Photovoltaic stents have strict requirements on the performance of steel materials. Solar photovoltaic stent equipment steels should have the following properties:
First, tensile strength and yield point. The yield point height can reduce the section of the steel section, reduce the weight of the structure, save the steel, and reduce the overall project cost. High tensile strength can increase the overall safety of the structure and increase the reliability of the structure.
Second, plasticity, toughness and fatigue resistance. Better plasticity can result in greater deformation of the structure prior to failure, which can enable people to find and take remedial measures in time. The better plasticity can also adjust the local peak stress. In order to adjust the angle, the solar panel installation is often forced to install. The plastic properties cause the structure to produce redistribution of internal forces, so that the stress in some of the original stress concentration parts of the structure or component tends to Uniform, improve the overall bearing capacity of the structure. The better toughness can make the structure absorb more energy when it is destroyed under the impact of external forces. Especially for desert power plants and rooftop power stations with large wind power, the wind vibration effect is obvious. The toughness of steel can effectively reduce the degree of danger. The better fatigue resistance also allows the structure to have a stronger ability to withstand repeated changes in wind load.
Third, processing performance. Good processing properties include cold workability, hot workability and weldability. The steel used in photovoltaic steel structures must not only be easily machined into various forms of structures and components, but also require the unfavorable effects of these structures and components not being excessively strong, plastic, ductile, and fatigue-resistant.
Fourth, the service life. Since the design life of solar photovoltaic system is more than 20 years, good corrosion protection performance is also an important indicator to measure the quality of the support system. If the stent has a short life span, it will inevitably affect the stability of the entire structure, leading to an extended investment recovery period and reducing the economic benefits of the entire project.
Fifth, in line with the above conditions, the steel used for photovoltaic steel structure should also be easy to purchase, production, of course, the price is also very important.