• Title/Summary/Keyword: Frame cavity effective conductivity

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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 - (창틀 공기층의 유효 열전도율(λeff) 산정방법 차이가 창 전체 열관류율(Uw) 시뮬레이션 결과에 미치는 영향에 대한 비교 분석 - 단창 창틀의 비환기 공기층에 대한 시뮬레이션을 중심으로 -)

  • Lee, Yong-jun;Oh, Eun-joo;Kim, Sa-kyum;Choi, Gyeong-seok;Kang, Jae-sik
    • KIEAE Journal
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    • v.16 no.2
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    • pp.79-85
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    • 2016

  • 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.

  • https://doi.org/10.12813/kieae.2016.16.2.079 인용 PDF KSCI