How to solve the problem of energy waste in glass curtain wall

[China Glass Network] While glass architecture is pursuing transparency, a big problem encountered is the waste of energy. Large-area glass has caused a large demand for air-conditioning energy. How to balance transparency and energy conservation is one of the major topics in glass curtain wall technology research in recent years. To sum up, there are several solutions to the energy-saving problems of glass curtain walls:

Double-layer glass curtain wall construction method

This is a more common solution. The specific method is: leave a certain space between the two glass curtain walls, and at the same time, the bottom and top of the glass curtain wall are designed with ventilation devices to adjust the temperature of the interior space of the curtain wall to create a buffer space for indoor and outdoor temperature difference, thereby improving the insulation of the glass curtain wall. Thermal physical properties.

Use insulating glass material

More common is a layered glass called Low-E glass, which solves this problem to some extent. It is a laminated glass made of a metal component such as silver in the glass, which has a blocking effect on the long wave of visible light and can lower the thermal transmittance of the MUM. Although the glass itself has a faint green color, when it looks out to the bright outdoor, it does not feel the difference with ordinary transparent glass, but the radiant heat through the glass transparent room is only about 40%, which has better heat insulation function. This is a relatively simple and easy method. By selecting different glasses and solving the energy consumption problem to a certain extent, it is widely used in the design of contemporary glass curtain wall architecture (the light transmittance of Low-E glass is 67). %, the radiant heat transmission rate is 0.41; the ordinary enamel glass has a light transmittance of 79% and a radiant heat transmittance of 0.73).

Natural ventilation system design

The glass curtain wall is generally a fully enclosed wall, which brings the design of the ventilation system. The use of air-conditioning air supply systems will bring about a large amount of energy consumption. Therefore, the effective design of natural ventilation systems is an important part of the energy-saving design of curtain wall buildings.

Integrated design with solar energy utilization

The solar cell and the glass material are combined into a composite glass, and the composite wall is used for the curtain wall design, which can meet certain lighting requirements (the light transmittance is relatively low, generally about 12%), and a large amount of sunlight can be transferred. This is an energy source that can be utilized. This method is still in the exploration stage and has not been widely used. However, this design method of integrating solar energy utilization with architectural design provides a positive idea for the energy-saving design of glass curtain wall.

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