Table 1 shows the parameters investigated using the exceedance probability analysis, including opening configuration, areaway plan area building coverage ratio (R), orientation, and construction site of the model.
Among the parameters listed in Table 1, opening configuration, areaway plan area, and building coverage ratio may have influences on the ACR in the basement, while orientation and construction site of the model only affects the results of exceedance probability.
The ACR results due to the changing of the areaway plan area are presented in Figure 7 as a function of wind incident angle.
Based on the exceedance probability distribution and the proposed simple analysis approach using [ACR.sub.15%] and [ACR.sub.85%], the parameters of opening configuration, areaway plan area, building coverage ratio, and site of the model were investigated in detail in this section.
The influence of areaway plan area on the natural ventilation performance in the basement was further analyzed, and the results of exceedance probability distributions are presented in Figures 14 and 15 for the model orientations with the overall highest and lowest exceedance probability values in each case, respectively.
The opening configuration and the areaway plan area show significant influence on ventilation performance in the basement.
Although the areaway-attached basement model used in the present article is quite simple, the findings of this study can provide some useful information and guidelines for areaway design and application in practice.