CN103630951A - Solar concentrating and collecting line-focus Fresnel lens - Google Patents
Solar concentrating and collecting line-focus Fresnel lens Download PDFInfo
- Publication number
- CN103630951A CN103630951A CN201210299629.1A CN201210299629A CN103630951A CN 103630951 A CN103630951 A CN 103630951A CN 201210299629 A CN201210299629 A CN 201210299629A CN 103630951 A CN103630951 A CN 103630951A
- Authority
- CN
- China
- Prior art keywords
- light
- focus lens
- line focus
- heat collection
- fresnel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Photovoltaic Devices (AREA)
Abstract
Disclosed is a solar concentrating and collecting line-focus Fresnel lens. Distribution of microprism elements in each microprism cluster of the lens follows the following principle: middle parts of the microprism elements have equal widths, and outer parts of the microprism elements have equal heights; and in addition, the middle parts are relatively wide (the widths range from 3 to 5 mm), and the outer parts are relatively narrow (the widths range from 1 to 3 mm), so that the thickness of a substrate is more uniform, structural stability is significantly improved, and the total number of the microprism elements and the total number of vertical shearing points are greatly reduced, thereby lowering the processing difficulty and improving convergence efficiency. The lens can concentrate sunlight into a focal line more efficiently, and can be used as a condenser of a high-temperature solar collector, so as to provide a green high-temperature heat source for domestic and industrial fields such as heating, air conditioning, textile, printing and dyeing, papermaking, rubber, sea water desalination, sewage purification and the like.
Description
Technical field
The present invention is a kind of light and heat collection Fresnel line focus lens, belong to sun power medium and high temperature application, by these lens, can more efficiently sunshine be pooled to line Jiao, condenser as solar energy high temperature heat collector, on focal line, produce high temperature, and can efficiently collect, exchange and derive by existing solar vacuum heat-collecting pipe, to provide the high temperature heat source of environmental protection for the lives such as heating, air-conditioning, weaving, printing and dyeing, papermaking, rubber, desalinization, sewage purification and industrial circle.
Background technology
Optical concentration can be divided into reflecting condensation and the large class of refraction optically focused two, and the former belongs to front burnt type (focus is between light source and catoptron) optically focused, and the latter is rear burnt type (focus is at the rear side of lens) optically focused.The research direction of refraction optically focused technology, mainly concentrates on Fresnel Lenses (Fresnel lens).This is that French scientist Augustine Fresnel (Augustin.Fresnel) is invented application the earliest, and he is initial in 1822 uses this lens, and is applied on the collector lens of beacon navigation light, has started the beginning of flat-panel collectors.China is from the beginning of the seventies until the end of the nineties, sun power industry and many colleges and universities, light grind institute, to having carried out and goed deep into lasting research and practice for the Fresnel Lenses of solar energy equipment, such as, HUST and Shaoyang glass factory, once developed the glass-based Fresnel line focus lens of wide cut jointly; Solar energy research Suo Yu Shaanxi Normal University of country also once made deep theory and technical study to this; Tsing-Hua University also once carried out many trials to its production equipment, and made multiple model machine; Sun power publication and optics publication during this published many research papers; Someone adopts mould pressing method processing larger area flexible transparent plastic Fresnel lens, also someone adopts the point focusing Fresnel lens of combination forming tool sharpening diameter 1.5m, for various reasons, above-mentioned research all only rests on experimental level, never enters in Practical Project and applies.
Fresnel Lenses is a kind of gossamery flat-plate type lens, belongs to thin microstructured optical films technical field.By the type of focal spot, can be divided into Jiao and the burnt two large classes of line, but they all belong to " burnt afterwards " type condenser, its advantage is focus or focal line side after light source and lens, and this brings great convenience to the setting of heat collector and the enforcement of Insulation.
Due to light, thin advantage, its supporting construction and tracker just can do simply, lightly, be easy to realize, and can accomplish inexpensive.Meanwhile, be also convenient to miniaturization, the lightness of equipment, can be combined into large-scale array, be used for large scale industry purposes or central heating, power supply, can make compared with mini system again, be convenient to user's heat supply nearby, the power supply of family or dispersion, be expected to as a kind of desirable Salar light-gathering collector.
But, for a long time, be also due to light, thin, be difficult to setting and install and use, make it can not get widespread use.And, in light path design, because people too focus on the factor of " optics solution picture " power of its integral body, the emphasis of light path design is based on reducing to the degree of distortion of image, rather than pay attention to its sink-efficiency, each microprism unit of Fresnel line focus lens is designed to wide microstructure completely, width≤1mm, the quantity of microprism unit is too many, its vertical shear point is too much, make it the sink-efficiency decline (fall > 30%) to sunshine, own loss is large, self temperature rise in application, cause macro-size to change greatly (the event of expanding with heat and contract with cold), converge unstable properties, in Application of Solar Energy, do not perform to its due effect.
Summary of the invention
The object of the invention: the sink-efficiency that 1, is based on improving Fresnel light condensing lens, rationally adjust the width of each microprism unit, take that to reduce microprism unit total quantity be object as far as possible, adjacent microprism unit lower than certain altitude is merged, increase its width, reduce its quantity, reduce to greatest extent the total quantity of vertical shear point, make it own loss drop to minimum, self temperature rise is minimum, sink-efficiency is the highest.2, by gossamery jumbo light and heat collection Fresnel line focus lens sheet, the chimb by its surrounding coordinates with the embedding of aluminium alloy groove, and is stretched on rigid support, makes it geometric configuration and is well fixed, and optical property is protected.
The object of the invention is to be achieved through the following technical solutions:
Light and heat collection Fresnel line focus lens is a rectangle transparent sheet, is shaped with one to multiple focal line on thin slice, wherein comprises one to multiple group of Fresnel line focusing condenser lens unit, surrounding is directly made or two pairs of chimbs of binding forming; The width of the microprism unit of every group of Fresnel line focusing condenser lens is to distribute according to the contour principle in wide outside, middle part.
Two pairs of chimbs of light and heat collection Fresnel line focus lens surrounding can overlap mutually with the aluminium alloy extrusions of band hook groove, and tighten to the even layback of four direction by tensioning system.
advantage of the present invention:
Light and heat collection Fresnel line focus lens of the present invention has the feature of following excellence:
1, it is high to the convergence efficiency of sunshine: because the width of the microprism unit of every group of Fresnel line focusing condenser lens is that wide according to middle part, outside contour principle distributes, and middle part wider (can between 3～5mm, choose), outside narrower (1～3mm), microprism unit total quantity is greatly reduced, structure is more rational, has improved sink-efficiency.
2, plate base thickness is more even: in Fresnel line focusing condenser lens, when if microprism unit all distributes by wide principle, the height of middle part microprism unit certainly will be very little, the height of outside microprism unit is large (having the poor of ten several times), in macroscopic view, will make the thickness of plate base form " thick middle, both sides are thin " phenomenon, this will cause plate-extruding machine " die head " flow irregular in process of production, the material production of melting state crossing current during calendering, product easily produces wrinkle, the problems such as rejection rate height, after shaping, also can cause on transversal section shrinkage factor everywhere inconsistent, make it optical property unstable, penetrability declines, directly cause assembling decrease in efficiency, and while adopting the method design at " middle part wide, outside contour " of the present invention, because the width of middle part microprism unit is strengthened, make its highly also corresponding increase, and approach with external height gradually, on transverse section, obtained the basically identical plate base of middle part and outside thickness.
3, be easy to setting is installed: by Fresnel line focus lens chimb, coordinate with the organic of aluminium alloy groove, make gossamery jumbo light and heat collection Fresnel line focus lens be easy to setting, fixed installation.
4, can do the appropriate compensation of expanding with heat and contract with cold: the elastic pre-tensioning by aluminium alloy groove bottom web tightly acts on, out of doors under environment, can compensate in right amount expanding with heat and contract with cold of gossamery jumbo light and heat collection Fresnel line focus lens, unaffected to guarantee its flatness.
Accompanying drawing explanation
Fig. 1 is single focal line light-gathering and heat-collecting Fresnel line focus lens front view;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is two focal line light-gathering and heat-collecting Fresnel line focus lens schematic diagram;
Fig. 4 is the theoretical curve partial enlarged drawing of light and heat collection Fresnel line focus lens microprism unit;
Fig. 5 is the actual processing effect enlarged drawing of light and heat collection Fresnel line focus lens microprism unit;
Fig. 6 is single focal line light-gathering and heat-collecting Fresnel line focus lens microprism Meta Partition figure;
Fig. 7 is single focal line light-gathering and heat-collecting Fresnel line focus lens optically focused schematic diagram;
Fig. 8 is two focal line light-gathering and heat-collecting Fresnel line focus lens optically focused schematic diagrams;
Fig. 9 is the partial view of Fresnel line focus lens and tensioning system wiring layout.
Number in the figure: the sunshine (converging light) after 1 chimb, 2 microprism units, 3 plate bases, the vertical shear point of 4 microprism units, the theoretical base angle of the theoretical drift angle of 5 microprism units, 6 microprism units, the actual base angle of the actual drift angle of 7 microprism units, 8 microprism units, 9 sun incident lights, 10 single focal line light-gathering and heat-collecting Fresnel line focus lens, 11 refractions, 12 focal lines, the 13 pairs of focal line light-gathering and heat-collecting Fresnel line focus lens, 14 tensioning aluminium alloy extrusions, 15 tensioning screws, 16 rigid frames.
Embodiment
Below in conjunction with the drawings and specific embodiments, be described further.
Structural principle of the present invention as shown in Figure 1.Light and heat collection Fresnel line focus lens of the present invention consists of chimb 1, microprism unit 2,3 three parts of plate base, and wherein, microprism unit 2 is distributed on plate base 3 by the contour principle in wide outside, middle part; In the present embodiment, microprism unit is according to the high principle design of middle part c=3mm wide (Fig. 4), outside h=1mm; As shown in Figure 6, the height smaller part part that belongs to microprism unit is partly originally in a district at middle part, modern its several microprism unit is merged into one compared with wide and possess the prism unit of proper height, the quantity of a district part microprism unit is greatly reduced, the height of each microprism unit is increased to again compared with suitable dimension (≤h), is easy to shape and improves it reflect efficiency.
Fig. 4, Fig. 5 are partial enlarged drawings of the present invention, and wherein, Fig. 4 is that theoretical curve, Fig. 5 of microprism unit is the actual curve of microprism unit, in Fresnel Lenses, the vertical shear point 4 of microprism unit less, drift angle 5 and base angle 6 more " sharp ", its overall light loss is just fewer, refraction efficiency is higher, but in the actual technique shaping, its drift angle 5 is always inevitably spent with certain " R " with base angle 6, as shown in 7 in Fig. 5 and 8, like this, in the scope " δ " of two " R " degree institute width lid, light just can not be reflected to focal line 12 effectively, and only have the light of " p " section could effectively be refracted to focal line 12, therefore, for improving the refraction efficiency of light and heat collection Fresnel line focus lens, except adopting an effective measure in processing technology, allow " R " angle try one's best little, also in design, allow the quantity of micro-mould mirror unit few as best one can, also be, make the width of each micro-mould mirror unit large as best one can, but with corresponding perpendicular edge height h(Fig. 4) not the setting height higher than microprism unit be as the criterion.In the microprism unit of Fresnel Lenses bunch, the inclination angle λ (Fig. 4) of every microprism unit is always the trend increasing gradually to both sides by middle part, middle part is less, towards both sides, increase gradually, therefore, the perpendicular edge height h of the microprism unit of a district, middle part (Fig. 6) part is outwards the trend increasing gradually along middle part, but always≤setting height (the present embodiment is 1mm), when the perpendicular edge height h of the microprism unit 2 of certain Fixed width breaks through the setting height (the present embodiment is 1mm) of Tu6Zhong b district part, the width of this microprism unit will reduce in right amount, to meet its perpendicular edge height, be not more than the condition of the setting height of b district part (Fig. 6), and from this microprism unit, the microprism unit that launches to both sides to distribute will adopt the method for reducing one by one width, take and meet the condition that its height h equals setting height (the present embodiment is 1mm), also be, in first bunch of this microprism, wide part a end of extent, contour part b district starts.
In Tu6Zhong， a district, the width c of every microprism unit all equates (the present embodiment is 3mm), but its height h is different, and height h is the trend increasing gradually along middle part to both sides, but h the most very much not exceeds setting height (the present embodiment is 1mm); Inclination angle λ is the trend increasing gradually.
In Tu6Zhong， b district, the height h of every microprism unit all equates, but its width c is different, and width c is the trend reducing gradually along middle part to both sides, and inclination angle λ is the trend increasing gradually, but the maximum angle of total reflection that is not more than material.
Adopt the produced light and heat collection Fresnel of this method for designing line focus lens, when focal distance f (seeing Fig. 7, Fig. 8) and cell width n mono-timing, the sum of its microprism unit will be minimum, therefore, the vertical shear point 4(of impact refraction efficiency is shown in Fig. 4) and the quantity of the light-receiving area δ (see figure 5) that takies of technique R angle will be all minimum, so refraction efficiency is the highest.
Fig. 7 is the sectional drawing of adopting in this way single focal line light-gathering and heat-collecting Fresnel line focus lens of design, along section, extend forwards, backwards, has just formed the light and heat collection Fresnel line focus lens sheet of single focal line of certain width, random length.
Fig. 8 is the sectional drawing of adopting in this way two focal line light-gathering and heat-collecting Fresnel line focus lens of design, along section, extend forwards, backwards, has just formed the light and heat collection Fresnel line focus lens sheet of the bifocal line of certain width, random length; In like manner, can also design in this way the light and heat collection Fresnel line focus lens sheet of multifocal line.
Fig. 9 is the chimb of this Fresnel line focus lens sheet and the partial sectional view of aluminium alloy groove assembling application, and this will make gossamery jumbo light and heat collection Fresnel line focus lens sheet be easy to setting, fixed installation.Because tensioning aluminium alloy extrusions 14 is fixed on rigid frame 16 by tensioning screw 15, tensioning aluminium alloy groove bottom web possesses certain elastic pre-tensioning and tightly acts on, out of doors under environment, can compensate in right amount expanding with heat and contract with cold of gossamery jumbo light and heat collection Fresnel line focus lens, unaffected to guarantee its flatness.
By this process " tighten ", the light and heat collection Fresnel line focus lens of " Zhang Zhi " each can focal line parallel projection on solar energy vacuum tube or collector metal pipe, after just the sunshine that is greater than this bulk area of thermal-collecting tube " being concentrated ", be incident upon on the solar energy vacuum tube or collector metal pipe that area is relatively little, form sun power medium and high temperature heat collector.With a plurality of such solar energy high temperature heat collector forming arrays, can form solar boiler or fresh-water generator or sewage purification device or as urban heat supplying equipment or as the heater of other commercial unit.
The convergence efficiency of light and heat collection Fresnel line focus lens of the present invention is compared with the improve of conventional type more than 30%, efficiently, economic and practical, use field is extensive, with such light and heat collection Fresnel line focus lens, can gather multi-purpose sun power medium and high temperature heat collector, therefore, be not limited to the described content of embodiment.
Claims (7)
1. a light and heat collection Fresnel line focus lens, condenser as solar energy high temperature heat collector, by macromolecule transparent optical material, made, by substrate, microprism unit, formed, it is characterized in that: light and heat collection Fresnel line focus lens is a rectangle transparent sheet, on thin slice, be shaped with one to multiple focal line, wherein comprise one to multiple group of Fresnel line focusing condenser lens microprism bunch, the width of the microprism unit of every bunch of Fresnel line focusing condenser lens is that wide according to middle part, outside contour principle distributes.
2. light and heat collection Fresnel line focus lens according to claim 1, is characterized in that: the surrounding of light and heat collection Fresnel line focus lens sheet has two pairs of chimbs of direct making or binding forming.
3. light and heat collection Fresnel line focus lens according to claim 2, is characterized in that: two pairs of chimbs of light and heat collection Fresnel line focus lens surrounding can overlap mutually with the aluminium alloy extrusions of band hook groove, and tighten to the even layback of four direction by tensioning system.
4. light and heat collection Fresnel line focus lens according to claim 1 and 2, is characterized in that: two pairs of chimbs of light and heat collection Fresnel line focus lens surrounding are for middle part is continuous, place, four angles disconnects and the aluminium alloy extrusions that allows band hook groove of being separated by a section can penetrate the breach that does not produce geometrical interference from four limits.
5. light and heat collection Fresnel line focus lens according to claim 1, it is characterized in that: light and heat collection Fresnel line focus lens integral body is carried out the sclerosis of disposable surface by having the inorganic polysiloxane of super hydrophile function, obtains surperficial high rigidity and Superhydrophilic simultaneously.
6. light and heat collection Fresnel line focus lens according to claim 1 and 2, it is characterized in that: each in light and heat collection Fresnel line focus lens can focal line parallel projection on solar energy vacuum tube or collector metal pipe, form sun power medium and high temperature heat collector.
7. solar energy high temperature heat collector according to claim 6, it is characterized in that: with a plurality of such sun power medium and high temperature heat collector forming arrays, form solar energy steam boiler or fresh-water generator or sewage purification device or as urban heat supplying equipment or as the heater of other commercial unit.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210299629.1A CN103630951B (en) | 2012-08-22 | 2012-08-22 | Light and heat collection Fresnel line focus lens |
| PCT/CN2013/080372 WO2014029259A1 (en) | 2012-08-22 | 2013-07-30 | Solar concentrating and collecting line-focus fresnel lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210299629.1A CN103630951B (en) | 2012-08-22 | 2012-08-22 | Light and heat collection Fresnel line focus lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103630951A true CN103630951A (en) | 2014-03-12 |
| CN103630951B CN103630951B (en) | 2016-08-03 |
Family
ID=50149407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210299629.1A Expired - Fee Related CN103630951B (en) | 2012-08-22 | 2012-08-22 | Light and heat collection Fresnel line focus lens |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103630951B (en) |
| WO (1) | WO2014029259A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002243917A (en) * | 2001-02-19 | 2002-08-28 | Asahi Kasei Corp | Negative sheet for fresnel lens |
| CN101210746A (en) * | 2007-12-24 | 2008-07-02 | 林祥参 | Refraction type light gathering solar energy high temperature heat collector capable of fixedly mounting |
| CN101666897A (en) * | 2008-09-01 | 2010-03-10 | 陈鼎凌 | Refractive solar energy converging device |
| CN101956950A (en) * | 2009-07-15 | 2011-01-26 | 颖台科技股份有限公司 | Optical thin plate and manufacture method thereof as well as backlight module |
| CN102280511A (en) * | 2011-08-23 | 2011-12-14 | 北京工业大学 | Dense array concentrating solar energy photovoltaic device |
| CN102590903A (en) * | 2012-03-23 | 2012-07-18 | 陕西科技大学 | Design method for glass Fresnel lens mould |
-
2012
- 2012-08-22 CN CN201210299629.1A patent/CN103630951B/en not_active Expired - Fee Related
-
2013
- 2013-07-30 WO PCT/CN2013/080372 patent/WO2014029259A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002243917A (en) * | 2001-02-19 | 2002-08-28 | Asahi Kasei Corp | Negative sheet for fresnel lens |
| CN101210746A (en) * | 2007-12-24 | 2008-07-02 | 林祥参 | Refraction type light gathering solar energy high temperature heat collector capable of fixedly mounting |
| CN101666897A (en) * | 2008-09-01 | 2010-03-10 | 陈鼎凌 | Refractive solar energy converging device |
| CN101956950A (en) * | 2009-07-15 | 2011-01-26 | 颖台科技股份有限公司 | Optical thin plate and manufacture method thereof as well as backlight module |
| CN102280511A (en) * | 2011-08-23 | 2011-12-14 | 北京工业大学 | Dense array concentrating solar energy photovoltaic device |
| CN102590903A (en) * | 2012-03-23 | 2012-07-18 | 陕西科技大学 | Design method for glass Fresnel lens mould |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014029259A1 (en) | 2014-02-27 |
| CN103630951B (en) | 2016-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101667604B (en) | Design method of solar energy uniform light superposition reflective condenser | |
| CN101101156A (en) | Solar water heater | |
| CN102798968A (en) | Sectional type groove type solar energy condenser | |
| CN107919848A (en) | A kind of annular linear Fresnel high power concentrator device | |
| CN101520547B (en) | Method for manufacturing flexure cylindrical mirror condenser | |
| CN109581550A (en) | A kind of Fresnel light condensing lens and preparation method thereof | |
| CN103022205B (en) | Line condensing lens | |
| AU2012210521A1 (en) | Long-life optical concentrator based on a specific fresnel lens produced from polymeric materials for solar power generation | |
| CN104849846B (en) | A kind of collector lens and its design method | |
| CN107024007B (en) | Based on the multifocal Fresnel photo-thermal concentration structure of nonimaging optics subregion and method | |
| CN101587235B (en) | Construction of deflection cylinder condenser lens | |
| CN103630951A (en) | Solar concentrating and collecting line-focus Fresnel lens | |
| CN101609853B (en) | Multiple-row linked solar uniform condensing tracking device | |
| WO2011029214A1 (en) | Solar condensing device | |
| KR101720651B1 (en) | Concentrating Photovoltaics System using Curved Solar Cell | |
| KR101091249B1 (en) | Apparatus for solar condenser | |
| CN201956363U (en) | Multifunctional solar module and solar electric heating system using same | |
| CN201729764U (en) | Mould for producing curved glass plates and solar light gathering plate made of curved glass plates | |
| CN203799105U (en) | Wide single-distance linear focusing grating piece | |
| CN201051153Y (en) | Bar focusing screen | |
| CN202870380U (en) | Sectional groove type solar concentrator | |
| CN202109675U (en) | Groove type solar reflection mirror condenser | |
| CN203118979U (en) | Double-sided energy-gathering photocell | |
| KR20120136463A (en) | Put sunlight detector to collect it into heat collection system by using focus of many flat reflection lens | |
| CN220019922U (en) | Fresnel columnar lens array for solar photo-thermal utilization |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160803 Termination date: 20190822 |