Raffles City Hangzhou deploys a sustainable strategy that not only the enhances energy efficiency of the building, but also improves the surrounding environment. The complex is perhaps most notable for its thermal storage system. By using this system, the total capacity of the electrical system is increased, and the operational cost is reduced, drawing power from of the storage system at peak times, when electricity tariffs are highest. The main effect of the chilled water storage system is to reduce HVAC system’s operational cost, recovering the cost of the additional by performing better than the comparable regular chilled water system.
In addition to providing a comfortable and efficient indoor conditioning, the project also undertook an enhancement of the microclimate in adjacent outdoor spaces. Based on computational fluid dynamics (CFD) simulation results, kitchen exhaust ducts and shafts were adjusted to avoid any negative effects of grease and odor on passers-by. To address the issue of PM 2.5 particulate matter in the air, the outdoor delivery monitoring devices and high-performance air filters with a Minimum Efficiency Reporting Value (MERV) of 13 were installed in primary air-handling units (PAUs) and air-handling unit (AHU) plants to enhance outdoor air quality.