Application of sensitivity analysis in selection and economic analysis of insulating material in public institution

In order to analyse the energy saving effect and economic efficiency of insulating materials for public institutions envelope, sets an office building located in Tianjin as the case. Simulates the energy consumption of the insulation effect of building roof, exterior wall and external window through DesignBuilder when using different insulating materials, and carries out the economic analysis. Selects the optimal thickness by dynamic payback period. The results show that the public institutions in severe cold zone, external wall insulation should adopt EPS material, roof insulation should adopt XPS roofing material; external wall in cold zone should adopt PUR material; roof wall in hot summer and cold winter zone should adopt XPS material; while the aerated concrete is recommended as base structure of exterior walls and roof without the external insulation technology in hot summer and warm winter zone.