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A new solution for reduced sedimentation flat panel solar thermal collector using nanofluids

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  • Colangelo, Gianpiero
  • Favale, Ernani
  • de Risi, Arturo
  • Laforgia, Domenico

Abstract

The present paper reports the experimental results and the potential performance of the investigation on flat solar thermal collectors using nanofluids as innovative heat transfer fluids for solar energy applications. The straight use of heat-transfer nanofluids in traditional solar flat panel revealed some technical issues, due to the nanoparticles sedimentation. Therefore, sedimentation has been investigated both in standard solar flat panels and modified ones made from transparent tubes. The results of the first tests showed that the main sedimentation parameter is the flow velocity and to better control it a standard flat panel was modified changing the cross-section of the lower and top header of the panel, that have been tapered to keep constant the fluid axial velocity. The modification of the panel shape (patent pending) enabled a negligible particles deposit.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:appene:v:111:y:2013:i:c:p:80-93
    DOI: 10.1016/j.apenergy.2013.04.069
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    References listed on IDEAS

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    1. 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.
    2. Lin, Cherng-Yuan & Wang, Jung-Chang & Chen, Teng-Chieh, 2011. "Analysis of suspension and heat transfer characteristics of Al2O3 nanofluids prepared through ultrasonic vibration," Applied Energy, Elsevier, vol. 88(12), pages 4527-4533.
    3. 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.
    4. Mo, Songping & Chen, Ying & Jia, Lisi & Luo, Xianglong, 2012. "Investigation on crystallization of TiO2–water nanofluids and deionized water," Applied Energy, Elsevier, vol. 93(C), pages 65-70.
    5. Aladag, Bahadir & Halelfadl, Salma & Doner, Nimeti & Maré, Thierry & Duret, Steven & Estellé, Patrice, 2012. "Experimental investigations of the viscosity of nanofluids at low temperatures," Applied Energy, Elsevier, vol. 97(C), pages 876-880.
    6. 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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