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Optimizing the tilt angle of solar collectors

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  • Shariah, Adnan
  • Al-Akhras, M-Ali
  • Al-Omari, I.A.

Abstract

Solar collectors need to be tilted at the correct angle to maximize the performance of the system. In this paper, the annual solar fraction of the system (the fraction of energy that is supplied by solar energy) is used as an indicator to find the optimum inclination angles for a thermosyphon solar water heater installed in northern and southern parts of Jordan. Calculations are carried out using the powerful computer program TRNSYS (Transient System Simulation). The system is assumed to operate with a daily hot water load of 150 l at 55°C flowing during the day according to the widely used Rand consumption profile. The results show that the optimum inclination angle for the maximum solar fraction is about φ+(0→10°) for the northern region (represented by Amman) and about φ+(0→20°) for the southern region (represented by the town of Aqaba). These values are greater than those for maximum solar radiation (which is commonly used as an indicator) at the top of the collector by about 5 to 8°.

Suggested Citation

  • Shariah, Adnan & Al-Akhras, M-Ali & Al-Omari, I.A., 2002. "Optimizing the tilt angle of solar collectors," Renewable Energy, Elsevier, vol. 26(4), pages 587-598.
    • Handle: RePEc:eee:renene:v:26:y:2002:i:4:p:587-598
    DOI: 10.1016/S0960-1481(01)00106-9
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    References listed on IDEAS

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    1. Rousan, Akram A. & Shariah, Adnan, 1996. "Solar and thermal energy gain through windows in Jordan," Renewable Energy, Elsevier, vol. 7(3), pages 251-269.
    2. Morcos, V.H., 1994. "Optimum tilt angle and orientation for solar collectors in Assiut, Egypt," Renewable Energy, Elsevier, vol. 4(3), pages 291-298.
    3. Shariah, A.M. & Löf, G.O.G., 1996. "The optimization of tank-volume-to-collector-area ratio for a thermosyphon solar water heater," Renewable Energy, Elsevier, vol. 7(3), pages 289-300.
    4. Soulayman, S.Sh., 1991. "On the optimum tilt of solar absorber plates," Renewable Energy, Elsevier, vol. 1(3), pages 551-554.
    5. Shariah, Adnan & Shalabi, Bassam, 1997. "Optimal design for a thermosyphon solar water heater," Renewable Energy, Elsevier, vol. 11(3), pages 351-361.
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