KR20220058867A - solar power generation unit and system - Google Patents

Abstract

Disclosed are a solar power generation unit and a system thereof. The unit comprises: a solar panel generating power by light wave; and a light transfer medium including one or more optical fibers including a core facing the solar panel and having the light moving and a cladding surrounding the core, and one or more lenses injecting external light into the optical fibers. The optical fibers include: a light injection region into which the light from outside is incident, and which includes one or more light injection windows penetrating the clad and exposing the core; and a light output region including one or more light output windows facing the solar panel and penetrating the cladding and exposing the core. The present invention aims to provide a solar power generation unit and a system thereof, which are capable of generating a great volume of power in a small space.

Description

Solar power generation unit and system

One or more embodiments relate to a photovoltaic power generation unit and a photovoltaic system using light energy, and in particular, a photovoltaic light with high light use efficiency by applying a light transport medium in which a plurality of lenses are provided in a light receiving area of an optical fiber. It relates to power generation units and systems.

Solar power generation using sunlight, which is an infinite energy source, uses a panel or sheet in which a large number of solar cells are provided in a structure to which high-energy solar light is incident. The photovoltaic power generation system does not have high photoelectric conversion efficiency, and therefore a very large installation area is required for large-capacity power generation.

Sunlight has a very wide wavelength range, including the visible light range from 400 to 700 nm. The intensity of this sun is not constant for each wavelength band. Currently, high-purity crystalline silicon-based solar panels commonly used in photovoltaic power generation absorb about 90% of only the wavelength region of 500 to 850 nm, and have low efficiency or almost no absorption for other wavelengths.

The solar panel unit of the solar power generation system is divided into a direct method in which sunlight reaches the flat surface of the solar panel to directly dim the solar panel, and a light collection method in which a reflective mirror or a condensing lens is used on the solar panel. The direct method is mainly applied to solar power generation facilities installed on the roof or on the ground, but this is less efficient than the light collecting method using lenses or mirrors. A light collecting method that compensates for the shortcomings of the direct method should include a complex optical structure and a structure supporting the same. Therefore, the manufacturing cost of these conventional methods is high and the life span of the solar panel due to high light intensity cannot be avoided.

Optical fiber is an optical transmission medium used for various purposes such as optical communication, solar power generation, plant cultivation, and the like. Light transmission is incident and emitted through facets provided at both ends of the optical fiber.

Such an optical fiber includes a core through which light travels and a clad in the form of a thin film surrounding the core. A single optical fiber may be used depending on the application type, and in a solar power generation or plant cultivation system, an optical fiber is used in the form of a bundle to transmit a large amount of optical energy.

The amount of light energy through the optical fiber is determined by the light energy incident on the optical fiber, and a general method of injecting a large amount of light energy is to focus the incident light on the mirror surface of the optical fiber using a lens having a wide light incident area ( converging).

It is desirable to study a method for increasing the light utilization efficiency by increasing the amount of light received by the optical fiber in the photovoltaic power generation system using such an optical fiber.

One or more embodiments (one or more embodiments) present a photovoltaic power generation unit and system using a light transport medium capable of supplying high energy light by greatly expanding the light incident area.

One or more embodiments provide a photovoltaic power generation unit and system using an optical transport medium capable of increasing an incident amount of light per unit area of an optical fiber.

According to one or more embodiments,

Solar Power Unit:

Solar panels that generate electricity by light waves; And

At least one optical fiber disposed to face the solar panel and including a core through which light travels and a clad surrounding the core, and at least one lens for injecting external light into the optical fiber An optical transmission medium comprising;

The optical fiber:

a light injection region in which one or more light injection windows are formed through which the core is exposed through the clad through which light from the outside is incident; and

a light output region facing the solar panel and in which at least one light output window through which a core is exposed through the clad is formed; includes,

The lens is installed in the light injection window to inject light incident from the outside into the core through the light injection window.

According to one or more embodiments, a plurality of the optical fibers may be disposed in parallel with the solar panel, and light exit windows of the optical fibers may be disposed to face the solar panel.

In one or more embodiments, a plurality of optical fibers arranged in parallel with respect to the solar panel may be supported by an optical fiber support panel having a trench-type optical fiber fixing groove.

According to one or more embodiments, the plurality of light injection windows may be formed around the light injection area of the light fire in the light injection area.

According to one or more embodiments, one light injection window and one lens may be disposed on one straight line orthogonal to the central axis of the core.

According to one or more embodiments, in the light injection region, the light injection window may be provided at an end of the core, and the lens may be installed on the light injection window at the end of the core.

According to one or more embodiments, the lens is provided with a light collecting unit to which light from the outside is incident, and a wedge-shaped light injecting unit implanted in the core on a bottom surface of the light collecting unit, and the wedge-shaped light injecting unit is provided in the light injecting window. A light injection unit receiving groove corresponding to the portion may be formed.

According to one or more embodiments, the lens includes a light collecting unit to which light from the outside is incident, and a wedge-shaped light injecting unit provided on a lower surface of the light collecting unit to inject light from the light collecting unit into the core, and the light injection In the region, the light injection window is provided on at least one of the outer peripheral surfaces, and the tip of the wedge-shaped light injection unit is spaced apart from the center of the core.

According to one or more embodiments, a plurality of the optical fibers may be integrated into one to form an optical fiber bundle.

According to one or more embodiments,

an optical transport medium provided with a light injection area and a light exit area on one side and the other side;

a tube type housing having an inner space in which the light exit area is located; And

and a power generation part provided on at least one side of the housing and including a solar panel generating power by a light wave incident from the light output region of the optical fiber; and

The optical transport medium is:

An optical fiber comprising; a core through which light travels and a clad surrounding the core;

A light injection region and a light output region are defined on one side and the other side of the optical fiber, and are provided in the light injection region to penetrate the cradle and expose the core at the bottom. at least one light injection window; And

A lens mounted on the light injection window to inject light incident from the outside into the core through the light injection window; provided, a photovoltaic unit is provided.

According to one or more embodiments,

A number of integrated photovoltaic power generation units; including,

The solar power unit:

an optical fiber having a light injection area and a light output area provided on one side and the other side;

a tube type housing having an inner space in which the light exit area is located; And

and a power generation part provided on at least one side of the housing and including a solar panel generating power by a light wave incident from the light output region of the optical fiber;

The optical transport medium is:

An optical fiber comprising; a core through which light travels and a clad surrounding the core;

A light injection region and a light output region are defined on one side and the other side of the optical fiber, and are provided in the light injection region to penetrate the cradle and expose the core at the bottom. at least one light injection window; And

A lens mounted on the light injection window to inject light incident from the outside into the core through the light injection window; provided, a photovoltaic system is provided.

According to one or more embodiments, the housing has a plurality of walls surrounding the light exit area of the optical fiber, and the optical fiber is located in at least one of a plurality of corners in the middle of the inner space or between the walls, A solar panel to which the light from the optical fiber is incident may be formed or installed on at least one of the plurality of walls.

According to one or more embodiments, the inner space of the tube-shaped housing surrounding the inner space of the housing may have an inner wall corrugated in a wavy shape, and a solar panel may be formed on the inner wall.

According to one or more embodiments, a rib for supporting an optical fiber may be formed on an inner wall of the housing, and a solar panel may be formed on the inner wall of the housing and a side surface of the rib.

According to one or more embodiments, the housing may have a corrugated inner wall in a wavy shape, the solar panel may be formed on the inner wall, and the optical fiber may be spaced apart from the inner wall.

According to one or more embodiments, the light exit window may be provided by a continuous or discontinuous groove formed in a spiral shape on an outer circumferential surface of the optical fiber.

According to one or more embodiments, an optical fiber having a light injection region defined at one end and a plurality of lenses implanted therein, and a photovoltaic power generation unit and system applying the same are provided. An optical fiber having a plurality of lenses implanted therein may be used for various purposes. The power generation unit has a structure in which a solar panel is arranged around a space in which one or more optical fibers are located. A number of such bar-shaped photovoltaic power generation units can be three-dimensionally integrated, so that large-capacity power generation is possible in a narrow space, and the body of the power generation system except for the light incident surface can be installed indoors. According to such a photovoltaic unit, it is possible to popularly supply a large-capacity photovoltaic power plant and a medium and small power generation system while significantly lowering mobility, cost, and installation area. In particular, in order to secure a considerable area when installing a conventional solar power plant, it is possible to innovatively improve the increase in the management cost due to the deterioration of the environment and the decrease in the lifespan due to the change of the surrounding environment. Furthermore, it has the effect of being widely used in application fields such as home solar electricity, solar power generation in areas where it is difficult to secure a site, space engineering, large ships, electric vehicles, and portable electric appliances.

1 is a perspective view illustrating an optical transport medium applied to one or more embodiments.
Fig. 2A is a longitudinal sectional view of a light injection region of the optical fiber shown in Fig. 1;
Fig. 2B is a cross-sectional view of a light injection region of the optical fiber shown in Fig. 1;
FIG. 3 is a schematic cross-sectional view for explaining an arrangement form of a lens in the optical transport medium shown in FIG. 1. FIG.
4 illustrates another variation of a lens according to one or more embodiments.
5 illustrates another variation of a lens according to one or more embodiments.
Fig. 6 partially illustrates a light injection area of another type of optical transport medium to which a lens of the type shown in Fig. 5 is applied.
Fig. 7 is a partial cross-sectional view of the optical transport medium shown in Fig. 6;
Fig. 8 partially illustrates a light injection area of another type of optical transport medium to which a lens of the type shown in Fig. 5 is applied.
Fig. 9 is a partial cross-sectional view of the optical transport medium shown in Fig. 8;
10 illustrates an optical transport medium having a light injection region Ri and an exit region Ro, according to one or more embodiments.
11A is a longitudinal cross-sectional view of the light exit area Ro of the optical transport medium shown in FIG.
11B is a cross-sectional view of the light exit area Ro of the optical fiber shown in FIG.
12 illustrates a structure in which an optical filter is provided in an exit region of an optical transport medium according to one or more embodiments.
13A-13C illustrate various types of optical and transport media in accordance with one or more embodiments.
14 is a schematic perspective view showing a power generation unit to which an optical transport medium according to one or more embodiments described above is applied.
Fig. 15 is a sectional view taken along line II of Fig. 9 showing the relationship between the optical fiber and the solar panel;
16 schematically illustrates a photovoltaic unit in the form of a rectangular bar according to one or more other embodiments.
Fig. 17 is a cross-sectional view taken along line II-II of Fig. 11;
18 is a three-dimensional view of the cross-sectional structure shown in FIG.
19A shows a partial structure of a photovoltaic power generation unit in which a plurality of optical fibers are installed inside a rectangular housing, according to one or more embodiments.
19B illustrates a partial structure of a photovoltaic unit in which a plurality of optical fibers are installed inside a rectangular housing, according to one or more embodiments.
20 is a three-dimensional view of a schematic housing internal structure of a photovoltaic unit according to one or more embodiments.
Fig. 21 is a cross-sectional view taken along line III-III of Fig. 20;
22 schematically illustrates a cross-sectional structure of a cylindrical housing of a photovoltaic unit in accordance with one or more embodiments.
Fig. 23 schematically shows a solar power generation structure of a power generation system by means of a plurality of solar power generation units.
Fig. 24 partially shows a lower portion of the solar power structure shown in Fig. 23;
25 illustrates an optical transmission medium according to another embodiment.
Fig. 26 shows an example of a solar power generating unit using the optical transmission medium shown in Fig. 25;
Fig. 27 is a diagram illustrating an arrangement of an optical fiber and light incidence with respect to a solar panel;
Fig. 28 illustrates a support panel for fixing a light transport medium to a solar panel.
29 exemplifies a photovoltaic power generation system in which a plurality of photovoltaic power generation units shown in FIGS. 26 to 28 are integrated.

Hereinafter, preferred embodiments of the present invention concept will be described in detail with reference to the accompanying drawings. However, the embodiments of the inventive concept may be modified in various other forms, and the scope of the inventive concept should not be construed as being limited due to the embodiments described below. The embodiments of the inventive concept are preferably interpreted as being provided to more completely explain the inventive concept to those of ordinary skill in the art. The same symbols refer to the same elements from time to time. Furthermore, various elements and regions in the drawings are schematically drawn. Accordingly, the inventive concept is not limited by the relative size or spacing drawn in the accompanying drawings.

Terms such as first, second, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the inventive concept, a first component may be referred to as a second component, and conversely, the second component may be referred to as a first component.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the inventive concept. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, expressions such as "comprises" or "have" are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification is present, but one or more other features or It should be understood that the existence or addition of numbers, operations, components, parts or combinations thereof is not precluded in advance.

Unless defined otherwise, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the inventive concept belongs, including technical and scientific terms. In addition, commonly used terms as defined in the dictionary should be construed as having a meaning consistent with their meaning in the context of the relevant technology, and unless explicitly defined herein, in an overly formal sense. It will be understood that they shall not be construed.

In cases where certain embodiments may be implemented differently, a specific process sequence may be performed differently from the described sequence. For example, two processes described in succession may be performed substantially simultaneously, or may be performed in an order opposite to the described order.

In the accompanying drawings, variations of the illustrated shapes can be expected, for example depending on manufacturing technology and/or tolerances. Accordingly, the embodiments of the present invention should not be construed as being limited to the specific shape of the region shown in the present specification, but should include, for example, a shape change resulting from a manufacturing process. As used herein, all terms “and/or” include each and every combination of one or more of the recited elements. Also, as used herein, the term “substrate” may refer to a substrate itself or a laminate structure including a substrate and a predetermined layer or film formed on the surface thereof. Also, in this specification, the term "surface of a substrate" may mean an exposed surface of the substrate itself, or an outer surface of a predetermined layer or film formed on the substrate. In addition, what is described as "upper" or "upper" may include not only directly above in contact, but also above in non-contact.

The solar panel or solar cell of the power generation unit applied to exemplary embodiments described below is not limited to a specific structure. That is, the solar panel applied to one or more embodiments can be replaced with any type of photoelectric conversion device or photoelectric conversion element that generates electricity by light waves.

According to preferred embodiments, the power generation unit may include a solid solar panel including a rigid substrate or a flexible solar panel including a flexible substrate. According to another embodiment, the power generation unit may include an organic polymer or an inorganic semiconductor solar cell. According to another embodiment, the power generation unit may include an amorphous or polycrystalline silicon-based solar panel. According to one or more embodiments, the power generation unit may include an organic polymer or inorganic compound photoelectric conversion material formed on a substrate on a flexible metal or inorganic film. According to one or more embodiments, the power generation unit may include a perovskite solar panel or a dye-sensitized solar panel. According to one or more embodiments, the power generation unit may include a photoelectric conversion structure that is formed directly on the inner wall of the housing or is separately manufactured and attached, and the solar panel or solar cell referred to in the following description has the above specific structure. Of course, it is not limited to

First, various types of optical transmission media 110 applied in one or more embodiments will be first described.

1 illustrates an optical transport medium 110 including an optical fiber 11 in the form of a thread or wire applied to a photovoltaic device according to an embodiment and a lens 20 mounted thereon. In the optical fiber of the optical transport medium, a light injection region Ri and a light exit region Ro are defined. In Fig. 1, "A" denotes a light injection region Ri of the optical fiber 11 in which a plurality of lenses 20 are implanted. The optical fiber 11 includes a central core 11a and a clad 11b covering it. The optical fiber 11 guides the light incident through the lens 20 of the light injection region Ri through the core 11a in the opposite direction. The lens 20 is formed at the periphery or end of the optical fiber 11 in the light injection region Ri, or both. On the other hand, as enlarged at “B” in FIG. 1 , in the light exit area Ro, a plurality of light exit windows 11d penetrating the cradle 11b are formed. It exits to the outside of the optical fiber 11 through the optical fiber 11, which will be described in detail later.

FIG. 2A is a longitudinal cross-sectional view of the light injection region Ri in the optical fiber 11, and FIG. 2B is a schematic cross-sectional view of a portion to which a lens 20 is attached. 2A and 2B , a light injection window 11c in which a lens 20 is mounted is formed in the light injection region Ri of the optical fiber 11, and the light injection window 11c includes an optical fiber ( 11), that is, the clad 11b is penetrated, and the surface of the core 11a is exposed at the bottom bottom thereof. The light injection region Ri includes not only the outer circumferential surface of the optical fiber, but also a cross-section or facet thereof. Here, the surface or cross-section of the core exposed at the bottom of the light injection window 11c may be processed to correspond to the bottom surface of the lens 20 . In the light injection window 11c, the lens 20 is coupled to one side of the core 11a by an optical adhesive 21 .

Accordingly, in the light injection region Ri, the light 1 from the outside is injected into the core 11a through the plurality of lenses 20, and the light injected into the core 11a follows the core 11a. will break out Here, the end of the core or the mirror surface on the side of the light injection region Ri may be optically closed by a light blocking material or component, and the lens 20 may be mounted according to another embodiment.

Meanwhile, as shown in FIG. 3 , in disposing the lenses 20 on the outer circumferential surface of the optical fiber 11 , the adjacent lenses 20 do not face each other with the center 11a' of the core 11a positioned. It is preferable that they are staggeredly attached to each other. When two lenses 20 adjacent to each other with respect to the core 11a face each other, the light incident through one lens 20 may escape through the other lens 20. It is preferable to place

4 illustrates various types of lenses applied to an optical transport medium according to one or more embodiments.

The lens shown in (a) of FIG. 4 has a hemispherical or dome-shaped curved surface, the lens shown in (b) has a perfectly spherical shape, and the lens shown in (c) has a conical shape. Lenses according to one or more embodiments may be modified or modified into more various shapes, and the technical scope of the present disclosure is not limited by the specific lens shape.

As described above, the optical fiber 11 having the light injection region Ri provided with the plurality of lenses 20 can be used for various purposes, and a lighting system for an automobile, a light source device for a greenhouse, a display device, a solar power system, etc. and its use can be further expanded.

5 illustrates a new type of lens 20 that has been modified in accordance with one or more embodiments.

As shown in FIG. 5 , the lens 20 includes a hemispherical light condensing unit 21 , which is incident on light, and a wedge provided on the bottom surface of the condensing unit 21 and injecting the light from the condensing unit 21 into the core 11a. and a fluorescence injection unit 22 .

6 and 8 show various application examples of the lens 20 having the cone-shaped wedge-shaped light injection unit 22 as described above, and FIGS. 7 and 9 are cross-sectional views of FIGS. 6 and 7, respectively. .

6 and 7 show a structure in which the lens 20 is installed only on the end face or the mirror surface of the optical fiber 11 . A light injection window 11c is formed on the mirror surface of the optical fiber 11, and a light injection unit receiving groove 11c' extending deeply along the axis of the core 11a is formed at the bottom thereof. According to this structure, the light 1 can be deeply injected into the core through the lens 20 provided at the end of the optical fiber 11 . Here, the length of the light injection unit 22 provided under the lens 20 will be adjusted according to optical conditions, mechanically or the processing technology of the light injection unit 11c' for the lens and optical fiber allows It is preferable to extend as much as possible within the range.

8 and 9 exemplify an optical transport medium 110 having a structure formed from a side surface as well as a cross-section of the optical fiber 11 . A plurality of lenses 20 are installed on the mirror surface and the outer surface of the optical fiber 11 . A light injection window 11c is formed on the mirror surface of the optical fiber 11, and a light injection unit receiving groove 11c' extending deeply along the axis of the core 11a is formed at the bottom thereof. In addition, a plurality of light injection windows 11c are also formed on the outer peripheral surface of the optical fiber 11, and at this time, the light injection unit receiving groove formed in the core 11a extends close to the center of the core 11a, and at this time, the core In order to suppress the interference of light propagation through the center, it must be spaced apart by a predetermined distance (x) from the center of the core.

Meanwhile, in the optical transport medium 110 shown in FIGS. 8 and 9 , the lens 20 disposed on the end face of the optical fiber 11 may be excluded, and in this case, the end face of the optical fiber 11 is optically blocked. can be

Fig. 10 schematically once again illustrates an optical transport medium having a light injection region Ri and a light exit region Ro according to another embodiment, Fig. 11A is a longitudinal cross-sectional view of the light exit region Ro, and Fig. 11B is It is a cross-sectional view of the light exit area Ro.

Referring to FIG. 10 , the optical fiber 11 including the core 11a and the clad 11b includes a plurality of lenses 20 to which the light 1 is incident as described above on one side according to various embodiments as described above. It includes a light injection region Ri disposed along the , and a light exit region Ro is provided at the other side thereof. In the light exit area Ro, the light exit window 11d is formed in the longitudinal direction of the optical fiber in a direction surrounding the main surface of the optical fiber. In this case, the light injection region Ri and the light exit region Ro may be adjacent to each other or may be spaced apart from each other by a predetermined distance.

11A and 11B are longitudinal and cross-sectional views of the light exit area Ro showing the structure of the light exit window 11d. 11A and 11B, the light exit window 11d has a through-hole structure penetrating the cradle 11b, and the surface of the core 11a is exposed at the bottom thereof.

In the optical fiber 11 having this structure, the light 1 travels along the core 11a covered by the cradle 11b. The clad 11b confines the light wave 1 in the core 11a through interfacial reflection and guides the light 1 to travel along the core 11a. The surface of the core 11a is exposed at the bottom or bottom of the light exit window 11d formed in the cradle 11b in the emission area Ro, and thus the light 1 traveling through the core 11a is located in this portion. A part exits to the outside through the light exit window 11d.

12 conceptually illustrates a structure in which an optical filter 11e for passing or blocking a specific wavelength is provided in the light exit region 11d of the optical fiber 11 according to one or more embodiments. That is, the optical transport medium 110 according to one or more embodiments may apply a filter that selects or blocks a specific wavelength from among specific light components to a light wave passing through the light exit window 11d. That is, the optical transport medium 110 according to one or more embodiments may apply the optical filter structure as described above to the light injection region in various forms. In addition, in the optical fiber according to one or more embodiments, a core protective coating layer for protecting a core may be applied in various forms together with the filter or by replacing the filter in the light injection region.

The optical filter 11e as described above or a filter-type protective coating layer that replaces it can be modified in various forms and can be mounted on the light exit area 11d as a separate part, and according to another embodiment, the light exit area ( A desired wavelength selective filter is formed by coating the filter material for 11d), while the core protective coating layer can be formed by coating a transparent material layer that protects the core. In the following description of the embodiment, for convenience, the filter is not referred to, nor is it indicated on the drawings.

13A, 13B, and 13C illustrate the optical transport medium 110 in which the light exiting portion 11d formed in the cradle 11b of the optical fiber 11 is formed in a spiral or spiral shape. The spiral-type light exiting part 11d' is formed by a spiral-shaped groove while rotating around the outer circumferential surface of the optical fiber 11, so that light traveling inside the core is emitted to the outside through the spiral-shaped groove. be able to This groove may be continuously formed on the entire outer circumferential surface of the optical fiber, or may be partially cut off and formed discontinuously in the clad. However, it goes without saying that various embodiments are not technically limited by the light exit window of a specific structure or shape formed on the clad.

14 is a schematic perspective view showing a power generation unit to which the optical transport medium 110 is applied as one application example of the optical transport medium 110 according to various embodiments as described above, and FIG. 15 is an optical fiber and a solar It is a cross-sectional view of the I-I line showing the relationship of the panels.

14 and 15 , the optical fiber 11 of the optical transport medium 110 has a light injection region Ri and a light exit region Ro. A power generation unit by the plurality of solar panels 30 is disposed around the light exit area Ro where a plurality of light exit windows 11d are formed.

The light wave 1 is injected into the core 11a of the optical fiber 11 through the plurality of lenses 2 in the light injection area Ri, and the light wave 1 that travels through the core 11a in the light exit area Ro. ) passes through the light exit window 11d formed in the clad 11b covering the core 11a.

The light exit window 11d of the light exit area Ro is formed by partially removing the cladding 11b, and the core 11a is exposed at the bottom thereof. In the present embodiment, the light exiting portions 11d of the optical fiber 11 are formed in four radial directions to correspond to the four solar panels 30 arranged in four directions.

The solar panels 30 are disposed on a light wave propagation path from the light exit window 11d of the optical fiber 11 . The number of solar panels 30 is not limited, and according to another embodiment, two or three or four or more are provided so that the light output area of the optical fiber 11 is partially or wholly the solar panel ( 30) can be surrounded by Also, according to another exemplary embodiment, the solar panel 30 is to be installed inside the housing 12 in the shape of a triangular pole, square pole or polygonal pole having a plurality of walls 12a surrounding the optical fiber 11 . can

The optical fiber 11 is installed in the housing 12 or an internal space provided by a plurality of solar panels 30 inside the housing 12 to supply the light 1 to all the solar panels 30 .

According to another embodiment, the light exiting part 11d of the optical fiber 11 may have a structure of the spiral exiting part 11d' as described above. As mentioned in the description of FIGS. 13A to 13C , the spiral type light exiting part 11d ′ may be formed by a groove formed in a spiral shape while rotating around the outer circumferential surface of the optical fiber 11 . This groove may be continuously formed on the entire outer circumferential surface of the optical fiber, or may be partially cut off and formed discontinuously in the clad. However, it goes without saying that various embodiments are not technically limited by a specific structure or shape of a light exit window formed on the cradle.

16 schematically shows a photovoltaic power generation unit in the form of a square bar according to an exemplary embodiment.

The photovoltaic power generation unit 10 shown in FIG. 16 includes a housing 12 having a plurality of walls 12a forming an inner space in which the light exit region Ro of the optical fiber 11 is embedded. One or more solar panels 30 are disposed inside the housing 12, partially or entirely enclosing the light exit area Ro of the optical fiber 11 as described with reference to FIGS. 9 and 10 .

A sealing member or end caps 13 and 14 are coupled to both ends of the housing 12 , and an optical fiber 11 passes through one end cap 13 . In the end caps 13 and 14 , the inner space of the housing 12 is isolated from the outside, and may be in a vacuum state. The inner space of the housing 12 in a vacuum state prevents light scattering or absorption by moisture or foreign substances, thereby increasing the light use efficiency for power generation.

17 is a cross-sectional view taken along line II-II of FIG. 16, and FIG. 18 is a three-dimensional view of the cross-sectional structure shown in FIG.

16, 17 and 18, the housing 12 has the shape of a square bar having a square cross section, and the light exit area of the optical fiber 11 is located in the center thereof, and the light injection area is is omitted. The ribs (lib, 12a) in a diagonal direction from the four inner corners of the housing 12 toward the inner center extend a predetermined length to support the optical fiber 11 provided at the inner center of the housing 12 . Then, the solar panel 30 is installed on each of the inner surfaces of the four walls 12a inside the housing 12 .

The solar panel 30 is not limited by a specific material or structure, and may be installed on the inner wall of the housing 12 in the state of a finished body formed on a separate substrate, and according to another embodiment, the housing ( 12) may be formed by coating the photoelectric conversion material and electrodes on both sides of the inner wall itself.

19A and 19B show partial structures of a photovoltaic power generation unit in which a plurality of optical fibers are installed inside a square and triangular housing according to another embodiment.

19A and 19B, the solar panel 30 is installed or formed on the inner wall of the housing 12 in the shape of a hollow square and triangular rod with an empty center. In addition, the light transport medium 110 is installed at four and three corners of the inner side of the housing 12 , and the light injection area is omitted for convenience. In this structure, as shown in FIG. 11, an optical fiber 11 having a light exit window 11d through which light waves are emitted in only one direction is applied. At this time, as shown in FIG. 12 , the optical fiber 11 has an outgoing light direction (arrow) toward the inner space of the housing 12, and at this time, the light outgoing direction is directed to the inner center (solid arrow) or two opposite sides away from it. It can be oriented to face either of the solar panels (dotted arrow).

20 is a three-dimensional view of a schematic housing internal structure of a photovoltaic unit according to another embodiment, and FIG. 21 is a cross-sectional view taken along line III-III of FIG. 20 .

20 and 21 , the housing 15 has a circular or elliptical pipe or tube shape, and a plurality of ribs 15a extending from the inner wall of the housing 15 to the center at the inner center thereof. The optical transport medium 110 supported by the is positioned, and the solar panel 33 is attached or formed on the inner surface of the housing 15 . The solar panel 30 is a laminate structure including a photoelectric conversion material and an electrode on the inner wall of the housing 15 itself, and may be formed directly on the inner wall. According to another embodiment, a flexible solar panel based on a flexible film It can be replaced by a panel. In this embodiment, the difference in the travel distance of the light wave for each solar panel portion from the optical fiber 11 of the light transport medium 110 is smaller than the difference in the travel distance in the photovoltaic unit of the rectangular housing of the above-described embodiment.

22 schematically illustrates a structure of a housing of a photovoltaic unit according to another embodiment. The housing 16 in this embodiment has a hollow cylindrical shape, and an inner wall 16a of a corrugated wavy shape is formed therein. Accordingly, in the cross section of the housing, the inner space of the housing has a corrugated wavy or star shape. According to this structure, therefore, the wavy inner wall 16a has a greatly expanded area.

A photoelectric conversion structure for solar power generation may be laminated on the corrugated inner wall 16a, and one or more of the various types of light transport media 110 described above may be installed therein.

In addition, the protrusion of the inner wall of the corrugation may support the optical fiber of the optical transport medium located in the central region of the inner space.

Fig. 23 schematically shows a solar power generating structure of a power generation system by a plurality of solar power generating units, and Fig. 24 partially shows a lower part of the solar power generating structure shown in Fig. 23 .

23 and 24, a plurality of photovoltaic power generation units 10 aligned in one direction (up and down in the drawing) are two-dimensionally densely arranged on one plane. The photovoltaic power generation unit 10 includes a rectangular tube-shaped housing 12 and an optical fiber 11 having a light exit region Ro on one side inside the housing 12 . In addition, the outer ends of the optical fibers 11 , that is, the light injection region Ri in which the light injection occurs, are arranged side by side. A large number of these solar power generation units 10 are concentrated in two directions to implement a large-scale solar power generation structure 40 .

In the solar power structure shown in FIGS. 23 and 24 , the light injection regions Ri of the countless optical fibers 11 provided thereon are bundled (bundled) into one or a plurality of bundles, and each of the optical fibers of each bundle is Sunlight, that is, light waves, is injected into the core of all optical fibers through the plurality of light injection lenses of the plurality of parallel light injection regions Ri. A characteristic of this structure is that there is no optical device such as a separate condensing lens, and light waves are directly received through the optical fiber itself.

25 illustrates an optical transmission medium 110 according to another embodiment.

Referring to FIG. 25 , the optical fiber 11 including the core 11a and the clad 11b includes a plurality of lenses 20 to which the light 1 is incident as described above on one side according to various embodiments as described above. It includes a light injection region Ri disposed along the , and a light exit region Ro is provided at the other side thereof. In the light exit area Ro, unlike the structure described in FIG. 10, the light exit window 11d includes a light exit window 11d along one line extending from the outer circumferential surface of the clad 11b in the longitudinal direction of the optical fiber 11. are placed

26 shows an example of a photovoltaic unit using the optical transmission medium 110 shown in FIG. 25, and FIG. 27 shows the arrangement of the optical fiber 11 relative to the solar panel 30 and the light incident on the solar panel. It is a diagram illustrating

26 and 27 , a plurality of optical fibers 11 are arranged in parallel with respect to a light incident plane of one solar panel 30 . The plurality of light exit windows 11d formed in the optical fiber 11 are directed toward the solar panel 30 .

In addition to the above structure, as shown in FIG. 28, a ditch-type fixing groove 41 surrounding the lower portion of the optical fiber 11 to a predetermined height in order to stably fix and support the plurality of optical fibers 11 arranged side by side. ) can be applied to the support panel 40 having. If such a support panel 40 is used, if it is good to align the optical fiber 11 with respect to the solar panel 30, it is advantageous to stack a plurality of solar power generation units in a power generation system to be described later.

29 exemplifies a photovoltaic power generation system in which multiple photovoltaic power generation units having the structure shown in FIGS. 25 to 28 are stacked.

29, the solar panel 30 and the supporting panel 40 are alternately arranged to form a multi-sandwich structure, and the optical fiber or the optical transport medium is provided in the fixing groove 41 of the supporting panel 40. ) is fixed between the support panel 40 and the solar panel 30 in the inserted state.

In the solar power system shown in FIG. 29, the light injection regions Ri of the countless optical fibers 11 provided thereon are bundled (bundled) into one or a plurality of bundles, and a plurality of optical fibers of each bundle are provided. Sunlight, that is, light waves, is injected into the core of all optical fibers through the light injection lenses of the plurality of parallel light injection regions Ri. A characteristic of this structure is that there is no optical device such as a separate condensing lens, and light waves are directly received through the optical fiber itself.

In the above embodiments, the solar panel of the photovoltaic unit may be a well-known perovskite solar panel or cell. A perovskite solar panel or solar cell comprises a perovskite structural compound.

Although shown and described in relation to specific embodiments in the present disclosure, it is understood in the art that the present invention can be variously improved and changed without departing from the spirit or field of the present invention provided by the following claims. It is intended to be clear that those with ordinary knowledge can easily know.

Claims (25)

Solar panels that generate electricity by light waves; And
At least one optical fiber disposed to face the solar panel and including a core through which light travels and a clad surrounding the core, and at least one lens for injecting external light into the optical fiber In the photovoltaic unit comprising; an optical transmission medium comprising:
The optical fiber:
a light injection region in which one or more light injection windows are formed through which the core is exposed through the clad through which light from the outside is incident; and
a light output region facing the solar panel and in which at least one light output window through which a core is exposed through the clad is formed; includes,
The lens is installed in the light injection window so as to inject light incident from the outside into the core through the light injection window, solar power generation unit. According to claim 1,
A photovoltaic power generation unit in which an optical filter or a core protective coating layer is provided on a plurality of light exit windows passing through the cradle in the light exit area. The method of claim 1,
The light output window is provided by a continuous or discontinuous groove formed in a spiral on the outer peripheral surface of the optical fiber. 4. The method according to any one of claims 1 to 3,
The lens is a photovoltaic unit that is disposed to be shifted from each other about the core on the outer circumferential surface of the light fire. 4. The method according to any one of claims 1 to 3,
In the light injection region, the light injection window is provided at an end of the core, and the lens is installed in the light injection window of the end of the core. 6. The method of claim 5,
The lens includes a light collecting unit to which light from the outside is incident, and a wedge-shaped light injecting unit provided on a bottom surface of the light collecting unit to inject light from the light collecting unit into the core. 7. The method of claim 6,
A photovoltaic power generation unit in which a light injection unit receiving groove corresponding to the wedge-shaped light injection unit is formed in the light injection window of the optical fiber. 8. The method of claim 7,
The photovoltaic power generation unit having the receiving groove formed at one end of the optical fiber and extending in the longitudinal direction of the core. 4. The method according to any one of claims 1 to 3,
The lens is a photovoltaic unit provided with a light collecting unit to which light from the outside is incident, and a wedge-shaped light injecting unit provided on a bottom surface of the light collecting unit and injecting light from the light collecting unit into the core. 10. The method of claim 9,
The lens includes a light collecting unit to which light from the outside is incident, and a wedge-shaped light injecting unit provided on the bottom surface of the light collecting unit to inject light from the light collecting unit into the core,
The photovoltaic power generation unit in which the receiving groove extending in the longitudinal direction of the core is formed at one end of the optical fiber. 4. The method of any one of claims 1 or 3,
The lens includes a light collecting unit to which light from the outside is incident, and a wedge-shaped light injecting unit provided on a bottom surface of the light collecting unit to inject light from the light collecting unit into the core, and
In the light injection region, the light injection window is provided on at least one of the outer peripheral surfaces, and the tip end of the wedge-shaped light injection unit is spaced apart from the center of the core. 12. The method of claim 11,
The lens includes a light collecting unit to which light from the outside is incident, and a wedge-shaped light injecting unit provided on the bottom surface of the light collecting unit to inject light from the light collecting unit into the core,
The receiving groove extending in the longitudinal direction of the core is formed at one end of the optical fiber, the photovoltaic unit. 5. The method of claim 4,
The lens includes a light collecting unit to which light from the outside is incident, and a wedge-shaped light injecting unit provided on the bottom surface of the light collecting unit to inject light from the light collecting unit into the core,
The receiving groove extending in the longitudinal direction of the core is formed at one end of the optical fiber, the photovoltaic unit. According to claim 1,
A photovoltaic unit, wherein a plurality of optical fibers are arranged side by side with respect to the solar panel on a plane, and a light exit window formed in a clad of the optical fiber is directed toward the solar panel. 3. The method of claim 1 or 2,
A photovoltaic unit, wherein a plurality of optical fibers are arranged side by side with respect to the solar panel on a plane, and a light exit window formed in a clad of the optical fiber is directed toward the solar panel. 16. The method of claim 15,
The optical fiber facing the solar panel is fixed by a support panel having a fixing groove into which the optical fiber is inserted into a sea facing the solar panel, a photovoltaic unit. an optical fiber having a light injection region and a light exit region on one side and the other side;
a tube type housing having an inner space in which the light output region is located; And
A power generation part (power generation part) including a solar panel provided on at least one side of the inside of the housing to generate electricity by a light wave incident from the light exit region of the optical fiber;
The optical fiber is:
a body including a light propagating core and a clad surrounding the core; a plurality of light injection windows provided in the light injection area; And
A lens mounted on the light injection window and injecting light incident from the outside into the core through the light injection window; a photovoltaic unit having. 18. The method of claim 17,
The housing has a plurality of walls surrounding the light exit area of the optical fiber,
The optical fiber is located in at least one of a plurality of corners in the middle of the inner space or between the walls,
A photovoltaic power generation unit in which a solar panel to which light from the optical fiber is incident is formed or installed on at least one of the plurality of walls. 18. The method of claim 17,
The inner space of the tube-shaped housing enclosing the inner space of the housing has an inner wall corrugated in a wavy shape, and
A solar panel is formed on the inner wall, a photovoltaic unit 18. The method of claim 17,
The housing has a corrugated inner wall in a wavy shape,
The solar panel is formed on the inner wall, and the optical fiber is spaced apart from the inner wall. 18. The method of claim 17,
The inner space of the housing is isolated from the outside by an end cap to maintain an airtight or vacuum state, a photovoltaic unit. A number of integrated photovoltaic power generation units; including,
The solar power unit:
an optical fiber having a light injection region and a light exit region on one side and the other side;
a tube type housing having an inner space in which the light output region is located; And
A power generation part provided on at least one side of the inside of the housing and including a solar panel generating power by a light wave incident from the light output region of the optical fiber; including a roll,
The optical fiber is:
a body including a light propagating core and a clad surrounding the core; a plurality of light injection windows provided in the light injection area; And
A lens mounted on the light injection window to inject light incident from the outside into the core through the light injection window; comprising, a photovoltaic system. 23. The method of claim 22,
The housing has a plurality of walls forming the interior space,
The optical fiber is located in a central region of the inner space of the housing,
The solar panel is formed or installed on at least one of the plurality of walls, a photovoltaic system. 23. The method of claim 22,
The inner space of the housing is isolated from the outside by an end cap to maintain an airtight or vacuum state, a photovoltaic system. 23. The method of claim 22,
An optical filter or a core protective coating layer is provided on the light exit window, a solar power system.

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