Technical Research on Rock Wool/Polyurethane Composite Insulation Board and External Insulation System Applied in Ultra-low Energy Buildings

Abstract

Ultra-low-energy building refers to building adaptable to climatic characteristics and natural conditions, adopting envelope of high thermal insulation and air tightness performance as well as efficient fresh air heat recovery technology to minimize heating and cooling demand of building, and fully utilizing renewable energy to provide a comfort indoor environment with less energy consumption. External wall heat transfer coefficient K, as a key technical part of ultra-low-energy building system, is far higher than K value of ordinary energy-saving buildings in China. In this sense, ultra-low-energy buildings is demanding on thermal insulation materials of building envelope and its external insulation system which can meet required insulation property. This paper studies and develops a new kind of external thermal insulation composite material made of rigid foam polyurethane and rock wool and studies the application of the composite material in ultra-low-energy building external thermal insulation system