## 3 Results and Discussions
### Analysis on Experimental Results
#### 3.1.2 Analysis of Microclimate Results of Experiments on Open Space Layout  
When conducting the first group of experiments for the east-west street in Study 2, the average PET values in the streets under the three different open space layouts were calculated as follows: when the open space was located at both ends of the street (Model 1), the average PET value was 54.68 \({}^{\circ}\)C; when the open space was located in the middle of the street (Model 2), the average PET value was 54.44 \({}^{\circ}\)C; and when the open space was located at both the ends and the middle of the street (Model  
The overall average comfort was better when the open space was located at both ends of the street or in a mixed situation, and was worse when the open space was located in the middle of the street. Comparing Model 1 in Experiment 1 with Model 1 in Experiment 2, Model 2 in Experiment 1 with Model 2 in Experiment 2, and Model 3 in Experiment 1 with Model 3 in Experiment 2, the result shows that, under the same street layout, the internal microclimate environment of a street parallel to the dominant wind direction is better than that of a street perpendicular to the dominant wind direction, which is the same as the research results of the experiments conducted to assess the moving lines of the streets in Study 1. According to the distribution of PET values in different sections of the east-west street with different open spaces in the first group of experiments (Figure 12) and the PET results at 1.0 m at 2:00 p.m. (Figure 13), when the open space was located in the middle of the street and at the ventilation corridor of the street, the microclimate environment of the open space is comfortable, and the larger the area of the open space located in the middle of the street is, the more comfortable PET value distribution area will be. For example, in Experiment 1, the open space located in the middle of the street in Model 2 was larger than that in Model 3, and the open space located in the middle of the street in Model 3 was larger than that in Model 1. The final PET distribution result in the street was that except for the small PET value in greening, and other areas with small PET values were distributed in the open space in the middle of the street; in other words, the microclimate environment in the middle of the street was relatively comfortable, the area with a comfortable microclimate in Model 2 was larger than that in Model 3, and the area with a comfortable microclimate in Model 3 was larger than that in Model 1. This is because the open space in the middle of the street was located on the air passage of the street, and smooth airflow could flow through the passage from south to north in summer, which is equivalent to setting up an air buffer area in the open space, forming a \"wind storage\" function in the open space. The larger the area is, the stronger the \"wind storage\" function and the more comfortable the microclimate environment will be. According to the distribution of the PET values in different sections of the north-south street with different open spaces in the second group of experiments (Figure 14) and the PET results at 1.0 m at 2:00 p.m. (Figure 15), when the street was parallel to the dominant wind direction, the microclimate environment was comfortable when the open space was located at the ends of the street; and the larger the open space at the ends is, the more comfortable the microclimate environment of the street will be. For example, in Experiment 2, the open space at the ends of the street in Model 1 was larger than that in Model 3, and the open space at the ends of the street in Model 3 was larger than that in Model 2. The final PET distribution result in the street was that the comfort of the street space in Model 1 was better than that in Model 3, and the comfort of the street  
Figure 11: PET diagram at 1.0 m of the same street flow line. than that in Model 2. This is because an open space at the ends of the street is equivalent to opening an open space at the air outlet on the street.