., Performance Investigation of a Solar Pond, Applied Thermal Engineering, 26 (2006), pp. 727-735
  6. Karakilcik, M., Dincer, I., Exergetic Performance Analysis of a Solar Pond, International Journal of Thermal Science, 47 (2008), pp. 93-102
  7. Karakilcik, M., Bozkurt, I., Dincer, I., Dynamic Exergetic Performance Assessment of an Integrated Solar Pond, International Journal of Exergy, 12 (2013), pp. 70-86
  8. Karakilcik, M., Dincer, I., Bozkurt, I., Atiz, A., Performance Assessment of a Solar Pond with and without Shading Effect, Energy Conversion and Management, 65 (2013), pp. 98-107
  9. Bozkurt, I. and Karakilcik, M., The Daily Performance of a Solar Pond Integrated with Solar Collectors, Solar Energy, 86 (2012), pp. 1611-1620
  10. Bozkurt, I., Karakilcik, M., Dincer, I., Atiz, A., Transparent Covers Effect on the Performance of a Cylindrical Solar Pond, International Journal of Green Energy, 11 (2014), pp. 404-416
  11. Bozkurt, I., Karakilcik, M., Dincer, I., Energy Efficiency Assessment of Integrated and Nonintegrated Solar Ponds, International Journal of Low-Carbon Technologies, 9 (2014), pp. 45-51
  12. Bozkurt, I. and Karakilcik, M., The Effect of Sunny Area Ratios on the Thermal Performance of Solar Ponds, Energy Conversion and Management, 91 (2015), pp. 323-332
  13. Bozkurt, I. and Karakilcik, M., Exergy Analysis of a Solar Pond Integrated with Solar Collector, Solar Energy, 11 (2015), pp. 2282-289
  14. Bozkurt, I., Deniz, S., Karakilcik, M., Dincer, I., Performance Assessment of a Magnesium Chloride Saturated Solar Pond, Renewable Energy, 78 (2015), pp. 35-41
  15. Bozkurt, I., Mantar, S., Karakilcik, M., A New Performance Model to Determine Energy Storage Efficiencies of a Solar Pond, Heat Mass Transfer, 51 (2015), pp. 39-48
  16. Bezir, N.C., Donmez, O., Kayali, R., Ozek N., Numerical and Experimental Analysis of a Salt Gradient Solar Pond Performance with or without Reflective Covered Surface, Applied Energy, 85 (2008), pp. 1102-1112
  17. Nie, Z., Bu, L., Zheng, M., Huang, W., Experimental Study of Natural Brine Solar Ponds in Tibet, Solar Energy, 85 (2011), pp. 1537-1542
  18. Kayali, R., Bozdemir, S., Kiymac, K., A Rectangular Solar Pond Model Incorporating Empirical Functions for Air and Soil Temperatures, Solar Energy, 63 (1998), 345-353
  19. Kumar, A., Kishore, V.V.N., Construction and Operational Experience of a 6000 m2 Solar Pond at Kutch, India, Solar Energy, 65 (1999), pp. 237-249
  20. Saleh, A., Qudeiri, J.A., Al-Nimr, M.A., Performance Investigation of a Salt Gradient Solar Pond Coupled with Desalination Facility Near the Dead Sea, Energy, 36 (2011), pp. 922-931
  21. Bernad, F., Casas, S., Gibert, O., Akbarzadeh, A., Cortina, J.L., Valderrama, C., Salinity Gradient Solar Pond: Validation and Simulation Model, Solar Energy, 98 (2013), pp. 366-374
  22. Akbarzadeh, A., Johnson, P., Singh, R., Examining Potential Benefits of Combining a Chimney with a Salinity Gradient Solar Pond for Production of Power in Salt Affected Areas', Solar Energy, 83 (2009), pp. 1345-1359
  23. Ranjan, K.R., Kaushik, S.C., Panwar, N.L., Energy and Exergy Analyses of Solar Ponds in the Indian Climatic Conditions, International Journal of Exergy, 15 (2014), pp. 121-151
  24. Bird, R.B., Stewart, W.E., Lightfoot, E.N., Transport Phenomena, 2nd ed., John Wiley & Sons, 2007
  25. Modest, M.F., Radiative Heat Transfer, 2nd ed., Academic Press, San Diego, California, 2003
  26. Fiveland, W.A., The Selection of Discrete Ordinate Quadrature Sets for Anisotropic Scattering, Fundamentals of Radiation Transfer, ASME, 1991
  27. Duffie J.A., Beckman, W.A., Solar Engineering of Thermal Processes, 4th Edition, John Wiley & Sons, Inc. Published, 2013
  28. Bryant, H.C. and Colbeck, I., A Solar Pond for London, Solar Energy, 19 (1977), pp. 321-322