Spherical mirror combination type concentration power generation apparatus

Abstract

The invention provides a spherical mirror combined concentrated solar generation device comprising a photovoltaic concentrator, a sunlight receiver and a sunlight automatic tracker which can automatically track the sun in order that the photovoltaic concentrator points to the sun all the time, wherein the photovoltaic concentrator is composed of a plurality of spherical mirrors, the position of each spherical mirror ensures that the shape and position of the incident sunlight is basically consistent with those of the sunlight receiver outer surface when the incident sunlight are concentrated to the sunlight receiver outer surface. The spherical mirror combined concentrated solar generation device of the invention improves the photovoltaic concentration multiple, the light intensity distribution is even, at the same time the precision requirement for the tracker is not high.

Description

technical field [0001] The invention relates to a solar power generation device, in particular to a spherical reflector combined type concentrating power generation device. Background technique [0002] Concentrating solar photovoltaic power generation can greatly reduce the cost of photovoltaic power generation. With the continuous improvement of the efficiency of new high-efficiency concentrating cells, concentrating power generation systems will become more and more important in the field of solar photovoltaic power generation. There are many forms of concentrating optical systems. At present, the main application is the parabolic reflective point focusing system. The advantages of this system are: easy maintenance (battery can be replaced); easy to upgrade (higher efficiency battery can be replaced); concentrating The magnification is variable; the cost is low (the cost of the reflector is low, the condensing magnification can be high, and the demand for batteries is re...

AI Technical Summary

Problems solved by technology

But there are also the following disadvantages: First, when a long focal length reflector is used, the light intensity is relatively uniform, but it requires high tracking accuracy, and the length of the focal length is limited by the divergence angle of sunlight (+ / -0.26 degrees); second, When a short focal length mirror is used, the light intensity is severely uneven, but the tracking accuracy is relatively low. At this time, a more complex secondary optical system is needed to improve the uniformity of light intensity, but its effect is limited and the system is complicated; three. The manufacturing precision of the reflector is high, and local errors will lead to uneven energy distribution on the surface of the battery and reduce power generation efficiency

[0003] It can be seen from experiments that the shorter the focal length, the more uneven the energy distribution. When the focal length is smaller than the diameter, the unevenness of light intensity can no longer be used (because there is a large distortion)

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