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Experimental test of an innovative high concentration nanofluid solar collector

Author

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  • Colangelo, Gianpiero
  • Favale, Ernani
  • Miglietta, Paola
  • de Risi, Arturo
  • Milanese, Marco
  • Laforgia, Domenico

Abstract

In this study, a modified flat panel solar thermal collector was built and thermal efficiency was measured with two heat transfer fluids: distillated water and Al2O3–distillated water based nanofluid at high concentration (3.0%) volume fraction of solid phase. In this work for the first time nanofluid with high nanoparticle concentration has been used thanks to a modified solar thermal collector, based on patent WO2011138752 A1, which consists in bottom and top headers properly shaped in order to reduce sedimentation of clusters of nanoparticles. Thermal efficiency has been measured through an experimental setup, according to EN 12975-2 standard. Experimental results showed that an increase of thermal efficiency up to 11.7% compared to that measured with water has been obtained by using nanofluid. Besides effect of nanofluid on thermal efficiency is greater at high temperatures.

Suggested Citation

  • Colangelo, Gianpiero & Favale, Ernani & Miglietta, Paola & de Risi, Arturo & Milanese, Marco & Laforgia, Domenico, 2015. "Experimental test of an innovative high concentration nanofluid solar collector," Applied Energy, Elsevier, vol. 154(C), pages 874-881.
    • Handle: RePEc:eee:appene:v:154:y:2015:i:c:p:874-881
    DOI: 10.1016/j.apenergy.2015.05.031
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    References listed on IDEAS

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    1. Colangelo, Gianpiero & Favale, Ernani & de Risi, Arturo & Laforgia, Domenico, 2013. "A new solution for reduced sedimentation flat panel solar thermal collector using nanofluids," Applied Energy, Elsevier, vol. 111(C), pages 80-93.
    2. Kulkarni, Devdatta P. & Das, Debendra K. & Vajjha, Ravikanth S., 2009. "Application of nanofluids in heating buildings and reducing pollution," Applied Energy, Elsevier, vol. 86(12), pages 2566-2573, December.
    3. Lomascolo, Mauro & Colangelo, Gianpiero & Milanese, Marco & de Risi, Arturo, 2015. "Review of heat transfer in nanofluids: Conductive, convective and radiative experimental results," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 1182-1198.
    4. Colangelo, Gianpiero & Favale, Ernani & de Risi, Arturo & Laforgia, Domenico, 2012. "Results of experimental investigations on the heat conductivity of nanofluids based on diathermic oil for high temperature applications," Applied Energy, Elsevier, vol. 97(C), pages 828-833.
    5. Yousefi, Tooraj & Veysi, Farzad & Shojaeizadeh, Ehsan & Zinadini, Sirus, 2012. "An experimental investigation on the effect of Al2O3–H2O nanofluid on the efficiency of flat-plate solar collectors," Renewable Energy, Elsevier, vol. 39(1), pages 293-298.
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