CN104697196B - Heat dump energy-flux density adjusting method in tower type solar heat collector - Google Patents
Heat dump energy-flux density adjusting method in tower type solar heat collector Download PDFInfo
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- CN104697196B CN104697196B CN201310663871.7A CN201310663871A CN104697196B CN 104697196 B CN104697196 B CN 104697196B CN 201310663871 A CN201310663871 A CN 201310663871A CN 104697196 B CN104697196 B CN 104697196B
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- heliostat
- target location
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- flux density
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The present invention relates to the heat dump energy-flux density adjusting method in a kind of tower type solar heat collector, including：To a certain heliostat in solar energy heat collector, according to the focusing of heliostat ratio, the target area of the heliostat is determined；In the target area of a certain heliostat, target location is determined for the heliostat；At regular intervals, the step of re-executing determination target location, order is terminated until receiving accordingly.The method according to the invention, the target point of all heliostats is randomly generated, and is being changed over time, and when heliostat quantity is more, Energy distribution is relatively uniform, and does not need human intervention；When there is part heliostat failure to participate in optically focused in heliostat field, the energy flow distribution of hot spot is not influenceed, energy flow distribution is unrelated with the location of the quantity of heliostat and these heliostats.
Description
Technical field
The present invention relates to the hot power field of Salar light-gathering, the heat absorption in more particularly to a kind of tower type solar heat collector
Device energy-flux density adjusting method.
Background technology
Tower type solar heat collector at least includes：The heliostat field that is made up of multiaspect heliostat and it is installed on high tower
Heat dump.Its operation principle is：Sunshine is concentrated by heliostat and reflexes to heat dump, high temperature is produced, then utilizes height
Temperature realizes the heating to working media.Working media can have a variety of subsequent applications after being heated, such as generating, oil exploitation, coal
Chemical industry, desalinization etc..
Tower type solar heat collector in the course of the work, because the tracking accuracy of every face heliostat is different, heliostat
It is different the location of in mirror, thus heliostat field formed on heat dump hot spot energy-flux density it is typically uneven
's.Hot spot energy-flux density is uneven to be allowed within the specific limits, but if energy-flux density is seriously uneven, it is easy to cause
Heat dump is damaged.It would therefore be desirable to have the method for adjustment hot spot energy-flux density.
The conventional process of adjustment hot spot energy-flux density of the prior art is as follows：Heliostat is divided into multiple groups, different groups
The hot spot that heliostat reflected sunlight is formed gets to the different zones of heat dump, when detect some regional temperature it is too high when,
Just one or more surfaces heliostat that hot spot target location is the too high region of temperature is withdrawn or their target location is revised as
Low-temperature region, so as to realize the adjustment to hot spot energy-flux density.
Because there is certain tracking error in heliostat（Generally there is the tracking error of 3 milliradians or so）, it is not all
The sunshine that heliostat is reflected can get to the region specified exactly, thus heat dump energy-flux density it is often the case that
Uneven, target location is that the heliostat of high-temperature area can might not exactly get to high-temperature area, while heat dump is logical
Larger thermal capacitance is commonly present, therefore, above-mentioned hot spot energy-flux density adjusting method of the prior art is extremely difficult to expected effect.
The content of the invention
It is an object of the invention to overcome hot spot energy-flux density adjusting method of the prior art to be difficult to produce a desired effect
Defect so that there is provided a kind of method that can effectively adjust heat dump energy-flux density.
To achieve these goals, the invention provides the heat dump energy-flux density in a kind of tower type solar heat collector
Adjusting method, including：
Step 1）, to a certain heliostat in the solar energy heat collector, according to the focusing of heliostat ratio, it is determined that should
The target area of heliostat；Wherein, the target area refers to when the target location of heliostat is set to the edge in the region,
The hot spot that heliostat reflected sunlight is formed will not overflow heat dump；
Step 2）, in step 1）In the target area of resulting a certain heliostat, target location is determined for the heliostat；
Step 3）, at regular intervals, re-execute step 2）, order is terminated accordingly until receiving.
In above-mentioned technical proposal, in step 2）In, it is that the target location that heliostat is determined is one random in target area
Position.
In above-mentioned technical proposal, the computational methods of the target location are as follows：
Assuming that the position of heat dump is used（A, B, C）Represent, wherein A represents thing coordinate, B represents north and south coordinate, and C represents high
Spend coordinate；Use the target area of the heliostat（D, E）, the target location region for representing the heliostat be with（A, B, C）For in
The rectangular area of the heart, a width of D meters, a height of E meters, then the target location of the heliostat is：
A+（RAND（）-0.5）* D, B+（RAND（）-0.5）* E, C
Wherein, RAND（）It is the random number between 0 to 1.
The advantage of the invention is that：
1st, the method according to the invention, the target point of all heliostats is randomly generated, and is being changed over time, the settled date
When mirror quantity is more, Energy distribution is relatively uniform, and does not need human intervention.
2nd, when there is part heliostat failure to participate in optically focused in heliostat field, the energy flow point of hot spot is not influenceed
Cloth, energy flow distribution is unrelated with the location of the quantity of heliostat and these heliostats.
Brief description of the drawings
Fig. 1 is the flow chart of the inventive method；
Fig. 2 is the schematic diagram of involved target area in the present invention.
Embodiment
In conjunction with accompanying drawing, the invention will be further described.
Before being elaborated to the method for the present invention, in order to make it easy to understand, first to tower type solar heat collector
Correlation properties illustrate.
The tower type solar heat collector of the present invention includes heliostat field and the heat dump on high tower.The settled date
Jing Chang is made up of hundreds and thousands of face heliostats, due to sun angle of scattering, and heliostat field is front-seat（With apart from the remote of heat dump
Early work is the foundation for distinguishing heliostat field front and rear row）The hot spot that is formed on heat dump of heliostat formed than heel row heliostat
Hot spot it is small, for example, heliostat from a distance from heat dump often away from 100 meters, the hot spot formed due to the sun dissipate angle presence
Spot diameter can be made to expand 0.93 meter.One 10MW heliostat field, last solar eyepiece that is ranked is to the distance of first row heliostat
Often due to the sun dissipates angle, the spot diameter of heel row heliostat can be caused than front-seat heliostat more than 600 meters
Spot diameter is big 5.5 meters, therefore, and front-seat heliostat is the main cause for causing hot spot energy-flux density uneven.
Based on above-mentioned characteristic, for the front-seat heliostat in heliostat field, it can be realized to heat dump using the inventive method
The adjustment of hot spot energy-flux density.With reference to Fig. 1, the inventive method comprises the following steps：
Step 1）, to a certain heliostat in the solar energy heat collector, according to the focusing of heliostat ratio, it is determined that should
The target area of heliostat so that when the target location of the heliostat is set to the edge in the region, heliostat reflected sunlight
The hot spot formed will not overflow heat dump.
Target area is described in fig. 2.Target location of a certain heliostat on heat dump surface 21 is located at area
The edge in domain 22, and the hot spot 23 that the heliostat is formed does not overflow heat dump surface 21, then the region 22 is exactly described
Target area.
Step 2）, in step 1）In the target area of resulting a certain heliostat, target location is determined for the heliostat.
Assuming that the position of heat dump is used（A, B, C）Represent, wherein A represents thing coordinate, B represents north and south coordinate, and C represents high
Spend coordinate；Use the target area of certain heliostat（D, E）, the target location region for representing the heliostat be with（A, B, C）Centered on
Rectangular area, a width of D meters, a height of E meters, then the target location of the heliostat is expressed as follows：
A+（RAND（）-0.5）* D, B+（RAND（）-0.5）* E, C
Wherein, RAND（）It is the random number between 0 to 1, can be automatically generated by computer.
Step 3）, at regular intervals, re-execute step 2）, order is terminated accordingly until receiving.
From to step 2）Description as can be seen that it is determined that heliostat target location when, the target location is fixed
Obtained at random in the target area of solar eyepiece, therefore the heliostat target location determined every time is random, this causes heliostat
Energy-flux density redistribution so that the energy-flux density of whole heliostat field hot spot becomes uniform.
The inventive method can be used for including the heel row settled date in addition to it can be used for the front-seat heliostat in heliostat field
The whole heliostat field of mirror.
It should be noted last that, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted.Although ginseng
The present invention is described in detail according to embodiment, it will be understood by those within the art that, to the technical side of the present invention
Case is modified or equivalent substitution, and without departure from the spirit and scope of technical solution of the present invention, it all should cover in the present invention
Right among.
Claims (1)
1. the heat dump energy-flux density adjusting method in a kind of tower type solar heat collector, including：
Step 1), to a certain heliostat in the solar energy heat collector, according to the focusing of heliostat ratio, determine the settled date
The target area of mirror；Wherein, the target area refers to when the target location of heliostat is set to the edge in the region, the settled date
The hot spot that mirror reflected sunlight is formed will not overflow heat dump；
Step 2), in step 1) obtained by a certain heliostat target area in, determine target location for the heliostat, the mesh
Mark is set to the random site in target area；The computational methods of the target location are as follows：
Assuming that the position of heat dump is represented with (A, B, C), wherein A represents thing coordinate, and B represents north and south coordinate, and C represents that height is sat
Mark；(D, E) is used in the target area of the heliostat, and the target location region for representing the heliostat is centered on (A, B, C)
Rectangular area, a width of D meters, a height of E meters, then the target location of the heliostat is：
A+ (RAND () -0.5) * D, B+ (RAND () -0.5) * E, C
Wherein, RAND () is the random number between 0 to 1；
Step 3), at regular intervals, re-execute step 2), until receiving and terminating order accordingly.
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| CN201310663871.7A CN104697196B (en) | 2013-12-08 | 2013-12-08 | Heat dump energy-flux density adjusting method in tower type solar heat collector |
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| CN201310663871.7A CN104697196B (en) | 2013-12-08 | 2013-12-08 | Heat dump energy-flux density adjusting method in tower type solar heat collector |
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| CN104697196B true CN104697196B (en) | 2017-09-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105160435B (en) * | 2015-09-17 | 2019-01-11 | 浙江大学 | Tower type solar thermo-power station mirror field focusing strategy optimization method |
| CN110059703B (en) * | 2019-04-04 | 2021-01-12 | 浙江中控太阳能技术有限公司 | Automatic energy flow density adjusting device and method for heat absorber |
| CN111459194B (en) * | 2020-04-10 | 2023-09-12 | 中国电力工程顾问集团西北电力设计院有限公司 | Solar thermal power generation aiming point determining method based on heliostat actually measured light spots |
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