CN103489960B - A kind of photovoltaic generation utilizes method with the solar energy optimization that plant culture is worked in coordination with mutually - Google Patents
A kind of photovoltaic generation utilizes method with the solar energy optimization that plant culture is worked in coordination with mutually Download PDFInfo
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- CN103489960B CN103489960B CN201310431510.XA CN201310431510A CN103489960B CN 103489960 B CN103489960 B CN 103489960B CN 201310431510 A CN201310431510 A CN 201310431510A CN 103489960 B CN103489960 B CN 103489960B
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G7/00—Botany in general
- A01G7/04—Electric or magnetic or acoustic treatment of plants for promoting growth
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The present invention relates to technical field of solar utilization technique, the solar energy optimization that particularly a kind of photovoltaic generation and plant culture are worked in coordination with mutually utilizes method. First, determine the energy gap of solar cell, and adopt the roof of described solar cell as plant culture greenhouse, so that the part that in solar spectral, photon energy is greater than solar cell energy gap is for photovoltaic generation, the part that in solar spectral, photon energy is less than solar cell energy gap is simultaneously directly through solar cell, for the photosynthesis of plant. The method is not only conducive to improve solar energy utilization ratio, and practical, and result of use is good, popularization and use when being suitable for large area and cultivating.
Description
Technical field
The present invention relates to technical field of solar utilization technique, the solar energy optimization that particularly a kind of photovoltaic generation and plant culture are worked in coordination with mutually utilizes method.
Background technology
In the design and optimizing process of existing solar cell, because being subject to the restriction of Shockley-Queisser law, the efficiency of single PN kink solar cell cannot further improve, thereby various modern technologies, comprise that many knots of series connection technology, mid-gap technology, many excitons generation technique, converter technique and hot carrier collection technique are all used as the means that improve solar battery efficiency. Although these so-called third generation solar cells are beneficial for the efficiency that improves solar cell, cannot be promoted on a large scale and use because price is too high or technology is not mature enough.
In all above-mentioned designs and optimizing process, due to itself being optimized solar cell, and do not consider and carry out cooperate optimization with its environment around, the structure of solar cell is become increasingly complex, cost is more and more higher, thereby has limited large-scale promotion and the use of these technology.
Summary of the invention
The object of the present invention is to provide the solar energy optimization that a kind of photovoltaic generation and plant culture are worked in coordination with mutually to utilize method, the method is not only conducive to improve solar energy utilization ratio, and practical, and result of use is good.
For achieving the above object, technical scheme of the present invention is: a kind of photovoltaic generation utilizes method with the solar energy optimization that plant culture is worked in coordination with mutually. First, determine the energy gap of solar cell, then adopt the roof of described solar cell as plant culture greenhouse, so that the part that in solar spectral, photon energy is greater than solar cell energy gap is for photovoltaic generation, the part that in solar spectral, photon energy is less than solar cell energy gap is simultaneously directly through solar cell, for the photosynthesis of plant.
Further, described solar cell is single PN kink solar cell.
Further, distribute according to the absorption spectrum of solar spectral distribution and plant Determination of Chlorophyll a and chlorophyll b, calculate corresponding photovoltaic conversion efficiency and the chlorophyll absorption efficiency of solar cell with different energy gaps, and determine the energy gap of described solar cell according to result of calculation and different application targets.
Further, a kind of method of determining the energy gap of described solar cell is:
(1) be based upon in the situation that the energy gap of solar cell is different corresponding relation between photovoltaic conversion efficiency and chlorophyll absorption efficiency;
(2) minimum permission value x, the minimum permission value y of chlorophyll absorption efficiency of setting photovoltaic conversion efficiency, ensure that photovoltaic conversion efficiency is not less than setting value x, and chlorophyll absorption efficiency is not less than setting value y, determine the span of the energy gap of solar cell;
(3) set up the corresponding relation between photovoltaic conversion efficiency and chlorophyll absorption efficiency sum and the energy gap of solar cell;
(4), in the span of the energy gap of the solar cell obtaining in step (2), find value or the span of the energy gap of solar cell corresponding to photovoltaic conversion efficiency and chlorophyll absorption efficiency sum peak or higher range.
Further, the recommendation of described solar cell energy gap is 1.9 ~ 2.1eV.
The invention has the beneficial effects as follows by novelty optimal design and calculating cleverly, while making solar irradiation on solar cell, the part that in solar spectral, photon energy is greater than solar cell energy gap will be converted to luminous energy by solar cell, for photovoltaic generation; Meanwhile, the part that in solar spectral, photon energy is less than solar cell energy gap will directly see through solar cell, be absorbed by the plant in greenhouse, for the photosynthesis of plant, thereby reach the object of optimization solar energy utilization ratio. The present invention does not need to adopt the third generation solar cell technology of various complexity, only need to use the solar cell of single PN kink just can solar energy be used for to photovoltaic generation and plant culture simultaneously, realize solar energy highly effective conversion using, popularization and use when being suitable for large area and cultivating, have very high practical and popularizing value.
Brief description of the drawings
Fig. 1 is solar spectral distribution map when AM1.5 in the embodiment of the present invention.
Fig. 2 is the graph of a relation between photovoltaic conversion efficiency and the energy gap of solar cell of the single PN kink solar cell that in the embodiment of the present invention, the spectrum according to Fig. 1 calculates.
Fig. 3 is that the absorption coefficient of embodiment of the present invention Determination of Chlorophyll a and b is with the variation relation figure of wavelength.
Fig. 4 is the graph of a relation between embodiment of the present invention Determination of Chlorophyll absorption efficiency and the energy gap of solar cell.
When Fig. 5 is the energy gap difference of solar cell in the embodiment of the present invention, the graph of a relation (energy gap that the data in figure are solar cell, unit is eV) between photovoltaic conversion efficiency and the chlorophyll absorption efficiency of solar cell.
Fig. 6 is the graph of a relation between photovoltaic conversion efficiency and chlorophyll absorption efficiency sum and the energy gap of solar cell of solar cell in the embodiment of the present invention.
Fig. 7 is the schematic diagram of realizing of the embodiment of the present invention.
Detailed description of the invention
The invention provides the solar energy optimization that a kind of photovoltaic generation and plant culture work in coordination with mutually and utilize method, first, determine the energy gap of solar cell, and adopt the roof of described solar cell as plant culture greenhouse, so that the part that in solar spectral, photon energy is greater than solar cell energy gap is for photovoltaic generation, the part that in solar spectral, photon energy is less than solar cell energy gap is simultaneously directly through solar cell, for the photosynthesis of plant.
In the present embodiment, described solar cell is single PN kink solar cell, and does not need to adopt the third generation solar cell technology of various complexity.
Determine before the energy gap of described solar cell, first distribute according to the absorption spectrum of solar spectral distribution and plant Determination of Chlorophyll a and chlorophyll b, calculate corresponding photovoltaic conversion efficiency and the chlorophyll absorption efficiency of solar cell with different energy gaps, then determine the energy gap of described solar cell according to result of calculation and different application targets.
The present embodiment provides a kind of method of determining the energy gap of described solar cell:
(1) be based upon in the situation that the energy gap of solar cell is different corresponding relation between photovoltaic conversion efficiency and chlorophyll absorption efficiency;
(2) minimum permission value x, the minimum permission value y of chlorophyll absorption efficiency of setting photovoltaic conversion efficiency, ensure that photovoltaic conversion efficiency is not less than setting value x, and chlorophyll absorption efficiency is not less than setting value y, determine the span of the energy gap of solar cell;
(3) set up the corresponding relation between photovoltaic conversion efficiency and chlorophyll absorption efficiency sum and the energy gap of solar cell;
(4), in the span of the energy gap of the solar cell obtaining in step (2), find value or the span of the energy gap of solar cell corresponding to photovoltaic conversion efficiency and chlorophyll absorption efficiency sum peak or higher range.
In preferred embodiment of the present invention, the value of described solar cell energy gap is 1.9 ~ 2.1eV.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Solar spectral distribution map when Fig. 1 is AM1.5, Fig. 2 is the relation between photovoltaic conversion efficiency and the energy gap of solar cell of the single PN kink solar cell that calculates according to the spectrum of Fig. 1. As seen from Figure 2, when the energy gap of solar cell is different, the photovoltaic conversion efficiency of solar cell also becomes thereupon. Fig. 3 has provided the absorption coefficient of chlorophyll a and b with the variation relation of wavelength. As can be seen from the figure, chlorophyll a and b respectively have an absworption peak at Red and blue light place, therefore, we can be by changing the energy gap of solar cell, the luminous energy that sees through solar cell can be absorbed by chlorophyllous red light portion, for the photosynthesis of plant. Fig. 4 has provided the relation between the percentage of the luminous energy being absorbed by chlorophyll and the energy gap of solar cell. As seen from Figure 4, the energy gap of solar cell is larger, and the luminous energy that sees through solar cell is just more, and the percentage of the luminous energy being absorbed by chlorophyll is also just larger. But can find out again from Fig. 2, when the energy gap of solar cell is greater than 1.2eV, because the luminous energy through solar cell is too many, the photovoltaic conversion efficiency of solar cell increases the energy gap along with solar cell and reduce. Therefore, a good design must be traded off in the selection of solar cell energy gap.
For this reason, when Fig. 5 has provided the energy gap difference of solar cell, the relation between photovoltaic conversion efficiency and the chlorophyll absorption efficiency of solar cell. Data in figure on curve are the energy gap of solar cell, and unit is eV. As can be seen from Figure 5, when the energy gap of solar cell is less than 1.8eV, the percentage of the luminous energy that chlorophyll absorbs is almost nil. Therefore, collaborative in order to reach the two, thus the object of optimization solar energy utilization ratio, the energy gap of solar cell must be greater than 1.8eV. In the time that the energy gap of solar cell is greater than 1.8eV, along with the increase of the energy gap of solar cell, the photovoltaic conversion efficiency of solar cell reduces gradually, but chlorophyllous absorption efficiency, photosynthetic efficiency increases gradually.
Fig. 6 has provided the percentage sum (being the comprehensive utilization ratio of solar energy) of the photovoltaic conversion efficiency of solar cell and the luminous energy of chlorophyll absorption with the variation of the energy gap of solar cell. As can be seen from Figure 6, in the time that the energy gap of solar cell is greater than 1.2eV, the photovoltaic efficiency of solar cell just reduces gradually. But in the time that the energy gap of solar cell is greater than 1.8eV, due to adding of photosynthesis of plant, along with the increase of the energy gap of solar cell, the photovoltaic conversion of solar cell and the efficiency sum of photosynthesis of plant progressively increase, and this shows that the present invention can improve the utilization rate of solar energy significantly. Complex chart 5 and Fig. 6 are known, and the energy gap of solar cell is 1.9 to 2.1eV time, and its comprehensive benefit is best.
Fig. 7 has provided the principle that realizes of the embodiment of the present invention. Roof using solar cell as greenhouse in figure, in the time that sunshine is mapped on solar cell, the short part of wavelength is absorbed and is converted into electric energy by solar cell, and the long part of ripple is absorbed by the chlorophyll of plant, offers the required energy of photosynthesis of plant. In figure, photronic heat radiation refers to that solar cell is in the lower radiation producing of room temperature (operating temperature), and this is a kind of loss of energy, and we have counted this point in the time calculating the photovoltaic efficiency of solar cell.
In the above-described embodiments, only have red light portion could see through solar cell. Therefore, grow up for making plant health, the LED that we also need to add blue in greenhouse carries out light filling, and a part for the electric energy that solar cell produces can be used as the energy of light filling. Because light filling part is repeatedly mentioned in other invention and document, therefore, it is not emphasis of the present invention, is not described in detail in this.
Be more than preferred embodiment of the present invention, all changes of doing according to technical solution of the present invention, when the function producing does not exceed the scope of technical solution of the present invention, all belong to protection scope of the present invention.
Claims (3)
1. the solar energy optimization that photovoltaic generation and plant culture are worked in coordination with mutually utilizes a method, it is characterized in that:Determine the energy gap of solar cell, and adopt the roof of described solar cell as plant culture greenhouse,So that the photon that in solar spectral, photon energy is greater than solar cell energy gap is for photovoltaic generation, simultaneouslyThe photon that in solar spectral, photon energy is less than solar cell energy gap, directly through solar cell, is usedIn the photosynthesis of plant;
Distribute according to the absorption spectrum of solar spectral distribution and plant Determination of Chlorophyll a and chlorophyll b, calculateGo out to have corresponding photovoltaic conversion efficiency and the chlorophyll absorption efficiency of solar cell of different energy gaps, and rootDetermine the energy gap of described solar cell according to result of calculation and different application targets; Determine described solar energyThe method of the energy gap of battery is:
(1) be based upon in the situation that the energy gap of solar cell is different photovoltaic conversion efficiency and chlorophyllCorresponding relation between absorption efficiency;
(2) the minimum permission value x of setting photovoltaic conversion efficiency, the minimum permission of chlorophyll absorption efficiency are gotValue y, ensures that photovoltaic conversion efficiency is not less than setting value x, and chlorophyll absorption efficiency is not less than setting value y,Determine the span of the energy gap of solar cell;
(3) set up photovoltaic conversion efficiency and chlorophyll absorption efficiency sum and solar cell energy gap itBetween corresponding relation;
(4), in the span of the energy gap of the solar cell obtaining in step (2), find photovoltaic to turnChange the energy gap of solar cell corresponding to efficiency and chlorophyll absorption efficiency sum peak or higher rangeValue or span.
2. a kind of photovoltaic generation according to claim 1 is optimized profit with the solar energy that plant culture is worked in coordination with mutuallyBy method, it is characterized in that: described solar cell is single PN kink solar cell.
3. a kind of photovoltaic generation according to claim 1 is optimized profit with the solar energy that plant culture is worked in coordination with mutuallyBy method, it is characterized in that: the value of described solar cell energy gap is 1.9～2.1eV.
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| CN110291896A (en) * | 2018-03-23 | 2019-10-01 | 长春市农业机械研究院 | A kind of hothouse plants Efficient Cultivation illumination control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101836566A (en) * | 2009-03-18 | 2010-09-22 | 光宝科技股份有限公司 | Solar greenhouse structure and thin-film solar cell module thereof |
| CN102550334A (en) * | 2012-02-15 | 2012-07-11 | 福建农林大学 | Multifunctional plant cultivation facility for integrating photovoltaic power generation and characteristic spectrum illumination |
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| WO2004094748A1 (en) * | 2003-04-23 | 2004-11-04 | Kaneka Corporation | Complex system of vegetation and solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101836566A (en) * | 2009-03-18 | 2010-09-22 | 光宝科技股份有限公司 | Solar greenhouse structure and thin-film solar cell module thereof |
| CN102550334A (en) * | 2012-02-15 | 2012-07-11 | 福建农林大学 | Multifunctional plant cultivation facility for integrating photovoltaic power generation and characteristic spectrum illumination |
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