Thermal comfort interventions of landscape elements in a humid and subtropical residential area in China

Abstract

The subjective thermal comfort intervention of landscape elements has been few characterized in previous studies. Therefore, we conducted field studies at eight open spaces in the residential areas of Guangzhou, a city with a humid subtropical climate in China. Data based on physical measurements and questionnaire surveys were collected under a variety of weather conditions during summer and winter. The survey showed the percentage of 'Neutral' votes was generally higher in winter (34.4%) than in summer (20.2%), and the percentage of people who felt "hot" was dominant (43.9%) in summer. A new empirical model was developed according to microclimatic and subjective criteria, which considers air temperature, solar radiation, and wind speed. According to the empirical model in summer, a decrease of 84 W/m 2 in global radiation or an increase of 0.35 m/s in wind speed would have the same effects on thermal perception as a drop of 1 °C in air temperature. A similar analysis could be conducted with the winter model, a change of 20 W/m 2 in global radiation or a change of 0.10 m/s in wind speed have the same effects as a change of 1 °C in air temperature. Furthermore, the thermal comfort intervention of tree, shrubs, reflective surface and pervious ground were quantitatively analyzed in winter and summer based on the empirical model. Based on the analysis, we proposed that large broad-leaved trees and pervious ground were more conducive to the improvement of thermal acceptability during different seasons in hot and humid areas of China. The results showed that in summer, the total acceptable area

Development of Equation for Predicting of Outdoor Thermal Comfort for Individuals During Nighttime in Tropical Humid Climate

“…In the world, the number of study on outdoor comfort still only about 30% compared to the study of indoor comfort. Among them, there were not many the study in the tropical humid area (Li et al, 2021;S. R. Sangkertadi et al, 2022).…”