Study on ventilated double-skin design and its impact on building energy consumption and hygrothermal environment

The construction industry is facing increasingly severe energy pressures, and architectural design innovation is crucial for achieving functional integration and optimizing energy performance. Leveraging solar energy to create multifunctional building facades, effectively regulating building energy consumption and indoor hygrothermal, has become a new direction for energy conservation and emission reduction in the construction industry. However, current bottlenecks in this field, such as unclear regulatory mechanisms and low solar energy utilization per unit area, have hindered the application and development of related technologies. To address these challenges, this study proposes a DSF design that combines aesthetic appeal with power generation, heat collection, and humidity regulation functions. Comparative experiments were conducted between rooms using this DSF and reference rooms, systematically analyzing indoor hygrothermal variations and energy consumption under different weather conditions. Experimental data show that under sunny and foggy weather, the peak temperature of the experiment room rose by 4.9 °C, the duration of optimal humidity was extended by 29.86%, and energy saving was 45.94%; under rainy weather, the peak temperature difference decreased to 5.9 °C, the humidity decreased by 7.3%, and energy saving was 7.37%; under cloudy weather, the peak temperature increased by 1.2 °C, the humidity decreased by 12%, and energy saving was 11.88%. The findings confirm that this design effectively enhances the indoor hygrothermal environment and lowers energy consumption in the heating season. With significant scientific and practical value, this work supports energy-efficient construction and retrofitting while also adding to the theoretical underpinnings of building envelope design.