CN202792603U - Bridge-type composite Fresnel linear condensation and reflection unit with high capacity and a high condensation ratio - Google Patents

Bridge-type composite Fresnel linear condensation and reflection unit with high capacity and a high condensation ratio Download PDF

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Publication number
CN202792603U
CN202792603U CN201220346960XU CN201220346960U CN202792603U CN 202792603 U CN202792603 U CN 202792603U CN 201220346960X U CN201220346960X U CN 201220346960XU CN 201220346960 U CN201220346960 U CN 201220346960U CN 202792603 U CN202792603 U CN 202792603U
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reflector
collecting tube
center
bridge
heat collecting
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陈宇
汤延令
曾忠旺
陈献春
张锦坤
何多微
蒋孝科
王寅
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Electric Power Research Institute of State Grid Fujian Electric Power Co Ltd
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Electric Power Research Institute of State Grid Fujian Electric Power Co Ltd
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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
    • F24S2023/87—Reflectors layout
    • F24S2023/872—Assemblies of spaced reflective elements on common support, e.g. Fresnel reflectors
    • 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
    • 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
    • Y02E10/50—Photovoltaic [PV] energy

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Abstract

本实用新型涉及一种具有聚焦元件的太阳能集热器，特别是一种桥式大容量高聚光比复合菲涅尔线聚光反射装置，其结构要点在于，主反射装置由复数个微弧菲涅尔反射镜组成，且该复数个菲涅尔反射镜位于集热管的上方，呈一种桥式的分布结构，该结构包括水平段和以该水平段为中心对称的左右两弧度段；还包括有一种副反射装置，其安装在集热管下方，弧形内凹面面向集热管方向。本实用新型优点在于：能够使得本实用新型所述菲涅尔线聚光反射装置获得较大的地面利用率，充分考虑了阳光的入射情况，大大减少了阳光的散失，提高了集热管的集热效果，同时实现了良好的聚焦效果和对集热管均匀受热的效果，体现了其大容量的聚光效果。

Figure 201220346960

The utility model relates to a solar heat collector with a focusing element, in particular to a bridge-type large-capacity high-concentration ratio composite Fresnel line light-concentrating reflector. Composed of Fresnel reflectors, and the plurality of Fresnel reflectors are located above the heat collecting tubes, showing a bridge-like distribution structure, which includes a horizontal section and two left and right arc sections symmetrical to the horizontal section; it also includes There is a secondary reflection device, which is installed under the heat collecting tube, and the arc-shaped inner concave surface faces the direction of the heat collecting tube. The utility model has the advantages of: it can make the Fresnel line concentrating and reflecting device described in the utility model obtain a larger ground utilization rate, fully consider the incidence of sunlight, greatly reduce the loss of sunlight, and improve the collection efficiency of the heat collecting tube. At the same time, it achieves a good focusing effect and a uniform heating effect on the heat collecting tube, which reflects its large-capacity light concentrating effect.

Figure 201220346960

Description

The compound Fresnel line of the large capacity high concentration ratio of bridge-type condensing reflection device
Technical field
The utility model relates to the compound Fresnel line of the large capacity high concentration ratio of a kind of solar thermal collector with concentrating element, particularly a kind of bridge-type condensing reflection device.
Background technology
Fresnel Lenses has the optically focused effect, in the application of the large-scale beam condensing unit of solar energy thermal-power-generating, mainly adopts reflective Fresnel equipment.The kind of Fresnel reflection unit is a lot of in the prior art, close-coupled line focus fresnel reflector (Compact Linear Fresnel Reflector such as extensive use, be called for short CLFR), form with reference to patent ZL200880112788.8 by a plurality of fresnel reflecting mirrors of the compact arrangement that is distributed in the below and the solar energy heat collection pipe of top; Also having parabola slot light collection device, also is the solar energy thermal-power-generating beam condensing unit of commonly using, and its employed speculum adopts parabola shaped, and concave surface is towards solar direction, and assembling above concave surface that the position arranges too can thermal-collecting tube; Also have tower beam condensing unit, it comprises the tower type solar collecting apparatus that is positioned at central point and take this center as the multi-layer annular parabola dish formula Fresnel reflection device of the outside Boulez in the center of circle; In addition, the Fresnel line condensing reflection device that also has a kind of secondary reflection, it is on the basis of similar CLFR structure, on thermal-collecting tube top the secondary reflection cover is set, with reference to disclosures in Italian patent application RM2010A000437, in order to sunlight reflected is arrived the thermal-collecting tube top, heat absorption with balanced thermal-collecting tube, also scatter and disappear because of the sunlight that focusing error causes for reflection, this mainly is that the focusing distance when different angles is different because of the difference of bottom reflection eyeglass owing to incidence angle.
Yet beam condensing unit described above have many weak points: the capacity of tower beam condensing unit and parabola dish formula beam condensing unit is little, the more tower beam condensing unit of parabola slot light collection installed capacity and parabola dish formula beam condensing unit large, commonly use at present a kind of, but usually be no more than 100MW, and the capacity of CLFR can do more and cost is lower., then there is following problem in CLFR capacious:
At first, as shown in Figure 1, in the situation of sunlight Y vertical irradiation, for reverberation is not obstructed, needing between the adjacent mirror sheet 2 has certain interval S, and the light that is reflected to avoid is blocked near that reflecting optics of thermal-collecting tube 1, and larger from the interval that the reflecting optics of thermal-collecting tube away from more needs, this has just caused the sunlight leakage, has affected the ground utilization rate.If sunlight casts oblique rays on to reflecting optics from the far-end (namely away from thermal-collecting tube) of thermal-collecting tube, the interval between the reflecting optics also needs further increasing, and this can cause the sunlight that more strengthens to leak.Among the figure, β is the angle between the vertical line of thermal-collecting tube and principal reflection device and the boundary a that principal reflection eyeglass reverberation is not blocked, the x length that to be thermal-collecting tube extend to both sides perpendicular to the point of principal reflection device, when eyeglass width enough little (namely trending towards in theory 0) time, can calculate in the situation that reflection is not blocked, in x width shown in Figure 1, the effective width of speculum under these conditions is
Figure BDA00001899119400021
When x equated with the height d of thermal-collecting tube, the effective width of speculum was approximately 0.88 times of d; When x when being 2 times of d the effective width of speculum be approximately 1.444 times of d; When x when being 3 times of d the effective width of speculum be approximately 1.818 times of d.As seen the wider then validity of the width of speculum is poorer.The width of the speculum of practical application not can → 0, can prove that following formula is the maximum effective width that can obtain, the width of single speculum is wider, the effective width in certain x is less.
Secondly, the radian of the reflector plate of CLFR is nonadjustable at present, the 1st, and the speculum distance set heat pipe of mid portion is closer, and the speculum distance set heat pipe of both sides is distant, if all speculums all are the same radians, will certainly some focusing mirror effect bad; The 2nd, although speculum can rotate with the variation of sunlight angle, the distance at speculum center and thermal-collecting tube center is constant, but the difference with the solar angle degree, the position of reflecting mirror focal length will change, such as accompanying drawing 2 and accompanying drawing 3, when becoming 30 ° of angles with speculum, sunlight (sees accompanying drawing 3), half of (seeing accompanying drawing 2) when its focusing distance (the speculum center is to the distance of focusing center) only has sunlight vertical with speculum.
In addition, just single (descending) side of the thermal-collecting tube of CLFR is heated, and it is inhomogeneous to be heated, and this has affected temperature and the caloric receptivity of thermal-collecting tube.
The Fresnel line condensing reflection device of secondary reflection can reduce scattering and disappearing of sunlight, but just at the heat collector place,
Figure BDA00001899119400022
Speculum exists and some same problems of CLFR, causes the degree improved limited, improvement
Figure BDA00001899119400023
Effect is uncontrollable (to be that different solar angles are different, in fact be if optically focused is accurate, secondary reflection device is unwanted, but horizontally disposed reflecting optics is difficult to accomplish, unless the radian of reflecting optics also changed when reflection angle changed), secondary reflection cover top also can keep the sun off.
The utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art part, and it is few to propose that a kind of large capacity, ground utilization rate are high, sunlight scatters and disappears, the compound Fresnel line of the large capacity high concentration ratio of the bridge-type that focusing effect and Heat-collecting effect are good condensing reflection device.
The utility model is realized by following approach:
The compound Fresnel line of the large capacity high concentration ratio of bridge-type condensing reflection device, include principal reflection device and thermal-collecting tube, its structural feature is, the principal reflection device is comprised of take differential of the arc Fresnel reflection eyeglass as principal reflection mirror a plurality of, the center of each principal reflection mirror is provided with transfer, and these a plurality of principal reflection eyeglasses are positioned at the top of thermal-collecting tube, the distributed architecture that is a kind of bridge-type, this structure comprise horizontal segment and symmetrical centered by this horizontal segment about two radian sections, centered by thermal-collecting tube, outwards extend with the angle [alpha] that makes progress in the tangential direction of one of horizontal segment two ends end points and to form described radian section;
Simultaneously the inner concave arc surface of each fresnel reflecting mirror is all towards the direction that sunlight incident is arranged, and when the line of centres of the central point of the direction of sunlight and principal reflection mirror and thermal-collecting tube was parallel, this sheet speculum carried out 180 ° upset; Also include a kind of secondary reflection unit, it is installed in the thermal-collecting tube below, and the arc inner concave is towards the thermal-collecting tube direction.
Described transfer can make fresnel reflecting mirror overturn according to the incident angle of sunlight.The fresnel reflecting mirror of the differential of the arc can be so that the larger reflecting optics of monolithic width focuses on the less thermal-collecting tube of diameter, thereby obtains higher sunlight utilization rate.And in order to reach higher ground utilization rate, need to analyze process that sunray changes to the impact of spotlight effect: for the light of vertical irradiation, the principal reflection mirror of horizontal segment mediates, at this moment sunlight is parallel to the direction of thermal-collecting tube with principal reflection mirror, principal reflection mirror is difficult to the thermal-collecting tube that flashes back the sunlight, the utilization of this part sunlight need to be by secondary reflection unit, the radian section of both sides can flash back the sunlight in this case and do not blocked does not have sunlight to leak yet, radian section spotlight effect when the sunlight vertical irradiation is relatively good in addition, can test the ground utilization rate of this class beam condensing unit during the sunlight vertical irradiation, usually (such as clfr) to be optically focused lower than higher ground utilization rate, and this device can higher optically focused than the time keep higher ground utilization rate.Situation for the sunlight setting sun, three sections situation is different, for recently holding, the radian section that direct sunlight is namely arranged, at this moment sunlight and speculum center are to the parallel position of the direction of thermal-collecting tube, be difficult to the thermal-collecting tube that flashes back the sunlight, the utilization of this part sunlight need to be by subreflector, but periphery may leak by some sunlight; Middle horizontal segment is when sunlight casts oblique rays on, and the utilization rate of sunlight is higher; The radian section of far-end is when sunlight casts oblique rays on, and the utilization rate of sunlight is lower, but this part shared area is less, and some solar radiation less than, so impact is little.Therefore the ground utilization rate is large, and sunlight scatters and disappears few.
The bridge-type distributed architecture of principal reflection mirror is conducive to the sunlight accepting to tilt, when sunlight tilts to certain degree, the effective area that whole reflection unit level is accepted face will greatly reduce, but the horizontal segment of intermediate projections can be kept the larger face of accepting when sunlight tilts.Bridge architecture is conducive to the improvement of reflection angle in addition, from the principal reflection mirror of the side of the sun away from, the incidence angle of sunlight is larger when tilting for sunlight, but because bridge architecture, this part principal reflection mirror may not have sunlight to arrive, so avoided larger incidence angle.
Fresnel reflecting mirror in the principal reflection device adopts differential of the arc structure, this differential of the arc is parabola shaped, and focus is at the thermal-collecting tube place, because the focal length camber line is distant, so radian can be very not large, the design of differential of the arc speculum, in technology and economic aspect reasonability is arranged, the speculum width is more much larger than the external diameter of thermal-collecting tube, the differential of the arc focuses on and to make it possible in the larger context the quantity of reasonable Arrangement reflecting optics (in condition situation suitable or easy to make, the reflecting optics of the shapes such as flat board and circle also can adopt), thus high concentration ratio carried.When the line of centres of the speculum of the direction of sunlight and principal reflection device and thermal-collecting tube was parallel, this sheet speculum need to be done about 180 ° upset, in order to change reflection direction.
The purpose of secondary reflection unit has two: at first be the effect of utilizing of having improved luminous energy, near the parallel position of the line of centres of the speculum of the direction of sunlight and principal reflection device and thermal-collecting tube, other eyeglasses of principal reflection device are because the restriction of position, be difficult to reflection ray, at this moment allow ray cast arrive subreflector, make this part light obtain to utilize; Next is that the ray cast of secondary reflection unit has arrived the position that main condenser can't shine on the thermal-collecting tube, makes being heated of thermal-collecting tube more even, has improved working condition and the heat-transfer effect of thermal-collecting tube.
This employing is the linear heat collection tube that is distributed in of circular arc with the principal reflection device take thermal-collecting tube as the center of circle, and the technical scheme of secondary reflection unit is set below thermal-collecting tube, can be so that Fresnel line condensing reflection device described in the utility model obtains higher ground utilization rate, taken into full account the condition of incidence of sunlight, greatly reduced scattering and disappearing of sunlight, improved the Heat-collecting effect of thermal-collecting tube, realize simultaneously good focusing effect and to the effect of thermal-collecting tube thermally equivalent, satisfied the demand of jumbo high concentration ratio.
The utility model can further be specially:
The width of secondary reflection unit is generally greater than the horizontal section length of principal reflection device.
Larger width can but also can raise the cost so that secondary reflection unit provides the function of regulating preferably and assisting reflection, and therefore the width of secondary reflection unit only need to be slightly larger than horizontal section length and gets final product.
The subreflector that secondary reflection unit adopts is a kind of parabola shaped condenser mirror, is provided with the driving transfer on this subreflector.
Described secondary reflection unit adopts a kind of integrally-built parabolic reflector as parabola slot light collection device, its need can be under the effect that drives transfer tracks sunlight, in order to can fully effectively sunlight be focused on the thermal-collecting tube.
Can also be:
Secondary reflection unit is that a plurality of Fresnel reflection eyeglasses form, and this a plurality of fresnel reflecting mirrors be centered close on the same straight line arc-shaped concave central vertical line sensing thermal-collecting tube center.
Described secondary reflection unit eyeglass arranges as the CLFR beam condensing unit of mentioning before, and fresnel reflecting mirror wherein is as subreflector, and the angle of inclination fixes, take thermal-collecting tube as focus optically focused.The reflecting effect of the secondary reflection unit of this structure is not as parabola shaped condenser mirror, but difference is very little, and the benefit of bringing is easily manufactured, and cost is low.
When enough little and overall width was x when the subreflector width, the usable reflection width of every subreflector was approximately
Figure BDA00001899119400051
Wherein β sees shown in the accompanying drawing 1, is the vertical line of thermal-collecting tube and secondary reflection unit and the fresnel reflecting mirror reflection ray formed angle that is not blocked, because β cos β≤cos (β/2) when being acute angle, or cos β≤
Figure BDA00001899119400052
So
Figure BDA00001899119400053
Figure BDA00001899119400054
That is to say that its effective reflective surface area Integral swinging is better than the CLFR beam condensing unit that monolithic swings situation, the integral body of secondary reflection unit is followed solar angle and is swung, automatically tracks sunlight.
The utility model can also further be specially:
The center of the principal reflection mirror of the radian section angle [alpha] that extends that distributes satisfies ln (ρ/ρ 0)=θ tg α; Wherein ρ 0 is the distance of thermal-collecting tube center to horizontal segment end reflections mirror Fd center, and ρ is that the mid point of a certain speculum Fh on the radian section is to the distance at thermal-collecting tube center; θ for take the thermal-collecting tube center as the summit, horizontal segment end reflections mirror Fd center outwards forwards the angle at this a certain speculum Fh center of radian section to as starting point.
In the required satisfied condition of above-mentioned α, when α=0, namely ρ=ρ 0, is degenerated to circle.This moment terminal line and horizontal angle with the thermal-collecting tube center take θ e as the radian section, the tangent line of radian section end and the angle of cut of vertical line are θ e+ α, when the inclination angle of sunlight during greater than θ e+ α, in the situation of same widths, technical scheme described in the utility model is accepted the area of sunlight will be greater than the CLFR that arranges at identical width lower plane.
The angle that the horizontal segment two ends of principal reflection device and thermal-collecting tube central point form
Figure BDA00001899119400055
Be 2 times α.
Like this, so that the junction of horizontal segment and radian section can accomplish to be smoothly connected, so that have good performance in the junction.
Spacing between the principal reflection mirror of horizontal segment is 1/2 to arrive
Figure BDA00001899119400056
Principal reflection mirror width doubly.
The spacing of principal reflection mirror not to be hindering as principle when the minimum angles of distally, arranges that the α that cuts angle that tendency forms is always constant but the advantage of such scheme is sunlight and principal reflection mirror, so that the layout of reflecting optics can be even.Guaranteed like this usable reflection of sunlight.
In the radian section if speculum half width and the ratio of mirror pitch less than but close to sin (45 °-α/2).
Can find out, be exactly that principal reflection mirror is circular situation when α=0, namely can accomplishing under any circumstance flashes back the sunlight can not be obstructed (might leakage be arranged in some occasion, depend on the width of subreflector), and this is a kind of method of definite reflector position.It is acceptable (just reduced effective usable floor area of speculum, do not hindered reverberation, also do not affected the ground utilization rate) that solar radiation is reflected blocking of mirror.During actual design, can be with reference to said method.
The utility model can also further be specially:
Fresnel reflecting mirror in the described principal reflection device, the transfer that is principal reflection mirror includes reflector mount, rotating shaft and support, speculum is installed on the reflector mount and forms rotor, reflector mount by the rotating shaft rotary support on support, rotating shaft core is positioned on the reflection direction of speculum, and this rotating shaft core is positioned at the thickness of speculum; A kind of counterweight is set, and this counterweight is connected with rotor, and is arranged on the extension line of rotor center of gravity and rotating shaft core line.
Speculum is basal plane according to its reflection cambered surface, side, concave arc place is reflection direction, side, convex arc place is back side direction, and the reflection direction of indication is not to be the reflected ray direction herein, and refers to section in the middle of the speculum cambered surface (or speculum peripheral outline form plane) normal direction.The rotating torque of utilizing this counterweight can balance to bring owing to rotor deviation of gravity center rotating shaft core.
The distance of speculum cancave cambered surface between up and down at the bottom of the line on two summits and the concave arc is the thickness of speculum.
In order to reduce the rotating torque of reflector, should shorten rotating shaft core and rotor (speculum and reflector mount) center of gravity distance until the two overlap; Because some speculum need overturn 180 °, if this rotating shaft core is positioned at outside the thickness of speculum, will additionally take up room again, it is not compact to cause whole solar array.
In sum, the utility model provides the compound Fresnel line of the large capacity high concentration ratio of a kind of bridge-type condensing reflection device, employing is distributed in heat collection tube with the distributed architecture of principal reflection device bridge-type, comprise horizontal segment and radian section, and the technical scheme of secondary reflection unit is set below thermal-collecting tube, can be so that Fresnel line condensing reflection device described in the utility model obtains larger ground utilization rate, taken into full account the condition of incidence of sunlight, greatly reduced scattering and disappearing of sunlight, improved the Heat-collecting effect of thermal-collecting tube, realize simultaneously good focusing effect and to the effect of thermal-collecting tube thermally equivalent, satisfied the demand of jumbo high concentration ratio.
Description of drawings
Fig. 1 is the analytical structure schematic diagram of the described CLFR of the utility model background technology under the sunlight vertical irradiation;
Fig. 2 is the focusing structure schematic diagram of the described CLFR of the utility model background technology when sunlight is vertical with speculum;
The focusing structure schematic diagram that Fig. 3 is the described CLFR of the utility model background technology when sunlight and speculum are 30 ° of angles;
Fig. 4 is the structural representation of embodiment 1 described in the utility model;
Fig. 5 is the structural representation of most preferred embodiment described in the utility model;
Fig. 6 is the Mathematical Modeling figure that reflector position described in the utility model is determined relation;
Fig. 7 is the structural representation of fresnel reflecting mirror in the principal reflection device described in the utility model.
Below in conjunction with accompanying drawing the utility model is described further.
The specific embodiment
Embodiment 1:
With reference to accompanying drawing 4, the compound Fresnel line of the large capacity high concentration ratio of bridge-type condensing reflection device, include principal reflection device 1 and thermal-collecting tube 2, principal reflection device 1 is that principal reflection mirror forms by a plurality of differential of the arc fresnel reflecting mirrors, the center of each fresnel reflecting mirror is provided with transfer 3, and these a plurality of fresnel reflecting mirrors are positioned at the top of thermal-collecting tube 2, the distributed architecture that is a kind of bridge-type, this structure comprise horizontal segment and symmetrical centered by this horizontal segment about two radian sections, centered by thermal-collecting tube, outwards extend with the angle [alpha] that makes progress in the tangential direction of one of horizontal segment two ends end points and to form described radian section; The center of the principal reflection mirror of the radian section angle [alpha] that extends that distributes satisfies ln (ρ/ρ 0)=θ tg α; See accompanying drawing 6, wherein ρ 0 is the distance of thermal-collecting tube center to horizontal segment end reflections mirror Fd center, and ρ is that the mid point of a certain speculum Fh on the radian section is to the distance at thermal-collecting tube center; θ for take the thermal-collecting tube center as the summit, horizontal segment end reflections mirror Fd center outwards forwards the angle at this a certain speculum Fh center of radian section to as starting point.Thermal-collecting tube can be glass-vacuum tube, also can be thermal-collecting tube or the photovoltaic power generation apparatus of other types.
Such as the horizontal segment two ends of principal reflection device and the angle of thermal-collecting tube central point formation
Figure BDA00001899119400071
Be 2 times α, horizontal segment and radian section can be in smoothing junction.The angle that principal reflection device 1 arc both sides end points and the center of circle, thermal-collecting tube 2 place form is 150 °, i.e. the angle theta e of the line in arc two ends and the center of circle, thermal-collecting tube 2 place and horizontal plane formation is 15 °.Simultaneously the inner concave arc surface of each fresnel reflecting mirror is all towards the direction that sunlight incident is arranged, incident direction that can tracks sunlight, and rotate thereupon; When the line of centres of the reflecting optics center of the direction of sunlight and principal reflection device and thermal-collecting tube was parallel, this sheet speculum carried out 180 ° upset.
Spacing between the principal reflection mirror of horizontal segment is 1/2 to arrive
Figure BDA00001899119400072
Principal reflection mirror width doubly.In the radian section if speculum half width and the ratio of mirror pitch less than sin (45 °-α/2).Spacing between the principal reflection mirror is mainly followed two principles, and the 1st, the situation of blocking reflected line can not be arranged, the 2nd, reduce as far as possible or eliminate the situation that sunlight leaks.
Also include a kind of secondary reflection unit 4, it is installed in thermal-collecting tube 1 below, adopt a kind of parabola shaped condenser mirror as subreflector, be provided with the driving transfer on this subreflector, this driving transfer can be that the revolving member that is directly installed on the subreflector center line adds the drive unit formation, also can be to be made of turning cylinder and drive unit on the triangle that is installed in subreflector or center of circle bracing frame and the bracing frame.The arc inner concave of subreflector is towards the thermal-collecting tube direction, tracks sunlight incident direction under the effect that drives transfer.
With reference to accompanying drawing 7, the transfer 3 of fresnel reflecting mirror comprises reflector mount 31, rotating shaft 32, counterweight 33 and support (not shown in FIG.), speculum 5 is installed on the reflector mount 31 and forms rotor, reflector mount 31 by rotating shaft 32 rotary supports on support, rotating shaft 32 axle center are positioned on the reflection direction of speculum, it is the C direction among Fig. 7, and, these rotating shaft 32 axle center also are positioned at the thickness of speculum and at 1/2nd thickness places of speculum, speculum thickness is the A among Fig. 7, simultaneously, rotating shaft 32 axle center also are positioned on the line of symmetry of speculum width.Speculum 5 is basal plane according to its reflection cambered surface, and side, concave arc place is reflection direction, i.e. C direction among Fig. 7; Side, convex arc place is back side direction, i.e. B direction among Fig. 7.The distance of speculum cancave cambered surface between up and down at the bottom of the line on two summits and the concave arc is the thickness of speculum, i.e. A among Fig. 7.Counterweight 33 is a kind of pendulum model structures, comprises the elongated body of rod and the hammer body of tail end, and the body of rod other end is fastenedly connected by a kind of structure and rotor of screw bolt, and counterweight 33 is arranged on the extension line of rotor center of gravity and rotating shaft 32 axial connecting lines.Speculum 5 two ends are coaxially arranged with respectively rotating shaft 32, and these two rotating shafts, 32 corresponding support and connection are in the supported hole of support, and like this, whole rotor is striden and propped up on support.
Most preferred embodiment:
With reference to accompanying drawing 5, the large compound Fresnel line of capacity high concentration ratio condensing reflection device includes principal reflection device 1, thermal-collecting tube 2 and secondary reflection unit 4; Principal reflection device 1 is that principal reflection mirror forms by a plurality of differential of the arc Fresnel reflection eyeglasses, the center of each fresnel reflecting mirror is provided with transfer 3, and these a plurality of Fresnel reflection eyeglasses are positioned at the top of thermal-collecting tube 2, the distributed architecture that is a kind of bridge-type, this structure comprise horizontal segment and symmetrical centered by this horizontal segment about two radian sections, centered by thermal-collecting tube, in the tangential direction of one of horizontal segment two ends end points, outwards extend with downward angle [alpha] and form described radian section; The center of the principal reflection mirror of the radian section angle [alpha] that extends that distributes satisfies ln (ρ/ρ 0)=θ tg α; When the line of centres of the speculum of the direction of sunlight and principal reflection device and thermal-collecting tube was parallel, this sheet speculum carried out 180 ° upset.Also include a kind of secondary reflection unit 4, it is installed in thermal-collecting tube 1 below.This pair reflection unit is that a plurality of Fresnel reflection eyeglasses form, with fresnel reflecting mirror as subreflector, and being centered close on the same straight line of these a plurality of Fresnel reflection eyeglasses, arc-shaped concave central vertical line points to the thermal-collecting tube center, in the overall structure, the angle of inclination of subreflector sheet is constant, but overall structure rotates with the solar angle degree, and other see the utility model content part in detail.It is identical with embodiment 1 that present embodiment is not stated part.
It is same as the prior art that the utility model is not stated part.

Claims (10)

1.桥式大容量高聚光比复合菲涅尔线聚光反射装置，包括有主反射装置和集热管，其特征在于，主反射装置由复数个以微弧菲涅尔反射镜片为主反射镜组成，每个主反射镜的中心位置设置有转向装置，且该复数个主反射镜片位于集热管的上方，呈一种桥式的分布结构，该结构包括水平段和以该水平段为中心对称的左右两弧度段，以集热管为中心、在水平段两端端点之一的切线方向以向下的角度α向外延展形成所述的弧度段；同时每个菲涅尔反射镜的内凹弧面均面向有阳光入射的方向，当阳光的方向与主反射镜的中心点和集热管的中心连线平行时，该片反射镜进行180°的翻转；还包括有一种副反射装置，其安装在集热管下方，弧形内凹面面向集热管方向。1. The bridge-type large-capacity and high-concentration-ratio composite Fresnel line light-concentrating reflector includes a main reflector and a heat collector. It is characterized in that the main reflector is composed of a plurality of micro-arc Fresnel reflectors as the main reflector. , the central position of each primary reflector is provided with a steering device, and the plurality of primary reflectors are located above the heat collecting tubes, presenting a bridge-like distribution structure, which includes a horizontal section and a center symmetrical to the horizontal section Two arc sections on the left and right, with the heat collecting tube as the center, extend outward at a downward angle α in the direction of the tangent to one of the two ends of the horizontal section to form the arc section; at the same time, the concave arc of each Fresnel reflector The surfaces all face the direction of the incident sunlight. When the direction of the sunlight is parallel to the central point of the main reflector and the center line of the heat collecting tube, the reflector will be flipped 180°; it also includes a secondary reflector, which is installed Below the heat collecting tube, the arc-shaped inner concave surface faces the direction of the heat collecting tube. 2.根据权利要求1所述的桥式大容量高聚光比复合菲涅尔线聚光反射装置，其特征在于，副反射装置的宽度大于主反射装置的水平段长度。2. The bridge-type large-capacity and high-concentration-ratio composite Fresnel line light-condensing reflection device according to claim 1, characterized in that the width of the secondary reflection device is greater than the length of the horizontal section of the main reflection device. 3.根据权利要求1所述的桥式大容量高聚光比复合菲涅尔线聚光反射装置，其特征在于，副反射装置所采用的副反射镜为一种抛物线形聚光反射镜，该副反射镜上设置有驱动转向装置。3. The bridge-type large-capacity high-concentration ratio composite Fresnel line light-condensing reflector according to claim 1 is characterized in that the secondary reflector adopted by the secondary reflector is a parabolic light-condensing reflector, and the secondary reflector adopts a parabolic light-condensing reflector. The reflector is provided with a drive steering device. 4.根据权利要求1所述的桥式大容量高聚光比复合菲涅尔线聚光反射装置，其特征在于，副反射装置为复数个菲涅尔反射镜片组成，且该复数个菲涅尔反射镜的中心位于同一直线上，弧形凹面中心垂直线指向集热管中心。4. The bridge-type large-capacity high-concentration ratio composite Fresnel line light-concentrating reflector according to claim 1, wherein the secondary reflector is composed of a plurality of Fresnel reflectors, and the plurality of Fresnel reflectors The center of the mirror is located on the same straight line, and the vertical line of the arc concave center points to the center of the heat collecting tube. 5.根据权利要求1所述的桥式大容量高聚光比复合菲涅尔线聚光反射装置，其特征在于，弧度段的主反射镜的中心位置所分布延展的角度α满足ln(ρ/ρ0)=θtgα；其中ρ0为集热管中心到水平段端部反射镜Fd中心的距离，ρ为弧度段上的某一反射镜Fh的中点到集热管中心的距离；θ为以集热管中心为顶点、水平段端部反射镜Fd中心为起点向外转到弧度段该某一反射镜Fh中心的角度。5. The bridge-type large-capacity high-concentration ratio composite Fresnel line light-concentrating reflector according to claim 1 is characterized in that, the angle α distributed by the central position of the main reflector in the arc segment satisfies ln(ρ/ρ0 )=θtgα; where ρ0 is the distance from the center of the heat collecting tube to the center of the reflector Fd at the end of the horizontal section, and ρ is the distance from the midpoint of a reflector Fh on the arc section to the center of the heat collecting tube; θ is the distance from the center of the heat collecting tube to The center of the reflector Fd at the end of the apex and the horizontal section is the angle at which the center of the certain reflector Fh of the arc section turns outwards as the starting point. 6.根据权利要求1所述的桥式大容量高聚光比复合菲涅尔线聚光反射装置，其特征在于，主反射装置的水平段两端和集热管中心点形成的角度
Figure FDA00001899119300011
为2倍的α。6. The bridge-type large-capacity high-concentration ratio composite Fresnel line light-concentrating reflector according to claim 1 is characterized in that, the angle formed by the two ends of the horizontal section of the main reflector and the central point of the heat collecting tube
Figure FDA00001899119300011
is 2 times α. 7.根据权利要求1所述的桥式大容量高聚光比复合菲涅尔线聚光反射装置，其特征在于，水平段的主反射镜之间的间距为1/2到
Figure FDA00001899119300012
倍的主反射镜宽度。7. The bridge-type large-capacity high-concentration ratio composite Fresnel line light-concentrating reflection device according to claim 1, wherein the distance between the main reflectors in the horizontal section is 1/2 to
Figure FDA00001899119300012
times the width of the primary mirror. 8.根据权利要求1所述的桥式大容量高聚光比复合菲涅尔线聚光反射装置，其特征在于，在弧度段，主反射镜一半的宽度与该段主反射镜间距的比值小于sin(45°-α/2)。8. The bridge-type large-capacity and high-concentration-ratio composite Fresnel line light-concentrating reflector according to claim 1 is characterized in that, in the arc section, the ratio of half the width of the main reflector to the distance between the main reflectors in this section is less than sin (45°-α/2). 9.根据权利要求1所述的桥式大容量高聚光比复合菲涅尔线聚光反射装置，其特征在于，所述的主反射装置中的菲涅尔反射镜，即主反射镜的转向装置包括有反射镜架、转轴以及支架，反射镜安装在反射镜架上并组成转动体，反射镜架通过转轴旋转支撑在支架上，转轴轴心位于反射镜的反射方向上，而且，该转轴轴心位于反射镜的厚度内；设置一种平衡锤，该平衡锤与转动体连接，并设置在转动体重心与转轴轴心连线的延伸线上。9. The bridge-type large-capacity high-concentration ratio composite Fresnel line light-concentrating reflector according to claim 1, wherein the Fresnel reflector in the main reflector is the turning device of the main reflector It includes a reflector frame, a rotating shaft and a bracket. The reflector is installed on the reflector frame and forms a rotating body. The reflector frame is rotatably supported on the bracket through the rotating shaft. The axis of the rotating shaft is located in the reflection direction of the reflecting mirror. The center is located within the thickness of the reflector; a counterweight is provided, which is connected to the rotating body and arranged on the extension line of the line connecting the center of gravity of the rotating body and the axis of the rotating shaft. 10.根据权利要求1所述的桥式大容量高聚光比复合菲涅尔线聚光反射装置，其特征在于，集热管或者是玻璃真空管，或者光伏发电装置。10. The bridge-type large-capacity and high-concentration-ratio composite Fresnel line light-concentrating reflection device according to claim 1, characterized in that the heat collecting tube is either a glass vacuum tube or a photovoltaic power generation device.
CN201220346960XU 2012-07-17 2012-07-17 Bridge-type composite Fresnel linear condensation and reflection unit with high capacity and a high condensation ratio Expired - Lifetime CN202792603U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102748875A (en) * 2012-07-17 2012-10-24 福建省电力有限公司电力科学研究院 Bridge type large-capacity high-concentrating-ratio composite Fresnel line concentrating and reflecting device
GB2555572A (en) * 2016-10-19 2018-05-09 Amarjit Riyait Solar concentrator, solar receiver and thermal storage
CN114739134A (en) * 2022-04-11 2022-07-12 华东交通大学 A drying coupling energy supply system for medicinal materials based on solar spectrum frequency division
FR3140670A1 (en) * 2022-10-11 2024-04-12 Commissariat A L'energie Atomique Et Aux Energies Alternatives Solar collector comprising a plurality of fan-shaped mirrors

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102748875A (en) * 2012-07-17 2012-10-24 福建省电力有限公司电力科学研究院 Bridge type large-capacity high-concentrating-ratio composite Fresnel line concentrating and reflecting device
GB2555572A (en) * 2016-10-19 2018-05-09 Amarjit Riyait Solar concentrator, solar receiver and thermal storage
GB2555572B (en) * 2016-10-19 2021-03-10 Storenergy D O O Solar concentrator, solar receiver and thermal storage
US10976113B2 (en) 2016-10-19 2021-04-13 Storenergy Holdings, Ltd. Solar concentrator, solar receiver and thermal storage
CN114739134A (en) * 2022-04-11 2022-07-12 华东交通大学 A drying coupling energy supply system for medicinal materials based on solar spectrum frequency division
FR3140670A1 (en) * 2022-10-11 2024-04-12 Commissariat A L'energie Atomique Et Aux Energies Alternatives Solar collector comprising a plurality of fan-shaped mirrors
EP4354043A1 (en) * 2022-10-11 2024-04-17 Commissariat à l'énergie atomique et aux énergies alternatives Solar collector with a plurality of fan-out mirrors

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