PV mounting stringent performance requirements for steel, solar photovoltaic equipment steel bracket should have the following properties:
1) tensile strength and yield point. High yield point steel member can be reduced section to reduce the structural weight, saving steel, lower overall project cost. High tensile strength can increase the overall safety margin structure to improve the reliability of the structure.
2) ductility, toughness and fatigue resistance. Good plasticity can make the structure before the damage resulting large deformation, which allows people to discover and take remedial measures. Good plasticity can adjust the local peak stress, itself often installed solar panels in order to adjust the angle, the use of forced installation, and the structure can produce plastic redistribution of internal forces, stress or structural member so that some portion of the original stress concentration tends uniform, to improve the overall bearing capacity of the structure. Good toughness can make the structure was destroyed when under load absorb more impact energy in force, in particular a wind power plant large desert power plants and rooftop wind vibration effect is obvious, the toughness of the steel can effectively reduce the level of risk. Good fatigue resistance also can make the structure has a strong ability to resist repeated alternating wind loads.
3) processing performance. Good processing properties include cold working properties, hot workability and weldability. PV steel used steel not only easily processed into various forms of structures and components, but also the need for these structures and components are not caused by strength, ductility, toughness and fatigue resistance due to the adverse effects of too much processing.
4) life. Because of the design service life of solar photovoltaic systems in more than 20 years, and therefore good corrosion resistance is also an important indicator of the quality of the stent system. If the carrier lifetime is short, it is bound to affect the stability of the whole structure, resulting in extended payback period and reduce the economic benefits of the project.
5) Subject to the above conditions, the photovoltaic steel steel also should be easy to purchase, production, and also cheaper.
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