空氣中的懸浮微粒（Particle Matter，PM）污染影響人類健康甚鉅，過去研究指出在城市中積極綠化能有效改善空氣品質與都市熱島現象。本研究藉由適當選擇植栽種類、配置及栽種方式，預期發展一套能降低懸浮微粒濃度及改善熱環境，且低成本、低維護的陽台綠簾系統（Green Curtain System，GCS）。

選定於成功大學五樓及六樓陽台進行長期的環境量測，內容包含空氣溫度、相對濕度、黑球溫度、PM濃度、日射量及風速，以物理環境數據分析GCS對降低PM濃度及提升熱舒適度的效益。GCS植栽選定吊蘭Chlorophytum comosum、波士頓腎蕨Nephrolepis exaltata及窗簾蕨Nephrolepis pendula (Raddi) J. Sm.，實驗變因包含盆栽掛設數量、不同種類排列組合，以及洗葉頻率。

熱環境之實驗進行於6-9月，因為夏季之PM環境濃度較低，有無綠簾陽台之PM濃度無顯著差異。但作用溫度（OT）則有顯著差異（p＜0.001），以OT差異百分比（DROT）分析時，400 W/m2為分界，當日射量越高，效果越明顯；植栽盆數越多，DROT愈高。以總葉面積（L）及掛設之金屬擴張網面積（A）綜合分析時，與DROT之R2達0.77，顯示L/A Ratio具預測GCS改善熱環境效益之潛力。以WBGT評估陽台熱環境，參考健康熱風險相關研究，以32.5°C及30°C為標準，發現綠簾可有效降低超標小時數，降低健康風險。

GCS與PM濃度實驗進行於10月~隔年3月，有GCS陽台之平均PM2.5濃度均較低，且環境濃度越高差異越大。有GCS陽台之風速普遍低於無GCS陽台，顯示綠簾具降低陽台風速之效果。GCS之降PM2.5濃度效果，可以DRPM2.5代表。分項變因而論，關於植栽種類，吊蘭效果最佳，顯著優於窗簾蕨及腎蕨，窗簾蕨及腎蕨效果相似。混合種類之GCS效能普遍優於單一種類。關於植栽盆數，60盆效果最佳，大幅優於44、30及14盆。關於洗葉頻率，效果兩天1次＞一天1次＞一天2次，一天2次及一天1次無顯著差異。長期不洗葉高達17天，GCS性能未有顯著下降，但洗葉後亦未明顯提高綠簾能效。綜合以上，降低PM2.5濃度效果最佳之綠簾配置為：平均混合吊蘭、窗簾蕨、腎蕨三種類植栽共60盆，洗葉頻率兩天1次。L/A Ratio亦具預測DRPM2.5的潛力，與DRPM2.5之R2達0.52。GCS於空污事件之防護能力，在濃度高峰可減少15-18μg/m3的PM2.5，效果顯著。本研究依據全病因65歲以上之死亡風險相關性分析，綠簾可有效減少高濃度的累計時數，降低PM2.5的相對風險。

最後，本研究藉由兩階段之實驗結果，得到GCS改善熱環境及降低PM濃度於實場之驗證，並提出GCS的設計指引。

The heat island effect and airborne particulate pollution are serious environmental problems in modern cities. This study intends to explore the effect and solution of vertical greening on building balconies to improve thermal environment and PM2.5 pollution.
Research objectives include:
1. Field verification of the effect of the green curtain system on the balcony of buildings to reduce PM2.5 concentration and improve thermal environment.
2. Experiment with various green curtain configurations under different background conditions to explore their impact on the environment.
3. Propose design guidelines for balcony green curtain system.
On two balconies with similar locations and similar environmental conditions, an experimental group with green curtain and a control group without green curtain were set up. The green curtain were planted with Chlorophytum comosum, Nephrolepis exaltata and Nephrolepis pendula (Raddi) J. Sm.. Feild measurement of balcony environmental factors, including air temperature, globe temperature, wind speed,relative humidity, PM2.5 concentration, solar radiation, and leaf area, facade planting coverage of different green curtain configurations, etc. Use statistical analysis method compares the difference with and without the green curtain.
It was found that the green curtain can effectively reduce the OT( Operative Temperature) and WBGT( Wet-Bulb Globe Temperature) of the balcony. The higher background solar radiation, the more number of planting pots lead to the better effect; Green curtains can also effectively reduce the concentration of PM2.5. Planting all over green curtain,mixing various plant types, and washing leaves once every two days will have the best effect.

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