Solar simulator

Abstract

The invention provides a solar simulator. The solar simulator comprises a light source, a light opening angle correcting device, a light intensity homogenizing device and a light collimation device. Circular light spots formed by the light source have a first opening angle. The light with the first opening angle is irradiated into the light opening angle correcting device. The light opening angle correcting device corrects the light with the first opening angle into approximately parallel light. According to the solar simulator, the opening angle of the light is corrected through the light opening angle correcting device, the light penetration rate is increased, and the efficiency of the light passing through a light homogenizing component and a light collimation component is improved. By adopting the light source with a large opening angle, the light interception rate can be increased, light loss of the light source is reduced, the energy utilization rate is increased, and the penetration rate of the light passing through the light homogenizing component and the light collimation component cannot be reduced. A linear Fresnel lens is adopted as the light collimation component, the cost is low, and installation and adjustment are easy, fast and convenient. The solar simulator has two purposes and can be switched to be a collimation type solar simulator or a disc type solar simulator, so that the solar simulator is convenient and fast to use, and the usage cost is reduced.

Description

technical field [0001] The invention relates to the technical field of solar energy, in particular to a solar simulator. Background technique [0002] The collimated solar simulator is generally used in the field of low energy flux density testing of solar energy. It is used to directly simulate the outdoor sunlight, and the pursuit is the same uniformity and parallelism as the outdoor sunlight. The light emitted by the light source of the collimated solar simulator has a certain opening angle, which increases the aperture ratio of the lens in the optical path, that is, the ratio of the diameter of the lens to the focal length increases, which deviates from the optimum value of the aperture ratio, and the light In addition, the uniform light components and collimator components in the simulator have certain requirements on the parallelism of the light incident on the surface. The better the parallelism of the light rays, the better the optical efficiency of the light uniform...

AI Technical Summary

Problems solved by technology

[0003] In addition, the whole system of the collimating solar simulator should follow the principle of pupil connection, the aperture of the lampshade should not be too large, and the depth should not be too deep, so that the inner surface of the lampshade has a low interception rate of light, resulting in low overall efficiency (generally, the system efficiency is less than 12 %, for example, the overall efficiency of the most advanced simulator KM6 system in my country is 10.5%), which significantly pushes up the system cost and reduces the performance

Although the dish solar simulator has a high concentration ratio and high overall efficiency (generally the overall system efficiency is greater than 20%, for example, the overall efficiency of the simulator at the University of Minnesota is 29%), but due to the large opening angle of the light source of the dish solar simulator , it is not suitable to be used directly as a light source in a collimated solar simulator, otherwise it will affect the light transmittance and optical component efficiency of the collimated simulator. Therefore, how to improve the light transmittance of the collimated solar simulator Along with the efficiency of optical components, improving the overall efficiency of the simulator is also a subject of research

[0004] Furthermore, traditional collimating solar simulators generally use off-axis reflective collimating systems, which are complex and expensive to manufacture, install, and debug.

And in the field of solar indoor testing, there is no multi-purpose solar simulator that can simultaneously cover high, medium and low energy flux density tests

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