本文關鍵詞：氣流組織形式對室內微生物氣溶膠濃度的影響　出處：《長安大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 微生物氣溶膠 氣流組織形式 換氣次數(shù) 大氣細顆粒物

【摘要】：近些年,聞霾色變,室外空氣環(huán)境質量已經(jīng)引起了人們足夠的重視,可謂社會熱點環(huán)境問題之一。相比較,我們對于絕大部分時間處在的室內空氣環(huán)境研究甚少。在室內空氣環(huán)境的研究中,微生物氣溶膠和大氣細顆粒物已越來越受到國內外學者廣泛而高度的重視。因此,開展空調系統(tǒng)下的室內環(huán)境在不同氣流組織形式下微生物氣溶膠與大氣細顆粒物的研究,對于探究室內空氣環(huán)境質量有著重要意義。本實驗于2014年12月—2015年1月于長安大學朱雀校區(qū)氣流實驗室,選用Andersen六級撞擊式空氣微生物采樣儀和PC-3A(S)型粉塵檢測儀分別對于氣流室內外微生物氣溶膠和大氣細顆粒物進行了采樣研究,詳細考察在室外為非霾天狀況下,通過調配不同送排風氣流組織形式及變化換氣次數(shù),密閉室內建筑環(huán)境大氣微生物氣溶膠和大氣細顆粒物(PM2.5)的污染變化狀況、水平及影響因素。結論如下:(1)氣流室內不同工況下的PM2.5濃度峰值均出現(xiàn)在換氣次數(shù)為1次/h時,最小值均在換氣次數(shù)為4次/h時,相比于換氣次數(shù)為0次/h時,降幅分別達到了17.9%、30.9%、11.4%。(2)不同工況下的氣流室內微生物氣溶膠濃度均存在著較大的差異,同時細菌微生物氣溶膠濃度顯著大于真菌微生物氣溶膠濃度(p0.05)。其中,在換氣次數(shù)為1次/h時,室內微生物氣溶膠濃度在大部分工況下會出現(xiàn)突增,隨后隨著換氣次數(shù)的增加逐漸降低�？傊�,通過室內外空氣交換,室內微生物氣溶膠的濃度有著一定程度的變化,即對室內空氣品質有著相應的影響。(3)在氣流室內不同工況下,微生物氣溶膠粒徑主要分布在0.65-4.7μm的范圍。同時,可吸入細菌氣溶膠占細菌氣溶膠的比例,在20.1%-84.9%的范圍,可吸入真菌氣溶膠占真菌氣溶膠的比例波動在53.8%-79.8%的范圍。另外,細菌氣溶膠的中值直徑顯著大于真菌氣溶膠(p0.05)。其中,細菌中值直徑的最大值出現(xiàn)在側送門排,真菌出現(xiàn)在側送底排。⑷在氣流室不同送排風組合形式及換氣次數(shù)下,大氣細顆粒物PM2.5濃度與細菌、真菌氣溶膠濃度的相關性上,側面送風頂部排風的相關性要好于側面送風對門排風、側面送風底部排風。
[Abstract]:In recent years, the smell of haze pale, the air quality of the environment outdoor has attracted enough attention, is one of the hot social environmental problems. In comparison, we research on indoor air environment in most of the time is very little. In the study of indoor air environment, microbial aerosol and atmospheric fine particles have been increasingly favored by domestic and foreign scholars the high degree of attention. Therefore, the research of microbial aerosol and atmospheric fine particles in different airflow organization form to carry out air conditioning system of the indoor environment, and has an important significance to explore the indoor air quality. This experiment in December 2014 to January 2015 in Chang'an University campus were selected to Suzaku lab, and PC-3A Andersen six cascade impactor sampling air microorganism (S) type dust detector respectively for indoor air microbial aerosol and atmospheric fine particles into the line Sampling research, detailed investigation in non haze days for outdoor conditions, through the deployment of different air supply and exhaust air distribution and change of ventilation frequency, closed indoor building environment of air microorganism aerosol and atmospheric fine particles (PM2.5) pollution status, level and influencing factors. The conclusions are as follows: (1) the peak concentration of PM2.5 in indoor air under different working conditions were found in the air 1 times /h, the minimum value in the air 4 times /h, compared to the air 0 times /h, the decline reached 17.9%, 30.9%, 11.4%. (2) under different conditions of indoor air microbial aerosol concentration there were obvious differences at the same time, microbial aerosol concentration was significantly greater than that of fungi microbial aerosol concentration (P0.05). Among them, in the air 1 times /h, indoor microbial aerosol concentration will spurt in most working conditions, then with ventilation The increase of the number gradually decreased. In short, through the exchange of indoor and outdoor air, the concentration of indoor microbial aerosol has a certain degree of change, namely, with a corresponding impact on indoor air quality. (3) in indoor air under different working conditions, microbial aerosol particle size range is mainly distributed in 0.65-4.7 m. At the same time, can be inhalation of bacteria aerosol for bacterial aerosol ratio in the range of 20.1%-84.9%, inhalation of fungal aerosol proportion of fluctuation of fungal aerosol in the range of 53.8%-79.8%. In addition, the median diameter of bacterial aerosol was significantly greater than that of fungal aerosol (P0.05). Among them, the maximum bacterial median diameter appeared in the side door row, appeared in fungi the bottom row of the lateral supply. In different airflow chamber ventilation combined form and ventilation frequency, atmospheric particulate PM2.5 concentrations and bacteria, related fungal aerosol concentration, the top side air exhaust The correlation is better than the side air supply to the door exhaust, the side air supply bottom exhaust.

【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：X51;TU831

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