Research Article Open Access

Thermal Efficiency of Double Pass Solar Collector with Longitudinal Fins Absorbers

Ahmad Fudholi1, Kamaruzzaman Sopian1, Mohd Hafidz Ruslan2, Mohd. Yusof Othman2 and Muhammad Yahya1
  • 1 ,
  • 2 , Afganistan
American Journal of Applied Sciences
Volume 8 No. 3, 2011, 254-260


Submitted On: 9 December 2010 Published On: 25 March 2011

How to Cite: Fudholi, A., Sopian, K., Ruslan, M. H., Othman, M. Y. & Yahya, M. (2011). Thermal Efficiency of Double Pass Solar Collector with Longitudinal Fins Absorbers. American Journal of Applied Sciences, 8(3), 254-260.


Problem statement: One of the most important components of a solar energy system is the solar collector. The performances of double-pass solar collector with longitudinal fins absorbers are analyzed. Approach: The study involves a theoretical study to investigate the effect of mass flow rate, number and height of fins on efficiency, which involves steady-state energy balance equations on the longitudinal fins absorber of solar collectors. The theoretical solution procedure of the energy equations uses a matrix inversion method and making some algebraic rearrangements. Results: The collector efficiency increases as the number and height of fins increases. For a mass flow rate 0.02- 0.1kg/s, the double-pass solar collectors are efficiency about 36-73% in upper fins (type I), 37-75% in lower fins (type II) and 46-74% in upper and lower fins (type III). Conclusion: The efficiency of the collector is strongly dependent on the flow rate, efficiency increase is about 35%.

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  • Double pass solar collector
  • fins absorbers
  • thermal efficiency
  • solar collector