AN ENERGY AND EXERGY STUDY OF A SOLAR THERMAL AIR COLLECTOR

Abstract

A solar flat plate air collector was manufactured in the north of Iran, and connected to a room as the model to study the possibility of using such solar heating systems in the northern parts of Iran. This collector was tested as a solar air heater to see how good it could be for warming up the test room during the winter. The experimental data obtained through accurate measurements were analyzed using second law approach to find the optimum mass flow rate, which leads to the maximum exergy efficiency. It was found that for the test setup at the test location, a mass flow rate of 0.0011 kg/s is the optimum mass flow rate for tested conditions which leads to the highest second law efficiency.

Keywords

Dates

  • Submission Date2008-09-06
  • Revision Date2008-11-19
  • Acceptance Date2008-12-26

DOI Reference

10.2298/TSCI0901205M

References

  1. Perrot, P., A to Z of Thermodynamics, Oxford University Press, Oxford, UK, 1998
  2. Rant, Z., Exergy, a New Word for Technical Available Work (in German), Forschung auf dem Gebiete des Ingenieurwesens, 22 (1956), pp. 36-37
  3. Gibbs, J. W., A Method of Geometrical Representation of Thermodynamic Properties of Substances by Means of Surfaces: Reprinted in Gibbs, Collected Works (Eds. W. R. Longley, R. G. Van Name), Transactions of the Connecticut Academy of Arts and Sciences, 2 (1931), pp. 382-404
  4. Moran, M. J., Shapiro, H. N., Fundamentals of Engineering Thermodynamics, 6th ed., John Wiley and Sons, New York, USA, 2007
  5. Van Wylen, G. J., Thermodynamics, John Wiley and Sons, New York, USA, 1991
  6. Wark, J. K., Advanced Thermodynamics for Engineers, McGraw-Hill, New York, USA, 1995
  7. Bejan, A., Advanced Engineering Thermodynamics, 2nd ed., John Wiley and Sons, New York, USA, 1997
  8. Saravan, M., Saravan, R., Renganarayanan, S., Energy and Exergy Analysis of Counter Flow Wet Cooling Towers, Thermal Science, 12 (2008), 2, pp. 69-78
  9. Bejan, A., Kearney, D. W., Kreith, F., Second Law Analysis and Synthesis of Solar Collector Systems, Journal of Solar Energy Engineering, 103 (1981), 1, pp. 23-28
  10. Bejan, A., Entropy Generation Minimization, CRC Press, Boca Raton, Fla., USA, 1996
  11. Londono-Hurtado, A., Rivera-Alvarez, A., Maximization of Exergy Output from Volumetric Absorption Solar Collectors, Journal of Solar Energy Engineering , 125 (2003), 1, pp. 83-86
  12. Luminosu, I., Fara, L., Thermodynamic Analysis of an Air Solar Collector, International Journal of Exergy, 2 (2005), 4, pp. 385-408
  13. Altfeld, K,. Leiner, W., Fiebig, M., Second Law Optimization of Flat-Plate Solar Air Heaters, Part I: The Concept of Net Exergy Flow and the Modeling of Solar Air Heaters, Solar Energy, 41 (1988), 2, pp. 127-132
  14. Altfeld, K., Leiner, W., Fiebig, M., Second Law Optimization of Flat-Plate Solar Air Heaters, Part 2: Results of Optimization and Analysis of Sensibility to Variations of Operating Conditions, Solar Energy, 41 (1988), 4 , pp. 309-317
  15. Torres-Reyes, E., et al., Optimal Process of Solar to Thermal Energy Conversion and Design of Irreversible Flat-Plate Solar Collectors, Energy 28 (2003), 2, pp. 99-113
  16. Kurtbas, I., Durmus, A., Efficiency and Exergy Analysis of a New Solar Air Heater, Renewable Energy, 29 (2004), 9, pp. 1489-1501
  17. Ajam, H., Farahat, S., Sarhaddi, F., Exergetic Optimization of Solar Air Heaters and Comparison with Energy Analysis, International Journal of Thermodynamics, 8 (2005), 4, pp. 183-190
  18. Ucar, M. I., Thermal and Exergy Analysis of Solar Air Collectors with Passive Augmentation Techniques, International Communications in Heat and Mass Transfer, 33 (2006), 10, pp. 1281-1290
  19. Esen, H., Experimental Energy and Exergy Analysis of a Double-Flow Solar Air Heater Having Different Obstacles on Absorber Plates, Building and Environment, 43 (2008), 6, pp. 1046-1054
  20. Gupta, M. K., Kaushik, S. C., Exergetic Performance Evaluation and Parametric Studies of Solar Air Heater, Energy, 33 (2008), 11, pp. 1691-1702
  21. Fujiwara, M., Exergy Analysis for the Performance of Solar Collectors, Journal of Solar Energy Engineering, 105 (1983), 2, pp. 163-167
  22. Xiaowu, W., Ben, H., Exergy Analysis of Domestic-Scale Solar Water Heaters, Renewable and Sustainable Energy Reviews, 9 (2005), 6, pp. 638-645
  23. Mohseni-Languri, E., Experimental and Dynamic Numerical Investigation on a Solar Air Heater, Thesis, Technical University of Noshiravani, Babol, Iran, 2007
  24. Duffie, J. A, Beckman, W. A, Solar Engineering of Thermal Processes, 2nd ed., John Wiley and Sons, New York, USA, 1991
Volume 13, Issue 1, Pages205 -216