CN202583585U - High-multiplying linear Fresnel condenser - Google Patents
High-multiplying linear Fresnel condenser Download PDFInfo
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- CN202583585U CN202583585U CN2012200769674U CN201220076967U CN202583585U CN 202583585 U CN202583585 U CN 202583585U CN 2012200769674 U CN2012200769674 U CN 2012200769674U CN 201220076967 U CN201220076967 U CN 201220076967U CN 202583585 U CN202583585 U CN 202583585U
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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
- Y02E10/44—Heat exchange systems
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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
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model discloses a high-multiplying linear Fresnel condenser, which comprises reflector fields and receiving devices. The condenser is characterized in that each reflector field comprises at least four groups of one-dimensional linear gathering reflector strips; that each linear receiving device is arranged in parallel with the reflector strips; that the height of each receiving device is more than half of the width of the reflector field; and that a secondary optics condenser is arranged inside the receiving device. According to the utility model, low-cost high-multiplying condensation can be acquired, the low condensation efficiency which is caused by extinction, low tolerance rate and severe shielding is overcome, and the problem that the maintenance of the device is inconvenient is simultaneously solved.
Description
Technical field
The utility model relates to a kind of solar-energy light collector, particularly relates to a kind of high magnification linear Fresnel beam condensing unit.
Background technology
Sun power is as the energy of a kind of cleaning, environmental protection, and people are devoted to the development and utilization to it always for a long time.Particularly in recent years; Because oil price constantly soaring and to the raising of environmental protection requirement; And the anthropogenic carbon dioxide emissions quantitative limitation, various countries have carried out the research that sun power utilizes the aspect harder, particularly to how to obtain more efficiently and utilize sun power to drop into more energy.
Solar light-heat power-generation is one of the most economic means that realize high-power generating, alternative conventional energy resources, and the advantage shortcoming is very obvious separately for three kinds of modes of solar light-heat power-generation, as: tower efficient is high, but disposable having high input; The slot type cost is low, but tower relatively low with dish formula efficient; But dish formula unit standardized production, but scale is difficult to do greatly.
Condensation photovoltaic (CPV) is meant and directly converts the sunshine after converging the technology of electric energy into through the photovoltaic cell of high transformation efficiency, and condensation photovoltaic also is a kind of selection that realizes the low-cost solar generating, and the Fresnel array approaches also is an one of which in the optically focused mode.
The linear fresnel solar beam condensing unit mainly comprises linear Fresnel mirror bar system and receiving trap; This linear Fresnel mirror bar system comprises linear reflective mirror mirror bar field; This linear reflective mirror mirror bar field is made up of a plurality of mirror bars that laterally arrange side by side; These mirror bars can drive to follow the tracks of sun's motion through tracking means simultaneously, continue to guarantee incident light is reflexed to receiving trap.The sunshine of these mirror bar reflections is concentrated directive to be arranged in the receiving trap of these mirror bar tops, is heat energy or electric energy through this receiving trap with conversion of solar energy.A common receiving trap can be arranged between a plurality of mirror bars, so that receive the sunshine of these a plurality of mirror bar reflections.
In the present linear fresnel solar condenser system, horizontal linear ground, Fresnel mirror field is arranged, presses close to fundamental plane such as ground, brings some inconvenient factors, for example 1, the contamination by dust of ground proximity is many usually; 2, the mirror bar face dust of Fresnel Jing Chang thickens behind the certain hour, has seriously reduced the reflection potential of mirror bar, needs more short-period regular cleaning; While, on ground, operating personnel also were inconvenient to clean, and have only the mirror bar is turned to the upright position because of the tight arranged of Fresnel Jing Chang; Get into the slit of operating personnel between the mirror bar and operate; So the width of mirror bar must be very wide, and for example 2 meters, this size is bigger; Desirable strength improves, and cost of manufacture is difficult to descend; 3, the mirror bar is generally the design of flat reflective mirror, and in theory, the width of flat reflective mirror mirror bar is close with the width of receiver, and in order to improve the tolerance property of following the tracks of angle, the acceptance width of receiving trap is greater than the width of flat reflective mirror mirror bar; For symmetrical arrangement and the blade-end loss effect still less (light that converges deflects away from the axially too much of receptacle) that obtains Fresnel Jing Chang; Present Jing Chang generally adopts north and south to arrange; So need wider range of following the tracks of, for example positive and negative 80 degree, so the mirror field tolerance rate very little (or the width of required receiving trap is very wide) of the mirror bar of mirror field edge particularly; For obtaining higher light concentrating times and better tolerance rate and reducing cost; Mirror field width is very wide, and the rotating shaft number of mirror bar is numerous, and cost is high, poor reliability; And the height that exceeds the Jing Chang plane that receiving trap is arranged is lower than the half the of this arrangement of mirrors field width, is generally about 1/4 of this arrangement of mirrors field width; 4, mirror field horizontal linear is arranged; The mirror bar is in the process of following the tracks of; The shading rate between the edge reflections mirror mirror bar of every group of mirror field very serious (light that back mirror mirror bar reflects has been blocked at the back of front mirror mirror bar) has particularly reduced the light gathering efficiency of mirror bar; 5, the mirror field directly is arranged on the ground, and floor area is bigger, and land utilization ratio is not high, has wasted land resource; 6, the ubiquity light concentrating times lower (during the sunshine vertical incidence mirror bar receive light overall width and absorption tube width or diameter ratio be generally 30-60 doubly about) the low problem of the thermal efficiency that causes.
Therefore how to improve light concentrating times, light gathering efficiency and the reliability of the catoptron field of Fresnel, overcome maintenance and safeguard inconvenience, reducing the construction costs and improve problem such as utilization of area rate, become the key subjects of linear Fresnel optically focused technology.
Summary of the invention
The purpose of the utility model mainly is to address the problem: 1, the low low problem of the thermal efficiency, thermal parameter that causes of light concentrating times; 2, cause that the not high air-borne dust of beam condensing unit light gathering efficiency pollutes, the tolerance rate is low and the problem of serious shielding; 3, the inconvenient problem of beam condensing unit maintenance and maintenance; 4, the beam condensing unit floor area is big, the problem that land utilization ratio is not high; 5, some other influences cost and reliability problems.
For addressing the above problem, the utility model provides a kind of high magnification linear Fresnel beam condensing unit, comprises mirror field, receiving trap, it is characterized in that: the mirror field comprises that at least 4 group one-dimensional linears converge the mirror bar; Linear receiving trap is parallel to the mirror bar to be arranged, the height value of receiving trap surpasses half the (height value of receiving trap is defined as the average height difference of the mirror bar axis that receiving trap position and multiaxis be arranged in parallel) of mirror field width value; Be furnished with the secondary optics beam condensing unit in the receiving trap.
In further embodiment; The mirror bar that converges of the one-dimensional linear of said mirror field is that cylinder converges the mirror bar; Mirror bar group number is 4 groups～10 groups; Each mirror bar has identical rotational angle in the tracing process of mirror field, reduces rotating shaft quantity, reduces cost, improves reliability and tracking accuracy.
In further embodiment, the height value of said receiving trap is 0.55～0.85 times of mirror field width value.
Preferably, the curved layout in internal reflector mirror bar rotating shaft core position, cross section perpendicular to linear receiving trap of said mirror field is to obtain less shading rate.
Preferably, in the mirror field of each unit, the rotating shaft core position of said mirror bar is the matrix arrangement of curves of symmetry in the cross section perpendicular to linear receiving trap.
In further embodiment; The width of said mirror bar is inconsistent; Said mirror bar present position is more near the center under the receiving trap; The width of the mirror bar that it is corresponding is wide more, so that each mirror bar obtains close tolerance rate, and reduces mirror bar quantity.
Preferably, the rotating shaft core position of said mirror bar in cross section, be perpendicular to linear receiving trap the symmetry the matrix curve fitting be two sections straight lines; Two sections straight lines straight line that to be formed angle be symmetrically distributed less than 180 ° indent, about use link-type to organize interlock respectively more, simplify structure, reduce cost.
In the embodiment further, the lower bottom part in the mirror field is provided with the Maintenance and Repair space, and personnel and equipment near equipment mechanisms such as reflector group, carry out work such as Installation and Debugging, cleaning maintenance through this space.
In further embodiment, said Fresnel beam condensing unit can be applied to the photovoltaic field, and said receiving trap comprises the solar battery group of linear arrangement.
In this application mode; The secondary optics beam condensing unit that is provided with on the parallel direction of the solar battery group of linear arrangement property along the line focal line is compound parabolic condenser arragement (CPC); Light to the focal line direction carries out certain converging, and forms the accurate two-dimentional optically focused that is interrupted of arranging along the focal line direction and receives.
In further embodiment, when said Fresnel beam condensing unit can be applied to the photo-thermal field, said receiving trap comprised the heat collector of linear arrangement.
In further embodiment, said receiving trap is a U type heat collector, realizes reducing the main length in the mirror field from same extreme direction input and output, reduces the whole cost of beam condensing unit; And temperature-sensing valve is installed in each U type heat collector exit, and through detecting the temperature of outlet medium, the size of Control Flow keeps the heat transfer medium of equilibrium temperature to export and security of operation.
Preferably, said linear heat collector comprises glass bushing, internal layer absorption tube and secondary optics beam condensing unit, and wherein the secondary optics beam condensing unit is embodied as compound parabolic condenser arragement (CPC).
In further embodiment, the space that said glass bushing and internal layer absorption tube form keeps vacuum state, with convection heat losses who reduces heat collector inside and the absorber coatings of protecting the internal layer absorption tube, increases the service life.
Preferably, through bleeding continuously or intermittently, keep the dynamic vacuum state in the space that said glass bushing and internal layer absorption tube form.
In further embodiment, the temperature of the heat transfer medium output terminal that said internal layer endothermic tube is inner is higher than 320 ℃, is lower than 550 ℃.
Preferably, the temperature of the heat transfer medium output terminal that said internal layer endothermic tube is inner is higher than 350 ℃, is lower than 450 ℃; When obtaining the optically focused multiplying power of Fresnel of high power, obtain heat collector receiving efficiency efficiently, reduce because of pursuing the high radiation loss problem that high-temperature brings.
In further embodiment, the lower bottom part in the mirror field is provided with the Maintenance and Repair space, and the said Maintenance and Repair space length of part floor level is more than or equal to 1.5 meters at least.
In further embodiment, said Maintenance and Repair space can fully utilize, and for example, can be used as parking lot or grain, vegetables, flower and plant base or building roof or the like.
Description of drawings
Below with reference to accompanying drawings the specific embodiments of the utility model is explained in more detail, in the accompanying drawings:
Fig. 1-the 1st, the arranged in arrays synoptic diagram of the high magnification linear Fresnel beam condensing unit of the utility model;
Fig. 1-2 is the incident ray angle synoptic diagram of the high magnification linear Fresnel beam condensing unit of the utility model;
Fig. 2 is the high magnification linear Fresnel beam condensing unit integral arrangement synoptic diagram of a kind of embodiment of the utility model;
Fig. 3 is that the mirror field structure of a kind of embodiment of the utility model is arranged synoptic diagram;
Fig. 4 is the cross-sectional structure synoptic diagram of the single mirror bar of the utility model;
Fig. 5 is that the receiving trap of the utility model is the structural arrangement synoptic diagram of photovoltaic solar cell group; Fig. 6 is the receiving trap structural representation of the embodiment of the utility model;
Fig. 7 is the receiving trap cross-sectional structure synoptic diagram of the embodiment of the utility model.
Embodiment
Fig. 1-the 1st, the arranged in arrays synoptic diagram of the high magnification linear Fresnel beam condensing unit of the utility model; Conventional fresnel reflecting mirror mirror field 2 is provided with fundamental plane along continuous straight runs straight line; In order to obtain some more excellent performances; It is as shown in Figure 1 that this beam condensing unit is arranged, the array of high magnification linear Fresnel beam condensing unit arranged by a plurality of Fresnel beam condensing unit cell arrays, and for example 101,102 and 103; The one-piece construction 1 of each Fresnel beam condensing unit unit mainly comprises high mirror field of arranging 2 of frame and receiving trap 3; What wherein mirror field 2 comprised at least 4 group one-dimensional linears converges the mirror bar; Receiving trap 3 parallel mirror mirror bars arrange, the height value of receiving trap 3 surpasses half the (height value of receiving trap is defined as average height poor of the mirror bar axis that receiving trap position and multiaxis be arranged in parallel) of mirror field width value; Be furnished with the secondary optics beam condensing unit in the receiving trap 3.At present common conventional linear Fresnel condenser system receiving trap height is generally below mirror field width half the; Common is about 1/4; Its light angle that converges to receiving trap is bigger, is generally 95 ° to 125 °, and it is high that want the receiving trap position of the receiving trap 3 more conventional Fresnel condenser systems of the utility model device; For example the height value of receiving trap is 0.55～0.85 times of mirror field width value; Be preferably 0.6～0.8 times of the two ratio, therefore converge the incident ray angle that is incident to receiving trap less (seeing Fig. 1-2), for example 60 °～80 °; Be that the cylinder with one dimension aggregate capabilities converges the mirror bar because constitute each mirror bar of solar energy mirror field again; And its light image that converges that arrives the receiving trap position is owed the focusing cycle and is gradually changed from crossing to focus on the variation of angle of incident light; But when the receiving trap height is in 0.55～0.85 times of width; The catoptron bar that converges of same widths has less relatively average light image width degree, can obtain the higher relatively optically focused multiplying power (each bar cylinder converges the width sum of catoptron and the ratio of the light width that converges at the receiving trap receiving port) that once converges; Meanwhile; The formed light aggregate capabilities of secondary optics beam condensing unit of arranging in the receiving trap 3 also has much relations with the angle of injecting light; The incident ray angle is more little; The secondary optics beam condensing unit to converge the optically focused multiplying power high more, particularly angle less than 90 degree after, its aggregate capabilities rises more; Overall linear Fresnel beam condensing unit always converge the product that the optically focused multiplying power is the secondary condensation multiplying power of optically focused multiplying power and secondary optics beam condensing unit, so the utility model can be implemented in and realizes the higher multiple that converges when using less mirror bar group number.For example adopt very economic mirror bar group number, for example 4 groups～6 groups, the sunshine of accomplishing the optically focused multiplying power more than at least 100 converges; When the number of axle is 6～10 groups; The highest multiple that converges can be to more than 180～200 times, and can also keep higher tracking angle tolerance, and is reliable and practical; In at present comparatively popular Compact Linear Fresnel Reflector (CLFR) technology; Generally adopt and have reflector group number more than 12 groups; Every group of mirror bar correspondence has independent mirror bar turning axle and driving, and expensive and complicated, tracking accuracy is wayward; Also cause the shading rate between the adjacent mirror mirror bar to increase in addition, or for obtaining the decline that less shading rate brings the land area utilization rate; And bring the increase of too much installation, maintenance, repair, operating cost under the multiaxis pattern, common light optically focused multiplying power that however should technology is not very high (generally at 30～60 times) still, and macroeconomic property is obviously not enough; The utility model is arranged on the Maintenance and Repair space lower bottom part of mirror field; Personnel and equipment through this space near equipment mechanisms such as reflector group, conveniently carry out Installation and Debugging, work such as cleaning maintenance etc. (total optically focused multiplying power of describing in the literary composition be defined as the light vertical incidence time each Fresnel beam condensing unit unit the mirror bar receive the ratio of absorption tube diameter or the photovoltaic cell of light overall width and the heat collector internal placement width on axial).
The mirror bar integral level of general linear Fresnel catoptron field is arranged on the ground, and for the rate of blocking for a short time between the mutual mirror bar, the distance between the adjacent mirror is bigger, and the land area utilization rate of solar energy mirror field is lower.The mirror field 2 of the utility model comprises many mirror bars that are arranged in parallel 4 compositions; In the mirror field 2 of each unit; The rotating shaft core position of said mirror bar is the matrix arrangement of curves of symmetry in the cross section perpendicular to linear receiving trap, realizing that the mirror compact arranged while of bar can reduce or avoid fully mutual eclipsing loss between a plurality of mirror bars 4 that mirror field 2 local arrays arrange to obtain less shading rate; In order to simplify the tracking drive pattern, the rotating shaft core position of mirror bar is symmetry in the cross section perpendicular to linear receiving trap matrix curve fitting is two sections straight lines; Two sections straight lines straight line that to be formed angle be symmetrically distributed less than 180 ° indent, about use link-type to organize interlock respectively more, simplify structure, reduce cost.Shown in Fig. 1-1; With the mirror bar 4 on the former curve homonymy that is arranged in spill, for example mirror bar 4-1, mirror bar 4-3 and mirror bar 4-5, match is arranged on same the straight line; And be furnished with interlock connecting rod 11 under the every mirror bar 4; Multiple reflection mirror mirror bar 4 interlocks to realize the connecting rod mode simplify structure, reduce cost.For improving the physical strength of mirror field 2, in 2 bottoms, mirror field arch support structures 12 is set, be used for supporting reflex mirror mirror field 2.The width of a plurality of mirror bars 4 is inconsistent; Wherein the width of the mirror bar 4-1 that arranges than both sides of the mirror bar 4-5 that arranges of 2 centre positions, mirror field and mirror bar 4-3 is wide; The width of mirror bar 4 that is every group of mirror field 2 internal placement is relevant with the position in it is arranged in the mirror field; The present position is more near the center under the receiving trap 3; The width of the mirror bar 4 that it is corresponding is wide more, when making each mirror bar 4 obtain close optics tolerance ability, reduces mirror bar quantity; The width of mirror bar 4 should not be made excessive, when saving material and space, also can improve the catoptron precision of mirror bar 4; Because of the face type of the design's mirror bar 4 is a cylinder, have certain aggregate capabilities, certain layout of mirror field 2 simultaneously, for example north and south is arranged; Wider range of required tracking angle, and in the process that can rotate at the turning axle around self, exist and owe burnt and overfocus phenomenon; After guaranteeing certain high tolerance angle, the opening of the width of mirror bar 4 and receiving trap 3 is suitable, and is perhaps wideer; Also can difference sunshine constantly be reflexed in the identical space, and also have enough tolerance angles, so can obtain higher light concentrating times reliably; Obtain better heat transfer medium temperature, reduce the desirable strength of device, reduce construction cost; Mirror field 2 is set to the mirror bar of flat reflective mirror mirror bar and special cylinder in the practical operation, when obtaining preferably mirror bar optically focused, can control effectively and reduces cost; Focal line location arrangements receiving trap 3 in mirror field 2.
This Fresnel beam condensing unit can be applied to the photo-thermal field, and receiving trap 3 is linear heat collector, and shown in Fig. 1-1, receiving trap 3 comprises single being arranged in parallel in the heat collector of mirror field; For obtaining higher optically focused multiplying power, mirror field 2 comprises at least 6 group reflection mirror arrays; Preferably, the height value of receiving trap is 0.6～0.8 times of mirror field width value, and the angle that corresponding catoptron two ends limit reflection ray and receiver position form is 64 °～80 °.A concrete instance does; Single-row beam condensing unit unit opening is 15m, and heat collector is arranged in the 10.5m height, sunshine is converged at the absorption tube surface of the heat collector internal placement that comprises secondary optics according to the parallel multiple row mirror bar of arranging of above-mentioned arrangement; Guarantee the mirror bar possess broad tracking angle tolerance rate in; Absorption tube can also obtain 100～200 times optically focused multiplying power, is preferably 120～150 times of optically focused multiplying powers; In the concrete instance; The absorption tube external diameter is 100mm in the beam condensing unit unit; The optically focused multiplying power is 120 times, and the output terminal temperature of inner heat transfer medium can be controlled between 350 ℃～550 ℃, preferably; The temperature of the heat transfer medium output terminal that said internal layer endothermic tube is inner is higher than 350 ℃, is lower than 450 ℃; When obtaining the Fresnel optically focused multiplying power of high power, obtain heat collector receiving efficiency efficiently, reduce because of pursuing the high radiation loss problem that high-temperature brings.
Lower bottom part in the mirror field is provided with the Maintenance and Repair space, at least the said Maintenance and Repair of part space 10 apart from floor level more than or equal to 1.5 meters; With make things convenient for the staff below the mirror field or the back lower place to mirror field 2 inspection and maintenances, when from the below minute surface being carried out cleaning, mirror bar angular setting is for erectting or the deflection below.So design can also be played the effect of moisture proof and dust protection with mirror field 2 relatively away from ground in addition; To a certain degree reduce the extinction effect of dust horizon to sunray; Can also be designed to parking lot or grain, flower planting base under the Maintenance and Repair space 10, and this Fresnel beam condensing unit can also be arranged in building roof or the like, make full use of the valuable land resource of growing tension.
This Fresnel beam condensing unit also can be applied to the photovoltaic field; This moment, receiving trap 3 comprised the solar battery group of linear arrangement; The phototransformation that reflection is converged becomes electric energy output, on the parallel direction of the solar battery group of linear arrangement property along the line focal line compound parabolic condenser arragement (CPC) can be set further, need in this dimension, not carry out active tracking; Can carry out certain converging to the light of focal line direction, form the accurate two-dimentional optically focused that is interrupted of arranging and receive along the focal line direction.
The matrix arrangement of curves design in the design in the Maintenance and Repair space 10 of the liftoff certain altitude of this Fresnel beam condensing unit, 2 each axle center, mirror field, the cylinder design of mirror bar 4; Than traditional Fresnel mirror field horizontal linear be arranged on the ground, have lot of advantages: for example, the dust disturbance that has reduced ground proximity is many; And the drawback that moisture is heavier; Sunray is avoided dust horizon direct incident Fresnel Jing Chang and receiving trap, reduces extinction effect, improves light gathering efficiency; Avoid dust horizon, have the longer cleaning frequency, operating personnel are easy and convenient when regularly cleaning, and operating environment is superior, and 2 beneath cool place districts patrol and examine and maintenance clean easily in the mirror field; Mirror bar 4 width do not get between the mirror bar for the cleaning personnel and design very wide, and therefore required cost of manufacture descends; Mirror bar 4 is arranged to the cylinder aggregation infrastructure, than flat reflective mirror mirror bar, has certain aggregate capabilities; Required when following the tracks of angle on a large scale; Only need the mirror bar to accomplish to owe burnt to get final product with overfocus, the width of mirror bar 4 can be close with the width of receiving trap 3, in addition wide a lot; The range of size broad has higher light concentrating times and better tolerance rate.
Fig. 1-2 is the incident ray angle synoptic diagram of the high magnification linear Fresnel beam condensing unit of the utility model; Shown in Fig. 1-2, the rotating shaft core position of mirror bar is the matrix arrangement of curves of symmetry in the cross section perpendicular to linear receiving trap, and the average height of each catoptron bar shaft core position is a mirror bar height, like line D; The height value of receiving trap is average height poor of the mirror bar axis that is arranged in parallel of receiving trap position and multiaxis, like line E; Mirror field width is the distance between the outward flange of outermost both ends catoptron bar 4-1 and mirror bar 4-10 of this unit, mirror field, like line F; The incident ray angle is formed by reflection ray and the receiving trap that the outward flange of the outermost both ends mirror bar 4-1 of this unit, mirror field and mirror bar 4-10 is incident to receiving trap, like angle [alpha], is preferably 60 °～80 °; The height value of the receiving trap of the utility model linear Fresnel optically focused electro-optical device is 0.55～0.85 times of mirror field width value, and preferably the two ratio is 0.6～0.8 times; Total optically focused multiplying power be defined as the light vertical incidence time each Fresnel beam condensing unit unit the ratio of mirror bar absorption tube diameter or the photovoltaic cell width on axially that receives light overall width and heat collector internal placement.
Fig. 2 is the high magnification linear Fresnel beam condensing unit integral arrangement synoptic diagram of a kind of embodiment of the utility model.As shown in Figure 2, Fresnel beam condensing unit one-piece construction 1 mainly comprises mirror field 2 and receiving trap 3; Mirror field 2 is made up of the mirror bar 4 that is arranged in parallel; A plurality of mirror bars 4 are rule arranged in arrays on mirror bar 4-1, mirror bar 4-3 and the mirror bar 4-5 east-west direction for example; The face type of mirror bar 4 is a cylinder; And can be around turning axle 5 rotations of self, different sunshines constantly reflex in the identical space; A plurality of mirror bar 4-1, mirror bar 4-3 and mirror bar 4-5 can converge at the sunshine reflection in the identical space, form common focal line; Focal line location arrangements receiving trap 3 in mirror field 2, the U type heat collector 6 that receiving trap 3 is arranged by a plurality of adjacent parallel is formed.
Fig. 3 is that the mirror field structure of a kind of embodiment of the utility model is arranged synoptic diagram.Mirror as shown in Figure 3 field 2 comprises a plurality of mirror bars; For example mirror bar 4-1, mirror bar 4-3, mirror bar 4-5, mirror bar 4-8, mirror bar 4-10 and mirror bar 4-12; According to the postpone of rule cloth sunray is converged near receiving trap 3 (the convergent point position does not indicate among the figure), mirror bar 4-1 as shown in Figure 3; Mirror bar 4-3; When residing position was the incident of sunshine certain angle when the residing position of mirror bar 4-5 was sun light positive vertical incidence, when the mirror bar of three diverse locations is accomplished the reflection task, the location status that is in respectively; In the practical operation, the mirror bar correspondence of any diverse location of synchronization is with sunray, and it is all inequality that near the residing location status of light receiving trap 3 converged in completion; As shown in Figure 3; The width of the mirror bar in the mirror field 2 is along with the position different in width is inconsistent; The wide degree of mirror the closer to the mirror bar of receiving trap 3 arranged just beneath is wide more, and for example, mirror bar 4-5 width is greater than the width of mirror bar 4-1; For the unified of connecting rod mode of realizing a plurality of mirror bars links, the mirror field of arranging according to curve A is originally fitted to two straight lines, straight line B and straight line C divide two groups of connecting rod 11 unified tracking independently.The off working state of mirror field 2 has been illustrated on Fig. 3 the right; Promptly clean state, unclean when the reflecting surface of mirror field 2, and certain sky is suitable follows the tracks of when obtaining sun power; Open cleaning model; With the mirror bar in the mirror field 2 for example mirror bar 4-8, mirror bar 4-10 and mirror bar 4-12, changing its position is approximately perpendicular state, and it is cleaned.
Fig. 4 is the cross-sectional structure synoptic diagram of the single mirror bar of the utility model.Fig. 4 has illustrated the part-structure of mirror bar 4 and receiving trap 3; The mirror surface of mirror bar 4 is a cylinder among the figure, and has illustrated-75 °, and three kinds of sunray incidence reflection mirror mirror bars 4 of 0,75 ° are corresponding to three different mirror-state; Be respectively I, II, III; Mirror bar 4 is around turning axle 5 rotations of self, and the face type of mirror bar 4 is a cylinder, has certain aggregate capabilities; The North and South direction of mirror field 2 is arranged simultaneously, wider range of required tracking angle, and in the process that can rotate at the turning axle 5 around self; Exist and owe burnt and overfocus phenomenon, after guaranteeing certain high tolerance angle, the opening of the width of mirror bar and receiving trap 3 is suitable; Even can be wideer, also can difference sunshine constantly be reflexed in the space of receiving trap 3, so can obtain higher light concentrating times; Obtain better heat transfer medium temperature, reduce the desirable strength of device, reduce construction cost.
Fig. 5 is that the receiving trap of the utility model is the structural arrangement synoptic diagram of photovoltaic solar cell group.As shown in Figure 5; The structure of describing for ease the photovoltaic solar cell group rotates to be positive signal; Solar battery group is made up of a plurality of photovoltaic cells 15 that are connected into linear arrangement; Be arranged on the linear focal line position of Fresnel solar energy according to acquisition means; Two kinds of compound parabolic condenser arragements of the solar battery group periphery of linear arrangement (CPC) 9 are respectively that property focal line parallel direction along the line is provided with and compound parabolic condenser arragement (CPC) 9-1 of array, and the light of linear focal line vertical direction is carried out certain converging; The vertical direction (radially) of property focal line along the line goes up compound parabolic condenser arragement (CPC) 9-2 of setting and property focal line parallel direction array along the line; After sunray is incident to compound parabolic condenser arragement (CPC) 9-2; Be arranged in compound parabolic condenser arragement (CPC) 9 bottom photovoltaic cells 15 through reflexing to; So can realize increasing the tolerance performance on the linear focal line vertical direction; Can reduce simultaneously the number that on linear focal line parallel direction, receives photovoltaic cell, improve light concentrating times and utilization ratio, and the accurate two-dimentional optically focused that is interrupted that formation is arranged along the focal line direction receives; A plurality of compound parabolic condenser arragements (CPC) aperture position can be provided with the thin glass 16 of high permeability and carry out capping; Form the confined space cavity with photovoltaic cell 15; The reflectance coating of protection compound parabolic condenser arragement (CPC) 9 guarantees its service efficiency and improves its serviceable life.
Fig. 6 is the receiving trap structural representation of the embodiment of the utility model.As shown in Figure 6, receiving trap 3 is linear collector structure, comprises glass bushing 7, internal layer absorption tube 8 and secondary optics condenser, and the secondary optics condenser for example is a compound parabolic condenser arragement (CPC) 9.In service adjacent heat collector implementing can be interconnected, and the heat collector that forms the U type is whole, realize importing and exporting at same end, and the heat collector of each U type is provided with temperature-sensing valve 14, and stable and reliable operation realizes simple; Detect outlet temperature through temperature-sensing valve 14,, keep the heat transfer medium output and the security of operation of certain steady temperature through the size of temperature Control Flow; Internal layer absorption tube 8 inside of U type heat collector are heat transfer medium; Internal layer absorption tube 8 with good absorber coatings is arranged in the glass bushing 7; The inner space that both form keeps vacuum state, or through bleeding continuously or intermittently, keeps the dynamic vacuum state; With the inner convection heat losses of the heat collector that reduces the U type and the absorber coatings of protection internal layer absorption tube 8, increase the service life; In order to improve the receiving ability of sunray; Increase receiving trap 3 tolerance property, obtain higher optically focused multiplying power and the better homogeneity that receives of light; Internal placement compound parabolic condenser arragement (CPC) 9 at collector arrangement; When improving the optical concentration multiplying power, play the samming effect of being heated of even internal layer endothermic tube tube wall.
Fig. 7 is the receiving trap cross-sectional structure synoptic diagram of the embodiment of the utility model; This receiving trap is as shown in Figure 7, comprises glass bushing 7, compound parabolic condenser arragement (CPC) 9 and internal layer absorption tube 8; Compound parabolic condenser arragement (CPC) 9 is arranged in parallel up and down in glass bushing 7 inside with absorption tube 8; Wherein absorption tube 8 is absorption tube independently, implements end input and exports the heat transfer medium pattern with the other end.
Obviously, under the prerequisite of true spirit that does not depart from the utility model and scope, the utility model described here can have many variations.Therefore, the change that all it will be apparent to those skilled in the art that all should be included within the scope that these claims contain.The utility model scope required for protection is only limited described claims.
Claims (13)
1. a high magnification linear Fresnel beam condensing unit comprises mirror field, receiving trap, it is characterized in that: mirror field (2) comprise that at least 4 group one-dimensional linears converge mirror bar (4); Linear receiving trap (3) is parallel to mirror bar (4) to be arranged, the height value of receiving trap (3) surpasses the half the of mirror field width value; Be furnished with the secondary optics beam condensing unit in the receiving trap.
2. a kind of high magnification linear Fresnel beam condensing unit according to claim 1 is characterized in that: the mirror bar (4) that converges of the one-dimensional linear of said mirror field (2) converges the mirror bar for cylinder, and mirror bar group number is 4 groups ~ 10 groups.
3. a kind of high magnification linear Fresnel beam condensing unit according to claim 1 is characterized in that: the height value of said receiving trap (3) is 0.55 ~ 0.85 times of mirror field width value.
4. a kind of high magnification linear Fresnel beam condensing unit according to claim 1 is characterized in that: the rotating shaft core position of said mirror bar (4) is the matrix arrangement of curves of symmetry in the cross section perpendicular to linear receiving trap.
5. a kind of high magnification linear Fresnel beam condensing unit according to claim 4 is characterized in that: the rotating shaft core position of said mirror bar (4) is symmetry in the cross section perpendicular to linear receiving trap (2) matrix curve fitting is two sections straight lines.
6. a kind of high magnification linear Fresnel beam condensing unit according to claim 1; It is characterized in that: said mirror bar (4) present position is more near the center under the receiving trap (3), and the width of the mirror bar (4) that it is corresponding is wide more.
7. a kind of high magnification linear Fresnel beam condensing unit according to claim 1, it is characterized in that: said receiving trap (3) comprises the heat collector of linear arrangement.
8. a kind of high magnification linear Fresnel beam condensing unit according to claim 7 is characterized in that: said receiving trap (3) is a U type heat collector (6).
9. a kind of high magnification linear Fresnel beam condensing unit according to claim 7, it is characterized in that: said linear heat collector comprises glass bushing (7), internal layer absorption tube (8) and secondary optics beam condensing unit.
10. a kind of high magnification linear Fresnel beam condensing unit according to claim 9 is characterized in that: the space that said glass bushing (7) and internal layer absorption tube (8) form keeps vacuum state.
11. a kind of high magnification linear Fresnel beam condensing unit according to claim 10 is characterized in that: through bleeding continuously or intermittently, keep the dynamic vacuum state in the space that said glass bushing (7) and internal layer absorption tube (8) form.
12. a kind of high magnification linear Fresnel beam condensing unit according to claim 1, it is characterized in that: the lower bottom part in the mirror field is provided with the Maintenance and Repair space, at least the said Maintenance and Repair of part space (10) apart from floor level more than or equal to 1.5 meters.
13. a kind of high magnification linear Fresnel beam condensing unit according to claim 1, it is characterized in that: said receiving trap (3) comprises the solar battery group of linear arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200769674U CN202583585U (en) | 2012-03-02 | 2012-03-02 | High-multiplying linear Fresnel condenser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200769674U CN202583585U (en) | 2012-03-02 | 2012-03-02 | High-multiplying linear Fresnel condenser |
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| CN202583585U true CN202583585U (en) | 2012-12-05 |
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| CN2012200769674U Expired - Lifetime CN202583585U (en) | 2012-03-02 | 2012-03-02 | High-multiplying linear Fresnel condenser |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293653A (en) * | 2012-03-02 | 2013-09-11 | 北京兆阳能源技术有限公司 | High-magnification linear Fresnel light gathering device |
| CN103997286A (en) * | 2014-05-09 | 2014-08-20 | 桂林凯创光伏科技有限公司 | Concentrating photovoltaic system based on reflection of multiple strip-shaped plane mirrors and with automatic sun tracking function |
| CN105674588A (en) * | 2016-04-05 | 2016-06-15 | 上海晶电新能源有限公司 | Multi-secondary reflection tower-confocal solar photothermal mirror field system |
| CN105698402A (en) * | 2016-01-27 | 2016-06-22 | 广东工业大学 | Solar line focusing Fresnel medium-high-temperature heat utilizing system |
-
2012
- 2012-03-02 CN CN2012200769674U patent/CN202583585U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293653A (en) * | 2012-03-02 | 2013-09-11 | 北京兆阳能源技术有限公司 | High-magnification linear Fresnel light gathering device |
| CN103293653B (en) * | 2012-03-02 | 2016-01-06 | 北京兆阳光热技术有限公司 | A kind of high magnification linear Fresnel beam condensing unit |
| US10082318B2 (en) | 2012-03-02 | 2018-09-25 | Beijing Terasolar Energy Technologies Co., Ltd. | Linear fresnel light concentrating device with high multiplying power |
| CN103997286A (en) * | 2014-05-09 | 2014-08-20 | 桂林凯创光伏科技有限公司 | Concentrating photovoltaic system based on reflection of multiple strip-shaped plane mirrors and with automatic sun tracking function |
| CN105698402A (en) * | 2016-01-27 | 2016-06-22 | 广东工业大学 | Solar line focusing Fresnel medium-high-temperature heat utilizing system |
| CN105674588A (en) * | 2016-04-05 | 2016-06-15 | 上海晶电新能源有限公司 | Multi-secondary reflection tower-confocal solar photothermal mirror field system |
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Owner name: BEIJING TERASOLAR PHOTOTHERMAL TECHNOLOGIES CO., L Free format text: FORMER OWNER: BEIJING TERASOLAR ENERGY TECHNOLOGY CO., LTD. Effective date: 20131118 |
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Free format text: CORRECT: ADDRESS; FROM: 101102 TONGZHOU, BEIJING TO: 100070 FENGTAI, BEIJING |
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| TR01 | Transfer of patent right |
Effective date of registration: 20131118 Address after: 100070 Beijing City, Fengtai District science and Technology Park Fung Fu Road No. 4 Building 4 room 22B04 Patentee after: Beijing TeraSolar Photothermal Technology Co., Ltd. Address before: 101102, Beijing Zhongguancun Tongzhou District science and Technology Park, Tongzhou Park Jinqiao technology industry base, King Sheng, two South 37 Street Patentee before: Beijing Zhaoyang Energy Technology Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20121205 |
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