Associated relationship between ventilation rates and indoor air quality
Associated relationship between ventilation rates and indoor air quality
复制标题
通风率与室内空气质量的相关关系
DOI：
10.1039/c6ra22902f
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发表时间：
2016-11
期刊：
影响因子：
3.9
通讯作者：
Yang Yin-Bao
中科院分区：
文献类型：
--
作者：
Cao Shi-Jie;Zhu Dong-Hao;Yang Yin-Bao
通风是建筑能耗的重要组成部分。目前的法规和标准没有就能源效率和通风率与室内危险程度之间的关系提供充分的指导。为了节约能源，研究通风量与室内空气品质（IAQ）之间的关系具有重要意义。因此，在这项工作中，我们的目的是调查通风率对室内空气品质的影响，室内通风封闭。在此，通风效率由最大局部体积平均浓度和再循环率表示。在本研究中，应用计算流体动力学（CFD）和低Re数k-e模型（通过实验验证）选择的雷诺平均Navier-Stokes（RANS）模拟，浮力的影响，考虑由于密度的差异。研究发现，当增加进风风量时，由于湍流扩散效应的增加，对室内污染物浓度的影响是相当大的。此外，这对较大范围的槽雷诺数（对于当前研究，Res ≥ 3000）的依赖性较小，并且最终倾向于显示渐近行为，这反驳了“通风率越大，IAQ越好”的常见工作假设。这些研究结果应进一步发挥重要作用的节能通风系统的设计。
Ventilation represents a significant portion of building energy consumption. Current codes and standards do not offer adequate guidance with respect to energy efficiency and to the relationship between the ventilation rate and the degree of indoor hazard. For the sake of energy savings, it is of great importance to study the associations between ventilation rates and indoor air quality (IAQ). Hence, in this work we aimed to investigate the influence of ventilation rates on IAQ for an indoor ventilated enclosure. Herein, ventilation efficiency is represented by the maximal local volume-averaged concentration and recirculation rate. In the present study, computation fluid dynamics (CFD) was applied and the low-Re-number k–e model (verified by experiments) was selected for Reynolds-averaged Navier–Stokes (RANS) simulations, with buoyancy effects considered due to density differences. We found that when increasing the inlet ventilation rates, the impact on indoor pollutant concentration was considerable due to the increase in the turbulent diffusion effects. Moreover, this was less dependent on the larger range of slot Reynolds numbers (for the current study, Res ≥ 3000) and it ultimately tends to show an asymptotic behavior, which refutes the common working hypothesis of “the larger the ventilation rates, the better the IAQ”. These findings should further play an important role in the design of energy-efficient ventilation systems.
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影响因子：
5.8
作者：
Shi-Jie Cao;J. Meyers
通讯作者：
Shi-Jie Cao;J. Meyers
影响因子：
3.6
作者：
Xianting Li;Wei Wu;C. Yu
通讯作者：
Xianting Li;Wei Wu;C. Yu
影响因子：
--
作者：
Zhang, Zhao;Zhai, Zhiqiang (John);Chen, Qingyan (Yan)
通讯作者：
Chen, Qingyan (Yan)
DOI：
10.1007/978-3-642-14767-8
发表时间：
2010-10
期刊：
--
影响因子：
--
作者：
A. Dewan
通讯作者：
A. Dewan
影响因子：
3.6
作者：
Xiaoli Wang;Angui Li
通讯作者：
Xiaoli Wang;Angui Li