CN-121984433-A - Static concentrating photovoltaic system and synergistic cover plate assembly

CN121984433ACN 121984433 ACN121984433 ACN 121984433ACN-121984433-A

Abstract

The invention belongs to the technical field of solar photovoltaic power generation, and discloses a static concentrating photovoltaic system and a synergistic cover plate assembly. The system comprises a structural multistage concentrating link assembly, a photothermal split path decoupling structure, a light guide cavity or a light mixing cavity foldback recharging structure and a three-dimensional light receiving structure, so that incident light is converted from planar single-pass light receiving into a light receiving mode of leading the incident light into the three-dimensional light receiving structure after being repeatedly returned, foldback and recycled in a fixed appearance, solar energy utilization is realized from planar to three-dimensional conversion, a light receiving area folding relationship is formed, the light receiving area space utilization rate, the light energy utilization rate and the light receiving uniformity are improved, and thermal recharging is lightened. The system can also integrate the multi-spectrum LED light supplementing assembly with the same cavity, and can provide light supplementing compensation under the condition of weak light. The synergistic cover plate assembly is arranged above the existing planar photovoltaic assembly, and in-situ synergistic transformation is realized through the structural multistage concentrating link assembly, the transparent light-guiding and heat-guiding component, the light mixing cavity, the heat-guiding and heat-guiding structural component and the natural convection heat exchange channel.

Inventors

HU LIANGFENG

Assignees

元丰态科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260410

Claims (16)

1. A static concentrating photovoltaic system is characterized by working under fixed receiving angles and fixed appearance conditions without active mechanical tracking, and comprises a structural multistage concentrating link assembly, a photo-thermal shunt path decoupling structure arranged at the downstream of the structural multistage concentrating link assembly, wherein the photo-thermal shunt path decoupling structure at least comprises an air isolation structure, a light guide cavity or a mixed cavity foldback recharging structure arranged at the downstream of the photo-thermal shunt path decoupling structure, the light guide cavity or the mixed cavity foldback recharging structure comprises a cavity and a reflective foldback boundary, and a three-dimensional light receiving structure arranged in the light guide cavity or the mixed cavity foldback recharging structure, the three-dimensional light receiving structure comprises a photovoltaic light receiving and generating component arranged in the cavity and/or on the inner wall of the cavity, the photovoltaic light receiving and generating component is three-dimensionally arranged along the height direction of the cavity and/or in the space below, and the light guide cavity or the mixed cavity foldback recharging structure is guided into the light guide cavity or the mixed cavity foldback recharging structure through the structural multistage concentrating link assembly and the photo-thermal shunt path decoupling structure, and the light is not absorbed again at the lower side of the reflective light receiving structure.
2. The static concentrating photovoltaic system according to claim 1, wherein the structural multistage concentrating link assembly comprises a transparent upper cover and a linear fresnel lens, and a refractive index guiding micro-scale texture adhesive layer, a variable pitch sawtooth microprism reflective structure, and an inlet optical guide fused silica concentrating head are disposed in the ingress path, and the photothermal split path decoupling structure comprises a dichroic chilled mirror type two-phase selective film layer, a transparent light-guiding heat-conducting member, and a through ventilation heat dissipation structure.
3. The static concentrating photovoltaic system according to claim 1, wherein the light guide cavity or the light mixing cavity foldback recharging structure is in the form of a light mixing cavity photovoltaic integrated subassembly, and the light mixing cavity photovoltaic integrated subassembly comprises a lower guide type fused quartz light guide, a light mixing cavity, an arc-shaped cavity-reflux reconversion piece, an in-cavity reconversion piece, an arc-shaped obliquely downward recharging reflective bottom structural member and a wavy channel reflective bottom structural member, wherein the lower guide type fused quartz light guide introduces guided light into the light mixing cavity, and the arc-shaped cavity-reflux reconversion piece, the in-cavity reconversion piece, the arc-shaped obliquely downward recharging reflective bottom structural member and the wavy channel reflective bottom structural member jointly form the reflective boundary.
4. The static concentrating photovoltaic system according to claim 1, wherein the light guide cavity or the light mixing cavity turn-back recharging structure adopts a light guide cavity photovoltaic integrated sub-assembly, and the light guide cavity photovoltaic integrated sub-assembly comprises a light guide strip light guide core, a light guide strip outer layer protection layer and wavy channel reflection bottom structural members arranged on two sides and/or the bottom of the light guide strip, wherein the light guide strip light guide core transmits the guided light to the three-dimensional light receiving structure along the cavity direction, and the wavy channel reflection bottom structural members reflect the light passing through the photovoltaic light receiving power generation assembly back into the cavity to form multiple re-injection utilization.
5. The static concentrating photovoltaic system according to claim 1, wherein the three-dimensional light receiving structure comprises a middle photovoltaic suspension frame structure and a photovoltaic light receiving and generating assembly arranged on the outer surface of the middle photovoltaic suspension frame structure and/or the inner wall of the cavity, and through ventilation and heat dissipation holes are formed in the middle photovoltaic suspension frame structure so as to form a heat dissipation path penetrating through the middle photovoltaic suspension frame structure, so that heat generated by the photovoltaic light receiving and generating assembly in a light receiving process can be rapidly led out along the path.
6. The static concentrating photovoltaic system according to claim 1, wherein the photovoltaic light-receiving power generation component is a flexible photovoltaic film assembly, the flexible photovoltaic film assembly comprises a surface packaging layer, a low-refractive-index hydrophobic top coating, an ultrathin sub-wavelength micro-nano moth-eye antireflection structure and a photovoltaic light-receiving power generation film layer, and a refraction guiding micro-scale texture bonding layer and an ultrathin sub-wavelength micro-nano moth-eye antireflection structure are arranged on the incident side and/or the back side of the photovoltaic light-receiving power generation film layer.
7. The static concentrating photovoltaic system of claim 6 wherein the photovoltaic light-receiving photovoltaic film layer comprises a transparent electrode, a hole transport layer, a top junction absorber layer, an electron transport layer, a transparent intermediate layer, an optical coupling layer, a front electrode, a window layer, a buffer layer, a long wave absorption enhancement layer, a bottom junction absorber layer, a selective back-reflecting layer, a back electrode, and a virtual edge stripe, wherein the transparent intermediate layer is used to achieve connection and/or isolation between the top junction absorber layer and the bottom junction absorber layer, and the selective back-reflecting layer is used to selectively reflect transmitted light back to the photovoltaic light-receiving photovoltaic film layer.
8. The static concentrating photovoltaic system according to claim 1, further comprising a multi-spectral LED light supplementing assembly disposed at independent light supplementing inlets on both sides of the solar lead-in cavity, wherein in the light supplementing state, the multi-spectral LED light supplementing beads supplement the light flux of the matched spectral band into the light guiding cavity or the light mixing cavity, and in the non-light supplementing state, the LED reflector lamp cup serves as a reflective return boundary.
9. The static concentrator photovoltaic system of claim 1, further comprising a heat sink fin structure, a thermoelectric power module, a pluggable back air intake filter, a heat dissipating fan vent, and a heat dissipating fan, wherein the thermoelectric power module is electrically connected to the heat dissipating fan to drive the heat dissipating fan with heat and/or to enhance ventilation and heat dissipation in an auxiliary power state.
10. A static concentrating photovoltaic system according to claim 3 wherein the inner surface of the curved obliquely downward recharging reflective bottom structure and/or the wavy channel reflective bottom structure is provided with a thermochromic layer or a phase change dimming layer.
11. A synergistic cover plate assembly for in-situ synergistic transformation of an existing planar photovoltaic assembly is characterized by comprising a structural multistage concentrating link assembly arranged above the existing planar photovoltaic assembly, a transparent light-conducting and heat-conducting member arranged at the downstream of the structural multistage concentrating link assembly, a light-mixing cavity arranged below the transparent light-conducting and heat-conducting member, a heat-conducting and heat-conducting structural member arranged in heat conduction fit with the transparent light-conducting and heat-conducting member, and a natural convection heat exchange channel formed between the lower part of the transparent light-conducting and heat-conducting member and the light-receiving surface of the existing planar photovoltaic assembly, wherein an introduced light beam transversely expands through the transparent light-conducting and heat-conducting structural member, reduces local heat peaks, enters the light-mixing cavity and irradiates the existing planar photovoltaic assembly, the heat-conducting and heat-conducting structural member and the natural convection heat exchange channel are matched to disperse and conduct out part of heat, and the reflection boundary is used for returning light which is not absorbed once in the light-mixing cavity and guiding the light back to the light-receiving surface of the existing planar photovoltaic assembly again.
12. The synergistic cover plate assembly as claimed in claim 11, wherein the light mixing cavity is defined by a surrounding area of the reflective bottom structural member below the transparent conductive heat conducting member, a boundary area of a surface of the reflective bottom structural member facing the inner side of the light mixing cavity, and above the light receiving surface of the existing planar photovoltaic assembly, wherein the reflective bottom structural member is configured to press back light rays having a tendency of escaping laterally, and the surface of the reflective bottom structural member facing the inner side of the light mixing cavity is configured to transmit back and lock light rays approaching the upper portion and/or the upper boundary of the light mixing cavity.
13. The synergistic cover plate assembly as claimed in claim 11, wherein the natural convection heat exchange channel has a lower portion provided with a controlled air inlet and an upper portion provided with a controlled air outlet, the controlled air inlet and/or the controlled air outlet are provided with a filter structure and a labyrinth water retaining structure in cooperation, the inlet side of the natural convection heat exchange channel is provided with an air guiding bell mouth, the natural convection heat exchange channel has a vertical height H defined as the distance between the bottom surface of the synergistic cover plate assembly and the light receiving surface of the existing planar photovoltaic assembly.
14. The synergistic cover component assembly as claimed in claim 11, wherein the structural multistage concentrating link assembly comprises a linear fresnel lens, a variable pitch sawtooth microprism reflecting structure and an inlet optical director fused silica concentrating head, the linear fresnel lens outer side and/or the inlet optical director fused silica concentrating head outer layer being covered with a dichroic chilled mirror type two phase selective film layer.
15. The synergistic cover plate assembly as claimed in claim 11, wherein the transparent conductive heat transfer member is a transparent ceramic conductive heat transfer sheet, a fused quartz conductive heat transfer sheet or a quartz glass conductive heat transfer sheet, and the conductive heat transfer structure is an aluminum alloy partial conductive heat sink, a copper conductive heat sink or a graphite based conductive heat transfer structure.
16. The synergistic cover plate component assembly according to claim 12, wherein a plurality of synergistic cover plate component assemblies are arranged in a modularized manner and are arranged in a covering manner along the length direction of the existing planar photovoltaic assembly, the heat conduction and guide structural members are arranged continuously along the length direction of each unit, the natural convection heat exchange channels extend continuously along the length direction, and the boundary area of the surface of the heat conduction and guide structural members facing the inner side of the light mixing cavity extends continuously along the direction of the module array so as to form a continuous reflection return boundary of the upper part and/or the side upper part of the light mixing cavity.

Description

Static concentrating photovoltaic system and synergistic cover plate assembly Technical Field The invention belongs to the technical field of solar photovoltaic power generation, and particularly relates to a static concentrating photovoltaic system working under the conditions of fixed receiving angle and fixed appearance, in particular to a static concentrating photovoltaic system and a synergistic cover plate assembly integrated with multi-stage concentrating light introduction, light guide cavity or light mixing cavity foldback recharging, photo-thermal separation path decoupling, three-dimensional light receiving and light supplementing multiplexing and in-situ synergistic transformation of an existing planar photovoltaic assembly. Background The existing planar photovoltaic assembly generally adopts a planar light receiving and one-time incident utilization mode, the external occupied area of the existing planar photovoltaic assembly basically corresponds to the effective light receiving area, and the effective light receiving area and the power generation capacity in unit volume are difficult to further improve in a fixed installation space. The existing medium-high multiplying power condensation scheme depends on mechanical tracking, the system structure is complex, the maintenance cost is high, and the fixed installation and static application scenes are not facilitated. Under the condition of fixed receiving angle, the existing static light gathering scheme is difficult to simultaneously consider the light gathering light introducing efficiency, outward escaping inhibition and light receiving uniformity, and under the working condition of a large incident angle, the receiving efficiency is easy to be reduced, the outward escaping loss is increased, and the risks of nonuniform irradiation and local hot spots of a light receiving end are easy to occur. Meanwhile, in the conventional static condensing system, incident light is often utilized in a single pass, so that light which is not absorbed once is difficult to be effectively utilized again through returning, turning back and recharging, and a continuous and multiple recycling process is difficult to form in a fixed volume. In addition, the existing light receiving layer structure is mainly suitable for the working conditions of conventional plane incidence and single-pass light receiving, and is difficult to adapt to the incidence conditions of high brightness, multiple directions and multiple foldback, so that the utilization rate of weak absorption wave bands, the foldback reentry utilization rate and the light receiving uniformity are limited. In the aspect of heat management, if an effective heat diversion, heat insulation and heat exchange structure is lacked, heat under the condition of high concentration is easy to recharge to a light receiving end along a main light path and a solid heat conduction path, so that local heat accumulation, working temperature rise and output stability decline are caused. In addition, the light condensation, light supplementing and heat dissipation in the existing system are generally arranged in a scattered manner, and output fluctuation is large under the working conditions of weak light, overcast and rainy, cloudy and early and late, so that an integrated static light condensation scheme capable of achieving in-situ synergistic transformation of a newly built system and an existing planar photovoltaic assembly is lacked. For the synergy reconstruction scene of the existing planar photovoltaic assembly, if higher flux light condensation is directly introduced above the existing planar photovoltaic assembly, local heat peaks and heat recharging are easy to form, continuous and stable power generation is not facilitated, and low-disturbance reconstruction of the existing planar photovoltaic assembly is also not facilitated. The prior art lacks a synergistic cover plate assembly capable of realizing light gathering guide in, heat load split flow, heat dispersion and export and natural convection heat exchange simultaneously on the premise of not disassembling the main body structure of the existing planar photovoltaic assembly. Disclosure of Invention First, the technical problem to be solved The invention aims to solve the following technical problems: 1. The existing planar photovoltaic assembly mainly adopts a planar light receiving and single-pass incident utilization mode, and the effective light receiving area and the power generation capacity in a unit volume are difficult to further improve in a fixed installation space. 2. Under the conditions of fixed receiving angle and fixed appearance, the existing static light gathering scheme has difficulty in simultaneously considering light gathering efficiency, outward escape inhibition, light receiving uniformity and reutilization of light which is not absorbed once. 3. The existing light receiving layer structure is difficult to adapt to the incident condi