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Development and experimental validation of a transient 2D numeric model for radiant walls

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  • Romaní, Joaquim
  • Cabeza, Luisa F.
  • de Gracia, Alvaro

Abstract

An experimental set-up consisting of a house like cubicle exposed to outdoor weather was used to validate a numerical model of a radiant wall. The 2D transient finite volume model used as inputs the indoor temperature, outdoor temperature, global solar radiation incident on a vertical surface, and temperature and flow of the supply water. The simulation results closely agreed with the temperature profiles and heat fluxes for the three studied orientations (East, South, and West). Furthermore, a parametric study was carried out with the radiant wall model, concluding that pipes spacing between 125 mm and 150 mm and depth between 45 mm and 65 mm minimized the temperature difference on the surface while maximizing the heat flux. Furthermore, a control strategy with shorter activation periods improved the heat transfer efficiency.

Suggested Citation

  • Romaní, Joaquim & Cabeza, Luisa F. & de Gracia, Alvaro, 2018. "Development and experimental validation of a transient 2D numeric model for radiant walls," Renewable Energy, Elsevier, vol. 115(C), pages 859-870.
    • Handle: RePEc:eee:renene:v:115:y:2018:i:c:p:859-870
    DOI: 10.1016/j.renene.2017.08.019
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    References listed on IDEAS

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    1. Romaní, Joaquim & Pérez, Gabriel & de Gracia, Alvaro, 2017. "Experimental evaluation of a heating radiant wall coupled to a ground source heat pump," Renewable Energy, Elsevier, vol. 105(C), pages 520-529.
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    Cited by:

    1. María M. Villar-Ramos & Iván Hernández-Pérez & Karla M. Aguilar-Castro & Ivett Zavala-Guillén & Edgar V. Macias-Melo & Irving Hernández-López & Juan Serrano-Arellano, 2022. "A Review of Thermally Activated Building Systems (TABS) as an Alternative for Improving the Indoor Environment of Buildings," Energies, MDPI, vol. 15(17), pages 1-31, August.
    2. Giovanni Barone & Annamaria Buonomano & Cesare Forzano & Adolfo Palombo, 2019. "Building Energy Performance Analysis: An Experimental Validation of an In-House Dynamic Simulation Tool through a Real Test Room," Energies, MDPI, vol. 12(21), pages 1-39, October.
    3. Romaní, Joaquim & Belusko, Martin & Alemu, Alemu & Cabeza, Luisa F. & de Gracia, Alvaro & Bruno, Frank, 2018. "Optimization of deterministic controls for a cooling radiant wall coupled to a PV array," Applied Energy, Elsevier, vol. 229(C), pages 1103-1110.
    4. Heidenthaler, Daniel & Leeb, Markus & Schnabel, Thomas & Huber, Hermann, 2021. "Comparative analysis of thermally activated building systems in wooden and concrete structures regarding functionality and energy storage on a simulation-based approach," Energy, Elsevier, vol. 233(C).

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