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Heliostat angle deviation detection method for tower type solar thermal power generation system

A tower type solar energy and thermal power generation system technology, applied in the field of heliostat angle deviation detection, can solve the problems of heat absorbers that cannot contribute heat, errors, etc.

Active Publication Date: 2012-06-20
邵文远
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are four disadvantages of this method: first, once there is an error, it must be adjusted manually; second, an error will also occur when moving up; third, only one heliostat can be adjusted at a time; heater

Method used

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  • Heliostat angle deviation detection method for tower type solar thermal power generation system
  • Heliostat angle deviation detection method for tower type solar thermal power generation system
  • Heliostat angle deviation detection method for tower type solar thermal power generation system

Examples

Experimental program
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Effect test

Embodiment 1

[0077] control Figure 5 , the tower solar thermal power generation system includes a tower T, a heat absorber H and a heliostat M. The first imaging unit E is fixed on the central area of ​​the heat absorber H on the tower T, and several heliostats are arranged under the tower according to the setting method to form a mirror field (it is possible that several heat absorbers H are fixed around the tower T, and the mirror field The sub-rings are distributed around the lower part of the tower, and each heat absorber corresponds to a part of the mirror field. This embodiment takes a heat absorber and the corresponding mirror field as an example). k-th heliostat M k The mirror faces the heat absorber H, and forms a light spot on the heat absorber by reflecting the sun's rays. The heliostat M k The position is fixed and can be rotated horizontally and vertically. The axis Z of the horizontal rotation and the axis X of the vertical rotation pass through the mirror center Q k . ...

Embodiment 2

[0084]This embodiment is based on the fact that the first lens E in the above embodiments is located in the central area of ​​the heat absorber, which will affect the heat absorption effect, and the temperature is very high, which will affect the life of the lens. Therefore, in this embodiment, several second lenses, second cameras, or several second cameras are provided on the basis of the foregoing embodiments. Distribute several second lenses F around the periphery of the heat sink to form a "fence", see Figure 11 , the distance between the two second lenses F is smaller than the width or height of the minimum reflected light spot. Therefore, the imaging unit of this embodiment actually includes two parts, the first imaging unit and the second imaging unit consisting of several second lenses, second cameras or several second cameras and a computer.

[0085] Initially use the first imaging unit and the second imaging unit to take pictures of the corresponding mirror fields...

Embodiment 3

[0090] This embodiment is a method for correcting errors caused by movement when the imaging unit in the above embodiments moves relative to the mirror field.

[0091] The movement of the first imaging unit will cause imaging deviation, that is, the images formed after the two movements are different, which will directly affect the accuracy of the calibration; strong wind or mechanical reasons will also cause the images of the first and second imaging units error. The following method can be used to solve this problem: install no less than 3 controllable laser emitters (or high-brightness light-emitting devices) that are not in a straight line at some fixed positions without heliostats in the mirror field, and the beams emitted by them can The first and second imaging units are covered, and the light emitting frequency of the controllable laser emitter or the high brightness light emitting device corresponds to the shooting time interval. Use the first imaging unit and the se...

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Abstract

The invention relates to a heliostat angle deviation detection method for a tower type solar thermal power generation system. The power generation system comprises a heat absorber fixed on a tower, and plural heliostats, and is provided with an imaging unit which includes a lens, a camera or video camera connected with the lens and a computer connected with the camera or video camera. The lens is arranged in the center of the heat absorber or around the periphery of the heat absorber. The process, for determining whether the heliostat face position is correct by means of images picked up by the imaging unit, comprises (1) establishing the central coordinate of each heliostat in the heliostat field; (2) looking for the central coordinate of the virtual image of the sun or the virtual image of the sun from the images picked up when the system is operating; and (3) determining the coincidence degree between the virtual image center of the sun and the heliostat face center or whether there is a virtual image of the sun to determine whether the heliostat angle is correct. Advantages of the method of the invention include improved detection efficiency, automation degree and accuracy.

Description

[0001] technical field [0002] The invention relates to a solar thermal power generation system, in particular to a detection method for a heliostat angle deviation of a tower type solar thermal power generation system. Background technique [0003] At present, there are mainly two types of solar thermal power generation: trough type and tower type. The trough type structure is relatively simple, but the temperature of the heat absorber can only reach above 200°C, and the power generation efficiency is low. The tower structure is relatively complex, but the temperature of the heat absorber can generally reach above 500°C, and the power generation efficiency is high. [0004] The principle of tower-type solar thermal power generation technology is to use heliostats to reflect sunlight to a heat absorber located on a high tower to achieve large-capacity power generation. The power station system includes heliostat field, heat absorber, heat storage device and power generatio...

Claims

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Application Information

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IPC IPC(8): G01C1/00
CPCF24J2/542F24J2002/385F24J2/38F24J2/16Y02E10/47F24S23/77F24S30/452F24S50/20F24S2050/25
Inventor 邵文远
Owner 邵文远
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