Curved condenser lens used for concentrating solar module

Abstract

The invention discloses a curved condenser lens for a concentrating solar module. The curved condenser lens comprises a curved substrate, a thin film sheet and a reflection layer, the reflection layeris previously arranged on one side of the thin film sheet, the other side of the thin film sheet is pasted on a curved surface of the curved substrate which is a free-form surface or a paraboloid. The curved substrate is small in size, low in precision requirements and large in tolerance, so that system precision and accuracy are benefited, equipment cost is lowered, and mass production facilitated; the reflection layer is arranged on the curved surface, so that secondary light loss is avoided, and high lighting effect utilization rate is realized; the free-form surface or the paraboloid is utilized as the substrate, so that light concentration can be upward, or downward or sideward and can be flexibly adjusted to match with a module structure; the solar module is small in occupied spaceand material utilization amount and light in weight; by coating the reflection layer on the thin film sheet, direct film coating on the curved surface is avoided, film coating difficulty is lowered, stable film coating is realized, mass production is facilitated, and equipment cost is reduced greatly.

Description

technical field [0001] The invention relates to the technical field of concentrating solar energy, in particular to a curved concentrating mirror used in a concentrating solar module. Background technique [0002] At present, most of the concentrating mirrors used in high-power concentrating solar energy on the market are Fresnel mirrors, which use curved or hyperboloid mirrors as the shape of the substrate, and the substrate materials are mostly glass, aluminum, PMMA (acrylic) or SOG (silicon-glass bonding) Structural materials), the above materials are used for concentrating light after surface treatment and other processes. The Fresnel lens is too much affected by temperature, the focus is uncertain, and it is easy to cause excessive loss of secondary light and energy. The requirements for materials are also too high, so the defect rate during production is high, the cost is too high, and mass production is difficult. Coating on curved surfaces is difficult, which incre...

AI Technical Summary

Problems solved by technology

The Fresnel lens is too much affected by temperature, the focus is uncertain, and it is easy to cause excessive loss of secondary light and energy. The material requirements are also too high, so the defect rate is high during production, the cost is too high, and mass production is difficult

It is difficult to coat curved surfaces, which increases the cost of coating equipment

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