大樓外側遮陽帷幕存在價制及熱環境分析－以國立虎尾科技大學文理暨管理大樓為例

Thermal Environment Exists Outside of the Building Shade Curtain-Case Study of Artsand Management Building, National Formosa University

梁大慶(Ta-Ching Liang) ； 許維芝(Wei-Chih Hsu)

《國立虎尾科技大學學報》 32卷1期 (2014/06) Pp. 25-33

https://doi.org/10.6425/JNHUST.201406_32(1).0003

摘要

台灣地處低緯度地區，終年受到陽光直射或小角度正射，部分新建大樓在設計時，往往會考慮西曬問題，因此常在大樓外側架設遮陽帷幕，以解決西側太陽直射且帶來室內溫度升高的問題。本校新建的文理暨管理學院大樓，在原設計中為了解決西曬問題，在大樓西側加設一幅由五樓延伸至六樓的白色大型遮陽帷幕，以阻擋陽光直射的問題，但也延伸通風不良及視覺障礙的缺點；其遮陽帷幕是否真有達到降溫之效能或其降溫程度如何，原設計單位也提不出確切的證明。本研究使用建築熱能分析軟體重建量體及材質特性，並模擬導入氣候條件，進行熱環境及日照分析，探討遮陽帷幕之實際效益，並分析舒適度的狀況。本研究以國立虎尾科技大學文理暨管理學院大樓之數位建模及材質設定，透過相關邊界條件設定及熱流計算，分析內容包括日照間距與時間的計算、逐時溫度分析、各空間的耗能分析及空間舒適度分析，並比較遮陽帷幕架設前後之差異性。歸納結論分述如下：一、日照間距與時間分析大樓外側加蓋白色帷幕陰影部分，日照時數由4.5小時變為0，對於西曬（日光直射）有著顯著的改善，有其存在之價值及功能。二、逐時溫度分析位於建築物本體同層西南側的室內溫度為最高，而北側室內溫度最低。三、同樓層西側有受遮陽帷幕影響和未受遮陽帷幕影響溫度達3.1℃的差異。四、在空間舒適度分析方面，以平均輻射溫度範圍值在32~33℃時，熱舒適度指標為2.1PMV，不滿意指標（PPD）高達81.9％，若不啟開空調冷氣的狀況下，處於不舒適的環境。

關鍵字

熱環境 ； 遮陽帷幕 ； 舒適度

並列摘要

Taiwan located in the lower latitudes, and all year-round direct sunlight and shine in small angle. There is a very important problem in western side exposure. Shade curtain erected outside the building is a common method in order to solve the west side of the direct sun and getting high temperature. The Management College buildings also meet this problem. The shade curtain is really how to achieve the degree of cooling performance or cooling, the relevant units also failed to provide clear evidence, resulting in the formation of controversy. In this study, the use of building energy analysis software reconstruction massing and material properties, and simulate import climatic conditions, the thermal environment and sunshine analysis to explore the practical benefits of shade curtain, and further analysis comfort and air-conditioning power consumption status. In this study, digital modeling and texture settings of Management College building in National Formosa University, setup and calculate the heat flux through the relevant boundary conditions, including sunlight pitch analysis and calculation time, hourly temperature analysis, energy analysis of each space comfort and space analysis and comparison shade curtain erected difference before and after. Summarized the conclusions are as follows: 1. Sunbeam duration is from 4.5 hours to 0, the western exposure (direct sunlight) has significantly improved in white curtain shaded. 2. Interiortemperature of building located on the southwest corner of the analysis with the highest level of indoor temperature, while the north side of the indoor temperature minimum. 3. In the same floor affected and unaffected by sun shade curtain effect of temperature difference of 3.1℃ difference. 4. Setting up the average temperature of outside is 32 ~ 33 ℃, the indoor thermal comfort index is 2.1PMV, dissatisfaction index (PPD) of up to 81.9% in the case haven't turn on air condition.

並列關鍵字

Thermal environment ； Shading curtain ； Comfort analysis

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