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Experimental investigation of three different solar air heaters: Energy and exergy analyses

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  • Alta, Deniz
  • Bilgili, Emin
  • Ertekin, C.
  • Yaldiz, Osman

Abstract

The present study aims to compare three different types of designed flat-plate solar air heaters, two having fins (Type II and Type III) and the other without fins (Type I), one of the heater with a fin had single glass cover (Type III) and the others had double glass covers (Type I and Type II). The energy and exergy output rates of the solar air heaters were evaluated for various air flow rates (25, 50 and 100 m3/m2 h), tilt angle (0°, 15° and 30°) and temperature conditions versus time. Based on the energy and exergy output rates, heater with double glass covers and fins (Type II) is more effective and the difference between the input and output air temperature is higher than of the others. Besides, it is found that the circulation time of air inside the heater played a role more important than of the number of transparent sheet. Lower air flow rates should be preferred in the applications of which temperature differences is more important.

Suggested Citation

  • Alta, Deniz & Bilgili, Emin & Ertekin, C. & Yaldiz, Osman, 2010. "Experimental investigation of three different solar air heaters: Energy and exergy analyses," Applied Energy, Elsevier, vol. 87(10), pages 2953-2973, October.
    • Handle: RePEc:eee:appene:v:87:y:2010:i:10:p:2953-2973
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    References listed on IDEAS

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