CN202485242U - Solar thermal collector based on slot-type parabolic reflector and artificial blackbody - Google Patents
Solar thermal collector based on slot-type parabolic reflector and artificial blackbody Download PDFInfo
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- CN202485242U CN202485242U CN2012200672081U CN201220067208U CN202485242U CN 202485242 U CN202485242 U CN 202485242U CN 2012200672081 U CN2012200672081 U CN 2012200672081U CN 201220067208 U CN201220067208 U CN 201220067208U CN 202485242 U CN202485242 U CN 202485242U
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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
- Y02E10/47—Mountings or tracking
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Abstract
The utility model discloses a solar thermal collector based on a slot-type parabolic reflector and an artificial blackbody. Three vacuum thermal-collecting tubes are arranged in a cavity, so that reflection losses due to direct sunshine are reduced, and the solar absorptivity is improved; the design of dual-reflector condensation with a slot-type paraboloid and an ellipsoid is used, so that reflected light can be focused on thermal-collecting tubes well, and simultaneously, the coupling degree of the slot-type solar thermal collector and sunshine is improved; and vacuum thermal-collecting tubes are installed at a lower portion of a focusing device, so that a condensation panel can conduct solar tracking conveniently. Besides, the solar thermal collector has the advantages that the collector is convenient to install, influence of external shocks on glass tubes is little, fluid leakage phenomena caused by rotation of thermal-collecting tubes are eliminated simultaneously and the like.
Description
Technical field
The utility model relates to a kind of solar thermal collector, particularly a kind of solar thermal collector based on groove type paraboloid speculum and artificial black matrix
Background technology
At present, solar thermal collector commonly used has flat plate collector, vacuum tube collector, solar energy air heat collector, solar concentrating collector etc.Wherein, solar concentrating collector is compared with other heat collectors and can obviously be improved heat-collecting temperature.
Solar concentrating collector mainly is divided into two kinds of point focusing thermal-arrest, line focus thermal-arrests.Though the point focusing solar thermal collector can obtain the high temperature heat source of several Baidu even thousands of degree, cost and cost are higher, and high temperature utilizes the field obviously not need so high temperature in solar energy, sometimes even can cause the damage of absorber.At present line focus type solar thermal collection system can be divided into four kinds of groove type paraboloid, line focus Fresnel Lenses, fresnel reflecting mirror and non-imaging concentrators again by the difference of concentrator kind.
The beam condensing unit of groove type paraboloid solar heat collector mainly contains, the speculum of the Flagsol company that adopts in the groove type paraboloid heat collector of Bakos design, and thickness is 0.4cm only, and reflectivity is up to 98%.Arasuc adopts wooden die and glass fibre to prepare speculum; With glass fibre being bonded on the hand-built wooden die from level to level; Form the parabolic panel of 7mm fiberglass+12.ScmPVC material; Be stained with flexible reflecting material above that and form the speculum with certain intensity, adopt the concentrator of the A/F 80cm that this method processes to shine the absorption tube of diameter 1.28cm, optical efficiency can reach 69%.1981, Uroshevich just proposed to adopt the patent of the two-stage concentrating method that two concave surface cylindricality mirrors form.Because one pole CPC optically focused is than very limited; Can not sunshine be gathered into the very high light beam of intensity; In order to improve the optically focused ratio, modal way is exactly that a plurality of CPC are stacked, through repeatedly assemble sun light beam energy-flux density is got a promotion light belt change width that the one-level concentrator forms is very big; In order to obtain higher optically focused ratio, the secondary beam condensing unit has been introduced into the groove type paraboloid solar heat collector.Omer adopts two-dimentional CPC as the secondary beam condensing unit, and maximum geometric concentrating ratio surpasses 180.As the secondary beam condensing unit, the optically focused ratio can reach 214 to Brunotte, optical efficiency 77.5% three-dimensional CPC.Richter has proposed the heat collector of half-cylindrical speculum and Gauss surface secondary concentrator composition, and geometric concentrating ratio can reach more than 82 and can guarantee whole day work in 8 hours.Just utilized this thought in the solar air-conditioner system of U.S. Duke company, what only they adopted is CPC secondary beam condensing unit, and the optically focused ratio of heat collector can reach 86, and optical efficiency is 56%.But the load of installing for ease and reducing tracing system sometimes, some system then keeps the one-level beam condensing unit static, only relies on moving of absorber to realize focusing on.
The absorber of groove type paraboloid solar heat collector mainly contains vacuum heat collection pipe and cavity absorber, and vacuum heat collection pipe is a kind of efficient solar heat-collection elements, and its advantage is: the absorptivity that selective coating can improve sunlight reduces its emissivity; It is zero that vacuum interlayer makes the convection heat losses between two pipes, and the thermal-collecting tube external diameter is less, and transparent; Both can reduce screening shadow, also can reduce the convection current heat waste of outer surface, be produced on a large scale sunlight; Running temperature is high, is easy to design and assembly.Combine with condenser mirror, can reach 300～400 ℃ running temperature; Shortcoming is: outside energy loss by radiation is arranged; The connection request of metal and glass is higher in the running; Be difficult to reach in the long-time running process vacuum that keeps in the interlayer repeatedly under the alternating temperature; Coating for selective absorption because of with the disunity of metal tube expansion system, and under the high temperature that is prone to come off, there is problem of aging in coating for selective absorption; Its structure of cavity type absorber is a flute profile cavity, and outer surface covers heat-barrier material.Utilize the black body effect of cavity, can fully absorb the sunlight after the focusing.Compare with vacuum heat collection pipe, the cavity absorber has lower direct projection energy-flux density, and the cavity wall temperature is more even; Has lower projection radiation energy density; Hot property is stable, and collecting efficiency is high, need not the optical selective coating; Only need traditional material and processing technology, cost is low and be convenient to safeguard advantage such as hot property long-term stability.But optics effectiveness is run well not as vacuum heat-collecting.
Though the utility model patent CN201037705Y of the People's Republic of China (PRC) provides a kind of solar thermal collector with reflecting plate; But the vacuum heat collection pipe of this patent is arranged on the top of groove type paraboloid heat collector; Inconvenient installation; Thermal-collecting tube is subject to foreign impacts and fragmentation, and is unfavorable for the rotation of speculum and the insulation of thermal-collecting tube.
Solar thermal collector of the prior art all exists: 1. existing vacuum tube solar heating element is installed in the top of groove type paraboloid speculum through support; Speculum is followed the tracks of the solar time thermal-collecting tube and is needed to rotate with speculum; Thermal-collecting tube occurs leakage easily, receives foreign impacts and phenomenons such as fragmentation, and is unfavorable for the rotation of speculum.2. existing vacuum heat collection pipe has the heat loss through radiation loss to the external world, when solar radiation is to thermal-collecting tube simultaneously reflection loss is arranged, and causes the not high defective of sunlight utilization rate.Be badly in need of a kind of solar thermal collector that can overcome above defective at present.
Summary of the invention
The purpose of the utility model provides a kind of solar thermal collector cheap simple in structure that can overcome above defective.
The utility model is realized through following technical proposal: a kind of solar thermal collector based on groove type paraboloid speculum and artificial black matrix; Mainly form by groove type paraboloid speculum, cavity type vacuum heat collection pipe group and solar tracking device three parts; Also comprise: the device seat of a rectangle; The rectangular thermal-arrest cavity bearing of four flutings; Broad ways is arranged on three the trapezoidal mirror supports that are on the device seat, and is separately positioned on fore bearing and first rear bearing and second rear bearing on the said mirror support, and power transmission shaft is connected on the fore bearing and first rear bearing; Fixed-site near first rear bearing on power transmission shaft connects travelling gear; Artificial blackbody chamber with light inlet is fixed on the bearing through overhanging connecting plate, in the set inside of artificial blackbody chamber the vacuum heat collection pipe group is arranged, and is fixedly connected with two groups of principal reflection mirror supports in the symmetrical both sides of the outside of artificial blackbody chamber; Said every group of principal reflection mirror support is welded on a slice principal reflection mirror; The reflecting surface of said two principal reflection mirrors is formed a groove type paraboloid, and its focus is provided with a slice at said two and has the secondary speculum that part is oval cylinder on optical axis above the principal reflection mirror; Said secondary speculum is supported by four the secondary mirror supports that pass said two principal reflection mirrors that are separately positioned on two groups of principal reflection mirror supports; Secondary mirror reflection surface is an ellipsoid, and focus overlaps with the groove type paraboloid focus on its ellipsoid, and focus focus on ellipsoid is located about the groove type paraboloid symmetry under the ellipsoid.
Further, the said groove type paraboloid that the reflecting surface of said two principal reflection mirrors is formed, axial length is 2M, and focal length is 4M, and the thickness of said every principal reflection mirror is 0.4CM, and the light inlet A/F of said artificial blackbody chamber is 3-8CM; It is 0.55M that said secondary mirror reflection surface is formed said ellipsoid axial length, and last focal length is 1M, and following focal length is 5M, and promptly real focal length is 2M, and the thickness of said secondary speculum is 3CM.
Further, the inwall of said artificial blackbody chamber posts the reflectance coating of high reflectance.
Further; Said cavity type vacuum heat collection pipe group is linked together through the thermal-collecting tube support by three vacuum solar heat-collecting pipes; The thermal-collecting tube support is isosceles triangle substantially, and each angle is provided with rectangular fulcrum, and three said fulcrums are welded on the inwall of said artificial blackbody chamber.
The solar thermal collector of the utility model adopts the double mirror of groove type paraboloid and ellipsoid to reach and sunlight is focused in the heat collector cavity that into has a sulculus, follow the tracks of the solar time heat collector cavity at speculum simultaneously and keep motionless purpose; Establish three vacuum heat collection pipes in the cavity, eliminated the reflection loss of light that the sunlight direct projection causes, improve the sunlight absorption efficiency of cavity at the aperture place.
Have the heat loss through radiation loss of minimizing thermal-collecting tube and the reflection loss of sunlight, improve collecting efficiency; Heat collector cavity is fixed, overcomes existing heat collector and causes the leakage shortcoming because of thermal-collecting tube rotates; Thermal-collecting tube receives foreign impacts to influence the little significant advantage of Denging.
Description of drawings
Fig. 1 is based on the normal axomometric drawing of the solar thermal collector of groove type paraboloid speculum and artificial black matrix;
Fig. 2 is based on the front view of the solar thermal collector of groove type paraboloid speculum and artificial black matrix;
Fig. 3 is a groove type paraboloid mirror structure sketch map;
Fig. 4 is a cavity type vacuum heat collection pipe group structural representation;
Fig. 5 is the heat collector cavity structural representation;
Fig. 6 is a heat collector seat structure sketch map.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.Extremely shown in Figure 6 like Fig. 1; A kind of solar thermal collector based on groove type paraboloid speculum and artificial black matrix; Form by groove type paraboloid speculum and cavity type vacuum heat collection pipe group two parts; Also comprise: the rectangular thermal-arrest cavity bearing 9 of 10, four flutings of device seat of a rectangle, broad ways are arranged on three the trapezoidal mirror supports 6 that are on the device seat 10; And be separately positioned on fore bearing 11 and first rear bearing 4 and second rear bearing 5 on the said mirror support 6; Power transmission shaft is connected on the fore bearing 11 and first rear bearing 4, and the fixed-site near first rear bearing 4 on power transmission shaft connects travelling gear 3, and the artificial blackbody chamber 13 with light inlet is fixed on the bearing 9 through overhanging connecting plate 12; Set inside at artificial blackbody chamber 13 has vacuum heat collection pipe group 15; Symmetrical both sides in the outside of artificial blackbody chamber 13 are fixedly connected with two groups of principal reflection mirror supports 2, and said every group of principal reflection mirror support 2 is welded on a slice principal reflection mirror 7, and the reflecting surface of said two principal reflection mirrors 7 is formed a groove type paraboloid; Its focus is on optical axis; When the directional light that is parallel to optical axis is incident on the groove type paraboloid, can with the incident light reflect focalization on said focus, on said two principal reflection mirrors 7, be provided with a slice and have the secondary speculum 1 that part is oval cylinder, said secondary speculum 1 is supported by four the secondary mirror supports 2 that pass said two principal reflection mirrors 1 that are separately positioned on two groups of principal reflection mirror supports 2; Secondary speculum 1 reflecting surface is an ellipsoid; Focus overlaps with the groove type paraboloid focus on its ellipsoid, and focus is on the cavity type vacuum heat collection pipe group 16 of focus on the ellipsoid about groove type paraboloid symmetry place, when the reflex time of the reverberation that gathers focus on the ellipsoid through ellipsoid under the ellipsoid; Secondary reflection again can take place, and finally focuses on the cavity type vacuum heat collection pipe group 16 that is positioned at the following said artificial blackbody chamber of groove type paraboloid 15 inside.
The said groove type paraboloid that the reflecting surface of said two principal reflection mirrors 7 is formed, axial length is 2M, and focal length is 4M, and the thickness of said every principal reflection mirror 7 is 0.4CM, and the light inlet A/F of said artificial blackbody chamber 12 is 3-8CM; It is 0.55M that said secondary speculum 14 reflectings surface are formed said ellipsoid axial length, and last focal length is 1M, and following focal length is 5M, and promptly real focal length is 2M, and the thickness of said secondary speculum 14 is 3CM.
The inwall of said artificial blackbody chamber 13 posts the reflectance coating of high reflectance, thereby reduces thermal-collecting tube heat loss through radiation to external world.Said cavity type vacuum heat collection pipe group 16 is linked together through thermal-collecting tube support 15 by three vacuum solar heat-collecting pipes; Thermal-collecting tube support 15 is isosceles triangle substantially; Each angle is provided with rectangular fulcrum 17; Three said fulcrums 17 are welded on the inwall of said artificial blackbody chamber 13, and when groove type paraboloid speculum during around the rotation of said center transmission shaft, cavity type vacuum heat collection pipe group 15 keeps motionless.
The solar thermal collector of the utility model adopts the double mirror of groove type paraboloid and ellipsoid to reach sunlight is focused on and has in the heat collector cavity of a sulculus, follow the tracks of the motionless purpose of solar time heat collector cavity maintenance at speculum simultaneously; Establish three vacuum heat collection pipes in the cavity, eliminated the reflection loss of light that the sunlight direct projection causes, improve the sunlight absorption efficiency of cavity at the aperture place.
Have loss of the thermal-collecting tube of minimizing heat loss through radiation and sunlight and shine the reflection loss on the thermal-collecting tube, improve collecting efficiency; Heat collector cavity is fixed, has overcome the leakage shortcoming that existing heat collector causes because of rotation; Thermal-collecting tube receives foreign impacts to influence the little significant advantage of Denging.
The characteristics of the utility model are mainly:
1, thermal-collecting tube is placed in the device bottom, is in order to make heat collector cavity fixed when reflective mirror rotates, to overcome existing heat collector and cause the shortcoming of leak of liquid because of thermal-collecting tube rotates, and make reflective mirror can carry out solar tracking flexibly;
2, artificial black matrix inner surface scribbles high reflecting material and three vacuum tube thermal-collecting tubes is set, and is in order better to reach the absorption to sunlight.
Claims (4)
1. solar thermal collector based on groove type paraboloid speculum and artificial black matrix; Mainly form by groove type paraboloid speculum, cavity type vacuum heat collection pipe group and solar tracking device three parts; Also comprise: the device seat of a rectangle (10); The rectangular thermal-arrest cavity bearing (9) of four flutings; Broad ways is arranged on trapezoidal three mirror supports (6) that are on the device seat (10), and is separately positioned on fore bearing (11) and first rear bearing (4) and second rear bearing (5) on the said mirror support (6), and power transmission shaft is connected on fore bearing (11) and first rear bearing (4); Fixed-site near first rear bearing (4) on power transmission shaft connects travelling gear (3); It is characterized in that: the artificial blackbody chamber (13) with light inlet is fixed on the bearing (9) through overhanging connecting plate (12), in the set inside of artificial blackbody chamber (13) vacuum heat collection pipe group (15) is arranged, and is fixedly connected with two groups of principal reflection mirror supports (2) in the symmetrical both sides of the outside of artificial blackbody chamber (13); Said every group of principal reflection mirror support (2) is welded on (7) on a slice principal reflection mirror; The reflecting surface of said two principal reflection mirrors (7) is formed a groove type paraboloid, and its focus is provided with a slice and has the secondary speculum (1) that part is oval cylinder on optical axis on said two principal reflection mirrors (7); Said secondary speculum (1) is supported by four the secondary mirror supports (2) that pass said two principal reflection mirrors (1) that are separately positioned on two groups of principal reflection mirror supports (2); Secondary speculum (1) reflecting surface is an ellipsoid, and focus overlaps with the groove type paraboloid focus on its ellipsoid, and focus focus on ellipsoid is located about the groove type paraboloid symmetry under the ellipsoid.
2. according to claim 1 based on the solar thermal collector of groove type paraboloid speculum and artificial black matrix; It is characterized in that: the said groove type paraboloid that the reflecting surface of said two principal reflection mirrors (7) is formed; Axial length is 2M; Focal length is 4M, and the thickness of said every principal reflection mirror (7) is 0.4CM, and the light inlet A/F of said artificial blackbody chamber (12) is 3-8CM; It is 0.55M that said secondary speculum (14) reflecting surface is formed said ellipsoid axial length, and last focal length is 1M, and following focal length is 5M, and promptly real focal length is 2M, and the thickness of said secondary speculum (14) is 3CM.
3. according to claim 1 based on the solar thermal collector of groove type paraboloid speculum and artificial black matrix, it is characterized in that: the inwall of said artificial blackbody chamber (13) posts the reflectance coating of high reflectance.
4. according to claim 1 based on the solar thermal collector of groove type paraboloid speculum and artificial black matrix; It is characterized in that: said cavity type vacuum heat collection pipe group (16) is linked together through thermal-collecting tube support (15) by three vacuum solar heat-collecting pipes; Thermal-collecting tube support (15) is isosceles triangle substantially; Each angle is provided with rectangular fulcrum (17), and three said fulcrums (17) are welded on the inwall of said artificial blackbody chamber (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200672081U CN202485242U (en) | 2012-02-28 | 2012-02-28 | Solar thermal collector based on slot-type parabolic reflector and artificial blackbody |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012200672081U CN202485242U (en) | 2012-02-28 | 2012-02-28 | Solar thermal collector based on slot-type parabolic reflector and artificial blackbody |
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| CN202485242U true CN202485242U (en) | 2012-10-10 |
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| CN2012200672081U Expired - Fee Related CN202485242U (en) | 2012-02-28 | 2012-02-28 | Solar thermal collector based on slot-type parabolic reflector and artificial blackbody |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620442A (en) * | 2012-02-28 | 2012-08-01 | 中国石油大学(华东) | Solar heat collector based on groove type parabolic mirror and artificial blackbody |
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2012
- 2012-02-28 CN CN2012200672081U patent/CN202485242U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102620442A (en) * | 2012-02-28 | 2012-08-01 | 中国石油大学(华东) | Solar heat collector based on groove type parabolic mirror and artificial blackbody |
| CN102620442B (en) * | 2012-02-28 | 2014-04-02 | 中国石油大学(华东) | Solar heat collector based on groove type parabolic mirror and artificial blackbody |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20140228 |