摘要
以上海地区典型夏季气候条件为基础,采用计算流体动力学(computational fluid dynamics,CFD)模拟的方法分析讨论了建筑南墙在不同的太阳辐射强度作用下,建筑外表面对流换热系数对南墙吸收太阳辐射的影响。结果表明,在太阳辐射作用下,外表面对流换热系数对围护结构净得热量的影响很大。当太阳辐射强度相同时,对流换热系数为19.0 W/(m^2·K)时的南墙净得热量比8.5 W/(m^2·K)时的净得热量约少40%;若外表面对流换热系数过小,即使在阴天,围护结构的净得热量仍可能多于晴天下对流换热系数较大时的净得热量。
Based on the typical summer climatic conditions in Shanghai,the effect of convective heat transfer coefficient on the absorption of solar radiation in the south wall under different solar radiation intensity was analyzed by computational fluid dynamics(CFD)simulation method.The results show that under the influence of solar radiation,the external surface convective heat transfer coefficient has a significant effect on the net heat of the envelope.Under the same solar radiation,when the convection heat transfer coefficients are 19.0 and 8.5 W/(m^2·K)respectively,the former has 40% less net heat than the latter.Larger heat transfer coefficient can effectively reduce the wall heat absorption in solar radiation.In other words,when the heat transfer coefficient is smaller,even in the cloudy day,the envelope of the heat absorption may still be larger than that in the sunny day under higher heat transfer coefficient.
作者
郭文君
李贺
张红婴
亢燕铭
钟珂
GUO Wenjun;LI He;ZHANG Hongying;KANG Yanming;ZHONG Ke(College of Environmental Science and Engineering, Donghua U niversity, Shanghai 201620,C hina;School of Architectural and Suvrey& Map Engineering, Jiangxi University of Science and Technology, Ganzhou 341000,China)
出处
《东华大学学报（自然科学版）》
CAS
北大核心
2019年第2期301-305,312,共6页
Journal of Donghua University(Natural Science)
基金
国家自然科学基金资助项目(51478098)
关键词
建筑南墙
对流换热系数
太阳辐射
表面温度
净得热量
building south wall
convective heat transfer coefficient
solar radiation
surface temperature
net heat gain
