CN107166757A - The circular Fresnel type solar collecting device of point focusing twice - Google Patents

The circular Fresnel type solar collecting device of point focusing twice Download PDF

Info

Publication number
CN107166757A
CN107166757A CN201710363000.1A CN201710363000A CN107166757A CN 107166757 A CN107166757 A CN 107166757A CN 201710363000 A CN201710363000 A CN 201710363000A CN 107166757 A CN107166757 A CN 107166757A
Authority
CN
China
Prior art keywords
thermal
concentrator
tube
circular fresnel
secondary condenser
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.)
Pending
Application number
CN201710363000.1A
Other languages
Chinese (zh)
Inventor
汪城
朱晔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changzhou University
Original Assignee
Changzhou University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Changzhou University filed Critical Changzhou University
Priority to CN201710363000.1A priority Critical patent/CN107166757A/en
Publication of CN107166757A publication Critical patent/CN107166757A/en
Priority to PCT/CN2018/087466 priority patent/WO2018210331A1/en
Priority to US16/614,375 priority patent/US11692740B2/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/44Heat exchange systems
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/47Mountings or tracking

Abstract

The present invention relates to a kind of circular Fresnel type solar collecting device of point focusing twice, including:Heat collector, secondary condenser and support, heat collector include a concentrator and thermal-collecting tube, and a concentrator is circular Fresnel speculum;Secondary condenser is rotational paraboloid mirror or circular Fresnel speculum;Thermal-collecting tube is located at No. one time between concentrator and secondary condenser, and thermal-collecting tube is in the focal spot of a concentrator and secondary condenser simultaneously;Support is used for concentrator of support, secondary condenser and thermal-collecting tube.The invention provides solar collecting device, secondary condenser is additionally arranged for rotational paraboloid mirror, heat collector is located between secondary condenser and a concentrator, and be on the focus point of secondary condenser, the sunshine of heat collector can be will transmit through, circular Fresnel speculum is reflexed to again, heat collector is being gathered again, few, collecting efficiency height is lost in light stream.

Description

The circular Fresnel type solar collecting device of point focusing twice
Technical field
The present invention relates to a kind of circular Fresnel type solar collecting device of point focusing twice, and in particular to a kind of photo-thermal The high solar collecting device of transformation efficiency.
Background technology
Heat collector is to carry out light path control to radiation parallel light by reflecting surface, increases the heating power to object, from And improve the device of object temperature.From light path control and the angle focused on, there are two kinds of focusing and non-focusing;Wherein, focusing heat collection The heating power of device is more than non-focusing heat collector, can realize higher heating-up temperature.It is main wired for concentrating collector Focus on and the major class of point focusing two, line focus is that parallel rays is focused into wire;Point focusing is that parallel rays is focused into point-like.
Focusing ratio is the important technology index of spotlight camber, and different focusing ratios will have influence on the heating work(of heated object Rate and the temperature range that can be reached.The form that reflecting surface is focused on than depending primarily on is focused on, whether is penetrated instead according to light path Face is penetrated, there is reflection-type and transmission-type.Reflection-type focuses on reflecting surface mainly parabolic type and Fresnel type at present;According to line focus and The difference of point focusing, there is parabola and line focus fresnel reflecting mirror;The paraboloid of revolution and circular Fresnel speculum.Thus, Slot light collection and the class technology path of dish-style optically focused two are generated in engineering, and generates the technology path and product of correlation and answers With.
For absorption pattern of the heated object in heat collector for radiation energy, there are direct-type and indirect type;Direct-type is profit The rise that radiation energy is converted into own temperature is directly absorbed with medium;Indirect type is to absorb radiation energy, coating temperature using coating After rise, heat transfer is to heated medium, so as to lift medium temperature.
The Technological improvement plan of direct absorption is implemented primarily directed to the focusing ratio of light incident path is improved, different Its focusing ratio of the concentrator of type has very big difference:The focusing ratio scope of rotary paraboloid light-gathering heat collector is very high, and about 500 To 3000;The focusing ratio scope about 20 to 80 of parabolic-cylinder light heat collector;The optically focused of linear Fresnel lens concentrating collector Than scope about 6 to 30;The focusing ratio scope of circular Fresnel lens concentrating collector is higher, and about 100 to 1000;Linear phenanthrene alunite The focusing ratio scope about 15 to 50 of ear reflex mirror concentrating collector.Therefore, combined using different concentrators or concentrator, device Also there is larger difference for the collection efficiency of light.This patent is collected and utilized mainly for the light of the part, So as to improve optics/photo-thermal efficiency of device.
The content of the invention
The technical problem to be solved in the present invention is:It is higher in order to solve existing middle temperature solar heat collector unit cost, And the problem of collecting efficiency is low, the invention provides a kind of circular Fresnel type solar collecting device of point focusing twice, Secondary condenser is additionally arranged on the basis of existing technology, and the secondary condenser is rotational paraboloid mirror or circular Fresnel Speculum, thermal-collecting tube is located between secondary condenser and a concentrator, and is on the focus point of secondary condenser, can be by Through the sunshine of thermal-collecting tube, a concentrator is reflexed to again, is gathering heat collector again, few, collecting efficiency is lost in light stream It is high.
The technical solution adopted for the present invention to solve the technical problems is:A kind of circular Fresnel type of point focusing twice is too Positive energy collection device, including:Heat collector, secondary condenser and support,
The heat collector includes a concentrator and thermal-collecting tube, and a concentrator is circular Fresnel speculum, the circle Fresnel reflecting mirror has focus point;
The secondary condenser is rotational paraboloid mirror or circular Fresnel speculum, and the secondary condenser has poly- Focus;
The thermal-collecting tube is located at No. one time between concentrator and secondary condenser, and thermal-collecting tube is in a concentrator simultaneously With the focal spot of secondary condenser, thermal-collecting tube carrying has energy absorbent medium;
The support is used for concentrator of support, secondary condenser and thermal-collecting tube.
Specifically, above-mentioned thermal-collecting tube is elliposoidal, spherical or square.
Specifically, above-mentioned thermal-collecting tube is vacuum tube, including outer tube and inner tube, the interlayer between outer tube and inner tube For vacuum, inner tube carrying energy absorbent medium.
Specifically, above-mentioned outer tube and inner tube are light-transmission tube.
Specifically, above-mentioned outer tube material is glass, PMMA or PC.
Specifically, above-mentioned inner tube material is glass, PMMA or PC.
Specifically, in addition to solar energy tracking device.
The beneficial effects of the invention are as follows:
(1) the invention provides a kind of circular Fresnel type solar collecting device of point focusing twice, in prior art On the basis of be additionally arranged secondary condenser, the secondary condenser be rotational paraboloid mirror or circular Fresnel speculum, collection Heat pipe is located between secondary condenser and a concentrator, and is on the focus point of secondary condenser, can will transmit through thermal-arrest The sunshine of pipe, by reflexing to again on a concentrator for secondary condenser, is gathering thermal-collecting tube, light stream is lost again Few, collecting efficiency is high.
(2) the invention provides a kind of circular Fresnel type solar collecting device of point focusing twice, outer tube and interior Layer pipe is light-transmission tube, the light after circular Fresnel focusing mirror can be made to be absorbed by thermal-collecting tube, unabsorbed light meeting Secondary condenser is reached through thermal-collecting tube, directional light is changed into, secondary focusing is carried out by a concentrator, makes it in thermal-collecting tube quilt Absorb, further increase the collecting efficiency of solar collecting device.
(3) the invention provides a kind of circular Fresnel type solar collecting device of point focusing twice, in prior art On the basis of be additionally arranged secondary condenser, can effectively prevent the erosion to thermal-collecting tube such as dust storm, sleet, effectively extend thermal-arrest The service life of pipe, extends the service life of solar collecting device.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is a kind of rotational paraboloid mirror enhancing circular Fresnel speculum point focusing solar energy collecting of the present invention The light path schematic diagram of device;
Fig. 2 is a kind of rotational paraboloid mirror enhancing circular Fresnel speculum point focusing solar energy collecting of the present invention The structural representation of device;
Fig. 3 is a kind of circular Fresnel speculum enhancing circular Fresnel speculum point focusing solar energy collecting of the present invention The light path schematic diagram of device;
Fig. 4 is a kind of circular Fresnel speculum enhancing circular Fresnel speculum point focusing solar energy collecting of the present invention The structural representation of device;
Fig. 5 is a kind of preferred office of the circular Fresnel type solar collecting device thermal-collecting tube of point focusing twice of the present invention Portion's structural representation;
In figure:1. heat collector, No. 11. concentrators, 12. thermal-collecting tubes, 2. supports, 3. secondary condensers, 121. outer tubes, 122. inner tube, 4. solar energy tracking devices.
Embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These accompanying drawings are simplified schematic diagram, only with Illustration illustrates the basic structure of the present invention, therefore it only shows the composition relevant with the present invention.
Embodiment 1
As shown in Fig. 2 a kind of rotational paraboloid mirror enhancing rotational paraboloid mirror point focusing solar energy collecting dress Put, including:Heat collector 1, secondary condenser 3 and support 2
Heat collector 1 includes a concentrator 11 and thermal-collecting tube 12, and a concentrator 11 is circular Fresnel speculum, the circle Shape fresnel reflecting mirror has focus point;
Secondary condenser 3 is rotational paraboloid mirror, and the secondary condenser 3 has focus point;
Thermal-collecting tube 12 is located between a concentrator 11 and secondary condenser 3, and thermal-collecting tube 12 is in and once gathered simultaneously The focal spot of light device 11 and secondary condenser 3, the carrying of thermal-collecting tube 12 has energy absorbent medium;
Support 2 is used for concentrator 11 of support, secondary condenser 3 and thermal-collecting tube 12.
A kind of rotational paraboloid mirror enhancing circular Fresnel speculum point focusing solar collecting device of the present invention, Its light path as shown in figure 1, be radiated on the circular Fresnel speculum of a concentrator 11 first in parallel rays, and light passes through The focusing of the circular Fresnel speculum of concentrator 11, is gathered in thermal-collecting tube 12, and the light transmitted through thermal-collecting tube 12 reaches two The light of receiving is converted into directional light by secondary concentrator 3, secondary condenser 3, and the circle for being directly incident on a concentrator 11 is luxuriant and rich with fragrance Nie Er speculums, are focused on again, until light is completely absorbed.
Embodiment 2
As shown in figure 4, a kind of circular Fresnel speculum enhancing rotational paraboloid mirror point focusing solar energy collecting dress Put, including:Heat collector 1, secondary condenser 3 and support 2
Heat collector 1 includes a concentrator 11 and thermal-collecting tube 12, and a concentrator 11 is circular Fresnel speculum, the circle Shape fresnel reflecting mirror has focus point;
Secondary condenser 3 is circular Fresnel speculum, and the secondary condenser 3 has focus point;
Thermal-collecting tube 12 is located between a concentrator 11 and secondary condenser 3, and thermal-collecting tube 12 is in and once gathered simultaneously The focal spot of light device 11 and secondary condenser 3, the carrying of thermal-collecting tube 12 has energy absorbent medium;
Support 2 is used for concentrator 11 of support, secondary condenser 3 and thermal-collecting tube 12.
A kind of circular Fresnel speculum enhancing circular Fresnel speculum point focusing solar collecting device of the present invention, Its light path as shown in figure 3, be radiated on the circular Fresnel speculum of a concentrator 11 first in parallel rays, and light passes through The focusing of the circular Fresnel speculum of concentrator 11, is gathered in thermal-collecting tube 12, and the light transmitted through thermal-collecting tube 12 reaches two The light of receiving is converted into directional light by secondary concentrator 3, secondary condenser 3, and the circle for being directly incident on a concentrator 11 is luxuriant and rich with fragrance Nie Er speculums, are focused on again, until light is completely absorbed.
In a kind of embodiment, thermal-collecting tube 12 is elliposoidal, spherical or square.In this embodiment, The section of thermal-collecting tube 12 is spherical, and has the pipeline of carrying energy absorbent medium, including feed pipe 123 and discharge nozzle 124, on the one hand pipeline is used for carrying energy absorbent medium, on the other hand for supporting thermal-collecting tube 12, it is in an optically focused The focal spot of device 11 and secondary condenser 3.
In a kind of embodiment, the solar collecting device also includes solar energy tracking device 4.It is primarily used to Sunshine is tracked, solar collecting device is in optimal photothermal deformation state all the time.Its concrete form can be any existing Some solar energy tracking devices, as long as tracking sunshine can be met.
In a kind of embodiment, as shown in figure 5, thermal-collecting tube 12 is vacuum tube, including outer tube 121 and inner tube 122, the interlayer between outer tube 121 and inner tube 122 is vacuum, the carrying energy absorbent medium of inner tube 122.Wherein feed pipe 123 and discharge nozzle 124 sequentially pass through outer tube 121 and inner tube 122 respectively, reach inside inner tube 122.Wherein feed pipe 123 and the angle of discharge nozzle 124 be 0 ° -180 °, what is selected in this specific embodiment is 0 °.It is of course possible to according to actual feelings The angle of condition, feed pipe 123 and discharge nozzle 124 is selected between 30 °, 45 °, 60 °, 90 °, 120 °, 135 ° and 150 °.
Specifically, outer tube 121 and inner tube 122 are light-transmission tube.
Preferably, the material of outer tube 121 is glass, PMMA or PC.
Preferably, the material of inner tube 122 is glass, PMMA or PC.
Using the above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, relevant staff is complete Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention Property scope is not limited to the content on specification, it is necessary to its technical scope is determined according to right.

Claims (7)

1. a kind of circular Fresnel type solar collecting device of point focusing twice, it is characterised in that including:It is heat collector, secondary poly- Light device and support,
The heat collector includes a concentrator and thermal-collecting tube, and a concentrator is circular Fresnel speculum, circle phenanthrene alunite You have focus point by speculum;
The secondary condenser is rotational paraboloid mirror or circular Fresnel speculum, and the secondary condenser, which has, to be focused on Point;
The thermal-collecting tube is located at No. one time between concentrator and secondary condenser, and thermal-collecting tube is in a concentrator and two simultaneously The focal spot of secondary concentrator, thermal-collecting tube carrying has energy absorbent medium;
The support is used for concentrator of support, secondary condenser and thermal-collecting tube.
2. a kind of circular Fresnel type solar collecting device of point focusing twice as claimed in claim 1, it is characterised in that: The thermal-collecting tube is elliposoidal, spherical or square.
3. a kind of circular Fresnel type solar collecting device of point focusing twice as claimed in claim 1 or 2, its feature exists In:The thermal-collecting tube is vacuum tube, including outer tube and inner tube, the interlayer between outer tube and inner tube are vacuum, internal layer Pipe carrying energy absorbent medium.
4. a kind of circular Fresnel type solar collecting device of point focusing twice as claimed in claim 3, it is characterised in that: The outer tube and inner tube are light-transmission tube.
5. a kind of circular Fresnel type solar collecting device of point focusing twice as claimed in claim 4, it is characterised in that: The outer tube material is glass, PMMA or PC.
6. a kind of circular Fresnel type solar collecting device of point focusing twice as described in claim 4 or 5, its feature exists In:The inner tube material is glass, PMMA or PC.
7. a kind of circular Fresnel type solar collecting device of point focusing twice as claimed in claim 1, it is characterised in that: Also include solar energy tracking device.
CN201710363000.1A 2017-05-18 2017-05-18 The circular Fresnel type solar collecting device of point focusing twice Pending CN107166757A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201710363000.1A CN107166757A (en) 2017-05-18 2017-05-18 The circular Fresnel type solar collecting device of point focusing twice
PCT/CN2018/087466 WO2018210331A1 (en) 2017-05-18 2018-05-18 Double point-focusing solar energy collection apparatus
US16/614,375 US11692740B2 (en) 2017-05-18 2018-05-18 Double point-focusing solar energy collection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710363000.1A CN107166757A (en) 2017-05-18 2017-05-18 The circular Fresnel type solar collecting device of point focusing twice

Publications (1)

Publication Number Publication Date
CN107166757A true CN107166757A (en) 2017-09-15

Family

ID=59815461

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710363000.1A Pending CN107166757A (en) 2017-05-18 2017-05-18 The circular Fresnel type solar collecting device of point focusing twice

Country Status (1)

Country Link
CN (1) CN107166757A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018210331A1 (en) * 2017-05-18 2018-11-22 常州大学 Double point-focusing solar energy collection apparatus
WO2018210330A1 (en) * 2017-05-18 2018-11-22 常州大学 Double-line focusing solar energy collection apparatus
CN113719004A (en) * 2021-10-11 2021-11-30 中建五局装饰幕墙有限公司 Novel secondary focusing photo-thermal phase change energy storage double-layer glass curtain wall module

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201352013Y (en) * 2008-11-25 2009-11-25 戴建国 Novel solar light and heat collecting system
CN101660845A (en) * 2009-09-07 2010-03-03 东南大学 Secondary reflection light gathering and heat collecting device with compound curved surface
CN104990286A (en) * 2015-06-25 2015-10-21 上海理工大学 Composite paraboloid solar collector
CN106123365A (en) * 2016-08-11 2016-11-16 南京索乐优节能科技有限公司 Linear Fresnel reflective solar heat collector in conjunction with glass sunlight house
CN106288440A (en) * 2016-09-13 2017-01-04 苏州热工研究院有限公司 A kind of Salar light-gathering structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201352013Y (en) * 2008-11-25 2009-11-25 戴建国 Novel solar light and heat collecting system
CN101660845A (en) * 2009-09-07 2010-03-03 东南大学 Secondary reflection light gathering and heat collecting device with compound curved surface
CN104990286A (en) * 2015-06-25 2015-10-21 上海理工大学 Composite paraboloid solar collector
CN106123365A (en) * 2016-08-11 2016-11-16 南京索乐优节能科技有限公司 Linear Fresnel reflective solar heat collector in conjunction with glass sunlight house
CN106288440A (en) * 2016-09-13 2017-01-04 苏州热工研究院有限公司 A kind of Salar light-gathering structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018210331A1 (en) * 2017-05-18 2018-11-22 常州大学 Double point-focusing solar energy collection apparatus
WO2018210330A1 (en) * 2017-05-18 2018-11-22 常州大学 Double-line focusing solar energy collection apparatus
CN113719004A (en) * 2021-10-11 2021-11-30 中建五局装饰幕墙有限公司 Novel secondary focusing photo-thermal phase change energy storage double-layer glass curtain wall module

Similar Documents

Publication Publication Date Title
CN101806502B (en) Solar energy collecting system of heliostat
CN107166755A (en) Secondary condensation face strengthens fresnel reflecting mirror line-focusing solar collection device
CN107178915A (en) The paraboloid of revolution type solar collecting device of point focusing twice
CN104456980B (en) A kind of secondary condensation reflection and transmission type parabolic trough type solar thermal collector
CN106849859A (en) A kind of full spectrum of solar energy utilizes device
CN107166757A (en) The circular Fresnel type solar collecting device of point focusing twice
KR100935921B1 (en) Sunlight collection solar concentrator
CN107166760A (en) Secondary condensation face strengthens parabolic mirror line-focusing solar collection device
CN102954601A (en) Pantile solar concentration heat collector
CN101699191A (en) Integrally packaged type solar heat collector with combined curved surface for light collection and vacuum tube for heat collection
CN106123365A (en) Linear Fresnel reflective solar heat collector in conjunction with glass sunlight house
CN111271882A (en) Long-life spectrum light splitting and light condensing integrated photovoltaic thermal module, system and method
CN105241081B (en) Composite parabolic optically focused collection radiator with thermal-arrest on daytime and nocturnal radiation refrigerating function
CN103673320A (en) Solar heat collection device
CN107024007A (en) Based on the multifocal Fresnel photo-thermal concentration structure of nonimaging optics subregion and method
CN208567166U (en) A kind of photo-thermal power generation solar collecting device
CN111238060A (en) High-temperature solar heat collecting tube with secondary condenser and trough type heat collector thereof
CN109520145A (en) A kind of straight way type solar collector tube and its heat collector
CN104596125B (en) Cavity solar receiver with lighting cover
KR102358978B1 (en) Parabolic trough concentrator type solar thermal energy system having concentrated photovoltaic
CN209230036U (en) A kind of straight way type solar collector tube and its heat collector
CN111854178B (en) Secondary light-gathering reflection-uniform heat flow groove type solar heat collector
CN201811461U (en) High-efficiency heat pipe type internal light-focusing solar vacuum heat-collecting pipe
WO2018210330A1 (en) Double-line focusing solar energy collection apparatus
KR102358975B1 (en) Parabolic trough concentrator type solar thermal energy system capable of tracking solar using camera image

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20170915

RJ01 Rejection of invention patent application after publication