Film profile

Abstract

A film profile comprising a composite structure formed by a first film layer (102) and a second film layer (104). The surface shape of the film profile is a circular-arc surface shape. The film profile is a composite structure formed by bonding and curing the first film layer (102) and the second film layer (104) on a cylindrical surface shape mold. Compared with conventional parabolic reflectors having the defects of great weight, difficulty in processing and high cost, the film profile has the advantages of light weight, simplicity in preparation, convenience in control and low cost.

Description

technical field [0001] The invention relates to a film profile, in particular to a film profile with an arc surface. Background technique [0002] As a clean, non-polluting renewable energy source, solar energy is considered an important part of the world's energy strategy for its development and utilization. The utilization of solar energy mainly includes two categories: solar thermal utilization and solar photovoltaic power generation. In the utilization of solar heat, in order to obtain high-temperature steam, electric energy, etc., concentrating technology must be used. In solar photovoltaic technology, light concentrating technology is used to reduce the area of ​​photovoltaic cells used in a system, thereby reducing costs and achieving high photoelectric conversion efficiency. Therefore, the study of concentrating systems is an important research direction in solar energy utilization. [0003] For the solar concentrating system, a large parabolic concentrator is mai...

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Problems solved by technology

[0003] For the solar concentrating system, a large parabolic concentrator is mainly used at present, but its disadvantages are that the parabolic reflector is difficult to manufacture, the cost is high, the reflector is easily broken, and the windproof performance is poor, etc.

In recent years, the use of thin films as new substrates for concentrating devices is being further studied. For example, the Chinese patent application number 201010115538.9 discloses a thin-film solar reflection concentrating device, which uses a concentrating film, a surface-shaped bottom plate and a surface-shaped The fixed-focus bracket forms a reflective focusing device, but it still relies on a parabolic surface-shaped base plate and a surface-shaped fixed-focus bracket to form a parabolic reflective focusing device, which is relatively complicated to manufacture, and the parabolic focusing The light reflected by the device will cause the photovoltaic cell to be overheated locally, which will affect the service life of the photovoltaic cell

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