CN221103301U - Low operating temperature photovoltaic photo-thermal assembly - Google Patents
Low operating temperature photovoltaic photo-thermal assembly Download PDFInfo
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- CN221103301U CN221103301U CN202322393414.2U CN202322393414U CN221103301U CN 221103301 U CN221103301 U CN 221103301U CN 202322393414 U CN202322393414 U CN 202322393414U CN 221103301 U CN221103301 U CN 221103301U
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Abstract
The utility model belongs to the technical field of solar energy, and particularly discloses a low-working-temperature photovoltaic and photo-thermal assembly, which comprises a back plate layer, wherein the surface of the back plate layer is contacted with an evaporator, the evaporator is communicated with a heat pump through an evaporator pipeline, and the heat pump is used for driving a heat conducting medium in the evaporator to circulate; the heat pump is also connected to a water circulation system through a pipeline, and the water circulation system is used for carrying out heat exchange with the heat conducting medium. According to the photovoltaic module, the evaporator with the metal tube structure is arranged on the back of the conventional module, the inlet and the outlet of the evaporator are connected with the heat pump for cooling, the phase change material in the heat pump brings out the heat of the photovoltaic module through circulation in the evaporator, and the heat is stored in the heat storage water tank in a hot water mode through the circulating water system, so that the working temperature of the photovoltaic module can be effectively reduced, the absorbed heat can be converted into hot water for life use, and the heating energy consumption in life is saved.
Description
Technical Field
The utility model belongs to the technical field of solar energy, and particularly relates to a photovoltaic photo-thermal assembly with low working temperature.
Background
The photovoltaic module in the prior art is a basic power generation unit in a distributed photovoltaic power station, a plurality of modules are connected in series to form a module string when in use, and then the battery string is connected in parallel or directly connected into a photovoltaic special inverter to carry out grid connection or off-grid power generation, so that load power is supplied.
Because of the temperature characteristics of the photovoltaic module, the output power of the photovoltaic module changes under the influence of temperature. The power temperature coefficient of the photovoltaic module of the common crystalline silicon single crystal technology is-0.3%, namely, the output power can be reduced by 0.3% when the working temperature of the photovoltaic module is increased by 1 ℃. The solar energy conversion efficiency of the normal photovoltaic module is 22%, and the residual 78% of solar energy capacity is almost converted into heat of the module, so that the module can work at about 20 ℃ higher than the ambient temperature. In the prior art, the solar energy conversion efficiency of the photovoltaic module reaches about 22% at the maximum (25 ℃/1000W/square meter) under the STC condition, but in actual work, the actual working temperature of the module is generally higher than 45 ℃, and the conversion efficiency of the module is reduced by 0.3% when the temperature of the module rises by 1 ℃ due to the existence of the temperature coefficient of the photovoltaic module, and the conversion efficiency of the module is reduced by about 6% when the module is actually operated. And the aging speed of the constituent materials of the photovoltaic module is increased under the condition of high temperature for a long time, thereby indirectly influencing the service life of the module.
Various schemes are proposed in the prior art to solve the problem, for example, the Chinese patent utility model of publication No. CN116565050A proposes a heat dissipation photovoltaic module, a heat radiation material is added in a glue film, the structure of the glue film is optimized, heat generated by the operation of a battery piece is transferred to a photovoltaic glass interface, and the photovoltaic glass has a higher heat conductivity coefficient, so that the heat dissipation efficiency of the module can be greatly improved, and the heat dissipation performance in the module is improved; the solar cell comprises photovoltaic front plate glass, transparent adhesive films, cell slices, heat dissipation adhesive films and photovoltaic rear plate glass which are sequentially arranged from top to bottom; the heat radiation adhesive film consists of a heat emission layer, a transparent layer and a shielding layer, and the heat emission layer is contacted with the battery piece; the matrix resin of the heat emission layer, the transparent layer and the shielding layer is polyolefin POE elastomer; the heat emission layer contains 0.1-80% of polymer radiation microspheres, and the polymer microspheres are made of one or more of PDMS, PTFE, PVDF, PVF, polymethylpentene and polyvinylidene fluoride-hexafluoropropylene copolymer. In addition, the Chinese patent of publication No. CN206976371U proposes a high-heat-dissipation low-temperature photovoltaic module.
However, the above-mentioned prior art only improves the heat dissipation capability of the photovoltaic module by improving the structure of the photovoltaic module, and has limited effect, and the working temperature of the photovoltaic module cannot be greatly reduced.
Disclosure of utility model
Aiming at the problems of overhigh temperature and low output efficiency of the photovoltaic module during working, the utility model provides a low-working-temperature photovoltaic and photo-thermal module which can reduce the working temperature of the photovoltaic module, improve the solar energy conversion efficiency of the photovoltaic module, and simultaneously can produce hot water for domestic water and heating.
In order to achieve the above purpose, the utility model provides a low-working-temperature photovoltaic and photo-thermal assembly, which comprises a back plate layer, wherein the surface of the back plate layer is contacted with an evaporator, the evaporator is communicated with a heat pump through an evaporator pipeline, and the heat pump is used for driving a heat conducting medium in the evaporator to circulate; the heat pump is also connected to a water circulation system through a pipeline, and the water circulation system is used for carrying out heat exchange with the heat conducting medium.
Based on the structure, the photovoltaic module is provided with the evaporator with the metal tube structure on the back of the photovoltaic module on the basis of the conventional single-glass/double-glass module, the inlet and the outlet of the evaporator are connected with the heat pump for cooling, the phase change material in the heat pump brings out the heat of the photovoltaic module through the internal circulation of the evaporator, and the heat is stored in the heat storage water tank in the form of hot water through the circulating water system, so that the working temperature of the photovoltaic module can be effectively reduced, the absorbed heat can be converted into hot water for life use, and the heating energy consumption in life is saved.
Preferably, the water circulation system comprises a circulation pump, a heat storage water tank and a circulation pipeline, wherein the circulation pipeline penetrates into the heat pump.
Preferably, the evaporator is a plurality of metal tubes which are paved on the back plate layer at intervals.
Preferably, the evaporator is adhered to the surface of the back plate layer through heat conduction structure adhesive.
Preferably, the back plate layer is toughened glass.
Preferably, the low-working-temperature photovoltaic photo-thermal assembly further comprises a temperature sensor and a control unit, wherein the temperature sensor is located on the back surface of the back plate layer, and the control unit is connected with the heat pump through a control circuit and is connected to the temperature sensor through a temperature sensor circuit.
Preferably, a photovoltaic photo-thermal assembly, the evaporator and the heat pump form a heat exchange unit, and a plurality of heat exchange units are connected in series/parallel and then connected to a water circulation system.
Preferably, the heat exchange medium contained in the water circulation system is domestic water.
Preferably, the heat conducting medium in the evaporator is a phase change material.
Compared with the prior art, the photovoltaic module further comprises a heat pump, a circulating water pump, a heat storage water tank, a control unit and other accessories which use the direct-current compressor, and has the following technical effects and advantages:
1. the working temperature of the photovoltaic module is reduced, and the solar energy conversion efficiency of the photovoltaic module is improved.
2. The component is provided with the heat recovery device, so that the comprehensive utilization of the photo-thermal and photo-electricity of the photovoltaic power generation system can be realized, and the utilization efficiency of renewable energy sources is improved.
3. Because the assembly works in a low-temperature environment for a long time, the aging process of the assembly materials is relieved, and the service life of the photovoltaic assembly is effectively prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the front and back side structure of a photovoltaic module of the prior art;
FIG. 2 is a cross-sectional view of a prior art photovoltaic module;
FIG. 3 is a schematic diagram of the back side structure and system connections of the low operating temperature photovoltaic photo-thermal module of the present utility model;
Fig. 4 is a cross-sectional view of a low operating temperature photovoltaic photo-thermal assembly of the present utility model.
Wherein: 1. a front glass; 2. a front adhesive film; 3. a battery sheet; 4. a back adhesive film; 5. a backing layer; 6. a junction box; 7. a component frame; 8. a heat conducting structural adhesive; 9. an evaporator; 10. a control unit; 11. a heat pump; 12. a circulation pump; 13. a heat storage water tank; 14. a temperature sensing circuit; 15. a control circuit; 16. evaporator piping.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
Referring to fig. 1 and 2, fig. 1 shows a front structural view (left view) and a rear structural view (right view) of a related art photovoltaic module, and fig. 2 shows a cross-sectional view of the related art photovoltaic module. Among the prior art, photovoltaic module includes laminate, subassembly frame 7 and terminal box 6, and the laminate includes from top to bottom stack gradually encapsulation front glass 1, front glued membrane 2, battery piece 3, back glued membrane 4, backplate layer 5, and the periphery edge at the laminate is packaged to the subassembly frame 7, and the terminal box 6 is connected at the back of laminate, and this structure is prior art's conventional design, and the description is omitted here. The photovoltaic module in the prior art has no measure for effectively reducing the working temperature, so that the temperature of the photovoltaic module is too high when the photovoltaic module works, and the output power is reduced; because the photovoltaic module works in a high-temperature environment for a long time, the high-molecular component materials in the photovoltaic module are easy to age, and the long-term service life of 25 years or even 30 years is difficult to ensure.
Referring to fig. 3 and 4, fig. 3 shows a structural diagram of a low operating temperature photovoltaic photo-thermal module according to an embodiment of the present utility model, where the low operating temperature photovoltaic photo-thermal module includes the above-mentioned photovoltaic module according to the prior art, that is, includes a laminate, a module frame 7 and a junction box 6, and the laminate includes a front glass 1, a front adhesive film 2, a battery sheet 3, a back adhesive film 4, and a back sheet layer 5, which are sequentially stacked and packaged from top to bottom, and a heat conducting structural adhesive 8 and an evaporator 9 are disposed under the back sheet layer 5, that is, on the back of the module. The front structure and the appearance of the assembly are consistent with those of the prior art, the back of the assembly is uniformly provided with the evaporator 9, the copper pipe heat conduction structural adhesive 8 of the evaporator 9 is adhered to the surface of the back plate layer 5, the heat conduction medium of the phase change material flows in the evaporator 9, the heat conduction medium flows out of the heat pump 11, the heat generated by the photovoltaic assembly is absorbed at the back of the assembly, the liquid state is changed into the gas state, and then the gas flows into the heat pump 11 through the evaporator pipeline 16; the heat pump 11 uses a direct-current compressor, is communicated to the evaporator 9 through a liquid inlet pipe and a liquid outlet pipe of the evaporator pipeline 16, the heat pump 11 is connected with a water circulation system, and the heat absorbed by a heat conducting medium is conducted to the water circulation system, so that on one hand, the water in the water circulation system is heated, on the other hand, the heat is conducted out, the rapid cooling of the photovoltaic module is realized, the heat conducting medium is converted into a liquid state after releasing heat, and is pumped into the evaporator 9 at the back of the photovoltaic module through the heat pump 11 again to enter the next heat absorption cycle; the water circulation system comprises a circulation pump 12 and a heat storage water tank 13, the heat storage water tank 13 is communicated with the heat pump 11 through two water inlet and outlet pipelines, the circulation pump 12 is arranged on one pipeline, the circulation pump 12 pumps cold water in the heat storage water tank 13 into the heat pump 11, absorbs heat of a heat conducting medium to raise temperature, flows back to the heat storage water tank 13 and circulates reciprocally, heat in the assembly is gradually converted into the heat storage water tank 13, and hot water in the heat storage water tank 13 can be used as domestic hot water and also can be used as a heating heat source.
Further optimizing scheme, this embodiment still includes control unit 10, and control unit 10 passes through control circuit 15 electricity and connects heat pump 11 to communicate the temperature sensor who sets up at photovoltaic module back through temperature sensing circuit 14, and then detect photovoltaic module temperature, and compare with the settlement temperature, send control signal to heat pump 11 after judging, control heat pump 11's operating time and power, thereby realize photovoltaic module's operating temperature and reach the purpose of settlement temperature.
Further optimizing scheme, can use a plurality of photovoltaic modules to carry out the cluster/parallelly connected at the hot water end, promptly monolithic photovoltaic module includes devices such as heat pump 11 and evaporimeter 9 to connect to one or more water circulation system after the cluster/parallelly connected to reach the purpose that increases hot water output, can satisfy more hot water demand of user.
According to a further optimization scheme, the evaporator 9 is a plurality of copper pipes or other metal pipes which are arranged on the surface of the back plate layer 5 of the photovoltaic module at intervals, two ends of each copper pipe or metal pipe are respectively connected to a total inlet pipe and a liquid outlet pipe, and each copper pipe or metal pipe is adhered to the surface of the back plate layer 5 through heat conduction structural adhesive 8.
It should be understood that the evaporator 9 may be made of other polymer materials such as PVC plastic, and may be arranged at intervals, or may be arranged in other manners, such as a spiral arrangement, a zigzag arrangement, a serpentine arrangement, and the like.
In a further optimized scheme, the back plate layer 5 is made of toughened glass, and a double-glass assembly comprising the back glass is formed, so that the photoelectric conversion efficiency and the heat conduction capability are improved.
It should be understood that the back sheet layer 5 may be a conventional back sheet, or a PET polymer, or coated glass, or the like, in addition to the tempered glass.
The utility model has the technical effects and advantages that:
1. Based on the structure of the photovoltaic module, the working temperature of the photovoltaic module can be lower than the ambient temperature by 20 ℃, and compared with the temperature difference of the conventional module close to 40 ℃, the photovoltaic conversion efficiency of the module is improved by 12%, and the generated energy is improved.
2. The photovoltaic module of the embodiment uses the heat pump with extra energy consumption as a cold source for cooling the module, but the heat pump can convert the absorbed heat into hot water for life use, thereby saving the energy consumption for heating and heating in life.
3. The electrical performance of the photovoltaic module of the embodiment is equivalent to that of a conventional photovoltaic module, and the photovoltaic module can be connected with the conventional module in series-parallel in a mixing manner during installation.
4. The heat pump module and the single module of the photovoltaic module of the embodiment are a unit with complete functions, and a plurality of units can be connected in series and parallel to meet the actual needs of users.
The present utility model is not limited to the conventional technical means known to those skilled in the art.
In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.
Claims (9)
1. The low-working-temperature photovoltaic photo-thermal assembly comprises a back plate layer (5), and is characterized in that the surface of the back plate layer (5) is contacted with an evaporator (9), the evaporator (9) is communicated with a heat pump (11) through an evaporator pipeline (16), and the heat pump (11) is used for driving a heat conducting medium in the evaporator (9) to circulate; the heat pump (11) is also connected to a water circulation system in a pipeline, and the water circulation system is used for carrying out heat exchange with the heat conducting medium.
2. The low operating temperature photovoltaic photo-thermal assembly according to claim 1, characterized in that the water circulation system comprises a circulation pump (12), a hot water storage tank (13) and a circulation line, which runs through to the inside of the heat pump (11).
3. The low operating temperature photovoltaic photo-thermal module according to claim 1, characterized in that the evaporator (9) is a plurality of metal tubes laid at intervals on the backsheet layer (5).
4. A low operating temperature photovoltaic photo-thermal assembly according to claim 3, characterised in that the evaporator (9) is glued to the surface of the backsheet layer (5) by means of a heat-conducting structural glue (8).
5. The low operating temperature photovoltaic optothermal assembly of claim 4 wherein the backsheet layer (5) is a tempered glass.
6. The low operating temperature photovoltaic photo-thermal assembly according to claim 1, further comprising a temperature sensor and a control unit (10), the temperature sensor being located at the back side of the back sheet layer (5), the control unit (10) being connected to the heat pump (11) by a control line (15) and to the temperature sensor by a temperature sensor line (14).
7. The low operating temperature photovoltaic photo-thermal module according to claim 1, characterized in that one photovoltaic photo-thermal module, the evaporator (9) and the heat pump (11) form a heat exchange unit, and a plurality of heat exchange units are connected in series/parallel and then connected to a water circulation system.
8. The low operating temperature photovoltaic photo-thermal module of claim 1 wherein the heat exchange medium contained in the water circulation system is domestic water.
9. The low operating temperature photovoltaic photo-thermal assembly according to claim 1, characterized in that the heat conducting medium in the evaporator (9) is a phase change material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322393414.2U CN221103301U (en) | 2023-09-05 | 2023-09-05 | Low operating temperature photovoltaic photo-thermal assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322393414.2U CN221103301U (en) | 2023-09-05 | 2023-09-05 | Low operating temperature photovoltaic photo-thermal assembly |
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| CN221103301U true CN221103301U (en) | 2024-06-07 |
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| CN202322393414.2U Active CN221103301U (en) | 2023-09-05 | 2023-09-05 | Low operating temperature photovoltaic photo-thermal assembly |
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| CN (1) | CN221103301U (en) |
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- 2023-09-05 CN CN202322393414.2U patent/CN221103301U/en active Active
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