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http://dx.doi.org/10.5804/LHIJ.2021.12.1.119

Study on the Thermal Bridge Reduction Method Between Windows and Walls  

Kim, Woong Hoe (스타빌엔지니어링)
Kang, Kyoung Ha (스타빌엔지니어링)
Park, Cheol Yong (쌍용건설 건축기술팀)
Kwon, Young Cheol (한라대학교 건축학과)
Publication Information
Land and Housing Review / v.12, no.1, 2021 , pp. 119-128 More about this Journal
Abstract
The technology to prevent heat loss, condensation and mold generation around windows by ensuring continuity of insulation between windows and walls by using thermal bridge-breaking blocks around windows was reviewed. The results of comparing the effect of thermal bridge-breaking blocks around windows are summarized as follows. 1) The linear thermal transmittance through heat analysis was 0.089 W/m·K, showing improvement of about 63% in heat loss prevention. 2) The equivalent U-value through the actual plant test was 0.787 W/m2·K, which showed improvement in insulation performance by about 52%. 3) The condensation prevention performance through the actual plant test was shown to be improved by about 50% to 0.078 TDR. 4) The outdoor surface temperature through thermal imaging was measured 0.5℃ to 0.6℃ which was 1℃ lower thanks to the heat loss prevention around windows, and the indoor surface temperature around windows was 15.7℃ which was 2℃ higher thanks to the high insulation performance of the thermal bridge blocks. 5) The analysis of the annual energy demand of the building showed that heating energy was reduced about 35% with 30.67 kWh/m2·a. 6) Structural analysis confirmed the structural stability of concrete cross section defects that occur when constructing the thermal bridge-breaking block around a window, and the structural stability of concrete cross section defects was found out to be ensured even with the minimum reinforcement ratio.
Keywords
Thermal Bridge-Breaking Block between Windows and Walls; Linear Thermal Transmittance; Equivalent U-value; Building Energy; Condensation;
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