驻极体空气过滤器对办公环境PM_(2.5)的净化效果  

PM_(2. 5) filtration performance of electret air filter in office buildings

作　　者：水甜甜 沈恒根[1] 杨学宾[1] 马欢[1] 聂雪丽[1] 周刘轲 刘琳[1] 

机构地区：[1]东华大学环境科学与工程学院,上海201620

出　　处：《环境工程学报》2015年第6期2933-2940,共8页Chinese Journal of Environmental Engineering

基　　金："十二五"国家科技支撑计划课题(2012BAJ02B07);中央高校基本科研业务费专项资金

摘　　要：针对办公环境PM2.5的净化问题,现场测试了以3种不同过滤面积的驻极体空气过滤器为核心过滤元件的空气净化器的过滤性能,并与普通高效微粒空气过滤器(high-efficiency particulate air,HEPA)、初效碳纤维滤层和活性炭滤网等进行了对比。测试点为上海某三楼办公室座位区离地面1.1 m处人体坐姿呼吸平面。采用蜡烛烟雾作为室内微细颗粒污染物的来源。分别测试了40 min内PM2.5的质量浓度衰减值和相应运行功率,并计算了净化器处理风量和洁净空气量。结果表明,过滤面积在0.20~0.54 m2范围内驻极体过滤器的过滤效率随面积增加而提高;过滤面积为0.29 m2的驻极体处理风量最大;以洁净空气量与功率的比值作为指标,可以直观判断出净化效果最好的是初效滤网叠加过滤面积为0.54m2的驻极体过滤器;该工况下40 min内PM2.5浓度衰减率与HEPA几乎相同且均接近70%,但是洁净空气量大于HEPA。Aiming at the PM2. 5purification in office buildings,this study field tested the filtration performance of three types of electret air filters with different filtration areas and compared them with high efficiency particulate air( HEPA) filter,primary efficiency filter layer and granular activated carbon filters. The office building was located in Shanghai and the measured point was on the 1. 1 meters just above the floor and in the occupant breathing zone. Smoke of wax pure candles was employed as the indoor source to generate the airborne fine particulate matter. The attenuation value of PM2. 5mass concentration and the power of the air cleaner were measured in 40 minutes. Also both the filter air flow rate and the clean air delivery rate were calculated. The results show that the filtration efficiency of electret air filters increases with filtration area if the filtration area is between 0. 20 and 0. 54m2. The electret air filter with 0. 29 m2 exhibits the largest clean air delivery rate. Using the ratio of clean air delivery rate divided by power as an evaluating indicator,the filter combining a primarily efficient filter with the 0. 54 m2 electret filter presents the highest filtration performance. Meanwhile,its attenuation value is close to 70% within 40 minutes and similar to the HEPA media. Its clean air delivery rate,however,seems greater than the HEPA media.

关 键 词：空气净化 PM2.5 驻极体空气过滤器 高效空气过滤器 洁净空气量 

分 类 号：X51[环境科学与工程—环境工程] TU834.83[建筑科学—供热、供燃气、通风及空调工程]