NL2027172A - Photovoltaic panel structure capable of reducing influence of dust accumulation and method for designing photovoltaic panel structure - Google Patents
Photovoltaic panel structure capable of reducing influence of dust accumulation and method for designing photovoltaic panel structure Download PDFInfo
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- NL2027172A NL2027172A NL2027172A NL2027172A NL2027172A NL 2027172 A NL2027172 A NL 2027172A NL 2027172 A NL2027172 A NL 2027172A NL 2027172 A NL2027172 A NL 2027172A NL 2027172 A NL2027172 A NL 2027172A
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- photovoltaic panel
- panel structure
- photovoltaic
- particles
- dust accumulation
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- 239000000428 dust Substances 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000009825 accumulation Methods 0.000 title claims abstract description 16
- 239000002245 particle Substances 0.000 claims abstract description 40
- 230000005855 radiation Effects 0.000 claims abstract description 18
- 239000011521 glass Substances 0.000 claims abstract description 10
- 238000004364 calculation method Methods 0.000 claims abstract description 7
- 238000005315 distribution function Methods 0.000 claims abstract description 5
- 238000004088 simulation Methods 0.000 claims abstract description 4
- 238000009434 installation Methods 0.000 claims description 3
- 238000011160 research Methods 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims 1
- 235000012054 meals Nutrition 0.000 claims 1
- 238000010248 power generation Methods 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 6
- 230000000704 physical effect Effects 0.000 abstract description 4
- 238000001228 spectrum Methods 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000004005 microsphere Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000011835 investigation Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 241001137251 Corvidae Species 0.000 description 1
- 235000006679 Mentha X verticillata Nutrition 0.000 description 1
- 235000002899 Mentha suaveolens Nutrition 0.000 description 1
- 235000001636 Mentha x rotundifolia Nutrition 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- GVVPGTZRZFNKDS-JXMROGBWSA-N geranyl diphosphate Chemical compound CC(C)=CCC\C(C)=C\CO[P@](O)(=O)OP(O)(O)=O GVVPGTZRZFNKDS-JXMROGBWSA-N 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 235000015108 pies Nutrition 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/11—Complex mathematical operations for solving equations, e.g. nonlinear equations, general mathematical optimization problems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/10—Cleaning arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/042—PV modules or arrays of single PV cells
- H01L31/048—Encapsulation of modules
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The present invention relates to a photovoltaic panel structure capable of reducing influence 5 of dust accumulation and a method for designing a photovoltaic panel structure. The method comprises: obtaining a dust accumulation sample, and measuring a particle size distribution function f(R) and a relative dielectric constant thereof; calculating a near field of particles subjected to electromagnetic waves by a Mie scattering theory, and the formula is as follows: obtaining scattered field data of particles with different particle sizes (R) under solar radiation with 10 a wavelength of A by simulation calculation, finding a corresponding distance r when field intensity is greater than a fixed value b, establishing a corresponding fitting function, and thereby calculating an average distance; and selecting ; as the thickness of photovoltaic glass, and assembling the photovoltaic panel structure accordingly. The present invention designs a photovoltaic glass structure by obtaining the physical property of local dust accumulation and the 15 power spectrum of solar radiation in advance, so as to realize high-efficiency power generation of photovoltaic cells.
Description
ACCUMULATION AND METHOD FOR DESIGNING PHOTOVOLTAIC PANEL STRUCTURE Technical Field The present invention relates to a photovoltaic panel structure capable of reducing influence of dust accumulation and a method for designing a photovoltaic panel structure. Background Clean, cheap and reliable energy has always been the cornerstone of social prosperity and economic growth, and the development of new energy is an irreversible trend in the world today. As the most mature clean energy technology, solar photovoltaic power generation plays a vital role in solving the problem of power shortage in any country. Effective prediction of photovoltaic panel generation efficiency plays an important role in grid-connected consumption of new energy; whereas under the influence of meteorological environment, accurate prediction of the temperature and effective solar radiation intensity of a photovoltaic panel directly affects the accuracy of relevant results. A desertification region is an advantageous region for developing large-scale photovoltaic power stations, but the atmospheric environment with wind, sand, strong radiation and large temperature difference brings a series of new problems to the normal operation of a photovoltaic system. Therefore, the research on the influence of desert environment on solar power generation devices has attracted wide attention.
Aerosol particles may deposit on the surface of a photovoltaic solar panel and change the light transmittance of a protective layer of a photovoltaic cell, thus affecting the effective incident solar radiation intensity of the photovoltaic cell. Experimental study shows that: for a glass panel with an inclination angle of 45°, the light transmittance is decreased by 30% after 30 days of exposure in a rainless season, and is decreased with the increase of a cleaning cycle (as more sand and dust will deposit). It can be seen that sand and dust deposition has become a main factor affecting the economical and high-efficiency operation of a photovoltaic power station in the desertification region. Therefore, it is a research hotspot in the current field to explore a scientific dust removal method, design a better photovoltaic panel structure and effectively reduce the influence of dust accumulation.
Summary The present invention discloses a new photovoltaic panel structure which can effectively reduce the negative influence of dust accumulation on a photovoltaic panel and can realize high- efficiency power generation by utilizing the special optical phenomenon of dust accumulation. The present invention is mainly to design a photovoltaic glass structure by obtaining the physical property of local dust accumulation and the power spectrum of solar radiation in advance, so as to realize efficient power generation of photovoltaic cells.
The present invention provides a method for designing a photovoltaic panel structure, comprising: 1) Obtaining a dust accumulation sample, and measuring a particle size distribution function f(R) and a relative dielectric constant thereof, wherein R is a particle size, and the relative dielectric constant is obtained by an open cavity method and denoted as €; 2) Calculating a near field of particles subjected to electromagnetic waves by a Mie scattering theory, and the formula in a spherical coordinate system (r, 8%) is as follows: i 2 | er | : ES x E Ve Ey ah {15 PL kr kr | Ey 1 u ixexplik(r - 2] S00 I Li | Fe | ë ke 0 SLE, | ${2,6}= srl Abr JS LG} lg T+, } n=1, 2 3... TT and Th i sv, - nin +1 WR who FY 3 ggd 1) EE Ta 3 ; ; een can be solved iteratively by the following formula: x, = nl cösd.
Ka” i” Tes) T= 20 aH em” etl} Ser gl | Hel TTo=0; TT1=1; TT2=3co88; T9=0; T:=cos8; and T:=3cos(28) x=KR, k is the number of the electromagnetic waves, k=2TT/ÀA, A is the wavelength of the electromagnetic waves, m = Jer , r is the distance from an investigation point to the center of the particles; and Ees and Ee are respectively a component of an incident wave in the spherical coordinate system. ow DL Lg Cin (nl) Tm malady COP 0 re} IES BAG nt ARE LAL LN] In the above formula, jn(x) and h(x) are respectively a spherical Bessel function of the first kind and a spherical Bessel function of the third kind, and [xjn(x;] means taking the derivative of the function in brackets with respect to x. 3) Obtaining scattered field data of particles with different particle sizes (R) under solar radiation with a wavelength of A by simulation calculation using formula (1), finding a corresponding distance r when field intensity is greater than a fixed value b, establishing a corresponding fitting function r=g(R), and thereby calculating an average distance; and the calculation formula is as follows: es SE (2)
Wherein b is any constant greater than 1, and represents an enhancement multiple of the scattered field of particles in a direct radiation condition that can be guaranteed by the distance + obtained in formula (2), i.e., the multiple of the field intensity perceived by a photovoltaic cell and incident solar radiation; and 3 (4) Selecting ; as the thickness of photovoltaic glass, and assembling the photovoltaic panel structure accordingly.
The method further comprises: (5) Determining the time for manual intervention in dust removal by measuring the geographic latitude and longitude of an installation region, and the specific steps are as follows: assuming that the geographic latitude of the region is §, a solar declination is 0, and a solar hour angle is t, then a solar elevation angle H is calculated by the following formula: sinH=singsind+cos@cosdcost Assuming that the median of particle sizes in this region is Ru, wherein Ru is output by a laser granularity meter in step 1, and the influence distance of the shadow of a single particle is L, then Li=2Rwmctg{Hs), L2=2Rwmctg{H+s), and the average of the two is used as an index, i.e., Lo=(L++L2)/2; Wherein Hs and H+s represent the time points of grid connection.
The present invention further provides a photovoltaic panel structure obtained by the method.
The present invention designs a photovoltaic glass structure by obtaining the physical property of local dust accumulation and the power spectrum of solar radiation in advance, so as to realize high-efficiency power generation of photovoltaic cells. Description of Drawings Fig. 1 shows a comparison of incident radiation intensities when the thickness of a photovoltaic panel is respectively 3 millimeter and 1.5 millimeter with respect to common dust particles having an average size of 20 microns. Detailed Description The following embodiments may enable those skilled in the art to fully understand the present invention, but do not limit the present invention in any way.
The present invention is mainly to design a photovoltaic glass structure by obtaining the physical property of local dust accumulation and the power spectrum of solar radiation in advance, so as to realize efficient power generation of photovoltaic cells. A main method is: 4) Obtaining a dust accumulation sample, and measuring a particle size distribution function and a relative dielectric constant (or refractive index) thereof. The particle size distribution function can be obtained by measuring the collected dust accumulation sample by a laser granularity meter; and this function is denoted as f(R), wherein R is a particle size. The relative dielectric constant thereof can be measured by relevant instruments, such as an AS2855 high-frequency dielectric constant and dielectric loss measuring system, and is denoted as ¢..
5) Calculating a near field of particles subjected to electromagnetic waves by a Mie scattering theory, and the formula is as follows: | i E J, : ES 3 Ei ~ HAY «|E ~ (1) PT kr kro Ey, 1 _ixexp Lkir-][s, 0] ] Ey 1 - Lv | . kr ” 2 0 Sy i | E, | Ca Zal ‚ n+l ; 5 x, 6 ar N mf ST + b 7 4 Ss xl Y= x ee XT / +h Eu 3 = Wherein 8 {x.8} dij GPP 3S {8 ) Lina ij GD} andn=1, 2,3. Ta and Tn can be solved iteratively by the following formula: da] 3 " a x, wl tn, - ez tn cosh Mint gl nl . me=0; TT:=1; TTe=3cos8; To=0; T:=co0588; and T2=3cos(28) x=kR, k is the number of the electromagnetic waves, k=21/A, A is the wavelength of the electromagnetic waves, m = Jz , r is the distance from an investigation point to the center of the particles.
win on mrad loeit) ang fait
EE Com mn ads ol oe {md} PIES Lat AE ASU LO A GSU Aen OPE Om (ee)? In the above formula, jn{x) and BY {x} are respectively a spherical Bessel function of the first kind and a spherical Bessel function of the third kind, and [xjh{x)]' means taking the derivative of the function in brackets with respect to x. Other theories, such as discrete dipole approximation (DDA), T-matrix and finite difference method, can also be used here to calculate the near field of particles, and the fundamental purposes are the same: to calculate the near field distribution of particles under electromagnetic radiation.
6) Obtaining scattered field data of particles with different particle sizes (R) under solar radiation with a wavelength of A by plenty of simulation calculation using formula (1), finding a corresponding distance r when field intensity is greater than a fixed value b (b> 1), establishing a corresponding fitting function r=g(R), and thereby calculating an average distance; and the calculation formula is as follows: ref" (R)g(RYAR (2) Wherein b is any constant greater than 1, and represents an enhancement multiple of the scattered field of particles in a direct radiation condition that can be guaranteed by the distance
+ Obtained in formula (2), i.e., the multiple of the field intensity perceived by a photovoltaic cell and incident solar radiation. (4) Selecting , as the thickness of photovoltaic glass, and assembling a photovoltaic panel accordingly.
5 (5) Determining the time for manual intervention in dust removal by measuring the geographic latitude and longitude of an installation region. The specific method is as follows: assuming that the geographic latitude of the region is 4, a solar declination is ò, and a solar hour angle is t, then a solar elevation angle H is calculated by the following formula: sinH=singsind+cos@cosdcost Assuming that grid connection is required during the time period between 9:00 and 17:00 every day, then solar elevation angles are obtained, which are Hg and His. Assuming that the median of particle sizes in this region is Ru (which is automatically output by a laser granularity meter in step 1), and the influence distance of the shadow of a single particle is L, then Li=2Rwmctg(Hs), L2=2Rwmctg(H:s), and the average of the two is used as an index, i.e., Lo=(L:+L2)/2. Assuming that the area of the photovoltaic panel is A, then the number of dust particles deposited thereon shall not exceed 0.25A/L2, and the corresponding average distance between particles shall be n=2/R times a particle size, which can be automatically judged by a computer image processing method after a photograph is taken. Experiments show that with respect to common dust particles having an average size of 20 microns, when the thickness of the photovoltaic panel is decreased from 3 millimeter to 1.5 millimeter, the incident radiation intensity is increased by at least 10 times. The results are shown in Fig. 1, and the vertical axis is the amplification factor. Based on the above ideas, it is also possible to artificially design transparent microspheres and install the microspheres on the photovoltaic panel to achieve the same purpose. The radius ofthe microspheres is R as described above. Those skilled in the art should understand that the above embodiments are only exemplary embodiments and may be changed, replaced and amended in a variety of ways without departing from the spirit and scope of the present application.
Claims (3)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010023178.3A CN111222084B (en) | 2020-01-09 | 2020-01-09 | Photovoltaic panel structure capable of reducing dust accumulation influence and method for designing photovoltaic panel structure |
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| NL2027172A true NL2027172A (en) | 2021-08-30 |
| NL2027172B1 NL2027172B1 (en) | 2022-03-18 |
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| CN (1) | CN111222084B (en) |
| AU (1) | AU2020104166A4 (en) |
| NL (1) | NL2027172B1 (en) |
| ZA (1) | ZA202007964B (en) |
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| CN113393046A (en) * | 2021-06-23 | 2021-09-14 | 阳光电源股份有限公司 | Photovoltaic power prediction method and application device thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20140261536A1 (en) * | 2013-03-15 | 2014-09-18 | Charles R. Buhler | Dust mitigation device and method of mitigating dust |
| US20170194906A1 (en) * | 2015-12-31 | 2017-07-06 | UKC Electronics (H.K.) Co., Ltd. | Method and system for determining time point to clean solar cell module and solar cell module system by using the same |
| WO2017143268A1 (en) * | 2016-02-17 | 2017-08-24 | Qatar Foundation For Education, Science And Community Development | Flexible dust shield |
| CN107179122B (en) * | 2017-07-07 | 2018-08-10 | 宁夏大学 | The measurement method and device of photovoltaic cell surface soil deposition and effective solar radiation |
| CN108399493A (en) * | 2018-02-02 | 2018-08-14 | 上海电气分布式能源科技有限公司 | Dust stratification causes photovoltaic power generation quantity loss forecasting method and photovoltaic module to clean judgment method |
| CN109002593A (en) * | 2018-06-27 | 2018-12-14 | 华北电力大学 | Suitable for the photovoltaic system power output emulated computation method in the case of sandstorm anomalous weather |
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| US20040060757A1 (en) * | 2002-09-26 | 2004-04-01 | James Plante | Apparatus and methods for illuminating space and illumination sources for automotive collision avoidance system |
| US8797550B2 (en) * | 2009-04-21 | 2014-08-05 | Michigan Aerospace Corporation | Atmospheric measurement system |
| MX2012013614A (en) * | 2010-05-26 | 2013-03-20 | Univ Toledo | Photovoltaic structures having a light scattering interface layer and methods of making the same. |
| US8674281B2 (en) * | 2010-08-09 | 2014-03-18 | Palo Alto Research Center Incorporated | Solar energy harvesting system using luminescent solar concentrator with distributed outcoupling structures and microoptical elements |
| CN102715046B (en) * | 2012-06-08 | 2013-11-20 | 江苏大学 | Sunlight greenhouse solar photovoltaic power generation utilization device and method |
| CN106557867B (en) * | 2016-10-19 | 2020-06-09 | 华南理工大学 | Photovoltaic power generation probability model modeling method suitable for medium and long time scale power grid analysis |
| JP6848477B2 (en) * | 2017-01-25 | 2021-03-24 | Jsr株式会社 | Optical filters and their uses |
| CN108538949A (en) * | 2017-03-03 | 2018-09-14 | 无锡马丁格林光伏科技有限公司 | A kind of back structures of thermophotovoltaic |
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- 2020-01-09 CN CN202010023178.3A patent/CN111222084B/en active Active
- 2020-12-18 AU AU2020104166A patent/AU2020104166A4/en active Active
- 2020-12-18 NL NL2027172A patent/NL2027172B1/en active
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140261536A1 (en) * | 2013-03-15 | 2014-09-18 | Charles R. Buhler | Dust mitigation device and method of mitigating dust |
| US20170194906A1 (en) * | 2015-12-31 | 2017-07-06 | UKC Electronics (H.K.) Co., Ltd. | Method and system for determining time point to clean solar cell module and solar cell module system by using the same |
| WO2017143268A1 (en) * | 2016-02-17 | 2017-08-24 | Qatar Foundation For Education, Science And Community Development | Flexible dust shield |
| CN107179122B (en) * | 2017-07-07 | 2018-08-10 | 宁夏大学 | The measurement method and device of photovoltaic cell surface soil deposition and effective solar radiation |
| CN108399493A (en) * | 2018-02-02 | 2018-08-14 | 上海电气分布式能源科技有限公司 | Dust stratification causes photovoltaic power generation quantity loss forecasting method and photovoltaic module to clean judgment method |
| CN109002593A (en) * | 2018-06-27 | 2018-12-14 | 华北电力大学 | Suitable for the photovoltaic system power output emulated computation method in the case of sandstorm anomalous weather |
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| Publication number | Publication date |
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| CN111222084A (en) | 2020-06-02 |
| NL2027172B1 (en) | 2022-03-18 |
| AU2020104166A4 (en) | 2021-03-04 |
| ZA202007964B (en) | 2021-05-26 |
| CN111222084B (en) | 2021-02-26 |
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