Polished aluminum sheet for solar parabolic collector usually adopt 1060 and 3003 aluminum mirror sheet with high reflectivity. Reflectors used in solar thermal power stations or medium- and high-temperature solar thermal utilization projects has many types, in addition to glass mirrors and mirrors based on reflective film technology, mirror polished 4×8 Aluminum Sheet are also one of them.
High-reflectivity mirror polished aluminum sheet is a product made of aluminum as raw material. It is applied by vacuum magnetron sputtering process based on electronic evaporation aluminum technology. A layer of metallic aluminum is applied as a reflective layer, and a protective layer of titanium dioxide and silicon dioxide is plated thereon to form a highly reflective mirror aluminum sheet material having a reflectance of up to 95% ± 1%. The high-reflection mirror aluminum produced has a substrate width of less than or equal to 1250 mm and a thickness of between 0.3 mm and 1.0 mm. The polished aluminum sheet are packed in rolls for easy transport, the mirror is covered with a plastic film to protect the mirror from damage.
Solar-thermal power generation glass reflector commonly used thickness is 4 mm, weight is heavy, if the mirror polish aluminum sheet 0.8mm thick is used, its light at least three times more light than glass (according to alumina density 3.965 g/cm3, glass density of 2.8 g/cm3 rough estimate), even if add weight of the back, with high density polyurethane materials for example, the overall weight is less than pure glass mirror. The lower weight reduces the investment in the stent system, resulting in cost savings for the overall light field system. Especially for the construction of high and medium temperature solar energy collection projects on the roof of the building, due to the limited bearing capacity of the building, the adoption of polished aluminum sheet for solar brings market opportunities.
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