Thermal Assessment of a Novel Drywall System Insulated with VIPs
Abstract
:1. Introduction
2. Experimental Set-Up
2.1. Test Site
2.2. Material Properties
2.3. Measuring Equipment
3. Theoretical Approach
3.1. Thermal Bridges
3.2. Total Heat Transfer Coefficient
4. Experimental Investigation
4.1. Thermal Bridges
4.2. Wall Thermal Transmittance
4.3. Experimental Determination of Heat Transfer Coefficient, HD
5. Conclusions
Author Contributions
Funding
Acknowledgements
Conflicts of Interest
References
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Element | Configuration of the Element | No | Materials | Thickness (mm) |
---|---|---|---|---|
Walls | 1 | Gypsum board | 30 | |
2 | Mineral wool | 50 | ||
3 | VIP | 20 | ||
4 | Gypsum board | 15 | ||
5 | Mineral wool | 150 | ||
6 | Air cavity | 27 | ||
7 | Cement board | 12 | ||
8 | Finishing mortar | 1 | ||
Roof | 1 | Gypsum board | 15 | |
2 | Mineral wool | 200 | ||
3 | Load panel | 28 | ||
4 | EPS | 80 | ||
5 | Roof sealing | 4 | ||
Floor | 1 | Floor | 32 | |
2 | Sound insulation | 20 | ||
3 | Load panel | 28 | ||
4 | Mineral wool | 200 | ||
5 | Gypsum board | 15 | ||
6 | EPS | 160 |
Materials | Thermal Conductivity (W/(m·K)) | Density (kg/m3) | Specific Heat (J/(kg·K)) |
---|---|---|---|
Steel stud | 60.5 | 7854 | 434 |
Gypsum board | 0.27 1 | 1033 | 990 |
Mineral wool | 0.035 1 | 23 | 850 |
VIP | 0.0045 1,2 | 195 | 800 |
Cement board | 0.35 1 | 1150 | 1000 |
Finishing mortar | 0.50 | 700 | 1000 |
Load panel | 0.44 1 | 1500 | 1000 |
EPS | 0.035 1 | 42 | 1400 |
Roof sealing | 0.2 | 1000 | 1000 |
Floor | 0.38 | 1500 | 1000 |
Sound insulation | 0.07 | 250 | 2100 |
Door | 0.22 1 | 850 | 900 |
Temperature | λcop (W/(m·K)) | ΨVIP (W/(m·K)) | λeff (W/(m·K)) |
---|---|---|---|
T = 10 °C | 0.00375 | 0.00618 | 0.00444 |
T = 23 °C | 0.00392 | 0.00616 | 0.00461 |
Wall | λeff (W/(m·K)) |
---|---|
North | 0.0046 |
West | 0.0046 |
South | 0.0047 |
East | 0.0046 |
Envelope Element | A (m2) | Uclear (W/(m2·K)) | Urepeating (W/(m2·K)) | U2D_geometrical (W/(m2·K)) | U3D_geometrical (W/(m2·K)) | Ueq (W/(m2·K)) |
---|---|---|---|---|---|---|
North wall | 13.00 | 0.093 | 0.017 (17.0%) | −0.005 (−4.8%) | −0.003 (−3.1%) | 0.10 |
West wall | 7.06 | 0.093 | 0.013 (13.8%) | −0.004 (−4.0%) | −0.006 (−6.1%) | 0.10 |
South wall | 11.28 | 0.095 | 0.019 (12.1%) | 0.019 (12.1%) | 0.023 (14.8%) | 0.16 |
East wall | 7.06 | 0.093 | 0.013 (13.8%) | −0.004 (−4.0%) | −0.006 (−6.1%) | 0.010 |
Roof | 8.66 | 0.121 | 0.135 (50.9%) | 0.012 (4.6%) | −0.003 (−1.0%) | 0.27 |
Floor | 8.66 | 0.091 | 0.052 (37.5%) | 0.002 (1.5%) | −0.007 (−5.0%) | 0.14 |
Door | 1.72 | 2.407 | 0 (0%) | 0.160 (5.9%) | 0.116 (4.3%) | 2.68 |
Period of Measurement | U-Value (W/(m2·K)) | |
---|---|---|
Experimental U-value | Winter | 0.117 |
Spring | 0.117 | |
Summer | 0.118 | |
Autumn | 0.116 | |
Average | 0.12 ± 0.02 | |
Theoretical U-value | 0.11 | |
Difference | 5.9% |
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Atsonios, I.; Mandilaras, I.; Founti, M. Thermal Assessment of a Novel Drywall System Insulated with VIPs. Energies 2019, 12, 2373. https://doi.org/10.3390/en12122373
Atsonios I, Mandilaras I, Founti M. Thermal Assessment of a Novel Drywall System Insulated with VIPs. Energies. 2019; 12(12):2373. https://doi.org/10.3390/en12122373
Chicago/Turabian StyleAtsonios, Ioannis, Ioannis Mandilaras, and Maria Founti. 2019. "Thermal Assessment of a Novel Drywall System Insulated with VIPs" Energies 12, no. 12: 2373. https://doi.org/10.3390/en12122373