The Impact of Exterior Windows and Shading on Building Energy Consumption

China's building carbon emissions are generally on a continuous growth trend. In 2017, it was 2.044 billion tons, an increase of approximately three times from 668 million tons in 2016, with an average annual growth rate of 6.8%, and building energy consumption accounted for 21.70% of the national energy consumption. Therefore, a typical single building in Wenzhou was selected as the research object, and based on Energy Plus software, the effect of thermal performance of exterior windows and shading on building energy consumption was simulated and studied. The study found that the most representative energy-saving combination of exterior windows is the combination of $\mathbf{u}=3.4$ PVC plastic steel type and Low-e high-transmittance glass, and the combination of $\mathbf{u}=2.8$ PVC plastic steel type and ordinary insulating glass; horizontal sun shading the most representative is the energy-saving combination forms are perspective ratios of 0.4 and 0.7, and sun visor pick out the height 200mm and 1100mm; the most representative energy-saving combination forms for vertical sunshades are perspective ratios of 0.3 and 0.4, and sun visor pick out the height 100mm and 1100mm; the most representative energy-saving combination form of integrated shading is perspective ratios of 0.3, and the pick-out size of the sun visor is 200mm, 1100mm and 1200mm; the most representative energy-saving combination form of the louvered shade is the perspective ratios of 0.3, 0.4 and 0.5, and the louver angle is 0°, 20° and $160^{\circ}$.