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Efficiency of ventilated facades in terms of airflow in the air gap

Krzysztof Schabowicz
Krzysztof Schabowicz
, 
Łukasz Zawiślak
Łukasz Zawiślak
 y 
Paweł Staniów
Paweł Staniów
   | 30 sept 2021
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Article Category: Original Study
Publicado en línea: 30 sept 2021
Páginas: 224 - 236
Recibido: 14 abr 2021
Aceptado: 11 may 2021
DOI: https://doi.org/10.2478/sgem-2021-0014
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© 2021 Krzysztof Schabowicz et al., published by Sciendo
This work is licensed under the Creative Commons Attribution 4.0 International License.

Figure 1

Share of energy from renewable sources, 2018 [1].
Share of energy from renewable sources, 2018 [1].

Figure 2

Percentage distribution of energy consumption by sector in 2018 [1].
Percentage distribution of energy consumption by sector in 2018 [1].

Figure 3

Types of ventilated facades: a) with open joints; b) with closed joints [6].
Types of ventilated facades: a) with open joints; b) with closed joints [6].

Figure 4

Heat transfer in a) ventilated facade; b) ETICS facade.
Heat transfer in a) ventilated facade; b) ETICS facade.

Figure 5

Facade diagrams for numerical simulations of ventilated facade.
Facade diagrams for numerical simulations of ventilated facade.

Figure 6

Location of temperature measurement points: a) closed-joint ventilated facade; b) open-joint ventilated facade.
Location of temperature measurement points: a) closed-joint ventilated facade; b) open-joint ventilated facade.

Figure 7

Airflow for individual numerical models: a) closed joint: 2.5 m/s; b) closed joint: 10 m/s; c) open joint: 2.5 m/s; d) open joint: 10 m/s.
Airflow for individual numerical models: a) closed joint: 2.5 m/s; b) closed joint: 10 m/s; c) open joint: 2.5 m/s; d) open joint: 10 m/s.

Figure 8

Temperature course for individual numerical models: a) closed joint: 2.5 m/s; b) closed joint: 10 m/s; c) open joint: 2.5 m/s; d) open joint: 10 m/s.
Temperature course for individual numerical models: a) closed joint: 2.5 m/s; b) closed joint: 10 m/s; c) open joint: 2.5 m/s; d) open joint: 10 m/s.

Figure 9

Compilation of temperature and air velocity for the ventilated facade with closed joints at Point 10.
Compilation of temperature and air velocity for the ventilated facade with closed joints at Point 10.

Figure 10

Compilation of temperature and air velocity for the ventilated facade with closed joints at Point 11.
Compilation of temperature and air velocity for the ventilated facade with closed joints at Point 11.

Figure 11

Compilation of temperature and airflow velocity for individual measurement points inside the ventilation space for a ventilated facade with closed joints.
Compilation of temperature and airflow velocity for individual measurement points inside the ventilation space for a ventilated facade with closed joints.

Figure 12

Compilation of temperature and air velocity for individual measurement points outside the cladding for a ventilated facade with closed joints.
Compilation of temperature and air velocity for individual measurement points outside the cladding for a ventilated facade with closed joints.

Figure 13

Location of temperature measurement points: a) closed-joint ventilated facade; b) open-joint ventilated facade.
Location of temperature measurement points: a) closed-joint ventilated facade; b) open-joint ventilated facade.

Figure 14

Temperature overview for the control points of the close-joint facade.
Temperature overview for the control points of the close-joint facade.

Figure 15

Temperature overview for the control points of the open-joint facade.
Temperature overview for the control points of the open-joint facade.

Summary of temperatures and air velocities for measurement points.

Wind speed Point 10 Point 11 Point 16 Point 17 Point 18 Point 19 Point 20 Point 21
Temp Speed Temp Speed Temp Speed Temp Speed Temp Speed Temp Speed Temp Speed Temp Speed
K m/s K m/s K m/s K m/s K m/s K m/s K m/s K m/s
Close joint 0.0 351.8 0.0 352.7 0.0
2.5 313.8 4.6 315.1 6.0
5.0 311.5 7.8 311.7 13.9
10.0 311.4 14.8 311.4 27.8
15.0 311.3 32.0 311.3 41.7
Open joint 0.0 351.9 0.0 351.8 0.0 351.7 0.0 351.7 0.0 352.7 0.0 352.7 0.0
2.5 313.4 3.8 316.0 5.2 317.2 5.6 317.2 4.0 314.6 4.5 314.4 7.4
5.0 312.3 7.8 313.2 11.2 313.0 10.5 312.4 7.4 311.2 11.1 312.0 16.5
10.0 311.8 15.6 312.5 21.7 312.4 20.2 312.0 14.1 311.1 22.3 311.8 33.1
15.0 311.7 23.4 312.2 32.2 312.2 29.9 311.8 20.8 311.2 33.2 311.7 49.7

Compilation of temperatures for measurement points inside the room and within the wall.

Wind speed Point 1 Point 2 Point 3 Point 4 Point 5 Point 6 Point 7 Point 8 Point 9
Temp Temp Temp Temp Temp Temp Temp Temp Temp
K K K K K K K K K
Close joint 0.0 293.2 305.1 317.1 329.1 335.3 339.8 340.6 341.7 350.6
2.5 293.2 298.5 304.0 309.5 312.3 314.4 314.8 315.3 316.5
5.0 293.2 296.7 300.4 304.0 305.9 307.3 307.6 307.9 311.3
10.0 293.2 296.7 300.3 304.0 305.9 307.3 307.5 307.9 311.3
15.0 293.2 296.7 300.3 304.0 305.9 307.3 307.5 307.9 311.3
Open joint 0.0 293.2 305.1 317.1 329.2 335.3 339.8 340.7 341.7 350.6
2.5 293.2 298.3 303.5 308.8 311.6 313.5 313.9 314.4 316.1
5.0 293.2 296.8 300.4 304.1 306.0 307.4 307.6 308.0 311.4
10.0 293.2 296.7 300.3 304.0 305.9 307.3 307.5 307.9 311.2
15.0 293.2 296.7 300.3 304.0 305.9 307.2 307.5 307.9 311.2
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