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Evaluating a commercially available in-duct bipolar ionization device for pollutant removal and potential byproduct formation

机译:评估市售的管道双极电离装置,用于污染物去除和潜在的副产品形成

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摘要

We conducted a series of experiments to evaluate the gas and particle removal effectiveness and potential for byproduct formation resulting from the operation of a commercially available in-duct bipolar ionization device. Laboratory tests were conducted with the ionizer installed in a small air handler serving a large semi-furnished chamber. Chamber experiments were conducted under (i) normal operating conditions to characterize the impact of the ionizer on concentrations of particles (0.01?10 ?m), ozone (O3), nitrogen dioxide (NO2), volatile organic compounds (VOCs), and aldehydes, and (ii) particle injection and decay conditions to characterize the impact of the ionizer operation on particle loss rates. The field test involved air sampling of particulates (0.01?10 ?m), O3, and VOCs upstream and downstream of an operating ionizer device installed in an air handling unit serving an occupied office building. Both the chamber and field tests suggested that the use of the tested bipolar ionization unit led to a decrease in some hydrocarbons (e.g., xylenes) among the lists of compounds we were able to analyze, but an increase in others, most prominently oxygenated VOCs (e.g., acetone, ethanol) and toluene. Ionizer operation appeared to minimally impact particle, O3, and NO2 concentrations during normal operating conditions. Particle injection and decay experiments in the chamber suggest that operation of the ionizer unit led to a small increase in loss rates for ultrafine particles ( 0.15 ?m) and a small decrease in loss rates for larger particles ( 0.3 ?m), but with negligible net changes in estimated PM2.5 loss rates.
机译:我们进行了一系列实验,以评估由市售的管道双极电离装置的操作产生的副产物形成的气体和颗粒去除效果和潜力。使用安装在一个用于大型半带腔室的小型空气处理器中的离子器进行实验室测试。在(i)(i)正常操作条件下进行腔室实验,以表征离子发生器对颗粒浓度(0.01〜10·m),臭氧(o3),二氧化氮(No2),挥发性有机化合物(VOC)和醛的影响(ii)颗粒注射和腐烂条件,以表征离子发生器操作对粒子损失率的影响。现场测试涉及在安装在占用办公楼的空气处理单元中的操作离子装置的上游和下游的颗粒物(0.01?10·m),O3和VOC的空气采样。腔室和现场试验表明,使用测试的双极电离单元的使用导致了我们能够分析的化合物列表中的一些碳氢化合物(例如二甲苯)的降低,但是其他碳酸碱(例如,丙酮,乙醇)和甲苯。在正常操作条件下,离子发生器操作显得在微小的冲击颗粒,O3和NO2浓度上。腔室中的颗粒注射和衰变实验表明,离子机组的操作导致超细颗粒(0.15Ωm)的损失率的小幅增加,并且较大颗粒的损失率的小降低(0.3Ωm),但可忽略不计估计PM2.5损失率的净变化。

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  • 来源
    《Building and Environment》 |2021年第5期|107750.1-107750.14|共14页
  • 作者单位

    IIT Dept Civil Architectural & Environm Engn Alumni Hall Room 228E 3201 S Dearborn St Chicago IL 60616 USA;

    IIT Dept Civil Architectural & Environm Engn Alumni Hall Room 228E 3201 S Dearborn St Chicago IL 60616 USA;

    Portland State Univ Dept Mech & Mat Engn Portland OR 97207 USA;

    IIT Dept Civil Architectural & Environm Engn Alumni Hall Room 228E 3201 S Dearborn St Chicago IL 60616 USA;

    IIT Dept Civil Architectural & Environm Engn Alumni Hall Room 228E 3201 S Dearborn St Chicago IL 60616 USA;

    IIT Dept Civil Architectural & Environm Engn Alumni Hall Room 228E 3201 S Dearborn St Chicago IL 60616 USA;

    Colorado State Univ Dept Chem Ft Collins CO 80523 USA;

    Portland State Univ Dept Mech & Mat Engn Portland OR 97207 USA;

    IIT Dept Civil Architectural & Environm Engn Alumni Hall Room 228E 3201 S Dearborn St Chicago IL 60616 USA;

    IIT Dept Civil Architectural & Environm Engn Alumni Hall Room 228E 3201 S Dearborn St Chicago IL 60616 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Indoor air quality; Air cleaner; Ionizer; Particulate matter; Volatile organic compounds;

    机译:室内空气质量;空气净化器;离子化;颗粒物质;挥发性有机化合物;

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