基于风热耦合的地下空间自然通风理论计算模型及应用
Theoretical calculation model of natural ventilation for underground space driven by wind and buoyancy and its application
摘要：
构建了一个包含捕风塔、地下空间和太阳能烟囱3个区域的自然通风系统通风流量理论预测模型,该模型阐明了室外环境参数(风速、太阳辐照度等)、建筑结构参数与系统诱导流量之间的关系。通过模型分析推导得到了临界弗劳德数,可用于判定系统的通风模式(热压主导、热压和风压共同作用、风压主导)。利用理论模型对一个配置有捕风塔和太阳能烟囱的地下空间所构成的自然通风系统进行了通风性能评估。该模型为地下建筑自然通风设计提供了一种快速评估方法。
Abstract：
This paper constructs a theoretical prediction model for the ventilation flow of a natural ventilation system, which includes three key areas: the wind tower, the underground space, and the solar chimney. The model clarifies the relationship between outdoor environmental parameters (wind speed, solar irradiance, etc.), building structural parameters, and the induced airflow rate of the system. The critical Froude number is derived from the model analysis, which can be used to determine the ventilation mode of the system (buoyancy-dominated, combined buoyancy and wind pressure, or wind pressure-dominated). The theoretical model is used to evaluate the ventilation performance of the natural ventilation system in an underground space with a wind tower and a solar chimney. This model provides a rapid evaluation method for the natural ventilation design of underground buildings.
Keywords:underground space; natural ventilation; wind tower; solar chimney; buoyancy; wind pressure; critical Froude number; theoretical model