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題名 | 室內氣懸街塵在通風空間中移除之試驗研究=Experimental Study on Removal of Indoor Airborne Road Dust in a Ventilated Airspace |
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作者姓名(中文) | 黃美玉; 廖中明; 張倉榮; | 書刊名 | 農業工程學報 |
卷期 | 51:2 民94.06 |
頁次 | 頁26-40 |
分類號 | 445.63 |
關鍵詞 | 街塵; 微粒粒徑分布; 通風; 環境氣候箱; Road dust; Particle size distribution; Ventilation; Environmental chamber; |
語文 | 中文(Chinese) |
中文摘要 | 本研究以臺灣北京都市及b 區之街塵為對象,運用環境氣候箱驗描述室內氣懸街塵之移除動態行為。環境氣計六組實驗,實中四組採位移式系統(displacement system)和二組採短循環式系統(short-circuiting system),分別量測兩區間之質量濃度,並以兩種通風量(210±5及105±3□□,空氣交換率為1.04±0.02及0.52±0.01□)及兩種微粒產生量(0.1±0.02及0.05±0.01g□)進行實驗。實驗結果顯示臺灣北部都市(古亭測站)與郊區(菜?測站),氣懸街塵之顆粒粒徑分布可以下數學態分布描述,其中幾何平均粒徑分別為.01±0.03及1.06±0.02μm,及幾何標準偏差分別為2.59±0.04及2.62±0.03。當通風量為210±5及105±3□□,微粒產生量為0.01±及0.05±0.01g□時,位移式及短循環式通風系統之環境氣候箱內累積氣懸街塵濃度範圍分別為73.77±1.78~223.71±13.49及97.88±6.49~311.84±18.13μg□。對應比較得知位移式之累積氣懸街塵濃度較短循環式通風系統低,因此位移式較短循環式通風系統能有效移除氣懸街塵。本研究結果,期能作為通風剛間中室內移除或控制室內氣懸街塵質量濃度設計之參考。 |
英文摘要 | Two sets of road dust collected from urban and suburban areas situated in northern Taiwan were used in an environmental chamber test to verify the removal dynamics of airborne road dust. Four displacement associated with two short-circuiting ventilation system modes were conducted in the chamber experiment. Two airflow rates (210±5 and 105±3□□,AC=1.04±0.02及0.52±0.01□) with two road dust generation rates (0.1±0.02 and 0.05±0.01 g □) were employed to perform the experiment to measure the mass concentration of airborne road dose. Results show that there is no significant variation for particle size distributions of those road dust sample obtained from urban and suburban areas in northern Taiwan, Whereas both followed a lognormal distribution with average geometric mean diameters of 1.01±0.03 and 1.06±0.02μ and geometric standard deviations of 2.59±0.04 and 2.62±0.03, respectively. The experimental results also demonstrate that cumulative mass concentrations of airborne road dust in displacement and short-circuiting ventilation system are 73.77±378~223.71±13.49 and 97.88±6.49~311.84±18.13μg □, respectively, under airflow rate of 210.5± and 105±3□□ with road dust generation rate of 0.1±0.02 and 0.05±0.01 g□, indications cumulative mass concentration in displacement system is lower than that in short circuiting system. Moreover, the cumulative mass concentrations under airflow rate of 210±5 □□ are lower than that under 105±3 □□, in both displacement and short-circuiting ventilation systems. Results also demonstrate that the removal efficiency of displacement ventilation system is higher than that of short-circuiting one. Results obtained form this research are expected to offer designers a control strategy for removal of indoor concentrations of airborne road dust from a ventilated airspace. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。