Ultra-low energy buildings adapt to climate characteristics and site conditions, minimize building heating, air conditioning and lighting requirements through passive building design, maximize energy equipment and system efficiency through active technical measures, and provide a comfortable indoor environment with minimal energy consumption.
 

The wallis one of the most important outer structures of residential buildings, and it is also the main index to evaluate the passive design effect. The heat transfer coefficient of the main section of external wall of this project is 0.13W/(m2·k). In view of the performance limitations of traditional molded polystyrene board, PIR materialis used in this projectto replace it, and through the improvement of foaming technology, the extraction rate was increased by 10% under the same compression strength, and thefire ratewas raised to B1 level. Compared with the traditional molded polystyrene board (thermal conductivity 0.030W/(m·k)), the PIR developedin this project has a lower thermal conductivity (0.020W/(m·k)), which can reduce the thickness of the insulation layer by 50mm and achieve CO2 reduction by reducing the amount of material.
 

Guoyue Tiansheng residential project has obtained multiple certifications such as German PHI, American LEED Gold, China Green ConstructionThree Star, and China ultra-low energy building. Through the application of ultra-low energy building technology, the energy consumption level of the project is equivalent to 94% of the relative energy saving rate of buildings in China, and the entire project can reduce more than 400 tons of CO2 throughout the year.