不同送风方式对空调房间内污染物质量浓度分布的影响

Pollutant Concentration in Air-condition Room with Different Types of Air Supply

目的研究不同送风方式对空调房间内污染物的扩散影响,确定有利于消除污染物的送风方式,改善具有污染源的办公室的空气品质,为设计合理的空调系统提出建议.方法采用Airpak软件模拟了4种不同送回风方式、3种不同送风量和3种不同污染物散发量,通过模拟得到所选取不同位置的污染物的质量浓度,分析污染物质量浓度的分布特点,得出不同送风方式和不同污染物散发量下室内污染物质量浓度的分布情况.结果比较得出顶送侧回的送风方式比其他3种送风方式除污效果好,送风量的增加使污染物质量浓度明显降低,但是要控制在合适的风速范围内.减小污染物的排放量也使室内污染物的质量浓度明显降低.结论采用顶送侧回的送风方式,在一定风速范围内增加送风量即增加送风速度可降低室内污染物质量浓度.

This paper was proposed to study the diffusion effects of indoor pollutants with different air supplies which can choose one air supply to reduce the pollutant concentration, improve the of- fice＇ s air quality and offer advice for designing reasonable air-conditioning system. In this paper, the software of Airpak was used to simulate four different types of air supply, three different air volumes and three different concentrations of pollutants to reduce the concentration of indoor pol- lutants in the work area. Through simulating the selected concentration of pollutants in different lo- cations, analyzing the distribution of pollutant concentrations, obtained significantly lower concen- trations in the air supply of top-inlet and side-outlet than other three air supplies, with an increase in fresh air pollutants concentration decreased, reducing the diffusion of pollutant leading to a re- duction of the pollutant concentration. Results indicate that if we want to control the indoor poilu-tant concentration, the methods of top-inlet and side-outlet, increasing the volume of fresh air and reducing the concentration of the pollutant diffused.