CN109417105B - Power generation method of sunlight and solar heat composite power generation system by utilizing light-gathering type and flat plate type hybrid solar cell - Google Patents

Power generation method of sunlight and solar heat composite power generation system by utilizing light-gathering type and flat plate type hybrid solar cell Download PDF

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CN109417105B
CN109417105B CN201880002699.1A CN201880002699A CN109417105B CN 109417105 B CN109417105 B CN 109417105B CN 201880002699 A CN201880002699 A CN 201880002699A CN 109417105 B CN109417105 B CN 109417105B
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solar cell
solar
power generation
water pipe
pipe part
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CN109417105A (en
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金孝镇
郑求洛
金汪基
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Han Guoguangjishuyuan
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Han Guoguangjishuyuan
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    • H01L31/054—Optical elements directly associated or integrated with the PV cell, e.g. light-reflecting means or light-concentrating means
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    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Abstract

The invention discloses a sunlight and solar heat composite power generation system and a power generation method by utilizing a light-concentrating type and flat plate type hybrid solar cell. According to one embodiment of the present invention, there is provided a hybrid solar cell of a concentrating type and a flat panel type, including: a first solar cell comprising a flat-panel solar cell; a second solar cell including a concentrating solar cell; a first support part provided with the first solar cell; a second support part on which the second solar cell is disposed; and a lens part disposed on an upper side of the second solar cell, the first and second support parts being formed at different positions from each other.

Description

Power generation method of sunlight and solar heat composite power generation system by utilizing light-gathering type and flat plate type hybrid solar cell
Technical Field
The present invention relates to a hybrid power generation system and a hybrid power generation method that can simultaneously use sunlight and solar heat, and more particularly, to a hybrid solar cell using a concentrating type and a flat type.
Background
Recently, the reserves of conventional fossil fuels are reduced, environmental pollution due to fossil fuels becomes serious, and the use of environmentally friendly alternative energy is receiving much attention. In particular, solar cell modules using sunlight have been spotlighted as a powerful alternative energy source that can then replace conventional energy sources due to technologies accumulated through long-term research.
The installation capacity of such a solar cell module reaches about 30GW by 2010, and is expected to reach 100GW in 2020. In addition, in korea, the demand related to the solar cell module generates about 100MW level for 1 year, and the electricity production capacity using the solar cell module reaches about 1GW. In view of this domestic and foreign situation, the sunlight industry is expected to continue to grow thereafter.
As a power generation device utilizing solar energy, there are a solar power generation device converting solar energy into electric energy and a solar heat collection device collecting solar energy to a heat collection device and using the collected solar energy as heating or warm water.
Among them, unlike conventional power plants such as thermal power and nuclear power, a solar power generation apparatus has advantages of not consuming fossil fuel and not generating noise and pollution. Further, the solar power generation does not require a large-scale power generation facility, and therefore, has an advantage of being used for home use.
Recently, solar photovoltaic power generation technology is widely used in developed countries such as germany, japan, and the united states, and a method for promoting the spread of alternative energy is also revised and published in korea, and a concrete plan for performing solar photovoltaic power generation as 10000 households is becoming realistic.
In addition, in the conventional case, in the process of utilizing solar energy, solar light and solar heat are converted into electricity by different energy conversion mechanisms and used. In particular, the power generation technology using solar heat is limited to a level of collecting solar heat to produce domestic hot water, or a level of collecting solar heat using a large-unit heat collection system to rotate an engine to produce electric power.
Therefore, there is a need for developing a device capable of converting not only solar light and solar heat directly into electricity but also converting them into electricity in a composite manner, thereby improving the electrochemical efficiency of solar energy by 25% or more as compared with the conventional device.
On the other hand, a solar cell is a semiconductor that converts sunlight into electric energy by utilizing a Photovoltaic Effect (Photovoltaic Effect), and is roughly classified into a crystalline silicon solar cell, a thin-film solar cell, and a concentrating solar cell.
Among them, crystalline silicon solar cells are manufactured from silicon ingots, which are classified into a single crystal (single crystal) form and a polycrystalline (polycrystalline) form according to a manufacturing method of the silicon ingots. Silicon blocks are essentially p-n homojunctions (homojunctions) for use in solar cells. Single crystals are high quality materials with high purity and low crystalline defect density that can achieve high efficiency, but expensive, polycrystalline materials are produced in inexpensive processes to relatively low grade materials to produce cells with efficiencies that can be commercialized, but are inexpensive and inefficient. The theoretical maximum efficiency of crystalline silicon solar cells is reported to be about 25%, already at laboratory level with efficiencies close to this threshold. However, the efficiency of a battery (cell) manufactured for mass production using a single crystal or polycrystalline wafer is approximately 14% to 17%. In this case, 100% conversion efficiency means 1m 2 1KW of electricity is produced.
On the other hand, in solar power generation, the largest obstacle factor is excessive investment cost, and the economic efficiency is reduced compared to commercial development using other fossil raw materials. Most typically, thin-film solar cells and concentrating solar cells are available to reduce the price of such solar cells that are high in efficiency.
Thin film solar cells are manufactured by applying a semiconductor film to an inexpensive substrate such as glass, stainless steel, or plastic. Compared to crystalline silicon cells, thin film solar cells have the advantages of using less materials and being consistent through automation to module processes, but have the disadvantages of low efficiency and insufficient validation research related to the lifetime of the module. Since it is difficult to mass-produce thin-film solar cells due to technical difficulties, thin-film solar cells are not yet price competitive compared to crystalline silicon.
Further, the solar cell using the group iii-group v compound has an advantage of high efficiency of about 45%, but cannot be mass-produced in a large area due to the use of expensive materials. Thus, in the process of using a solar cell using a group iii-group v compound, a method of improving efficiency using a lens is used.
The concentrating solar cell concentrates light of a wide area on the solar cell by a Fresnel lens (Fresnel lens) or a mirror, and concentrates the light by about several times to several hundred times. The light-concentrating solar cell has an advantage in that the system price can be reduced by reducing the size of the solar cell with respect to the same area. However, the concentrating solar cell has disadvantages in that it is difficult to use scattered light when the concentration degree is increased, the direction of the sun needs to be constantly confirmed by a tracking device, and a cooling device is required. In particular, in korean climate, the light-concentrating system cannot sufficiently perform its function because of cloud, which is only about 100 days per year in sunny days, and thus is not suitable for work. In particular, the concentrating solar cell has a problem that the inverter stops operating when the brightness of direct sunlight decreases suddenly due to clouds or the like in the process of converting the concentrated solar cell into alternating current by the inverter (inverter).
Disclosure of Invention
(problems to be solved by the invention)
An object of the present embodiment is to provide a solar-thermal hybrid power generation system and a power generation method having high efficiency.
(measures taken to solve the problems)
According to one embodiment of the present invention, a hybrid solar cell of a concentrating type and a flat panel type is characterized by comprising: a first solar cell comprising a flat-panel solar cell; a second solar cell including a concentrating solar cell; a first support part on which the first solar cell is disposed; a second support part on which the second solar cell is disposed; and a lens part disposed on an upper side of the second solar cell, the first and second support parts being formed at different positions from each other.
According to another embodiment of the present invention, the first solar cell includes a plurality of first solar cell modules, and the plurality of first solar cell modules include silicon-based solar cells.
According to another embodiment of the present invention, the second solar cell includes a plurality of second solar cell modules, and the plurality of second solar cell modules include a group iii-group v compound.
According to another embodiment of the present invention, in order to improve light collecting efficiency, the solar cell module further includes a mirror portion having a plurality of second solar cell modules at a focal point.
According to another embodiment of the present invention, the lens portion is formed of one of a fresnel lens, a spherical lens, and a ball lens.
According to another embodiment of the present invention, the light condensing method is a point condensing method in which the focal point of the lens condenses light at one point and the condensing solar cell is located at the point position, and a line condensing method in which the light condenses light at one line and the solar cell is located on the line.
According to another embodiment of the present invention, a solar-thermal hybrid power generation system is characterized in that the hybrid power generation system includes a hybrid solar cell, and the hybrid solar cell includes: a first solar cell comprising a flat-panel solar cell; a second solar cell including a concentrating solar cell; a first support part provided with the first solar cell; a second support part on which the second solar cell is disposed; and a lens part disposed on the upper side of the second support part, the first support part being combined with the first water pipe part, the second support part being combined with the second water pipe part, the first support part and the second support part being formed at different positions from each other.
According to another embodiment of the present invention, a solar-thermal hybrid power generation system is characterized in that the hybrid power generation system includes a solar cell, and the solar cell includes: a first solar cell comprising a flat-panel solar cell; a first support part provided with the first solar cell; a second support part formed at a position different from the first support part; and a lens part disposed on the upper side of the second support part, the first support part being combined with the first water pipe part, and the second support part being combined with the second water pipe part.
According to another embodiment of the present invention, a distance between the lens part and the second support part is adjustable.
According to another embodiment of the present invention, the first support portion and the second support portion are insulated by a heat insulating portion.
In another embodiment of the present invention, a solar-thermal hybrid power generation method includes: a step of performing solar power generation by using a flat plate type first solar cell provided on an upper portion of the first support part; a step of generating solar light by using a light-collecting second solar cell disposed on the upper portion of the second support; and a step of transferring heat generated from the first solar cell to a coolant (water, antifreeze, etc.) flowing inside the water pipe portion, and allowing the transferred heat to enter the connected water pipe attached to the second solar cell again to additionally receive heat generated from the second solar cell, thereby heating water inside the water pipe portion.
(Effect of the invention)
As described above, according to an embodiment of the present invention, the concentrating and flat type solar cells are mixedly constructed, thereby having advantages of making up for the respective disadvantages and using only the advantages.
According to one embodiment of the present invention, the solar light and the solar heat can be simultaneously utilized for power generation.
According to an embodiment of the present invention, when direct light is irradiated, the water pipe portion through which the liquid such as the coolant flows is heated by solar heat while generating electricity by the solar light and the condenser lens using the high-efficiency condenser cell, and the liquid in the water pipe portion can be heated and the heated liquid can be used.
According to an embodiment of the present invention, in the case where direct light cannot be formed due to clouds, sunlight is received through the area of the flat type solar cell and the III-V solar cell without being condensed, and the water pipe portion is heated by solar heat, thereby having an advantage that the liquid in the water pipe portion can be heated and the heated liquid can be used.
Drawings
Fig. 1 is a diagram showing a structure of a conventional concentrating solar cell.
Fig. 2 is a diagram showing a structure of a conventional flat solar cell.
Fig. 3 is a diagram showing a structure of a solar-thermal hybrid power generation device using a conventional flat-plate solar cell.
Fig. 4 is a diagram showing the structure of a solar-thermal hybrid power generation device using a conventional concentrating solar cell.
Fig. 5 is a sectional view of a first embodiment of a solar-thermal hybrid power generation apparatus using a hybrid solar cell according to an embodiment of the present invention.
Fig. 6 is a view illustrating the structures of the first and second supporting parts according to one embodiment of the present invention.
Fig. 7 is a plan view of a first embodiment of a solar-thermal hybrid power generation apparatus using a hybrid solar cell according to an embodiment of the present invention.
Fig. 8 is a plan view of a first embodiment of a mirror portion according to an embodiment of the present invention.
Fig. 9 is a plan view of a second embodiment of a solar-thermal hybrid power generation apparatus using a hybrid solar cell according to an embodiment of the present invention.
Fig. 10 is a perspective view of a second embodiment of a mirror portion according to one embodiment of the present invention.
Fig. 11 is a plan view of a third embodiment of a solar-thermal hybrid power generation device according to an embodiment of the present invention.
Detailed Description
The present invention may be modified in various ways and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail. However, the present invention is not limited to the specific embodiments, and it should be understood that the present invention includes all modifications, equivalents, and alternatives included in the spirit and scope of the present invention. In the description of the drawings, like reference numerals are given to like structural elements.
The terms first, second, A, B, etc. may be used to describe various components, and the components are not limited to the terms. The above terms are only used to distinguish one structural element from other structural elements. For example, a first structural element may be termed a second structural element, and similarly, a second structural element may be termed a first structural element, without departing from the scope of the present invention. And/or these terms include a combination of the plurality of related recited items or some of the plurality of related recited items.
When a structural element is referred to as being "connected" or "coupled" to another structural element, it can be directly connected or coupled to the other structural element or intervening structural elements may also be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no other elements present between the two.
The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless otherwise defined herein, singular expressions include plural expressions. In the present application, the terms "including" or "having" and the like do not exclude the presence or addition of any feature, number, step, action, structural element, component or combination thereof described in the specification in advance.
Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Terms that are the same as words defined in commonly used dictionaries have meanings consistent with meanings possessed by context of the related art, and are not to be construed as ideal or excessive meanings unless explicitly defined in the present application.
Hereinafter, a solar-thermal hybrid power generation system and a power generation method using concentrating and flat hybrid solar cells according to the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a diagram showing a structure of a conventional concentrating solar cell.
Conventional concentrating solar cells improve efficiency by focusing sunlight using an additional lens, but have a disadvantage of being incapable of focusing other than direct light, and solar cells are generally manufactured using group iii-group v materials, and thus have a disadvantage of being expensive.
Fig. 2 is a diagram showing a structure of a conventional flat type solar cell.
The conventional flat-plate solar cell is manufactured using silicon without an additional lens, and thus has a disadvantage of low efficiency of electricity although it is inexpensive.
Fig. 3 is a diagram showing the structure of a solar-thermal hybrid power generation device using a conventional flat-plate solar cell. A solar-thermal hybrid power generation device using a conventional flat solar cell has a structure in which a silicon-based solar cell is formed in a flat plate shape, and a water tank including water heated by solar heat is provided in an upper portion thereof, so that the flow of the water heated by solar heat is smooth. The structure described above uses a low-cost silicon-based flat solar cell, and thus has advantages in terms of price, but has disadvantages in that the efficiency is reduced by having a solar efficiency of about 16% and a solar thermal efficiency of about 40%.
Fig. 4 is a diagram showing the structure of a solar-thermal hybrid power generation device using a conventional concentrating solar cell. The solar-thermal hybrid power generation device using the conventional concentrating solar cell has a disadvantage of being expensive and operating only in direct light, although it has a solar efficiency of about 30% and a high efficiency of about 50% because it uses a reflector plate having a structure capable of concentrating light.
In order to solve the above problems, the present invention discloses a hybrid solar cell configured with both a flat panel type and a light-condensing type.
Fig. 5 is a sectional view of a first embodiment of a solar-thermal hybrid power generation apparatus using a hybrid solar cell according to an embodiment of the present invention.
Referring to fig. 5, a solar-thermal hybrid power generation apparatus 100 using a hybrid solar cell according to an embodiment of the present invention includes a first solar cell 110, a second solar cell 120, a lens part 130, a first support part 140, a second support part 150, water pipe parts 161 and 162, a mirror part 170, and a heat insulation part 180. Further, the solar-thermal hybrid power generation apparatus 100 may further include a pump (not shown) and a control unit (not shown).
The first solar cell 110 may be formed of a flat type solar cell. The first solar cell may be composed of at least one of a Si-based solar cell, a CIGS solar cell, an organic solar cell, a dye-sensitized solar cell (dye-sensitized solar cell), perovskite (perovskite), and CdTe.
The first solar cell 110 may be composed of a plurality of first solar cell modules. In the case where the first solar cell 110 is configured by a plurality of first solar cell modules, there is an advantage that it is applicable to systems of various sizes.
The first solar cell 110 is combined with the upper surfaces of the plurality of first support parts 140. The first solar cell module may be formed on the entire surface of the first support part 140, and may be formed in a wider area than the first support part 140.
The second solar cell 120 is a concentrating solar cell, and may be formed of a solar cell based on a group iii-group v compound. A plurality of second solar cell modules 121 may be arranged to constitute the second solar cell 120. The second solar cell module 121 may be supported by a plurality of second support parts 150. The lower surface of the second solar cell module 121 may be provided with a substrate, preferably, the substrate is implemented by a material having good thermal conductivity.
The plurality of first supporting parts 140 and the second supporting parts 150 may be formed to have different heights from each other, the plurality of first supporting parts 140 may be disposed with a predetermined interval therebetween, and the second supporting parts 150 may be disposed between the predetermined intervals of the plurality of first supporting parts 140. The reason why the support portions 140 and 150 are arranged in this manner is that the hybrid solar cell is operated at maximum efficiency, and convection of water inside the heated water pipe portions 161 and 162 is improved.
The second support portion 150 is disposed such that at least a portion thereof is exposed to a space formed in the plurality of first support portions 140 at a predetermined interval.
The second support part 150 may be disposed to include only one second solar cell module 121, or may be disposed along the water pipe part to extend in the longitudinal direction.
The lens portion 130 may be disposed on the second solar cell 120. The lens unit 130 can be arranged in a form for point light collection (first embodiment) and a form for line light collection (second embodiment). The lens unit 130 may be composed of a plurality of lenses, and Fresnel lenses (Fresnel lenses), spherical lenses, ball lenses, or the like may be used as the lenses.
The sunlight condensed by the lens unit 130 is focused on a space formed in the first support unit 140 at a predetermined interval. When the lens portions 130 for performing the point light collection are disposed, sunlight is focused on the second solar cell module 121, and when the lens portions 130 for performing the line light collection are disposed, the entire sunlight is focused on a space formed in the first support portion 140 at a predetermined interval.
The focused sunlight is accurately focused on the respective second solar cell modules 121 by the mirror portion 170. In the case where the lens portions 130 for performing the spot light collection are arranged, the mirror portion 170 may have a circular cup shape as shown in fig. 8, and in the case where the lens portions 130 for performing the line light collection are arranged, the mirror portion 170 may have a shape elongated in the longitudinal direction as shown in fig. 10.
Fig. 10 is a perspective view of a second embodiment of a mirror portion according to one embodiment of the present invention.
As shown in fig. 10, when the mirror portion 170 has a shape elongated in the longitudinal direction, the second solar cell modules 121 are arranged in a plurality of lines (lines) in which the lines condense light, and the intervals therebetween can be adjusted due to installation characteristics.
The water pipe portion is a first water pipe portion 161 and a second water pipe portion 162.
Fig. 6 is a view illustrating the structures of the first and second supporting parts according to one embodiment of the present invention.
Preferably, the first water pipe part 161 is located at a lower surface of the first support part 140, and has a structure thermally coupled to the first support part 140. The first support part 140 may have a structure in which the first water pipe part 161 can be inserted, and may have a structure in which the first water pipe part 161 is coupled to the first support part 140. For thermal coupling, it is preferable to have a structure in which the first water pipe part 161 is inserted, and for better thermal coupling, a buffer 163 having low thermal resistance may be inserted together.
The second water pipe part 162 is positioned on the lower surface of the second support part 150, and may be formed in the same structure as the first water pipe part 161.
A pump (not shown) supplies power to cause water to flow into the water pipe portions 161 and 162. The water flowing through the first water pipe part 161 can be discharged to the outside of the second water pipe part 162, and can be introduced again into another first water pipe part through the second water pipe part 162. A pump (not shown) allows water to flow into the water pipe portions 161 and 162, and supplies power to the water pipe portion 162 so that the water is fed again into the other first water pipe portion.
The control unit (not shown) controls the flow of water in the water pipe portions 161 and 162. The control unit (not shown) includes a temperature sensor (not shown) and grasps the temperature of the water discharged from the second water pipe portion 162. The control unit (not shown) determines whether to directly discharge the water discharged from the second water pipe part 162 or to input the water again to another first water pipe part, according to whether the temperature of the water discharged from the second water pipe part 162 exceeds a preset reference value. When the temperature of the water discharged from the second water tube part 162 exceeds a preset reference value, the water discharged from the second water tube part 162 has a low cooling effect in a sufficiently heated state. Therefore, in this case, the controller (not shown) directly discharges the water discharged from the second water pipe 162. In contrast, when the temperature of the water discharged from the second hose part 162 does not exceed a preset reference value, the water discharged from the second hose part 162 is not sufficiently heated, and thus the cooling effect is still obtained. Therefore, the controller (not shown) re-feeds the water discharged from the second water pipe 162 to the other first water pipe. By discharging the cooling water heated at a high temperature at an appropriate time in such an operation, the solar-thermal hybrid power generation apparatus 100 can maintain an optimum cooling efficiency.
The control unit (not shown) includes an optical sensor (not shown), and changes a reference value for controlling the flow of water in the water pipe portions 161 and 162 according to the amount of received sunlight. When much sunlight reaches the solar-thermal hybrid power generation apparatus 100 as in a fine day without clouds, the first solar cell 110 and the second solar cell 120 can simultaneously generate power with high efficiency. In particular, when the amount of received sunlight is high, the second solar cell 120 can generate power with high efficiency. Therefore, when the amount of received sunlight detected by the optical sensor (not shown) is equal to or greater than a predetermined level, the control unit (not shown) increases the reference value to a temperature at which the second solar cell 120 can operate. For example, in the case where the second solar cell 120 is made of a III-V compound, the control unit (not shown) may set the reference value to 80 ℃ which is a temperature at which the second solar cell can operate. Conversely, when less sunlight reaches the solar-thermal hybrid power generation device 100, such as a cloudy day with many clouds, the first solar cell 110 can generate power at a high efficiency, and conversely, the second solar cell 120 can generate power at a low efficiency. Therefore, when the amount of received sunlight detected by the optical sensor (not shown) does not reach a predetermined level, the control unit (not shown) increases the reference value to only a temperature at which the first solar cell 110 can operate. Since the temperature at which the first solar cell 110 can operate is relatively lower than the temperature at which the second solar cell 120 can operate, the reference value for the day with a low light receiving amount is set lower than for the day with a high light receiving amount. For example, in the case of a day with a small amount of light, such as a cloudy day, the control unit (not shown) may set the reference value to about 40 ℃. As described above, the control unit (not shown) can control the solar-thermal hybrid power generation apparatus 100 so as to maintain the optimum cooling efficiency by appropriately setting the reference value according to the environment.
Fig. 7 is a plan view of a first embodiment of a solar-thermal hybrid power generation apparatus using a hybrid solar cell according to an embodiment of the present invention.
As shown in fig. 7, the first water pipe portion 161 is connected to the end of the second water pipe portion 162. The first and second water pipe parts 161 and 162 connected to each other are configured as one group, and each group can be configured in various forms due to the installation structure. Further, each support portion may be formed integrally with each water pipe portion.
Next, a method of generating solar power using the hybrid solar cell proposed in the present invention will be described.
In sunny days without clouds, sunlight reaches the ground by direct rays, and is scattered by the clouds in cloudy days, so that the sunlight cannot reach the ground by the direct rays. In the case of cloudy days, the flat type solar cell has a certain degree of power generation efficiency even if it is not sunlight of direct rays, and the concentration type solar cell fails to perform sunlight focusing, and thus has very low efficiency.
When there is direct light, the first solar cell 110 and the second solar cell 120 simultaneously generate solar power. The second solar cell 120 generates power with high efficiency, and the first solar cell 110 also generates power with high efficiency.
The first and second solar cells 110 and 120 generate electricity with high efficiency while releasing high heat. This heat is transferred to the first water pipe portion 161 and the second water pipe portion 162, and an effect of heating the water inside the water pipe portions is produced. That is, the liquid such as the refrigerant introduced into the first water tube part 161 (which means all the liquid including water that is easily heat-transferred) passes through the first water tube part 161 and is first heated by the heat generated in the first solar cell 110, and is further heated through the second water tube part 162. At this time, the first and second water pipe portions 161 and 162 may circulate the liquid without an additional pump through a height difference. The heated liquid can be provided to other external power generation devices for additional power generation and can also be provided for heat supply.
That is, while the first solar cell 110 and the second solar cell 120 generate solar power by direct sunlight on a clear day, the liquid in the water pipe portion is heated by solar heat that is not converted into electricity by the first solar cell 110 and the second solar cell 120.
The first and second water pipe portions 161 and 162 may include heat insulation portions therebetween, by which each water pipe portion may maximally hold heat.
On the other hand, in the case where the amount of received light is equal to or greater than the predetermined level, the control unit (not shown) sets a relatively high reference value and determines whether or not the temperature of the water discharged from the second water pipe portion 162 exceeds the set reference value. The controller (not shown) directly discharges the water discharged from the second water tube part 162 when the temperature of the water discharged from the second water tube part 162 exceeds a reference value, and the controller (not shown) drops the water discharged from the second water tube part 162 again into another first water tube part when the temperature of the water discharged from the second water tube part 162 does not exceed a set reference value.
In a day with clouds, direct light is not easily formed due to scattering caused by the clouds, and the solar power generation efficiency of the second solar cell 120 is reduced. In order to cope with such various weathers, the height between the lens part 130 and the second solar cell 120 may be adjusted. If the heights of the lens unit 130 and the second solar cell 120 can be adjusted, there is an advantage that the amount of energy of sunlight and solar heat can also be adjusted.
The control unit (not shown) may control the flow of water discharged from the second water pipe part 162 on a clear day. However, unlike the case of a clear day, the control unit (not shown) sets a relatively low reference value and performs control.
Fig. 11 is a plan view of a solar-thermal hybrid power generation device according to a third embodiment of the present invention.
The solar-thermal hybrid power generation device shown in fig. 11 has a structure in which the lens portion 130 described above optically condenses sunlight. The solar-thermal hybrid power generation device shown in fig. 11 has the same configuration as that of the second embodiment as a whole, except that the second solar cell 120 is not provided.
The first and second embodiments relating to the solar-thermal hybrid power generation device have a structure in which the water in the second water pipe portion 162 is heated by the heat generated from the second solar cell 120 or the heat condensed around the second solar cell.
The third embodiment relating to the solar-thermal hybrid power generation apparatus has a structure in which the heat of the sunlight condensed by the mirror portion 170 directly heats the second water pipe portion 162 without the second solar cell 120.
Although the present invention has been described above with reference to specific matters such as specific structural elements and a limited embodiment and drawings, the description is merely for the purpose of facilitating the overall understanding of the present invention, and the present invention is not limited to the above-described embodiment, and various modifications and variations can be made by those skilled in the art to which the present invention pertains from the description.
Therefore, the idea of the present invention is not limited to the above-described embodiments, and all technical solutions equivalent or equivalent to the scope of the claims including the scope of the claims belong to the scope of the idea of the present invention.
Cross-reference to related applications (CROSS-REFERENCE TO RELATED APPLICATION)
If the present patent application claims priority to patent application No. 10-2017-0054035, applied in korea, 04/27/2017, according to the us patent law 119 (a) clause (35u.s.c § 119 (a)), the entire content of which is incorporated herein by reference. Also, if this patent application claims priority to countries other than the United states for the reasons set forth above, the entire contents of this patent application are incorporated herein by reference.

Claims (6)

1. A solar-thermal hybrid power generation system is characterized by comprising a hybrid solar cell,
the hybrid solar cell includes:
a first solar cell comprising a flat-panel solar cell;
a second solar cell including a concentrating solar cell;
a first support part on which the first solar cell is disposed;
a second support part on which the second solar cell is disposed;
a lens unit provided above the second support unit; and
a reflector part, a light-emitting part and a light-emitting part,
the first supporting part is combined with the first water pipe part, the second supporting part is combined with the second water pipe part,
the first solar cell includes a plurality of first solar cell modules, the second solar cell includes a plurality of second solar cell modules, the reflector portion has a focus of the plurality of second solar cell modules,
the first support parts are arranged at a predetermined interval, the second support parts are arranged between the predetermined intervals, and the first support parts and the second support parts are formed at different heights from each other so that the first water pipe part and the second water pipe part have a relative height difference,
the liquid introduced into the first water pipe part is heated for the first time, the liquid flowing out of the first water pipe part flows into the second water pipe part and is further heated, the liquid flowing into the first water pipe part and the second water pipe part flows from the first water pipe part to the second water pipe part without an additional pump due to a height difference between the first water pipe part and the second water pipe part,
the distance between the lens part and the second support part can be adjusted,
the reflector portion has a shape elongated in a longitudinal direction, and the second solar cell module is arranged in a plurality of lines for collecting light rays.
2. The solar-thermal hybrid power generation system according to claim 1,
the plurality of first solar cell modules are formed of at least one of Si-based solar cells, CIGS solar cells, organic solar cells, dye-sensitized solar cells, perovskites, and CdTe solar cells.
3. The solar-thermal hybrid power generation system according to claim 2,
the plurality of second solar cell modules are solar cells containing a group iii-group v compound.
4. The solar-thermal hybrid power generation system according to claim 1, wherein the lens portion is formed of one of a fresnel lens, a spherical lens, and a spherical lens.
5. The solar-thermal hybrid power generation system according to claim 1, wherein the first support portion and the second support portion are each insulated by a heat insulating portion.
6. A combined solar-thermal power generation method using the combined solar-thermal power generation system according to claim 1, the combined solar-thermal power generation method comprising:
a step of generating solar light by using a flat first solar cell provided on an upper portion of the first support section;
a step of generating solar light by using a light-collecting second solar cell provided on an upper portion of the second support section; and
and heating the water in the water pipe portion by using the heat generated from the second solar cell.
CN201880002699.1A 2017-04-27 2018-02-23 Power generation method of sunlight and solar heat composite power generation system by utilizing light-gathering type and flat plate type hybrid solar cell Active CN109417105B (en)

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