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Numerical Simulation and Experimental Validation of Thermal Break Strips’ Improvement in Facade LSF Walls

Author

Listed:
  • Paulo Santos

    (ISISE, Department of Civil Engineering, University of Coimbra, Pólo II, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal)

  • Diogo Mateus

    (ISISE, Department of Civil Engineering, University of Coimbra, Pólo II, Rua Luís Reis Santos, 3030-788 Coimbra, Portugal)

  • Daniel Ferrandez

    (Department of Building Technology, Polytechnic University of Madrid, Avenida Juan de Herrera n.6, 28040 Madrid, Spain)

  • Amparo Verdu

    (Department of Building Technology, Polytechnic University of Madrid, Avenida Juan de Herrera n.6, 28040 Madrid, Spain)

Abstract

Thermal bridges may have a significant prejudicial impact on the thermal behavior and energy efficiency of buildings. Given the high thermal conductivity of steel, in Lightweight Steel Framed (LSF) buildings, this detrimental effect could be even greater. The use of thermal break (TB) strips is one of the most broadly implemented thermal bridge mitigation technics. In a previous study, the performance of TB strips in partition LSF walls was evaluated. However, a search of the literature found no similar experimental campaigns for facade LSF walls, which are even more relevant for a building’s overall energy efficiency since they are in direct contact with the external environmental conditions. In this article the thermal performance of ten facade LSF wall configurations were measured, using the heat flow meter (HFM) method. These measurements were compared to numerical simulation predictions, exhibiting excellent similarity and, consequently, high reliability. One reference wall, three TB strip locations in the steel stud flanges and three TB strip materials were assessed. The outer and inner TB strips showed quite similar thermal performances, but with slightly higher thermal resistance for outer TB strips (around +1%). Furthermore, the TB strips were clearly less efficient in facade LSF walls when compared to their thermal performance improvement in load-bearing partition LSF walls.

Suggested Citation

  • Paulo Santos & Diogo Mateus & Daniel Ferrandez & Amparo Verdu, 2022. "Numerical Simulation and Experimental Validation of Thermal Break Strips’ Improvement in Facade LSF Walls," Energies, MDPI, vol. 15(21), pages 1-18, November.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:21:p:8169-:d:960742
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    References listed on IDEAS

    as
    1. Paulo Santos & Keerthan Poologanathan, 2021. "The Importance of Stud Flanges Size and Shape on the Thermal Performance of Lightweight Steel Framed Walls," Sustainability, MDPI, vol. 13(7), pages 1-22, April.
    2. Paulo Santos & Telmo Ribeiro, 2021. "Thermal Performance Improvement of Double-Pane Lightweight Steel Framed Walls Using Thermal Break Strips and Reflective Foils," Energies, MDPI, vol. 14(21), pages 1-16, October.
    3. Paulo Santos & Gabriela Lemes & Diogo Mateus, 2020. "Analytical Methods to Estimate the Thermal Transmittance of LSF Walls: Calculation Procedures Review and Accuracy Comparison," Energies, MDPI, vol. 13(4), pages 1-27, February.
    4. Paulo Santos & Gabriela Lemes & Diogo Mateus, 2019. "Thermal Transmittance of Internal Partition and External Facade LSF Walls: A Parametric Study," Energies, MDPI, vol. 12(14), pages 1-20, July.
    Full references (including those not matched with items on IDEAS)

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    Cited by:

    1. Paulo Santos & Paulo Lopes & David Abrantes, 2022. "Thermal Performance of Load-Bearing, Lightweight, Steel-Framed Partition Walls Using Thermal Break Strips: A Parametric Study," Energies, MDPI, vol. 15(24), pages 1-16, December.
    2. Paulo Santos & Paulo Lopes & David Abrantes, 2023. "Thermal Performance of Lightweight Steel Framed Facade Walls Using Thermal Break Strips and ETICS: A Parametric Study," Energies, MDPI, vol. 16(4), pages 1-16, February.

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