建筑围护结构空气渗透量预测模型

建筑围护结构的空气渗透量对建筑负荷与室内空气品质均有较大的影响,因此,准确预测通过建筑围护结构的空气渗透量是十分重要的。目前,国内还没有较完善的相应预测模型。本文旨在提出一种简化的预测单区域建筑在风压与热压作用下空气渗透量的模型。将建筑围护结构分为可渗透部分与不可渗透部分,对于可渗透部分中渗透路径分别作出均一分布假设与有限集中分布假设,结合国内"缝隙法"空气渗透量计算模型,提出了适用于国内的建筑空气渗透量预测模型,并通过算例验证了模型的应用可行性。

The real time air infiltration rate through the building envelope has a considerable impact on the building loads and indoor air quality. It is meaningful to develop an air infiltration model that could be used to predict the real time infiltration under various scenarios. In this paper, a simplified air infiltration model than could be used to predict the air infiltration of a single-zone building under the pressure of wind and buoyancy was built. The building envelope is classified into the permeable part and impermeable part. For the ALPs in the impermeable building envelope, two distribution assumptions have been made, and they are the uniformly porous facade with a consideration on impermeable part of the windows and doors and the facade with finite concentrated ALPs. To verify the feasibility of the model, case calculations were done.