THERMAL PERFORMANCE TEST OF EVACUATED TUBE AND FLAT PLATE SOLAR COLLECTORS UNDER CLIMATIC CONDITIONS OF EGYPT | ||
| Misr Journal of Agricultural Engineering | ||
| Article 19, Volume 32, Issue 4, October 2015, Pages 1717-1736 PDF (1.27 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/mjae.2015.97858 | ||
| Author | ||
| M. R. Darwesh | ||
| Lecturer, Ag. Eng. Dept., Fac. of Ag., Tanta Univ., Egypt. | ||
| Abstract | ||
| The main objective of the present study is to evaluate the thermal performance of two different solar collectors; evacuated tube collector (ETC) and flat plate (FPC) operated by thermo-siphon phenomenon. This study carried out on the roof of Agriculture faculty, Tanta University (latitude angle of 30.5ºN, longitude angle of 30.6ºE). FPC and ETC are tested using two different tilt angles (30.5° and 45.3°) and stationary non-tracking. The obtained results revealed that the tilt angle was the most important parameter affection solar collector's thermal performance. The data also showed that, the solar energy available and absorbed solar energy for the FPC were higher than the ETC. Meanwhile, the useful heat gain to storage and overall thermal efficiency for the ETC were higher than that for the FPC. The maximum overall thermal efficiency for the two solar collectors (ETC and FPC), respectively, were 77% and 71.3% which achieved at noon with tilt angle of 45.3° during March month. The difference in thermal performance between the two solar collectors can be attributed almost completely to the absorption efficiency and its effect on overall thermal efficiency. In general, the overall thermal efficiency with 45.3° tilt angle gave was higher values than that with 30.5° tilt angle during winter months due to the solar altitude angle. | ||
| References | ||
|
Abdellatif, S.; N. Elashmawy and A. Kassem (2009) "Optimum tilt angle and orientation for a flat plate solar water heater under Egyptian conditions" AMA Journal, 40(3): 73-77
Ayompe, L.M.; A. Duffy; M. McKeever; M. Conlon and S. J. McCormack (2011) "Comparative field performance study of flat plate and heat pipe evacuated tube collectors (ETCs) for domestic water heating systems in a temperate climate". Energy, 36: 3370-3378.
Budiharjo, I. G and G. L. Morrison (2009) "Performance of water – in-glass evacuated tube solar water haters" Solar Energy, 83:49-56
Dabra, V.; L. Yadav and A. Yadav (2013) "The effect of tilt angle on the performance of evacuated tube solar air collector: experimental analysis. Internacional Journal of Engineering, Science and Technology, 5(4): 100-110
Duffie, J. A and W. Beckman (2006) "Solar engineering of thermal processes" J. Wiely and Sons
Gunerhan, H. and A. Hepbasli (2007) "Exergetic modeling and performance evaluation of solar water heating systems for building applications" Energy and Buildings, 39(5): 509-516
Hayek, M.; J. Assaf and W. Lteif (2011) "Experimental investigation of the performance of evacuated tube solar collectors under Eastern Mediterranean climatic conditions" Energy Procedia, 6: 618 - 626
Kalogirous, S. A. (2003) "The potential od solar industrial process heat. Applications" Applied Energy, 76: 337-361.
Kalogirou, S. A. (2004) "Environmental benefits of domestic solar energy systems" Energy Conversion and Management, 45 (18-19): 3075 – 309
Kasaeian, A.; A. Mohammad Karim and A. Kaabinejadian (2014) "Performance investigation of solar evacuated tube collector using TRNSYS in Tehran" International Journal of Renewable Energy Research, 4(2): 497-503
Ogueke. N. V.; E. Anyanwu and O. V. Ekechukwu (2009) "A review of solar water heating systems" Journal of Renewable and sustainable Energy, 1, 043016
Ogie, N. A.; I. Oghogho and J. Jesumirewhe (2013) "Design and constructing of a solar water heater based on thermosyphon principle" Journal of Fundamentals of Renewable Energy and Applications 3: Article ID 235592, 8 pages.
Pluta, Z. (2011) "Evacuated tubular or classical flat plate solar collector?. Journal of Power Technologies, 91(3): 158-160.
Selvakumar, P.; and P. Somasundaram (2012) "Effect of inclination angle on temperature characteristics of water-in-glass evacuated tubes of domestic solar water heater" International Journal of Engineering and Innovative Technology (IJEII), 1(4):78-81.
Tang, R.; Y. Yang; and W. Goo (2011) "Comparative studies on thermal performance of water-in-glass evacuated tube solar water heaters with different collector tilt- angles" Solar Energy, 85: 1381-1385
Xiaoww, W and H. Ben (2005) "Exergy analysis of domestic- scale solar water heaters" Renewable and Sustainable Energy Reviews, 9 (6): 638-645 | ||
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