空調區間之室內污染物移除分析

Numerical Analysis of the Indoor Pollutants Removal in an Air-Conditioning Enclosure

許文獻(Winson Hsu)

指導教授 ： 林誠興

元智大學/工程學院/機械工程學系/碩士(1998年)

摘要

室內空間已成為現代人類主要之生活場所，由於空調區間中有許多污染物的產生源，而空氣中經常伴隨著某種程度的懸浮微粒，會經由對流或擴散運動散佈四周，降低室內空氣品質，甚至會危害人體的健康，因此空調設備就扮演著室內通風及污染物移除的重要地位。空氣流動的型態相當複雜，流體的對流行為又有自然對流、強制對流、混合對流等方式，加上所模擬的室內空調區間其流場型態大都是紊流流場，再者空調區間內有障礙物的存在，因此對於區間內空氣流動的特性，很難直接由經驗做出正確的判斷。本研究主要是利用數值模擬的方法來分析限定區間內流場的結構，並規劃出三個模型分別討論。希望藉由不同的進風口、出風口的位置、速度、壁面溫度、污染源位置、區間中障礙物的大小等參數，來探討這些參數對於室內空氣品質與污染物移除效率之影響。

關鍵字

自然對流 ； 強制對流 ； 懸浮微粒 ； 室內污染物 ； 濃度場

並列摘要

Indoor space has become the main activity area for human being. Other than various gas pollutants, indoor air usually accompany to some extent of suspended particles, which spread out all around through convection or diffusion. The aerosols not only down-grade the indoor air quality but also make people sick sometimes. Therefore, air-conditioning plays an important role for the indoor ventilation and removal of pollutants. The pattern of indoor airflow is quite complicated, including three types of convection─natural, force, and possibly mixed convection. The flow field structures of the simulated indoor ventilation section could be local laminar and/or local turbulent. Furthermore, there exists obstacle (or partition) inside ventilation sections. The main focus of this thesis is to utilize numerical simulation method for analyzing the structure of limited section flow field. A well-known CFD code─PHEONICS is utilized to construct the simulation models. The effects of important parameters, including the locations of inlet, outlet, air speed, wall temperature, the location of pollution source, and others on the indoor air quality and the efficiency of the pollutants removal are investigated.

並列關鍵字

Free convection ； Forced convection ； Aerosol ； Indoor Pollutants ； Concentration Field

參考文獻

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