About the author:

Fuzhou Strait Culture and Art Center Construction and Development Co., Ltd., Fuzhou, Fujian 350000, China

Abstract:

Enhancing the performance of building envelopes has become a key pathway for improvingenergy efficiency and promoting low⁃carbon development in green buildings. The New District·SanjiangTower, the first all⁃curtain⁃wall three⁃star green building in Fujian Province, presents significantchallenges for envelope performance due to its high window⁃to⁃wall ratio, fully glazed façade, and thehot⁃summer warm⁃winter climatic conditions. This study conducts optimization of the building envelope—including windows, curtain walls, exterior walls, and roof systems—through dynamic daylight simulation,wind environment simulation, and annual hourly energy⁃consumption simulation. Based on actualengineering implementation, a simulation⁃driven design⁃construction optimization⁃performance verificationtechnical framework is developed. The results show that by adopting multi⁃cavity thermal⁃break aluminumprofiles, triple⁃silver Low⁃E insulated glazing, a dual⁃layer sealing system, and high⁃performanceinsulation materials, the overall curtain⁃wall thermal transmittance is reduced to 2.278W/ (m2·K), andthe solar heat⁃gain coefficient decreases to 0.18. Dynamic optimization enables the daylighting⁃compliantarea to reach 90%, operable windows achieve an effective natural⁃ventilation pressure difference. Thebuilding􀆳s total annual energy consumption is reduced by 60.7%, and cooling energy consumptiondecreases by 68.74%. The study confirms the effectiveness of dynamic simulation in guiding high⁃performance and low⁃carbon envelope construction.