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Unhealthy indoor humidity levels associated with ventilation rate regulations for high-performance buildings in China

机译：与中国高性能建筑的通风税率规定相关的不健康室内湿度水平

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摘要

Traditionally, minimum ventilation rates (VRs) have been determined based on perceived air quality, as well as on energy and economic considerations. Recently, increased attention has been paid to health-based VRs, which emphasize the health benefits and consequences associated with pre-determined VRs. In China, higher indoor air quality (IAQ) and healthier indoor environments are in great demand as high-performance buildings (HPBs), such as "nearly zero-energy buildings", are emerging. These buildings feature higher airtightness to reduce infiltration and improve energy efficiency, whereas the additional impact on IAQ is unclear. In this study, we examined the VR regulations for HPBs from a long-overlooked, infiltration-contributed and occupant-health-correlated perspective, i.e., indoor humidity. More than 4600 building models for both residential and office HPBs in five climate zones of China were simulated, by considering occupant schedules, using EnergyPlus, as well as regular buildings for comparison. The method was validated by two sets of data, i.e., one from literature, the other from a field study. Risk of high humidity (RHH) was proposed for assessing the health risk from the indoor humidity environment, as associated with the recommended VRs. Main conclusions included, first, small-sized and some medium-sized residential HPBs in southern China had a risk of high humidity that complied with current VR regulations (approximately 8 L/s) in the Chinese standard. Second, office HPBs had little high-humidity risk under the current regulations. Third, a single design factor may double the RHH. Finally, HPBs with mandated VRs were less prone to high humidity as compared to regular buildings.
机译：传统上，基于感知空气质量以及能量和经济考虑来确定最小通风率（VRS）。最近，增加了对健康的VRS的增加，这强调了与预先确定的VRS相关的健康益处和后果。在中国，更高的室内空气质量（IAQ）和更健康的室内环境，作为高性能建筑（HPBS），例如“近零能源建筑”，正在出现。这些建筑具有更高的气密性，以减少渗透并提高能量效率，而对IAQ的额外影响尚不清楚。在这项研究中，我们研究了从长期忽视的，渗透贡献和职业健康相关的透视，即室内湿度的VR规定。通过考虑占用时间表，使用EnergyPlus以及常规建筑物进行比较，模拟了中国五个气候区的住宅和办公室HPBS的4600多种建筑模型。该方法通过两组数据验证，即来自文学的一组数据，来自实地研究的另一组。提出了高湿度（RHH）的风险，用于评估室内湿度环境的健康风险，与推荐的VRS相关联。南方南方的小型和一些中型住宅HPBS的主要结论包括高湿度的风险，符合中国标准的当前VR规定（约8升）。其次，办公HPBS在本法规下具有很小的高湿风险。第三，单一设计因子可能会加倍RHH。最后，与普通建筑物相比，具有授权VRS的HPBS易于高湿度。

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  • 来源
    《Building and Environment》 |2020年第6期|106839.1-106839.16|共16页
  • 作者

    Tang Shengyi; Zhi Chengqiang; Fan Yujie; Ye Wei; Su Xing; Zhang Xu;

  • 作者单位

    Tongji Univ Sch Mech Engn Shanghai 200092 Peoples R China;

    Tongji Univ Sch Mech Engn Shanghai 200092 Peoples R China;

    Tongji Univ Sch Mech Engn Shanghai 200092 Peoples R China;

    Tongji Univ Sch Mech Engn Shanghai 200092 Peoples R China|Tongji Univ Key Lab Performance Evolut & Control Engn Struct Minist Educ Shanghai 200092 Peoples R China;

    Tongji Univ Sch Mech Engn Shanghai 200092 Peoples R China|Tongji Univ Key Lab Performance Evolut & Control Engn Struct Minist Educ Shanghai 200092 Peoples R China;

    Tongji Univ Sch Mech Engn Shanghai 200092 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    High-performance building; Moisture; Residential building; Office; Climate zone; EnergyPlus;

    机译：高性能建筑;水分;住宅建筑;办公室;气候区;eongryplus;

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