전산유체 해석을 통한 슬림형 이중외피 창호의 태양열 취득량 분석 - 높은 태양고도 및 하절기 냉방조건에서의 자연환기구 적용 및 창문 조절 방식별 비교

• Published in: KIEAE Journal, 71(1) Vol. 17; no. 1; pp. 69 - 75
• Main Authors: 박지호, 오은주, 조동우, 조경주, 유정연, Park, Ji-Ho, Oh, Eun-Joo, Cho, Dong-Woo, Cho, Kyung-Joo, Yu, Jung-Yeon
• Format: Journal Article
• Language: Korean
• Published: 한국생태환경건축학회 01.02.2017
• Subjects: 건축공학
• ISSN: 2288-968X; 2288-9698

Purpose: Heat transfer analysis of recently developed 'slim type double-skin system window' were presented. This window system is designed for curtain wall type façade that main energy loss factor of recent elegant buildings. And the double skin system is the dual window system integrated with inner shading component, enclosed gap space made by two windows when both windows were closed and shading component effectively reflect and terminate solar radiation from outdoor. Usually double-skin system requires much more space than normal window systems but this development has limited by 270mm, facilitated for curtain wall façade buildings. In this study, we estimated thermophysical phenomena of our double-skin curtain wall system window with solar load conditions at the summer season. Method: A fully 3-Dimentional analysis adopted for flow and convective and radiative heat transfer. The commercial CFD package were used to model the surface to surface radiation for opaque solid region of windows' frame, transparent glass, fluid region at inside of double-skin and indoor/outdoor environments. Result: Steep angle of solar incident occur at solar summer conditions. And this steep solar ray cause direct heat absorption from outside of frame surface rather than transmitted through the glass. Moreover, reflection effect of shading unit inside at the double-skin window system was nearly disappeared because of solar incident angle. With this circumstances, double-skin window system effectively cuts the heat transfer from outdoor to indoor due to separation of air space between outdoor and indoor with inner space of double-skin window system.