摘要
不同绿化组合比率会产生不同的降温效果,适宜的住区绿化组合比率可以营造更为舒适的居住环境。文章以长沙市典型住区为研究对象,应用ENVI-met量化评估住区不同绿化组合比率(乔灌比例为1∶9、2∶8、3∶7、4∶6、5∶5、6∶4、7∶3)对热环境的影响,旨在获取住区最佳的绿化组合比率。结果表明,乔木所占比例越高,其对热环境的冷却效果越强,影响范围越大:当乔灌比例为7∶3时,对空气温度的最大冷却值为0.18℃,对平均辐射温度最大冷却值为12.29℃,对PMV最大下降幅度为0.65;当乔灌比例为4∶6时,其所带来的冷却效益最大。因此,结合考虑经济成本,建议在位于夏热冬冷气候区的住区优先采用乔灌比例为4∶6的绿化组合比率。
Different green combination ratios produce different cooling effects, and appropriate green combination ratios in residential area could create a more comfortable living environment. The paper takes a typical residential area in Changsha to quantitatively evaluate the effects of different green combination ratios(1∶9, 2∶8, 3∶7, 4∶6, 5∶5, 6∶4, 7∶3) on the thermal environment by applying ENVI-met, aimed to obtain the best green combination ratio for the residential area. The results show that, when the ratio between trees and shrubs is 7∶3, the maximum cooling value on air temperature is 0.18 ℃, the maximum cooling value on average radiation temperature is 12.29 ℃, and the maximum decrease in PMV is 0.65;when the ratio is 4∶6, the cooling benefit reaches the greatest. Therefore, considering the economic cost, the green combination ratio of 4∶6 is preferred to be recommended for residential area located in hot-summer and cold-winter climate zones.
作者
谭兴
廖建军
王志远
李家宇
Tan Xing;Liao Jianjun;Wang Zhiyuan;Li Jiayu(School of Architecture,University of South China,Hengyang 421001,Hunan,China;Hunan Healthy City Construction Engineering Technology Research Center,Hengyang 421001,Hunan,China;School of Architecture and Art,Central South University,Changsha 410083,Hunan,China)
出处
《中国城市林业》
2022年第4期37-42,共6页
Journal of Chinese Urban Forestry
基金
国家自然科学基金(31901363)
湖南省健康城市营造工程技术研究中心(2019TP2073)
湖南省研究生科研创新项目(CX20200969)。
关键词
绿化组合比率
住区
热环境模拟
ENVI-met
长沙市
green combination ratio
residential area
thermal environment simulation
ENVI-met
Changsha City
