The insulation of glass curtain wall can be achieved in the following main ways:

Use insulating glass:

Insulating glass: It is composed of two or more layers of flat glass. High-strength and high-airtightness composite adhesive is used to bond and seal two or more pieces of glass with sealing strips and glass strips on all sides. Dry gas is filled in the middle, and desiccant is filled in the frame to ensure the dryness of the air between the glass sheets. For example, the common double-layer insulating glass can effectively block heat transfer and reduce indoor and outdoor heat exchange.

Coated glass: The optical properties of the glass are changed by coating one or more layers of metal, alloy or metal compound film on the surface of the glass. For example, Low-E glass (low-emissivity glass) is coated with a silver-based low-emissivity film on the surface, which can reflect indoor far infrared rays, prevent indoor heat loss, and effectively block outdoor heat radiation from entering the room.

Laminated glass: PVB film is sandwiched between two or more pieces of glass, which has good heat insulation, sound insulation and safety performance.

Add sunshade facilities:

External sunshade: sunshades, sunshade blinds, etc. are installed outside the glass curtain wall to directly block sunlight. Common ones are horizontal sunshades, vertical sunshades and integrated sunshades. For example, in some high-rise buildings, metal sunshade blinds with adjustable angles are installed on the facade.

Internal sunshade: curtains, blinds, etc. are installed indoors to play a certain role in sunshade and heat insulation. For example, electric blackout curtains can adjust the light and heat insulation effect as needed.

Ventilation design:

Natural ventilation: Rationally design the opening fan of the curtain wall, use the flow of natural wind to take away heat, and improve the indoor thermal environment.

Mechanical ventilation: By installing ventilation equipment such as exhaust fans and ventilators, indoor and outdoor air exchange is strengthened to reduce indoor temperature.

Use insulation materials: Fill the curtain wall frame with insulation materials, such as rock wool, polystyrene foam boards, etc., to reduce heat conduction through the frame.

Use insulation strips at the connection between the glass and the frame to prevent heat transfer.

Optimize the curtain wall structure:

Increase the thickness of the air interlayer of the curtain wall: Properly increasing the thickness of the air interlayer can improve the thermal insulation performance.

Use thermal insulation curtain wall frames: Thermal insulation frames such as thermally insulated aluminum alloys can effectively reduce the conduction of heat through the frame.

For example, the glass curtain wall of the Shanghai World Financial Center uses a combination of multiple thermal insulation technologies, including high-performance hollow Low-E glass, external sunshade shutters and reasonable ventilation design, which effectively reduces the indoor air conditioning load and improves the energy saving effect of the building.