CFD 시뮬레이션을 활용한 원형 환기창의 자연환기 성능 평가 = Evaluating Natural Ventilation Performance of the Circular Ventilation Window using CFD Simulation

다국어 초록 (Multilingual Abstract)

The purpose of this study is to comprehensively evaluate the natural ventilation performance of the circular ventilation window. The circularventilation window is a new type of window. This 145mm diameter window consists of a circular frame and a lid, and can be opened andclosed. The circular ventilation window has a feature that the installation position and number are relatively free. We evaluated the naturalventilation performance of the circular ventilation window using CFD simulation. Based on the experiment, the CFD model was built, andcase studies were performed under various conditions such as the window displacement, indoor/outdoor temperature difference, and outdoorwind speed. In addition, ventilation rates were compared with awning windows and casement windows. As a result, as the vertical distancebetween windows and the indoor/outdoor temperature difference increased, the ventilation rate tended to increase, and the ventilation patterngreatly changed according to the outdoor wind speed. Also, if the windows were arranged effectively, the ventilation rate could be increasedcompared to the existing windows.

국문 초록 (Abstract)

본 연구의 목적은 원형 창의 환기 성능을 종합적으로 평가하는 것이다. 원형 창은 기존의 사각형 창호와는 다른 형태의 새로운 창이다. 지름 145mm의 이 창은, 원형 창 프레임과 뚜껑으로 구성된다. 원형창은 원하는 위치에, 원하는 개수를 설치할 수 있다는 것이 가장 큰 특징이다. 기존에는 없던 형태의 창호이기 때문에, 창의 주요 성능 중 하나인 자연환기 성능을 평가할 필요가 있다. 본 연구에서는 CFD 시뮬레이션을 이용해 원형 창의 자연환기를 평가하였다. 실험을 기반으로 CFD 모델을 구축했으며, 창의 설치 위치, 실내 외 온도차, 실외 풍속 등 다양한 조건에서 케이스 스터디를 수행하였다. 또한, 기존 사각 어닝 창, 케이스먼트 창과도 환기량을 비교하였다. 그 결과, 창 간 수직거리와 실내외 온도차가 증가할수록 환기율이 증가하는 경향을 보였으며, 실외 풍속에 따라 환기 양상이 크게 달라졌다. 또한, 창문을 효과적으로 배치한다면, 기존 창보다 환기율을 증가시킬 수도 있었다.

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