CN112821852A - Even light type photovoltaic agricultural system - Google Patents

Even light type photovoltaic agricultural system Download PDF

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Publication number
CN112821852A
CN112821852A CN202110167002.XA CN202110167002A CN112821852A CN 112821852 A CN112821852 A CN 112821852A CN 202110167002 A CN202110167002 A CN 202110167002A CN 112821852 A CN112821852 A CN 112821852A
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China
Prior art keywords
solar photovoltaic
photovoltaic panel
glass plate
light splitting
agricultural system
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CN202110167002.XA
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Chinese (zh)
Inventor
陈方才
刘�文
张昕昱
郑佳楠
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University of Science and Technology of China USTC
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University of Science and Technology of China USTC
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S20/00—Supporting structures for PV modules
    • H02S20/10—Supporting structures directly fixed to the ground
    • 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
    • A01G22/00—Cultivation of specific crops or plants not otherwise provided for
    • 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
    • A01G25/00—Watering gardens, fields, sports grounds or the like
    • 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
    • A01G7/06—Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
    • 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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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Botany (AREA)
  • Engineering & Computer Science (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Wood Science & Technology (AREA)
  • Water Supply & Treatment (AREA)
  • Greenhouses (AREA)

Abstract

The invention discloses a uniform light type photovoltaic agricultural system which can perform photovoltaic power generation under the condition of not influencing the growth of vegetation on the farmland and solve the problem of light contention between plants and a photovoltaic panel. This even light type photovoltaic agricultural system includes the support, first solar photovoltaic board, second solar photovoltaic board and indent beam split glass board top-down install side by side on the support in proper order, the second solar photovoltaic board with there is the clearance between indent beam split glass board and the first solar photovoltaic board. The upper surface of the pressure groove light splitting glass plate is a plane, the lower surface of the pressure groove light splitting glass plate is provided with a pressure groove array, the pressure groove array is obtained by cutting and translating through a specific free curved surface, and when sunlight successively passes through the upper surface and the lower surface of the pressure groove light splitting glass plate, light rays uniformly irradiate projection areas along the light irradiation direction under the first solar photovoltaic plate, the second solar photovoltaic plate and the pressure groove light splitting glass plate.

Description

Even light type photovoltaic agricultural system
Technical Field
The invention relates to the technical field of crossing of solar photovoltaic power generation and agriculture, in particular to a uniform-light type photovoltaic agricultural system.
Background
The per-capita farming area of China is only 1.38 mu, which is less than 40% of the average level in the world. How to efficiently utilize precious cultivated land resources to bring more benefits to people has important significance for pulling rural economic development. In recent years, with the increase of the power generation efficiency of the solar photovoltaic panel, a photovoltaic agricultural system compatible with 'land + power generation' provides a brand new technical route for efficiently utilizing cultivated land resources.
In all seasons of the year, the solar altitude at any point of the earth is constantly changed, the solar altitude is high in summer and low in winter. At present, the main problems of photovoltaic agricultural systems are: 1. the solar photovoltaic panel shields the sunlight, so that crops in a bottom projection area cannot grow normally because the light intensity does not reach the photosynthesis compensation point, and the design can cause a yin-yang staggered area in the farmland in summer, so that the crops grow unevenly; 2. for preventing the projection that the photovoltaic board produced under the low solar altitude angle shelters from the back row, need set up the row spacing of solar photovoltaic board array great to the total amount of generating electricity on per mu soil has been restricted.
In the past, the photovoltaic agricultural systems at home and abroad improve the illumination condition of crops by adding a light splitting plate in the middle of a solar photovoltaic plate. However, this method cannot solve the problem of the large line pitch of the solar photovoltaic panel array.
Disclosure of Invention
The invention provides a light-homogenizing photovoltaic agricultural system, which is formed by a groove pressing light splitting glass plate, a first solar photovoltaic plate and a second solar photovoltaic plate. The device mainly solves the following two problems: on one hand, crops under the photovoltaic panel are covered by the shadow of the photovoltaic panel and cannot grow well; on the other hand, when the season is in winter, after the solar photovoltaic panel assembly is illuminated, the shadow area of the solar photovoltaic panel assembly can cover the solar photovoltaic panel assembly behind the solar photovoltaic panel assembly, and the power generation amount of the solar photovoltaic panel is influenced.
The technical scheme adopted by the invention is as follows: the utility model provides a dodging type photovoltaic agricultural system, includes the support, solar photovoltaic board subassembly comprises first solar photovoltaic board, second solar photovoltaic board and indent beam splitting glass board, first solar photovoltaic board, second solar photovoltaic board and indent beam splitting glass board top-down install side by side in proper order on the support.
Further, the area ratio of the first solar photovoltaic panel, the second solar photovoltaic panel and the pressure groove light splitting glass plate is 1: 1: x is 0.5-1.5, preferably 1.
Furthermore, gaps with certain width are formed between the second solar photovoltaic panel and the first solar photovoltaic panel as well as between the pressure groove light splitting glass plates, and the widths of the two gaps are equal.
Furthermore, the indent split glass plate is made of a high-transmittance glass material, the upper surface of the indent split glass plate is a plane, and the lower surface is provided with an indent array.
Further, the cross section of the indent consists of a plane and a segmented free-form surface.
Furthermore, the plane width of the indent is a, and is perpendicular to the upper surface of the indent spectroscopic glass plate, and the interval between two adjacent indents is 0.
Further, the indent array is formed by segmenting and translating a specific free-form surface, and the specific free-form surface is an initial surface type of the lower surface of the indent spectroscopic glass plate which meets the uniform spectroscopic requirement.
Further, the mathematical model of the indent array is:
Figure BDA0002935248690000021
wherein,
Figure BDA0002935248690000022
for this unit vector of the incident ray on the particular free-form surface,
Figure BDA0002935248690000023
for this purpose the unit vector of the outgoing ray on the particular free-form surface,
Figure BDA0002935248690000024
for this purpose, the normal vector, k, at the point of incidence of a ray on a particular free-form surfaceiAs vectors
Figure BDA0002935248690000025
The slope magnitude of (a); miIs the intersection point of sunlight and a specific free curved surface, MiHas a coordinate of Mi(Mxi,Myi) And Mxi＝i(i＝0、1、2…)， My0＝0；NiIs the intersection of the ray with the farmland, NiHas the coordinate of Ni(Nxi,Nyi) And is and
Figure BDA0002935248690000026
Mi' is the intersection of a ray with the array of indentations, Mi'coordinate is M'i(Mxi,My′i) (ii) a Theta is the inclination angle of the pressure groove light splitting glass plate relative to the farmland, h is the height of the pressure groove light splitting glass plate relative to the farmland, n0Is the refractive index of air, n1Is the refractive index of the glass medium; "[]"is an integer symbol.
The principle that the groove pressing light splitting glass plate uniformly irradiates sunlight on the farmland is briefly described as follows: the sunlight can be regarded as uniformly distributed parallel light, because the light is vertically incident on the upper surface of the indent light-splitting glass plate, the propagation path of the light is not changed after the light passes through the upper surface of the indent light-splitting glass plate. When light propagates to the lower surface of the depressed trench spectroscopic glass plate, according to snell's law: n is1*sinθ1＝n2*sinθ2(n1Is the refractive index of the spectroscopic glass plate, theta1The angle of incidence of a light ray on the interface, n2Is the refractive index of air, theta2The exit angle of the light on the interface), the propagation path of the light changes, and the light can be refracted to the lower part of the solar photovoltaic panel componentThe projection area of (2). After the included angle between the incident light and the lower surface of the groove pressing light splitting glass plate is determined, the included angle between the emergent light and the lower surface of the groove pressing light splitting glass plate can be accurately calculated. When the inclination angle of the solar photovoltaic panel component relative to the farmland, the size of the projection area of the solar photovoltaic panel component on the farmland and the height of the solar photovoltaic panel component relative to the farmland are known, the intersection point position of the emergent ray and the farmland can be accurately obtained. Therefore, the intersection point position of the light and the farmland can be changed by designing the surface type parameters of each position of the lower surface of the groove pressing light splitting glass plate, so that the sunlight is uniformly distributed on the farmland.
Most land areas of our country are in the areas north of the return line of north, and the maximum value of the annual solar altitude of each area is reduced along with the rise of the latitude; and the solar altitude is changing all the year round, low in winter and high in summer. In order to ensure that the annual electricity generation quantity of solar photovoltaic is not basically influenced by the change of the solar altitude angle, the uniform-light type photovoltaic agricultural system can meet the following conditions: in winter solstice, the altitude of the sun is lowest for the northern hemisphere. At the moment, the shadow area generated by the previous dodging photovoltaic agricultural system under illumination completely covers the pressure groove light splitting glass plate and does not cover the first solar photovoltaic plate and the second solar photovoltaic plate. The above conditions can be realized by setting a specific inclination angle of the solar photovoltaic panel assembly and the distance between each group of uniform photovoltaic agricultural systems. Taking the northriver peace area as an example, the optimal inclination angle of a local photovoltaic panel relative to a horizontal plane is 32 degrees, the size of a solar photovoltaic panel is 1622mm 1068mm 35mm, when the generated energy of the photovoltaic panel is not influenced all the year round, the minimum distance between the front and the back of the uniform photovoltaic agricultural system is about 1.18m, the machine installation amount per mu is 106 sets, and the generated energy which can be realized per mu all the year round is about 8.1 ten thousand degrees (under the illumination condition of the northriver peace area); the maximum machine loading amount of the original light-splitting type uniform photovoltaic agricultural system per mu of land is 69 sets, and the electricity generation amount which can be realized per mu of land in a whole year is about 5.3 ten thousand DEG electricity. Compared with the original light-splitting uniform photovoltaic agricultural system, the annual power generation amount of each mu of land of the novel uniform photovoltaic agricultural system is improved by 2.8 ten thousand DEG electricity.
The uniform-light type photovoltaic agricultural system can ensure that the annual yield of crops under the solar photovoltaic panel cannot be greatly influenced. Because the inclination angle value of the solar photovoltaic panel component is fixed, light spots under the solar photovoltaic panel component can move along with the change of the solar altitude angle. When sunlight vertically enters the solar photovoltaic panel component, no shadow area exists on the farmland. When sunlight obliquely enters the solar photovoltaic panel component, the whole light spot on the farmland can move to the south or the north along with the sunlight, so that the photosynthesis of crops is basically not greatly influenced. In winter, most crops are in a dormant or non-farming period due to cold weather, so that sunlight cannot be received on the farmland and the annual yield of the crops cannot be greatly influenced, and the uniform-light photovoltaic agricultural system ensures the annual yield of the crops.
The solar photovoltaic panel component has a certain inclination angle, and rainwater can slide down along the upper surface of the solar photovoltaic panel component when raining. Because there is the clearance of certain width between second solar photovoltaic board and indent beam split glass board and the first solar photovoltaic board, the rainwater can fall down from the twice clearance to the realization is to the watering of crops under the solar photovoltaic board subassembly.
Gaps of a certain size exist between the second solar photovoltaic panel and the pressure groove light splitting glass plate as well as between the second solar photovoltaic panel and the first solar photovoltaic panel, and the wind pressure in the uniform light type photovoltaic agricultural system is favorably reduced, so that the cost expenditure of the support in the system is reduced.
Compared with the prior art, the invention has the beneficial effects that: the sunlight is split through the groove pressing light splitting glass plate, the sunlight transmitted from the front part can be uniformly distributed under the solar photovoltaic panel component, the photosynthesis of crops is facilitated, and the annual yield of the crops is ensured; the solar photovoltaic panel can be illuminated all the year round and cannot be shielded by a shadow area generated by the solar photovoltaic panel in front, so that the annual power generation amount of a single solar photovoltaic panel is improved; meanwhile, compared with the original photovoltaic agricultural system, the dodging photovoltaic agricultural system can increase the number of solar photovoltaic panels in a unit area, so that the generating capacity of each mu of land is increased; two gaps between the second solar photovoltaic panel and the pressing groove light splitting glass panel as well as between the second solar photovoltaic panel and the first solar photovoltaic panel realize the irrigation of crops under the solar photovoltaic panel assembly in rainy days; the gap is also beneficial to reducing the wind pressure in the uniform light type photovoltaic agricultural system, so that the cost of the support in the system is reduced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a dodging photovoltaic agricultural system;
FIG. 2 is a cross-sectional view of a grooved spectroscopic glass plate;
FIG. 3 is a schematic view of the principle of light splitting of a grooved light-splitting glass plate;
FIG. 4 is a schematic view of a solar photovoltaic panel assembly with sunlight vertically incident thereon;
FIG. 5 is a schematic view of an illuminated state of the uniform photovoltaic agricultural system during winter solstice;
FIG. 6 is a schematic view of precipitation of a dodging photovoltaic agricultural system during rainy days;
fig. 7 is another schematic structural diagram of the dodging photovoltaic agricultural system.
In the figure: 1-a scaffold; 2-solar photovoltaic panel component; 21-a first solar photovoltaic panel; 22-a second solar photovoltaic panel; 23-pressing a groove light splitting glass plate; 3-clearance; 4-high transmittance glass; 40-pressing the upper surface of the groove spectroscopic glass plate; 41-pressing a groove; 410-plane; 411-segmented free-form surface; 5-sunlight; 6-farming land; 7-rain water.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example one
The uniform-light type photovoltaic agricultural system comprises a support 1 and a solar photovoltaic panel assembly 2 on the support 1, wherein the solar photovoltaic panel assembly 2 comprises a first solar photovoltaic panel 21, a second solar photovoltaic panel 22 and a pressure groove light splitting glass panel 23, the pressure groove light splitting glass panel 23 achieves the light splitting effect on sunlight, the pressure groove light splitting glass panel 23 is arranged on the lower side edge of the second solar photovoltaic panel 22, the widths of the first solar photovoltaic panel 21, the second solar photovoltaic panel 22 and the pressure groove light splitting glass panel 23 are all 1.07m, and 5mm wide gaps exist between the second solar photovoltaic panel 22 and the first solar photovoltaic panel 21 and between the second solar photovoltaic panel 22 and the pressure groove light splitting glass panel 23.
As shown in fig. 2, the indent spectroscopic glass plate 23 is made of high transmittance glass 4, and the upper surface 40 of the indent spectroscopic glass plate is a plane and the lower surface is an indent array. The indent 41 is composed of a flat surface 410 and a segmented free-form surface 411.
The mathematical model of the indent array is:
Figure BDA0002935248690000051
wherein,
Figure BDA0002935248690000052
for this unit vector of the incident ray on the particular free-form surface,
Figure BDA0002935248690000053
for this purpose the unit vector of the outgoing ray on the particular free-form surface,
Figure BDA0002935248690000054
for this purpose, the normal vector, k, at the point of incidence of a ray on a particular free-form surfaceiAs vectors
Figure BDA0002935248690000055
The slope magnitude of (a); miIs the intersection point of sunlight and a specific free curved surface, MiHas a coordinate of Mi(Mxi,Myi) And Mxi＝i(i＝0、1、2…)， My0＝0；NiIs the intersection of the ray with the farmland, NiHas the coordinate of Ni(Nxi,Nyi) And is and
Figure BDA0002935248690000056
Mi' is the intersection of a ray with the array of indentations, Mi'coordinate is M'i(Mxi,My′i) (ii) a Theta is the inclination angle of the pressure groove light splitting glass plate relative to the farmland, h is the height of the pressure groove light splitting glass plate relative to the farmland, n0Is the refractive index of air, n1Is the refractive index of the glass medium; "[]"is an integer symbol.
As shown in fig. 3, the principle that the indent splitting glass plate 23 can uniformly irradiate the direct sunlight 5 on the farmland 6 is as follows: the sunlight 5 can be regarded as uniformly distributed parallel light, because the light is vertically incident on the upper surface 40 of the indent split glass plate, the propagation path of the light is not changed after the light passes through the upper surface 40 of the indent split glass plate. When the light propagates to the indent 41 of the indent splitting glass plate, according to snell's law: n is1*sinθ1＝n2*sinθ2(n1Is the refractive index of the spectroscopic glass plate, theta1The angle of incidence of a light ray on the interface, n2Is the refractive index of air, theta2The exit angle of the light at the interface) and the propagation path of the light changes, so as to illuminate the projection area under the solar photovoltaic panel assembly 2. After the included angle between the incident light and the indent 41 of the indent splitting glass plate 23 is determined, the included angle between the emergent light and the indent 41 of the indent splitting glass plate 23 can be accurately calculated. When the inclination angle of the solar photovoltaic panel component 2 relative to the farmland 6, the size of the projection area of the solar photovoltaic panel component 2 on the farmland 6 and the height of the solar photovoltaic panel component 2 relative to the farmland 6 are known, the intersection point position of the emergent ray and the farmland 6 can be accurately obtained. Therefore, by designing the surface type parameters of each part of the indent 41 of the indent splitting glass plate 23, the intersection point position of the light and the farmland 6 can be changed, so that the sunlight 5 is uniformly distributed on the farmland 6.
As shown in fig. 4, when the sunlight 5 vertically enters the solar photovoltaic panel assembly 2, a part of the sunlight 5 is absorbed by the first solar photovoltaic panel 21 and the second solar photovoltaic panel 22 and converted into electric energy, and another part of the sunlight 5 enters the indent splitting glass panel 23 and is uniformly distributed on the farm land 6, and the zemax simulated illuminance diagram shows that there is no shadow area on the farm land 6, so that the photosynthesis of crops is guaranteed.
As shown in fig. 5, in winter solstice, the altitude of the sun is the lowest year round for the northern hemisphere area. At the moment, the shadow generated by the illumination of the front dodging photovoltaic agricultural system only completely covers the groove pressing light splitting glass plate 23 on the rear solar photovoltaic panel component 2 and does not cover the first solar photovoltaic panel 21 and the second solar photovoltaic panel 22, so that the first solar photovoltaic panel 21 and the second solar photovoltaic panel 22 can normally receive illumination all the year round to generate electricity; taking the province and the province of Hebei province and the province of Xiongan as an example, most crops are in a dormant or non-farming period in winter, and the annual yield of the crops cannot be greatly influenced even if sunlight 5 is not available on the farmland 6.
As shown in fig. 6, in rainy days, the rainwater 7 slides down along the solar photovoltaic panel assembly 2. Because the gap 3 with the width of 5mm exists between the second solar photovoltaic plate 22 and the pressing groove light splitting glass plate 23 in the solar photovoltaic plate component 2 and between the first solar photovoltaic plate 21, rainwater can fall from the gap 3, and crops under the solar photovoltaic plate component 2 can be irrigated; the existence of this clearance can reduce the wind pressure in this even light type photovoltaic agricultural system simultaneously to reduce the cost expenditure of support 1 in this system.
Example two
As shown in fig. 7, the difference between the second embodiment and the first embodiment is that: the upper side edge of the solar photovoltaic panel 21 is also provided with a groove pressing light splitting glass plate 23, and the lower surface shape of the groove pressing light splitting glass plate is also formed by a groove pressing array. The advantages of this mounting method are: under the condition that the installation height of the solar photovoltaic panel component 2 is low, the uniform irradiation of the sunlight 5 on the farmland 6 can be realized.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (8)

1. The utility model provides a dodging type photovoltaic agricultural system which characterized in that: the solar photovoltaic panel assembly comprises a support (1) and a solar photovoltaic panel assembly (2), wherein the solar photovoltaic panel assembly (2) is composed of a first solar photovoltaic panel (21), a second solar photovoltaic panel (22) and a pressure groove light splitting glass panel (23), and the first solar photovoltaic panel (21), the second solar photovoltaic panel (22) and the pressure groove light splitting glass panel (23) are sequentially arranged on the support in parallel from top to bottom.
2. The dodging photovoltaic agricultural system of claim 1, wherein: the area ratio of the first solar photovoltaic panel (21), the second solar photovoltaic panel (22) and the pressure groove light splitting glass plate (23) is 1: X, wherein X is 0.5-1.5, and preferably X is 1.
3. The dodging photovoltaic agricultural system of claim 1, wherein: gaps (3) with certain width are formed between the second solar photovoltaic panel (22) and the first solar photovoltaic panel (21) and between the pressure groove light splitting glass plates (23), and the widths of the two gaps (3) are equal.
4. The dodging photovoltaic agricultural system of claim 1, wherein: the groove pressing light splitting glass plate (23) is made of high-transmittance glass (4), the upper surface (40) of the groove pressing light splitting glass plate is a plane, and a groove pressing array is arranged on the lower surface of the groove pressing light splitting glass plate.
5. The dodging photovoltaic agricultural system of claim 4, wherein: the cross section of the pressure groove (41) consists of a plane (410) and a sectional free-form surface (411).
6. The dodging photovoltaic agricultural system of claim 5, wherein: the width of a plane (410) of each pressing groove (41) is a, the plane (410) is perpendicular to the upper surface (40) of the pressing groove light splitting glass plate, and the interval between every two adjacent pressing grooves (41) is 0.
7. The dodging photovoltaic agricultural system of claim 4, wherein: the indent array is formed by segmenting and translating a specific free-form surface, and the specific free-form surface is an initial surface type of the lower surface of the indent spectroscopic glass plate which meets the uniform spectroscopic requirement.
8. The dodging photovoltaic agricultural system of claim 7, wherein: the mathematical model of the indent array is:
Figure FDA0002935248680000021
wherein,
Figure FDA0002935248680000022
for this unit vector of the incident ray on the particular free-form surface,
Figure FDA0002935248680000023
for this purpose the unit vector of the outgoing ray on the particular free-form surface,
Figure FDA0002935248680000024
for this purpose, the normal vector, k, at the point of incidence of a ray on a particular free-form surfaceiAs vectors
Figure FDA0002935248680000025
The slope magnitude of (a); miIs the intersection point of the sunlight (5) and a specific free curved surface, MiHas a coordinate of Mi(Mxi，Myi) And Mxi＝i(i＝0、1、2…)，My0＝0；NiIs the intersection point of the sunlight (5) and the farmland (6),Nihas the coordinate of Ni(Nxi，Nyi) And is and
Figure FDA0002935248680000026
Figure FDA0002935248680000027
Mi' is the intersection of the light and sunlight (5) and the indent array, Mi'coordinate is M'i(Mxi，My′i) (ii) a Theta is the inclination angle of the groove pressing light splitting glass plate (23) relative to the farmland (6), h is the height of the groove pressing light splitting glass plate (23) relative to the farmland (6), n0Is the refractive index of air, n1Is the refractive index of the glass (4) medium; "[]"is an integer symbol.
CN202110167002.XA 2021-02-05 2021-02-05 Even light type photovoltaic agricultural system Pending CN112821852A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114303722A (en) * 2021-12-20 2022-04-12 中国科学技术大学 Intelligent photovoltaic glass greenhouse and operation method and application thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114303722A (en) * 2021-12-20 2022-04-12 中国科学技术大学 Intelligent photovoltaic glass greenhouse and operation method and application thereof
CN114303722B (en) * 2021-12-20 2022-08-30 中国科学技术大学 Intelligent photovoltaic glass greenhouse and operation method and application thereof

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