Classifications

• • 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
  • H02S40/20—Optical components
  • H02S40/22—Light-reflecting or light-concentrating means
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
  • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
  • G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
  • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
  • G02B19/0038—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light
  • G02B19/0042—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with ambient light for use with direct solar radiation
• • 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
• • 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
  • 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
  • H02S40/12—Means for removing snow
• • 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
  • H02S40/40—Thermal components
  • H02S40/42—Cooling means
• • 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
  • H02S40/40—Thermal components
  • H02S40/42—Cooling means
  • H02S40/425—Cooling means using a gaseous or a liquid coolant, e.g. air flow ventilation, water circulation
• • 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
  • H02S40/40—Thermal components
  • H02S40/44—Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
  • H10F77/00—Constructional details of devices covered by this subclass
  • H10F77/40—Optical elements or arrangements
  • H10F77/42—Optical elements or arrangements directly associated or integrated with photovoltaic cells, e.g. light-reflecting means or light-concentrating means
  • H10F77/484—Refractive light-concentrating means, e.g. lenses
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
  • H10F77/00—Constructional details of devices covered by this subclass
  • H10F77/40—Optical elements or arrangements
  • H10F77/42—Optical elements or arrangements directly associated or integrated with photovoltaic cells, e.g. light-reflecting means or light-concentrating means
  • H10F77/488—Reflecting light-concentrating means, e.g. parabolic mirrors or concentrators using total internal reflection
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10N10/00—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects
  • H10N10/10—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects
  • H10N10/17—Thermoelectric devices comprising a junction of dissimilar materials, i.e. devices exhibiting Seebeck or Peltier effects operating with only the Peltier or Seebeck effects characterised by the structure or configuration of the cell or thermocouple forming the device
• • 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
  • Y02E10/52—PV systems with concentrators
• • 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
  • Y02E10/60—Thermal-PV hybrids

Definitions

• the present invention relates to the field of optical component technology and clean energy technology, and in particular to a Fresnel concentrating device containing a Fresnel lens and its use in a concentrating solar energy system.
• the concentrating device of the existing solar system also causes a problem in height because the height of the concentrating device generally increases as its concentrating ratio increases.
• a Fresnel concentrating device includes: first and second Fresnel lens layers, each lens layer including at least one concentrating Fresnel lens; and a continuous cylindrical shape a light guiding layer having a straight cylindrical shape, the first and second Fresnel lens layers are respectively disposed at two ends of the straight cylindrical shape, and the straight cylindrical light guiding layer is used for guiding the light from the first Fresnel lens layer downward To the second Fresnel lens layer.
• a concentrating solar energy system comprising a Fresnel concentrating device and at least one light energy utilizing device according to the present invention, the light receiving surface being disposed behind the Fresnel concentrating device The light path.
• Fresnel concentrating device of the present invention two Fresnel lens layers are used to respectively converge light, and a straight tubular light guiding layer is used in the middle to assist in guiding light from the upper layer to the lower layer, so that the concentrating device can not only It has a wide range of incident angles and can achieve a large concentration ratio at a lower height, avoiding the dependence on the Japanese system.
• FIG. 1 is a schematic view of a Fresnel concentrating device of Embodiment 1;
• FIG. 2 is a schematic view of a Fresnel concentrating device of Embodiment 2;
• FIG. 3 is a schematic view of a concentrating solar energy system of Embodiment 3; [0012] FIG.
• FIG. 4 is a schematic view of a concentrating solar energy system of Embodiment 4.
• FIG. Fig. 1 is a schematic view showing the structure of the apparatus after longitudinal decomposition, comprising a first Fresnel lens layer 110, a straight cylindrical light guiding layer 120 and a second Fresnel lens layer 130.
• the Fresnel lens layer in the present invention uses a Fresnel lens as an optical element, and each lens layer includes at least one concentrating Fresnel lens.
• the Fresnel lens is a thin lens, and this type of lens has the advantages of being thin and easy to mass-produce.
• a "concentrating" (or "astigmatic") Fresnel lens refers to functionally concentrating light (or diffusing out of the optical center) toward the optical center of the lens.
• the Fresnel lens has a tooth surface that is usually derived from a convex lens surface (or a concave lens surface).
• the so-called "linear" Fresnel lens means that the focus center of the lens is a line instead of being concentrated at one point.
• the tooth flanks of a linear Fresnel lens may originate from a concave (or convex) cylindrical face, or a concave (or convex) polynomial cylinder.
• the Fresnel lens may be a single-sided Fresnel lens having a flat surface on one side of the tooth surface, or a double-sided Fresnel lens having a tooth surface on both sides.
• Each tooth surface of each Fresnel lens may be a simple lens surface containing only one Fresnel unit, or a composite lens surface composed of a plurality of Fresnel units, thereby forming a composite Fresnel lens.
• the first and second Fresnel lens layers in this embodiment are respectively formed by a single condensing type simple Fresnel lens 111, 131.
• the first and second Fresnel lens layers may also adopt a more complicated structure, for example, may include a plurality of Fresnel lenses, or adopt a double-sided Fresnel lens, or use a composite Fresnel lens.
• a multifocal Fresnel lens can be employed in at least one of the lens layers.
• the so-called multifocal Fresnel lens is divided into different regions according to the distance from the central optical axis, wherein the region farther from the central optical axis has a shorter focal length and a region closer to the central optical axis, Longer focal length.
• the so-called longer focal length includes the case where the focal length is infinite, in which case the corresponding region is, for example, a hollowed out region, or is formed of a planar transparent material.
• At least one concentrating Fresnel lens of the first or second Fresnel lens layer may adopt a linear concentrating Fresnel lens, wherein each linear lens
• the focus centerline is substantially perpendicular to the optical axis (or central axis of the entire concentrating device, ie, the direction in which the sunlight is incident vertically).
• the focusing centerlines of the different layers of the linear concentrating Fresnel lens are perpendicular to each other, thereby realizing a two-dimensional (ie, having a single central optical axis and focus) with two linear Fresnel lens layers. Fresnel lens.
• This structure will help achieve a uniform light intensity distribution in the focal plane, or a complex optical design through a combination of easy-to-machine lenses.
• the shape of the straight tubular light guiding layer 120 is a straight cylinder shape, and the first and second Fresnel lens layers are respectively disposed at two ends of the straight cylindrical shape, and the straight cylindrical light guiding layer is used for coming from the first Fresnel The light from the lens layer is directed downward to the second Fresnel lens layer.
• the wall of the straight cylindrical light guiding layer is perpendicular to the two lens layers (i.e., substantially coincident with the optical axis direction of the entire concentrating device), which may be transparent, or may be provided with a mirror surface on at least a portion of the inner wall.
• Various optical designs can be used to realize the light guiding function of the straight tubular light guiding layer, for example: the mirror surface of the inner wall can be used to guide light; or the wall of the straight tubular light guiding layer and the first and second Philippine
• the Neel lens layer together encloses a closed first space, and the first space is filled with a high-pressure gas or an optical gas to assist in deflecting the incident light downward.
• the so-called optical gas refers to a refractive index greater than 1 at a standard atmospheric pressure. Or gas; or other optical elements that assist in the deflection of the light are disposed in the inner space of the straight light guiding layer.
• the inner wall of the cylinder is a mirror surface structure, and the closed first space is filled with an optical gas 121 , and the incident light LL is concentrated by the convergence of the top lens layer and the deflection of the straight tubular light guiding layer. Guide the lens layer to the bottom.
• the cross section of the straight tubular light guiding layer is square, and in other embodiments, different cross sectional shapes may also be employed.
• the cross-sectional shape of the straight cylindrical shape may preferably be various regular and easy-to-manufacture shapes, for example, may be selected from the group consisting of a quadrangle, a hexagon, a circle, and the like.
• the Fresnel concentrating device of the embodiment can achieve a higher concentrating ratio and a relatively low height, and can be combined with any light energy or electromagnetic energy receiving device to form concentrating light energy or electromagnetic energy receiving.
• the system for example, is used in a concentrating solar system.
• FIG. 2 is a schematic view showing the structure of the apparatus after being longitudinally decomposed, including a first Fresnel lens layer 210, a straight tubular light guiding layer 220, a second Fresnel lens layer 230 and a tapered light guiding layer 240.
• the first Fresnel lens layer 210 preferably employs a multi-focal Fresnel lens 211 whose surface is divided into two concentric regions of similar shape, wherein the region is further away from the central optical axis. (peripheral area A01), having a shorter focal length, a region closer to the central optical axis (center area A02), having a longer focal length;
• the second Fresnel lens layer 230 preferably employs a multi-focal Fresnel lens 231 having a Fresnel lens surface only in the peripheral region B01, and the central region B02 is hollowed out; [0030] 3.
• the straight tubular light guiding layer 220 further includes an astigmatism tube 222, the wall of which is formed by a linear astigmatic Fresnel lens, the length extending direction of the astigmatism tube is consistent with the straight tubular light guiding layer, and is set In the inner space of the straight tubular light guiding layer, the focusing center line of each linear astigmatic Fresnel lens is perpendicular to the length extension direction of the astigmatism cylinder.
• the astigmatism tube 222 can scatter the incident light toward the lower end of the straight tube to enhance the ability of the straight light guiding layer to shift the incident light from the optical axis, which is beneficial for the subsequent optical component to finally guide the light LL to the light energy utilization.
• the cross-sectional shape of the astigmatism cylinder may be the same as or different from the cross-sectional shape of the cylinder wall of the straight cylindrical light guiding layer surrounding the outside thereof, and a square shape is employed in this embodiment.
• the tapered light guiding layer 240 is disposed under the second Fresnel lens layer 230, and includes at least one reflective conical light guiding tube 241, the inner wall of which is wholly or at least partially mirrored, and the top opening is compared The large bottom opening is smaller, and the light concentrated by the second Fresnel lens layer is incident from the top of the tapered light guide and guided to the bottom.
• the cross-sectional shape of the tapered light guide tube may be a quadrangle, a hexagon, a circle, or the like.
• the bottom of the tapered light guide tube 241 may be closed so as to be provided with a light energy utilization device thereon, thereby forming a concentrating solar energy system, or a light energy utilization device may be used to close the tapered light guide tube. bottom.
• a light energy utilization device may be used to close the tapered light guide tube. bottom.
• a single-sided light-receiving light energy utilization device such as a single-sided light-receiving photovoltaic panel 250, may be disposed at the bottom of the tapered light guide tube, and its light-receiving surface is oriented. The top of the tapered light guide.
• photovoltaic panel as used in the present invention generally refers to various types of photoelectric conversion devices, such as photovoltaic panels made of various materials, photovoltaic thin films, quantum dot photovoltaic materials, and the like.
• FIG. 3 is a schematic structural view of the system after assembly, including a first Fresnel lens layer 310, a straight tubular light guiding layer 320, a second Fresnel lens layer 330, a tapered light guiding layer 340, and a light energy utilization device 350. .
• the multi-focal Fresnel lens 311 employed in the first Fresnel lens layer 310 has different shapes of the two regions divided by the surface, the central region C02 is circular, and the peripheral region C01 is square. This reflects the dependence The flexibility of the structure according to the invention in optical path design and shape design.
• the light energy utilization device 350 in the present embodiment is of a composite type, that is, includes a thermoelectric conversion device 352 in addition to the photovoltaic panel 351.
• the thermoelectric conversion device can be disposed on the heat conduction path of the photovoltaic panel to dissipate heat to further convert the thermal energy into electrical energy during the heat dissipation of the photovoltaic panel.
• the thermoelectric conversion device can employ, for example, a semiconductor device having a thermoelectric effect.
• the photovoltaic panel 351 and the thermoelectric conversion device 352 are separately disposed, wherein the photovoltaic panel 351 is disposed in the tapered light guide tube, and is fixed on the tapered light guide tube by the heat conduction support member 342.
• the bottom of the tapered light guide can be closed by the mirror surface 343.
• the thermoelectric conversion device 352 is thermally conductively attached to the back side of the bottom of the tapered light guide.
• the photovoltaic panel 351 may preferably employ a double-sided light-receiving photovoltaic panel to improve light energy utilization.
• thermoelectric conversion device may also be thermally conductively attached to the single-sided light receiving device.
• the back side of the photovoltaic panel allows the composite light energy utilization device to be formed as a single unit.
• FIG. 4 Another embodiment of a concentrating solar energy system in accordance with the present invention can be seen in FIG. 4 is a schematic structural view of the system after being longitudinally decomposed, including a first Fresnel lens layer 410, a straight tubular light guiding layer 420, a second Fresnel lens layer 430, a tapered light guiding layer 440, and light energy.
• the device 450 and the bottom basin 460 are utilized.
• This embodiment illustrates an integrated implementation of the system in accordance with the present invention to facilitate fabrication and lower cost.
• the Fresnel concentrating device according to the present invention may be separately integrated after being separately fabricated; or each layer may be composed of a plurality of units, each layer being integrated and then integrally combined; or a partial layer An integrated multi-cell structure is used, and part of the layers are formed as a single component.
• the present embodiment shows a mixed case in which:
• the first Fresnel lens layer 410 includes a plurality of concentrating Fresnel lenses 411 arranged in an array, each lens 411 may be a simple Fresnel lens, or a composite Fresnel lens, the entire lens
• the layer 410 may be formed by a combination of a plurality of cells, or may be a whole, and each lens 411 is divided by a pattern of its tooth faces;
• the second Fresnel lens layer 430 includes a plurality of concentrating Fresnel lenses 431 arranged in an array, each of which is a multi-focus Fresnel lens hollowed out in the central region;
• the straight tubular light guiding layer 420 may be formed by a plurality of straight cylindrical light guide tubes (not shown) arranged in an array, each of the straight cylindrical light guiding tubes corresponding to a pair of lenses 411 and 431, or may be a whole Large light guide straight;
• the tapered light guiding layer 440 includes a plurality of tapered light guiding tubes 441 arranged in an array, and accordingly, the light energy utilizing device 450 includes a plurality of photovoltaic panels 451 disposed at the bottom of the tapered light guiding tubes 441, respectively. .
• a bottom basin 460 is preferably included, which is disposed under the tapered light guiding layer 440, and the tapered light guide.
• the layers together form a closed third space, and the third space can accommodate working fluids, which are thermally connected to the photovoltaic panel 451.
• the working substance may preferably be a substance having a large heat capacity, which may be a solid or a fluid, and the heat absorbed by the working medium may be supplied to the outside for further heat conduction or circulation through the working medium.
• the fluid working fluid used may be selected from the group consisting of: water, oil, refrigerant, compressed gas, and the like.
• the inlet and outlet for the inflow and outflow of the working fluid may be further provided on the bottom basin.
• the circulating system of the liquid working fluid can be either open or closed, depending on the type of working medium and the desired form of thermal energy utilization.
• a thermoelectric conversion device (not shown) may be further disposed on the heat conduction path between the photoelectric conversion device and the working medium.
• the thermoelectric conversion device may be disposed on the back surface of the bottom of the tapered light guide tube 441 and immersed in In the working medium.
• the present embodiment further includes a piezoelectric vibrator 470 including a piezoelectric vibrating piece 471 and a driving circuit thereof (not shown).
• the piezoelectric vibrating piece 471 is mechanically coupled to the first Fresnel lens layer 410 (e.g., to the outside of the straight tubular light guiding layer 420) to drive it to vibrate.
• the vibrator can be used, for example, for automatic cleaning of the light receiving surface of the concentrating device, or for snow removal, deicing, and the like.
• the piezoelectric vibrating piece may be fixed at other positions, which is not limited in the present invention.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Sustainable Development (AREA)
• Toxicology (AREA)
• Photovoltaic Devices (AREA)
• Optical Couplings Of Light Guides (AREA)
• Optical Elements Other Than Lenses (AREA)

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Cited By (3)

Citations (4)

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• 2017
  • 2017-07-03 WO PCT/CN2017/091414 patent/WO2019006579A1/zh not_active Ceased
  • 2017-07-03 KR KR1020207002818A patent/KR20200031116A/ko not_active Ceased
  • 2017-07-03 US US16/624,931 patent/US20210336581A1/en not_active Abandoned
  • 2017-07-03 EP EP17916539.4A patent/EP3648179A4/en not_active Withdrawn
  • 2017-07-03 BR BR112019027997-0A patent/BR112019027997A2/pt not_active Application Discontinuation
  • 2017-07-03 AU AU2017422421A patent/AU2017422421B2/en not_active Ceased
  • 2017-07-03 CN CN201780091632.5A patent/CN110741481A/zh active Pending
  • 2017-07-03 MY MYPI2019007567A patent/MY194521A/en unknown
  • 2017-07-03 CA CA3068080A patent/CA3068080A1/en not_active Abandoned
  • 2017-07-03 JP JP2019571545A patent/JP6916315B2/ja not_active Expired - Fee Related

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