Exterior insulation layer is the main form of Building energy efficiency design in public building,which can significantly reduce the energy consumption and save operating costs.However,during the design of Exterior insulation layer,the energy efficiency and economy of the project must be concerned,to determine the economic thickness of the insulation layer.In this paper,the economic thickness calculation of exterior insulation layer in public building is studied combined with an example of office building,the calculation model of economic thickness based on life cycle cost analysis method is established,which provide the theoretical guidance for the design of exterior insulation layer in public building.%外墙保温层是公共建筑节能设计的主要形式,可显著降低建筑能耗,节约运营成本.在进行外墙保温层设计时需综合考虑项目的节能性和经济性,以确定保温层的经济厚度.以某办公楼为例,对公共建筑外墙保温层的经济厚度计算方法进行研究,并建立基于全寿命周期费用分析方法的保护层厚度计算模型,可为公共建筑外墙保温层设计提供参考.
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