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A comparative analysis of the total window thermal transmittance simulation result according to the evaluation method of effective conductivity(λeff) of frame cavity - Focused on unventilated frame cavity simulation results of single window -
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  • Journal title : KIEAE Journal
  • Volume 16, Issue 2,  2016, pp.79-85
  • Publisher : Korea Institute of Ecological Architecture and Environment
  • DOI : 10.12813/kieae.2016.16.2.079
 Title & Authors
A comparative analysis of the total window thermal transmittance simulation result according to the evaluation method of effective conductivity(λeff) of frame cavity - Focused on unventilated frame cavity simulation results of single window -
Lee, Yong-jun; Oh, Eun-joo; Kim, Sa-kyum; Choi, Gyeong-seok; Kang, Jae-sik;
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 Abstract
Purpose: It is difficult to calculate frame U-value because of the two reason. First is selection of air properties in cavity. Second is calculation method in window frame. For this reason, it is important to decide cavity properties in window frame. However, international standards offered different method(ISO 15099, ISO 10077) and air properties was changed according to the two methods. The aim of this study was to suggest method for deriving accurate frame U-value using international standard methods and CFD simulation. Method: First, this study conducted analysis calculation method of ISO 15099 and ISO 10077. And, CFD simulation conducted based on same condition. Finally, ISO calculation and CFD simulation results were verified through comparison with real experiment results. Result: The results show that effective conductivity of ISO 15099 was the highest value. ISO 10077 and CFD result followed. The convergent values of ISO 10077 was the highest. ISO 15099 and CFD followed. ISO calculation reflecting CFD simulation results will reduce error with experimental results.
 Keywords
Fenestration energy consumption efficiency;rating system;Total window thermal transmittance;Frame cavity effective conductivity;
 Language
Korean
 Cited by
 References
1.
ISO, ISO 15099:2003(E) Thermal performance of windows, doors and shading devices - detailed calculations, 2003

2.
ISO, ISO 10077-1:2006(E) Thermal performance of windows, doors and shutters - Calculation of thermal transmittance part 1: General, 2006

3.
ISO, ISO 10077-2:2012(E) Thermal performance of windows, doors and shutters - Calculation of thermal transmittance part 2: Numerical method for frames, 2012

4.
KS, KS F 2278:2014 창호의 단열성 시험방법 // KS, KS F 2278:2014 Standard test method for thermal resistance for windows and doors

5.
Arild Gustavsen, PhD, et al. "Experimental and Numerical Examination of the Thermal Transmittance of High Performance Window Frames", 2010, ASHRAE