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Analysis of distributed thermal management policy for energy-efficient processing of materials by natural convection

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  • Kaluri, Ram Satish
  • Basak, Tanmay

Abstract

Natural convection is the governing phenomena in many material processing applications. The conventional method of uniform heating at the bottom wall of an enclosure may result in inadequate thermal mixing and poor temperature distribution leading energy wastage. In this work, an alternative, energy-efficient method of distributed heating of the cavity is studied and compared with the isothermal bottom wall heating case in enhancing the thermal mixing and improving the temperature distribution in the cavity. Steady laminar natural convection of various fluids of industrial importance (Pr=0.015, 07, 10, 1000) in the range of Ra=103–105 is studied in a differentially heated cavity and in two cases of discretely heated square cavities. Detailed analysis is carried out by visualizing the heat flow by heatlines. The thermal mixing and temperature uniformity in each case are quantified in terms of cup-mixing temperature and root-mean square deviation (RMSD), respectively. It is found that thermal management policy of distributed heating significantly influences the thermal mixing and temperature uniformity in the enclosures. In a case with multiple discrete heat sources, a remarkable uniformity in temperature across the cavity is achieved with moderate thermal mixing.

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  • Kaluri, Ram Satish & Basak, Tanmay, 2010. "Analysis of distributed thermal management policy for energy-efficient processing of materials by natural convection," Energy, Elsevier, vol. 35(12), pages 5093-5107.
    • Handle: RePEc:eee:energy:v:35:y:2010:i:12:p:5093-5107
    DOI: 10.1016/j.energy.2010.08.006
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    Cited by:

    1. Biswal, Pratibha & Basak, Tanmay, 2014. "Bejan's heatlines and numerical visualization of convective heat flow in differentially heated enclosures with concave/convex side walls," Energy, Elsevier, vol. 64(C), pages 69-94.
    2. Saidi, Majid & Karimi, Gholamreza, 2014. "Free convection cooling in modified L-shape enclosures using copper–water nanofluid," Energy, Elsevier, vol. 70(C), pages 251-271.
    3. Das, Debayan & Lukose, Leo & Basak, Tanmay, 2018. "Role of multiple solar heaters along the walls for the thermal management during natural convection in square and triangular cavities," Renewable Energy, Elsevier, vol. 121(C), pages 205-229.
    4. Liu, Di & Zhao, Fu-Yun & Wang, Han-Qing, 2011. "Passive heat and moisture removal from a natural vented enclosure with a massive wall," Energy, Elsevier, vol. 36(5), pages 2867-2882.

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