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Experimental investigation of the effects of orientation angle on heat transfer performance of pin-finned surfaces in natural convection

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  • Sertkaya, Ahmet Ali
  • Bilir, Şefik
  • Kargıcı, Suna

Abstract

Natural convection heat transfer in air from a pin-finned surface is investigated experimentally by considering the effect of radiation heat transfer. The plate was oriented as the pin arrays facing either downwards or upwards from vertical axis with different angles and the experiments were performed for different values of heater power input. From the results of the experiments it is observed that the pin fins increase the heat transfer considerably when compared to the unpinned surface. The upfacing pins are more enhancing heat transfer than the downfacing pins and the enhancement is decreasing with increasing orientation angle from the vertical axis.

Suggested Citation

  • Sertkaya, Ahmet Ali & Bilir, Şefik & Kargıcı, Suna, 2011. "Experimental investigation of the effects of orientation angle on heat transfer performance of pin-finned surfaces in natural convection," Energy, Elsevier, vol. 36(3), pages 1513-1517.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:3:p:1513-1517
    DOI: 10.1016/j.energy.2011.01.014
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    References listed on IDEAS

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    1. Nwosu, Nwachukwu P., 2010. "Employing exergy-optimized pin fins in the design of an absorber in a solar air heater," Energy, Elsevier, vol. 35(2), pages 571-575.
    2. Di Stefano, Julian, 2000. "Energy efficiency and the environment: the potential for energy efficient lighting to save energy and reduce carbon dioxide emissions at Melbourne University, Australia," Energy, Elsevier, vol. 25(9), pages 823-839.
    3. Elshafei, E.A.M., 2010. "Natural convection heat transfer from a heat sink with hollow/perforated circular pin fins," Energy, Elsevier, vol. 35(7), pages 2870-2877.
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    Cited by:

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    2. Kundu, Balaram & Lee, Kwan-Soo, 2012. "Analytic solution for heat transfer of wet fins on account of all nonlinearity effects," Energy, Elsevier, vol. 41(1), pages 354-367.
    3. Uddin, Md. Jashim & Bég, O. Anwar & Uddin, Md. Nazir, 2016. "Energy conversion under conjugate conduction, magneto-convection, diffusion and nonlinear radiation over a non-linearly stretching sheet with slip and multiple convective boundary conditions," Energy, Elsevier, vol. 115(P1), pages 1119-1129.
    4. Basak, Tanmay & Anandalakshmi, R. & Kumar, Pushpendra & Roy, S., 2012. "Entropy generation vs energy flow due to natural convection in a trapezoidal cavity with isothermal and non-isothermal hot bottom wall," Energy, Elsevier, vol. 37(1), pages 514-532.
    5. Kundu, Balaram & Lee, Kwan-Soo, 2012. "A novel analysis for calculating the smallest envelope shape of wet fins with a nonlinear mode of surface transport," Energy, Elsevier, vol. 44(1), pages 527-543.
    6. Jang, Daeseok & Yook, Se-Jin & Lee, Kwan-Soo, 2014. "Optimum design of a radial heat sink with a fin-height profile for high-power LED lighting applications," Applied Energy, Elsevier, vol. 116(C), pages 260-268.
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    9. Hsiao, Kai-Long, 2013. "Energy conversion conjugate conduction–convection and radiation over non-linearly extrusion stretching sheet with physical multimedia effects," Energy, Elsevier, vol. 59(C), pages 494-502.
    10. Torabi, Mohsen & Aziz, Abdul & Zhang, Kaili, 2013. "A comparative study of longitudinal fins of rectangular, trapezoidal and concave parabolic profiles with multiple nonlinearities," Energy, Elsevier, vol. 51(C), pages 243-256.

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