PERFORMANCE EVALUATION OF SWIRL FLOW SOLAR AIR HEATER | ||||
| Misr Journal of Agricultural Engineering | ||||
| Article 23, Volume 26, Issue 3, July 2009, Page 1429-1446 PDF (292.25 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjae.2009.108714 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Mahmoud. A. Kassem1; Mohamed. A. Kassem2 | ||||
| 1Mechanical Power Eng. Dept., Fac. of Eng., Cairo U., Cairo, Egypt. | ||||
| 2Ag. Eng. Dept., Fac. of Ag., Cairo U., Cairo, Egypt | ||||
| Abstract | ||||
| The objective of the present study is to evaluate the performance of a new design of solar air heater. In the new design, the air is swirled by using twisted-tape insert in the air passage. Initially, the heat transfer and pressure drop for swirled flow has been tested in order to identify the optimum tape twist ratio which satisfies a maximum heat transfer coefficient, with accepted value of air pressure drop. The proposed air heater was compared with the conventional air heater under the same operating conditions. The results show that the proposed air heater is superior - instantaneous and daily bases- in energy output, efficiency and exit-air temperature. | ||||
| Keywords | ||||
| Solar; Air heater; Performance; Twisted-tape; Enhancement | ||||
| References | ||||
|
Abdulla S. H., M. F. El-Refaie and M. A. Kassem. 2000. Theoretical study of fluidized solar collector performance. Proc Millennium Solar Forum, Sept. 17-22: 173-178. Mexico city. Mexico.
Abdulla, S. H. 1998. Theoretical and Experimental study of fluidized solar collector, M. Sc. Thesis, Mechanical Power Engineering Dept., CairoU., Cairo, Egypt.
Arind T., M. S. Sodha, A. Chandra and J. C. Joshi. 2006. Performance evaluation of photovoltaic thermal solar air collector for composite climate on India," Elsevier, J. Solar Energy materials & solar cells, 90: 175-189.
Date A. W. and J. R. Singham. 2002. Numerical prediction of friction and heat transfer characteristics of fully developed laminar flow in tubes containing twisted tapes," ASME Paper No. 72- HT-17, ASME, New York.
Duffi, J. A. and W. A. Beckman. 1974. Solar Energy, Thermal Processes. John wiley and Sons, New York, USA.
Elsayed, M. M., S. T. Ibrahim and A. S. Jaffar. 1986. Design of solar thermal systems, Scientific Pub. Center, KingAbdulazizUniversity. Jeddh. Kingdom of Saudi Arabia.
Hong S. W. and A. E. Bergles. 1976. Augmentation of Laminar Flow Heat Transfer in Tubes by Means of Twisted-Tape inserts. J. Heat transfer vol. 98, pp. 251-256.
Incropera, D. and B. Lavine. 2005. Fundamentals of heat and mass transfer Sixth edition, John Wiley & sons.
Jaisankar S., T. K. Radhakrishnan, K. N. Sheeba and S. Suresh. 2008. Experimental Studies on Heat Transfer and Friction Factor Characteristics of Thermosyhon Solar Water Heater System Fitted with Left-Right Twisted Tapes", International Journal of Applied Engineering Research, vol. 3.
James P. H. and F. I. Thomas. 2002. Advances in heat transfer Vol. 36 Academic press Elsevier Science, pp 183-286
Lertsatitthanakorn C., N. Khasee, S. Attajariyakul, S. Soponronnarit, A. Therdyothin and R. O. Suzuki, 2008. Performance Analysis of Double-pass Thermoelectric Solar Air Collector. Journal of Solar Energy materials and solar cells, Vol. 92 Issue 9, Sep. 2008, pp. 1105-1109.
Manglik R. M., and A. E. Bergles. 1993. Heat Transfer and Pressure drop Correlations for wisted-tape inserts in Isothermal Tubes. II. Transition and Turbulent Flows, J. Heat Transfer, vol. 115, pp. 890-896.
Irvane T. F. and J. P. Hartnett. 1970. Advances in heat transfer, Vol. 6, Academic Press, New York.
Raj M. M. and A. E. Bergles. 2002. Swirl flow heat transfer and pressure drop with twisted-tape inserts, James P. Hartnett and Thomas F. Irvine, Eds., Advances in heat transfer Vol. 36 Academic press Elsevier Science, pp 183-286.
Swapnil D. and G. N. Tiwari. 2008. Thermal modeling of combined system of photovoltaic thermal (PV/T) solar water heater, Journal of Solar Energy, Vol. 82, pp. 602-612.
Watcharin N., E. Smith and P. Pongjet. 2006. Effect of Twisted-tape Inserts on Heat Transfer in a Tube. Paper A-030, The 2nd Joint International Conference on " Sustainable Energy and Environmental SEE 2006" 21-23 November 2006, Bangkok, Thailand. | ||||
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