置换通风系统中人体产生的对流气流量的简化模型

A simple model of human induced convective air flow in displacement ventilation room

置换通风系统常用于会议室、教室和剧院等人员较密集的场合,这是由于其特殊的气流形式能给呼吸区提供较新鲜的冷空气。呼吸区的空气品质和热舒适性很大程度上受到室内热源驱动的上升气流的影响,而上述场合中的主要热源是人,在设计类似场合的置换通风系统时,研究人体产生的上升气流很有必要。在前人热羽流量模型的基础上,扩展出适用于人体热源的热羽流量模型,并将其与Mundt的研究结果进行了对比,指出该模型在一定条件下具有较好的正确性。

Displacement ventilation is often used in occupant dense rooms like meeting rooms, classrooms and theaters. This is due to its special air flow field which can provide cool and fresh air to the breathing room. The Air Quality and thermal comfort in the breathing room is mostly drive by the convective air flow which induced by heat source. In rooms like those mentioned above, the primary heat sources are people. So it is essential to estimate the convective air flow induced by human. In this paper, a simple model suitable for the plume air flow model of human heat source is presented. This model has been compared to the Mundt＇s model and experimental data, the result indicate that this model is correct in certain extent.