CN104964640B - A kind of CPC reflection efficiencies detection means and detection method - Google Patents
A kind of CPC reflection efficiencies detection means and detection method Download PDFInfo
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- CN104964640B CN104964640B CN201510413591.XA CN201510413591A CN104964640B CN 104964640 B CN104964640 B CN 104964640B CN 201510413591 A CN201510413591 A CN 201510413591A CN 104964640 B CN104964640 B CN 104964640B
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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
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Abstract
A kind of CPC reflection efficiencies detection means, including some detection units, each detection unit includes fixing shell and some sources of parallel light being embedded in fixing shell, source of parallel light institute isolychn composition source of parallel light beam in each detection unit, the spacing of the source of parallel light at most two ends is all higher than or equal to the A/F of compound parabolic concentrator in each detection unit, each detection unit is set around compound parabolic concentrator to be measured, respective source of parallel light beam is incident to the inner chamber of compound parabolic concentrator from different perspectives, present invention also offers a kind of detection method using the CPC reflection efficiencies detection means, easy can intuitively detect processing and fabricating complete before dispatching from the factory or actual use a period of time CPC reflection efficiencies.
Description
Technical field
The present invention relates to optics of solar energy detection technique field, more particularly to a kind of CPC reflection efficiencies detection means and inspection
Survey method.
Background technology
In linear fresnel solar heat collector, the reflection efficiency of compound parabolic concentrator (CPC) is directly influenced
The heat that thermal-collecting tube absorbs, very crucial to improving photo-thermal conversion efficiency, what the conversion of photo-thermal efficiency was directly affected is linear phenanthrene
The generated energy in Nie Er solar energy thermal-power-generatings power station, so as to influence the overall economy quality in power station, therefore to the measurement of CPC reflectivity particularly
It is important.Current CPC reflection efficiency is mainly calculated by numerical simulation to be carried out, and lacks effective simply and easily in-site measurement
Method and apparatus, simulation calculation can not true and accurate calculate actual processing shaping CPC reflection efficiency, what actual processing went out
The preferable CPC faces shape of CPC shapes and design has certain gap unavoidably.And be necessary in CPC practical implementations to processing system
Make to complete the CPC speculums before dispatching from the factory, or even actual use is crossed the real reflection efficiency of CPC speculums of certain time and examined
Survey.
The content of the invention
In order to overcome the shortcoming of above-mentioned prior art, filled it is an object of the invention to provide a kind of detection of CPC reflection efficiencies
Put and detection method, easy can intuitively detect processing and fabricating complete before dispatching from the factory or actual use a period of time CPC
Reflection efficiency.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of CPC reflection efficiencies detection means, including some detection units, each detection unit include the He of fixing shell 2
It is embedded in 1 isolychn composition directional light of source of parallel light in some sources of parallel light 1 in fixing shell 2, each detection unit
The spacing of the source of parallel light 1 at most two ends is all higher than or equal to the opening of compound parabolic concentrator 4 in source beam, each detection unit
Width, each detection unit is set around compound parabolic concentrator 4 to be measured, and respective source of parallel light beam is entered from different perspectives
It is incident upon the inner chamber of compound parabolic concentrator 4.
There are 37 sources of parallel light 1 in each detection unit.
The angle of divergence of source of parallel light 1 is less than 1mrad, clear aperture 10mm.
The source of parallel light 1 sends red light.
Source of parallel light 1 sets independent power control switch in each detection unit.
Each described detection unit may be contained within 360 ° of rotating devices.
Present invention also offers a kind of detection method using the CPC reflection efficiencies detection means, comprise the following steps：
The first step：Each detection unit is separately fixed at some incident angle, the source of parallel light beam is irradiated
Into the inner chamber of compound parabolic concentrator 4；
Second step：Inject behind the inner chamber, the surface hot spot spot of thermal-collecting tube in compound parabolic concentrator 43 is counted
Number, the hot spot number divided by the quantity of source of parallel light beam being emitted onto on thermal-collecting tube 3 are compound parabolic concentrator 4 in the incidence
Reflection efficiency under angle；
3rd step：Incidence angle is converted, repeats the above steps, calculates the compound parabolic concentrator under different incidence angles
4 reflection efficiency, is the reflection efficiency of detected compound parabolic concentrator 4 after arithmetic mean calculating.
The incident angle at least covers 30 °, 45 °, 60 °, 90 °, 120 °, 135 °.
Compared with prior art, the present invention uses source of parallel light beam multi-angle irradiation CPC, detects new production to simple, intuitive
CPC or using a period of time CPC reflection efficiency, with simple to operate, the characteristics of Detection results are simple and clear.
Brief description of the drawings
Fig. 1 is CPC reflection efficiencies structure of the detecting device schematic diagram of the present invention.
Fig. 2 is a kind of CPC reflection efficiencies detection method of the invention and principle of device schematic diagram.
Embodiment
Describe embodiments of the present invention in detail with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of CPC reflection efficiencies detection means, including some detection units, each detection unit includes solid
Determine 1 isolychn group of source of parallel light in shell 2 and 37 sources of parallel light 1 being embedded in fixing shell 2, each detection unit
Into source of parallel light beam, the spacing L of the source of parallel light 1 at most two ends is all higher than or equal to composite parabolic optically focused in each detection unit
The A/F d of device 4, each detection unit is set around compound parabolic concentrator 4 to be measured, by respective source of parallel light beam from
Different angles are incident to the inner chamber of compound parabolic concentrator 4.
Each detection unit may be contained within 360 ° of rotating devices, and the light source linearity that source of parallel light 1 is irradiated must be good
Good, clear aperture is as far as possible small, preferably limits the angle of divergence and is less than 1mrad, clear aperture 10mm.Any two in source of parallel light beam
Mutually parallel, light beams colors are the obvious red or yellow easily distinguished.Source of parallel light 1 sets independent electricity in each detection unit
Source controlling switch, it is therefore intended that avoid source of parallel light 1 from being irradiated to the inner chamber back reflection of compound parabolic concentrator 4 to the table of thermal-collecting tube 3
Hot spot on face there may be coincidence.
The purpose of fixing shell 2 is source of parallel light 1 being fixed up, parallel between guarantee source of parallel light beam, fixed outer
Shell 2 is fabricated by material such as aluminium alloy, plastics, iron plate etc. of light easy processing.
As shown in Fig. 2 the operation principle namely detection method of above-mentioned detection device, are comprised the following steps that：
The first step：By each detection unit of the detection means be fixed on some incident angles (30 °, 45 °, 60 °,
90 °, 120 ° or 135 °), the source of parallel light beam is irradiated in the inner chamber of compound parabolic concentrator 4.
Second step：Source of parallel light beam is irradiated into after the inner chamber of compound parabolic concentrator 4, to the surface hot spot spot of thermal-collecting tube 3
Counted, the hot spot number divided by the quantity of source of parallel light beam being irradiated on thermal-collecting tube 3 are CPC4 anti-under the incidence angle
Penetrate efficiency.
3rd step：Incidence angle is converted, repeats the above steps, calculates the compound parabolic concentrator under different incidence angles
4 reflection efficiencies, are the reflection efficiency of detected compound parabolic concentrator 4 after arithmetic mean calculating.
In the present invention, detection unit can be one or more, according to specific detection demand come quantification, quantity
, it is necessary to repeatedly adjust its position when few, and quantity it is many when, then can avoid this problem.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
It should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with scope of the claims
It is defined.
Claims (7)
1. a kind of detection method of utilization CPC reflection efficiency detection means, the CPC reflection efficiencies detection means, including it is some
Detection unit, each detection unit includes fixing shell (2) and some sources of parallel light (1) being embedded in fixing shell (2), often
The source of parallel light at most two ends in source of parallel light (1) institute isolychn composition source of parallel light beam in individual detection unit, each detection unit
(1) spacing is all higher than or equal to the A/F of compound parabolic concentrator (4), and each detection unit is combined around to be measured
Parabolic condenser (4) is set, and respective source of parallel light beam is incident into the interior of compound parabolic concentrator (4) from different perspectives
Chamber；
Characterized in that, detection method comprises the following steps：
The first step：Each detection unit is separately fixed at some incident angle, the source of parallel light beam is irradiated to multiple
In the inner chamber for closing parabolic condenser (4)；
Second step：Inject behind the inner chamber, thermal-collecting tube (3) surface hot spot spot in compound parabolic concentrator (4) is counted
Number, the hot spot number divided by the quantity of source of parallel light beam being emitted onto on thermal-collecting tube (3) are compound parabolic concentrator (4) at this
Reflection efficiency under incidence angle；
3rd step：Incidence angle is converted, repeats the above steps, calculates the compound parabolic concentrator (4) under different incidence angles
Reflection efficiency, arithmetic mean calculate after be detected compound parabolic concentrator (4) reflection efficiency.
2. CPC reflection efficiencies detection method according to claim 1, it is characterised in that the incident angle is at least covered
30 °, 45 °, 60 °, 90 °, 120 °, 135 °.
3. CPC reflection efficiencies detection means according to claim 1, it is characterised in that have 37 in each detection unit
Individual source of parallel light (1).
4. CPC reflection efficiencies detection method according to claim 1, it is characterised in that source of parallel light (1) angle of divergence is small
In 1mrad, clear aperture 10mm.
5. CPC reflection efficiencies detection method according to claim 1, it is characterised in that the source of parallel light (1) sends red
Light.
6. CPC reflection efficiencies detection method according to claim 1, it is characterised in that parallel in each detection unit
Light source (1) sets independent power control switch.
7. CPC reflection efficiencies detection method according to claim 1, it is characterised in that each described detection unit is respectively provided with
In on 360 ° of rotating devices.
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| CN104964640B true CN104964640B (en) | 2017-10-27 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105628345B (en) * | 2016-03-17 | 2017-12-08 | 范多旺 | Linear Fresnel primary event mirror reflection light enters the test equipment and method of testing of CPC rates |
| CN105571837A (en) * | 2016-03-18 | 2016-05-11 | 兰州大成聚光能源科技有限公司 | CPC convergence rate measurement device used for linear Fresnel type light concentrating system and method thereof |
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| CN104702210A (en) * | 2013-12-05 | 2015-06-10 | 中国科学院苏州纳米技术与纳米仿生研究所 | System and method for testing high-ratio concentrator photovoltaic cells |
| CN204788903U (en) * | 2015-07-14 | 2015-11-18 | 中国华能集团清洁能源技术研究院有限公司 | CPC reflection efficiency detection device |
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| CN102103034A (en) * | 2009-12-21 | 2011-06-22 | 富士迈半导体精密工业（上海）有限公司 | Optical property measuring system and method |
| CN101840067A (en) * | 2010-06-01 | 2010-09-22 | 浙江工业大学 | Modeling method of informal compound parabolic condenser based on tracepro software |
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| CN102393293A (en) * | 2011-08-29 | 2012-03-28 | 阮立山 | Fresnel solar lens detector |
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