Aluminum Sunshade Louver

The energy conservation design of building envelope is linked by such factors as window opening, orientation, sunshade and thermal insulation materials, which affect the energy consumption of buildings. Among them, aluminum louver sunshade has the functions of preventing solar radiation, avoiding glare, improving indoor environment and climate, and the aesthetic effect of light and shadow on the building appearance, but it also has different levels of impact on indoor lighting and ventilation.

The aluminum louver sunshade system can minimize the direct sunlight and avoid indoor overheating, which is one of the main measures for building heat protection in hot areas. After sunshade is set, it will have the following functions and effects:

1.The effect of shading on solar radiation.

The thermal insulation performance of the peripheral protective structure is affected by many factors, among which the sunshade coefficient is the most influential index. Generally speaking, shading coefficient is controlled by material properties and environment.  The smaller the sunshade coefficient is, the smaller the solar radiation heat through the outer enclosure structure is, and the better the heat protection effect is.  It can be seen that the effect of aluminum sunshade louver on shielding the solar radiation heat is considerable, especially for glass curtain wall buildings.

2.The effect of shading on indoor temperature.

Aluminum sunshade louver has obvious effect on preventing indoor temperature from rising.  When there is shading, the room temperature amplitude is small, the time delay of maximum room temperature occurs, and the indoor temperature field is uniform. Therefore, sunshade can reduce the cooling load of air-conditioned rooms, so for air-conditioned buildings, sunshade is one of the main measures to save electricity.

3.The effect of shading on daylighting

From the point of view of natural lighting, it can prevent glare, and the illuminance distribution is relatively uniform, which can disperse the reflected light of the glass X of the glass wall (it is not the coated glass), avoiding the light blocking effect, thus reducing the indoor illuminance, especially in rainy days. Therefore, full consideration shall be given to the design of aluminum sunshade louver system to meet the requirements of indoor natural lighting as far as possible.

4.The effect of shading on building appearance.

It is generally believed that the design of glass curtain wall can only be flat, and it is impossible to design shading facilities such as external sunshade. However, from many cases abroad, we can find that metal glass curtain wall can be designed into a beautiful sunshade form with light metal plates and become an interesting part of the architectural modeling. The sun shading system forms a light and shadow effect on the glass wall of the glass curtain wall appearance, reflecting the aesthetic effect of modern architectural art. Therefore, in European architecture, the external sunshade system has been used as an active facade element, even called a double facade form. One floor is the facade of the building itself, and the other floor is the facade form of dynamic sunshade state.  This "dynamic" building image is not due to the fashion needs of building facades, but a new modern architectural form produced by modern technology to solve human needs for building energy conservation and natural enjoyment.

5.The effect of shading on room ventilation.

Sunshade facilities have a certain blocking effect on room ventilation. When windows are opened for ventilation, the indoor wind speed will be reduced by 22-47%, depending on the structure of the sunshade facilities. However, it blocks the rising hot air on the glass surface, which is unfavorable for heat dissipation. Therefore, attention should be paid to the structural design of sunshade.