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CFD Analysis of Convective Heat Transfer Coefficient on External Surfaces of Buildings

Author

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  • Andrea De Lieto Vollaro

    (Department of Ingegneria Astronautica, Elettrica ed Energetica, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy)

  • Giorgio Galli

    (Department of Ingegneria Astronautica, Elettrica ed Energetica, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy)

  • Andrea Vallati

    (Department of Ingegneria Astronautica, Elettrica ed Energetica, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy)

Abstract

Convective heat transfer coefficients for external building surfaces are essential in building energy simulation (BES) to calculate convective heat gains and losses from building facades and roofs to the environment. These coefficients are complex functions of: building geometry, building surroundings, local air flow patterns and temperature differences. A microclimatic analysis in a typical urban configuration, has been carried out using Ansys Fluent Version 14.0, an urban street canyon, with a given H/W ratio, has been considered to simulate a three-dimensional flow field and to calculate the thermal fluid dynamics parameters that characterize the street canyon. In this paper, the convective heat transfer coefficient values on the windward external façade of the canyon and on the windward and leeward inner walls are analyzed and a comparison with values from experimental and numerical correlations is carried out.

Suggested Citation

  • Andrea De Lieto Vollaro & Giorgio Galli & Andrea Vallati, 2015. "CFD Analysis of Convective Heat Transfer Coefficient on External Surfaces of Buildings," Sustainability, MDPI, vol. 7(7), pages 1-12, July.
    • Handle: RePEc:gam:jsusta:v:7:y:2015:i:7:p:9088-9099:d:52477
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    References listed on IDEAS

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    1. Łopata, Stanisław & Ocłoń, Paweł, 2015. "Numerical study of the effect of fouling on local heat transfer conditions in a high-temperature fin-and-tube heat exchanger," Energy, Elsevier, vol. 92(P1), pages 100-116.
    2. Andrea De Lieto Vollaro & Giuseppe De Simone & Roberto Romagnoli & Andrea Vallati & Simone Botillo, 2014. "Numerical Study of Urban Canyon Microclimate Related to Geometrical Parameters," Sustainability, MDPI, vol. 6(11), pages 1-12, November.
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    1. Gabriele Battista & Tiziano Pagliaroli & Luca Mauri & Carmine Basilicata & Roberto De Lieto Vollaro, 2016. "Assessment of the Air Pollution Level in the City of Rome (Italy)," Sustainability, MDPI, vol. 8(9), pages 1-15, August.
    2. Jiying Liu & Mohammad Heidarinejad & Saber Khoshdel Nikkho & Nicholas W. Mattise & Jelena Srebric, 2019. "Quantifying Impacts of Urban Microclimate on a Building Energy Consumption—A Case Study," Sustainability, MDPI, vol. 11(18), pages 1-21, September.
    3. Piotr Michalak, 2021. "Experimental and Theoretical Study on the Internal Convective and Radiative Heat Transfer Coefficients for a Vertical Wall in a Residential Building," Energies, MDPI, vol. 14(18), pages 1-22, September.
    4. Fabio Nardecchia & Benedetta Mattoni & Francesca Pagliaro & Lucia Cellucci & Fabio Bisegna & Franco Gugliermetti, 2016. "Computational Fluid Dynamic Modelling of Thermal Periodic Stabilized Regime in Passive Buildings," Sustainability, MDPI, vol. 8(11), pages 1-18, November.

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