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Effects of Inhomogeneities on Heat and Mass Transport Phenomena in Thermal Bridges

Author

Listed:
  • Paola Iodice

    (Università Telematica Pegaso, Centro Direzionale, Isola A3, 80143 Napoli, Italy)

  • Nicola Massarotti

    (Dipartimento di Ingegneria, Università degli Studi di Napoli “Parthenope”, Centro Direzionale, Isola C4, 80143 Napoli, Italy)

  • Alessandro Mauro

    (Dipartimento di Ingegneria, Università degli Studi di Napoli “Parthenope”, Centro Direzionale, Isola C4, 80143 Napoli, Italy)

Abstract

The interest of calculating the effects of thermal bridges in buildings energy consumption is growing, due to recent energy saving regulations applied in different countries. The widespread use of insulating materials to reduce energy requirements of buildings, often employed for intermediate insulation of the building envelope, makes thermal bridges a crucial point in the energy analysis of building envelopes. Furthermore, heat losses through thermal bridges often lead to building pathologies due to moisture condensation. Therefore, thermal bridges need to be correctly characterized in the building design stage in order to reduce heat losses and avoid materials degradation. The authors numerically simulate, by using finite elements, the steady-state and dynamic three-dimensional (3D) heat and vapor transport in inhomogeneous thermal bridges and building envelopes. The aim of the present work is to show the importance of taking into account the presence of inhomogeneities ( i.e. , metal stud) in building materials for the calculation of actual heat losses and water condensation in 3D thermal bridges. The obtained heat transfer results are verified against the reference data of the technical standard UNI EN ISO 10211. The proposed microscopic approach is essential to calculate the actual heat losses of three-dimensional thermal bridges and building envelopes and to overcome condensation problems.

Suggested Citation

  • Paola Iodice & Nicola Massarotti & Alessandro Mauro, 2016. "Effects of Inhomogeneities on Heat and Mass Transport Phenomena in Thermal Bridges," Energies, MDPI, vol. 9(3), pages 1-21, February.
  • Handle: RePEc:gam:jeners:v:9:y:2016:i:3:p:126-:d:64518
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    References listed on IDEAS

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    1. Francesco Colangelo & Giuseppina De Luca & Claudio Ferone & Alessandro Mauro, 2013. "Experimental and Numerical Analysis of Thermal and Hygrometric Characteristics of Building Structures Employing Recycled Plastic Aggregates and Geopolymer Concrete," Energies, MDPI, vol. 6(11), pages 1-25, November.
    2. He, Jiang & Hoyano, Akira & Asawa, Takashi, 2009. "A numerical simulation tool for predicting the impact of outdoor thermal environment on building energy performance," Applied Energy, Elsevier, vol. 86(9), pages 1596-1605, September.
    3. Nussbaumer, T. & Wakili, K. Ghazi & Tanner, Ch., 2006. "Experimental and numerical investigation of the thermal performance of a protected vacuum-insulation system applied to a concrete wall," Applied Energy, Elsevier, vol. 83(8), pages 841-855, August.
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    Cited by:

    1. Heegang Kim & Myoungsouk Yeo, 2020. "Thermal Bridge Modeling and a Dynamic Analysis Method Using the Analogy of a Steady-State Thermal Bridge Analysis and System Identification Process for Building Energy Simulation: Methodology and Vali," Energies, MDPI, vol. 13(17), pages 1-22, August.
    2. Anna Laura Pisello & Claudia Fabiani & Nastaran Makaremi & Veronica Lucia Castaldo & Gianluca Cavalaglio & Andrea Nicolini & Marco Barbanera & Franco Cotana, 2016. "Sustainable New Brick and Thermo-Acoustic Insulation Panel from Mineralization of Stranded Driftwood Residues," Energies, MDPI, vol. 9(8), pages 1-20, August.

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