Underfloor Air Cavity Created from Special Shaped Units and Different Intensity of Outdoor Wind Flow

Abstract:

Underfloor air cavities are commonly used in connection with remedial treatments of damp masonry, especially in historic buildings, but in new buildings respectively, and further also by the realization of foundation boards, and as a protection against radon. The materials used can be original, but it is also possible to use modern special shaped units. To assessment the airflow in the air cavity the recently often used CFD simulations can be employed. The application of simple geometric models can accurately confirm or refute the appropriateness of a proposed solution. Of the two completed simulations, the first overall geometry of a modeled house, ascertains the actual pressure on the walls due to wind effects. Results from the first simulation are applied as boundary conditions, where the geometric model represents the underfloor air cavity created from special shaped units. The overall geometric models are simulated by a different intensity of outdoor wind flow.

• Periodical: Advanced Materials Research (Volume 1041)
• Pages: 200-205
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1041.200
• Online since: October 2014
• Authors: Tomáš Renčko*, Anna Sedláková
• Keywords: CFD Simulation, Special Shaped Unit, Underfloor Ventilation, Wind Flow

References

[1] M. Benža et al: Folk architecture and urban planning of rural settlements in Slovakia. Academic Electronic Press, s. r. o. for National Conservation and Landscape Center, Slovak Republic, 1998, p.360. 80-88880-23-8.

[2] J. Lacika: 1000 religious monuments in Slovakia. The most beautiful religious buildings. Ikar, Slovakia, 2012, ISBN: 9788055128528.

[3] M. Björling, H. Stymne, C.A. Boman: The Indoor Climate of a Naturally Ventilated Church. Proceedings of Healthy Buildings 2009, USA, (2009).

[4] E. Arumägi, T. Kalamees, T. Broström: Indoor climate in a naturally ventilated unheated medieval church in Harju-Risti, Estonia. 10th REHVA World congress Clima, Turkey, (2010).

[5] A.S. Hussein, H. El-Shishiny: Influences of wind flow over heritage sites: a case study of the wind environment over the Giza Plateau in Egypt. Environ. Modell. Softw. 24 (3), 389-410, (2009).

DOI: 10.1016/j.envsoft.2008.08.002

[6] F. Monforti, R. Bellasio, R. Bianconi, G. Clai, G. Zanini: An evaluation of particle deposition fluxes to cultural heritage sites in Florence, Italy. Sci. Total Environ. 334-335, 61-72, (2004).

DOI: 10.1016/j.scitotenv.2004.04.030

[7] H. -J. Steeman, M. Van Belleghem, A. Janssens, M. De Paepe: Coupled simulation o heat and moisture transport in air and porous materials for the assessment of moisture related damage. Build. Environ. 44 (10), 2176-2184, (2009).

DOI: 10.1016/j.buildenv.2009.03.016

[8] M. Kalousek, O. Šikula: CFD simulation of ventilated air cavity. Building Simulation and Environmental Engineering 2008, 5. conference, Czech Republic, (2008).

[9] T. Renčko: Theoretically justified structural restoration of historic buildings. Dissertation work. Košice: Technical University in Košice, Civil Engineering Faculty, (2013).

[10] STN 73 0540-2. Thermal protection of buildings. Thermal performance of buildings and components. Part 2: Functional requirements. (2012).

[11] STN 73 0540-3. Thermal protection of buildings. Thermal performance of buildings and components. Part 3: Properties of environments and building products. (2012).

[12] STN EN ISO 13790/NA. Energy performance of buildings. Calculation of energy use for space heating and cooling (ISO 13790: 2008). National Annex. (2010).

DOI: 10.1016/j.enbuild.2006.06.007

[13] STN EN ISO 10211. Thermal bridges in building construction. Heat flows and surface temperatures. Detailed calculations. (2008).

DOI: 10.3403/30143206u

[14] ANSYS Inc. CFX 12. 1. Tutorials, Ansys CFX, Release 12. 1.

[15] T. Renčko, A. Sedláková: CFD Model of an Underfloor Air Cavity Created from Special Fittings and its Verification Using a Laboratory Model. Advanced Materials Research. Vol. 899, 235-240, (2014).

DOI: 10.4028/www.scientific.net/amr.899.235