KR101480565B1 - Apparatus for solar power generation - Google Patents

Abstract

A photovoltaic power generation apparatus is disclosed. The photovoltaic device is a transparent pipe through which the infrared absorbing fluid flows; And a solar cell that converts light that has passed through the fluid to electrical energy. Photovoltaic devices can absorb infrared rays, utilize them as thermal energy, and convert visible light and ultraviolet light into electrical energy. Therefore, since the solar cell device can lower the temperature of the solar cell, the energy conversion efficiency can be improved and thermal energy other than electric energy can be utilized.

Solar, battery, power generation, infrared, heat, energy

Description

[0001] APPARATUS FOR SOLAR POWER GENERATION [0002]

The embodiments relate to a photovoltaic device and a light condensing device.

Recently, as demand for energy has increased, solar cells that convert solar energy into electric energy and photovoltaic power generation devices using the same have been developed.

In order to allow solar cells to enter the solar cell, the solar cells may be exposed to the outside. At this time, the solar cells exposed to the outside may be damaged.

In addition, such photovoltaic devices should have improved power generation efficiency.

An embodiment of the present invention is to provide a solar power generator capable of efficiently producing electric energy and thermal energy using sunlight.

The photovoltaic device according to the embodiment includes a transparent pipe through which a fluid that absorbs infrared rays flows; And a solar cell that converts the light that has passed through the fluid to electrical energy.

The photovoltaic device according to the embodiment includes a fluid that absorbs infrared rays, and generates electric energy using light that has passed through the fluid.

Accordingly, the photovoltaic device according to the embodiment generates heat energy by the fluid absorbing the infrared rays, and generates electric energy by the solar battery.

At this time, since the solar cell converts sunlight absorbed by infrared rays into electric energy, the temperature of the solar cell is lowered, and the photo-electric conversion efficiency of the solar cell can be improved.

Therefore, the photovoltaic device according to the embodiment can efficiently produce electric energy and heat energy.

In addition, since the solar photovoltaic device according to the embodiment separately generates electric energy and thermal energy, the generated electric energy and heat energy can be efficiently used without any additional conversion process.

In the description of the embodiments, each lens, member, cell, film, surface, or pattern is formed "on" or "under" of each lens, cell, film, Quot; on "and" under "include both being formed" directly "or" indirectly " In addition, the upper or lower reference of each component is described with reference to the drawings. The size of each component in the drawings may be exaggerated for the sake of explanation and does not mean the size actually applied.

1 is a perspective view illustrating a photovoltaic generator according to an embodiment. 2 is a cross-sectional view showing a section taken along the line A-A in Fig. Fig. 3 is an enlarged cross-sectional view of an exiting portion. Fig.

1 to 3, the photovoltaic device according to the embodiment includes a condenser lens 100, an infrared ray absorber 200, a light guide condenser 300, a solar cell 400, and a power storage device 500, .

The condenser lens 100 is a cylindrical lens extending in the first direction. The condenser lens 100 primarily condenses sunlight.

The condenser lens 100 includes, for example, a convex upper surface and a flat bottom surface. Examples of the material used for the condenser lens 100 include glass or plastic.

The condenser lens 100 may be a Fresnel lens, a lenticular lens, or a convex lens. The condenser lens 100 is an optical member capable of condensing light. For example, instead of the condenser lens 100, a mirror for condensing light may be used.

The infrared ray absorber 200 is disposed below the condenser lens 100. The infrared absorption unit 200 is a pipe 210 and a fluid 220 flowing inside the pipe 210 and absorbing infrared rays.

The pipe 210 is transparent and connected to the jig so that the fluid 220 can flow. The pipe 210 may be a half pipe having a semicircular cross section.

The fluid 220 is transparent and filters the passing light to selectively absorb infrared radiation. The fluid 220 is a transparent material having a low viscosity, a high thermal conductivity, and a low volume expansion coefficient. Examples of the material used as the fluid 220 include an antifreeze with high thermal conductivity, an oil for electrothermal heater, a freon-based gas or liquid, and a helium gas.

Alternatively, the fluid 220 may include a transparent liquid and particles that absorb infrared light that is dispersed in the transparent liquid. Examples of the particles that absorb infrared rays include indium tin oxide (ITO), antimony tin oxide (ATO), and the like.

The fluid 220 may be circulated by the pipe 210 after it is cooled and supplied with thermal energy through a heat exchanger.

The light condensed by the condenser lens 100 passes through the infrared absorbing unit 200 and the infrared rays are absorbed by the fluid 220. That is, only visible light and ultraviolet light among the primary focused light pass through the infrared absorbing unit 200.

The light guide condensing member 300 is disposed below the infrared ray absorbing part 200. The light guide condensing member 300 and the infrared ray absorbing unit 200 may be in contact with each other.

The light guide condensing member 300 condenses the filtered light passing through the infrared absorbing unit 200. More specifically, the light guide condensing member 300 guides the filtered light, condenses it, and emits it.

The light guide member 300 has a wedge shape. For example, the light guide condensing member 300 has a shape extending in the first direction. Examples of the material used as the light guide condensing member 300 include glass, quartz, and plastic. More specifically, examples of the material used for the light guide condensing member 300 include polycarbonate (PC), polymethylmethacrylate (PMMA), and the like.

The refractive index of the light guide member 300 may be, for example, 1.4 to 1.6.

The light guide condensing member 300 includes a guide unit 310 and a light emitting unit 320.

The guide part 310 receives the primary condensed light and guides the light to the emitting part 320. The guide part 310 includes an incident surface 311 and total reflection surfaces 312 and 313.

The incident surface 311 faces the condenser lens 100. That is, the incident surface 311 faces the condenser lens 100. In addition, the incident surface 311 may be parallel to the upper surface of the condenser lens 100.

The focal point of the condensing lens 100 may be located on the incident surface 311 or may be located on the incident surface 311 or below the incident surface 311.

An anti-reflection film may be disposed on the incident surface 311.

The infrared ray absorbing part 200 is disposed on the incident surface 311. The infrared ray absorbing part 200 covers the incident surface 311. The infrared ray absorbing part 200 may be attached to the incident surface 311.

The total reflection surfaces 312 and 313 extend downward from the incident surface 311. The total reflection surfaces 312 and 313 are inclined with respect to the incident surface 311. The angle between the total reflection surfaces 312 and 313 and the incident surface 311 is an acute angle.

In addition, the total reflection surfaces 312 and 313 are two and face each other. The angle between the total reflection surfaces 312 and 313 may be about 1 to 35 degrees. That is, the total reflection surfaces 312 and 313 extend in directions intersecting with each other. That is, the guide portion 310 has a tapered shape.

Light incident through the incident surface 311 is totally reflected by the total reflection surfaces 312 and 313 and condensed. That is, the closer the distance is, the narrower the interval between the total reflection surfaces 312 and 313 becomes, and accordingly, the incident light is secondarily condensed.

The guide portion 310 may be gently bent. That is, the total reflection surfaces 312 and 313 may be gently curved. At this time, the total reflection surfaces 312 and 313 may be bent to such a degree that the incident light can be totally reflected.

The light emitting unit 320 is disposed below the guide unit 310. The light emitting unit 320 is formed integrally with the guide unit 310. The light emitting unit 320 has a triangular prism shape extending in the first direction.

The light emitting unit 320 includes light emitting surfaces 321 and 322. Light incident through the incident surface 311 is emitted through the exit surfaces 321 and 322. A scattering pattern 323 is formed on the exit surfaces 321 and 322.

That is, the light incident on the light guide condensing member 300 is totally reflected by the total reflection surface, is guided by the guide unit 310, is condensed, and is incident on the light emitting unit 320. Then, the light incident on the emitting portion 320 is scattered by the scattering pattern 323, and is emitted through the emitting surfaces 321 and 322.

The exit surfaces 321 and 322 are disposed on the same plane as the total reflection surfaces 312 and 313. The exit surfaces 321 and 322 intersect with each other, and an angle between the exit surfaces 321 and 322 is about 1 to 35 degrees.

The sum of the areas of the exit surfaces 321 and 322 is smaller than the area of the entrance surface 311. That is, the area of the incident surface 311 and the area of the exit surfaces 321 and 322 may be adjusted so that the light collection ratio of the light guide member 300 may be adjusted.

The solar cells 400 are disposed on the exit surfaces 321 and 322, respectively. Two are placed facing each other. The solar cells 400 have a planar area corresponding to the exit surfaces 321 and 322.

Alternatively, the planar area of the solar cells 400 may be wider than the planar area of the exit surfaces 321 and 322.

The solar cells 400 receive the secondary condensed light emitted through the exit surface and convert the light into electric energy. The solar cells 400 may include a silicon substrate having a pn junction. Alternatively, the solar cell 400 may include a CIGS-based semiconductor layer.

The solar cells 400 may be, for example, a CIGS solar cell, a silicon solar cell, a fuel sensitive solar cell, a II-VI compound semiconductor solar cell, or a III-V compound semiconductor solar cell.

The power storage device 500 stores electric energy generated from the solar cells 400. The power storage device 500 may include a circuit for rectifying the electric energy.

The sunlight is primarily condensed by the condenser lens 100. Then, the primary condensed light passes through the infrared absorbing unit 200 and is filtered. Therefore, visible light and ultraviolet rays in sunlight are incident through the incident surface 311, guided by the guide portion 310, and incident on the light emitting portion 320.

Thereafter, the guided light is secondarily condensed and emitted through the exit surfaces 321 and 322.

The photovoltaic device according to the embodiment can condense sunlight in a desired ratio by the condenser lens 100 and the light guide condenser 300. [

The solar cells 400 have the maximum conversion efficiency when light of a specific intensity is incident. For example, the solar cell 400 may be a silicon solar cell having the maximum conversion efficiency when light having an intensity of about 29 to 31 times that of general solar light is incident.

At this time, the photovoltaic device according to the embodiment can condense sunlight so that the solar cell 400 has the maximum conversion efficiency by the condenser lens 100 and the light guide condenser 300.

Further, the light guide condensing member 300 guides light by total reflection to condense the light. Therefore, the light guide condensing member 300 can reduce light loss more than an apparatus for condensing light using a reflecting member.

Therefore, the photovoltaic device according to the embodiment has improved power generation efficiency.

In addition, since the photovoltaic device according to the embodiment concentrates solar light and generates electricity, the solar cell 400 having a small area can be used for power generation.

Further, since the light guide condensing member 300 guides and collects the filtered light, the solar cells 400 can be disposed at desired positions.

That is, the light guide condensing member 300 can be gently bent. Further, the positions of the exit surfaces 321 and 322 may be changed according to the shape of the light guide member 300. Accordingly, the photovoltaic device according to the embodiment can arrange the solar cells 400 in the room.

Accordingly, the solar cells 400 may not be exposed to the outside. Accordingly, the solar cells 400 can be protected from external physical and chemical impacts. therefore. The photovoltaic device according to the embodiment has improved durability.

Further, the photovoltaic device according to the embodiment uses the light passing through the infrared absorbing part 200 to generate electric energy. The photovoltaic device according to the embodiment generates thermal energy by the infrared ray absorber 200 and generates electric energy by the solar battery 400.

At this time, since the solar cell 400 converts sunlight absorbed by infrared rays into electric energy, the temperature of the solar cell 400 is lowered. Therefore, the photo-electric conversion efficiency of the solar cell 400 can be improved.

Therefore, the photovoltaic device according to the embodiment can efficiently produce electric energy and heat energy.

In addition, since the solar photovoltaic device according to the embodiment separately generates electric energy and thermal energy, the generated electric energy and heat energy can be efficiently used without any additional conversion process.

4 is a cross-sectional view showing a cross section of a photovoltaic device according to another embodiment. In this embodiment, the infrared absorbing unit will be further described with reference to the above-described embodiments.

Referring to FIG. 4, the infrared absorbing unit 201 includes a plurality of triangle pipes 230 and a fluid 220 that absorbs infrared rays. The triangle pipe 230 has a triangular cross section.

The triangle pipes 230 are isolated from each other. Alternatively, the triangle pipes 230 may be connected to each other. That is, the triangle pipes 230 may be connected to each other laterally.

An anti-reflection film may be formed on the surface of the triangle pipe 230.

In this embodiment, since the infrared ray absorption units 201 include a plurality of triangle pipes 230, the amount of light reflected from the infrared ray absorption units 201 can be reduced. Therefore, the photovoltaic device according to the present embodiment can reduce the loss of light and can have an improved power generation efficiency.

FIG. 5 is a perspective view showing a photovoltaic device according to another embodiment. FIG. FIG. 6 is a cross-sectional view taken along line B-B 'in FIG. 5; FIG. In the present embodiment, the above-described embodiments will be referred to, and the focusing lens and the infrared ray absorbing unit will be further described.

5 and 6, a groove is formed on the lower surface of the condenser lens 101 in a direction in which the condenser lens 101 extends.

The infrared absorbing portion 202 is disposed inside the groove. The infrared absorbing portion 202 includes a half pipe 240 and a fluid 220 that absorbs infrared rays.

The outer circumferential surface of the half pipe 240 is in contact with the inner surface of the groove. At this time, the inner surface of the groove has a shape corresponding to the outer peripheral surface of the half pipe 240. More specifically, the outer circumferential surface of the half pipe 240 can be adhered to or adhered to the inner surface of the groove.

That is, an air layer may not exist between the half pipe 240 and the condenser lens 101.

The lower surface of the half pipe 240 and the lower surface of the condenser lens 101 are disposed on the same plane.

The antireflection film 301 is disposed on the incident surface 311 of the light collecting member. For example, the anti-reflection film 301 is coated on the incident surface 311. The anti-reflection film 301 improves the light-incident efficiency and reduces the reflectance.

The antireflection film 301 is transparent and has a refractive index smaller than that of the light guide condensing member 300.

Alternatively, instead of the anti-reflection film 301, an anti-reflection pattern may be formed on the incident surface 311.

The anti-reflection pattern may be an embossing pattern having a diameter of about 150 to 250 nm.

The condensing lens 101 is designed so that most of the primary condensed light emitted from the condensing lens 101 passes through the infrared absorbing unit 202.

The infrared absorbing portion 202 and the condensing lens 101 are adhered to each other, in close contact with each other, or in contact with each other. Therefore, most of the light emitted from the inner surface of the groove is incident on the infrared absorption without loss.

Accordingly, the photovoltaic device according to the present embodiment can reduce the amount of light reflected from the infrared absorbing part 202, and can have improved power generation efficiency.

FIG. 7 is a cross-sectional view illustrating a photovoltaic device according to another embodiment. In the present embodiment, the infrared absorbing unit will be further described, and the above-described embodiments will be referred to.

Referring to FIG. 7, the infrared absorbing unit 203 includes a pipe 210, a heat transfer fluid 221, and an infrared absorbing layer 230.

The pipe 210 is transparent and has a high thermal conductivity.

The heat transfer fluid 221 flows inside the pipe 210, is transparent, and has a high thermal conductivity.

The infrared absorbing layer 230 is coated on the outer circumferential surface of the pipe 210. The infrared absorbing layer 230 absorbs infrared rays from the passing light and transmits heat to the heat transfer fluid 221. Examples of the material used as the infrared absorbing layer 230 include indium tin oxide and indium zinc oxide.

Alternatively, the infrared absorption layer 230 may be coated on the inner circumferential surface of the pipe 210.

Since the infrared absorbing part 203 includes the infrared absorbing layer 230, a fluid having a high thermal conductivity can be used inside the pipe 210.

Therefore, the photovoltaic device according to the present embodiment has high efficiency.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood that various variations and applications are possible. For example, each component specifically shown in the embodiments can be modified and implemented. It is to be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

1 is a perspective view illustrating a photovoltaic generator according to an embodiment.

2 is a cross-sectional view showing a section taken along the line A-A in Fig.

Fig. 3 is an enlarged cross-sectional view of an exiting portion. Fig.

4 is a cross-sectional view showing a cross section of a photovoltaic device according to another embodiment.

FIG. 5 is a perspective view showing a photovoltaic device according to another embodiment. FIG.

FIG. 6 is a cross-sectional view taken along line B-B 'in FIG. 5; FIG.

Claims (11)

An infrared absorbing part for absorbing infrared rays of light passing therethrough; And And a solar cell that converts the light that has passed through the infrared absorption unit into electric energy. The apparatus of claim 1, wherein the infrared absorption unit Transparent pipe; And And a transparent fluid that flows inside the pipe and absorbs infrared rays. The photovoltaic device according to claim 2, wherein the fluid includes an antifreeze, an oil for an electric heater, a Freon-based gas, or a helium gas. 3. The apparatus of claim 2, wherein the fluid comprises indium tin oxide or antimony tin oxide particles. 2. The solar power generation device according to claim 1, comprising a light guide condensing member for condensing the light that has passed through the infrared absorption portion. 6. The light guide member according to claim 5, wherein the light guide condensing member includes an incident surface and an exit surface having a smaller area than the incident surface, And the infrared absorbing portion is disposed on the incident surface. The photovoltaic device according to claim 5, wherein the light guide condensing member has a wedge shape. The photovoltaic device according to claim 2, wherein the cross section of the pipe has a semicircular or triangular shape. 2. The solar power generation device according to claim 1, comprising a light collecting member for collecting the incident light and emitting the infrared light to the infrared absorbing unit. The apparatus of claim 1, wherein the infrared absorption unit A pipe through which fluid flows; And And an infrared absorbing layer formed on an outer circumferential surface or an inner circumferential surface of the pipe. The photovoltaic device according to claim 10, wherein the infrared absorbing layer comprises indium tin oxide or antimony tin oxide.

Images