由於社會快速發展,人民生活水準亦愈加提升,環保問題已為國人生活中最關心的一件事,但目前國內較常見到的大多為室外空氣指標,直到最近菸害防制條例成立,不論是公共場所或是室內環境的空氣品質漸漸受到重視。室內空氣污染來源除了人體所呼出的二氣化碳之外,還有香菸及拜香,後者由於國人宗教習慣所致,室內拜香的污染似乎很難來防制。另外近年來室內瓦斯中毒的的案例有增加的趨勢,原因就是瓦斯裝設於室內居住環境,如何藉由通風機制來減低人員傷害,也是本研究重要的課題。而本研究主要是針對國內研究室內空氣污染的軟體及實驗的缺乏,希望藉由套裝軟體PHOENICS的分析以及改寫程式SAINTS,可以成功地模擬室內污染物的流場及濃度場,其結果將與文獻中的實驗值相比較,探討室內懸浮微粒之行為模式。本文根據文獻中的實驗進行模擬,規劃出六種模型來分別討論。希望藉由不同進風口、出風口的位置、速度、壁面溫度、紊流強度等參數,來討論這些參數對於室內空氣品質的影響。
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 harm our health, but also decrease in worker’s efficiency and production. Therefore, air-condition plays an important role for the indoor ventilation and removal of pollutants. The main focus of this thesis is to utilize numerical simulation method for analyzing the structure of limited section flow field. The well known CFD codes-PHOENICS and SAINTS are utilized to construct the simulation models. The effects of important parameters, including the locations of inlet, outlet, air speed, wall temperature, the location pollution source, and others on the indoor air quality and the efficiency of the pollutants removal are investigated.