CN101728978B - Solar system - Google Patents
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- CN101728978B CN101728978B CN200810171680A CN200810171680A CN101728978B CN 101728978 B CN101728978 B CN 101728978B CN 200810171680 A CN200810171680 A CN 200810171680A CN 200810171680 A CN200810171680 A CN 200810171680A CN 101728978 B CN101728978 B CN 101728978B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/60—Thermal-PV hybrids
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Abstract
The invention relates to a solar system comprising a reflection unit, a heat energy absorber and a first solar panel. The reflection unit is provided with a first energy gap solar cell and a reflection surface to reflect or converge sunlight; the reflection unit converts sunlight with a wave length shorter than or equal to x nanometer into electric energy according to the first energy gap solar cell and reflects or converges sunlight with a wave length longer than x nanometer to the heat energy absorber and the first solar panel; the heat energy absorber converts sunlight which is reflected by the reflection unit and has a wave length longer than or equal to y nanometer into heat energy; the heat energy absorber is provided with a first surface, liquid and a second surface; the liquid is positioned between the first surface and the second surface; and the first solar panel is provided with a second energy gap solar cell to convert sunlight which penetrates through the heat energy absorber and has a wave length shorter than or equal to z nanometer into electric energy, wherein y is larger than or equal to z, and z is larger than x.
Description
Technical field
The present invention relates to a kind of energy resource system, particularly relate to a kind of solar energy system.
Background technology
Solar energy is a kind of never exhausting and the free of contamination energy, when solution pollution that present fossil energy faced and problem of shortage, is the focus that attracts most attention always.Because solar panel (solar panel) has photovoltaic cell (photovoltaic cell, PV cell), makes solar panel directly transform light energy to be become electric energy.Yet how utilizing sunlight to make it have preferable photoelectric conversion efficiency fully is present considerable research topic.
In general, with the solar panel that silica-base material makes, its photoelectric conversion efficiency is generally 20～30%.Chief reason is that to be subject to its energy gap that can absorb and change usually be 1.1 electron-volts, that is is, the centre wavelength of the sunlight of its absorption is less than 1100nm, and wherein when wavelength during more less than 1100nm, its photoelectric conversion efficiency is poor more.So the sunlight that great majority expose on the solar panel just forms waste, in addition; Because the energy of most sunlight does not convert electric energy to, therefore, the convertible light of non-solar panel; Be convenient to form on the solar panel form of heat; And then the temperature of raising solar panel, wherein (high concentration photovoltaic, system HCPV) is the most serious with high efficiency concentrating solar panel.Therefore, a cooling device can be set usually, avoid the temperature of solar panel too high to keep the temperature of solar panel.Thus, just can increase cost in the making.
Therefore, existing solar energy system except the energy of failing to change effectively sunlight to improve the whole photoelectric conversion efficiency, more improved the cost of making because of having disposed cooling device.
Summary of the invention
The purpose of this invention is to provide a kind of solar energy system, it can provide preferable integral light photoelectric transformation efficiency, and has cheaper cost of manufacture.
For achieving the above object, the present invention proposes a kind of solar energy system, and it comprises a reflector element, a heat energy absorber and one first solar panel.Reflector element has one first energy gap solar cell and a reflecting surface.Reflector element is suitable for reflection or converge sunlight, and according to first energy gap solar cell wavelength is shorter than the sunlight that equals the x nanometer and converts electric energy to.Heat energy absorber is longer than the sunlight that equals the y nanometer with the wavelength that reflector element reflected and is converted heat energy to.The penetrable heat energy absorber of sunlight.Heat energy absorber has a first surface, a liquid and a second surface.Liquid is between first surface and second surface.First surface is towards reflecting surface.Second surface back-reflection face, and regard to first solar panel.First solar panel has one second energy gap solar cell, and is suitable for that according to second energy gap solar cell wavelength that penetrates heat energy absorber is shorter than the sunlight that equals the z nanometer and converts electric energy to.The energy gap of first energy gap solar cell is greater than the energy gap of second energy gap solar cell, and y ≧ z, z>x.
In one embodiment of this invention, solar energy system more comprises a heat absorption body.The heat absorption body is disposed on the first surface of heat energy absorber, and wherein the heat absorption body is suitable for absorbing wavelength and is longer than the sunlight that equals the y nanometer, and converts thereof into heat energy.
In one embodiment of this invention, solar energy system more comprises one second solar panel.Second solar panel is disposed on the heat absorption body, and has one the 3rd energy gap solar cell.Second solar panel is suitable for will converting electric energy to through sunlight wherein according to the 3rd energy gap solar cell.
In one embodiment of this invention, solar energy system more comprises a control device.Control device be suitable for according to reflector element position and time with the direction of control reflector element towards the sun.
In one embodiment of this invention, solar energy system more comprises a thermic electric installation.The thermal power transfer that the thermic electric installation is suitable for heat energy absorber is produced becomes electric energy.
In one embodiment of this invention; Because solar energy system uses the sunlight of reflector element and heat energy absorber difference conversion portion wavelength to be electric energy and heat energy; The sunlight wave band of wherein being changed is that non-first solar panel is mainly changed the wave band that sunlight is an electric energy; Therefore, under the photoelectric conversion efficiency that does not influence protosun ability system, more can improve whole photoelectric conversion efficiency.In addition,, therefore, need not use cooling device to cool off first solar panel because reflector element and heat energy absorber have sponged the energy of most sunlight, and the cost of manufacture that can save solar energy system.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts a plurality of embodiment, and conjunction with figs., specifies as follows.
Description of drawings
Figure 1A is the sketch map of the solar energy system of one embodiment of the invention.
Figure 1B is the partial enlarged drawing of the solar energy system that Figure 1A illustrated.
Fig. 1 C is the sketch map of the solar energy system of another embodiment of the present invention.
Fig. 2 A illustrates the spectral distribution graph into sunlight.
It is the spectrogram after the sunlight of an embodiment penetrates heat energy absorber that Fig. 2 B illustrates.
Fig. 2 C illustrates the spectrogram after sunlight for another embodiment penetrates heat energy absorber.
Fig. 3 illustrates the partial schematic diagram into the solar energy system of another embodiment.
The main element symbol description:
100: solar energy system
101: sunlight
110: reflector element
110a: reflecting surface
112: speculum
114,132: solar cell
120: heat energy absorber
120a: first surface
120b: second surface
122: liquid
130: the first solar panels
140: the heat absorption body
150: reflector
160: the second solar panels
170: control device
180: the thermic electric installation
182: heat engine
184: generator
E
G1: first energy gap
E
G2: second energy gap
E
G3: the 3rd energy gap
Embodiment
Figure 1A is the sketch map of the solar energy system of one embodiment of the invention, and Figure 1B is the partial enlarged drawing of the solar energy system that Figure 1A illustrated.Please be simultaneously with reference to Figure 1A and Figure 1B, the solar energy system 100 of present embodiment comprises a reflector element 110, a heat energy absorber 120 and one first solar panel 130.Reflector element 110 has one first energy gap E
G1A solar cell 114 and a reflecting surface 110a, and reflector element 110 is suitable for reflection or converge sunlight 101, and according to the first energy gap E of solar cell 114
G1Be suitable for wavelength is shorter than or the sunlight 101 that equals the x nanometer converts electric energy to.In addition, heat energy absorber 120 is suitable for the wavelength that reflector element 110 is reflected is longer than or the sunlight 101 that equals the y nanometer converts heat energy to, wherein y>x.Sunlight 101 is suitable for penetrating heat energy absorber 120.Heat energy absorber 120 has a first surface 120a, a liquid 122 and a second surface 120b.Liquid 122 is between first surface 120a and second surface 120b.First surface 120a is towards reflecting surface 110a.Second surface 120b back-reflection face 110a.First solar panel 130 has one second energy gap E
G2Solar cell 132.First solar panel 130 is according to the second energy gap E of solar cell 132
G2The wavelength that is suitable for penetrating heat energy absorber 120 is shorter than the sunlight 101 that equals the z nanometer and converts electric energy to, wherein the first energy gap E
G1Greater than the second energy gap E
G2, and y ≧ z, z>X.
Below will specify the relation of solar energy system 100 each member, and how solar energy system 100 moves.
In the present embodiment, reflector element 110 comprises at least one speculum 112 and at least one solar cell 114, and wherein solar cell 114 is disposed on the speculum 112, shown in Figure 1A.In detail, form the mode of solar cell 114 on speculum 112 and can be to use vapor deposition, sputter, coating, ink-jet or other suitable semiconductor fabrication process.In the embodiment that does not illustrate,, can directly replace speculum 112 if solar cell 114 is to be made on glass (or rigid) substrate.
In the present embodiment, solar cell 114 for example is to use non-crystal silicon solar cell, or energy gap is more than or equal to the first energy gap E
G1The solar cell that other are suitable.In one embodiment, the first energy gap E
G1Can be equal to or greater than 1.6 electron-volts.Because the energy gap of solar cell 114 is (like the first above-mentioned energy gap E
G1) be equal to or greater than 1.6 electron-volts, therefore, when sunlight 101 exposed to reflector element 110, photon energy was less than 110 reflections of mirror that just are suitable for being reflected of 1.6 electron-volts sunlight 101, and converged on the heat energy absorber 120.On the other hand, photon energy equals just to be suitable for being absorbed and converting electric energy to by solar cell 114 greater than 1.6 electron-volts sunlight 101.In one embodiment, can be coated with a selective reflecting coating (not illustrating), use wavelength is longer than sunlight 101 reflection that equals the x nanometer or is converged on the heat energy absorber 120 in solar cell 114 upper surface.
In other words, reflector element 110 is to utilize the energy gap of solar cell 114 that wavelength is shorter than or the sunlight 101 that equals the x nanometer converts electric energy to, and wherein the numerical value of x is looked closely the first energy gap E
G1Numerical value and decide.For instance, as the first energy gap E
G1Be 1.6 electron-volts, the numerical value of x then is 780nm.That is to say that reflector element 100 is suitable for most of wavelength being shorter than or the sunlight 101 that equals 780nm absorbs and converts electric energy to through solar cell 114.In addition; Reflector element 110 more can through above-mentioned selective reflecting coating with reflection assemble that wavelength is longer than or the sunlight that equals 780nm on the heat energy absorber 120 and first solar panel 130, and then improve the integral light photoelectric transformation efficiency of solar energy system 100.
It should be noted that; If weather is cloudy; Or reflector element 110 fails to reflect effectively or during converge sunlight 101; The solar cell 114 that is disposed at reflector element 110 still can and convert electric energy to sunlight partly 101 absorptions, makes solar energy system 100 when the cloudy day, still have preferable integral light photoelectric transformation efficiency.
In the present embodiment, speculum 112 can use level crossing or parabolic lens to come reflected sunlight 101, and its arrangement mode can be an arrayed, illustrates like Figure 1A.In detail; When using level crossing as the speculum 112 of reflector element 110; If suitably make these level crossings have an inclination angle (not illustrating) respectively can to make the sunlight 101 that is incident on the reflecting surface be able to reflex on the heat energy absorber 120, but and the sunlight behind the convergence reflex 101, wherein whether can assemble this sunlight or converge sunlight multiplying power and depend on that level crossing is arranged in the mode on the reflector element; Above-mentionedly be merely one for example, but be not limited thereto.Similarly, when using parabolic lens, also can reach above-mentioned purpose through the appropriate configurations mode as the speculum 112 of reflector element 110.
In the present embodiment, the configuration of solar cell 114 can account for 100% of speculum 112 entire areas, illustrates like Figure 1A.In another example, solar cell 114 can partly be disposed on the speculum 112, and wherein the gross area of solar cell 114 accounts for the ratio of the gross area of speculum 112 and can be between 1%～100%.In another embodiment, illustrate like Fig. 1 C, solar cell 114 for example is the gross area 50% that accounts for speculum 112.In detail, the ratio that the gross area of solar cell 114 accounts for the gross area of speculum 112 is looked closely user's demand and is decided, for example: the consideration of cost of manufacture or needed integral light photoelectric transformation efficiency etc.Therefore, Figure 1A and 1C are merely explanation, but are not limited thereto.
In another embodiment, reflector element 110 can be a reflective thin-film solar panels (not illustrating).In detail, reflective thin-film solar panels more can reflect the sunlight 101 less than its energy gap except that having the energy gap that is similar to above-mentioned solar cell 114, to reach the effect of above-mentioned speculum 112.Certainly; Suitably disposing the sunlight 101 that a plurality of reflective thin-film solar panels make its reflection all exposes on the heat energy absorber 120; Or the external form of reflective thin-film solar panels done suitable variation (for example being curved surface), can reach the purpose on sunlight 101 to the heat energy absorber 120 that makes after reflection is assembled equally.In addition, the upper surface of reflective thin-film solar panels more can be coated with like above-mentioned selective reflecting coating wavelength is longer than or is equaled sunlight 101 reflection of x nanometer or converge on the heat energy absorber 120.
In the present embodiment, the liquid 122 that is disposed in the heat energy absorber 120 for example is water, and wherein water can absorb the infrared band of the sunlight 101 that penetrates heat energy absorber 120, and the temperature of water is risen.That is to say that heat energy absorber 120 can convert the wavelength that penetrates wherein to heat energy greater than the sunlight 101 of y nanometer, wherein the numerical example of y 1100nm in this way.In addition, solar energy system 100 more can comprise a heat absorption body 140.Heat absorption body 140 is disposed on the first surface 120a of heat energy absorber 120, shown in Figure 1A and Figure 1B.In the present embodiment, heat absorption body 140 is suitable for the sunlight 101 of absorbing wavelength more than or equal to the y nanometer, and converts thereof into heat energy, wherein the numerical example of y 1100nm in this way.Certainly, along with the material of heat absorption body 130 is different, y also can be other suitable numerical value, and above-mentioned being merely illustrates.
Below be that 1100nm is as implementing example with y.That is to say; When sunlight 101 penetrates heat absorption body 140; Wavelength is absorbed major part ground more than or equal to the sunlight 101 of 1100nm and converts heat energy to by heat absorption body 140, and through promoting the water temperature in the heat energy absorber 120 with the good thermo-contact of first surface 120a.Need to prove; If suitably adjustment is disposed at the water yield in the heat energy absorber 120; It can be absorbed most ofly pass the sunlight 101 of its medium wavelength more than or equal to 1100 nanometers; And then after making sunlight 101 penetrate heat energy absorber 120, its wavelength can be reduced more than or equal to the light of 1100 nanometers significantly.Thus, solar energy system 100 can dispose above-mentioned heat absorption body 140, just can absorb the light wave of wavelength being longer than 1100nm most ofly.In other words, whether use heat absorption body 140 on the first surface 120a of heat energy absorber 120, look closely user's demand and decide, above-mentioned for illustrating, but be not limited thereto.
In the present embodiment, solar energy system 100 more comprises a reflector 150.Reflector 150 is disposed on the second surface 120b of heat energy absorber 120, and wherein reflector 150 is suitable for the sunlight that the y nanometer was longer than or was equaled to reflection wavelength.Present embodiment is that 1100nm implements example with y, but is not limited thereto.In detail; If desire to make the sunlight through heat energy absorber 120 to convert heat energy entirely to more than or equal to the wavelength of 1100nm; Or make the sunlight 101 that exposes on first solar panel 130 light less than the wavelength of 1100nm; Configurable above-mentioned reflector 150 is in the second surface 120b of heat energy absorber 120; Use the sunlight 101 of reflection wavelength, and then stop that wavelength is longer than or the sunlight 101 that equals 1100nm penetrates heat energy absorber 120 and exposes to first solar panel 130 more than or equal to 1100nm.
In the present embodiment, first solar panel 130 is according to the second energy gap E
G2The wavelength that is suitable for penetrating heat energy absorber 120 is shorter than or the sunlight 101 that equals the z nanometer converts electric energy to.In one embodiment, the second energy gap E
G2More than or equal to 1.1 electron-volts.For instance, the second energy gap E
G2When being 1.1 electron-volts, first solar panel 130 just is suitable for photon energy more than or equal to the second energy gap E
G2Sunlight 101 absorb and convert electric energy to.That is be, wavelength being shorter than the sunlight that equals 1100nm absorbing and conversion, this moment, 1100nm was the numerical value of z.In other words, along with the second energy gap E
G2Numerical value different, first solar panel 130 can absorb also can be different with the wave band of the sunlight of changing 101, more than for illustrating, but are not limited thereto.In the present embodiment, first solar panel 130 can be the silica-base material solar panel, and it can be the mono-crystalline silicon solar panel, or the polycrystalline silicon solar panel, or meets above-mentioned described solar panel.
In the present embodiment, solar energy system 100 more comprises one second solar panel 160.Second solar panel 160 is disposed on the heat absorption body 140 and has one the 3rd energy gap E
G3Solar cell (not illustrating) is shown in Figure 1A or 1B.In the present embodiment, the 3rd energy gap E
G3Greater than the first energy gap E
G1In one embodiment, the 3rd energy gap E
G3For example be more than or equal to 1.7 electron-volts.Second solar panel 160 is suitable for according to the 3rd energy gap E
G3To convert electric energy to through sunlight 101 wherein.In detail; Second solar panel 160 for example is to adopt dye sensitization of solar panel (Dye-Sensitized Solar Cell panel; DSSC panel) or organic solar panel (polymer organic ink solar panel) or other operating temperatures higher, and have the 3rd energy gap E
G3Solar panel.Above-mentioned for illustrating, non-ly be limited to this.
In the present embodiment, when reflector element 110 reflected sunlights 101 to second solar panels 160, second solar panel 160 is suitable for according to the 3rd energy gap E
G3Convert sunlight 101 to electric energy, wherein the 3rd energy gap E
G3With 1.7 electron-volts serves as to implement example.Therefore; Second solar panel 160 is suitable for absorbing photon energy more than or equal to 1.7 electron-volts sunlight 101; If photon energy is scaled optical wavelength; That is to say that the sunlight 101 that wavelength is shorter than 730nm can and convert electric energy to by 160 absorptions of second solar panel, to promote the integral light photoelectric transformation efficiency of solar energy system 100.
For the braking relation of solar energy system is detailed, the spy explains with Fig. 2 A～Fig. 2 C.Fig. 2 A illustrates the spectral distribution graph into sunlight, and wherein the longitudinal axis is expressed as luminous intensity, and transverse axis is expressed as optical wavelength and pairing photon energy thereof.It is the spectrogram after the sunlight of an embodiment penetrates heat energy absorber that Fig. 2 B illustrates, and Fig. 2 C illustrates the spectrogram after sunlight for another example penetrates heat energy absorber.Please first 2A with the aid of pictures, in general, the wavelength of sunlight 101 is the wave band of visible light by 380nm to 750nm, and in this wave band, has bigger luminous intensity, shown in Fig. 2 A.Yet, the solar panel of general silica-base material, its preferably the wavelength of photoelectric conversion efficiency be the sunlight between 750nm～1100nm.In other words, the sunlight 101 of its all band that exposes to the solar panel of silica-base material just can't be utilized effectively.In addition; If the solar irradiation to concentrate is incident upon on the solar panel,, can cause the temperature of solar panel to raise though can improve the photoelectric conversion efficiency of solar panel; And must dispose cooling device in addition, and then promote cost of manufacture with the reduction temperature that solar panel was raise.
Therefore; Solar energy system 100 of the present invention uses reflector element 110, heat energy absorber 120 and second solar panel 160 to absorb the wave band of the lower conversion of first solar panel, 130 efficient; And convert electric energy to; Except that the problem that can solve the said temperature rising, more can improve the integral light photoelectric transformation efficiency of solar energy system 100.
In detail, please be simultaneously with reference to Figure 1A with reference to figure 2B, Fig. 2 B illustrates to sunlight 101 unit 110 that is reflected reflects, and the sunlight 101 that reflects and penetrate second solar panel 160 and heat energy absorber 120 after spectrogram.Because reflector element 110 can absorb the first energy gap E
G1Optical wavelength and convert thereof into electric energy, and second solar panel can absorb the 3rd energy gap E
G2Optical wavelength, and heat energy absorber 120 can be longer than absorbing wavelength or equal the sunlight 101 of y nanometer, and converts thereof into heat energy.In the present embodiment, the first energy gap E
G1For example be 1.6 electron-volts, and the 3rd energy gap E
G3For example be 1.7 electron-volts, and the numerical example of y 1100nm in this way.Therefore, concentrate on 770nm～1100nm, illustrate like Fig. 2 B just penetrate the spectral intensity great majority of the sunlight 101 of heat energy absorber 120.Thus; Expose to the just spectrum shown in Fig. 2 B of spectral distribution of the sunlight of first solar panel 130; Therefore; Adopt above-mentioned configuration mode to make and win solar panel 130 except that having preferable photoelectric conversion efficiency, more can have preferable working temperature and the use of the cooling device of need not arranging in pairs or groups, and then save the cost of manufacture of solar energy system 100.
Need to prove that solar energy system 100 uses reflector elements 110, heat energy absorber 120 and second solar panel 160 except that can reaching above-mentioned advantage, the performance that more can improve whole photoelectric conversion efficiency.For example be: the reflector element 110 and second solar panel 160 can be directly convert the sunlight of its all band of part to electric energy; Though and heat energy absorber 120 only absorbs wavelength more than or equal to the light wave of 1100nm and convert heat energy to; Yet if collocation heat engine and generator just can become electric energy with thermal power transfer again, and then promote the integral light photoelectric transformation efficiency of solar energy system again.
In another example, if solar energy system 100 does not dispose second solar panel 160, after then sunlight 101 penetrated heat energy absorber 120, its spectral distribution then illustrated like Fig. 2 C.In detail, Fig. 2 C illustrates and is sunlight 101 unit 110 reflections that are reflected, and the sunlight 101 of reflection penetrates the spectrogram after the heat energy absorber 120.Because reflector element 110 is suitable for absorbing the first energy gap E
G1Optical wavelength and convert thereof into electric energy, and heat energy absorber 120 is suitable for the sunlight 101 of absorbing wavelength more than or equal to the y nanometer, and converts thereof into heat energy.In the present embodiment, the first energy gap E
G1For example be 1.6 electron-volts, and the numerical example of y 1100nm in this way.Therefore, concentrate on 380nm～1100nm, illustrate like Fig. 2 C just penetrate the spectral intensity great majority of the sunlight 101 of heat energy absorber 120.Thus, just expose to the spectrum of spectral distribution shown in Fig. 2 C of the sunlight of first solar panel 130.Comparison diagram 2A and Fig. 2 C can know respectively, though still have the wavelength of visible light of part to expose to first solar panel 130, the luminous intensity of this part is reflected unit 110 and 120 absorptions of heat energy absorber widely with utilizing.In other words, above-mentioned configuration mode still can make solar panel 130 have preferable photoelectric conversion efficiency and preferable working temperature and the use of the cooling device of need not arranging in pairs or groups, thereby saves the cost of manufacture of solar energy system 100.
Need to prove whether dispose second solar panel 160 in solar energy system 100, look closely user's demand and decide, for example is integral light photoelectric transformation efficiency, heat absorption efficient with the consideration between on the cost of manufacture.
In the present embodiment, solar energy system more can have a control device 170, shown in Figure 1A.Control device 170 be suitable for according to reflector element 110 positions and time with the direction of control reflector element 110 towards the sun.In detail; Position and asynchronism(-nization) along with the place; The height of the relative reflector element of the sun is also different with direction, and therefore, control unit 170 is suitable for adjusting the direction of reflector element 110 towards the sun according at that time time and position; Make reflector element 110 to reflect effectively or concentrated sunlight 101 to the heat energy absorber 120 and first solar panel 130 on, shown in Figure 1A.
In addition, Fig. 3 illustrates the partial schematic diagram into the solar energy system of another example.Please refer to Fig. 3, above-mentioned solar energy system 100 more can comprise a thermic electric installation 180, and wherein thermic electric installation 180 is connected with heat energy absorber 120, and is as shown in Figure 3.Thermic electric installation 180 is suitable for the thermal power transfer that heat energy absorber 120 is produced is become electric energy.In the present embodiment, thermic electric installation 180 for example is to be made up of a heat engine 182 and 184 in a generator, and wherein heat engine 182 and generator 184 mechanical connections are as shown in Figure 3.In detail; Heat engine 182 is suitable for absorbing the heat energy that the liquid 122 in the heat energy absorber 120 raises, and produces mechanical kinetic energy according to the conversion of the temperature difference, then; Drive a generator 184 heat energy that produces is changed into electric energy, and then improve the integral light photoelectric transformation efficiency of solar energy system 100.Above-mentioned being merely illustrates, and thermic electric installation 180 also can be other devices that are suitable for heat energy is changed into electric energy.
In sum; Solar energy system of the present invention uses the sunlight of reflector element and heat energy absorber difference conversion portion wave band to be electric energy and heat energy; And non-first solar panel of the optical band that reflector element and heat energy absorber are changed is mainly changed the wave band that sunlight is an electric energy; Therefore, can improve the whole photoelectric conversion efficiency of solar energy system.In addition, because the energy of subband sunlight has been changed or sponged to reflector element and heat energy absorber, therefore, solar energy system need not use cooling device to cool off first solar panel, and then can save the cost of manufacture of solar energy system.
Though the present invention with a plurality of embodiment openly as above; Right its is not in order to limit the present invention; Those skilled in the art under any; Do not breaking away from the spirit and scope of the present invention, when can doing a little change and retouching, so protection scope of the present invention is as the criterion when the protection range with claims.
Claims (13)
1. a solar energy system is characterized in that, comprising:
One reflector element has one first energy gap solar cell and a reflecting surface, with reflection or converge sunlight, and utilizes this first energy gap solar cell to convert electric energy to the sunlight that wavelength is shorter than or equal the x nanometer;
One heat energy absorber; The wavelength that is suitable for that this reflector element is reflected is longer than or the sunlight that equals the y nanometer converts heat energy to; Wherein this heat energy absorber has a first surface, a liquid and a second surface; This liquid is between this first surface and this second surface, and this first surface is towards this reflecting surface, and this second surface is back to this reflecting surface; And
One first solar panel; Have one second energy gap solar cell, and utilize this second energy gap solar cell to be shorter than with the wavelength that will penetrate this heat energy absorber or the sunlight that equals the z nanometer converts electric energy to, wherein this first energy gap is greater than this second energy gap; And y >=z, z＞x.
2. solar energy system according to claim 1 is characterized in that: more comprise a speculum, be arranged on this reflecting surface, and this first energy gap solar cell is disposed on this speculum, wherein this speculum is a level crossing or parabolic lens.
3. solar energy system according to claim 1 is characterized in that: this reflector element is a reflective thin-film solar panels.
4. solar energy system according to claim 3 is characterized in that: the upper surface of this reflective thin-film solar panels comprises a selective reflecting coating, with the sunlight reflection of wavelength being longer than the x nanometer or converge on this heat energy absorber.
5. solar energy system according to claim 1 is characterized in that: more comprise a heat absorption body, be disposed on the first surface of this heat energy absorber, but wherein the sunlight of y nanometer is longer than or is equaled to this heat absorption body absorbing wavelength, and convert thereof into heat energy.
6. solar energy system according to claim 1 is characterized in that: more comprise a reflector, be disposed on the second surface of this heat energy absorber that wherein this reflector is suitable for the sunlight that the y nanometer was longer than or was equaled to reflection wavelength.
7. solar energy system according to claim 1 is characterized in that: this first energy gap is more than or equal to 1.6 electron-volts.
8. solar energy system according to claim 1 is characterized in that: this second energy gap is more than or equal to 1.1 electron-volts.
9. solar energy system according to claim 5; It is characterized in that: more comprise one second solar panel; Be disposed on this heat absorption body and have one the 3rd energy gap solar cell, wherein this second solar panel utilizes the 3rd energy gap solar cell to convert electric energy to through sunlight wherein.
10. solar energy system according to claim 9 is characterized in that: the 3rd energy gap is more than or equal to 1.7 electron-volts, and the 3rd energy gap is greater than this first energy gap.
11. solar energy system according to claim 1 is characterized in that: this liquid is water.
12. solar energy system according to claim 1 is characterized in that: more comprise a control device, be suitable for according to this reflector element position and time to control the direction of this reflector element towards the sun.
13. solar energy system according to claim 1 is characterized in that: more comprise a thermic electric installation, the thermal power transfer that is suitable for this heat energy absorber is produced becomes electric energy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810171680A CN101728978B (en) | 2008-10-23 | 2008-10-23 | Solar system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810171680A CN101728978B (en) | 2008-10-23 | 2008-10-23 | Solar system |
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| CN101728978A CN101728978A (en) | 2010-06-09 |
| CN101728978B true CN101728978B (en) | 2012-08-29 |
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| CN200810171680A Expired - Fee Related CN101728978B (en) | 2008-10-23 | 2008-10-23 | Solar system |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6689949B2 (en) * | 2002-05-17 | 2004-02-10 | United Innovations, Inc. | Concentrating photovoltaic cavity converters for extreme solar-to-electric conversion efficiencies |
| CN101071002A (en) * | 2006-05-09 | 2007-11-14 | 南京工业大学 | Groove type light-gathering heat pipe type solar boiler device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6689949B2 (en) * | 2002-05-17 | 2004-02-10 | United Innovations, Inc. | Concentrating photovoltaic cavity converters for extreme solar-to-electric conversion efficiencies |
| CN101071002A (en) * | 2006-05-09 | 2007-11-14 | 南京工业大学 | Groove type light-gathering heat pipe type solar boiler device |
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| CN101728978A (en) | 2010-06-09 |
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