Contaminant dispersion with personal displacement ventilation, Part I: Base case study
Contaminant dispersion with personal displacement ventilation, Part I: Base case study
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DOI：
10.1016/j.buildenv.2009.03.006
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发表时间：
2009-10
影响因子：
7.4
通讯作者：
Yue Xu;Xudong Yang;Caiqing Yang;J. Srebric
中科院分区：
文献类型：
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作者：
Yue Xu;Xudong Yang;Caiqing Yang;J. Srebric
个人置换通风（Personal displacement ventilation， PDV）是一种将置换通风的优点与任务调节或个性化通风的优点相结合的新型通风概念。PDV有望在居住者周围创造一个微环境，以单独控制环境。在这项研究中，在一个基本的PDV情况下，在不同的位置有污染源，模拟了在一个全尺寸的室中污染物的分散。利用计算流体力学（CFD）对室内气流和污染物运移进行了模拟，并将模拟结果与实验数据进行了验证。分析了三种不同污染源位置的污染物浓度场。从我们的研究结果来看，这种PDV系统似乎不能创造出预期的“微环境”来避免外界气流的干扰。本文对如何提高PDV性能进行了进一步的研究。
Personal displacement ventilation (PDV) is a new ventilation concept that combines the positive features of displacement ventilation with those of task conditioning or personalized ventilation. PDV is expected to create a micro-environment around an occupant to control the environment individually. In this study, a base PDV case with a contaminant source at different locations was modeled for contaminant dispersion in a full-scale chamber. Computational fluid dynamics (CFD) was used to simulate the indoor airflow and pollutant transport, and the simulation results were validated against the experimental data. The contaminant concentration field for three different contaminant source locations was analyzed. Based on our results, it seems that this kind of PDV system cannot create the expected “micro-environment” to avoid the disturbance of the outside airflow. Further studies on how to improve the PDV performance are given in the companion paper.