Prediction Method of Cooling Sensation due to Breezing Airflow Driven by Cross-Ventilation in a Detached House
|Forfattere||Shunsuke Suzuki, Takashi Kurabuchi, Takeshi Ogasawara, Masaaki Ohba, Tomoyuki Endo|
|Institusjon||Tokyo University of Science , Tokyo, Japan. and Tokyo Polytechnic University, Kanagawa, Japan. and Kanto Gankuin University, Kanagawa, Japan.|
|Nøkkelord||CFD, measurement, cross-ventilation, urban area, detached house, cooling sensation|
|Redaktør||Vojislav Novakovic, Sten Olaf Hanssen, Hans Martin Mathisen|
AbstraktUtilization of cross-ventilation is an important issue for reduction of energy use in residential buildings in hot and humid seasons. Prediction of indoor airflow structures of cross-ventilated rooms is essential for evaluating thermal sensation of the occupants because enhanced heat release due to the elevated convective heat transfer is an essential part to improve thermal comfort in cross-ventilated indoor space.
This paper describes a CFD (computational fluid dynamics) procedure to estimate pressure distribution around a residential building in urban area, then cross-ventilated indoor airflow is reproduced by applying domain decomposition method of cross-ventilation. Domain decomposition method separates CFD for internal cross-ventilated flow with external flow of buildings, and enables to predict indoor airflow with reasonable computational effort and sufficient accuracy. Micro environment around human body is estimated by putting numerical thermal mannequin in the room. It was confirmed that CFD prediction results were in good agreement with corresponding experimental observations. Cooling effect due to breezing airflow was quantitatively well reproduced by the CFD technique.
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