CN108507200A - A kind of high-gain solar energy composite plane concentrator - Google Patents
A kind of high-gain solar energy composite plane concentrator Download PDFInfo
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- CN108507200A CN108507200A CN201810414568.6A CN201810414568A CN108507200A CN 108507200 A CN108507200 A CN 108507200A CN 201810414568 A CN201810414568 A CN 201810414568A CN 108507200 A CN108507200 A CN 108507200A
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- 239000002131 composite material Substances 0.000 title claims abstract description 17
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 239000006096 absorbing agent Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 230000003068 static effect Effects 0.000 abstract 1
- 241001424688 Enceliopsis Species 0.000 description 5
- 239000011165 3D composite Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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Classifications
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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
Abstract
The invention discloses a kind of high-gain solar energy composite plane concentrators, including reflecting part, round heat collection body and pedestal, the involute part of reflecting part and parabola branch, which change to be sequentially connected by two pieces or more of plane reflector, to be formed, the plane reflector escape half-angle having the same for forming involute part, forms the plane reflector reception half-angle having the same of parabola branch.The concentrator has larger lighting angle and smaller collection area using the static accepting method for exempting from optrack, can reach it and receives the high-gain effect of half-angle raising synchronous with focusing ratio；Reflective surface is designed as slab construction, solves the problems, such as that the reflective cylinder difficulty of processing of CPC parabolics is big and manufacturing process complexity, cost is also reduced while saving material；It is suitable for the vacuum solar heat-collecting pipe using cylinder as absorber, low temperature heat energy in output can easily be made up of low-temperature solar energy thermal-arrest array in large size series-parallel pattern.
Description
Technical field
The present invention relates to a kind of solar concentrator, more particularly to a kind of high-gain solar energy composite plane concentrator belongs to
In solar energy heating utilization technical field.
Background technology
Solar thermal utilization is most common mode in daily life.Although the gross energy of solar radiation is very big, the sun
Energy flux density is very low, to generate high warm using solar energy, generally requires to sunlight into line convergence.Technical comparing at present
Ripe has trench light condensing system, disc type condensation system and tower condenser system, Fresnel condenser system, these concentrator knots
Structure is complicated, must be continuously tracked that sunlight, installation and removal are highly inconvenient, system cost is higher, it is difficult to by common industry
Enterprise is received.However, having arrived in the 1970s, compound parabolic concentrator（CPC）Initially enter the optically focused neck of solar energy
Domain is widely used.
The geometric concentrating ratio of CPCC g =1/sinθ, whereinθ（θ＞ 0）For the reception half-angle of CPC.Thus formula can be seen that, increase
Although optically focused working time of CPC can be extended by receiving half-angle, result in the reduction of CPC focusing ratios, it is difficult to obtain energy-flux density compared with
High solar radiant energy；Otherwise reduce reception half-angle and although increase CPC focusing ratios, but the optically focused working time of CPC can be shortened,
Cause CPC that cannot effectively work for a long time.Therefore tradition CPC cannot be while increasing reception half-angle, and improves focusing ratio.
In addition, the parabolic reflecting pole face of processing CPC has certain difficulty, manufacturing process is complicated and precision is low；Even if CPC
Without continuous optrack, it is also desirable to intermittent or seasonal to go to the inclination angle on adjustment concentrator and ground more to obtain
Solar energy, and inclination angle reduces system stability, also increases consumption in this way as the latitude for putting geographical location changes and changes
Material amount, and then increase cost.
Invention content
The present invention is directed to overcome the shortcomings of the prior art, a kind of high-gain solar energy composite plane concentrator is provided,
It can receive large-scale solar energy without optrack, be suitable for the vacuous solar energy thermal-arrest using cylinder as absorber
Pipe, low temperature heat energy in output can also be made up of low-temperature solar energy thermal-arrest array in large size series-parallel mode.
The technical solution adopted by the present invention is：
A kind of high-gain solar energy composite plane concentrator, including reflecting part, round heat collection body 3 and pedestal 7；
Reflecting part includes left and right two parts, and two parts include respectively an involute part 5 and a parabola branch 1, are gradually opened
Line part 5 is connect with parabola branch 1 by tie point 4；The two-part involute part 5 in left and right is connected by common endpoint 6
It connects；Left and right two parts are with the normal direction of aperture for symmetrical axial symmetry；
Reflecting part improves to obtain according to existing CPC structures, on the basis of existing CPC structures, by involute part 5 and throws
Object line part 1 is changed to be sequentially connected by two pieces or more of plane reflector and form；Form the plane reflector of involute part 5
Escape half-angle having the same, and the tie point between plane reflector is respectively positioned on the involute of CPC contour lines 2；Form parabolic
The plane reflector reception half-angle having the same of line part 1, and the tie point between plane reflector is respectively positioned on CPC contour lines 2
Parabola on；
Reflecting part is mounted on pedestal 7, and round heat collection body 3 is mounted in the normal direction of aperture, with involute part
There are certain gaps between endpoint 6（Gap is advisable with 5-8mm）Although there is small part light to flee from circle across this gap
Heat collection body 3, but the stress that can be contacted and generate with reflecting part to avoid round heat collection body 3 causes plane reflector to deform upon
And influence optical efficiency；
Aperture width is more than the aperture width of the existing CPC of the round heat collection body with same radius；
When installation, the high-gain solar energy composite plane concentrator aperture is towards Due South, the normal direction of aperture
Inclination angle is formed with level groundβ,βIt is 35 ° -55 °,βConcrete numerical value can according to use ground latitude and year lighting quantity be adjusted
It is whole to receive the optimal angle of solar radiant energy to reach, it can also be so that the solar thermal collector mounted angle of land used be poly- as this
The inclination angle of light deviceβ。
Preferably, plane reflector can be used mirror face stainless steel material or post the glass-mirror manufacture of high reflectance.
Preferably, pedestal 7 should have the function of reliable stability and facilitate adjustment inclination angle, be such as equipped in base bottom
Adjustable knob.
The course of work：When installation, the aperture of the high-gain solar energy composite plane concentrator is put towards due south direction
It sets, adjusts its lighting surface normal direction and form inclination angle with level groundβ.The light of aperture is entered, a part directly reaches
Round heat collection body 3, a part reach round heat collection body 3 after reflecting part reflects（As shown in Figure 4）, least partially penetrate gap and
Flee from round heat collection body 3；Although sun altitudeαConstantly changing, but since concentrator reception angle of incidence of light range is wide,
The most solar radiant energies for entering aperture can be made direct or be reflected to round heat collection body 3 and be absorbed and used,
And the light for being directly incident on involute part can reach round heat collection body 3 after reflection, as shown in Figure 4.
Principle：The escape half-angle principle design involute such as present invention use part（Since the lower part of CPC can be by heat collection body
And other face types block）, using etc. receive half-angle principle design parabola branch.
Deng escape half-angle principle：As shown in Fig. 2, being taken a little on involute part 5BWithAIt is reflective to constitute three-dimensional composite plane
Plate sets up an officeC、B、ARespectivelyCB、BA、ADThe upper extreme point of section, when sunray reachesCB、BA、ADWhen section surface, sunray
By respectively can be withCB、BA、ADVertical linen 1 、n 2 、n 3 As normal reflection.When sunray is irradiated toCBThe vertex of sectionCWhen, instead
The lucky tangent round heat collection bodies of light CE are penetrated in pointE, forBWithAPoint equally has reflection light respectivelyBFWithAGTangent round collection
Hot body is in pointF、G.Work as a littleBWithAThe reflective plate group of three-dimensional composite plane constituted, face shapeCB、BA、ADVertex in sectionC、B、 AMeet the reflection light corresponding to feature-incident light line reflectionCE、BF、AGWith normaln 1 、n 2 、n 3 It constitutesγ 1 、γ 2 、γ 3 Number
It is worth equal, the reflective plate group of involute-type composite plane of more dimensions can be obtained based on such design principle.It can from Fig. 2
To find out, forCPoint, if the angle that incident ray is constituted with reflection light is less thanγ 1 , then reflection light cannot reach round thermal-arrest
It body and escapes from its optical port, it is on the contrary then round heat collection body can be reached,AWithBPoint also has similar situation.
It is similar with escape principle of half-angle is waited Deng the principle for receiving half-angle, as shown in figure 3, being taken a little on parabola branch 1H、I、JConstitute three-dimensional composite plane reflector, pointH、I、JRespectivelyHI、IJUpper extreme point, sunray point of irradiation arrivesH、IPoint
Not withn 4 、n 5 As normal reflection, respectively it is tangential on a little with round heat collection bodyL、K, whereinθ 1 、θ 2 Numerical value is equal, therefore can claimHI、 IJReception half-angle having the sameθ。
Deng receiving half-angle principle with equal escape half-angle principle the difference is that：When the dimension of composite plane reflector tends to
When infinitely great, common escape half-angle numerical approximation is equal to zero, and common reception half-angle numerical approximation is equal to the reception of original CPC
Half-angle.
Deng the mode that receives half-angle and the equal design for escaping half-angle and can be used program calculation or iteration, to find out each plane anti-
The common reception half-angle of tabula rasa（θ）Or common escape half-angle（γ）And the tie point of each plane.
Compared with prior art, the present invention advantage is：
1, with larger lighting angle and smaller collection area, focusing ratio is theoretically increased（Focusing ratio can define
For the ratio of the width and round heat collection body perimeter of the effective aperture of concentrator）, and tradition CPC can only receive 2θLight in range
Line, and the concentrator can theoretically receive 4θLight in range has reached the height of focusing ratio raising synchronous with receiving angle
Gain effect；
2, large-scale solar energy can be received by being not necessarily to optrack, and the solar radiant energy that round heat collection body receives is at double
Increase, while realizing high-effective concentration, also improves system run all right, increase capture energy of the system to sunray
Power；
3, with etc. receive half-angle principle and escape half-angle principle waited to design composite plane reverse reflector structure, solve CPC throwings
The problem of reflective cylinder difficulty of processing of object is big and manufacturing process complexity, cost is also reduced while saving material.
Description of the drawings
Fig. 1 is schematic structural view of the invention；
The escape half-angle theory schematic diagrames such as Fig. 2 is；
The reception half-angle theory schematic diagrames such as Fig. 3 is；
Fig. 4 is the opticpath figure of the present invention；
In figure：1- involutes part, 2-CPC contour lines, 3- circle heat collection bodies, 4- tie points, 5- parabola branch, 6- endpoints,
7- pedestals,αSun altitude,βInclination angle,n 1 、n 2 、n 3 、n 4 、n 5 Normal,θ 1 、θ 2 Receive half-angle, γ 1、γ 2 、γ 3 Escape half
Angle.
Specific implementation mode
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment 1
As shown in Figure 1, a kind of high-gain solar energy composite plane concentrator, including reflecting part, round heat collection body 3 and pedestal 7；
Reflecting part includes left and right two parts, and two parts include respectively an involute part 5 and a parabola branch 1, are gradually opened
Line part 5 is connect with parabola branch 1 by tie point 4；The two-part involute part 5 in left and right is connected by common endpoint 6
It connects；Left and right two parts are with the normal direction of aperture for symmetrical axial symmetry；
Reflecting part improves to obtain according to existing CPC structures, on the basis of existing CPC structures, by involute part 5 and throws
Object line part 1 is changed to be sequentially connected by two pieces or more of plane reflector and form；Form the plane reflector of involute part 5
Escape half-angle having the same, and the tie point between plane reflector is respectively positioned on the involute of CPC contour lines 2；Form parabolic
The plane reflector reception half-angle having the same of line part 1, and the tie point between plane reflector is respectively positioned on CPC contour lines 2
Parabola on；
Reflecting part is mounted on pedestal 7, and round heat collection body 3 is mounted in the normal direction of aperture, with involute part
There are the gaps of 5mm between endpoint 6；
Aperture width is more than the aperture width of the existing CPC of the round heat collection body with same radius；
When installation, aperture forms inclination angle towards Due South, normal direction and the level ground of apertureβ,βIt is 35 °.
Embodiment 2
The present embodiment and 1 structure of embodiment are essentially identical, the difference is that, the endpoint 6 of round heat collection body 3 and involute part
Between have the gap of 8mm.
Embodiment 3
The present embodiment and 1 structure of embodiment are essentially identical, the difference is that, normal direction and the level ground of aperture are formed
Inclination angleβIt is 55 °.
Embodiment 4
The present embodiment and 1 structure of embodiment are essentially identical, the difference is that, plane reflector uses mirror face stainless steel material system
It makes.
Embodiment 5
The present embodiment and 1 structure of embodiment are essentially identical, the difference is that, plane reflector is using the glass for posting high reflectance
Glass minute surface manufactures.
Embodiment 6
The present embodiment and 1 structure of embodiment are essentially identical, the difference is that, 7 bottom of pedestal is equipped with height-adjustable knob,
By adjusting the inclination angle that the normal direction of aperture is formed with level ground to the adjusting of knob heightβAngle.
Claims (5)
1. a kind of high-gain solar energy composite plane concentrator, including reflecting part, round heat collection body（3）And pedestal（7）；
Reflecting part includes left and right two parts, and two parts include respectively an involute part（5）With a parabola branch（1）,
Involute part（5）With parabola branch（1）Pass through tie point（4）Connection；The two-part involute part in left and right（5）By altogether
Same endpoint（6）Connection；Left and right two parts are with the normal direction of aperture for symmetrical axial symmetry；
The involute part of reflecting part（5）And parabola branch（1）It is to be sequentially connected by two pieces or more of plane reflector
Composition；Form involute part（5）Plane reflector escape half-angle having the same, and the tie point between plane reflector is equal
Positioned at CPC contour lines（2）Involute on；Form parabola branch（1）Plane reflector reception half-angle having the same, and
Tie point between plane reflector is respectively positioned on CPC contour lines（2）Parabola on；
Reflecting part is mounted on pedestal（7）On；Round heat collection body（3）In the normal direction of aperture, with involute portion
The endpoint divided（6）Between there are gaps；Aperture width is more than the daylighting of the existing CPC of the round heat collection body with same radius
Mouth width degree；
When installation, aperture forms inclination angle towards Due South, normal direction and the level ground of apertureβ。
2. high-gain solar energy composite plane concentrator according to claim 1, which is characterized in that round heat collection body（3）
With endpoint（6）Between gap be 5-8mm.
3. high-gain solar energy composite plane concentrator according to claim 1, which is characterized in that the normal side of aperture
To the inclination angle formed with level groundβIt is 35 ° -55 °.
4. high-gain solar energy composite plane concentrator according to claim 1, which is characterized in that plane reflector uses
Mirror face stainless steel material or the glass-mirror manufacture for posting high reflectance.
5. high-gain solar energy composite plane concentrator according to claim 1, which is characterized in that pedestal（7）Bottom is set
There is adjustable inclinationβDevice.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810414568.6A CN108507200A (en) | 2018-05-03 | 2018-05-03 | A kind of high-gain solar energy composite plane concentrator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810414568.6A CN108507200A (en) | 2018-05-03 | 2018-05-03 | A kind of high-gain solar energy composite plane concentrator |
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| CN108507200A true CN108507200A (en) | 2018-09-07 |
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| CN201810414568.6A Pending CN108507200A (en) | 2018-05-03 | 2018-05-03 | A kind of high-gain solar energy composite plane concentrator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110457845A (en) * | 2019-08-16 | 2019-11-15 | 昆明理工大学 | A kind of construction method of tubular type solar energy compound parabolic concentrator face shape mathematical model |
| CN110489710A (en) * | 2019-08-16 | 2019-11-22 | 昆明理工大学 | A kind of calculation method of tubular type absorber compound parabolic concentrator reflecting surface arc length |
| CN116202237A (en) * | 2023-04-28 | 2023-06-02 | 昆明理工大学 | Solar vacuum tube photo-thermal performance monitoring device and monitoring method |
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2018
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| CN201983472U (en) * | 2011-04-14 | 2011-09-21 | 北京清华阳光能源开发有限责任公司 | Solar heat collector equipped with compound parabolic collector concentrator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110457845A (en) * | 2019-08-16 | 2019-11-15 | 昆明理工大学 | A kind of construction method of tubular type solar energy compound parabolic concentrator face shape mathematical model |
| CN110489710A (en) * | 2019-08-16 | 2019-11-22 | 昆明理工大学 | A kind of calculation method of tubular type absorber compound parabolic concentrator reflecting surface arc length |
| CN110457845B (en) * | 2019-08-16 | 2022-08-26 | 昆明理工大学 | Method for constructing circular tube type solar composite parabolic condenser surface shape mathematical model |
| CN116202237A (en) * | 2023-04-28 | 2023-06-02 | 昆明理工大学 | Solar vacuum tube photo-thermal performance monitoring device and monitoring method |
| CN116202237B (en) * | 2023-04-28 | 2023-08-11 | 昆明理工大学 | Solar vacuum tube photo-thermal performance monitoring device and monitoring method |
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