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Heliostat device with variable transmittance and control method

A light-transmitting device and control method technology, applied in solar collector controllers, solar ray concentration, lighting and heating equipment, etc., can solve the problem of inability to accurately adjust the local load of the heat absorber and the uneven temperature of the heat absorber peripheral surface , Inability to accurately restore concentrated light and other problems, to achieve real-time precise thermal load control, easy manual control, and cost-saving control effects

Active Publication Date: 2022-07-12
ZHEJIANG SUPCON SOLAR TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there may be problems such as improper scheduling of large-scale mirror field automation, resulting in uneven temperature on the surface of the heat sink.
In the face of such problems, traditional heliostat mirror fields often have the problem of being unable to accurately and quickly restore light concentration or accurately adjust the local load of the heat absorber, resulting in a decrease in the overall photothermal efficiency during the operation of the heat absorber

Method used

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  • Heliostat device with variable transmittance and control method
  • Heliostat device with variable transmittance and control method
  • Heliostat device with variable transmittance and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] This embodiment provides a heliostat device with variable transmittance, see figure 1 , figure 2 , the heliostat device includes a heliostat main body 100, the heliostat main body includes a variable light transmission device 110 for changing the transmittance and a reflection part 120 for reflecting incident light, and the variable light transmission device 110 is provided with At a predetermined position of the heliostat main body 100 close to the front, the reflection part 120 is set at a predetermined position of the heliostat main body 100 close to the back, wherein, by controlling the variable light transmission device 110 to change the transmittance of the incident light, Thus, the effect of controlling the reflectivity of the heliostat device is achieved.

[0055] In this embodiment, by controlling the variable light transmission device 110 to change the light transmittance, the effect of controlling the reflectivity of the heliostat device is achieved, so tha...

Embodiment 2

[0073] This embodiment provides a heliostat device with variable transmittance, see image 3 , the heliostat device of this embodiment is similar to that of Embodiment 1, and the difference lies in the structure of the variable light transmission device 110 and the principle of changing the light transmittance.

[0074] The variable light transmission device 110 in this embodiment includes at least two polarizing lenses with functions of shielding and transmitting incident light, and also includes a driving mechanism for driving the polarizing lenses to rotate to change the relative positions between the lenses 170; when the driving mechanism 170 drives the relative position of one of the polarizing lenses, the angle between the grating of the polarizing lens and the grating of the other polarizing lens is deflected, so that the polarizing lens and thus the transmittance of the variable light transmission device 110 is deflected. The luminosity changes, thereby achieving the e...

Embodiment 3

[0083] This embodiment provides a heliostat field, including several heliostat devices with variable transmittance as described in Embodiment 1 or Embodiment 2, wherein the power supply form of each heliostat device can be uniformly powered and distributed. The voltage of each heliostat device or the voltage of heliostats in a certain partition can be independently controlled in real time according to the load requirements of the heat absorber in different situations.

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Abstract

The invention discloses a heliostat device with variable light transmittance, comprising a heliostat main body, the heliostat main body comprising a variable light transmittance device for changing light transmittance and a reflection part for reflecting incident light, The variable light transmission device is set at a predetermined position of the heliostat body close to the front, and the reflection part is set at a predetermined position of the heliostat body close to the back, wherein by controlling the light transmittance of the variable light transmission device, the To achieve the effect of controlling the reflectivity of the heliostat device. A method for controlling the reflectivity of the heliostat device is also disclosed. The heliostat device of the present invention can change the light transmittance of the variable light transmittance device in a stepless, rapid and accurate manner for the full mirror field or the partial mirror field heliostat device according to the requirements, so as to realize the reflectivity of the heliostat device. The smooth rise and fall, and achieve real-time precise heat load control of different parts of the photothermal solar heat absorber, easy to control, no need to withdraw.

Description

technical field [0001] The invention relates to the field of solar thermal power generation, in particular to a heliostat device with variable light transmittance, a heliostat field including the same, a control method and a solar thermal power generation system. Background technique [0002] In the solar thermal power generation industry, heliostats play an important role in concentrating light and heat. In the actual operation of the solar thermal project, special weather conditions such as excessive sunlight or clouds in the sky often occur at noon. In the previous mirror field operation strategy, the mirror field needs to be partially or completely withdrawn to avoid the absorption of the mirror field due to (1) excessive heat, (2) too fast instantaneous heat change, or (3) huge thermal stress generated by uneven heat. damage to the heater and its accessories. In addition, there may also be problems such as improper scheduling of large-scale mirror field automation, re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24S23/70F24S23/30F24S50/20F24S50/00F24S70/30
CPCF24S23/70F24S23/30F24S50/20F24S50/00F24S70/30Y02E10/47
Inventor 王建熊施斌周慧宓霄凌刘盛豪
Owner ZHEJIANG SUPCON SOLAR TECHNOLOGY CO LTD
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