Numerical simulation of vegetation space and human thermal comfort based on ENVI-met software

Keywords: vegetated spaces; cooling and humidification effectiveness; thermal comfort; ENVI-met.
Abstract Type: Virtual Paper Abstract

Abstract

Actively responding to global climate change is a major strategy for China's economic and social development. New urbanization requires improving the climate adaptability of cities and alleviating urban climate problems. Numerous studies have shown that urban green spaces have significant cooling and humidifying effects, which can alleviate the heat island effect and improve human comfort. In this study, nine different vegetation spatial models were established in ENVI-met simulation software through field research on vegetation, building pattern and substrate properties to compare the effects of vegetation communities, planting density and planting layout on urban microclimate and human thermal comfort. The simulation results show that: the spatial layout of vegetation is of great significance for regulating the urban thermal environment and reducing urban heat island; comprehensively, the trend of vegetation on thermal comfort is positively correlated with the trend of temperature and PET value changes, and negatively correlated with the trend of relative humidity changes; the effect of trees in reducing the average temperature of the site is more significant than that of grass and shrubs, but as the planting density of trees increases to a certain value, its effective cooling and humidifying However, as the planting density of trees increases to a certain value, the effective cooling and humidifying ability of trees decreases; under different planting densities, there are differences in the cooling and humidifying efficiency of vegetation layout.