Photovoltaic and photo-thermal integrated assembly structure based on aluminum heat collector

Abstract

The utility model discloses a photovoltaic photo-thermal integrated assembly structure based on an aluminum heat collector, which comprises two gathering pipes arranged in parallel, each gathering pipe is provided with an inflow port and an outflow port, a micro-channel pipe array is arranged between the two gathering pipes, and two opposite ends of the micro-channel pipe array are respectively communicated with the two gathering pipes. According to the utility model, the two aluminum gathering pipes are arranged and connected with the aluminum micro-channel pipe array in a laser welding or brazing manner, and the design of a plurality of quick connectors is matched, so that the problems of large weight, low heat efficiency and poor expansibility of the traditional PVT assembly are solved; according to the invention, the balance of high pressure bearing, easy installation and dynamic sealing is realized, the reliability bottleneck of a traditional PVT assembly under complex working conditions is overcome, the purposes of good sealing performance, efficient heat conduction, light weight and low cost can be achieved, and a key technical support is provided for large-scale commercial application.

Description

TECHNICAL FIELD

[0001] The utility model belongs to solar energy utilization technical field, concretely relates to a photovoltaic-thermal integrated assembly structure based on aluminium heat collector. BACKGROUND

[0002] Traditional photovoltaic-thermal integrated (Photovoltaic-Thermal, PVT) assembly usually adopts single circulating pipeline or asymmetric structure design, and there are many problems such as low heat exchange efficiency, uneven fluid distribution, heavy weight, complex installation, etc. In the prior art, the collection pipe is matched with multiple pipelines to form a PVT assembly, which improves the heat exchange efficiency to a certain extent, but the existing PVT assembly cannot effectively balance the heat exchange efficiency and manufacturing cost, and is heavy, poor in installation flexibility, and still has a large improvement space. In addition, since the collection pipe adopts copper material or single interface design, there are problems such as high cost, large system pressure drop, and difficulty in adapting to complex circulating system.

[0003] Based on this, the utility model discloses a photovoltaic-thermal integrated assembly structure based on aluminium heat collector. UTILITY MODEL CONTENTS

[0004] To solve the technical problems existing in the prior art, the purpose of the utility model is to provide a photovoltaic-thermal integrated assembly structure based on aluminium heat collector.

[0005] To achieve the above purpose and achieve the above technical effect, the utility model adopts the technical scheme that:

[0006] A photovoltaic-thermal integrated assembly structure based on aluminium heat collector, comprising two parallelly arranged collection pipes, a flow inlet and a flow outlet are arranged on each of the two collection pipes, a microchannel pipe array is arranged between the two collection pipes, and opposite ends of the microchannel pipe array are respectively connected with the two collection pipes.

[0007] Further, the two collection pipes are a first collection pipe and a second collection pipe, a first flow inlet and a first flow outlet are arranged at opposite ends of the first collection pipe, a second flow inlet and a second flow outlet are arranged at opposite ends of the second collection pipe, the first flow inlet and the second flow outlet are diagonally arranged, and the first flow outlet and the second flow inlet are diagonally arranged.

[0008] Further, the first collection pipe and the second collection pipe are respectively circular aluminium pipes, and the two ends of the first collection pipe and the second collection pipe are flattened into rectangular transition sections matched with the welding surfaces of the microchannel pipe array.

[0009] Further, the wall thicknesses of the first collection pipe and the second collection pipe are respectively 1.5-2.5 mm.

[0010] Further, the first flow inlet, the first flow outlet, the second flow inlet and the second flow outlet are respectively provided with a quick connector, and the quick connector is embedded with a high-temperature-resistant fluorine rubber O-shaped ring.

[0011] Further, the quick connector is welded on the first flow inlet, the first flow outlet, the second flow inlet and the second flow outlet, and the outer wall of the quick connector is provided with an anti-skid pattern.

[0012] Further, the micro-channel pipe array has a cross-section of a flat porous structure, and a plurality of flow channels are arranged in parallel inside the micro-channel pipe array, and opposite ends of each flow channel are respectively connected with two collecting pipes.

[0013] Further, the collecting pipe and the micro-channel pipe array are connected by laser welding or brazing, and the welding areas of the two are of a corrugated structure.

[0014] Further, the outer surface of the micro-channel pipe array is coated with a heat-conducting glue and is attached to a photovoltaic cell layer.

[0015] Further, the collecting pipe is connected with an external circulating pump through a flow inlet and a flow outlet and is further connected with a heat storage device.

[0016] Compared with the prior art, the photovoltaic-thermal integrated component structure based on the aluminum heat collector has the advantages that:

[0017] The utility model discloses a photovoltaic-thermal integrated component structure based on aluminum heat collector sets up two aluminum collecting pipes and is connected by laser welding or brazing mode with aluminum micro -channel pipe array, and is matched with quick connector design, has solved the problem of traditional PVT component heavy, low thermal efficiency and poor expansibility, realizes high pressure -bearing, easy installation and dynamic sealing balance through the collaborative design of collecting pipe and quick connector, has overcome the reliability bottleneck of traditional PVT component under complex working condition, can reach good sealing, high -efficient heat conduction, light weight, the purpose of low cost, provides key technical support for large -scale commercial application. ACCOUT OF DRAWINGS

[0018] Figure 1 It is the whole structure schematic diagram of the utility model;

[0019] Figure 2 It is the whole structure schematic diagram of the utility model; Figure 1 It is the local enlarged view of A place in the middle;

[0020] Figure 3 It is the local sectional view of the collecting pipe and the quick connector of the utility model;

[0021] Figure 4 It is the fluid flow direction schematic diagram of the utility model;

[0022] Figure 5The fluid dynamics diagram of the utility model. DETAILED DESCRIPTION

[0023] The utility model is described in detail below, so that the advantages and characteristics of the utility model can be more easily understood by those skilled in the art, so that the protection scope of the utility model can be more clearly and explicitly defined.

[0024] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

[0025] As Figures 1-5 Indicated, a kind of photovoltaic light heat integration component structure based on aluminum collector, including two parallelly arranged collecting pipes, two collecting pipes are respectively marked as first collecting pipe 1 and second collecting pipe 2, the opposite ends of first collecting pipe 1 are provided with first flow inlet 3 and first flow outlet 4 respectively, the opposite ends of second collecting pipe 2 are provided with second flow inlet 5 and second flow outlet 6 respectively, first flow inlet 3 and second flow outlet 6 are diagonally arranged, first flow outlet 4 and second flow inlet 5 are diagonally arranged, above-mentioned four mouths are symmetrically designed, support bidirectional fluid input / output, adapt to series or parallel system topology, fluid diagonal in and out, can increase the versatility of photovoltaic light heat integration component structure, reduce system pressure drop and adapt to multiple installation scenes, microchannel tube array 7 is arranged between first collecting pipe 1 and second collecting pipe 2, the section of microchannel tube array 7 is flat porous structure, several flow channels are arranged in parallel in microchannel tube array 7, for increasing the contact area with circulating medium, the opposite ends of each flow channel are connected with the communication of the two collecting pipes of first collecting pipe 1 and second collecting pipe 2.

[0026] In the utility model, two collecting pipes and microchannel tube array 7 are connected by laser welding or brazing mode, ensure the sealing property and heat transfer efficiency, the welding area of collecting pipe and microchannel tube array 7 adopts corrugated structure, enhances the connection strength and compensates thermal expansion stress.

[0027] Collecting pipe and microchannel tube array 7 are made of aluminum material, can reduce the weight of photovoltaic light heat integration component structure, reduce manufacturing cost, can also improve corrosion resistance and prolong service life by surface oxidation treatment.

[0028] First collecting pipe 1 and second collecting pipe 2 are respectively made of circular aluminum pipe, and the wall thickness is 1.5-2.5mm, the overall pressure-bearing capacity of component is improved by the uniform stress characteristics of circular pipe, can reach more than 1.5MPa, while reducing fluid flow resistance.

[0029] The two ends of the first collecting pipe 1 and the second collecting pipe 2 are flattened into rectangular transition sections, which are matched with the welding surfaces of the micro-channel pipe array 7.

[0030] The first flow inlet 3, the first flow outlet 4, the second flow inlet 5 and the second flow outlet 6 are respectively welded with quick connectors 8, the root of the connector is reinforced by welding, the high-temperature-resistant fluororubber O-ring is embedded in the quick connector 8, the outer wall of the quick connector 8 is provided with anti-skid lines, which is convenient for manual operation, supports plug and play, the connector form can be a threaded screw type or a buckle type, which can adapt to different installation scenes. By combining the round pipe structure of the collecting pipe with the quick connector 8, the pressure strength of the component structure is improved by more than 30%, which is suitable for high-pressure circulating systems such as high-rise buildings, at the same time, by setting the quick connector 8, the installation time can be reduced by more than 50%, and the O-ring sealing does not need additional glue or tightening tools, the dynamic sealing is realized through the compression deformation of the high-temperature-resistant fluororubber O-ring, and the leakage risk caused by long-term thermal expansion and cold contraction is reduced.

[0031] The material of the high-temperature-resistant fluororubber O-ring can be flexibly selected according to the type of working medium, such as EPDM rubber for glycol solution and silicon rubber for water medium.

[0032] The photovoltaic and photo-thermal integrated component structure disclosed by the utility model can achieve the following effects:

[0033] Efficient heat conduction: the high thermal conductivity of the micro-channel pipe array 7 and the aluminum collecting pipe significantly improves the heat collection efficiency of the photovoltaic and photo-thermal integrated component structure;

[0034] Uniform flow field distribution: Figure 5 It is a fluid dynamics cloud chart, and it can be seen that the flow field distribution is uniform and there is no obvious low-speed vortex area;

[0035] High flexibility: the four-interface design supports multi-component series / parallel connection, and adapts to complex energy systems;

[0036] Low cost and light weight: aluminum material replaces copper material, reducing material cost and installation difficulty;

[0037] High pressure and long service life: the circular collecting pipe improves the pressure strength of the component by more than 30%, which is suitable for high-pressure circulating systems such as high-rise buildings;

[0038] Convenient installation: the installation time is reduced by more than 50% by setting the quick connector 8, and the O-ring sealing does not need additional glue or tightening tools;

[0039] Sealing reliability: stable within the temperature range of-20℃ to 120℃, and the leakage rate is less than 0.1 mL / min.

[0040] The manufacturing process of the photovoltaic and photo-thermal integrated component structure disclosed by the utility model is:

[0041] Pipe processing: The two ends of the aluminum collector pipe are flattened into rectangular transition sections by a hydraulic press to ensure that the welding surface matches the micro-channel pipe array 7;

[0042] Joint assembly: Quick couplings 8 are welded at the flow inlet and flow outlet of the collector pipe, with built-in high-temperature-resistant fluororubber O-rings;

[0043] Assembly manufacturing: The aluminum collector pipe is connected to the micro-channel pipe array 7 through an automated welding device, and after welding, it is subjected to air tightness testing;

[0044] System application: The collector pipe is connected to the external circulating pump through the flow inlet and flow outlet and then connected to the heat storage device, realizing the dual functions of photovoltaic power generation and heat collection;

[0045] Pressure test: After the assembly structure is assembled, it is tested under 1.0 MPa static water pressure for 20-30 min, and after verification of no leakage, the photovoltaic cell layer is integrated (a conductive adhesive is coated on the outer surface of the micro-channel pipe array 7, and the photovoltaic cell layer is attached, which can be packaged into an integrated panel structure, realizing the synergistic effect of photoelectricity and photothermal).

[0046] Example 1

[0047] As shown in Figures 1-5 , a photovoltaic-thermal integrated assembly structure based on an aluminum heat collector includes two parallel collector pipes, which are respectively denoted as a first collector pipe 1 and a second collector pipe 2. The first collector pipe 1 is provided with a first flow inlet 3 and a first flow outlet 4 at opposite ends, and the second collector pipe 2 is provided with a second flow inlet 5 and a second flow outlet 6 at opposite ends. The first flow inlet 3 and the second flow outlet 6 are diagonally arranged, and the first flow outlet 4 and the second flow inlet 5 are diagonally arranged. The above four ports are symmetrically designed to support bidirectional fluid input / output, adapt to series or parallel system topology, and increase the versatility of the photovoltaic-thermal integrated assembly structure, reduce system pressure drop, and adapt to various installation scenarios. An aluminum micro-channel pipe array 7 is arranged between the first collector pipe 1 and the second collector pipe 2. The cross section of the micro-channel pipe array 7 is a flat porous structure, and a plurality of flow channels are arranged in parallel inside the micro-channel pipe array 7 to increase the contact area with the circulating medium. Each flow channel is connected to the two collector pipes of the first collector pipe 1 and the second collector pipe 2 at opposite ends.

[0048] The two collector pipes and the micro-channel pipe array 7 are connected by laser welding to ensure sealing and heat transfer efficiency. The welding area of the collector pipe and the micro-channel pipe array 7 adopts a corrugated structure to enhance the connection strength and compensate for thermal expansion stress.

[0049] The collecting pipe and the micro-channel pipe array 7 are made of aluminum material, which can reduce the weight of the photovoltaic and photo-thermal integrated component structure, reduce the manufacturing cost, and improve the corrosion resistance and service life through surface oxidation treatment.

[0050] The first collecting pipe 1 and the second collecting pipe 2 are respectively circular aluminum pipes with a wall thickness of 1.5 mm, which can improve the overall pressure-bearing capacity of the component through the uniform stress characteristics of the circular pipe, and can reach more than 1.5 MPa, while reducing the fluid flow resistance.

[0051] The two ends of the first collecting pipe 1 and the second collecting pipe 2 are flattened into rectangular transition sections, which are matched with the welding surface of the micro-channel pipe array 7.

[0052] The first flow inlet 3, the first flow outlet 4, the second flow inlet 5 and the second flow outlet 6 are respectively welded with quick connectors 8, the root of the connector is reinforced by welding, the high-temperature-resistant fluororubber O-ring is embedded in the quick connector 8, the outer wall of the quick connector 8 is provided with anti-skid lines, which is convenient for manual operation, supports plug and play, and the connector form can be screwing or buckling, which can adapt to different installation scenes. By combining the collecting pipe circular pipe structure with the quick connector 8, the pressure resistance of the component structure is improved by more than 30%, which is suitable for high-pressure circulation systems such as high-rise buildings, at the same time, by setting the quick connector 8, the installation time can be reduced by more than 50%, and the O-ring sealing does not need additional glue or tightening tools, the dynamic sealing is realized through the compression deformation of the high-temperature-resistant fluororubber O-ring, which reduces the risk of leakage caused by long-term thermal expansion and cold contraction.

[0053] The material of the high-temperature-resistant fluororubber O-ring can be flexibly selected according to the type of working medium, such as EPDM rubber for glycol solution and silicon rubber for water medium.

[0054] The photovoltaic and photo-thermal integrated component structure disclosed in the embodiment can achieve the following effects:

[0055] High-efficiency heat conduction: the combination of the micro-channel pipe array 7 and the aluminum collecting pipe significantly improves the heat collection efficiency of the photovoltaic and photo-thermal integrated component structure;

[0056] High flexibility: the four-interface design supports multiple-component series / parallel connection, which is suitable for complex energy systems;

[0057] Low cost and light weight: aluminum material replaces copper material, which reduces material cost and installation difficulty;

[0058] High pressure resistance and long service life: the circular collecting pipe improves the pressure resistance of the component by more than 30%, which is suitable for high-pressure circulation systems such as high-rise buildings;

[0059] Convenient installation: the setting of the quick connector 8 reduces the installation time by more than 50%, and the O-ring sealing does not need additional glue or tightening tools;

[0060] Sealing reliability: stable in the temperature range of -20℃ to 120℃, leakage rate less than 0.1 mL / min.

[0061] The manufacturing process of the photovoltaic and photothermal integrated component structure disclosed in the embodiment is as follows:

[0062] Round tube processing: the two ends of the aluminum collecting tube are flattened into rectangular transition sections by a hydraulic machine to ensure that the welding surfaces match the micro-channel tube array 7;

[0063] Joint assembly: quick couplings 8 are welded at the flow inlet and flow outlet of the collecting tube, with built-in high-temperature-resistant fluororubber O-rings;

[0064] Component manufacturing: the aluminum collecting tube is connected with the micro-channel tube array 7 through an automatic welding device, and after welding, the air tightness is detected;

[0065] System application: the collecting tube is connected with an external circulating pump through the flow inlet and flow outlet and then connected with a heat storage device, realizing the dual functions of photovoltaic power generation and heat energy collection;

[0066] Pressure test: after the component structure is assembled, a static water pressure of 1.0 MPa is tested for 30 min, and after no leakage is verified, a photovoltaic cell layer is integrated (a heat-conducting glue is coated on the outer surface of the micro-channel tube array 7, and a photovoltaic cell layer is attached, which can be packaged into an integrated plate structure, realizing synergistic effect of photoelectricity and photothermal).

[0067] Application scenario and energy saving analysis:

[0068] The component structure is particularly suitable for distributed energy systems, and can be expanded through multiple components, such as Figure 4 The parallel mode shown can form a building photovoltaic heating system with a heating area of 50-200m 2 . Actual application tests show that when the component structure is made of 6063 aluminum alloy material, the system weight is reduced by 43% compared with the copper material scheme; under the condition of standard solar intensity of 800W / m 2 , the system photothermal conversion efficiency reaches 58.3%, and the photoelectric conversion efficiency is increased by 12%; in winter heating application, the daily average heating capacity of each square component can reach 3.8kWh.

[0069] Dynamic fluid optimization:

[0070] For example Figure 4As shown, the first manifold 1 and the second manifold 2 adopt a diagonal flow channel design, when the low-temperature working medium enters from the first flow inlet 3, it flows along an S-shaped path through each flow channel of the micro-channel tube array 7, and finally outputs from the second flow outlet 6. This design makes the uniformity index of fluid distribution improve to 0.90 (the ideal state is 1.0), and the pressure drop coefficient is stable in the range of 0.015 MPa / m. The flow characteristics can ensure that the thermal boundary layer thickness is not more than 0.8 mm, which is significantly better than 2.3 mm of the traditional straight-line flow channel.

[0071] Thermal stress compensation mechanism:

[0072] The welding area adopts a corrugated structure, which is composed of continuous wave peaks with a spacing of 0.5-1.2 mm, and the expansion absorption amount satisfies the formula: ΔL=α·L·ΔT: when the expansion coefficient of aluminum material α=23.1×10 -6 / ℃, the pipe length L=2000mm, and the temperature difference ΔT=80℃, the thermal displacement of 3.7mm can be compensated. The actual test shows that the design can withstand 8000 times of thermal cycle without causing weld cracking.

[0073] The parts or structures not specifically described in the utility model can be realized by using the prior art or existing products, and will not be repeated here.

[0074] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A photovoltaic-thermal integrated assembly structure based on an aluminum heat collector, characterized by, The micro-channel heat exchanger comprises two parallel collecting pipes, each of which is provided with an inlet and an outlet, and an array of micro-channel pipes arranged between the two collecting pipes.

2. The photovoltaic-thermal integrated component structure based on aluminum collector according to claim 1, characterized in that, The two collecting pipes are a first collecting pipe and a second collecting pipe, the first collecting pipe is provided with a first inlet and a first outlet at opposite ends, the second collecting pipe is provided with a second inlet and a second outlet at opposite ends, the first inlet and the second outlet are arranged diagonally, and the first outlet and the second inlet are arranged diagonally.

3. The photovoltaic-thermal integrated component structure based on aluminum collector according to claim 2, characterized in that, The first collecting pipe and the second collecting pipe are circular aluminum pipes, and the two ends of the first collecting pipe and the second collecting pipe are flattened into rectangular transition sections matching the welding surfaces of the array of micro-channel pipes.

4. The photovoltaic-thermal integrated component structure based on aluminum collector according to claim 2, characterized in that, The wall thickness of the first collecting pipe and the second collecting pipe is 1.5-2.5 mm.

5. The photovoltaic-thermal integrated component structure based on aluminum collector according to claim 2, characterized in that, The first inlet, the first outlet, the second inlet and the second outlet are respectively provided with a quick connector, and the quick connector is embedded with a high-temperature-resistant fluorine rubber O-ring.

6. The photovoltaic-thermal integrated component structure based on aluminum collector according to claim 5, characterized in that, The quick connector is welded on the first inlet, the first outlet, the second inlet and the second outlet, and the outer wall of the quick connector is provided with anti-skid lines.

7. The photovoltaic-thermal integrated component structure based on aluminum collector according to claim 1, characterized in that, The array of micro-channel pipes has a flat porous structure, and a plurality of flow channels are arranged in parallel inside the array of micro-channel pipes, and opposite ends of each flow channel are connected to the two collecting pipes.

8. The photovoltaic-thermal integrated component structure based on aluminum collector according to claim 1, characterized in that, The collecting pipes and the array of micro-channel pipes are connected by laser welding or brazing, and the welding areas of the two are provided with corrugated structures.

9. The photovoltaic-thermal integrated component structure based on aluminum collector according to claim 1, characterized in that, The outer surface of the array of micro-channel pipes is coated with heat-conducting glue and attached to a photovoltaic cell layer.

10. The photovoltaic-thermal integrated component structure based on aluminum collector according to claim 1, characterized in that, The collecting pipes are connected to an external circulating pump through the inlets and outlets, and then connected to a heat storage device.

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