不同屋頂綠化型式對屋頂隔熱效果影響之研究-以草本、灌木及棚架為例

The Effect of Roof Heat Insulation by Different Green Roof Type-Using Turfgrass, Shrubs and Trellis an Example

林姵均(Pei-Chun Lin)

指導教授 ： 郭章淵

朝陽科技大學/設計學院/建築及都市設計研究所碩士在職專班/碩士(2011年)

摘要

為探討屋頂綠化隔熱效果，本研究採用調查法及實地實驗法進行研究。調查法為蒐集國內外屋頂綠化實際施作案例，以做為本研究屋頂綠化設計規劃之參考。實地實驗法為規劃草本、灌木及棚架三種不同屋頂綠化型式，進行屋頂綠化施作前後測量以及屋頂綠化隔熱效果測量，測量項目包括外氣溫度、頂層室內溫度、室內天花板表面溫度及室外屋頂表面溫度。利用統計方式針對屋頂綠化隔熱效果進行探討，包括屋頂受日照後對室內天花板表面溫度影響；屋頂綠化施作前後對室內天花板表面溫度影響；不同屋頂綠化型式之時滯效應及對屋頂板內外表面溫度差影響；不同屋頂綠化型式對頂層室內溫度及室內天花板表面溫度影響；不同屋頂綠化型式對室外屋頂表面溫度影響。
在本研究實驗結果所得之結論如下：1.屋頂受日照後，室內天花板表面溫度高於外氣溫度約6.7℃。2.三種屋頂綠化型式皆具有隔熱效果，施作前後溫度差約9.3~12.2℃。3.三種屋頂綠化型式之頂層室內最高溫度延遲時間約2至3時；室內天花板表面最高溫度延遲時間約3至5時；屋頂板內外表面溫度差約16.9~18.7℃。4.三種屋頂綠化型式可降低頂層室內溫度約2.4~2.6℃；降低室內天花板表面溫度約5.7~8.7℃。5.草本及灌木屋頂綠化型式可降低室外屋頂表面溫度約9.4~13.4℃。因此，本研究建議：1.依據本研究之實驗結果得知屋頂綠化確實具有隔熱效果，為可行之方案，可供未來屋頂綠化隔熱設計規劃之參考。2.草本及灌木屋頂綠化型式隔熱效果較佳。3.棚架屋頂綠化型式需考量側邊日照問題。

關鍵字

屋頂綠化 ； 屋頂隔熱效果 ； 時滯效應

並列摘要

In order to explore the insulation effect of rooftop greening, Investigation Method and Field Experiment Method were adopted in this study to undertake the research. Through Investigation Method, the actual implementation cases of rooftop greening domestically and overseas were collected, so as to provide the reference for the designing and planning of rooftop greening in this study. Through Field Experiment Method, the three different types of rooftop greening—turfgrass, shrubs, and trellis— were planned, for undertaking the measurement before and after the implementation of rooftop greening as well as the measurement of the insulation effect of rooftop greening. The measurement items included atmospheric temperature, indoor temperature of top floor, surface temperature of indoor ceiling and surface temperature of outdoor rooftop. By means of statistic ways, aimed at the insulation effect of rooftop greening, the exploration was made, including the influence on the surface temperature of indoor ceiling after the rooftop received sunshine, the influence on the surface temperature of indoor ceiling before and after the implementation of rooftop greening, the influence of Time Lag Effect time-lag on different types of rooftop greening and the influence on the surface temperature difference inside and outside the rooftop board, the influence on the indoor temperature of top floor and the surface temperature of indoor ceiling in different types of rooftop greening, and the influence on the surface temperature of outdoor rooftop in different types of rooftop greening.
The conclusions from the experiment results in this study were listed as follows: 1. After the rooftop received sunshine, the surface temperature of indoor ceiling was higher than atmospheric temperature by approximately 6.7℃. 2. The three types of rooftop greening all had insulation effect; the temperature difference before and after the implementation was around 9.3~12.2℃. 3. In the three types of rooftop greening, the delay time of the highest temperature of top floor indoor was around 2~3 hours; the delay time of the highest temperature of indoor ceiling surface was around 3~5 hours; the surface temperature difference of inside and outside the rooftop board was around 16.9~18.7℃. 4. Through the three types of rooftop greening, the indoor temperature of top floor could be reduced by approximately 2.4~2.6℃; the surface temperature of indoor ceiling was reduced by approximately 5.7~8.7℃. 5. Through turfgrass type and shrubs type of rooftop greening, the surface temperature of outdoor rooftop could be reduced by approximately 9.4~13.4℃. Therefore, the suggestions in this study were: 1. According to the experiment results in this study, it was known that rooftop greening had insulation effect indeed. This can be a feasible project, able to be provided as the reference for the designing and planning of rooftop greening and insulation in the future. 2. Turfgrass type and shrubs type of rooftop greening had the best insulation effect. 3. As for trellis type of rooftop greening, the problem of side sunshine should be taken into account.

並列關鍵字

time-lag ； Effect of Roof Heat Insulation ； Green Roof

參考文獻

18. 徐森雄，2005，"不同土壤之地溫、水分與熱流之變化"，作物、環境與生物資訊，第2卷，pp.201-210。

28. 陳怡陵，2010，"建築物牆面採不同植栽形式與綠覆率之視覺偏好研究"，朝陽科技大學建築及都市設計研究所碩士論文，台中。

34. 蘇柏年，2008，"RC建築物平頂綠化防根構法之研究"，國立成功大學建築研究所碩士論文，台南。

33. 謝維芳，2005，"不同植栽對建築物隔熱效果影響之研究"，國立中興大學園藝學系碩士論文，台中。

1. Eumorfopoulou, E.&Aravantinos, D., 1998, " The contribution of a planted roof to the thermal protection of buildings in Greece", Energy and Buildings, Vol.27, pp.29-36.