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Ultrafine Particle Removal and Ozone Generation by In-Duct Electrostatic Precipitators

机译：管道内静电除尘器去除超细颗粒和产生臭氧

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摘要

Human exposure to airborne ultrafine particles (UFP, ＜ 100 nm) has been shown to have adverse health effects and can be elevated in buildings. In-duct electrostatic precipitator filters (ESP) have been shown to be an effective particulate control device for reducing UFP concentrations (20-100 nm) in buildings, although they have the potential to increase indoor ozone concentrations. This study investigated residential ESP filters to reduce ultrafine particles between 4 to 15 nm and quantified the resulting ozone generation. In-duct ESPs were operated in the central air handling unit of a test house. Results for the two tested ESP brands indicate that removal efficiency of 8 to 14 nm particles was near zero and always less than 10% (±15%), possibly due to particle generation or low charging efficiency. Adding a media filter downstream of the ESP increased the decay rate for particles in the same size range. Continuous operation of one brand of ESP raised indoor ozone concentrations to 77 ppb_v and 20 ppb_v for a second brand. Using commercial filters containing activated carbon downstream of the installed ESP reduced the indoor steady-state ozone concentrations between 6% and 39%.
机译：人体暴露于空气中的超细颗粒（UFP，<100 nm）已被证明对健康有不利影响，并且可以在建筑物中升高。管道内静电除尘器（ESP）已被证明是降低建筑物中UFP浓度（20-100 nm）的有效颗粒物控制装置，尽管它们有可能增加室内臭氧浓度。这项研究调查了家用ESP过滤器，以减少4至15 nm之间的超细颗粒，并量化了产生的臭氧量。管道式ESP在测试室的中央空气处理单元中运行。两个经过测试的ESP品牌的结果表明，8至14 nm颗粒的去除效率接近于零，并且始终小于10％（±15％），这可能是由于颗粒产生或充电效率低所致。在ESP的下游添加介质过滤器可增加相同尺寸范围内颗粒的衰减率。一个品牌的ESP的连续运行将室内臭氧浓度提高到77 ppb_v，第二个品牌的室内臭氧浓度提高到20 ppb_v。在已安装的ESP下游使用含有活性炭的商用过滤器，可使室内稳态臭氧浓度降低6％至39％。

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  • 来源
    《Environmental Science & Technology》 |2014年第3期|2067-2074|共8页
  • 作者

    Dustin G. Poppendieck; Donghyun Rim; Andrew K. Persily;

  • 作者单位

    National Institute of Standards and Technology, 100 Bureau Drive, MS8633, Gaithersburg, Maryland 20899, United States;

    National Institute of Standards and Technology, 100 Bureau Drive, MS8633, Gaithersburg, Maryland 20899, United States,University of California, Berkeley, 406 Cory Hall, Berkeley, California 94720-1770, United States;

    National Institute of Standards and Technology, 100 Bureau Drive, MS8633, Gaithersburg, Maryland 20899, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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