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Thermal and Surface Radiosity Analysis of an Underfloor Heating System in a Bioclimatic Habitat

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  • Abdelkader Laafer

    (LSTM Laboratory, Department of Renewable Energy, Faculty of Technology, University of Blida 1, Soumâa Street No. 270, 09130 Blida, Algeria)

  • Djaffar Semmar

    (LSTM Laboratory, Department of Renewable Energy, Faculty of Technology, University of Blida 1, Soumâa Street No. 270, 09130 Blida, Algeria)

  • Abdelkader Hamid

    (LSTM Laboratory, Department of Renewable Energy, Faculty of Technology, University of Blida 1, Soumâa Street No. 270, 09130 Blida, Algeria)

  • Mahmoud Bourouis

    (Department of Mechanical Engineering, Universitat Rovira i Virgili, Av. Països Catalans No. 26, 43007 Tarragona, Spain)

Abstract

This paper addresses the modeling of convective and radiative heat transfer to achieve an acceptable level of indoor temperature. The results presented were obtained in a pilot project in which an energy-efficient house was built on a site located west of Algiers. The main objective was to perform a numerical simulation to investigate how the temperature of the heat-transfer fluid circulating in the floor heating system affected the temperature of the indoor air and also how surface radiosity affected the temperature profile of the indoor air. The study employed the finite element method integrated into the Comsol Multiphysics software. The model was validated using experimental data reported in the literature for the pilothouse at the same meteorological conditions. An error of about 2.32% was apparent between the experimental and theoretical results. Results showed that the increase of the heating transfer fluid temperature from 30 to 50 °C produced the same temperature of about 15.1 °C taken at a 50 cm height inside the room. The air temperature remained stable, with an insignificant variation after 72 h of heating. Surface radiosity increased as a function of time and reached an almost constant value of 380 W·m ?2 after 72 h because of the stability of the air temperature by convection.

Suggested Citation

  • Abdelkader Laafer & Djaffar Semmar & Abdelkader Hamid & Mahmoud Bourouis, 2021. "Thermal and Surface Radiosity Analysis of an Underfloor Heating System in a Bioclimatic Habitat," Energies, MDPI, vol. 14(13), pages 1-17, June.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:13:p:3880-:d:583677
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    References listed on IDEAS

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    4. Zhai, X.Q. & Yang, J.R. & Wang, R.Z., 2009. "Design and performance of the solar-powered floor heating system in a green building," Renewable Energy, Elsevier, vol. 34(7), pages 1700-1708.
    5. Zhao, Kang & Liu, Xiao-Hua & Jiang, Yi, 2016. "Application of radiant floor cooling in large space buildings – A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 55(C), pages 1083-1096.
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