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利用Fluent软件,模拟分析了集中送风条件下过滤器效率、换气次数、室内PM2.5初始浓度、气流组织形式等因素对室内PM2.5浓度的影响。结果显示:侧送侧回和上送下回两种气流组织形式相比,侧送风的气流速度较快,在相同的时间内,它的扩散范围大于上送风,使室内污染面积增大;在室外空气污染较严重的情况下,增加换气次数并不利于改善室内空气品质;室内初始浓度与混合浓度呈正比关系,初始浓度越高,室内污染物越不容易稀释;新风过滤器效率对混合浓度的影响大于室内初始PM2.5浓度的影响,过滤器效率与室内PM2.5浓度呈线性关系。
Fluent software was used to simulate and analyze the effect of filter efficiency, ventilation times, initial concentration of PM2.5, and the form of airflow on indoor PM2.5 concentration. The results show that compared with the two forms of air flow, the air flow rate of the side air blower is faster than that of the side air jet side air blower, and the air diffuser area is larger than the upper air blower at the same time, which increases the indoor pollution area ; In the outdoor air pollution is more serious cases, increasing the number of ventilation is not conducive to improving indoor air quality; Indoor initial concentration and concentration is proportional to the concentration, the higher the initial concentration, the more difficult to dilute indoor pollutants; Fresh air filter efficiency The effect of concentration on the concentration of PM2.5 was greater than the initial concentration of PM2.5 in the chamber. The efficiency of the filter was linear with the concentration of PM2.5 in the chamber.