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Climate responsive behaviour of heat pipe technology for enhanced passive airside cooling

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  • Chaudhry, Hassam Nasarullah
  • Hughes, Ben Richard

Abstract

A detailed investigation into determining the passive airside cooling capability of heat pipes in response to gradually varying external temperatures was carried out. The city of Doha, Qatar was taken as the location of case-study and the climatic data for June 21st, 2012 was incorporated in the transient thermal modelling. The physical domain comprised of 19 cylindrical heat pipes arranged in a staggered grid subjected to varying source temperatures. Wind tunnel testing was carried out for the duration of 24h in order to establish a relationship between the source temperatures and their effect on the climate responsive behaviour of heat pipes. Infrared thermal imaging was used to capture the surface temperature formations at regular intervals of time during the test. The findings from the study showed that under a low Reynolds Number airstream, the cooling capacity of heat pipes increases by 0.1°C for every 1°C rise in external source temperature. Conversely, the investigation showed that the thermal response of heat pipes reduces by 0.3°C when subjected to decreasing source temperature gradients of 1°C, thus indicating a low effectiveness. The highest temperature reduction was recorded at 2.3°C indicating a convective heat transfer of 1546W and a heat pipe effectiveness of 8.5%. The test confirmed that in general, the heat pipes performed better during the day-time when external temperatures reached over 40°C in comparison to night-time operation when external temperatures dropped below 35°C. The present work successfully characterised the sustainable operation of heat pipes in reducing air temperatures without the requirement of any mechanical intervention.

Suggested Citation

  • Chaudhry, Hassam Nasarullah & Hughes, Ben Richard, 2014. "Climate responsive behaviour of heat pipe technology for enhanced passive airside cooling," Applied Energy, Elsevier, vol. 136(C), pages 32-42.
    • Handle: RePEc:eee:appene:v:136:y:2014:i:c:p:32-42
    DOI: 10.1016/j.apenergy.2014.09.017
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    References listed on IDEAS

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    1. Chaudhry, Hassam Nasarullah & Hughes, Ben Richard & Ghani, Saud Abdul, 2012. "A review of heat pipe systems for heat recovery and renewable energy applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(4), pages 2249-2259.
    2. Calautit, John Kaiser & Chaudhry, Hassam Nasarullah & Hughes, Ben Richard & Ghani, Saud Abdul, 2013. "Comparison between evaporative cooling and a heat pipe assisted thermal loop for a commercial wind tower in hot and dry climatic conditions," Applied Energy, Elsevier, vol. 101(C), pages 740-755.
    3. Hughes, Ben Richard & Chaudhry, Hassam Nasarullah & Ghani, Saud Abdul, 2011. "A review of sustainable cooling technologies in buildings," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(6), pages 3112-3120, August.
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    Cited by:

    1. Zhang, L.Y. & Liu, Y.Y. & Guo, X. & Meng, X.Z. & Jin, L.W. & Zhang, Q.L. & Hu, W.J., 2017. "Experimental investigation and economic analysis of gravity heat pipe exchanger applied in communication base station," Applied Energy, Elsevier, vol. 194(C), pages 499-507.

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