Solar furnace adopting self-spinning and elevation tracking mode

Abstract

The invention relates to a solar furnace adopting a self-spinning and elevation tracking mode, and the solar furnace comprises one or a plurality of focusing heliostats and a small collecting mirror, wherein the focusing heliostats track the sun, and collect and reflect sunlight onto the small collecting mirror, and the sunlight is subjected to secondary condensation by virtue of the small collecting mirror. Each light converging heliostat is a focusing heliostat without a light image, is formed by sub-mirror arrays and performs double-axle track, and sub-mirrors can rotate in the line and row directions and can be used for correcting focused light spots at any time when the focusing heliostats track the sun. The solar furnace is characterized in that the rotation of the sub-mirrors in the line and row directions can be realized by adopting a non-linear cam to push the sub-mirrors, and the focusing heliostats adopt a self-spinning and elevation method to track the sun. According to the solar furnace disclosed by the invention, the cost performance is improved, so that the solar furnace is universal, and the solar furnace is suitable for being applied to metal material purification based on solar energy, solar photoelectricity, solar optothermal, solar incinerators and the like, so that the industrial application prospect of the solar furnace is wide.

Description

technical field [0001] The invention relates to a solar concentrating device, a device capable of tracking the sun, concentrating sunlight at a high magnification and generating high temperature by using the concentrated sunlight, especially a device that adopts a spin elevation angle tracking method and a determinant motion aberration correction method solar furnace. [0002] Background technique [0003] Existing photothermal technologies that use concentrated sunlight to generate high temperatures involve the use of sun trackers and reflective (eg, parabolic dish or trough) or transmissive (eg, Fresnel lenses) concentrators. In large-scale (thermal power>10kW) solar thermal applications, devices with high concentration ratios can reach temperatures above 1500°C. This type of solar concentration device is called a solar furnace. The solar furnace of traditional technology has two optical structures: [0004] The lighting surface of a solar furnace is a reflective par...

AI Technical Summary

Problems solved by technology

Its disadvantage is that the inconvenience brought by the application of the target suspended in the air and always moving greatly limits its application range. For example, it is difficult to carry out applications in metallurgy and high-temperature metal coating.

Its disadvantage is that the optical precision requirements of its huge parabolic mirror will greatly increase the manufacturing cost; the two-stage structure also makes the whole system very large and complex, and the cost of materials and maintenance is very high

These two characteristics lead to the following insurmountable problems in the above-mentioned solar furnace: ordinary spherical or flat reflectors cannot overcome the aberration caused by the movement of the sun, and due to the off-axis effect of the incident light, the heliostat forms a The size of the spot of the heliostat changes greatly within a day, and the azimuth + elevation tracking system cannot guarantee that the incident light and reflected light at the center of the heliostat are always located in the meridian plane, so the concentrated light intensity and the light in the concentrated area The density fluctuates greatly, and the light-to-heat conversion efficiency is not ideal

Such a design not only increases the manufacturing cost, but also reduces the stability of the work.

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