The solar cell array bracket is used to support the solar cell array. The structural design of the solar cell array is to ensure that the solar cell array and the bracket are firmly connected, and the solar cell array can be easily replaced. The bracket and other required Materials (such as bolts) should be made of durable, rust-proof, UV-resistant materials. The solar array and bracket must be able to withstand 120km/h of wind without being damaged.
In the installation of the solar cell array bracket, all square array fasteners must have sufficient strength to securely fix the solar array to the bracket. The solar array can be mounted on the roof, but the bracket must be The main structure of the building is connected and cannot be connected to the roofing material. For the ground-mounted solar cell array, the minimum distance between the solar cell array and the ground should be more than 0.3m. The bottom of the column must be firmly connected. On the basis of, in order to withstand the weight of the solar cell array and withstand the design wind speed.
In the solar cell array structure design, a problem that needs to be very important is the wind resistance design. According to the technical parameters of the solar cell array manufacturer, the solar cell array can withstand the wind pressure of 2700Pa. If the wind resistance coefficient is selected At 27m/s (equivalent to ten typhoons), according to non-viscous fluid mechanics, the solar cell array is subjected to a wind pressure of only 365Pa. Therefore, the module itself can withstand a wind speed of 27m/s without damage. Therefore, The key to the design is the design of the solar cell array bracket, the basic design and the connection between the bracket and the foundation. The connection design of the solar cell array bracket and the foundation should be fixed by bolts.
The component mounting structure must withstand environmental stresses such as wind and snow. The mounting holes should be easy to install and adjust, and must withstand certain mechanical stresses. The correct installation of structural materials can minimize the corrosion of the component frame, mounting structure and materials. The solar cell array should be installed in such a way as to ensure maximum exposure to sunlight. Consider the change in the direction of sunlight incident during the day and the height of the winter and summer sun from the horizon during the year. In general, the component should be tilted towards the equator. Installation, that is, the light receiving surface of the northern hemisphere component should face south, and the light receiving surface of the southern hemisphere component should face north. Under normal circumstances, the angle between the component and the ground should refer to the local latitude ± (5 ° ~ 10 °).
The solar array is checked during the installation of the roof to ensure that the building and its structure (roof, appearance, load-bearing, etc.) required for the assembly have sufficient load-bearing capacity. When installing the components, ensure that the components are installed in the fire. The roof, and the roof is inclined at an angle of less than 5 in/ft to ensure its fire rating, and to ensure that it is safely fixed and not damaged by strong winds or heavy snow. When installing the roof, the roof to be penetrated when installing the fixed components should be appropriate. Sealed to prevent leaks.
The bracket for installing the solar cell array on the cement flat roof can be divided into two parts, one is the base part of the bracket, and the other is the bracket part. The base of the bracket is made of concrete mixed with C30, the base of the bracket (cement pier) The arrangement is shown in Figure 1. When the fence is too high or there are obstacles on the ground (lightning strips, conduits, bridges), brackets with raised feet can be used. The roof can be opened in double rows, and the back of the solar cell array Make sure the ventilation is smooth (the minimum separation between the components and the mounting surface is 10cm).
The brackets produced by different manufacturers are different. The brackets that are applicable according to the unique conditions of the site are also different. The installation diagram of the self-weighting bracket of the cement flat roof is shown in Figure 2.
