太阳能富集区城镇居住建筑围护结构热工设计参数研究

Thermal Design Parameters of Urban Residential Building Envelope in Solar Energy Enrichment Area

太阳能富集地区太阳能资源丰富且朝向差异显著,本研究以城镇多层居住建筑为例,针对围护结构由保温构件提升为保温、集热、蓄热构件过程中的热工设计参数确定问题,采用敏感性分析的方法,探究了不同朝向围护结构热工设计参数对建筑热负荷的影响规律,得到了围护结构不同热工性能重要性排序为:透光围护结构保温性>透光围护结构集热性>非透光围护结构保温性>非透光围护结构蓄热性。将太阳能富集区不同朝向(东向E、西向W、南向S、北向N和屋面R)的围护结构热工设计参数(窗墙比WWR、外窗传热系数CK、外窗太阳能得热系数SHGC、非透光围护结构传热系数WK/RK和热惰性指标WD/RD)划分了3个重要等级。本研究总结出太阳能富集区居住建筑围护结构在各向异性设计原则下的综合热工设计参数,可为进一步提升建筑节能减排水平提供参考。

Solar energy resources are abundant in solar energy-enriched areas and have significant differences in orientation.In order to determine the design parameters in the process of upgrading the envelope structure from thermal insulation components to thermal insulation,heat collection,and thermal storage components,taking urban multistory residential buildings as an example,by means of the sensitivity analysis,the influence law of thermal design parameters of different oriented envelope structures on building heat load was explored,and the order of importance of different thermal properties of envelope structures was obtained as follows:the thermal insulation of the transparent envelope > the heat collection of the transparent envelope>thermal insulation of opaque envelope > heat storage of opaque envelope.The thermal design parameters(window-to-wall ratio WWR,external window heat transfer coefficient CK,external window solar heat gain coefficient SHGC,opaque envelope heat transfer coefficient WK/RK and thermal inertia index WD/RD) of the outer envelope structure with different orientations(East,West,South,North and Roof) of the solar energy enrichment area are divided into three grades according to their importance.This paper summarizes the comprehensive thermal design parameters of the envelope structure of the solar energy enrichment area under the principle of anisotropic design,which can provide a reference for further improving the level of building energy conservation and emission reduction.