城市复杂辐射场形成机理  

FORMATION MECHANISM OF URBAN COMPLEX RADIATION FIELD

作　　者：刘大龙[1,2] 马岚 赵辉辉 Liu Dalong;MaLan;Zhao Huihui(School of Architecture,Xi'an University of Architecture and Technology,Xi'an 710055,China;State Key Laboratory of Subtropical Building Science,South China University of Technology Guangzhou 510640,China;School of Architecture,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]西安建筑科技大学建筑学院,西安710055 [2]华南理工大学亚热带建筑科学国家重点实验室,广州510640 [3]华南理工大学建筑学院,广州510640

出　　处：《太阳能学报》2021年第10期458-463,共6页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(51878536,51578439);陕西省重点研发项目(2021SF-466);亚热带建筑科学国家重点实验室开放基金(2018ZB16)。

摘　　要：为研究辐射热作用对城市热环境的影响机制,提出城市复杂辐射场的基本概念,阐述城市复杂辐射场的形成机制,分析建筑体形成的围合空间中由长波、短波、直射、反射等多种辐射构成的城市复杂辐射场的形成机理,建立建筑围合空间中长、短波辐射场强度的计算模型,获得城市建筑围合空间中辐射场新的分布规律。通过拉萨、哈尔滨、三亚的实测对模型进行验证。分析发现,反射辐射是造成建筑围合空间辐射场复杂的主要原因;围合空间内短波和长波辐射强度均与开敞空间明显不同;同时考虑长、短波辐射的共同热作用,围合空间各朝向建筑表面的净辐射得热量小于开敞空间。The emergence of a large number of enclosed buildings has an important impact on the urban microclimate environment,especially on the urban radiation environment.The formation mechanism of complex radiation field in cities is expounded.The formation mechanism of urban complex radiation field composed of long wave,short wave,direct radiation and reflection radiation in enclosure space formed by buildings is analyzed and expounded.The calculation model of long wave and short wave radiation field intensity in enclosure space of buildings is established,and a new distribution law of radiation field in enclosure space of urban buildings is investigated.The model is validated by field measurements data in Lhasa,Harbin and Sanya.It is found that the reflection radiation is the main reason to form the complex radiation field in the enclosure space of buildings;the radiation intensity of short wave and long wave in enclosed space is obviously different from that in open space.Considering the combined thermal effect of long and short wave radiation,the net radiation heat of enclosure space towards the building surface is less than that of open space.

关 键 词：太阳辐射 热作用 城市微气候 建筑围合空间 

分 类 号：TU17[建筑科学—建筑理论]