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Subcircular back-off heliostat

A heliostat and inverted buckle technology, which is applied in the field of heliostat devices for tower-type solar thermal power plants, can solve the problems of increasing heliostat maintenance costs, increasing the cleaning frequency of reflectors, and reducing the concentrating efficiency of mirror fields, etc. , to achieve the effect of shortening the debugging cycle, reducing the cleaning frequency and improving the efficiency of the mirror field

Active Publication Date: 2017-06-27
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common problem of these two types of heliostats is: when the heliostat does not need to work or is always in a protective posture in a windy environment, that is, the reflective surface of the heliostat is horizontal, so that dust is easy to accumulate on the surface of the reflector, making the A large decrease in reflectivity affects the light-gathering efficiency, or it is necessary to increase the mirror cleaning frequency, thereby increasing the maintenance cost of the heliostat; in addition, the mirror surface is rectangular, and when the mirror field is arranged, the adjacent heliostats It is easy to block light and shadow at the four corners of the rectangle, thereby reducing the light-gathering efficiency of the lens field
In terms of mirror assembly and overall spot adjustment, most current mirror structures require assembly and adjustment in sunny weather, which greatly increases the time for spot adjustment and increases labor costs

Method used

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  • Subcircular back-off heliostat
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  • Subcircular back-off heliostat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1 of the present invention is a U-shaped column symmetrically supported near-circular heliostat.

[0019] Overall structure of the present invention is as figure 1 and figure 2 shown. figure 1 is the front view of the structural diagram of the heliostat, figure 2 A rear view of the structure. The heliostat includes a reflector 1 , a U-shaped column 2 , an azimuth transmission device 3 , an elevation angle transmission device 4 and a mirror support 5 . The reflector 1 is formed by splicing several reflector units 11 in a linear array or a circular array, and the profile shape of the spliced ​​reflector 1 is circular or nearly circular, that is, no reflector units are arranged at the four corners of the reflector 1 . When several rows of heliostats constitute a heliostat field, the sunlight blocking and shadowing phenomenon can be reduced between the adjacent front and back rows of heliostats, the row spacing of heliostats can be reduced, and the concentr...

Embodiment 2

[0022] Embodiment 2 of the present invention is a three-point symmetrical support type heliostat, such as Figure 4 shown. When the size of the heliostat is large and the span in the horizontal direction is large, a three-point symmetrically supported heliostat can be used. That is, a central column 21 is added in the middle of the U-shaped column 2, and the axis of the central column 21 coincides with the output axis of the azimuth transmission device 3, which is the azimuth rotation axis. The height angle transmission device 4 is fixed on the top of the central column 21. The height angle transmission device 4 is a horizontal double output shaft, and the horizontal double output axis is the height angle rotation axis of the heliostat. Rotation supports 10 and 20 are used as auxiliary supports, fixed on the tops of both sides of the U-shaped column 2, which can reduce the deformation of the beam 51 and make the reflective surface shape of the reflector 1 controlled within th...

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PUM

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Abstract

The invention relates to a subcircular back-off heliostat. The subcircular back-off heliostat is formed by a reflector (1), a reflector support (5), a U-shaped column (2) and a driving transmission device, wherein the driving transmission device is arranged on the U-shaped column (2), and is connected with the reflector support (5); the reflector (1) is arranged on the reflector support (5). The subcircular back-off heliostat is characterized in that the reflector (1) is formed by splicing of a plurality of reflector units (11); the integral contour shape of the reflector (1) is circular or subcircular; the face type of one reflector unit (11) is a hook face or a plane; the reflector units (11) are connected with the reflector support (5) to form a combination body; the combination body formed by the reflector (1) and the reflector support (5) is symmetrically supported at two ends by means of the U-shaped column (2); the reflector (1) can rotate at least 180DEG in the elevation angle direction; and the reflector (1) can be displayed in a back-off attitude, that is, one side of the reflection plane of the reflector (1) faces the ground.

Description

technical field [0001] The invention relates to a heliostat device for a tower type solar thermal power station. Background technique [0002] The heliostat is a concentrator device used in a tower solar thermal power station, which reflects sunlight and focuses it into a heat absorbing device fixed at a certain height on the tower. Heliostats generally consist of reflectors, support structures, transmissions and control systems. The cost of heliostats accounts for more than 40% of the total cost of tower-type solar thermal power generation systems. Therefore, in order to reduce system power generation costs and promote the commercialization of tower-type solar power generation systems, it is necessary to improve the field concentration efficiency of heliostats and reduce the Sunglass material cost, processing cost, transportation cost, assembly and debugging cost, and maintenance cost, etc. In order to achieve the purpose of cost reduction, domestic and foreign heliostats...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02S40/22
CPCY02E10/52H02S40/22
Inventor 臧春城王志峰白凤武
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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