Numerical Study on Microclimate and Outdoor Thermal Comfort of Street Canyon Typology in Extremely Hot Weather—A Case Study of Busan, South Korea

As cities are extremely vulnerable to the impacts of climate change, they fundamental in addressing these changes. However, streets, which external spaces accessed by citizens daily life, play an important role improving urban environment and public health. This study considered Busan South Korea as a case investigate street canyons, including canyon geometries tree configurations, old, present, new city centers. The influence morphological factors on microclimate outdoor thermal comfort was evaluated using ENVI-met program for hot weather. Changes width, orientation, aspect ratio had significantly higher impact index (p < 0.01). These results indicated that orientation main should be consistent with prevailing wind direction Busan. Further, shading adjacent buildings improved reduced significance configuration deeper canyons. In addition, height more significant than other factors, especially when increased from 9 m 12 m. We recommended level can dynamically adjusting relationship between planting distance streets having shallow