頁籤選單縮合
| 題 名 | Modulation of Cross Ventilation in a Residential Building Using a Porous Hedge=運用多孔隙圍籬調節住宅建築風力通風之研究 |
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| 作 者 | 張瑋如; 鄭政利; | 書刊名 | 中國機械工程學刊 |
| 卷 期 | 30:5 2009.10[民98.10] |
| 頁 次 | 頁409-417 |
| 分類號 | 441.64 |
| 關鍵詞 | 多孔隙圍籬; 住宅; 節能; 通風; Passive control; Porous hedge; Cross ventilation; Porosity; |
| 語 文 | 英文(English) |
| 中文摘要 | 本文運用三維數值模型探討兩面開窗住宅建物之風力通風狀況,主要在研究設置於建物前之多孔隙率圍籬對於穿越氣流之影響,包括平均速度、壓力與紊流動能強度之變化。圍籬建物間距離與圍籬高度之比固定為L/H=2.0,而圍籬孔隙率變化為η=0到1.0。研究結果顯示,多孔隙圍籬會影響穿越建物的氣流結構,進而改變建物室內外的通風型態。本研究歸納出三種典型的通風模式,分別為「逆向通風」、「無通風」,以及「正向通風」。研究亦發現在無通風狀態下體積平均紊流動能強度會達到相對最低值。 |
| 英文摘要 | The present paper has performed a three-dimensional numerical model to study the cross ventilation in a residential building. Examined are the effects of porous hedge placed ahead of the building, and focused are the physical procedures governing air movement during the cross ventilation. The ratio of the space between the hedge and the building to the hedge height is fixed at L/h=2.0, while the hedge porosity is varied from η=0 to 1.0. Detailed information about the mean velocity, pressure, and turbulent kinetic energy is provided to illustrate how the porous hedge affects the cross ventilation in a building of two-side openings. It is found that the porous hedge could modify the mean and turbulent flow structures behind it, and thus alter the cross ventilation of the building. Three types of cross ventilation can be characterized from the results presented, i.e., backward cross ventilation, null ventilation, and forward cross ventilation, respectively. Results further show that the distribution of volume-averaged turbulent kinetic energy has a local minimum value at about the null ventilation conditions. |
本系統中英文摘要資訊取自各篇刊載內容。