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Impact of Envelope Structure on the Solutions of Thermal Insulation from the Inside

Bożena ORLIK-KOŻDOŃ
Bożena ORLIK-KOŻDOŃ
 und 
Agnieszka SZYMANOWSKA-GWIŻDŻ
Agnieszka SZYMANOWSKA-GWIŻDŻ
   | 02. März 2022
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Online veröffentlicht: 02. März 2022
Seitenbereich: 123 - 134
Eingereicht: 05. Juni 2018
Akzeptiert: 23. Okt. 2018
DOI: https://doi.org/10.21307/acee-2018-059
Schlüsselwörter
© 2018 Bożena Orlik-KożDOń et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Figure 1.

Prussian wall in the building of State Music School in Gliwice [11]
Prussian wall in the building of State Music School in Gliwice [11]

Figure 2.

Selected insulation methods from the inside for the Prussian wall [16] (1 – summer vapor diffusion flux, 2 – winter vapor diffusion flux, 3 – flux of slanting rain)
Selected insulation methods from the inside for the Prussian wall [16] (1 – summer vapor diffusion flux, 2 – winter vapor diffusion flux, 3 – flux of slanting rain)

Figure 3.

Moistening with lashing rain and drying-out of the non-insulated Prussian wall
Moistening with lashing rain and drying-out of the non-insulated Prussian wall

Figure 4.

Minimum requirements involving thermal insulation layer, depending on the thermal resistance of insulation for substrates characterized by different capillary activity [20]
Minimum requirements involving thermal insulation layer, depending on the thermal resistance of insulation for substrates characterized by different capillary activity [20]

Figure 5.

a) Making opencasts and collecting material for the wall from the room side; b) Measurement of surface humidity; c) Measurement of water absorbency of the wall
a) Making opencasts and collecting material for the wall from the room side; b) Measurement of surface humidity; c) Measurement of water absorbency of the wall

Figure 6.

Thermogram made from the outside of the building in Gliwice
Thermogram made from the outside of the building in Gliwice

Figure 7.

Total water content in the envelope (25 cm) insulated with lightweight cellular concrete (markings: 30–30 mm insulator; 60–60 mm insulator; 80–80 mm insulator)
Total water content in the envelope (25 cm) insulated with lightweight cellular concrete (markings: 30–30 mm insulator; 60–60 mm insulator; 80–80 mm insulator)

Figure 8.

Changes of water content over time in a layer of the wooden frame stud in the wall insulated with lightweight cellular concrete (markings: 30–30 mm insulator; 60–60 mm insulator; 80–80 mm insulator)
Changes of water content over time in a layer of the wooden frame stud in the wall insulated with lightweight cellular concrete (markings: 30–30 mm insulator; 60–60 mm insulator; 80–80 mm insulator)

Figure 9.

Changes of water content over time in a layer of the brickwork (25 cm) insulated with lightweight cellular concrete (markings: 30–30 mm insulator; 60–60 mm insulator; 80–80 mm insulator)
Changes of water content over time in a layer of the brickwork (25 cm) insulated with lightweight cellular concrete (markings: 30–30 mm insulator; 60–60 mm insulator; 80–80 mm insulator)

Figure 10.

Total water content in the envelope (25 cm) insulated with polyurethane panels (markings: 30–30 mm insulator; 60–60 mm insulator; 80–80 mm insulator)
Total water content in the envelope (25 cm) insulated with polyurethane panels (markings: 30–30 mm insulator; 60–60 mm insulator; 80–80 mm insulator)

Figure 11.

Changes of water content over time in a layer of the wooden frame stud in the wall with polyurethane panels (markings: 30–30 mm insulator; 60–60 mm insulator; 80–80 mm insulator)
Changes of water content over time in a layer of the wooden frame stud in the wall with polyurethane panels (markings: 30–30 mm insulator; 60–60 mm insulator; 80–80 mm insulator)

Figure 12.

Changes of water content over time in a brickwork layer (25 cm) insulated with polyurethane panels (markings: 30–30 mm insulator; 60–60 mm insulator; 80–80 mm insulator)
Changes of water content over time in a brickwork layer (25 cm) insulated with polyurethane panels (markings: 30–30 mm insulator; 60–60 mm insulator; 80–80 mm insulator)

Figure 13.

Changes of water content over time for a 12 cm-thick wall insulated with 8 cm-thick light cellular concrete
Changes of water content over time for a 12 cm-thick wall insulated with 8 cm-thick light cellular concrete

Figure 14.

Summary of calculation results for the corner of Prussian wall without thermal insulation (a, b – distribution of isotherms, c – distribution of heat flux density)
Summary of calculation results for the corner of Prussian wall without thermal insulation (a, b – distribution of isotherms, c – distribution of heat flux density)

Figure 15.

Summary of calculation results for the corner of Prussian wall with 8cm-thick thermal insulation (a, b – distribution of isotherms, c – distribution of heat flux density)
Summary of calculation results for the corner of Prussian wall with 8cm-thick thermal insulation (a, b – distribution of isotherms, c – distribution of heat flux density)

Summarized data accepted for analysis

No Material/Layer R.H. [-] μ[-] λ[W/m·K] ρ[kg/m3]
1 Wood 0.8 200 0.13 650
2 Solid Brick; historical 0.8 15 0.60 1800
3 Lightweight concrete 0.8 4 0.04 115
4 Polyurethane plates 0.8 90 0.022 44

Summary of results (*values calculated for the whole bridge (both branches)

Non-insulated wall Insulated wall (8 cm thick)
U [W/m2K)] 1.57 0.34
Li 2D[W/m·K]* 4.4250 0.8673
Le 2D[W/m·K]* 4.4250 0.8673
ψi [W/m·K]* 0.3304 -0.1846
ψiwall [W/m·K] 0.1652 -0.0923
ψe [W/m·K]* -0.5048 0.0465
ψewall [W/m·K] -0.2740 0.0233
fRsi [-] 0.54 0.81
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