CN201828705U - Solar collector and light condensing units thereof - Google Patents
Solar collector and light condensing units thereof Download PDFInfo
- Publication number
- CN201828705U CN201828705U CN2010205780238U CN201020578023U CN201828705U CN 201828705 U CN201828705 U CN 201828705U CN 2010205780238 U CN2010205780238 U CN 2010205780238U CN 201020578023 U CN201020578023 U CN 201020578023U CN 201828705 U CN201828705 U CN 201828705U
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- China
- Prior art keywords
- receiver
- level crossings
- light condensing
- heat collector
- solar heat
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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 utility model provides a solar collector and light condensing units thereof. The solar collector comprises a receiver and a light condensing module, wherein the light condensing module is used for reflecting sunlight to the receiver, the receiver is arranged above the light condensing module by a support, and the light condensing module comprises a plurality of light condensing units; and the solar collector is characterized in that each light condensing unit comprises five plane mirrors, the five plane mirrors are arranged in parallel, the center points of the five plane mirrors are positioned on the same line, and the fiver plane mirrors are connected with a rotating device. The solar collector and the light condensing units thereof use the plane mirrors as the light condensing module, thus saving cost; and the solar collector and the light condensing units thereof can overcome the deficiency of non-uniform heating of feat transfer fluid in a heat absorbing tube of the existing receiver, thus being more beneficial to improving the heat absorbing efficiency.
Description
Technical field
The utility model relates to a kind of solar thermal collector and light focusing unit thereof, and is particularly related to a kind of solar heat collector and light focusing unit thereof.
Background technology
Solar heat collector mainly comprises a linear Fresnel reverberator (Linear FresnelReflector, LFR) system and a receiver, this linear Fresnel reflector system comprises a linear reflective device field, this linear reflective device field is made up of a plurality of reverberators that be arranged in parallel side by side, and these reverberators can drive to follow the tracks of sun's motion by a tracking means simultaneously.The sunshine of these reverberator reflections is concentrated directive to be arranged in the receiver of these reverberator tops, by this receiver sun power is converted to heat energy.A common receiver can be arranged between a plurality of reverberators, so that receive the sunshine of these a plurality of reverberator reflections.This relevant prior art can be consulted the PCT patented claim that publication number is WO2009/023063, the absorber of the solar heat collector that this patented claim disclosed is provided with a plurality of endothermic tubes parallel with the catoptron of reverberator in the centre, and reflecting element is set in the side of this absorber, so a part exposes on the endothermic tube after the sunshine of reverberator reflection can reflect through this reflecting element again, the weak point of this kind structure is to run through whole receiver because of endothermic tube, the part endothermic tube may make its inner heat-transfer fluid heating because raying is concentrated fully, thereby can absorb the heat energy of max cap., and the endothermic tube that is in the edge makes the heat-transfer fluid heating in it insufficient because of raying is less, thereby fail to make full use of the heat absorption capacity of heat-transfer fluid, thereby be unfavorable for improving heat absorption efficiency.Moreover because the raying of part endothermic tube is concentrated, temperature is higher, corresponding thermal deformation is bigger, the endothermic tube at edge then is out of shape less, and so need be considered this kind situation and do corresponding processing when system design, thereby increases the complexity of system design, when particularly if endothermic tube is longer, the situation of this kind thermal deformation inequality will be more serious, and in addition, the catoptron of solar thermal collector adopts the arc like reflection mirror mostly at present, cost is higher, is unfavorable for reducing cost.
The utility model content
The purpose of this utility model is to provide a kind of cost low and help improving the heat collector and the light focusing unit thereof of heat absorption efficiency, solves the too high problem of light focusing unit expense that exists in the prior art.
To achieve these goals, the utility model provides a kind of light focusing unit of solar heat collector, described light focusing unit is made up of five level crossings, five described level crossings arrange side by side, and the central point of five described level crossings is located along the same line, and five described level crossings all link to each other with whirligig.
To achieve these goals, the utility model also provides a kind of solar heat collector, comprise receiver and concentration module, wherein said this concentration module is in order to reflex to sunshine described receiver, and this receiver is by propping up the top that is set up in concentration module, described concentration module comprises a plurality of light focusing unit, described light focusing unit is made up of five level crossings, five described level crossings arrange side by side, and the central point of five described level crossings is located along the same line, and five described level crossings all link to each other with whirligig.
Optionally, described receiver is divided into several sections, connect by a transfer tube between every section, and every section endothermic tubes that include a series of extensions that are parallel to each other of described receiver, the two ends of described endothermic tube all are connected with the transfer tube at this section receiver two ends.
Optionally, described endothermic tube surface is coated with semiconductor absorption layer and protective oxide film successively.
Optionally, a series of common cavitys that form of described endothermic tube that are parallel to each other and extend of every section described receiver, and described cavity is provided with an opening in the face of an end of concentration module, and the sunshine that focuses on from concentration module enters cavity from opening, and repeatedly reflects in cavity and be absorbed.
Optionally, the cavity of described receiver is arch or horseshoe-shaped structure.
Optionally, every section described receiver two ends are provided with mounting flange, are provided with splitter box between the mounting flange, and this splitter box one end is connected with transfer tube, and the other end is connected with all endothermic tube ports.
Owing to adopted technique scheme, compared with prior art, the utlity model has following advantage: the utility model solar heat collector and light focusing unit thereof can overcome in the existing receiver endothermic tube heat-transfer fluid uneven defective of being heated, thereby be more conducive to improve heat absorption efficiency, also can overcome the defective of endothermic tube temperature distortion inequality simultaneously; Utilize a plurality of level crossings to form circular-arc caustic surface, reach the colleague of spotlight effect, reduced cost.
Description of drawings
Fig. 1 is the light focusing unit structural representation of the utility model solar heat collector and light focusing unit thereof.
Fig. 2 is the collector structure synoptic diagram of the utility model solar heat collector and light focusing unit thereof.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
At first, please refer to Fig. 1, Fig. 1 is the light focusing unit structural representation of the utility model solar heat collector and light focusing unit thereof, described light focusing unit is made up of five level crossings 20,11,12,13,15, five described level crossings arrange side by side, and the central point of five described level crossings is located along the same line, and five described level crossings all link to each other with whirligig.Can see among Fig. 1 that central point A, the B of five level crossings, C, D, E are located along the same line, sun directional light 10 is mapped on five level crossings and is reflected onto heat collector 14.Because the cost that uses level crossing is far below circular-arc condenser, therefore, this structure greatly reduces cost under the prerequisite that guarantees spotlight effect.
Then, please refer to Fig. 2, Fig. 2 is the collector structure synoptic diagram of the utility model solar heat collector and light focusing unit thereof, and this solar heat collector comprises concentration module 100 and receiver 20.Concentration module 100 usefulness supports 20 support, wherein said this concentration module 100 is in order to reflex to sunshine described receiver 20, and this receiver 20 is by propping up the top that is set up in concentration module 100, described concentration module 100 comprises a plurality of light focusing unit, each described light focusing unit is formed by a plurality of level crossings, described light focusing unit is made up of five level crossings, five described level crossings arrange side by side, and the central point of five described level crossings is located along the same line, and five described level crossings all link to each other with whirligig.This solar tracking structure has description in the prior art, no longer describes in detail herein.
Described receiver 20 is divided into several sections, connects by a transfer tube between every section, and every section endothermic tubes that include a series of extensions that are parallel to each other of described receiver 20, the two ends of described endothermic tube all are connected with the transfer tube at this section receiver 20 two ends.Described endothermic tube surface is coated with semiconductor absorption layer and protective oxide film successively.A series of common cavitys that form of described endothermic tube that are parallel to each other and extend of every section described receiver 20, and described cavity is provided with an opening in the face of an end of concentration module 100, the sunshine that focuses on from concentration module 100 enters cavity from opening, and repeatedly reflects in cavity and be absorbed.The cavity of described receiver 20 is arch or horseshoe-shaped structure.Every section described receiver 20 two ends are provided with mounting flange, are provided with splitter box between the mounting flange, and this splitter box one end is connected with transfer tube, and the other end is connected with all endothermic tube ports.
Owing to the solar radiation energy that reaches 45% mainly concentrates in the spectral range of wavelength for the visible light of (0.3-0.7 μ m); therefore can be coated with coated semiconductor and protective oxide film successively on the endothermic tube surface; this coated semiconductor is as coating for selective absorption; in field of solar energy utilization; desirable selectivity absorbing material is the visible light part absorption fully to sunshine; promptly to the light absorption height of visible light wave range; and infrared band is had very high reflectivity; simultaneously also utilize the low infrared emissivity of base metal material (metal heat absorption tube) and improve the infrared reflectivity of whole endothermic tube; promptly reduce the emissivity of region of ultra-red as far as possible, to reduce the blackbody radiation of receiver.Owing to have energy gap Eg in the semiconductor material, it can only absorb the wavelength of energy greater than Eg, so there is a cutoff wavelength λ c (λ c (μ m)=1.24/Eg (eV)), promptly has only visible, the ultraviolet light of wavelength X＜λ c etc., can make just that electronics generation transition enters conduction band in the semiconductor, cause particle collision in electronics and the lattice, luminous energy is converted into heat energy; And see through this coated semiconductor because of low not being absorbed of energy for the infrared light of wavelength X＞λ c, and utilize the high reflection characteristic of metal heat absorption tube (being generally copper or iron) to reflect, thus constituted the spectral selectivity absorption of coated semiconductor.Usually the energy gap of Ge, Si, GaAs at room temperature is respectively 0.66eV, 1.12eV, 1.42eV, be that its corresponding cutoff wavelength λ c (μ m) should be 1.88,1.11,0.87 mutually, so wavelength is that the visible light of (0.3-0.7 μ m) all can well be absorbed by the coating of above-mentioned semiconductor material.
And this protective oxide film mainly is the very little dielectric of extinction coefficient, as Al
2O
3, SiO
2Deng; thickness normally in 1/4th visible wavelength ranges, can play the effect of anti-reflection visible light, and this protective oxide film has stronger resistance to corrosion and thermal stability simultaneously; thereby also can protect coated semiconductor and metal heat absorption tube, anti-oxidation and corrosion.
Compared with prior art, the utility model is by being divided into several sections with receiver, connect by a transfer tube between every section, and every section endothermic tubes that include a series of extensions that are parallel to each other of receiver, the two ends of these endothermic tubes all are connected with the transfer tube at this section receiver two ends, by setting like this, the heat-transfer fluid that flows out from the endothermic tube of every section receiver flows into the transfer tube mixes, heat-shift, flow into again in next section receiver afterwards and absorb heat, so can make full use of the heat absorption capacity of heat-exchange fluid, and overcome in the existing receiver endothermic tube heat-transfer fluid uneven defective of being heated, thereby be more conducive to improve heat absorption and heat transfer efficiency, also can overcome the defective of endothermic tube temperature distortion inequality simultaneously.To be made as vacuum between transparent cover body and the sealing lid simultaneously; thereby can effectively reduce the convection heat losses; improve the heat absorption efficiency of receiver; and by coated semiconductor and protective oxide film being set on the endothermic tube surface; can be also with better absorption sunshine; and not external irradiating infrared light; thereby make the thermal equilibrium temperature of this receiver cavity less; with blackbody radiation and the raising luminous energy-thermal energy conversion efficiency that reduces receiver; utilize protective oxide film can make coated semiconductor and metal heat absorption tube and air insulated simultaneously; thereby avoid coated semiconductor and metal heat absorption tube oxidation, thereby increase the serviceable life of receiver.
Though the utility model discloses as above with preferred embodiment, the utility model is not to be defined in this.Any those skilled in the art in not breaking away from spirit and scope of the present utility model, all can do various changes and modification, and therefore protection domain of the present utility model should be as the criterion with claim institute restricted portion.
Claims (7)
1. the light focusing unit of a solar heat collector, it is characterized in that: described light focusing unit is made up of five level crossings, five described level crossings arrange side by side, and the central point of five described level crossings is located along the same line, and five described level crossings all link to each other with whirligig.
2. solar heat collector, comprise receiver and concentration module, wherein said this concentration module is in order to reflex to sunshine described receiver, and this receiver is by propping up the top that is set up in concentration module, described concentration module comprises a plurality of light focusing unit, it is characterized in that: described light focusing unit is made up of five level crossings, and five described level crossings arrange side by side, and the central point of five described level crossings is located along the same line, and five described level crossings all link to each other with whirligig.
3. solar heat collector as claimed in claim 2, it is characterized in that: described receiver is divided into several sections, connect by a transfer tube between every section, and every section of described receiver includes a series of endothermic tubes that are parallel to each other and extend, and the two ends of described endothermic tube all are connected with the transfer tube at this section receiver two ends.
4. solar heat collector as claimed in claim 3 is characterized in that: described endothermic tube surface is coated with semiconductor absorption layer and protective oxide film successively.
5. solar heat collector as claimed in claim 3, it is characterized in that: a series of common cavitys that form of described endothermic tube that are parallel to each other and extend of every section described receiver, and described cavity is provided with an opening in the face of an end of concentration module, the sunshine that focuses on from concentration module enters cavity from opening, and repeatedly reflects in cavity and be absorbed.
6. solar heat collector as claimed in claim 2 is characterized in that: the cavity of described receiver is arch or horseshoe-shaped structure.
7. solar heat collector as claimed in claim 2 is characterized in that: every section described receiver two ends are provided with mounting flange, are provided with splitter box between the mounting flange, and this splitter box one end is connected with transfer tube, and the other end is connected with all endothermic tube ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205780238U CN201828705U (en) | 2010-10-26 | 2010-10-26 | Solar collector and light condensing units thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205780238U CN201828705U (en) | 2010-10-26 | 2010-10-26 | Solar collector and light condensing units thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201828705U true CN201828705U (en) | 2011-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010205780238U Expired - Fee Related CN201828705U (en) | 2010-10-26 | 2010-10-26 | Solar collector and light condensing units thereof |
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| CN (1) | CN201828705U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798969A (en) * | 2012-08-24 | 2012-11-28 | 杨永顺 | Lens unit array condenser |
| CN102967055A (en) * | 2012-11-09 | 2013-03-13 | 青海中控太阳能发电有限公司 | Heliostat field combined by small-area plane heliostat and large convergent heliostat |
| CN104601101A (en) * | 2014-12-24 | 2015-05-06 | 锦州东大太阳能工程技术有限公司 | Solar frequency division and concentrated light transfer device and photovoltaic generating system thereof |
-
2010
- 2010-10-26 CN CN2010205780238U patent/CN201828705U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102798969A (en) * | 2012-08-24 | 2012-11-28 | 杨永顺 | Lens unit array condenser |
| CN102967055A (en) * | 2012-11-09 | 2013-03-13 | 青海中控太阳能发电有限公司 | Heliostat field combined by small-area plane heliostat and large convergent heliostat |
| CN102967055B (en) * | 2012-11-09 | 2015-02-11 | 青海中控太阳能发电有限公司 | Heliostat field combined by small-area plane heliostat and large convergent heliostat |
| CN104601101A (en) * | 2014-12-24 | 2015-05-06 | 锦州东大太阳能工程技术有限公司 | Solar frequency division and concentrated light transfer device and photovoltaic generating system thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20131026 |