摘要
基于黄山建设大厦项目,在多因素条件下,如窗墙比、传热系数、形式与深度外遮阳板等,模拟研究南北向窗户对建筑采暖能耗、空调能耗与总能耗的影响,同时开展了经济性分析。研究发现,随着北向窗墙比的增大,建筑全年空调能耗均随之增大,且在相同条件下,外窗的传热系数减小,建筑的全年空调能耗并不一定都降低。南向外窗窗墙比从0.2增至0.6,传热系数为5.7 W/m^ 2·K、4.7 W/m^ 2·K、3.0 W/m^ 2·K、2.2 W/m^ 2·K、1.7 W/m^ 2·K时的采暖能耗分别下降了-2.66%、4.84%、9.84%、10.80%、12.96%,传热系数越小,采暖能耗下降幅度越大。窗墙比对空调能耗影响程度南向大于北向,总能耗与窗墙比成正相关。另外,水平遮阳板较垂直遮阳的节能效果好,且在0.8 m深度窗户传热系数为2.2 W/m^ 2·K时生命周期费用最低。以上5种传热系数下建筑南窗设置0.8m深度的水平遮阳板较未设置遮阳的总能耗分别减少了3.33%、4.37%、6.91%、8.94%、7.58%,建筑节能改造后全年单位面积采暖能耗、空调能耗、总能耗分别降低了34.08%、26.38%、30.65%。
Based on the Huangshan Construction Building project,under the conditions of multiple factors such as window-to-wall ratio,heat transfer coefficient,form and depth of external sunshade,the effect of north-south windows on building heating energy consumption,air conditioning energy consumption and total energy consumption were simulated Economic analysis.The study found that with the increase of the north-facing window-to-wall ratio,the building's annual air conditioning energy consumption increases,and under the same conditions,the heat transfer coefficient of the outer window decreases,and the building's annual air conditioning energy consumption does not necessarily reduce.The window-to-wall ratio from south to outside increased from 0.2 to 0.6,and the heating energy consumption at the heat transfer coefficients of 5.7 W/m^ 2·K,4.7 W/m^ 2·K,3.0 W/m^ 2·K,2.2 W/m^ 2·K,1.7 W/m^ 2·K decreased by-2.66%,4.84%,9.84%,10.80%and 12.96%respectively.The smaller the heat transfer coefficient,the greater the decline in heating energy consumption.The influence of the window-to-wall ratio on the energy consumption of the air conditioner is greater in the south than in the north,and the total energy consumption is positively correlated with the window-to-wall ratio.In addition,horizontal sunshade has better energy-saving effect than vertical sunshade,and the life cycle cost is the lowest when the heat transfer coefficient of the window at a depth of 0.8 m is 2.2 W/m^ 2·K.Under the above five heat transfer coefficients,the horizontal sunshade with a depth of 0.8 m in the south window of the building reduced the total energy consumption by 3.33%,4.37%,6.91%,8.94%,and 7.58%,respectively.The energy consumption for heating,air conditioning and total energy consumption per unit area decreased by 34.08%,26.38%and 30.65%respectively.
作者
储蔚
徐俊
王东红
王浩
胡浩威
CHU Wei;XU Jun;WANG Donghong;WANG Hao;HU Haowei(Anhui Advanced Technology Research Institute of Green Building,Anhui Jianzhu University,Hefei 230601,China;Urban Construction College of Anhui Jianzhu University,Hefei 238076,China;National Key Laboratory of Fire Science,University of Science and Technology of China,Hefei 230026,China;Anhui Provincial Architectural Design and Research Institute Co.,Ltd,Hefei 230002,China)
出处
《安徽工程大学学报》
CAS
2020年第5期51-57,94,共8页
Journal of Anhui Polytechnic University
基金
“十三五”国家重点研发计划基金资助项目(2017YFC0702600)
智能建筑与建筑节能安徽省重点实验室开放课题基金资助项目(IBES2018KF06)。
关键词
窗墙比
传热系数
遮阳板
生命周期费用
window to wall ratio
heat transfer coefficient
visor
life cycle cost
