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首页> 外文期刊>Building and Environment >Influence of vertical airflow along walls on temperature and contaminant concentration distributions in a displacement-ventilated four-bed hospital ward
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Influence of vertical airflow along walls on temperature and contaminant concentration distributions in a displacement-ventilated four-bed hospital ward

机译：垂直气流沿壁沿墙面的影响温度和污染浓度分布在位移通风四层医院病房中

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摘要

In hospital wards, unpleasant odors from the human body and excreta are a troublesome problem that leads to a poor indoor air environment. Displacement ventilation (DV) can provide good air quality to the lower part of the room (the occupied zone), especially when the contaminant is combined with the plume from a heat source. Hence, it is believed that DV could be an efficient way to remove unpleasant odors from wards. However, if DV is used in a room containing a window or a poorly insulated wall, the convention airflow along the vertical surface during the cold and hot season will affect the indoor environment of the room. To investigate the influence of this downward and upward airflow on indoor air quality in a displacement-ventilated ward, full-scale experiments were conducted in an environmental chamber simulating a four-bed hospital ward. The temperature and contaminant concentration distributions were measured under various conditions regarding the temperature difference between the wall surface and mom air. Consequently, downward convection airflow considerably affected the contaminant concentration in the occupied zone. As the downward airflow rate increased, the contaminant concentration in the lower part of the room also increased. Additionally, the zonal model for predicting the temperature and contaminant concentration was also validated and the calculated results corresponded well with measured contaminant concentration data.
机译：在医院病房中，来自人体和excreta的令人不快的气味是一个麻烦的问题，导致室内空气环境不佳。位移通风（DV）可以为房间的下部（占用区）提供良好的空气质量，尤其是当污染物与来自热源的羽流结合时。因此，据信DV可​​能是从病房中消除令人不快的气味的有效方法。然而，如果DV用于包含窗户或绝缘壁的房间，则寒冷和炎热季节期间沿垂直表面的公约气流将影响房间的室内环境。为了研究这种向下和向上气流对位移通风病房中的室内空气质量的影响，在模拟四层医院病房的环境室中进行全规模实验。在关于壁表面和妈妈空气之间的温差的各种条件下测量温度和污染物浓度分布。因此，向下对流气流显着影响了占用区中的污染物浓度。随着向下气流率的增加，房间下部的污染物浓度也增加。另外，还验证了用于预测温度和污染物浓度的区域模型，并且计算的结果与测量的污染物浓度数据相对应良好。

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