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大型公共建筑PM2.5控制技术是指室内外新回风通过物理过滤技术手段进行PM2.5高效过滤,为室内环境提供安全、健康、舒适、节能的空气.PM2.5过滤成套装置包括PM2.5空气过滤器、PM25浓度探测仪、PM2.5浓度显示仪等产品. 相似文献
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《Planning》2017,(1)
目的初步了解我国民用航空器座舱高效空气过滤器(HEPA)滤网微生物污染状况。方法采用涂抹法对高效空气过滤器再循环风扇滤网进风口面和出风口面采样。2015年11月及2016年1月,分别收集2架波音客机高效空气过滤器滤网,共采集细菌样本48个,真菌样本75个,通过分子生物技术对样本种属进行鉴定。结果对飞机高效过滤器滤网表面的进风口表面和出风口表面的细菌总数和真菌总数,以及两架不同机龄的飞机再循环风扇滤网表面的细菌总数、真菌总数分别进行了比较,发现差异均存在统计学意义(P<0.05)。同时,进风口表面细菌优势菌种鉴定可能为杆菌属、真菌优势菌种为枝孢属、曲霉菌属、球腔菌属、小光壳属、青霉菌属。结论滤网出风口面较进风口面卫生,推断高效空气过滤器对细菌、真菌的过滤效果良好,下一步飞机消毒方式应重点针对飞机座舱内座椅、配餐间、卫生间等的物表消毒,其次是空气消毒。 相似文献
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生物安全实验室排风高效过滤器检漏方法探讨 总被引:3,自引:0,他引:3
冯树根 《建筑热能通风空调》2006,25(1):91-93
介绍了生物安全实验室的安全防护及排风系统的重要性。对《生物安全实验室建筑技术规范》GB50346-2004中有关排风高效过滤器检漏试验的可行性进行了分析讨论,提出在实验室适当位置设置排风高效过滤装置专用检漏接口的建议。强调对厂检合格的排风高效过滤装置在安装前也应在现场进行再检漏,以防止由于装御、运输造成的泄漏。 相似文献
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空气过滤器是过滤空气中悬浮粒子的设备。《高效空气过滤器 GB13554-92(简称高效过滤器)是指按国际规定的方法检验,其效率达到99.9%以上的过滤器。当对≥0.1μm的粒子计数效率达到99.99%以上时,亦称超高效过滤器。高效过滤器是实现高洁净度空气净化的关 相似文献
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Combined use of an electrostatic precipitator and a high‐efficiency particulate air filter in building ventilation systems: Effects on cardiorespiratory health indicators in healthy adults
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D. B. Day J. Xiang J. Mo M. A. Clyde C. J. Weschler F. Li J. Gong M. Chung Y. Zhang J. Zhang 《Indoor air》2018,28(3):360-372
High‐efficiency particulate air (HEPA) filtration in combination with an electrostatic precipitator (ESP) can be a cost‐effective approach to reducing indoor particulate exposure, but ESPs produce ozone. The health effect of combined ESP‐HEPA filtration has not been examined. We conducted an intervention study in 89 volunteers. At baseline, the air‐handling units of offices and residences for all subjects were comprised of coarse, ESP, and HEPA filtration. During the 5‐week long intervention, the subjects were split into 2 groups, 1 with just the ESP removed and the other with both the ESP and HEPA removed. Each subject was measured for cardiopulmonary risk indicators once at baseline, twice during the intervention, and once 2 weeks after baseline conditions were restored. Measured indoor and outdoor PM2.5 and ozone concentrations, coupled with time‐activity data, were used to calculate exposures. Removal of HEPA filters increased 24‐hour mean PM2.5 exposure by 38 (95% CI: 31, 45) μg/m3. Removal of ESPs decreased 24‐hour mean ozone exposure by 2.2 (2.0, 2.5) ppb. No biomarkers were significantly associated with HEPA filter removal. In contrast, ESP removal was associated with a ?16.1% (?21.5%, ?10.4%) change in plasma‐soluble P‐selectin and a ?3.0% (?5.1%, ?0.8%) change in systolic blood pressure, suggesting reduced cardiovascular risks. 相似文献
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T. M. Korves Y. M. Piceno L. M. Tom T. Z. DeSantis B. W. Jones G. L. Andersen G. M. Hwang 《Indoor air》2013,23(1):50-61
Practical Implications
A biosensor that could be deployed in commercial aircraft would be required to function at an extremely low false alarm rate, making an understanding of microbial background important. This study reveals a diverse bacterial background present on aircraft, including bacteria closely related to pathogens of public health concern. Furthermore, this aircraft background is different from outdoor air, suggesting different probes may be needed to detect airborne contaminants to achieve minimal false alarm rates. This study also indicates that aircraft HEPA filters could be used with other molecular techniques to further characterize background bacteria and in investigations in the wake of a disease outbreak.14.
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在实验研究确立的多管式高效空气过滤器阻力的理论公式的基础上,以寿命期总费用为目标函数建立了该型过滤器的最优设计数学模型。采用序列二次规划法求解此约束优化模型,得到了该种过滤器在寿命期总费用最小时的最优化结构设计参数。并与按阻力最小化得到的结果进行了比较分析,指出基于寿命期总费用的最优设计更合理。 相似文献
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In this study, we explore different filter and contextual characteristics that influence effectiveness of high-efficiency filters in 21 residences in Toronto, Canada. The in situ effectiveness was assessed with decay tests at the beginning and the end of filter life with four different filters (MERV 8-14 from ASHRAE Standard 52.2) installed in operational HVAC systems, compared with either the system off or with no filter installed. There was considerable difference between median PM2.5 effectiveness of the non-electret filters when compared to electret filters (16% vs. 36%) of the same nominal efficiency (MERV 8). However, median PM2.5 effectiveness of electret filters only slightly improved (between 5% and 9% absolute increase) as MERV increased from 8 to 14. There was more variation in filter effectiveness between the same filter in different homes than there was between different filters in the same home. Variations in filter performance arose because home-specific particle loss rates (eg, ventilation rate) vary greatly in different buildings. The higher the loss rates due to non-filter factors, the lower the effectiveness of a filter. Given the relatively large variation in effectiveness for a given filter over time and in different homes, increasing system runtime may be a productive way to improve filter performance in many homes. 相似文献
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介绍了国内现行空气过滤器效率的标准检测方法——大气尘计数法,指出了该效率检测方法的优缺点。详细介绍了当前欧、美等国家空气过滤器效率的标准检测方法—气溶胶粒径计数法,并从试验用气溶胶、检测仪器和效率标识三个方面对欧、美的效率检测方法进行了详细的分析比较。列出了气溶胶粒径计数法较大气尘计数法的优越性,进而提出了用气溶胶粒径计数法来检测空气过滤器效率的观点。并详细说明了用气溶胶粒径计数法检测空气过滤器效率的操作方法。 相似文献
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舒适性空调空气过滤器效率计算方法 总被引:6,自引:3,他引:3
给出了舒适性空调空气过滤器效率的设计计算公式,分析了公式中各量的取值范围,以商场和办公室为例计算出了空气过滤器效率,并分析了计算结果。 相似文献