2025 Volume 50 Issue 344 Pages 1-10
Owing to the urban heat island effect and aging of cities, measures to prevent greater heat risk are an urgent issue. Anthropogenic heat from air conditioning in buildings is one of the factors that increase heat risk. However, there is insufficient knowledge about the impact of anthropogenic heat from air-conditioning pedestrian spaces around buildings. In this study, we developed a method to estimate the anthropogenic heat from air conditioning in buildings in commercial areas to incorporate the anthropogenic heat from buildings into the regional heat risk assessment. As a result of using this method to analyze the central business district of Japan, we confirmed that the latent heat greatly exceeded the sensible heat, and that the amount of heat exhausted between daytime and nighttime and between weekdays and holidays was different. We also compared the calculation results of this method with those of previous studies and confirmed that the differences were not large enough to change the order of magnitude. Regarding the distribution of anthropogenic heat within the area, we confirmed the time periods when there was a bias within the block.
