Analysis of the Influence of Thermal Performance of External Window on Building Heating Air Conditioning Load in Cold Area
[Purposes]By studying the impact of external window thermal performance on building heat-ing air conditioning load,the degree of influence of various external window thermal performance param-eters on building energy efficiency is obtained,which helps to improve building energy efficiency.[Meth-ods]Using DeST-h,the basic model of 75%energy-saving standard residential building in cold area(Zhengzhou)was established,and the single factor influence calculation was carried out with solar heat gain coefficient,window-wall ratio and external window heat transfer coefficient as variables,and the ef-fects of solar heating coefficient,ratio of window to wall and heat transfer coefficient of exterior windows on building heating air conditioning loads were studied by using multi-factor analysis.[Findings]The results showed that the influence of window-wall ratio and heat transfer coefficient on building heating air conditioning loads was obvious and positive correlation.The influence trend of solar heating coeffi-cient on heating and air conditioning loads was related to the window-wall ratio and storey the number of buildings.[Conclusions]In order to meet the higher energy-saving standard,the window-wall ratio and heat transfer coefficient should be given priority to the energy-saving of exterior windows,and the window-wall ratio and the number of buildings should be taken into account when determining the local solar heating coefficient.
solar heat gain coefficientarea ratioof window to wallheat transfer coefficientbuilding heat-ing air conditioning load
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