CN117254749A - Photovoltaic module and photovoltaic roofing system - Google Patents
Photovoltaic module and photovoltaic roofing system Download PDFInfo
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- CN117254749A CN117254749A CN202311509214.7A CN202311509214A CN117254749A CN 117254749 A CN117254749 A CN 117254749A CN 202311509214 A CN202311509214 A CN 202311509214A CN 117254749 A CN117254749 A CN 117254749A
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- photovoltaic module
- assembly body
- support assemblies
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- 230000000712 assembly Effects 0.000 claims abstract description 49
- 238000000429 assembly Methods 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 25
- 238000005452 bending Methods 0.000 claims abstract description 18
- 239000011521 glass Substances 0.000 claims description 96
- 239000000463 material Substances 0.000 description 11
- 230000009977 dual effect Effects 0.000 description 6
- 238000009825 accumulation Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Classifications
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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
- H02S20/20—Supporting structures directly fixed to an immovable object
- H02S20/22—Supporting structures directly fixed to an immovable object specially adapted for buildings
- H02S20/23—Supporting structures directly fixed to an immovable object specially adapted for buildings specially adapted for roof structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
- E04D3/35—Roofing slabs or stiff sheets comprising two or more layers, e.g. for insulation
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
- E04D3/36—Connecting; Fastening
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D3/00—Roof covering by making use of flat or curved slabs or stiff sheets
- E04D3/40—Slabs or sheets locally modified for auxiliary purposes, e.g. for resting on walls, for serving as guttering; Elements for particular purposes, e.g. ridge elements, specially designed for use in conjunction with slabs or sheets
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
- F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
- F24S25/61—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules for fixing to the ground or to building structures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
- F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
- F24S25/63—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules for fixing modules or their peripheral frames to supporting elements
- F24S25/632—Side connectors; Base connectors
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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]
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Sustainable Development (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Photovoltaic Devices (AREA)
Abstract
The application discloses photovoltaic module and photovoltaic roofing system relates to photovoltaic technical field to solve support piece on the photovoltaic module and set up unreasonable problem. The photovoltaic module includes: the assembly body is provided with two oppositely arranged first edges and two oppositely arranged second edges; at least two sets of support assembliesThe support assemblies are arranged along a first direction, the first direction is parallel to the first edge, each group of support assemblies comprises one or more support pieces, the plurality of support pieces are arranged along a second direction, and the second direction is parallel to the second edge; the support assemblies at the two ends of at least two groups of support assemblies are respectively arranged at the edge positions of the two second edges along the first direction; in the first direction, the distance between corresponding supports in two adjacent support assemblies is expressed asThe equivalent thickness of the assembly body isThe allowable stress of the assembly body isThe pressure intensity of the surface of the component body isThe bending moment coefficient of the assembly body is，The method meets the following conditions:。
Description
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a photovoltaic module and a photovoltaic roofing system.
Background
Solar energy is a clean renewable energy source, in the development process of the photovoltaic industry at present, solar photovoltaic power generation systems are increasingly applied in China, distributed photovoltaic power stations are increasingly important, and photovoltaic modules are also increasingly important as important components of the photovoltaic power stations.
The photovoltaic module is installed on the roofing, because the photovoltaic module size is great, receives positive and negative load great for the deformation of photovoltaic module is great, and support piece on the photovoltaic module if set up unreasonably makes photovoltaic module receive the destruction under the external load effect easily.
Disclosure of Invention
The invention aims to provide a photovoltaic module and a photovoltaic roofing system, so as to optimize the setting position of a supporting piece on the photovoltaic module and improve the supporting stability and reliability of the photovoltaic module.
In order to achieve the above object, in a first aspect, the present invention provides a photovoltaic module comprising: the assembly body is provided with two oppositely arranged first edges and two oppositely arranged second edges, and the first edges are perpendicular to the second edges; at least two sets of support assemblies arranged in a first direction, the first direction being parallel to the first edge, each set of support assemblies including one or more support members arranged in a second direction, the second direction being parallel to the second edge; the support assemblies at two ends of the at least two groups of support assemblies are respectively arranged at the edge positions of the two second edges along the first direction; in the first direction, the distance between corresponding supports in two adjacent support assemblies is expressed asThe equivalent thickness of the assembly body isThe allowable stress of the assembly body isThe pressure intensity of the surface of the component body isThe bending moment coefficient of the assembly body is，The method meets the following conditions:。
adopts the above techniqueUnder the condition of the technical scheme, the photovoltaic module is provided with a module body and a support module which are connected together, the module body is of a rectangular plate-shaped structure and is provided with a pair of first sides and a pair of second sides, the first sides and the second sides are vertical, at least two groups of support modules are arranged along the direction parallel to the first sides, the support modules at the two ends of the at least two groups of support modules are respectively arranged at the edge positions of the two second sides of the module body along the first direction, namely, no cantilever structure extends between the support modules and the adjacent second sides, the support mode of the photovoltaic module in the first direction can be processed according to a simple support beam, a section between two adjacent support members arranged along the first direction forms a simple support part, and the distance of the simple support part is expressed asThe method comprises the steps of carrying out a first treatment on the surface of the The allowable stress and the bending moment coefficient of the assembly body are determined according to the materials and the sizes of the cover plate and the back plate selected by the assembly body, the equivalent thickness is determined according to the materials and the thickness of the cover plate and the back plate of the assembly body, under the conditions that the structure, the materials and the sizes of the assembly body and the external load are determined, the distance of the simple support part is designed to meet the above formula, and the arrangement position of the support part on the assembly body can be used for actually bearing the external load such as wind pressure, wind suction, snow accumulation, hail, trampling and the like in the first direction, the deformation distribution of the parts of the assembly body, which are positioned at the two sides of the support part, along the gravity direction is uniform, the generated stress is generally the same, and the stress is smaller, so that the position of the support part is set more reasonably, and the support stability and the reliability of the photovoltaic assembly are improved. Through optimizing the position and the design of the support piece, the hidden crack resistance of the photovoltaic module is effectively improved, the influence of various environmental factors can be resisted, and the stable operation of the photovoltaic module is ensured.
In some of the possible implementations of the present invention,。
in this way, by adding a safety factor to the formula, the better setting position of the supporting piece in practical engineering application is more satisfied, so as to ensure the obtainedThe value of the formula (I) can meet the requirement of the support stability of the photovoltaic module, and the hidden crack resistance of the photovoltaic module is further improved.
In some possible implementations, each set of support assemblies includes at least two supports arranged in a second direction; in the same support assembly, the distance between two adjacent supports is expressed as，The method meets the following conditions:。
under the condition of adopting the technical proposal, at least two supporting pieces are also arranged in the same second direction, a simple supporting part is also formed between two adjacent supporting pieces, and the distance between the simple supporting parts formed by the arrangement positions of the supporting pieces on the component body is the same as that in the first direction and is positioned in the same second directionThe method meets the following conditions:the position of arranging of this support piece on the subassembly body can be when the photovoltaic module actually bears external load such as wind pressure, wind inhale, snow accumulation, hail, trample, and on the second direction, the deformation distribution along the direction of gravity that the part that lies in the support piece both sides of subassembly body produced is even, and the stress that produces is the same generally, and the stress is all less, and support piece's position setting is more reasonable, has improved photovoltaic module's supporting stability and reliability.
In some of the possible implementations of the present invention,. Therefore, by adding a safety coefficient in the formula, the practical engineering application is more satisfiedBetter setting position of the support in use to ensure the obtainedThe value of the formula (I) can meet the requirement of the support stability of the photovoltaic module, and the hidden crack resistance of the photovoltaic module is further improved.
In some possible implementations, each set of support assemblies includes at least two supports arranged in a second direction; in the same support assembly, the distance between two adjacent supports is expressed asWhen (when)In the time-course of which the first and second contact surfaces,the method meets the following conditions:. In this way, when the distance between the two supporting members in the second direction is much larger than the distance between the two supporting members in the first direction, the supporting of the photovoltaic module can be processed according to the unidirectional beam, and the distance between the supporting members in the second direction calculated according to the formula can more satisfy the better setting position of the supporting members in the practical engineering application, so as to ensure the obtainedThe value of (2) can meet the requirement of the support stability of the photovoltaic module.
In some possible implementations, the assembly body is a single glass assembly, the equivalent thickness of the assembly bodyIs the thickness of single glass; or the assembly body is a double-glass assembly, and the thickness of the upper glass isThe thickness of the lower glass isEquivalent thickness of the assembly bodyThe method meets the following conditions:。
under the condition of adopting the technical scheme, as the photovoltaic module can bear the load and is mainly made of glass materials positioned on one side or two sides, the equivalent thickness of the module body can only consider the thickness of the glass, if only one side is provided with the glass, the equivalent thickness of the module body is the thickness of the layer of glass, and if two sides are provided with the glass, the equivalent thickness and the thicknesses of the upper layer of glass and the lower layer of glass meet the above formula.
In some possible implementations, the maximum distance between each adjacent two supports in the same direction is expressed asSatisfies the following conditions。
In some possible implementations, the first edge has a length ofThe second side has a side length ofThe method comprises the steps of carrying out a first treatment on the surface of the The support assemblies at two ends of at least two groups of support assemblies are respectively arranged at the edge positions of two second edges of the assembly body along the first direction;is thatIs the maximum value of (2); the number of the supporting components arranged along the same first direction is expressed as m, and the width of each supporting component in the first direction is x, and m is more than or equal to Symbol'"means rounded up.
Under the condition of adopting the technical scheme, according to the side length of the first side, the first adjacent side interval, the maximum distance between two adjacent supporting pieces in the first direction and the width of the supporting pieces in the first direction, the minimum number of the supporting pieces distributed in the same first direction can be calculated, and the supporting requirement can be met.
In some possible implementations, the first edge has a length ofThe second side has a side length ofThe method comprises the steps of carrying out a first treatment on the surface of the The supporting pieces at two ends of each group of supporting components are respectively arranged at the edge positions of two first sides of the component body along the second direction;is thatIs the maximum value of (2); the width of each support piece in the second direction is s, the number of the support pieces arranged along the same second direction is denoted as k, and the width of each support piece in the second direction is s, k is more than or equal to Symbol'"means rounded up.
Under the condition of adopting the technical scheme, according to the side length of the second side, the second adjacent side interval, the maximum distance between two adjacent supporting pieces in the second direction and the width of the supporting pieces in the second direction, the minimum number of the supporting pieces distributed in the same second direction can be calculated, and the supporting requirement can be met.
In some possible implementations, each set of support assemblies includes at least two support members arranged along the second direction, and the support members at both ends of each set of support assemblies are respectively disposed at edge positions of the two first sides of the assembly body. Therefore, an overhanging cantilever structure is not arranged between the support component and the adjacent first edge, and the support mode of the photovoltaic component in the second direction can be processed according to the simply supported beam.
In some possible implementations, the at least two sets of support assemblies are specifically at least three sets of support assemblies, and in the first direction, the at least three sets of support assemblies are disposed at equal intervals. By the arrangement, bending moment among the supporting pieces on the assembly body is the same, and the supporting is more stable.
In some possible implementations, each set of support assemblies includes at least three supports that are equally spaced in the second direction. By the arrangement, the bending moment of each supporting piece on the assembly body is the same, and the support is more stable.
In a second aspect, the invention also provides a photovoltaic roofing system, which comprises a roofing system and a photovoltaic module as described above, wherein the module body is connected with the roofing system through a support module.
In the photovoltaic roofing system, the roofing system is provided with a bearing surface, the photovoltaic module is connected with the bearing surface through the supporting module of the photovoltaic module, and the photovoltaic module can be stably and reliably supported and connected on the roofing system through the arrangement structure and the position of the supporting module of the photovoltaic module.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a schematic back view of a photovoltaic module according to an embodiment of the present invention;
FIG. 2 is a schematic view of the direction A in FIG. 1;
fig. 3 is a schematic back view of a second photovoltaic module according to an embodiment of the present invention;
FIG. 4 is a schematic view in the direction A of FIG. 3;
fig. 5 is a schematic back view of a third photovoltaic module according to an embodiment of the present invention;
FIG. 6 is a schematic view in the direction A in FIG. 5;
fig. 7 is a schematic back view of a fourth photovoltaic module according to an embodiment of the present invention;
fig. 8 is a schematic view in the direction a in fig. 7.
Reference numerals:
1 is a component body, 11 is a first side, 12 is a second side, 2 is a supporting component, and 21 is a supporting piece.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. The meaning of "a number" is one or more than one unless specifically defined otherwise.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The back of the photovoltaic module is directly provided with a supporting piece such as a back rail, so that the photovoltaic module is conveniently prefabricated and the photovoltaic module is directly installed with a roof, but due to the fact that the photovoltaic module is large in size, the received positive load and negative load are large, the deformation of the photovoltaic module is large, and if the supporting piece on the photovoltaic module is unreasonable in setting position, the photovoltaic module is easily damaged under the action of external load.
In view of this, referring to fig. 1-7, embodiments of the present invention provide a photovoltaic module comprising a module body 1 and at least two sets of support modules 2; wherein the support assembly 2 is connected to the lower surface of the assembly body 1, i.e. the back surface of the assembly body 1. The module body 1 may include a cover plate, a packaging layer, a battery pack and a back plate which are stacked, wherein the module body 1 has two opposite first sides 11 and two opposite second sides 12, and the first sides 11 and the second sides 12 are perpendicularThe side length of the first side 11 is smaller than, greater than or equal to the side length of the second side 12, and is not limited herein, and for example, the side length of the first side 11 may be 900mm to 1500mm, and the side length of the second side 12 may be 1500mm to 3000mm. At least two sets of support assemblies 2 are arranged along a first direction, the first direction being parallel to the first edge 11, each set of support assemblies 2 comprising one or more support members 21, the plurality of support members 21 being arranged along a second direction, the second direction being parallel to the second edge 12; the support assemblies 2 at the two ends of at least two groups of support assemblies 2 are respectively arranged at the edge positions of the two second edges 12 along the first direction; in the first direction, the distance between the corresponding supports 21 in two adjacent support assemblies 2 is denoted asThe equivalent thickness of the assembly body 1 isThe allowable stress of the assembly body 1 isThe pressure intensity of the surface of the assembly body 1 isThe bending moment coefficient of the assembly body 1 isWhen the damage stress generated by the photovoltaic module under the load is smaller than the allowable stress of the photovoltaic module, the support position of the support piece 21 obtained at the moment can meet the requirements of support stability and reliability, and the formula is adoptedObtaining the distance of the simple support part in the first directionThe method meets the following conditions:。
it should be noted that, the equivalent thickness of the component body 1 is related to the materials and the dimensions of the cover plate and the back plate selected by the component body 1, if the cover plate is made of a glass cover plate and the back plate is made of a non-glass material, the part of the component body 1 capable of bearing the load is mainly made of a glass cover plate, the equivalent thickness of the component body 1 is the thickness of the glass cover plate, if the cover plate is made of a glass cover plate and the back plate is made of a glass back plate, the part of the component body 1 capable of bearing the load is mainly made of a glass cover plate and a glass back plate, and the equivalent thickness of the component body 1 is related to the thicknesses of the glass cover plate and the glass back plate. The allowable stress of the assembly body 1 is obtained by searching industry specification data, and in general, the industry specification data prescribes strength values of different positions of glass within a certain thickness range, namely, the allowable stress. The bending moment coefficient of the component body 1 is also related to the materials and the sizes of the cover plate and the back plate of the component body 1, and can be obtained by searching according to industry silicon wafer data.
For example, the specific structure of the supporting member 21 is not limited in this application, as long as a certain supporting connection area can be provided to the back surface of the assembly body 1, the supporting member 21 and the back surface of the assembly body 1 can be fixed by adhesion, or the supporting member 21 located at the edge of the back surface of the assembly body 1 and the assembly body 1 are mechanically connected by clamping or supporting, and the specific structure is not limited herein. When each set of the supporting members 2 includes one supporting member 21, as shown in fig. 1 to 4, the supporting connection surface of each supporting member 21 and the assembly body 1 is a strip-shaped connection surface extending along the second direction, so as to improve the stability of the supporting of the assembly body 1 by the supporting member 21. When only one support member 21 is included in each set of support members 2, as shown in fig. 1 and 2, there may be a space between both ends of each support member 21 and the two second sides 12, or, as shown in fig. 3 and 4, both ends of each support member 21 extend to the edges of the two second sides 12, so long as a simple support portion is formed between the support members 21 in the first direction. When each set of the support members 2 includes a plurality of support members 21, there may be two, three, four or more, as shown in fig. 5 and 6, two support members 21 at both ends of each set of the support members 2 may be spaced apart from two second sides 12, respectively, or as shown in fig. 7 and 8, two support members 21 at both ends of each set of the support members 2 may be disposed at edges of two second sides 12, respectively, which is not limited in this embodiment.
Under the condition of adopting the technical scheme, the photovoltaic module is provided with the module body 1 and the support modules 2 which are connected together in advance, the module body 1 is of a rectangular plate-shaped structure and is provided with a pair of first edges 11 and a pair of second edges 12, the first edges 11 and the second edges 12 are vertical, at least two groups of support modules 2 are arranged along the direction parallel to the first edges 11, the support modules 2 at two ends of at least two groups of support modules 2 are respectively arranged at the edge positions of the two second edges 12 of the module body 1 along the first direction, namely, no cantilever structure exists between the support modules 2 and the adjacent second edges 12, the support mode of the photovoltaic module in the first direction can be processed according to a simple beam, a section between two adjacent support pieces 21 which are arranged on the module body 1 along the direction parallel to the first edges 11 forms a simple support part, and the distance of the simple support part is expressed as. The allowable stress and the bending moment coefficient of the assembly body 1 are determined according to the materials and the sizes of the cover plate and the back plate selected by the assembly body 1, the equivalent thickness is determined according to the materials and the thickness of the cover plate and the back plate of the assembly body 1, under the condition that the structure, the materials and the sizes of the assembly body 1 and the external load are determined, the distance of the simple supporting part is designed to meet the above formula, and the arrangement position of the supporting part 21 on the assembly body 1 can be used for effectively bearing the external loads such as wind pressure, wind suction, snow accumulation, hail, trampling and the like by the photovoltaic assembly, the deformation distribution of the parts of the assembly body 1, which are positioned at the two sides of the supporting part 21, along the gravity direction is uniform, the generated stress is generally the same, the stress is smaller, the position setting of the supporting part 21 is more reasonable, and the supporting stability and the reliability of the photovoltaic assembly are improved. By optimizing the position and design of the supporting piece 21, the hidden crack resistance of the photovoltaic module is effectively improved, the influence of various environmental factors can be resisted, and the stable operation of the photovoltaic module is ensured.
Further, in order to make the supporting position of the supporting member 21 more secure,the method meets the following conditions:. Thus, by adding a safety factor to the formula, the better setting position of the support member 21 in practical engineering application is more satisfied to ensure the obtainedThe value of (2) can meet the requirement of the support stability of the photovoltaic module.
As shown in fig. 5 to 8, each group of support assemblies 2 comprises at least two supports 21 arranged along the second direction; in the same support assembly 2, the distance between two adjacent supports 21 is denoted asAccording to the formulaDeriving the distance of the profile in the second directionThe method meets the following conditions:。
with the above technical solution, at least two supporting members 21 are also provided in the same second direction, and a simple support portion is formed between two adjacent supporting members 21, and the distance between the simple support portions formed by the arrangement positions of the supporting members 21 on the module body 1 in the same second direction is the same as that in the first directionThe method meets the following conditions:the support member 21 is disposed on the module body 1 at a position capable of being positioned on both sides of the support member 21 in the second direction when the photovoltaic module is actually subjected to external loads such as wind pressure, wind suction, snow accumulation, hail, stepping, etc., in the module body 1The deformation distribution along the gravity direction that divides the production is even, and the stress that produces is the same generally, and the stress is all less, and the position setting of support piece 21 is more reasonable, has improved photovoltaic module's support stability and reliability, has further improved photovoltaic module's anti hidden crack ability.
Further, in order to make the supporting position of the supporting member 21 more secure,the method meets the following conditions:. Thus, by adding a safety factor to the formula, the better setting position of the support member 21 in practical engineering application is more satisfied to ensure the obtainedThe value of the formula (I) can meet the requirement of the support stability of the photovoltaic module, and the hidden crack resistance of the photovoltaic module is further improved.
As shown in fig. 5-8, in some embodiments, for each set of support assemblies 2 comprising at least two supports 21 arranged along the second direction; when (when)At the time, the simple support part in the second directionCan be according to the formulaA determination is made.
While whenWhen the simple support part in the second direction is used for processing the stress calculation formula according to the unidirectional beamPerforming calculation processing, and obtaining after formula deformationThe method meets the following conditions:. In this way, when the distance between the two supporting members 21 in the second direction is much larger than the distance between the two supporting members 21 in the first direction, the supporting of the photovoltaic module can be processed according to the unidirectional beam, and the distance between the supporting members 21 in the second direction calculated according to the formula can be more satisfied with the better setting position of the supporting members 21 in the practical engineering application, so as to ensure the obtainedThe value of (2) can meet the requirement of the support stability of the photovoltaic module.
Similarly, whenAt the time, the simple support part in the first directionCan be according to the formulaMake a determination whenWhen the simple support part in the first direction is used for processing the stress calculation formula according to the unidirectional beamPerforming calculation processing, and obtaining after formula deformationThe method meets the following conditions:. In this embodiment, the equivalent thickness of the assembly body 1 is optimized, and when the assembly body 1 is a single glass assembly, that is, the cover plate of the assembly body 1 is a glass cover plate, the equivalent thickness of the assembly body 1Is the thickness of single glass, is the glass coverThickness of the plate. When the assembly body 1 is a double-glass assembly, that is, the cover plate of the assembly body 1 is a glass cover plate, and the back plate is a glass back plate, the glass cover plate is an upper glass, the glass back plate is a lower glass, and the thickness of the upper glass isThe thickness of the lower glass isEquivalent thickness of the assembly body 1The method meets the following conditions:. Since the photovoltaic module is mainly made of glass materials on one or two sides capable of bearing load, the equivalent thickness of the module body 1 can only consider the thickness of glass, if only one side is provided with glass, the equivalent thickness of the module body 1 is the thickness of the layer of glass, and if two sides are provided with glass, the equivalent thickness and the thicknesses of the upper layer of glass and the lower layer of glass meet the above formula.
Illustratively, for the current timeWhen the support 21 on the photovoltaic module is in the first directionWhile meeting in the second directionWhen the pressure Pmax of the surface of the component body 1 is 5400Pa, the allowable stress of the glassAt 40MPa, the bending moment coefficient of the assembly body 1Can be selected from table 1, wherein table 1 shows one of the embodiments of the present inventionAnd bending moment coefficient of the assembly body 1For example, to obtain the correspondence table ofAs can be seen from the above formula, the lower limit of the maximum value of (2) is selected from table 1Maximum at 1Value, 0.1536. Calculation ofSeveral examples of (a) are as follows:
table 1 showsBending moment coefficient with the assembly bodyCorresponding relation table of (a)
Example 1: the thickness of the upper glass of the double-glass assembly is 2mm, the thickness of the lower glass is 1.6mm, and then the equivalent thickness of the assembly body 1 is calculated to be 2.3mm, and the thickness is obtained≤206.2mm。
Example 2: the thickness of the upper glass of the double-glass assembly is 2mm, the thickness of the lower glass is 2mm, and then the equivalent thickness of the assembly body 1 is calculated to be 2.5mm, and the thickness is obtained≤224.1mm。
Example 3: the thickness of the upper glass of the double-glass assembly is 2mm, and the thickness of the lower glass is3.2mm, the equivalent thickness of the module body 1 is calculated to be 3.4mm, and the result is obtained≤304.8mm。
Example 4: the thickness of the upper glass of the double-glass assembly is 3.2mm, the thickness of the lower glass is 3.2mm, and then the equivalent thickness of the assembly body 1 is calculated to be 4.0mm, and the thickness is obtained≤358.6mm。
Example 5: the thickness of the single glass component is 3.2mm, the equivalent thickness of the component body 1 is 3.2mm, and the thickness is obtained≤286.9mm。
In another embodiment, whenIn the time-course of which the first and second contact surfaces,the method meets the following conditions:. When the pressure Pmax of the surface of the component body 1 is 5400Pa, the allowable stress of the glassAt 40MPa, calculateSeveral examples of (a) are as follows:
example one: the thickness of the upper glass of the double-glass assembly is 2mm, the thickness of the lower glass is 1.6mm, and then the equivalent thickness of the assembly body 1 is calculated to be 2.3mm, and the thickness is obtained≤280.0mm。
Example two: the thickness of the upper glass of the double-glass assembly is 2mm, the thickness of the lower glass is 2mm, and then the equivalent thickness of the assembly body 1 is calculated to be 2.5mm, and the thickness is obtained≤304.3mm。
Example three: the thickness of the upper glass of the double-glass assembly is 2mm, the thickness of the lower glass is 3.2mm, and then the equivalent thickness of the assembly body 1 is calculated to be 3.4mm, and the thickness is obtained≤413.8mm。
Example four: the thickness of the upper glass of the double-glass assembly is 3.2mm, the thickness of the lower glass is 3.2mm, and then the equivalent thickness of the assembly body 1 is calculated to be 4.0mm, and the thickness is obtained≤486.9mm。
Example five: the thickness of the single glass component is 3.2mm, the equivalent thickness of the component body 1 is 3.2mm, and the thickness is obtained≤389.5mm。
Comprehensive of the aboveAndin both cases, getMaximum value of (2)The lower limit of (2) is 206.2mm, the maximum valueThe upper limit of (2) is 486.9mm, i.e. 206.2 mm.ltoreq.≤486.9mm。
Similarly, whenIn the time-course of which the first and second contact surfaces,，corresponding relation with bending moment coefficient of the assembly body 1, andthe corresponding relation with the bending moment coefficient is the same and can be selected fromAnd selecting a corresponding bending coefficient from the corresponding relation of the bending moment coefficient of the assembly body 1. When (when)In the time-course of which the first and second contact surfaces,thenMaximum value of (2)The lower limit of (2) is 206.2mm, the maximum valueThe upper limit of (2) is 486.9mm, i.e. 206.2 mm.ltoreq.≤486.9mm。
I.e. in either the first or the second direction, the maximum distance between each adjacent two of the support members 21 is expressed asSatisfies the following conditions。
As shown in fig. 1, 3, 5 and 7, the present embodiment optimizes the number of the supporting members 21 arranged along the first direction on the photovoltaic module, wherein the length of the first side 11 is as followsThe second side 12 has a side length ofThe method comprises the steps of carrying out a first treatment on the surface of the The support assemblies 2 at the two ends of at least two groups of support assemblies 2 are respectively arranged at the edge positions of the two second edges 12 of the assembly body 1 along the first direction;is thatIs the maximum value of (2); the number of support members 2 arranged in the same first direction is denoted as m, and the width of each support member 21 in the first direction is x, typically 5 mm.ltoreq.x.ltoreq.30 mm, and m.gtoreq. Symbol'"represents an upward rounding, and by deforming this formula, m.gtoreq. 。
For example, when 1 < >When the number of the components is less than 2,rounding up to 2, indicating that at least two supports 21 are required, the number of supports 21 arranged in the first direction, m.gtoreq2, the requirements of supporting stability and reliability can be met; when 2 < ">When the number of the components is less than 3,the upper rounding is 3, which means that at least three supporting pieces 21 are needed, and the number m of the supporting pieces 21 distributed in the first direction is more than or equal to 3, so that the requirements of supporting stability and reliability can be met; when (when)When the number of the samples is =3,the upward rounding is 3, which means that at least three supporting pieces 21 are needed, and the number m of the supporting pieces 21 distributed in the first direction is more than or equal to 3, so that the requirements of supporting stability and reliability can be met.
Specifically, when the assembly body 1 is a dual glass assembly, the thickness of the upper glass of the dual glass assembly is 2mm, the thickness of the lower glass is 1.6mm, the length of the first side 11 of the assembly body 1 is 1134mm, the length of the second side 12 is 1722mm, the width x of each support piece 21 in the first direction is 20mm, the pressure P applied to the surface of the assembly body 1 is 5400Pa at maximum, and the allowable stress of the glassWhen 40MPa is applied to the photovoltaic module in which the support members 2 at both ends are disposed at the edge of the second side 12 in the first direction, as shown in fig. 1, 3, 5 and 7, at this time:
obtaining the equivalent thickness of the assembly body 12.3mm according to the formulaObtaining≤280.0mm，=280.0mm, according to formula m. Gtoreq The number m of the supporting pieces 21 arranged in the same first direction is equal to or greater than 5.
In this way, according to the side length of the first side 11, the maximum distance between two adjacent supporting members 21 in the first direction, and the width of the supporting members 21 in the first direction, the minimum number of supporting members 21 arranged in the same first direction can be calculated, and the supporting requirement can be satisfied.
As shown in fig. 7, the number of the supporting members 21 arranged in the second direction on the photovoltaic module is optimized in this embodiment, and the length of the first side 11 isThe second side 12 has a side length ofThe method comprises the steps of carrying out a first treatment on the surface of the The supporting pieces 21 at the two ends of each group of supporting components 2 are respectively arranged at the edge positions of the two first edges 11 of the component body 1 along the second direction;is thatIs the maximum value of (2); the width of each support 21 in the second direction is s, the number of supports 21 arranged in the same second direction is denoted as k, the width of each support 21 in the second direction is s, and typically 5 mm.ltoreq.s.ltoreq.30 mm, then k.gtoreq Symbol'"means rounding up, and by deforming this formula, k.gtoreq 。
For example, when 1 < >When the number of the components is less than 2,the upward rounding is 2, which means that at least two supporting pieces 21 are needed, and the number k of the supporting pieces 21 distributed in the second direction is more than or equal to 2, so that the requirements of supporting stability and reliability can be met; when 2 < ">When the number of the components is less than 3,the number k of the supporting pieces 21 distributed in the second direction is more than or equal to 3 when the supporting pieces are rounded up to 3, so that the requirements of supporting stability and reliability can be met; when (when)When the number of the samples is =3,and the number k of the supporting pieces 21 distributed in the second direction is more than or equal to 3, and the requirements of supporting stability and reliability can be met.
For example, when the module body 1 is a double-glass module, the upper glass thickness of the double-glass module is 2mm, the lower glass thickness is 1.6mm, the length of the first side 11 of the module body 1 is 1134mm, and the length of the second side 12 is 1722mm, the width s of each support 21 in the second direction being 30mm, the surface of the module body 1 being subjected to a pressure Pmax of 5400Pa, the allowable stress of the glassWhen 40MPa is applied to the photovoltaic module in which the supporting members 21 at both ends are provided at the edge of the first side 11 in the second direction, as shown in fig. 7, at this time:
obtaining the equivalent thickness of the assembly body 12.3mm according to the formulaObtaining≤280.0mm，=280.0mm, according to formula k. Gtoreq The number k of the supporting pieces 21 arranged along the same second direction is equal to or greater than 7.
For another example, when the assembly body 1 is a dual glass assembly, the upper glass thickness of the dual glass assembly is 2mm, the lower glass thickness is 2mm, the length of the first side 11 of the assembly body 1 is 1134mm, the length of the second side 12 is 1722mm, the width s of each support 21 in the second direction is 30mm, the pressure P applied to the surface of the assembly body 1 is 5400Pa at maximum, and the allowable stress of the glassWhen 40MPa is applied to the photovoltaic module in which the supporting members 21 at both ends are provided at the edge of the first side 11 in the second direction, as shown in fig. 7, at this time:
obtaining the equivalent thickness of the assembly body 12.5mm according to the formulaObtaining≤304.3mm，=304.3 mm, according to formula k Σ The number k of the supporting pieces 21 arranged along the same second direction is equal to or greater than 7.
For another example, when the assembly body 1 is a dual glass assembly, the upper glass thickness of the dual glass assembly is 3.2mm, the lower glass thickness is 3.2mm, the length of the first side 11 of the assembly body 1 is 1134mm, the length of the second side 12 is 1722mm, the width s of each support 21 in the second direction is 30mm, the pressure Pmax of the surface of the assembly body 1 is 5400Pa, and the allowable stress of the glassWhen 40MPa is applied to the photovoltaic module in which the supporting members 21 at both ends are provided at the edge of the first side 11 in the second direction, as shown in fig. 7, at this time:
obtaining the equivalent thickness of the assembly body 14.0mm according to the formulaObtaining≤486.9mm，=486.9 mm, according to the formula k+.gtoreq The number k of the supporting pieces 21 arranged along the same second direction is equal to or greater than 5.
Under the condition of adopting the technical scheme, according to the side length of the second side 12, the maximum distance between two adjacent supporting pieces 21 in the second direction and the width of the supporting pieces 21 in the second direction, the minimum number of the supporting pieces 21 distributed in the same second direction can be calculated, and the supporting requirement can be met.
As shown in fig. 7, in some possible implementations, each set of support assemblies 2 includes at least two support members 21 arranged along the second direction, and the support members 21 at both ends of each set of support assemblies 2 are respectively disposed at edge positions of the two first sides 11 of the assembly body 1. In this way, the support assembly 2 has no cantilever structure extending from the adjacent first edge 11, and the photovoltaic module can be supported in the second direction in a manner that is in accordance with a simply supported beam.
As shown in fig. 1, 3, 5 and 7, in some embodiments, the number of the support assemblies 2 is at least three, for example, three, four, five, etc. groups, and the support assemblies 2 are disposed at equal intervals in the first direction. By this arrangement, the bending moment between the supporting pieces 21 on the assembly body 1 can be the same, and the supporting is more stable.
Similarly, as shown in fig. 5 to 8, each group of support assemblies 2 comprises at least three supports 21, which may be for example three, four, five, etc. more, these supports 21 being equally spaced in the second direction. By this arrangement, the bending moment of each support piece 21 on the assembly body 1 can be the same, and the support is more stable.
Based on the photovoltaic module described in any one of the above embodiments, the embodiment of the present invention further provides a photovoltaic roofing system, which includes a roofing system and a photovoltaic module, where the photovoltaic module is the photovoltaic module described in any one of the above embodiments, and the module body 1 of the photovoltaic module is connected with the roofing system through the support module 2.
In this photovoltaic roofing system, roofing system has the loading surface, is connected with the loading surface with photovoltaic module through the support component 2 that self had, specifically, photovoltaic module is connected with the loading surface through the support piece 21 of taking on it, can realize through the setting up structure and the position of photovoltaic module self support component 2 that photovoltaic module is stable reliably to support and connect on roofing system, has the beneficial effect the same as photovoltaic module among the above each embodiment, and is not repeated here.
Claims (13)
1. A photovoltaic module, comprising:
the assembly comprises an assembly body and at least two groups of support assemblies connected to the lower surface of the assembly body, wherein the assembly body is provided with two oppositely arranged first edges and two oppositely arranged second edges, and the first edges are perpendicular to the second edges; the at least two sets of support assemblies are arranged along a first direction, the first direction is parallel to the first edge, each set of support assemblies comprises one or more support members, the plurality of support members are arranged along a second direction, and the second direction is parallel to the second edge;
the support assemblies at two ends of the at least two groups of support assemblies are respectively arranged at the edge positions of the two second edges along the first direction;
in the first direction, the distance between the corresponding support members in two adjacent support assemblies is expressed asThe equivalent thickness of the assembly body is +.>The allowable stress of the assembly body is +.>The pressure intensity of the surface of the component body is +.>The bending moment coefficient of the assembly body is +.>，/>The method meets the following conditions: />。
2. The photovoltaic module of claim 1, wherein the photovoltaic module comprises,。
3. the photovoltaic module of claim 1, wherein each set of the support assemblies comprises at least two supports arranged along the second direction;
in the same support assembly, the distance between two adjacent supports is expressed as，/>The method meets the following conditions:。
4. the photovoltaic module according to claim 3,。
5. the photovoltaic module of claim 1, wherein each set of the support assemblies comprises at least two supports arranged along the second direction;
in the same support assembly, the distance between two adjacent supports is expressed asWhen->When (I)>The method meets the following conditions: />。
6. The photovoltaic module according to any one of claims 1 to 5, wherein each group of support modules comprises at least two of the support members arranged in the second direction, and the support members at both ends of each group of support modules are respectively disposed at edge positions of the two first sides.
7. The photovoltaic module of any of claims 1-5, wherein the module body is a single-glass module, and the module body has an equivalent thicknessIs the thickness of single glass; or (b)
The assembly body is a double-glass assembly, and the thickness of upper glass isThe thickness of the lower glass is->Equivalent thickness of the assembly body/>The method meets the following conditions: />。
8. The photovoltaic module according to any one of claims 1 to 5, characterized in that the maximum distance between each adjacent two of the supports in the same direction is expressed asSatisfy->。
9. The photovoltaic module of any of claims 1-5, wherein the first edge has a length ofThe side length of the second side is +.>；
The support assemblies at two ends of the at least two groups of support assemblies are respectively arranged at the edge positions of two second edges of the assembly body along the first direction;is->Is the maximum value of (2); the number of the support members arranged along the same first direction is denoted as m, and the width of each support member in the first direction is x, m ∈> Sign "/->"means rounded up.
10. The photovoltaic module of any of claims 3-5, wherein the first edge has a length ofThe side length of the second side is +.>；
The support pieces at two ends of each group of support assemblies are respectively arranged at the edge positions of two first sides of the assembly body along the second direction;is->Is the maximum value of (2); the number of the supporting pieces arranged along the same second direction is denoted as k, and the width of each supporting piece in the second direction is s, and k is equal to or more than +.> Sign "/->"means rounded up.
11. The photovoltaic module according to any one of claims 1-5, wherein the at least two sets of support assemblies are specifically at least three sets of support assemblies, and wherein the at least three sets of support assemblies are disposed at equal intervals in the first direction.
12. The photovoltaic module of any of claims 1-5, wherein each set of the support assemblies comprises at least three of the support members, the at least three support members being equally spaced in the second direction.
13. A photovoltaic roofing system comprising a roofing system, further comprising a photovoltaic module according to any one of claims 1-12, the module body being connected to the roofing system by the support module.
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