Analysis of Energy-Saving Effects of Different Building Exterior Wall Insulation Materials

Building energy conservation plays an important role in building a low-carbon economy and maintaining sustainable economic development. And the reasonable selection and application of external wall insulation materials can effectively achieve the purpose of wall insulation, which is conducive to achieving energy conservation and emission reduction of the building envelope. Based on this, this paper selects a three-story residential building in Hangzhou as an example and uses the building energy consumption simulation software DeST-h to simulate the annual energy consumption of the building. The impacts of insulation layer thickness and materials on the external wall insulation effect and building energy consumption are analyzed in detail. The paper also describes the comprehensive comparison from the technical economy perspective. The results show that laying an insulation layer can effectively reduce building energy consumption. Compared with the external wall without a thermal insulation layer, 40 mm polystyrene particle thermal insulation slurry has the highest cost-performance ratio of 0.84, and the total load of the whole year is reduced by 19.7%.