Aluminum alloy in the photovoltaic field is mainly used in solar photovoltaic frame and solar aluminium structure. Solar photovoltaic frame and solar bracket mainly play a role in fixing and sealing the solar cell module, enhancing the strength of the module, facilitating transportation and installation, etc. Its performance will affect the life of the solar cell module.Of course, in the photovoltaic frame, there are other kinds of photovoltaic frame, such as: steel frame, polymer material frame and glass fiber reinforced plastic frame, but because of the aluminum alloy solar panel structure light weight, corrosion resistance, easy to form, high strength, easy cutting and processing, recycling and other characteristics, currently in the solar frame application for the most common.

1) Recovery analysis of aluminum alloy frame and steel frame

Due to the corrosion resistance of aluminum alloy, it is close to infinite recycling, with very little consumption. According to the International Aluminium Association, 75 per cent of the 1.5bn tonnes of aluminium produced in the world's history is still in use. Due to the corrosion of steel, the recovery rate has been maintained at the level of 55-65%, which can not be effectively improved

2) Analysis of recycling energy consumption of aluminum alloy frame and steel frame

Under the "dual carbon" background, aluminum alloy also has lower recycling energy consumption and recycling carbon emissions in the recycling process. Compared with recycled steel, the carbon emission of recycled aluminum is 0.23t, which is only 22.3% of that of recycled steel

3) Full life cycle of aluminum alloy frame and steel frame

Aluminum alloy frame has a lower carbon emission factor. In order to show its carbon emission effect more directly, taking 1GW component as an example, the carbon emission data of aluminum frame and steel frame of power station were converted, and it was found that the carbon emission factor of aluminum frame was only 52.5% of steel frame in the whole life cycle, and the carbon emission was lower.

4) Other influencing factors of carbon emissions

The density of steel frame is higher and the components are heavier, which increases the carbon emission of transportation, handling and installation correspondingly. Here, the carbon emission of transportation is calculated as an example.

The elastic module of aluminum alloy frame is close to that of glass, and it has better synchronous deformation ability. Steel frame elastic modulus is too large, coupled with low processing accuracy, wind pressure, snow load, easy to produce stress point, resulting in component burst plate.