Trough-type consequent focus solar condensator for axial light transmitting

Abstract

The invention provides a trough-type consequent focus solar condensator for axial light transmitting, belonging to the technical field of solar condensing and solar medium-high temperature heat collection. The trough-type consequent focus solar condensator is formed by connecting a trough-type consequent condensator, a light guide, a light pipe and a heat collector, etc. After entering the trough-type consequent condensator, the sunlight is reflected by the inner surface of the trough-type consequent condensator and focuses on the focus line of the trough-type consequent condensator; the outer wall of the light guide is provided with a gap through which the rays enter; the gap coincides with the focus line; the light enters the light guide via the gap, is projected on the inner wall of the light pipe after being reflected by the light guide, is reflected by inner wall of the light pipe and is axially transmitted, and finally enters the heat collector, thereby realizing solar high temperature collection. The trough-type consequent focus solar condensator can collect the sunlight with low energy-flux density in a very small zone after reflection and axial transmission so as to form high temperature heat energy.

Description

Technical field [0001] The invention relates to a solar concentrator, in particular to a solar energy utilization device which utilizes a structure composed of a concentrator and a high-temperature concentrator to realize high-density concentration of sunlight and generate high-temperature heat energy. The invention belongs to the technical field of solar concentration and solar high temperature heat utilization. Background technique [0002] Among the medium and high temperature solar collectors currently popularized and used, there are mainly two types: rotating parabolic reflective point focus and two-dimensional parabolic trough reflective line focus (also known as trough concentrator). The advantage of the former is that the heat collecting temperature is high, and the disadvantage is that the scale of the device is limited and the process is complicated. The advantage of the latter is that it can be installed on a large scale, and the process is relatively simple. The...

AI Technical Summary

Problems solved by technology

Since the solar receiver is above the paraboloid, the solar receiver will generally leave a shadow on the paraboloid, thus blocking part of the collection of sunlight

In addition, for high latitudes and winter with a small solar altitude angle, no matter how the trough concentrator is placed, most of the time the sunlight is obliquely incident on the concentrator. At this time, the movement of sunlight in the device The route becomes longer, which increases the system's requirements for tracking accuracy

And because the solar receiver is above the parabola, its environment is even worse, it will experience wind and rain, and it will generate radiation heat exchange with the sky, thus reducing some of the efficiency

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