Thermally improved triple-glazing windows considering the condensation resistance (TDR) and thermal transmittance (U-factor) to meet Korean standards
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The purpose of this study is to identify effective methods of improving the condensation resistance and thermal insulation performance of triple-glazed windows. These improvements should satisfy the required temperature difference ratio (TDR) of the Design Standard for Preventing Condensation in Apartment Buildings and the required thermal transmittance (U-factor) of the Construction Standards for Energy-Efficient Green Homes. In apartment buildings, various alternatives were selected for tilt-and-turn triple-glazed windows that directly face the exterior. The TDR was calculated using a three-dimensional heat transfer simulation performed with TRISCO (Physibel, Belgium), and the U-factor was calculated after the Window/Therm simulation. Under the same glazing composition, compared with Case 1 with an aluminum spacer, Case 2 with a TPS; thermal insulation spacer showed a 19.5% lower TDR on average, and Case 3 with a TPS and a 5-mm extended glazing overlap height of the frame exhibited a 23.4% lower TDR on average, thereby verifying that the condensation resistance performance was improved. The application of thermal insulation spacers is essential along with the extended glazing overlap height of the frame for satisfying the required TDR criteria of region III and above. Among the 16 alternatives that met the region II criteria of the design standard, two alternatives met the required mid region U-factor criteria of the construction standards, and 12 alternatives met the required southern region U-factor criteria. As a result, the most effective alternatives for satisfying the required TDR and U-factor of Korean design standards were outlined.
Keywordswindow condensation temperature difference ratio (TDR) U-factor glazing edge
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This research was supported by a grant (19RERPB082204- 06) from the Residential Environmental Research Program funded by the Ministry of Land, Infrastructure, and Transport of the Korean government.
- BSI (2011). BS EN 673 Glass in building—Determination of thermal transmittance (U value)—Calculation method. London: British Standards Institution.Google Scholar
- Ewha Womans University (2016). Report for development of building technology to improve the living performance closely related with lifestyle to realize the housing welfare. (in Korean)Google Scholar
- ISO (2003). ISO 15099. Thermal performance of windows, doors and shading devices—Detailed calculations. Geneva: International Organization for Standardization.Google Scholar
- ISO (2017). ISO 10077–2. Thermal performance of windows, doors and shutters—Calculation of thermal transmittance Part 2: Numerical method for frames. Geneva: International Organization for Standardization.Google Scholar
- Kim MH, Park SH, Koo SY, Lim JH, and Song SY (2016). Comparison of surface thermal resistance conditions for the condensation resistance assessment of windows using simulation. Journal of the Architectural Institute of Korea, 32(10): 113–120. (in Korean)Google Scholar
- KS (2004). KS F 2295, Test method for dew condensation for windows and doors. Korea Standard. (in Korean)Google Scholar
- KS (2014). KS F 2278, Standard test method for thermal resistance for windows and doors. Korea Standard. (in Korean)Google Scholar
- LBNL (2013). Window/Therm 6.3 User Manual. Lawrence Berkeley National Laboratory.Google Scholar
- MOLIT (2016). Design Standard for Preventing Condensation in Apartment Buildings. Ministry of Land, Infrastructure and Transport. (in Korean)Google Scholar
- MOLIT (2017a). Energy-Saving Design Standards for Buildings. Ministry of Land, Infrastructure and Transport. (in Korean)Google Scholar
- MOLIT (2017b). The Construction Standards for Energy-Efficient Green Home. Ministry of Land, Infrastructure and Transport. (in Korean) MOLIT (2018}). Housing Act. Ministry of Land, Infrastructure and Transport. (in KoreanGoogle Scholar
- MTIE (2018). The Efficiency Management Equipment Operation Regulations. Ministry of Trade, Industry and Energy. (in Korean)Google Scholar
- NFRC (2017). Procedure for Determining Fenestration Product U-factors. NFRC 100–2017. Greenbelt, MD, USA: National Fenestration Rating Council.Google Scholar
- Physibel (2010). TRISCO Manual of Version 12.0. gent Belgium: Physibel Software.Google Scholar
- Passivhaus (2015). Criteria and Algorithms for Certified Passive House Components: Opaque construction systems. Darmstadt, Germany: Passivhaus Institut.Google Scholar
- Song SY, Lim AR, Song JH, Lim JH, Lee KN, Kim YT (2012). Design criteria for preventing inside surface condensation on the curtain wall systems of office buildings. Journal of the Architectural Institute of Korea, 28: 383–392. (in Korean)Google Scholar