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  • 學位論文

織布風管空調系統及其可視化熱流場特性之研究

Study on the Textile-Duct Air-Conditioning System and It’s Visual Characteristics of Air-Flow and Temperature Fields

指導教授 : 黃博全
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摘要


空調中使用風管的目的,為增進溫、濕度和流動度的有效率分布,產生均勻的室溫及舒適的環境;有別於傳統風管,在防火材料的新發現下,織布材質使用於空調風管系統具有風速及溫度分佈均勻、免保溫、成本低、重量輕、施工容易、可定期清洗保養及運輸容易等優點,有成為取代傳統風管為未來風管的主流。 本研究以實驗方法針對同一室內環境條件及設備下,對低、中、高風速型織布及鐵皮風管的管內風速、出風風速、內部壓力、環境溫度場、管外氣流場及風管成本費用等方面,探討並分析其織布風管與鐵皮保溫風管之間的差異。 實驗研究結果顯示(1)結合紅外線熱像儀與黑布幕,是研究大面積及暫態透明空氣可視化溫度場的一種理想方法。(2)織布風管本身材質的柔軟性和透氣性,其設計方式和鐵皮或硬質風管不同,以Moody Chart 及Darcy-Weisbach方程式之計算分析方式,繪製出織布風管的摩擦阻力線圖,提供簡單方便使用的摩擦阻力計算圖表。(3)織布風管本身就是風道及出風口,相對於鐵皮風管,其穩定風量變化、均勻出風狀態、管內低速度、分佈均勻及穩定的室內溫度變化,適合於人員環境需求。(4)於低速型織布風管管內外的氣流溫差,會加快了環境氣流及溫度的混合。(5)中、高速型織布風管管內外的溫差並不影響環境氣流變化,其變化決定於出風孔口角度及氣流射程距離。(6)織布風管在設計上採用一致尺寸,管內風量及風速隨風管長度而降減,產生靜壓再得現象,降低了風管輸送的壓力損失,減少運轉時的能源消耗;且織布風管沒有風門及擴散出風口等出風元件,減少了風管次要損失,有效節省能源。

並列摘要


Use the purpose of duct in the air-conditioning. For promoting temperature and humidity and air fluxion of efficient distribute the exploitation. Provide the even indoor temperature and comfortable environment. Different traditional duct mode. Prevent fire the detection of the material recently. The textile material usage has the wind velocity and temperature in the air condition duct system even, do not need the heat preservation, cost low, the weight is light and construct easily and can periodically clean to maintain and transport easy etc. advantage. This research makes use of same under the indoor environment condition and the equipment condition. For the low, medium and high wind velocity textile duct and the sheet iron duct of the wind velocity, internal pressure, environment temperature field for wind velocity, surface inside the tube of and take care of the aspects, such as the outside current of air field and the duct cost expenses...etc. The usage experiments and analyzes the difference of textile duct and the sheet iron heat preservation duct. Experimenting the research result manifestation (1) Combining the infrared heat displayer with the black cloth. Is study the big area and transient the transparent air of the can see to turn the temperature field of a kind of ideal method. (2) The textile duct oneself the softness and the well ventilated of the material. It designs the way and sheet iron or the hard duct dissimilarity. Analyze the way with the calculation of the Moody Chart and the Darcy-Weisbach equation. Describe the friction resistance line diagram of the textile duct. Provide the friction resistance calculation chart of the simply convenient usage. (3) textile duct oneself is the breeze way and pay the place with a draught. It stabilizes breeze the quantity changes , even pay the breeze appearance, material absorbs the sound and takes care of inside the low speed degree and distributes the even and stable indoor temperature variety. Suitable for personnel's environment need. (4) Take care of in the low speed a textile duct inside and outside of current of air difference in temperature, will speed the environment current of air and the mixture of the temperature. (5)The Medium and The high wind velocity a textile duct inside and outside of the difference in temperature does not influence the environment current of air variety, it changes the decision in pay the breeze hole quarrel degree and the current of Jet Distance . (6) The textile duct of the tube to adopt the consistent size on the design. Tube inside air volume and the wind velocity of the length and declines to reduce with the air, producing the static pressure again get phenomenon. The pressure that reduces the duct to transport loses. The energy that reduce the operation consumes. The textile duct has no damper and spread the place with a draught...etc. component. Reducing the breeze to take care of the next in importance loss, effectively saving the energy.

參考文獻


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[2] Air Conditioning Technology / Part 46, Vol. 15, No. 10.11, pp.22~26, July 1999
[3] DuctSox Corporation , “Engineering & Design Manual”, DuctSox Corporation, 2006

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