浅议成都地区外窗遮阳系数对建筑能耗的影响  

Effect of Exterior Window's Shading Coefficient on Building Energy Consumption in Chengdu

作　　者：刘旭良 于秉坤 

机构地区：[1]中机工程勘察设计研究院,成都610066

出　　处：《建筑节能》2010年第3期74-76,共3页BUILDING ENERGY EFFICIENCY

基　　金：四川省建设厅2008年新型墙体材料专项基金资助项目(08)

摘　　要：针对成都地区的气候特点,采用中科院以DOE-2为计算核心开发的节能分析软件PBECA2008,建立了典型的房间建筑模型,分别计算了东、西、南、北4个主要方向上,窗户遮阳系数和传热系数对单位外窗面积空调和采暖年耗电量的影响。结果表明:在东、西、南、北4个主要方向上,单位外窗面积采暖年耗电量与遮阳系数大致呈负线形关系,传热系数主要影响截距大小;在东、西、北3个方向上,单位外窗面积空调年耗电量与遮阳系数大致呈正线形关系,传热系数同样主要影响截距大小;在南向上,单位外窗面积空调年耗电量随遮阳系数增大而增大的过程中,有突然陡降的临界现象。利用临界现象,合理的选取遮阳系数,可以达到降低外窗成本和降低房间能耗的双重效果。Considered the features of the climate in Chengdu, a t）pical building-apartment model is established from the calculating result of the analysis software PBECA2008 developed by Chinese Academy of Sciences which is based on Modular Computing Core DOE-2. The influence of window shading coefficient and heat transfer coefficient which are correlated with tbe annual air conditioning electricity and heating power consumption in unit area of window has been calculated independently in 4 main directions： East, west, south and north. The consequence illustrates that in each direction there is negative linear relationship between shading coefficient and the annual unit external window area heating power consumption. In the direction of east, west and north, there is positive linear relationship between the annual unit external window area air-conditioning electricity consumption and shading coefficient. Heat transfer coefficient mainly affected the length of intercepts in these two cases. In the direction of south, in the process of the increase of annual unit external window area heating power consumption which is associated with the increasing of the shading coefficient, a critical phenomenon of sndden decrease can be detected. Taking the advantage of this phenomenon and selecting the shading coefficient in scientific way can reduce the cost about external window and the indoor power consumption.

关 键 词：遮阳系数 空调年耗电量 采暖年耗电量 临界现象 

分 类 号：TU201.5[建筑科学—建筑设计及理论]