Wind speed is negatively correlated with PET, so higher wind speed lowers PET and improves thermal comfort, while solar radiation is positively correlated with PET, raising PET and reducing thermal comfort. Solar radiation generally had a more significant overall impact on PET than wind speed, although wind speed showed greater variability in its effect.

In the courtyard thermal comfort study, partial correlation analysis showed that wind speed and solar radiation significantly influenced PET. Wind speed had a negative partial correlation with PET, meaning increased airflow lowered PET and enhanced thermal comfort. Solar radiation had a positive partial correlation with PET, meaning greater radiation increased PET and worsened thermal comfort. Overall, solar radiation had a stronger impact on PET than wind speed, but wind speed showed more variability, indicating that changes such as opening position affected PET mainly by altering airflow. The relative dominance of these two factors shifted under different renovation strategies: for example, vertical shading reduced the influence of solar radiation, while horizontal shading and increased vegetation coverage made wind speed increasingly dominant until excessive coverage reduced airflow and raised PET.

Key points

Wind speed is negatively correlated with PET; higher wind speed lowers PET.
Solar radiation is positively correlated with PET; higher radiation raises PET.
Solar radiation generally had a more significant overall impact on PET than wind speed.
Wind speed showed greater variability, especially when opening position altered airflow.
The dominant factor could shift to wind speed under horizontal shading or increased vegetation coverage.

According to the study, what is the relationship between wind speed, solar radiation, and PET in courtyard thermal comfort?

Related questions