Fig. 4. First floor plan after retrofit, showing interior courtyard.
For the top two floors, a new facade system was designed to provide appropriate visual environment for the
office areas and make full use of daylight to reduce energy consumption for lighting. Curtain wall system and
exterior horizontal sunshades system are combined together to achieve environmental optimization and energy
efficiency. The sunshades system is made of aerofoil-shaped blades connected to the framing system with mounting
arms and mounting brackets (Figure 5b). This shading system controls the direct solar exposure and glare, making
interior daylighting environment ambient and comfortable.
Fig. 5. (a) Improved facade system for the opaque exterior walls; (b) Curtain wall and shading system.