KR101512061B1 - Solar power and heat energy acquiring apparatus - Google Patents

Abstract

The present invention relates to a photovoltaic power generation and thermal energy acquisition apparatus capable of simultaneously generating a plurality of photovoltaic cells while enhancing power generation efficiency by condensing photovoltaic light and effectively dissipating the photovoltaic cells. A photovoltaic power generation and thermal energy acquisition apparatus includes: a rectangular primary parabola-shaped primary reflector in which a through hole is formed in a central region and primary light is condensed; A secondary reflector disposed in front of the primary reflector for collecting the sunlight condensed by the primary reflector and reflecting the sunlight in the direction of the aperture; And a power generation unit provided at a rear portion of the through hole and including a plurality of solar cells for generating electricity using secondary light.

Description

[0001] SOLAR POWER AND HEAT ENERGY ACQUIRING APPARATUS [0002]

The present invention relates to a photovoltaic power generation and thermal energy acquisition apparatus, and more particularly, to a photovoltaic generation and thermal energy acquisition apparatus capable of simultaneously generating a plurality of photovoltaic cells while collecting sunlight to increase power generation efficiency, And a device for acquiring photovoltaic power and thermal energy.

Solar cell, which is one of the most commonly used photovoltaic devices that generate electric energy by using solar energy, is mainly made of silicon material, And has a principle of generating electricity by using the photoelectric effect in the wavelength region.

It is reported that solar cells using Si (silicon) material absorb only wavelengths in the wavelength range from 0.3 to 1.1 μm, and these wavelength regions are mainly visible light band, There is a problem that the absorption efficiency is very low in the infrared region.

More specifically, the solar cell using the silicon material not only has low absorption efficiency of sunlight in the infrared wavelength range, but also increases the surface temperature of the solar cell, thereby reducing the power generation efficiency. In other words, in the daytime of the summer when the sunlight is very strong, the sunlight is strong and the light intensity is high, but the solar cell surface temperature rises and the power generation efficiency is lowered.

Various materials other than silicon (Si) are used as the material of the solar cell, and it has a wavelength range band which is absorbed by the characteristics of the material. However, the problem is that each material has its own absorption wavelength range, so the entire wavelength range of the sunlight is simultaneously used There is a great deal of trouble.

As a technique for expanding the absorption wavelength range of sunlight, in the case of Korean Patent No. 589323 'fuel-sensitized solar cell having an extended light absorption wavelength band', a specific composite dye adsorbed on a porous film is used to expand the absorption wavelength band of the solar cell However, the nano-sized porous film is fabricated and the optical absorption region is not enlarged in cost compared to the cost required to prepare a specific composite dye to be adsorbed thereon, and the wide optical absorption region can be solved simultaneously from the visible light region to the infrared region. There is a problem that the limit is followed.

On the other hand, another solar power generation system is a solar power generation apparatus using a thermoelectric element. The thermoelectric element generates a thermoelectric effect through the Seebeck effect, the Peltier effect, and the Thomson effect due to the temperature difference between the substrate heated by the sunlight and the substrate cooled by the cooling part. It means to create open power.

As a prior art for solar power generation using such a thermoelectric element, Korean Patent Registration No. 868492 entitled " Photovoltaic Power Generation & Thermal Energy Acquisition Device with Thermoelectric Device ", Korean Utility Model Registration No. 223071, , And Korean Utility Model Registration No. 259618 " Solar heating system ".

As described above, all the thermoelectric elements and the solar cells are combined. As described above, the solar cells are low in power generation efficiency compared with the price, so there is doubt whether they can enhance the power generation efficiency when the thermoelectric elements are combined. This is not to increase the efficiency of solar power generation itself but to the level that is used for the conversion of solar cell to overheating or cooling.

For example, Korean Patent No. 868492 discloses that the problem of deterioration of a solar cell can be prevented by dispersing excessive heat of a solar cell through a thermoelectric element by using the Peltier effect, But is used merely to exhibit a heat dispersion effect.

When electricity is generated using the thermoelectric element, it can be understood that the power generation is performed by using the temperature difference between the heated substrate surface and the cooled substrate surface. Generally, when the temperature difference between the heating plate and the cooling plate of the thermoelectric element is maintained at about 300 ° C., the generation capacity is about 14 watt when the size of the thermoelectric element is, for example, 50 mm × 50 mm, watt or more has been developed in Russia or Germany is reported.

However, if a heater is used to heat the heating plate in order to secure the temperature difference between both side plates of the thermoelectric element, a very inefficient phenomenon occurs in which the heat capacity required for the heater is further increased. Therefore, in order to generate more meaningful and efficient power generation through the thermoelectric element, it is possible to suggest a heat source that does not require cost, that is, a waste heat recovery power generation, hot heat and geothermal heat. In particular, by using solar energy which is environment- It is necessary to secure the high-temperature temperature.

As a result, there is an urgent need to develop a technique for preventing the overheating of the device from being degraded in the currently used photovoltaic power generation device, and a technique for selectively selecting the light in the wavelength range bonded to the device to improve the power generation efficiency.

Also, there is a need for a technology that can completely prevent the inside of the power generation device from outside, thereby preventing malfunction in the operating process and preventing the power generation efficiency from dropping.

The present invention provides a solar power generation and thermal energy acquisition apparatus capable of simultaneously generating power for a plurality of solar cells while collecting sunlight to increase power generation efficiency and effectively dissipating the solar cell will be.

According to an aspect of the present invention, there is provided an apparatus for acquiring photovoltaic power generation and thermal energy according to the present invention, comprising: a rectangular primary parabola-shaped primary reflector having a through hole formed at a central region thereof; A secondary reflector disposed in front of the primary reflector for collecting the sunlight condensed by the primary reflector and reflecting the sunlight in the direction of the aperture; And a power generation unit provided at a rear portion of the through hole and including a plurality of solar cells for generating electricity using secondary light.

In the present invention, it is preferable that the primary reflector is formed by bending in the forward direction on the outside of the parabolic-shaped condensing surface and has a side wall portion having a square end surface.

At this time, it is preferable that the side walls are inclined from the inside to the outside.

And a plurality of protrusions are formed on the inner surface of the side wall portion at a position deeper than the step.

In addition, it is preferable that a plurality of mounting rods are formed on the rear surface of the primary reflecting mirror so as to protrude toward the rear side of the primary reflecting mirror and fix the primary reflecting mirror to the frame.

Preferably, the front end surface of the side wall portion further includes a protective glass for blocking the inside of the primary reflecting mirror from the outside.

Preferably, the protective glass is a tempered glass whose surface is reinforced.

According to another aspect of the present invention, a protective glass mounting groove for mounting the protective glass is formed at an end of the side wall, and a gasket is further provided in the protective glass mounting groove for closely fixing the protective glass to the protective glass mounting groove .

The gasket is preferably made of silicon.

A beam splitting coating surface may be further formed on the protective glass surface to reflect light in a long wavelength region of sunlight and to transmit light in a short wavelength region.

According to the present invention, since light of a long wavelength band having a high thermal contribution is photographed and irradiated to a solar cell, a plurality of solar cells can be installed and power can be generated .

In addition, in the solar power generation and thermal energy acquisition apparatus according to the present invention, since the inside of the power generation apparatus is completely sealed by the primary reflector and the protective glass provided on the front end surface thereof, the inside is completely sealed during operation, And the durability is improved.

Also, the side wall structure of the primary reflector facilitates handling during manufacture and transportation.

1 is an exploded perspective view showing a configuration of a solar power generation and heat energy acquisition apparatus according to an embodiment of the present invention.
2 is a perspective view showing a structure of a primary reflector according to an embodiment of the present invention.
3 is a partial cross-sectional view illustrating the shape of a protective glass seat and a gasket according to an embodiment of the present invention.
4 is a partial cross-sectional view showing a structure in which a protective glass is mounted according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1, the solar power generation and heat energy acquisition apparatus according to the present embodiment includes a primary reflector 10, a secondary reflector 20, a power generation unit 30, and a protective glass 40, do.

First, the primary reflector 10 is a rectangular parabola-shaped component in which a through hole 11 is formed in a central area and is primarily focused on sunlight. As shown in FIG. 1, the primary reflector 10 has a parabolic shape as a whole, and primarily condenses sunlight incident on the front center. At this time, a secondary reflector 20, which will be described later, is positioned in the focus area of the primary reflector 10. A through hole 11 is formed in a central region of the primary reflecting mirror 10 and a power generating portion 30 to be described later is installed through the through hole 11.

As shown in FIG. 1, the primary reflector 10 further includes a sidewall 12, which is formed by bending in a forward direction on the outside of the parabolic-shaped condensing surface and has a square end surface. The primary reflecting mirror 10 has a shape in which only the front direction is opened by the side wall part 12, and a space having a certain volume is formed therein. And the secondary reflecting mirror 20 is installed in this space. The front opening of the primary reflecting mirror 10 is sealed by a protective glass 40 to be described later.

At this time, in the present embodiment, it is preferable that the side wall part 12 is formed to be inclined from the inside to the outside direction. When the side wall part 12 is formed to be inclined, the opening formed by the side wall part 12 has a larger diameter as it goes forward, and a plurality of primary reflecting mirrors can be stacked. The structure having the primary reflector can be significantly reduced in volume during the production, storage, and transportation of the primary reflector.

On the other hand, a step 13 protruding inward is formed on the inner surface of the side wall portion 12 as shown in FIGS. A plurality of projections 14 are formed on the outer surface of the side wall 12 at a position slightly deeper than the step 13. Therefore, when the two primary reflectors are superimposed, the plurality of projections 14 of the primary reflector disposed on the upper side are caught by the step 13 of the other primary reflector disposed on the lower side so that the inner and outer surfaces of the primary reflector There is an advantage that the reflective layer coated on the inner surface of the primary reflector is not damaged.

Next, as shown in FIG. 1 and FIG. 2, a rear surface of the primary reflecting mirror 10 is protruded toward the rear side of the primary reflecting mirror 10, (15) is further formed. The mounting bar 15 is formed integrally with the primary reflecting mirror 10 on the rear surface of the primary reflecting mirror 10 so that the end of each mounting rod is positioned on one plane with respect to the plurality of mounting rods 15, .

When the solar power generation and thermal energy acquisition apparatus according to the present embodiment is actually installed, the plurality of installation rods 15 are installed in a frame (not shown) fixed on the ground, It serves to fix itself. For example, a bolt (not shown) for fastening the frame and the mounting rod 15 at the same time.

Next, the secondary reflector 20 is disposed in front of the primary reflector 10, and is a component that secondarily condenses sunlight focused by the primary reflector 10 and reflects the sunlight in the direction of the aperture . As described above, the secondary reflector 20 is provided in a focus region of sunlight condensed by the primary reflector 10, and the primary sunlight condensed by the primary reflector 10 is divided into secondary Condensed and directed toward the through hole 11. The secondary mirror 20 has a convex mirror shape as a whole, and a beam splitting coating surface may be formed on the surface thereof. The beam splitting coated surface transmits sunlight in a long wavelength region, and sunlight in a short wavelength region is reflected and transmitted in a through hole direction.

Next, the power generating unit 30 is a component having a plurality of solar cells 31 installed at the rear of the through hole 11 to produce electricity using secondary light. The power generating unit 30 includes a plurality of solar cells 31 and a printed circuit board 32 and a heat sink 33 to which the plurality of solar cells 31 are fixed. In addition, other components such as a backflow prevention diode are installed in a region of the surface of the printed circuit board 32 excluding the region where the solar cell 31 is fixed.

Next, the protective glass 40 is installed on the end face of the side wall part 12 to block the inside of the primary reflecting mirror 10 from the outside. When the protective glass 40 is installed on the front end of the primary reflector 10, the secondary reflector 20 and the solar cell 31 installed in the internal space are completely blocked from the outside, Or the possibility of exposure to other pollutants is excluded from the source, thereby enhancing durability.

In the present embodiment, the protective glass 40 is preferably a tempered glass whose surface has been reinforced. The protective glass 40 functions to shut off the internal space of the primary reflector 10 while the solar power generation and thermal energy acquisition apparatus 1 according to the present embodiment is installed in a state exposed to the external environment for a long time To be able to withstand a variety of situations. Therefore, even if an external force is applied due to a gust wind or other factors, it is required to withstand damage. Particularly, when scratches or the like are formed on the surface, the transmittance of incident sunlight is lowered and power generation efficiency may be lowered. Therefore, the surface is strengthened to prevent scratches or the like from occurring due to external force.

On the other hand, a beam splitting coating film may be further formed on the surface of the protective glass 40. The beam splitting coating film reflects light in a long wavelength region of solar light and transmits light in a short wavelength region. In this embodiment, light in a short wavelength region means light in a short wavelength band of less than 2 mu m in wavelength of sunlight, and light in a long wavelength region means light in a long wavelength band of wavelength 2 mu m or more.

In this embodiment, since the protective glass 40 is required to seal the inner space of the primary reflecting mirror 10 in a state where it is installed in the primary reflecting mirror 10 as described above, a special mounting structure is required Do. 3, a protective glass mounting groove 16 for mounting the protective glass 40 is formed at the end of the side wall portion 12, and the protective glass mounting groove 16 is formed in the protective glass mounting groove 16 And a gasket 50 for closely fixing the protective glass 40 to the protective glass seat groove 16.

The protective glass mounting groove 16 has a stepped cross-sectional shape for the seating of the protective glass 40. As shown in FIGS. 3 and 4, the stepped vertical surface has a curved surface with the left side and the horizontal surface facing downward I have. 3, the gasket 50 is formed in the protective glass seat groove 16 with a stretchable material. The gasket 50 has a cross-sectional shape protruding inward toward the inside of the side wall portion 12 .

4, the protruded shape of the gasket 50 having such a structure is deformed while being pressed by the protective glass 40 when the protective glass 40 is seated. The gasket 50 in such a state of being pressurized tightly closes the inner space of the primary reflector 10 while firmly coming into close contact with the edge region of the protective glass 40.

In this embodiment, the gasket 50 may be made of, for example, silicon.

10: primary reflector 20: secondary reflector
30: power generator 40: protective glass

Claims (5)

A primary reflector of a rectangular parabola shape in which a through hole is formed in a central area and is primarily focused on sunlight;
A secondary reflector disposed in front of the primary reflector for collecting the sunlight condensed by the primary reflector and reflecting the sunlight in the direction of the aperture;
And a plurality of solar cells provided at the rear of the through hole to generate electricity using secondary light collected by the solar cell,
The primary reflector may include:
A sidewall portion bent in a forward direction on the outside of the parabola-shaped light collecting surface and having a square end surface,
A stepped portion protruding inward is formed on the inner surface of the side wall portion,
And a plurality of protrusions are formed on an outer surface of the side wall portion at a position deeper than the step. delete The method according to claim 1,
Wherein the side wall part is formed to be inclined from the inner side to the outer side. delete The apparatus according to claim 1, wherein, on the rear surface of the primary reflector,
And a plurality of mounting rods protruding toward the rear side of the primary reflecting mirror and fixing the primary reflecting mirror to the frame are formed.

Images