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Variable-transmittance heliostat device and control method

A technology of light-transmitting devices and control methods, which is applied to solar collector controllers, solar ray concentration, lighting and heating equipment, etc., and can solve the problem of reduced photothermal efficiency, improper scheduling, uneven temperature on the surface of the heat sink, etc. problems, to achieve the effect of easy adjustment, cost saving and control, and easy control

Active Publication Date: 2021-03-26
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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  • Variable-transmittance heliostat device and control method
  • Variable-transmittance heliostat device and control method
  • Variable-transmittance heliostat device and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] This embodiment provides a heliostat device with variable light 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 light transmittance and a reflector 120 for reflecting incident light, the variable light transmission device 110 is set At a predetermined position close to the front of the heliostat main body 100, the reflector 120 is arranged at a predetermined position close to the back of the heliostat main body 100, wherein, by controlling the variable light transmission device 110 to change the transmittance of incident light, Thereby, 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 that the heliosta...

Embodiment 2

[0073] This embodiment provides a heliostat device with variable light transmittance, see image 3 , the heliostat device of this embodiment is similar to Embodiment 1, 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 polarized lenses that have the functions of shielding and transmitting incident light, and also includes a driving mechanism for driving the polarized lenses to rotate to change the relative position between the lenses 170; when the drive 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 can change the transmission of the light transmission device 110 The luminosity changes, thereby achieving the effect of controlling the...

Embodiment 3

[0083] This embodiment provides a heliostat field, including several heliostat devices with variable light transmittance described in Embodiment 1 or Embodiment 2, wherein, the power supply form of each heliostat device can adopt unified power supply, distributed According to the load requirements of heat sinks in different situations, the voltage of each heliostat device or the voltage of heliostats in a certain zone can be controlled independently in real time.

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Abstract

The invention discloses a variable-transmittance heliostat device. The variable-transmittance heliostat device comprises a heliostat body, wherein the heliostat body comprises a variable-transmittancedevice used for changing transmittance and a reflecting part used for reflecting incident light, and the variable-transmittance device is arranged at the preset position close to the front surface, of the heliostat body; and the reflecting part is arranged at the preset position close to the back surface, of the heliostat body, and the effect of controlling the reflectivity of the heliostat device is achieved by controlling the light transmittance of a variable- transmittance device. The invention further discloses a method for controlling the reflectivity of the heliostat device. According to the heliostat device, the light transmittance of the variable-transmittance device of the heliostat device can be changed steplessly, quickly and accurately for a full-heliostat field or a heliostatfield local heliostat device as needed, so that the reflectivity of the heliostat device is increased and decreased smoothly, real-time and accurate thermal load control over different parts of a photo-thermal solar heat absorber is achieved, control is convenient, and withdrawing of the field is not needed.

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 solar thermal projects, special weather conditions such as too much sunlight at noon or cloudy sky often occur. In the previous operation strategy of the mirror field, the mirror field needs to be partially or completely withdrawn to avoid the huge thermal stress caused by (1) excessive heat, (2) rapid instantaneous heat change, or (3) uneven heat. Damage to the heater and its ancillary equipment. In addition, there may be problems such as improper scheduling of large-scale mirror field automation, which may lead to uneven temperature on the sur...

Claims

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Application Information

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Patent Type & Authority Applications(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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