CN107062636A - Suitable for the combined light gathering device of solar thermal utilization - Google Patents
Suitable for the combined light gathering device of solar thermal utilization Download PDFInfo
- Publication number
- CN107062636A CN107062636A CN201710274088.XA CN201710274088A CN107062636A CN 107062636 A CN107062636 A CN 107062636A CN 201710274088 A CN201710274088 A CN 201710274088A CN 107062636 A CN107062636 A CN 107062636A
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- Prior art keywords
- face
- primary event
- reflection face
- combined light
- gathering device
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S23/71—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with parabolic reflective surfaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S23/82—Arrangements for concentrating solar-rays for solar heat collectors with reflectors characterised by the material or the construction of the reflector
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
- F24S2023/83—Other shapes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S2080/01—Selection of particular materials
-
- 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
- Y02E10/44—Heat exchange systems
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The invention discloses a kind of combined light gathering device suitable for solar thermal utilization, including primary event face, secondary reflection face and triple reflection face, the triple reflection bread is containing two composite parabolics, two composite parabolics are symmetrical on the plane of symmetry, the primary event face is arc-shaped, primary event face is symmetrical on the plane of symmetry, primary event face is rack-mount, focal point in primary event face is provided with secondary reflection face, secondary reflection face is rack-mount, focal point in the triple reflection face is provided with thermal-collecting tube, sunshine direct solar radiation is incident on primary event face, reflex on secondary reflection face, the triple reflection face of being reflected into, at multiple reflections back reflection to thermal-collecting tube.A kind of combined light gathering device suitable for solar thermal utilization of the present invention, by being blocked to traditional compound parabolic formula caustic surface, so that under the reduction of focusing ratio by a small margin, incident angle is greatly improved, while focusing ratio and wind loading rating in order to improve concentrator.
Description
Technical field
The present invention relates to the combined light gathering device suitable for solar thermal utilization, belong to the field of solar energy equipment.
Background technology
Solar energy is free of contamination as a kind of inexhaustible, cleaning to be always domestic and foreign scholars in the raw energy
The focus of research.Solar thermal utilization, not only possesses huge consumption market, and be also the tradition such as effective reduction coal, oil
The effective way for the environmental pollution that the consumption of fossil energy, reduction fossil energy are brought.Solar concentrator is will to be incident upon instead
The direct solar radiation penetrated on face can pass through multiple reflections, and the low energy densities sunshine in large area is reflexed into thermal-arrest tube outer surface
On, solar energy density is improved, is the critical component of solar thermal utilization so as to improve hot spot temperature.Solar energy gathers
Light device has derived the concentrator that multiple technologies develop skillful different structure, high magnification numbe concentrator by development for many years
It is main typical by slot type, tower, dish-style and linear Fresnel formula etc..Wherein slot-type optical collector is to develop the most ripe, application
Most commonly used concentrator.Traditional slot-type optical collector, due to the limitation of its incidence angle, makes its focusing ratio not lifted, causes
Collector area can not expand, so that it is complicated, cost of investment high to cause manufacturing process, while slot-type optical collector is put
Put in outdoor, due to its curved-surface structure, its wind loading rating is weaker.
For the purpose for realizing the process simplification of heat collector, increasing its wind loading rating, improving concentrator eyeglass utilization rate,
It would generally be sequentially connected and combined with the inclination of different angles, such as patent by the parabola of complex manufacturing technology by Different Plane
(CN101546033A) it is described.It is continuous successively with combined light gathering device formed by the inclination of different angles with level crossing, it can make
The manufacture craft for obtaining heat collector is simplified, but its spotlight effect is not so good as traditional parabolic shape concentrator on the contrary, has part
Reflection light fails, while concentrator entirety wind loading rating is not lifted.Also one kind is to utilize plane bar shaped speculum, is used
N blocks level crossing continuous bending or combines to form trench light condensing system at an angle, as described in patent (CN102636869A).
The simple combined light gathering device arranged with stripe-shape plane mirror according to parabolic path, although due to the row of stripe-shape plane mirror
There is certain gap between row, unit eyeglass.So that its wind loading rating is greatly increased, but its incidence angle and focusing ratio are relative to tradition
Parabolic shape concentrator all do not expand and lifted, the light losing of part can be brought on the contrary.In addition, patent
(CN103513410A) a kind of secondary condenser of design, using convex lens as its concentrator, with reference to secondary general poly-
Light device.Focusing ratio can be greatly promoted really by so doing, but it requires higher to manufacture craft, unfavorable to use industrialization promotion.
To solve above-mentioned problem and difficult point, this patent proposes one kind and utilizes multi-level solar energy reflection, and the sun is improved step by step
Can incidence angle and collection area utilization rate new approaches, innovative proposition is a kind of with specific position relation and geometry
Tertiary reflex eyeglass, the combined light gathering device that this tertiary reflex eyeglass is constituted can realize the high-effective concentration of solar energy, increase
Light-collecting lens utilization rate is greatly improved while incidence angle.
The content of the invention
Goal of the invention：In order to overcome the deficiencies in the prior art, the present invention provides a kind of suitable for solar heat profit
Combined light gathering device, by carrying out certain blocking than row to traditional compound parabolic formula caustic surface so that small in focusing ratio
Under the reduction of amplitude, incident angle is greatly improved, while focusing ratio and wind loading rating in order to improve concentrator.
Technical scheme：To achieve the above object, the combined light gathering device suitable for solar thermal utilization of the invention, including one
Secondary reflector, secondary reflection face and triple reflection face, the triple reflection bread is containing two composite parabolics, two compound parabolics
Face is symmetrical on the plane of symmetry, and the primary event face is arc-shaped, and primary event face is symmetrical on the plane of symmetry, primary event face peace
On support, the focal point in primary event face is provided with secondary reflection face, and the incidence angle in triple reflection face determines secondary
The angle of inclination of reflecting surface, secondary reflection face is rack-mount, and the focal point in the triple reflection face is provided with thermal-collecting tube,
Sunshine direct solar radiation is incident on primary event face, is reflexed on secondary reflection face, is reflected into triple reflection face, through multiple
Back reflection is reflected at thermal-collecting tube.
Preferably, the primary event face is made up of multiple stripe-shape plane minute surfaces, multiple stripe-shape plane minute surfaces are according to rail
Mark arrangement form arc-shaped.
Preferably, being provided with gap between the stripe-shape plane minute surface.
Preferably, the A/F of the triple reflection face lowermost end is less than the diameter of thermal-collecting tube.
Preferably, the material of the reflecting surface in the primary event face, secondary reflection face and triple reflection face is coating glass
Glass or safety glass silver mirror.
In the present invention, it is adaptable to the three-level eyeglass institute with specific position relation and geometry of solar thermal utilization
The combined light gathering device of composition, by carrying out necessarily blocking than row to traditional compound parabolic formula caustic surface, only retains with big
On the premise of the curvature portion of part focusing ratio, using the specific position relation of multistage eyeglass come level level increase maximum incident angle,
Increase collection area using the particular geometries of tertiary reflex eyeglass simultaneously, improve eyeglass utilization rate.It is this have it is special
Condition of the combined light gathering device and tradition parabolic type concentrator of position relationship and geometry in identical focusing ratio and aperture area
Lower contrast, substantially increases concentrator eyeglass utilization rate while increasing incidence angle.
Beneficial effect：The combined light gathering device suitable for solar thermal utilization of the present invention, not only possesses and is thrown than conventional composite
The big incidence angle of object plane formula, while possessing larger collection area, improves focusing ratio, so that hot spot temperature increases, carries
The high optical absorption efficiency of whole heat collector, simultaneously because stripe-shape plane speculum is array arrangement, has between unit eyeglass
Certain gap, the wind resistance of whole concentrator is greatly improved so that novel concentrator device also can be transported normally in the case where disliking slightly weather
OK.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 reflects schematic diagram for the combined light gathering device light of the present invention.
Fig. 3 is composite paraboloid structure schematic diagram.
Fig. 4 is stripe-shape plane mirror light line reflection schematic diagram.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
As shown in figure 1, the combined light gathering device suitable for solar thermal utilization of the present invention, including it is primary event face 1, secondary
Reflecting surface 2 and triple reflection face 3, the triple reflection face 3 include two composite parabolics, and two composite parabolics are on symmetrical
Face is symmetrical, and the primary event face 1 is arc-shaped, and primary event face 1 is symmetrical on the plane of symmetry, and primary event face 1 is arranged on branch
On frame 5, the focal point in primary event face 1 is provided with secondary reflection face 2, and secondary reflection face 2 is arranged on support 5, described
The focal point in triple reflection face 3 is provided with thermal-collecting tube 4, and sunshine direct solar radiation is incident on primary event face 1, is reflexed to secondary
On reflecting surface 2, triple reflection face 3 is reflected into, at multiple reflections back reflection to thermal-collecting tube 4.
In the present invention, the primary event face 1 is made up of multiple stripe-shape plane minute surfaces, multiple stripe-shape plane minute surfaces according to
Gap is provided between trajectory alignment formation arc-shaped, the stripe-shape plane minute surface.The opening of the lowermost end of triple reflection face 3
Less than the diameter of thermal-collecting tube 4.The material of the reflecting surface in the primary event face 1, secondary reflection face 2 and triple reflection face 3 is plating
Layer glass or safety glass silver mirror.Thermal-collecting tube 4 is located on the inside of the opening direction of triple reflection face 3, primary event face 1, secondary counter
Penetrate face 2 and triple reflection face 3 and the sun is tracked together with support 5 and is done and think north and south, thing pursuit movement.Secondary reflection face 2 is tool
There is the plane of certain fixed angle, support 5 is circle, the inward flange in primary event face 1 and the outward flange phase in triple reflection face 3
Connect, secondary reflection face 2 and primary event face 1 be fixed on support 5 with triple reflection face 3 together follow the sun do one-dimensional north and south or
Thing pursuit movement.Wherein secondary reflection face 2 is centrally located at the focal point in primary event face 1, and with certain inclination angle, wherein
The aperture area of primary event face 1 is more than the projected area of secondary reflection face 2, and the inclination angle in secondary reflection face 2 and width are by one
The incidence angle and the incidence angle of triple reflection face 3 of secondary reflector 1 are determined.The inward flange in primary event face 1 and secondary reflection face 2
Outward flange is connected, and towards sky.The direct solar radiation received on primary event face 1 can be reflected into three by secondary reflection face 2
In secondary reflector 3, at multiple reflections back reflection to thermal-collecting tube 4, the direct solar radiation injected in the incidence angle of triple reflection face 3 passes through
Multiple reflections are on the outer surface of thermal-collecting tube 4.Thermal-collecting tube 4 absorbs the direct solar radiation energy for directly covering on its upper surface simultaneously, without anti-
Penetrate.
The present invention can be related to following correlation computations process when making：As shown in Fig. 2 wherein BCDE is the throwing after blocking
Thing type caustic surface, dotted portion is truncation part.This part curved surface retains most light gathering efficiency, while incidence angle increases.
Stripe-shape plane speculum on curve AB and CD by being arranged along circular arc.Plane bar shaped light focuses on plane through level crossing reflection
JingHIChu, then compound parabolic caustic surface is reflexed to by level crossing, the final thermal-collecting tube 4 for injecting focal point.
In proportion (0:0.8) composite parabolic that blocks as shown in Fig. 2 AC and BD are parabolical each half, θ be its most
Big condensing angle.Parabola polar equation is：Directly equation in coordinates is：Wherein f=a (1+sin (θ),
at=asin (θ), L=(a+at) cot (θ), C=1/sin θi。
The top minute surface of composite parabolic is almost parallel with symmetry axis, and by its top truncated part, it is possible to reduce minute surface
Focusing ratio changes unobvious, the focusing ratio after blocking to height simultaneously：
As shown in Figure 3, its array paths circular arc calculating formula is stripe-shape plane mirror structure：
xi 2+(yi-R)2=R2(1)；
In formula, (xi, yi) be circular distribution each unit mirror center position coordinates；λiFor the corresponding central angle (°) of minute surface, i is mirror
Member numbering (i=i~n)；R is the radius of circular arc, mm；W is the A/F of circular arc, mm；T is that (t is much for unit minute surface width
Less than w), mm；α is the inclination angle in secondary reflection face 2；β is the mirror tilt angle of i plane bar shaped speculum.It is required that from optically focused
Light after the farthest level crossing GF reflections of device normal just falls the incidence of the light behind curved surface caustic surface edge and its reflection
Angle is θ.The A/F w and number n in primary event face 1, and unit minute surface width t is, it is known that the formula that iterates (1)
~(4) then can be with the particular location of determining unit minute surface.According to outermost plane bar shaped speculum according to formula：The angle of inclination in secondary reflection face 2, the width in secondary reflection face 2 and the width of unit eyeglass can then be obtained
Identical, its projection width is tcos α (due to cos α<1, with n increase, it blocks projection width far smaller than W, can be neglected
Disregard), according to formula：β=90 °-λi, then the angle of inclination of unit eyeglass can be obtained.
The maximum incident angle of i-th module unit plane bar shaped eyeglass is：θt+α/2+βi/2；
The calculation formula of the set focusing ratio of combined light gathering device is：
Eyeglass utilization rate=aperture area/collection area.
Composite parabolic is when truncating 50%, and focusing ratio reduces 5%, and incidence angle adds 60%.Using incidence angle
The composite parabolic for being 11.5 for 30 °, focusing ratio, when truncation rate is 0.5, incidence angle is increased to 48 °, and focusing ratio is reduced to 10,
Now L=649.5mm, a=287.5mm, at=250mm, d/2=25mm.
Embodiment：A/F 2000mm conventional composite parabola, a diameter of 50mm of endothermic tube, focusing ratio is 20, is entered
Firing angle is 30 °, is highly 2599mm, and the compound parabolic area of its unit length is 5.76m2, its area utilization is 35.3%.
Equal A/F, the NEW TYPE OF COMPOSITE concentrator of focusing ratio, its maximum incident angle is 55 °, is highly 1.04m, its unit length
Compound parabolic area be 2.69m2, area utilization is up to 74.3%.Under conditions of identical aperture area and focusing ratio,
NEW TYPE OF COMPOSITE concentrator increases 83% relative to traditional its incidence angle of parabolic shape concentrator, and area utilization improves 39
Percentage point.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (5)
1. a kind of combined light gathering device suitable for solar thermal utilization, it is characterised in that：Including primary event face, secondary reflection face
With triple reflection face, the triple reflection bread is containing two composite parabolics, and two composite parabolics are symmetrical on the plane of symmetry, institute
The primary event face of stating is arc-shaped, and, primary event face is rack-mount, Jiao in primary event face on the plane of symmetry symmetrically
Secondary reflection face is installed at point, secondary reflection face is rack-mount, and the focal point in the triple reflection face is provided with collection
Heat pipe, sunshine direct solar radiation is incident on primary event face, is reflexed on secondary reflection face, is reflected into triple reflection face,
At multiple reflections back reflection to thermal-collecting tube.
2. the combined light gathering device according to claim 1 suitable for solar thermal utilization, it is characterised in that：It is described once anti-
Penetrate face to be made up of multiple stripe-shape plane minute surfaces, multiple stripe-shape plane minute surfaces are according to trajectory alignment formation arc-shaped.
3. the combined light gathering device according to claim 2 suitable for solar thermal utilization, it is characterised in that：The strip flat
Gap is provided between the minute surface of face.
4. the combined light gathering device according to claim 1 suitable for solar thermal utilization, it is characterised in that：Described three times anti-
The A/F for penetrating face lowermost end is less than the diameter of thermal-collecting tube.
5. the combined light gathering device according to claim 1 suitable for solar thermal utilization, it is characterised in that：It is described once anti-
The material for penetrating the reflecting surface in face, secondary reflection face and triple reflection face is coating glass or safety glass silver mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710274088.XA CN107062636B (en) | 2017-04-25 | 2017-04-25 | Composite condenser suitable for solar heat utilization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710274088.XA CN107062636B (en) | 2017-04-25 | 2017-04-25 | Composite condenser suitable for solar heat utilization |
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| Publication Number | Publication Date |
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| CN107062636A true CN107062636A (en) | 2017-08-18 |
| CN107062636B CN107062636B (en) | 2019-12-10 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11108464A (en) * | 1997-10-02 | 1999-04-23 | Enesaabu Kk | Total collecting device for natural energy |
| CN201637922U (en) * | 2010-03-25 | 2010-11-17 | 黄建文 | Paraboloidal mirror concentrating system with optical guide |
| CN201780977U (en) * | 2010-09-19 | 2011-03-30 | 华中科技大学 | Solar battery based on secondary reflective condensation |
| CN102155365A (en) * | 2011-05-17 | 2011-08-17 | 浙江大学 | Hot-sand-heat-accumulating solar disc type Stirling engine generating set and method thereof |
| CN102636869A (en) * | 2012-04-25 | 2012-08-15 | 冯益安 | Composite plane groove type condenser with high light condensation times and uniform condensation uniformity |
| CN103134204A (en) * | 2011-11-24 | 2013-06-05 | 陕西科林能源发展股份有限公司 | Optical system for solar thermal power generation |
| CN104849844A (en) * | 2015-03-19 | 2015-08-19 | 浙江大学 | Dish type Fresnel reflection concentration method and apparatus thereof |
| CN205227842U (en) * | 2015-12-02 | 2016-05-11 | 天津滨海光热反射技术有限公司 | Slot type solar mirror spotlight ware |
-
2017
- 2017-04-25 CN CN201710274088.XA patent/CN107062636B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11108464A (en) * | 1997-10-02 | 1999-04-23 | Enesaabu Kk | Total collecting device for natural energy |
| CN201637922U (en) * | 2010-03-25 | 2010-11-17 | 黄建文 | Paraboloidal mirror concentrating system with optical guide |
| CN201780977U (en) * | 2010-09-19 | 2011-03-30 | 华中科技大学 | Solar battery based on secondary reflective condensation |
| CN102155365A (en) * | 2011-05-17 | 2011-08-17 | 浙江大学 | Hot-sand-heat-accumulating solar disc type Stirling engine generating set and method thereof |
| CN103134204A (en) * | 2011-11-24 | 2013-06-05 | 陕西科林能源发展股份有限公司 | Optical system for solar thermal power generation |
| CN102636869A (en) * | 2012-04-25 | 2012-08-15 | 冯益安 | Composite plane groove type condenser with high light condensation times and uniform condensation uniformity |
| CN104849844A (en) * | 2015-03-19 | 2015-08-19 | 浙江大学 | Dish type Fresnel reflection concentration method and apparatus thereof |
| CN205227842U (en) * | 2015-12-02 | 2016-05-11 | 天津滨海光热反射技术有限公司 | Slot type solar mirror spotlight ware |
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|---|---|
| CN107062636B (en) | 2019-12-10 |
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