Folding-type groove-type solar heat collection system based on multiple reflections

Abstract

The invention relates to a folding-type groove-type solar heat collection system based on multiple reflections. The groove-type structure of the solar heat collection system adopts a groove-shaped steel frame structure with an approximate parabola shape and a reflecting thin film combination, the function of the solar heat collection system is similar to that of a groove-shaped paraboloid reflector. Heat collection method using the solar heat collection system comprises the following steps: sunlight is irradiated on the surfaces of the reflecting thin films; sunlight is reflected for multiple times after being gathered, and finally is reflected to the surface of a heat collector at the upper end of a middle stand column. The reflecting thin films can also be used for realizing the moving process of folding and unfolding, to seek advantages and avoid disadvantages, the reflecting thin films can be folded to be prevented from being damaged in a severe weather, the reflecting thin films can be better protected, and the service lives of the reflecting thin films are longer; moreover, the reflecting thin films are light in weight and low in price, can be rolled up, are convenient to transport, more convenient to install and maintain, and are low in production cost and maintenance cost.

Description

technical field [0001] The invention relates to a solar heat collecting system which utilizes a combination of a trough-shaped steel frame structure with an approximate parabolic shape and a reflective film to collect sunlight after multiple reflections and finally reflect it to the surface of a heat collector of an intermediate column. Background technique [0002] The existing trough solar collector system uses a mechanical tracking device that rotates with the movement of the sun to drive the trough-shaped parabolic condensing mirror to rotate, so that the sunlight vertically irradiates the trough-shaped parabolic condensing mirror, and the trough-shaped parabolic condensing mirror focuses the sunlight To the focal point or focal line of the paraboloid, a collector tube is installed at the focal point and focal line of the trough parabolic concentrator, and the collector tube absorbs solar energy to convert solar energy into heat energy. However, in the existing trough so...

AI Technical Summary

Problems solved by technology

However, in the existing trough-type solar heat collection system, heat collecting tubes must be placed at the focus and focal line of each trough-shaped parabolic reflector. The number of heat collecting tubes is large, and the cost is extremely high; The larger the area, the greater the spontaneous heat dissipation loss and the lower the light-to-heat conversion efficiency

The existing trough solar heat collection system can only absorb the sunlight in the front, but not the sunlight in the cosine direction, and the utilization rate of sunlight is low

The existing trough solar heat collection system has low mechanical transmission precision and cannot accurately track the sun. The mechanical equipment is heavy and takes up a lot of space. It is inconvenient to maintain and the maintenance cost is extremely high.

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