CN103630951B - Light and heat collection Fresnel line focus lens - Google Patents
Light and heat collection Fresnel line focus lens Download PDFInfo
- Publication number
- CN103630951B CN103630951B CN201210299629.1A CN201210299629A CN103630951B CN 103630951 B CN103630951 B CN 103630951B CN 201210299629 A CN201210299629 A CN 201210299629A CN 103630951 B CN103630951 B CN 103630951B
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- light
- focus lens
- line focus
- heat collection
- fresnel line
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- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
- Photovoltaic Devices (AREA)
Abstract
A kind of light and heat collection Fresnel line focus lens, in the often group microprism bunch of lens, the width of lenticular microprism unit is contour principle distribution wide according to middle part, outside, and middle part wider (can choose between 3～5mm), outside narrower (1～3mm), make substrate thickness be more uniformly distributed, structural stability greatly improves, and the total quantity of microprism unit total quantity and vertical shear point is greatly reduced, reduce difficulty of processing, improve sink-efficiency.More efficiently sunlight can be pooled focal line by these lens, condenser as solar energy high temperature heat collector, in order to for heating, air-conditioning, weave, print and dye, papermaking, rubber, desalinization, the life such as sewage purification and industrial circle provide the high temperature heat source of environmental protection.
Description
Technical field
The present invention is a kind of light and heat collection Fresnel line focus lens, belong to solar energy medium and high temperature application, by these lens, more efficiently sunlight can be pooled line burnt, condenser as solar energy high temperature heat collector, focal line produces high temperature, and can efficiently collect by existing solar vacuum heat-collecting pipe, exchange and derive, in order to for heating, air-conditioning, weave, print and dye, papermaking, rubber, desalinization, the life such as sewage purification and industrial circle provide the high temperature heat source of environmental protection
Background technology
Real optical concentration can be divided into reflecting condensation and the big class of refraction condensation two, and the former is burnt type (focus is between light source and reflecting mirror) optically focused before belonging to, and the latter is burnt type (focus is at the rear side of lens) optically focused after being.The research direction of refraction condensation technology, is concentrated mainly on Fresnel Lenses (Fresnellens).This is that French scientist Augustine Fresnel (Augustin.Fresnel) invents application the earliest, and he is initially use this lens in 1822, and apply on the collecting lens of beacon navigation light, have started the beginning of flat-panel collectors.China from the beginning of the seventies until the end of the nineties, solar energy industry and many colleges and universities, light grind institute, Fresnel Lenses for solar energy equipment is carried out and has goed deep into lasting research and practice, such as, HUST and Shaoyang glass factory, developed the glass base Fresnel line focus lens of wide cut the most jointly；Country solar energy research institute and Shaanxi Normal University the most once this was made deep theory and technical study；Tsing-Hua University the most once carried out many trials to its production equipment, and made multiple model machine；Solar energy publication and optics publication during this published many research papers；Someone uses the flexible transparent plastic Fresnel lens of mould pressing method processing larger area, also someone uses the point focusing Fresnel lens of combination forming tool sharpening diameter 1.5m, for various reasons, above-mentioned research the most only rests on experimental level, applies from being introduced into Practical Project.
Fresnel Lenses is a kind of gossamery flat-plate type lens, belongs to thin microstructured optical films technical field.The burnt two big classes of Jiao and line can be divided into by the type of focal spot, but they broadly fall into " burnt afterwards " type condenser, its advantage be focus or focal line at the rear of light source Yu lens, this brings great convenience to the setting of heat collector and the enforcement of Insulation.
Due to light, thin advantage, its supporting construction and tracking system just can be made simple, light and handy, be easily achieved, and can accomplish inexpensive.Meanwhile, also allow for the miniaturization of equipment, lightness, large-scale array can be combined into, for large scale industry purposes or central heating, power supply, relatively mini system can be made again, it is simple to family or scattered user heat supply nearby, power supply, be expected to as one preferable Salar light-gathering harvester.
But, for a long time, it is also due to light, thin reason, it is more difficult to shape and to install and use, be allowed to can not get extensively applying.And, in light path design, the factor of " optics solution picture " power of its entirety is excessively focused on due to people, by the emphasis of light path design based on the degree of distortion reducing image, rather than pay attention to its sink-efficiency, each microprism unit of Fresnel line focus lens is designed to the most wide micro structure, width≤1mm, the quantity of microprism unit is too many, its vertical shear point is too much, it is allowed to the sink-efficiency to sunlight and declines (fall ＞ 30%), own loss is big, self temperature rise in the application, macro-size is caused to change greatly (event of expanding with heat and contract with cold), converge unstable properties, Application of Solar Energy does not performs to its due effect.
Summary of the invention
The object of the invention: 1, based on the sink-efficiency improving Fresnel light condensing lens, the width of Reasonable adjustment each microprism unit, for the purpose of reducing microprism unit total quantity as far as possible, the adjacent microprism unit that will be less than certain altitude merges, increase its width, reduce its quantity, reduce the total quantity of vertical shear point to greatest extent, be allowed to that own loss is preferably minimized, self temperature rise is minimum, sink-efficiency is the highest.2, being coordinated with the embedding of aluminium alloy groove by the chimb of its surrounding by gossamery jumbo light and heat collection Fresnel line focus lens sheet, and be stretched on rigid support, be allowed to geometry and well fixed, optical property is protected.
It is an object of the invention to be achieved through the following technical solutions:
Light and heat collection Fresnel line focus lens is a gular transparent thin slice, and thin slice is shaped with one to multiple bar focal line, wherein comprises one to multiple group of Fresnel line focusing condenser lens unit, surrounding and directly makes or two pairs of chimbs of binding forming；Often the width of group Fresnel line focusing condenser lens lenticular microprism unit is the principle distribution contour according to 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 with groove, and is tightened to the uniform layback of four direction by tensioner.
Advantages of the present invention:
The light and heat collection Fresnel line focus lens of the present invention has a feature of following excellence:
1, high to the convergence efficiency of sunlight: to be that contour principle wide according to middle part, outside is distributed owing to often organizing the width of Fresnel line focusing condenser lens lenticular microprism unit, and middle part wider (can choose between 3～5mm), outside narrower (1～3mm), microprism unit total quantity is greatly reduced, structure is more rational, improves sink-efficiency.
2, plate base thickness is evenly: in Fresnel line focusing condenser lens, if microprism unit is all distributed by wide principle, the height of middle part microprism unit certainly will be the least, the height of outside microprism unit is relatively big (having the difference of ten several times), macroscopically the thickness making plate base is being formed " thick middle, both sides are thin " phenomenon, it is irregular that this will result in plate-extruding machine " die head " flow in process of production, during calendering, the material of melting state produces crossing current, product is easily generated wrinkle, the problems such as percent defective is high, shrinkage factor everywhere is will also result on transverse section inconsistent after shaping, it is allowed to optical property unstable, transmittance declines, directly result in convergence efficiency to decline；And when using the method design of " middle part is wide, outside contour " of the present invention, owing to the width of middle part microprism unit is enlarged so that it increases the most accordingly, and gradually close with external height, on cross section, obtain the plate base that middle part is basically identical with outside thickness.
3, it is easily installed setting: coordinated with the organic of aluminium alloy groove by Fresnel line focus lens chimb so that gossamery jumbo light and heat collection Fresnel line focus lens is prone to setting, fixed installation.
4, appropriate compensation of expanding with heat and contract with cold can be made: tightly acted on by the elastic pre-tensioning of aluminium alloy groove bottom web, out of doors under environment, gossamery jumbo light and heat collection Fresnel line focus lens can be expanded with heat and contract with cold and compensate in right amount, unaffected to ensure its glacing 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 top view of Fig. 1；
Fig. 3 is double focal line light-gathering and heat-collecting Fresnel line focus lens schematic diagrams；
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 concentrating light principles figure；
Fig. 8 is double focal line light-gathering and heat-collecting Fresnel line focus lens concentrating light principles figures；
Fig. 9 is the partial view of Fresnel line focus lens and tensioner installation diagram.
Label in figure: the sunlight (converging light) after 1 chimb, 2 microprism units, 3 plate bases, the vertical shear point of 4 microprism units, the theoretical drift angle of 5 microprism units, the theoretical base angle of 6 microprism units, the actual drift angle of 7 microprism units, the actual base angle of 8 microprism units, 9 sun incident illuminations, 10 single focal line light-gathering and heat-collecting Fresnel line focus lens, 11 refractions, 12 focal lines, 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.
Detailed description of the invention
It is described further with detailed description of the invention below in conjunction with the accompanying drawings.
The structural principle of the present invention is as shown in Figure 1.The light and heat collection Fresnel line focus lens of the present invention is made up 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 principle that wide outside, middle part is contour；In the present embodiment, microprism unit is according to middle part c=3mm width (Fig. 4), outside principle design high for h=1mm；As shown in Figure 6, the a district part at middle part is originally the height smaller part part belonging to microprism unit, modern its several microprism units are merged into one wider and possess the prism unit of proper height, the quantity making part microprism unit of a district is greatly reduced, the height of each microprism unit increases to again appropriate size (≤h), it is easy to shapes and improves its diffraction efficiency.
Fig. 4, Fig. 5 are the partial enlarged drawings of the present invention, wherein, Fig. 4 be microprism unit theoretical curve, Fig. 5 be microprism unit actual curve；In Fresnel Lenses, the vertical shear point 4 of microprism unit less, drift angle 5 and base angle 6 more " sharp ", the loss of its overall light is the fewest, and diffraction efficiency is the highest；But in the actual technique shaped, its drift angle 5 and base angle 6 are the most inevitably with certain " R " degree, as shown in 7 in Fig. 5 and 8, so, in the scope " δ " of two " R " degree institute width lid, light cannot be efficiently refracted to focal line 12, and the light only having " p " section could be refracted to focal line 12 effectively, therefore, for improving the diffraction efficiency of light and heat collection Fresnel line focus lens, allow except adopting an effective measure in processing technique " R " angle try one's best little in addition to, the quantity also allowing micro-mould mirror first in the design is few as best one can, namely, the width making each micro-mould mirror first is the biggest, but the setting height being not higher than microprism unit with corresponding vertical edges height h (Fig. 4) is as the criterion.In the microprism unit bunch of Fresnel Lenses, the inclination angle λ (Fig. 4) of every microprism unit by middle part to both sides always in the trend being gradually increased, middle part is less, it is gradually increased towards both sides, therefore, the vertical edges height h of the microprism unit of a district, middle part (Fig. 6) part is also along middle part outwards in the trend being gradually increased, but always≤setting height (the present embodiment is 1mm)；When the vertical edges height h of the microprism unit 2 of certain fixed width breaks through setting height (the present embodiment is 1mm) of Tu6Zhong b district part, then the width of this microprism unit will reduce in right amount, to meet the condition that its vertical edges height is not more than the setting height in b district part (Fig. 6), and from the beginning of this microprism unit, the microprism unit launching distribution to both sides will use the method reducing width one by one, to meet its height h condition equal to setting height (the present embodiment is as 1mm), namely, in this microprism unit bunch, wide part a end of extent, contour part b district starts.
In figure 6, the width c the most equal (the present embodiment is 3mm) of every microprism unit in a district, but h is the most different for its height, highly h along middle part to both sides in the trend being gradually increased, but h is maximum without departing from setting height (the present embodiment is 1mm)；Inclination angle λ is in the trend being gradually increased.
In figure 6, in b district, the height h of every microprism unit is the most equal, but its width c is the most different, width c along middle part to both sides in the trend being gradually reduced, inclination angle λ is in the trend being gradually increased, but the maximum angle of total reflection being not more than material.
Use the light and heat collection Fresnel line focus lens that this method for designing manufactures, when focal distance f (see Fig. 7, Fig. 8) and cell width n mono-timing, the sum of its microprism unit will be minimum, therefore, affect the vertical shear point 4 (see Fig. 4) of diffraction efficiency and the quantity of light-receiving area δ (see Fig. 5) that technique R angle takies will be all minimum, so, diffraction efficiency is the highest.
Fig. 7 is the sectional drawing adopting the single focal line light-gathering and heat-collecting Fresnel line focus lens designed in this way, extends forwards, backwards along section, is the formation of the light and heat collection Fresnel line focus lens sheet of single focal line of one fixed width, random length.
Fig. 8 is the sectional drawing adopting the double focal line light-gathering and heat-collecting Fresnel line focus lens designed in this way, extends forwards, backwards along section, is the formation of the light and heat collection Fresnel line focus lens sheet of the bifocal line of one fixed width, random length；In like manner, the light and heat collection Fresnel line focus lens sheet of many focal lines can also be designed in this way.
Fig. 9 is the chimb partial sectional view with the assembling application of aluminium alloy groove of this Fresnel line focus lens sheet, and this will make gossamery jumbo light and heat collection Fresnel line focus lens sheet be prone to setting, fixed installation.Owing to 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, gossamery jumbo light and heat collection Fresnel line focus lens can be expanded with heat and contract with cold and compensate in right amount, unaffected to ensure its glacing flatness.
By each bar meeting focal line parallel projection of this light and heat collection Fresnel line focus lens passing through " tightening ", " Zhang Zhi " on solar energy vacuum tube or collector metal pipe, just can will be greater than being incident upon on the relatively small solar energy vacuum tube of area or collector metal pipe after the sunlight of thermal-collecting tube bulk area " concentrates ", constitute solar energy medium and high temperature heat collector.With multiple such solar energy high temperature heat collector forming arrays, solar boiler or fresh-water generator or sewage purification device can be formed or as urban heat supplying equipment or as the heater of other industrial equipment.
The raising more than 30% of the more conventional type of convergence efficiency of the light and heat collection Fresnel line focus lens of the present invention, efficiently, economic and practical, use field is extensive, the solar energy medium and high temperature heat collector of multiple use can be gathered with such light and heat collection Fresnel line focus lens, therefore, the content described by embodiment it is not limited to.
Claims (6)
1. a light and heat collection Fresnel line focus lens, condenser as solar energy high temperature heat collector, it is made up of macromolecule transparent optical material, by substrate, microprism unit is constituted, it is characterized in that: light and heat collection Fresnel line focus lens is a gular transparent thin slice, wherein comprise one to multiple group of Fresnel line focusing condenser lens microprism bunch, the width of every bunch of Fresnel line focusing condenser lens lenticular microprism unit is wide according to middle part, outside contour principle distribution, middle height is gradually increased along center to both sides, maximum without departing from setting height, inclination angle, middle part is gradually increased, external width is gradually reduced to both sides from outside original position, peripheral rake is gradually increased, but the maximum angle of total reflection being not more than material.
Light and heat collection Fresnel line focus lens the most according to claim 1, it is characterised in that: the surrounding of light and heat collection Fresnel line focus lens has directly making or two pairs of chimbs of binding forming.
Light and heat collection Fresnel line focus lens the most according to claim 2, it is characterised 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 with groove, and is tightened to the uniform layback of four direction by tensioner.
Light and heat collection Fresnel line focus lens the most according to claim 1 and 2, it is characterised in that: two pairs of chimbs of light and heat collection Fresnel line focus lens surrounding be middle part continuously, disconnect at four angles and be separated by one section of aluminium alloy extrusions allowing with groove and can penetrate from four limits and not produce the breach of geometrical interference.
Light and heat collection Fresnel line focus lens the most according to claim 1 and 2, it is characterised in that: each bar meeting focal line parallel projection in light and heat collection Fresnel line focus lens, on solar energy vacuum tube or collector metal pipe, constitutes solar energy medium and high temperature heat collector.
Light and heat collection Fresnel line focus lens the most according to claim 5, it is characterized in that: with multiple such solar energy medium and high temperature heat collector forming arrays, composition solar energy steam boiler or fresh-water generator or sewage purification device or as urban heat supplying equipment or as the heater of other industrial equipment.
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 CN103630951A (en) | 2014-03-12 |
| CN103630951B true CN103630951B (en) | 2016-08-03 |
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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 (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002243917A (en) * | 2001-02-19 | 2002-08-28 | Asahi Kasei Corp | Negative sheet for fresnel lens |
-
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 (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
|---|---|
| CN103630951A (en) | 2014-03-12 |
| WO2014029259A1 (en) | 2014-02-27 |
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