CN108824244A - A kind of high-efficiency photovoltaic sound barrier - Google Patents
A kind of high-efficiency photovoltaic sound barrier Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F8/00—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic
- E01F8/0005—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement
- E01F8/0047—Arrangements for absorbing or reflecting air-transmitted noise from road or railway traffic used in a wall type arrangement with open cavities, e.g. for covering sunken roads
- E01F8/0064—Perforated plate or mesh, e.g. as wall facing
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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
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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
- H02S20/21—Supporting structures directly fixed to an immovable object specially adapted for motorways, e.g. integrated with sound barriers
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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
- H02S30/00—Structural details of PV modules other than those related to light conversion
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- 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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Abstract
The invention discloses a kind of high-efficiency photovoltaic sound barriers, connection steelframe including column and between column, it is additionally provided with several photovoltaic sound separating members between the column, is connect through the column with roadbed after being achieved a fixed connection between each photovoltaic sound separating member by the connection steelframe；Wherein, the photovoltaic sound separating member includes photovoltaic module, transparent microperforated panel and the sealing cavity between the photovoltaic module and transparent microperforated panel, and the photovoltaic module includes N-type double-side cell and solar double-glass assemblies.High-efficiency photovoltaic sound barrier of the invention, it is combined using transparent microperforated panel and photovoltaic module and forms the photovoltaic noise barrier screen body with sound absorption performance, ensure that photovoltaic noise barrier has good sound absorption effect in middle low-frequency range, and photovoltaic module uses monocrystalline double-side cell as photovoltaic module, so that the positive back side of photovoltaic noise barrier all has generating function, promoted to improve low-frequency range interior suction sound insulation property in the generating efficiency and realization of photovoltaic noise barrier.
Description
Technical Field
The invention belongs to the technical field of sound barrier and photovoltaic power generation integration application, and particularly relates to a high-efficiency photovoltaic sound barrier.
Background
In recent years, urban highway and rail transit systems are rapidly developed, so that the problems of vibration, noise pollution and the like are inevitably brought while convenience is brought to social life, the human health is harmed, the life quality of people is reduced, and the land value along the road is reduced to a certain extent. Data show that the land price is reduced by 0.08-1.26% when the traffic noise is increased by 1 dB. In order to solve the problem, the simplest and most effective measure is to arrange a sound barrier along the road and rail traffic, which is positioned between the sound source and the sound receiving point, so that the running noise of the sound source has a remarkable additional attenuation in the transmission process, thereby weakening the noise influence in a certain area where a receiver is positioned, and improving the sound environment quality of the surrounding environment. The sound barrier in China is applied later, but the whole industry and market develop rapidly, and since hundreds of meters of experimental sound barriers are installed on the section of Guiyang-Huangguoshu highway Guizhou institute of technology of Huangguoshu for the first time in Guiyang in Guizhou province in 1992, thousands of urban highway and rail transit sound barriers which are built and put into use in China are already achieved.
With the innovation of technology and the progress of industry, the current development trend of sound barrier mainly includes two major directions: (1) functional attributes other than acoustic isolation are added. The project cost of the sound barrier is huge, the project cost of each linear meter is more than 2000 yuan, and besides the realization of the conventional noise control, if other functional attributes can be attached, the application value and the popularization benefit of the sound barrier are necessarily improved. (2) The insertion loss of the sound barrier is increased, and meanwhile, the sound absorption and insulation effect of low-frequency noise is enhanced, so that the low-frequency noise in urban highways and rail transit is controlled. The technical specification and standard of the sound barrier in China are not refined enough, so that the low-frequency acoustic performance of the sound barrier sound absorption and insulation module is poor, taking TB/T2122-2010, railway sound barrier acoustic member technical requirement and test method as an example, the sound barrier sound absorption and insulation module requires that the sound insulation Rw of the railway sound barrier sound absorption and insulation module is greater than 25dB, the noise reduction coefficient NRC is greater than 0.7, and the refined sound insulation and noise reduction coefficient parameters of frequency dividing sections are lacked; the standard requirements of developed foreign countries on the acoustic performance of the railway sound barrier are relatively comprehensive, and the sound insulation quantity and the noise reduction coefficient at the 1/3OCT center frequency within 20-10 KHz are specified in detail; the acoustic index of the conventional sound absorption and insulation module in China in the medium-high frequency range easily reaches or even exceeds the standard requirement, but the medium-low frequency acoustic performance is poor, which is seriously inconsistent with the requirement of low-frequency noise control in urban rail transit.
With the development of the photovoltaic industry, the photovoltaic sound barrier is produced in accordance with the development trend of the sound barrier. The solar energy power generation technology is combined with the traditional sound barrier, and the sound insulation performance of the sound barrier is realized, and meanwhile, the solar energy is converted into the electric energy to be supplied to other electric facilities. Compared with the conventional photovoltaic industry, the photovoltaic sound barrier does not occupy precious urban land resources, can reduce noise and generate electricity, and has huge market potential and application prospect. Compared with the conventional sound barrier, the photovoltaic sound barrier can create considerable economic benefits in the whole service cycle, and has an obvious beautifying effect on urban roads and rail transit. Nevertheless, there are two core problems to be solved in the application of photovoltaic sound barrier engineering: the photovoltaic sound barrier has the advantages that firstly, the sound absorption and insulation design problem of the photovoltaic sound barrier is solved, namely, the inner side and the outer side of the photovoltaic sound barrier are clamped by transparent toughened glass on the premise of not influencing light transmittance, and if the photovoltaic module is directly adopted as a sound insulation screen body, the sound absorption effect is poor, and noise reflection is easily caused; and secondly, the problem of photovoltaic power generation efficiency is solved, namely, the engineering cost is reduced, and a photovoltaic module is often adopted to directly replace a middle screen body of a conventional sound barrier, so that the photovoltaic module is vertically installed, and only the outer side of the photovoltaic module can receive illumination, which inevitably leads to the reduction of the power generation efficiency of the photovoltaic module.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides a high-efficiency photovoltaic sound barrier, which aims to ensure that the photovoltaic sound barrier has a good sound absorption effect in a medium-low frequency range by adopting the photovoltaic sound barrier screen formed by combining a transparent micro-perforated plate and a photovoltaic module, and the photovoltaic module adopts a single crystal double-sided battery as the photovoltaic module, so that the front side and the back side of the photovoltaic sound barrier have a power generation function, the power generation efficiency of the photovoltaic sound barrier is improved, and the improvement of the sound absorption and insulation performance in the medium-low frequency range is realized.
In order to achieve the purpose, the invention provides a high-efficiency photovoltaic sound barrier, which comprises upright posts and connecting steel frames arranged between the upright posts,
a plurality of photovoltaic sound screen bodies are further arranged between the upright columns, and the photovoltaic sound screen bodies are fixedly connected through the connecting steel frame and then connected with a roadbed of an urban highway or a rail transit system through the upright columns; wherein,
the photovoltaic sound screen body comprises a photovoltaic component, a transparent micro-perforated plate and a sealed cavity arranged between the photovoltaic component and the transparent micro-perforated plate, wherein the transparent micro-perforated plate is used for consuming sound energy by utilizing the back-and-forth friction of air in a small hole when sound waves are transmitted and controlling the resonance frequency of a wave peak by utilizing the aperture size so as to realize middle-low frequency sound absorption; and,
photovoltaic module includes two-sided battery of N type and dual glass assembly, two-sided battery of N type is used for realizing just, back of the body both sides electricity generation simultaneously, the both sides of two-sided battery of N type are dual glass assembly centre gripping is in order to improve the generating efficiency of photovoltaic sound barrier.
Furthermore, the diameter of the micro-perforation of the transparent micro-perforated plate is 0.5-1 mm, and preferably 1 mm.
Further, the perforation rate of the transparent microperforated panel is 1% to 15%, preferably 10%.
Further, the interval of the transparent micro-perforation is 2mm to 8mm, preferably 5 mm.
Further, the thickness of the transparent micro-perforated plate is 1mm to 6mm, preferably 2 mm.
Further, the thickness of the sealed cavity is 50-100 mm, preferably 100 mm.
Further, the structural form of the micro-perforation is a round hole, a square hole, a triangular hole, a pentagon or a hexagon.
Further, the thickness, the perforation rate, the diameter and the spacing of the micro-perforations and the thickness of the sealed cavity of each photovoltaic sound screen body are different.
Further, the circuit of the photovoltaic sound barrier comprises an alternating current load, a public power grid parallel, a direct current load, a controller, a storage battery pack, an anti-reverse charging diode and a DC/AC inverter.
Furthermore, the circuit of the photovoltaic sound barrier can realize independent power supply to the direct current street lamp or the decorative lamp, power supply to the alternating current load and grid-connected power generation of a public power grid.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) according to the efficient photovoltaic sound barrier, the photovoltaic sound barrier screen body comprises the photovoltaic component, the transparent micro-perforated plate and the sealed cavity arranged between the photovoltaic component and the transparent micro-perforated plate, the transparent micro-perforated plate and the photovoltaic component are combined to form the photovoltaic sound barrier screen body with sound absorption and insulation performance, the photovoltaic sound barrier is guaranteed to have good sound absorption effect in a medium-low frequency range, the photovoltaic component adopts the single crystal double-sided battery as the photovoltaic component, the front side and the back side of the photovoltaic sound barrier have a power generation function, and therefore the power generation efficiency of the photovoltaic sound barrier is improved, and the sound absorption and insulation performance in the medium-low frequency range is improved.
(2) According to the high-efficiency photovoltaic sound barrier, the transparent micro-perforated plate is formed by penetrating micropores with the diameter of 0.5-1 mm on the transparent thin plate, the perforation rate is generally 1% -15%, an air layer (also called a sealed cavity) with a certain thickness is reserved at the rear part, and no sound absorption material is filled in the air layer. The transparent micro-perforated plate mainly utilizes the back-and-forth friction of air in the small holes when sound waves pass to consume sound energy, the resonance frequency of a peak is controlled by the size of the cavity, and the larger the cavity is, the lower the resonance frequency is, so that a good middle-low frequency sound absorption effect is achieved.
(3) According to the high-efficiency photovoltaic sound barrier, the N-type double-sided battery is arranged in the high-efficiency photovoltaic sound barrier to realize simultaneous power generation on the front side and the back side, the two sides of the battery are clamped by the transparent glass fiber reinforced plastics, and the front side and the back side of the photovoltaic sound barrier have a power generation function no matter the incident angle of solar rays changes along with the movement of the sun in the morning or afternoon, so that the power generation efficiency of the photovoltaic sound barrier is improved; the photovoltaic module provided by the invention realizes vertical installation by adopting the N-type double-sided battery and the double-glass module, and compared with the traditional structural form of additionally installing the photovoltaic module on the top of the sound barrier, the photovoltaic module not only improves the light receiving surface area of the photovoltaic module, but also simplifies the structure and the installation process flow of the photovoltaic module, reduces the engineering investment cost, and is beneficial to industrialization.
(4) According to the high-efficiency photovoltaic sound barrier, the power generation assembly comprises the photovoltaic assembly, the alternating current load, the public power grid parallel purchase, the direct current load, the controller, the storage battery pack, the anti-reverse charging diode and the DC/AC inverter, three working modes of independently supplying power to the direct current street lamp or the decorative lamp, supplying power to the alternating current load and generating power by the public power grid parallel purchase can be realized, and the application range is wider.
(5) According to the efficient photovoltaic sound barrier, the micro-perforated holes are through holes in various structural forms such as round holes, square holes, triangular holes, pentagons and hexagons, the pore size and the distance arrangement of the micro-perforated holes can be determined according to the noise conditions of actual urban highways and rail transit systems and the sound insulation requirements of residential areas, and therefore the efficient photovoltaic sound barrier is suitable for achieving a good medium-low frequency sound absorption effect and improving the power generation efficiency of the photovoltaic sound barrier.
(6) According to the high-efficiency photovoltaic sound barrier, the photovoltaic sound barrier bodies can be combined for use, namely, two photovoltaic sound barriers with different micro-perforation parameters can be adopted for combining and splicing the same photovoltaic sound barrier body, so that sound absorption in a higher frequency range is realized. Particularly, the aperture and the arrangement interval of the micro-perforation of the first photovoltaic sound screen body and the second photovoltaic sound screen body are different, and different aperture and interval arrangement forms are set according to the difference of the height and the propagation mode of a noise sound source of an automobile or a rail transit train so as to realize multi-level sound absorption and achieve a better sound absorption effect.
Drawings
Fig. 1 is a schematic three-dimensional structure diagram of a high-efficiency photovoltaic sound barrier according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a photovoltaic sound screen according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the power generation principle of the high-efficiency photovoltaic sound barrier according to one embodiment of the present invention;
FIG. 4 is a schematic diagram of an efficient photovoltaic sound barrier photovoltaic module according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a high-efficiency photovoltaic sound barrier according to another embodiment of the present invention;
FIG. 6 is a graph of the sound absorption performance of a microperforated plate structure in accordance with one embodiment of the present invention;
fig. 7 is a graph of the sound absorption performance of a microperforated plate structure in accordance with another embodiment of the present invention.
In all the figures, the same reference numerals denote the same features, in particular: the system comprises a vertical column 1, a photovoltaic sound screen 2, a photovoltaic component 21, a sealed cavity 22, a micro-perforated plate 23, a first photovoltaic sound screen 24, a second photovoltaic sound screen 25, a vertical column 3, an alternating current load 4, a public power grid 5, a direct current load 6, a controller 7, a storage battery pack 8, an anti-reverse charging diode 9 and a DC/AC inverter 10.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
According to the high-efficiency photovoltaic sound barrier, the transparent micro-perforated plate and the photovoltaic module are combined to form the photovoltaic sound barrier screen body with sound absorption and insulation performance in terms of acoustic performance, so that the photovoltaic sound barrier is ensured to have a good sound absorption effect in a medium-low frequency range, and meanwhile, in terms of the photovoltaic power generation module, the single crystal double-sided battery is used as the photovoltaic module, so that the front side and the back side of the photovoltaic sound barrier have a power generation function, and the power generation efficiency of the photovoltaic sound barrier is improved. Specifically, as a first core improvement point of the present invention, the theory of the sound absorption structure of the micro-perforated plate is based on the structure of a common perforated plate. Since the sound resistance of a general perforated plate (perforation diameter is more than 2mm) is small, the sound absorption band is narrow. In order for a general perforated plate sound absorbing structure to effectively absorb sound in a wide range, it is necessary to fill a large amount of porous material behind the perforated plate or to apply a textile having high sound resistance. However, if the diameter of the perforation is reduced to less than 1mm, the sound resistance of the perforated plate can be increased without adding a porous material, the sound absorption coefficient is obviously improved, and the sound absorption bandwidth is obviously increased, namely the perforated plate. The transparent micro-perforated plate provided by the invention is formed by penetrating micropores with the diameter of 0.5-1 mm on a transparent thin plate, the perforation rate is generally 1% -15%, an air layer (also called a sealed cavity, see figure 2) with a certain thickness is reserved at the rear part, and no sound absorption material is filled in the air layer. The micro-perforated plate mainly utilizes the friction of air in the small holes to consume sound energy when sound waves pass through, and utilizes the size of the cavity to control the resonance frequency of a peak, wherein the larger the cavity is, the lower the resonance frequency is. Studies have shown that the sound absorption coefficient and the bandwidth, which characterize the sound absorption characteristics of a microperforated panel, are determined primarily by the acoustic mass m and the acoustic resistance r of the microperforated panel structure. The relative acoustic resistivity and acoustic resistivity of the microperforated panel may be expressed as:
in the formulad is the diameter of the microperforation, c is the speed of sound in air, t is the sheet thickness, σ is the perforation rate of the microperforation sheet, μ is the kinematic viscosity coefficient of air, and ω is the angular velocity. For non-metallic material plates, μ ═ 1.56 × 10-6m/s2In the case of a metal plate, since the heat transfer coefficient is relatively large, the air expansion and contraction in the tube should be regarded as an isothermal process rather than an adiabatic process, and therefore, v + μ should be added to v, which is a temperature transfer coefficient in air, and is 3.56 × 10-6m/s2Instead.
A sealed cavity with the depth of D is reserved behind the micro-perforated plate, namely, a resonance sound absorption structure is formed, and the sound absorption coefficient can be calculated according to the following formula:
in the formula, θ is an angle between the incident direction of the sound wave and the normal direction of the plate surface, and x is ω mcos θ -ctg (ω Dcos θ/c). Therefore, according to the sound absorption principle of the micro-perforated plate, the sound absorption and insulation performance in the medium and low frequency range is improved; and the transparent micro-perforated plate and the photovoltaic module are combined to form the photovoltaic sound barrier module with sound absorption and insulation performance.
As a further improvement of the invention, the photovoltaic sound barrier power generation principle is as follows: fig. 4 is a basic schematic diagram of a photovoltaic sound barrier, wherein the power generation assembly includes a photovoltaic assembly 21, an AC load 4, a power grid parallel 5, a DC load 6, a controller 7, a battery pack 8, an anti-reverse charging diode 9, and a DC/AC inverter 10, and three achievable operation modes include:
(1) independently supplying power to the direct current street lamp or the decorative lamp: the photovoltaic module is connected with the storage battery pack through a lead and is charged through the anti-reverse-charging diode, and the direct-current load is directly supplied with power through the controller.
(2) Supplying power to an alternating current load: the photovoltaic module is connected with the storage battery pack through a lead and is charged through the anti-reverse charging diode, and the direct current is converted into alternating current through the controller and the DC/AC inverter to directly supply power to the alternating current load.
(3) Grid-connected power generation of a public power grid: the photovoltaic module is connected with the anti-reverse charging diode through a lead, and the direct current is converted into alternating current by the grid-connected inverter and is transmitted to a public power grid to realize grid-connected power generation. Currently, the (2) and (3) working modes are the most common.
Fig. 1 is a schematic structural diagram of a high-efficiency photovoltaic sound barrier according to an embodiment of the present invention. As shown in fig. 1, the photovoltaic sound barrier includes a vertical column 1, a photovoltaic screen 2, and a connecting steel frame 3. A plurality of photovoltaic sound screen bodies 2 can be arranged between the stand columns, and the photovoltaic sound screen bodies 2 are fixedly connected through the connecting steel frame 3 and then connected with the roadbed through the stand columns 1.
Fig. 2 is a schematic structural diagram of a photovoltaic sound screen according to an embodiment of the present invention. As shown in fig. 2, the photovoltaic panel 2 comprises a photovoltaic module 21, a transparent microperforated panel 23 and a sealed cavity 22 provided between the photovoltaic module 21 and the transparent microperforated panel 23. The transparent micro-perforated plate 23 is formed by penetrating micro-holes with the hole diameter of 0.5-1 mm on a transparent thin plate, the thickness of the micro-holes is 1-6 mm, the interval is 2-8 mm, the perforation rate is 1-15%, an air layer with a certain thickness is left at the rear part, namely the sealed cavity 32, and the thickness of the sealed cavity 32 is 50-100 mm.
Fig. 4 is a schematic diagram of power generation of a high-efficiency photovoltaic sound barrier photovoltaic module according to an embodiment of the present invention, in a preferred embodiment of the present invention, an N-type double-sided battery + double-glass module is adopted as the photovoltaic module 21. As shown in fig. 4, the N-type double-sided module has a significant advantage in the vertical installation and use of the sound barrier compared with the conventional single-sided module: firstly, an N-type double-sided battery is arranged inside the photovoltaic sound barrier, the front side and the back side of the battery can generate power at the same time, the two sides of the battery are clamped by transparent glass fiber reinforced plastics, and the front side and the back side of the photovoltaic sound barrier have a power generation function no matter the incident angle of solar rays changes along with the movement of the sun in the morning or afternoon, so that the power generation efficiency of the photovoltaic sound barrier is improved, the power generation of a traditional single-sided component is stopped in the morning until the afternoon, and the power generation effect is lower; the photovoltaic module 21 of the invention adopts the N-type double-sided battery and the double-glass module to realize vertical installation, compared with the traditional structural form of additionally installing the photovoltaic module on the top of the sound barrier, the structure not only improves the light receiving surface area of the photovoltaic module, but also simplifies the structure and the installation process flow of the photovoltaic module, reduces the engineering investment cost and is beneficial to industrialization.
In the preferred embodiment of the invention, the micro-perforated holes are through holes in various structural forms such as round holes, square holes, triangular holes, pentagons, hexagons and the like, and the pore size and the distance arrangement of the micro-perforated holes can be determined according to the noise conditions of actual urban highways and rail transit systems and the sound insulation requirements of residential areas, so that good medium-low frequency sound absorption effect is realized and the power generation efficiency of the photovoltaic sound barrier is improved.
In the preferred embodiment of the invention, the photovoltaic sound screen bodies can be used in combination, that is, for the same photovoltaic sound screen body, two photovoltaic sound screens with different micro-perforation parameters can be combined and spliced, so that sound absorption in a wider frequency range is realized. In another embodiment of the present invention, as shown in fig. 5, the micro-perforated holes of the first photovoltaic sound screen 24 and the second photovoltaic sound screen 25 have different apertures and different arrangement distances, and different aperture and distance arrangement forms are set according to different heights and different propagation modes of noise sources of automobiles or rail transit trains, so as to implement multi-level sound absorption and achieve a better sound absorption effect. The photovoltaic sound barrier comprises a first photovoltaic sound screen body 24, a second photovoltaic sound screen body 25, a stand column 1 and a connecting steel frame 3. Wherein, first photovoltaic sound screen body 24 and second photovoltaic sound screen body 25 set up relatively, and its adjacent one side realizes fixed connection through connecting steelframe 3, and its other both sides limit realizes fixed connection through stand 1, stand and urban highway and rail transit system's road bed fixed connection, realize first photovoltaic sound screen body 24 and second photovoltaic sound screen body 25 and road bed stable connection with this mode. As shown in fig. 5, the aperture of the first photovoltaic sound screen 24 is smaller than the aperture of the second photovoltaic sound screen 25, and the layout distance is smaller than the micro-perforation arrangement distance of the second photovoltaic sound screen 25, so that the noise in different height space ranges can be captured and absorbed, and a good sound absorption effect can be achieved.
In one embodiment of the present invention, the micro-perforated plate 23 is a PC strength plate, the thickness is 2mm, the aperture is 1mm, the hole pitch is 5mm, and the depth of the sealed cavity behind the plate is 100mm, under which the sound absorption performance of the photovoltaic sound barrier structure of the present invention is shown in fig. 6. As can be seen from fig. 6, the medium and low frequency photovoltaic sound barrier designed according to the above parameters has a good sound absorption effect within 300Hz to 1000Hz, the sound absorption coefficient is greater than 0.3, and at the same time, the sound absorption coefficient at 500Hz can maximally reach 0.78, and a relatively good medium and low frequency sound absorption effect is achieved within a relatively large bandwidth range (300Hz to 1000 Hz).
In another embodiment of the invention, in order to ensure that the sound insulation is realized by the thicknesses of the toughened glass on the two sides of the photovoltaic module 21, when the total thickness of the toughened glass on the two sides is not less than 10.0mm (5.0 mm for both the outer toughened glass and the inner toughened glass), the sound insulation of the photovoltaic sound barrier is not less than 42 dB. In order to ensure the sound absorption effect, the transparent thin plate is subjected to micro-perforation treatment, the thickness of the transparent thin plate is 2mm, the diameter of each micro-perforation is 1mm, and the hole spacing is 3 mm; the photovoltaic module is used as a rigid backing of the micro-perforated sound absorption structure, the transparent micro-perforated plate and the photovoltaic module are sealed at a certain interval through a metal or nonmetal frame to form a cavity, and the depth of the cavity is 50-100 mm. Through experiments, the sound absorption effect of the high-efficiency photovoltaic sound barrier in the embodiment of the invention is shown in fig. 7, as can be seen from fig. 7, the high-efficiency photovoltaic sound barrier under the design parameters has a good sound absorption effect in the frequency range of 250Hz to 2300Hz, the sound absorption coefficient is greater than 0.3, the maximum sound absorption coefficient at 550Hz can reach 0.82, the average sound absorption coefficient of the whole frequency band is about 0.5, and the control requirement of noise passing through vehicles can be effectively met. The high-efficiency photovoltaic sound barrier can realize good sound absorption effect (the average sound absorption coefficient of the whole frequency band is about 0.5) under the design parameters, and the bandwidth of the sound absorption frequency band is large (the frequency range of 250Hz to 2300 Hz).
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A high-efficiency photovoltaic sound barrier comprises upright posts and connecting steel frames arranged between the upright posts, and is characterized in that the upright posts are provided with a plurality of connecting steel frames;
a plurality of photovoltaic sound screen bodies are further arranged between the upright columns, and the photovoltaic sound screen bodies are fixedly connected through the connecting steel frame and then connected with a roadbed of an urban highway or a rail transit system through the upright columns; wherein,
the photovoltaic sound screen body comprises a photovoltaic component, a transparent micro-perforated plate and a sealed cavity arranged between the photovoltaic component and the transparent micro-perforated plate, wherein the transparent micro-perforated plate is used for consuming sound energy by utilizing the back-and-forth friction of air in a small hole when sound waves are transmitted and controlling the resonance frequency of a wave peak by utilizing the aperture size so as to realize middle-low frequency sound absorption; and,
photovoltaic module includes two-sided battery of N type and dual glass assembly, two-sided battery of N type is used for realizing just, back of the body both sides electricity generation simultaneously, the both sides of two-sided battery of N type are dual glass assembly centre gripping is in order to improve the generating efficiency of photovoltaic sound barrier.
2. The efficient photovoltaic sound barrier according to claim 1, wherein the diameter of the micro-perforation of the transparent micro-perforated plate is 0.5-1 mm, preferably 1 mm.
3. A high efficiency photovoltaic sound barrier according to claim 1 or 2, wherein the perforation rate of the transparent microperforated sheet is between 1% and 15%, preferably 10%.
4. A high efficiency photovoltaic sound barrier according to any one of claims 1 to 3, wherein the transparent micro-perforations have a pitch of 2mm to 8mm, preferably 5 mm.
5. The pv sound barrier according to any one of claims 1 to 4, wherein the transparent microperforated sheet has a thickness of 1mm to 6mm, preferably 2 mm.
6. A high efficiency photovoltaic sound barrier according to any one of claims 1 to 5, wherein the thickness of the sealed cavity is 50 to 100mm, preferably 100 mm.
7. A high efficiency photovoltaic sound barrier according to any one of claims 1 to 6, wherein said micro-perforations are in the form of circular holes, square holes, triangular holes, pentagons or hexagons.
8. A high efficiency photovoltaic sound barrier according to any one of claims 1 to 7, wherein the thickness, perforation rate, diameter, spacing of the microperforations and the thickness of the sealed cavity of each microperforation is different.
9. The high efficiency photovoltaic sound barrier according to any one of claims 1 to 8, wherein the circuit of the photovoltaic sound barrier comprises an AC load, a utility grid tie, a DC load, a controller, a battery pack, an anti-reverse charging diode, and a DC/AC inverter.
10. The efficient photovoltaic sound barrier according to any one of claims 1 to 9, wherein the circuit of the photovoltaic sound barrier is capable of supplying power independently to a dc street lamp or a decorative lamp, supplying power to an ac load, and generating power by grid connection of a public power grid.
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Application publication date: 20181116 |