An Experimental Investigation of the Energy and Exergy Efficiency of Extended Surface Solar Air Heaters

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2015 by IJETT Journal
Volume-21 Number-7
Year of Publication : 2015
Authors : Yusuf Bilgiç, Cengiz Yıldız
  10.14445/22315381/IJETT-V21P261

MLA 

Yusuf Bilgiç, Cengiz Yıldız"An Experimental Investigation of the Energy and Exergy Efficiency of Extended Surface Solar Air Heaters", International Journal of Engineering Trends and Technology (IJETT), V21(7),328-334 March 2015. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

Abstract

In this study, the energy and exergy efficiencies of newly developed four different solar air collectors have been investigated experimentally. The developed air heaters were compared with conventional type heaters. Solar air heaters with dimensions of 900 mm x1900 mm x170 mm have been used in the experiments. The experiments were carried out at mass flow rates of 0.02 kg/s , 0.04 kg/s and 0.06 kg/s. Collector outlet temperature, absorber surface temperature, glass door temperature, ambient temperature, solar radiation value and wind speeds were measured. Energy and exergy efficiencies have been calculated according to the data acquired from the experiments. It has been determined as a result of the experiments that the energy efficiency of the conventional type heater at a mass flow rate of 0.06 kg/s is %42, whereas that of Type-III is % 77.1 ; and that the exergy efficiency of the conventional system is mass flow rate of 0,02 kg/s is %8.31 whereas that of Type III is %30.32. It has been observed that the energy and exergy efficiencies of Type-III are higher in comparison with other types.

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Keywords
Solar Energy, Solar Air Heater, Solar air collector.