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首页> 外文期刊>Building and Environment >Diurnal and seasonal variation in air exchange rates and interzonal airflows measured by active and passive tracer gas in homes
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Diurnal and seasonal variation in air exchange rates and interzonal airflows measured by active and passive tracer gas in homes

机译：房屋中主动和被动示踪气体测量的空气交换率和区域间气流的昼夜变化

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摘要

Outdoor air delivery to buildings is an important parameter in the assessment of pollutant exposure indoors. Detailed and well controlled measurements of air exchange rates (AER) and interzonal airflows in residential environment are scarce. We measured the outdoor AERs in up to six rooms in five dwellings across four seasons using active tracer gas. Night time AERs were also estimated in the bedrooms based on occupant -generated CO2. Passive tracer gas measurements were performed for comparison. AERs changed frequently during the day. Differences in outdoor AERs were observed between individual rooms. Window opening behavior had a strong influence on AERs, which were highest during occupied daytime periods, lowest in the night; highest in the summer, lowest in the winter. Significant differences were found between AERs measured by the different techniques. The median nighttime AER in all bedrooms across the four seasons was 0.49 h(-1) with the active tracer gas technique and 1.20 h(-1) with the CO2 method. The average winter AER in the five homes with the passive tracer (0.63 h(-1)) differed substantially from the corresponding AER measured with the active tracer gas (0.25 h(-1)). Additionally, we studied the pollutant distribution from one room (source room) and interzonal airflows across the dwellings. The air within a given floor was well mixed, with the average tracer gas concentration in the non-source rooms reaching approximately 70% of the source room concentration. There was less air movement between different floors. The position of the internal doors had a strong influence on the air movement. (C) 2016 Elsevier Ltd. All rights reserved.
机译：室外空气向建筑物的输送是评估室内污染物暴露的重要参数。缺乏对居住环境中空气交换率（AER）和区域间气流的详细且受到良好控制的测量方法。我们使用活性示踪气体在四个季节的五个住宅中的多达六个房间中测量了室外AER。还根据乘员产生的CO2估算卧室的夜间AER。进行了被动示踪气体测量以进行比较。白天AER频繁变化。在各个房间之间观察到室外AER的差异。开窗行为对AER有很大影响，在白天，AER最高，在夜晚最低。夏天最高，冬天最低。发现通过不同技术测量的AER之间存在显着差异。活性示踪气体技术在四个季节中所有卧室的夜间平均AER为0.49 h（-1），CO2方法为1.20 h（-1）。具有被动示踪剂的五个房屋的平均冬季AER（0.63 h（-1））与使用主动示踪气体测量的相应AER（0.25 h（-1））明显不同。此外，我们研究了来自一间房（源房）的污染物分布以及整个住宅的区域间气流。给定楼层内的空气混合均匀，非源室中的示踪气体平均浓度约为源室浓度的70％。不同楼层之间的空气流动较少。内门的位置对空气流动有很大影响。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Building and Environment》 |2016年第8期|178-187|共10页
  • 作者

    Beko Gabriel; Gustaysen Sine; Frederiksen Marie; Bergsoe Niels Christian; Kolarik Barbara; Gunnarsen Lars; Toftum Jorn; Clausen Geo;

  • 作者单位

    Tech Univ Denmark, Dept Civil Engn, Int Ctr Indoor Environm & Energy, Nils Koppels Alle 402, DK-2800 Lyngby, Denmark;

    Tech Univ Denmark, Dept Civil Engn, Int Ctr Indoor Environm & Energy, Nils Koppels Alle 402, DK-2800 Lyngby, Denmark;

    Aalborg Univ, Danish Bldg Res Inst, AC Meyers Vaenge 15, DK-2450 Copenhagen, Denmark;

    Aalborg Univ, Danish Bldg Res Inst, AC Meyers Vaenge 15, DK-2450 Copenhagen, Denmark;

    Aalborg Univ, Danish Bldg Res Inst, AC Meyers Vaenge 15, DK-2450 Copenhagen, Denmark;

    Aalborg Univ, Danish Bldg Res Inst, AC Meyers Vaenge 15, DK-2450 Copenhagen, Denmark;

    Tech Univ Denmark, Dept Civil Engn, Int Ctr Indoor Environm & Energy, Nils Koppels Alle 402, DK-2800 Lyngby, Denmark;

    Tech Univ Denmark, Dept Civil Engn, Int Ctr Indoor Environm & Energy, Nils Koppels Alle 402, DK-2800 Lyngby, Denmark;

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  • 正文语种 eng
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  • 关键词

    Ventilation; Spatial variation; Measurement technique; CO2; Occupant influence;

    机译：通风;空间变化;测量技术;CO2;人员影响;

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