Temperature Comparison of External Thermal Insulation Wall Using Foam Glass under Thermal and Humidity Effect

Abstract:

Experiments are performed aiming at the hot summer and cold winter area climate characteristics. The BWNH-3021 type weather-resistant testing apparatus is used to achieve performances of foam glass exterior thermal insulation walls. Real-time temperatures of each functional layer are tested under hot rain cycle effect. The temperature curves are plotted to make comparisons. When the environment temperature rises about 60°C, the temperatures of primary wall will rise only 8.20°C9.30°C each in 1#2# testing wall. When cold water is suddenly sprayed, the environment temperature will fall about 51°C. Then the temperatures of primary wall will fall only 4.00°C4.20°C each in 1#2# testing wall. It shows the good thermal insulating property of foam glass exterior thermal insulation wall. The environment temperature fluctuation can also be eliminated significantly. Attenuation coefficients of different thermal insulation walls are calculated. The maximum attenuation coefficients are present when temperature is rising. The coefficients of 1#2# testing wall are 15.00 and 4.60 separately. And the delay-times of two walls are 148min133min respectively. Both of the total attenuation coefficient and delay-time of 1# wall are greater than those of 2# wall. It indicates that a thicker layer makes the temperature wave decays more and takes longer time to delay. It proved that a thicker external thermal insulation structural layer contributes to the resistance of temperature fluctuation and thermal stability.

• Periodical: Advanced Materials Research (Volume 873)
• Pages: 257-266
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.873.257
• Online since: December 2013
• Authors: Yi Ying Luo*, Xiao Yan Wu, Yi Xiang, Zhi Rong Niu
• Keywords: External Thermal Insulation System, Foam Glass, Hot Rain Cycle, Humidity Effects, Thermal Effect

References

[1] Baetens R, Jelle B P, Thue J V, et al. Vacuum insulation panels for building applications: A review and beyond[J]. Energy and Buildings, 2010, 42(2)-147-172.

DOI: 10.1016/j.enbuild.2009.09.005

[2] Bjrk F, Enochsson T. Properties of thermal insulation materials during extreme environment changes[J]. Construction and Building Materials, 2009, 23(6)-2189-2195.

DOI: 10.1016/j.conbuildmat.2008.12.006

[3] Pavlk Z, Čern R. Hygrothermal performance study of an innovative interior thermal insulation system[J]. Applied Thermal Engineering, 2009, 29(10)-1941-(1946).

DOI: 10.1016/j.applthermaleng.2008.09.013

[4] Maref W, Swinton M C, Kumaran M K, et al. Three-dimensional analysis of thermal resistance of exterior basement insulation systems (EIBS)[J]. Building and Environment, 2001, 36(4)-407-419.

DOI: 10.1016/s0360-1323(00)00022-6

[5] Al-homoud D M S. Performance characteristics and practical applications of common building thermal insulation materials[J]. Building and Environment, 2005, 40(3)-353-366.

DOI: 10.1016/j.buildenv.2004.05.013

[6] Swinton M C, Maref W, Bomberg M T, et al. In situ performance evaluation of spray polyurethane foam in the exterior insulation basement system (EIBS)[J]. Building and Environment, 2006, 41(12)-1872-1880.

DOI: 10.1016/j.buildenv.2005.06.028

[7] Guo H W, Gong Y X, Gao S Y. Preparation of high strength foam glass-ceramics from waste cathode ray tube[J]. Materials Letters, 2010, 64(8)-997-999.

DOI: 10.1016/j.matlet.2010.02.006

[8] Guo H W, Wang X F, Gong Y X, et al. Improved mechanical property of foam glass composites toughened by glass fiber[J]. Materials Letters, 2010, 64(24)-2725-2727.

DOI: 10.1016/j.matlet.2010.09.012

[9] JG149-2003"Expansion Polyphenyl Board Thin-plastering Exterior Wall and Exterior Insulation System.

[10] JG158-2004 Polystyrene Powder Particles Exterior Insulation System.