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Numerical Comparison of Thermal Behaviour Between Ventilated Facades

Krzysztof Schabowicz

Krzysztof Schabowicz

Wrocław University of Science and Technology, Faculty of Civil Engineering, Department of Construction TechnologyWrocław, Poland
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Schabowicz, Krzysztof
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Łukasz Zawiślak

Łukasz Zawiślak

Wrocław University of Science and Technology, Faculty of Civil Engineering, Department of Construction TechnologyWrocław, Poland
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Zawiślak, Łukasz
  
20. Mai 2020
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Artikel-Kategorie: Original Study
Online veröffentlicht: 20. Mai 2020
Seitenbereich: 297 - 305
Eingereicht: 18. Feb. 2020
Akzeptiert: 23. März 2020
DOI: https://doi.org/10.2478/sgem-2019-0044
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© 2020 Krzysztof Schabowicz et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1

Final energy consumption by sectors (%) [13].
Final energy consumption by sectors (%) [13].

Figure 2

Final energy consumption by sector (million tonnes of oil equivalent) [13].
Final energy consumption by sector (million tonnes of oil equivalent) [13].

Figure 3

Types of ventilated facades: (a) open joint and (b) closed joint [14].
Types of ventilated facades: (a) open joint and (b) closed joint [14].

Figure 4

Facade diagrams for numerical simulations: (a) standard facade, (b) closed-joint ventilated facade and (c) open-joint ventilated facade.
Facade diagrams for numerical simulations: (a) standard facade, (b) closed-joint ventilated facade and (c) open-joint ventilated facade.

Figure 5

Numerical model of the closed-joint ventilated facade.
Numerical model of the closed-joint ventilated facade.

Figure 6

Temperature distribution maps of the facade obtained during numerical simulation: (a) standard facade, (b) closed-joint ventilated facade and (c) open-joint ventilated facade.
Temperature distribution maps of the facade obtained during numerical simulation: (a) standard facade, (b) closed-joint ventilated facade and (c) open-joint ventilated facade.

Figure 7

Location of temperature measurement points: (a) standard facade, (b) closed-joint ventilated facade and (c) open-joint ventilated facade.
Location of temperature measurement points: (a) standard facade, (b) closed-joint ventilated facade and (c) open-joint ventilated facade.

Chart 1

Temperature overview for the control points of the individual types of facade.
Temperature overview for the control points of the individual types of facade.

Characteristic values of temperature_

P1P3P7P10/P17P11/P14/P20
LocalisationStarting point40 cm from the wallInternal edge of theAir cavityExternal edge of
Standard facade293.15 K (20°C)100%319.07 K (45.92°C)100%342.73 K (69.58°C)100%--341.51 K (68.36°C)100%
Closed-joint ventilated facade293.15 K (20°C)100%303.96 K (30.81°C)95,3%315.34 K (42.19°C)92.0%313.81 K (40.66°C)99.3%340.93 K (67.78°C)99.8%
Open-joint ventilated facade293.15 K (20°C)100%303.55 K (30.40°C)95,1%313.91 K (40.76°C)91.6%316.02 K (42.87°C)100%338.59 K (65.44°C)99.1%

Thermodynamic parameters of materials_

MaterialsDensity (kg/m3)Specific Heat (J/[kg·K])Thermal Conductivity (W/[m·K])
Silicate blocks19008800.800
Polyurethane – insulation301330.0207
Fibre cement boards18009200.400
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