CN114593529A - Spectroscopic absorption heat collection components, photovoltaic cogeneration systems and electrical energy storage systems - Google Patents

Abstract

The invention provides a light-splitting absorption and heat collection assembly, a photovoltaic cogeneration system and an electric energy storage system, and relates to the technical field of photovoltaic power generation. The light-splitting absorption heat collection component comprises a heat collection pipe and a light ray collector; the heat collecting pipe comprises a first pipe; the first pipe is externally provided with a heat insulation layer; the light condenser is provided with a light collecting cavity for converging light; the light rays converged by the light collection cavity are absorbed by the spectrum heat-conducting fluid medium, and the light rays which are not absorbed are emitted out of the heat collection tube. The photovoltaic cogeneration system comprises a condenser lens, a photovoltaic cell and a light-splitting absorption heat collection assembly. The electric energy storage system comprises a photovoltaic cogeneration system, a plurality of storage battery packs, an electric quantity monitoring assembly, a heating assembly and a power supply change-over switch. The light-splitting absorption heat collection assembly, the photovoltaic combined heat and power system and the electric energy storage system can generate high-temperature heat energy with higher heat energy quality, so that the comprehensive utilization rate of light energy is improved, and the electric energy utilization rate is improved.

Description

Spectroscopic absorption heat collection components, photovoltaic cogeneration systems and electrical energy storage systems

technical field

The invention relates to the technical field of photovoltaic power generation, in particular, to a spectroscopic absorption heat collecting component, a photovoltaic combined heat and power supply system and an electric energy storage system.

Background technique

Concentrated photovoltaic systems (CPV) technology is a power generation technology that uses optical elements such as lenses or mirrors to concentrate a large area of sunlight on a small area and use the photovoltaic effect to generate electricity. The concentrated sunlight is projected on the solar panel, and high heat will be generated at the focus. On the one hand, heat loss will occur, and on the other hand, the surface temperature of the photovoltaic cell will rise sharply, and the local temperature of the photovoltaic cell will increase, which will cause the photovoltaic cell The photoelectric conversion efficiency is reduced. The output power will increase by 0.2% to 0.5% for every 1K decrease in the temperature of the battery components. And long-term high temperature will cause irreversible damage to photovoltaic cells, thereby reducing the conversion efficiency and affecting the service life. Therefore, a heat exchange cooling system is usually added to the back of the photovoltaic module. The cooling water after heat exchange can usually reach 50℃~70℃. It can also be used for cogeneration to improve the comprehensive energy utilization efficiency. However, the heat exchange method cannot fundamentally Solve the problem that the local temperature is too high, and because the cooling water temperature is not high, its utilization value is not high.

SUMMARY OF THE INVENTION

The first object of the present invention is to provide a spectroscopic absorption heat-collecting assembly to solve the technical problem of low comprehensive energy utilization rate of light in a photovoltaic cogeneration system.

The spectroscopic absorption heat collecting assembly provided by the present invention is applied to a photovoltaic power generation system, and the spectroscopic absorption heat collecting assembly comprises a heat collecting tube and a light concentrator;

The heat collecting tube includes a first tube, the first tube is used for circulating a spectral heat-conducting fluid medium, and the first tube has a first light-transmitting part and a second light-transmitting part that can transmit light; There is a heat preservation layer, the heat preservation layer has a first light transmission hole and a second light transmission hole, the first light transmission hole is arranged in the first light transmission part, and the second light transmission hole is arranged in the first light transmission part. Two light-transmitting parts;

The light concentrator is disposed in the first light-transmitting hole, and has a light-collecting cavity for condensing light;

The light condensed by the light collecting cavity sequentially passes through the first light-transmitting hole and the first light-transmitting portion and enters the first tube and is absorbed by the spectral heat-conducting fluid medium. The light hole is emitted out of the heat collecting tube.

Further, the heat collecting tube further includes a second tube sleeved outside the first tube, the second tube can transmit light, and the gap between the first tube and the second tube is a vacuum layer; the thermal insulation layer is sleeved outside the second pipe.

Further, the second tube is a quartz glass tube;

And/or, there are multiple first light-transmitting holes, and there are multiple corresponding second light-transmitting holes and the light concentrator;

And/or, the first tube is a light-transmitting tube that can transmit light as a whole.

Further, a light rectifier is also included for rectifying the light emitted from the second light-transmitting hole into a light beam suitable for photovoltaic cells to generate electricity.

The beneficial effects brought by the spectroscopic absorption heat collecting assembly of the present invention are:

In the spectroscopic absorption and heat collection assembly provided by the present invention, since the outside of the first tube is provided with an insulating layer, a first light-transmitting hole and a second light-transmitting hole are respectively arranged at the part where the insulating layer needs to transmit light; The light part is located in the first light-transmitting hole, so that the incident light is incident into the first tube, and the spectral heat-conducting fluid medium in the first tube absorbs the corresponding light, which is the non-responsive band light that easily increases the temperature of the component/equipment. At the same time, these light The light cannot make the photovoltaic cells produce the photovoltaic effect (photovoltaic effect) or the photoelectric conversion efficiency is extremely low. The heat generated after the light is directly absorbed is stored by the spectral heat-conducting fluid medium in the first tube. The hole and the second light-transmitting hole are arranged around the outer circumference of the first tube to keep the first tube warm, which greatly reduces the heat loss, thereby obtaining and storing more heat, and generating high temperature with high thermal energy quality. Therefore, the technical problem of low thermal energy quality of the existing photovoltaic photothermal integrated system is solved, and the comprehensive utilization rate of light energy is greatly improved.

The second object of the present invention is to provide a photovoltaic combined heat and power system, comprising a condensing lens, a photovoltaic cell and the above-mentioned light splitting and absorbing heat-collecting assembly, the light collected by the condensing lens is incident on the collecting cavity through the light collecting cavity of the light concentrator. In the first tube of the heat pipe, part of the light is absorbed by the spectral heat-conducting fluid medium in the first tube, and the unabsorbed light is emitted out of the heat collecting tube and then incident on the photovoltaic cell to generate electricity.

Further, the condensing mirror is a condensing reflector, and there are a plurality of them, and each of the condensing mirrors can focus the light point;

And/or, the photovoltaic cell has a plurality.

Further, the condensing reflector is mainly composed of a butterfly-shaped condensing reflector and/or a multiple reflection coupling and transmission system with light collecting performance.

Further, it also includes:

an altitude angle tracking system and an altitude angle adjustment component, the altitude angle tracking system is used for tracking the sun altitude angle, and the altitude angle adjustment component is used for adjusting the altitude angle of the photovoltaic cogeneration system;

And/or, an azimuth tracking system and an azimuth adjustment component, the azimuth tracking system is used for tracking the azimuth of the sun, and the azimuth adjustment component is used for adjusting the azimuth of the photovoltaic cogeneration system.

Further, the azimuth angle adjustment component includes an arc-shaped guide rail, and during the process of adjusting the azimuth angle, the photovoltaic combined heat and power system can move along the arc-shaped guide rail.

Further, a heat exchange cooler is arranged on the back of the photovoltaic cell, and the heat exchange cooler is used to cool down the photovoltaic cell.

The beneficial effects brought by the photovoltaic cogeneration system provided by the present invention are:

In the photovoltaic combined heat and power system provided by the present invention, in the process of photovoltaic power generation, the light is collected by the condensing mirror, and incident to the light collecting cavity, and the light collecting cavity collects the light and enters the first tube through the first light-transmitting hole, and collects the light. The cavity can condense more light, so that the spectral heat-conducting fluid medium in the heat collector can obtain/store more heat. At the same time, the condensed light not only includes the non-responsive band light, but also enables the photovoltaic cell to generate photovoltaics. When the light is focused into the first tube, the collector tube will get more heat, that is, the heat energy quality will be higher. The high temperature heat energy greatly improves the comprehensive utilization rate of light energy. That is, since the photovoltaic cogeneration system includes the above-mentioned spectroscopic heat-absorbing and heat-collecting components, it has all the advantages of the above-mentioned light-splitting, heat-absorbing and heat collecting components, which will not be repeated here.

In the present invention, the non-responsive band light refers to the light corresponding to the wavelength band that cannot produce the photovoltaic effect, mainly including the light with high thermal effect; the responsive band light refers to the light corresponding to the wavelength band that can generate the photovoltaic effect.

The third object of the present invention is to provide an electrical energy storage system, including the above photovoltaic cogeneration system;

It also includes a number of battery packs, power monitoring components, heating components and power supply switching switches, the battery packs are used to store the electrical energy generated by the photovoltaic power generation system, the power monitoring components are used to monitor the power of the battery packs, so The heating assembly is used to heat the heat collecting tube, and the power supply switch is used to switch the power supply direction;

When the power monitoring component detects that the battery pack is fully charged, the power supply direction is switched to the heating component or the city grid through the power supply switch.

The beneficial effects brought by the electric energy storage system provided by the present invention are:

Since the power generation energy storage system provided by the present invention includes the above photovoltaic cogeneration system, it has all the advantages of the above photovoltaic cogeneration system, that is, it can generate high-temperature heat energy with higher thermal energy quality, and greatly improves the energy synthesis of light. In addition, when the battery pack is fully charged, the electrical energy generated by the above photovoltaic power generation system is stored in the battery pack. When the battery pack is fully charged, the power supply direction is switched to Heating components, so that the heating components can heat the butt heat pipe, or switch the power supply direction to the city grid, so as to make full use of the natural resource solar energy and improve the utilization rate of electric energy.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

1 is a schematic diagram of a spectroscopic absorption heat collecting assembly and a photovoltaic cogeneration system provided by an embodiment of the present invention;

FIG. 2 is a schematic side view of the heat collecting tube part in FIG. 1;

3 is a schematic three-dimensional schematic diagram of the spectroscopic absorption heat collection assembly and the photovoltaic cogeneration system provided in the embodiment of the present invention in FIG. 1 , wherein the photovoltaic cell is not shown;

FIG. 4 is a schematic top view of FIG. 3 , which shows the track (arc guide rail) and its approximate position/connection relationship (principle) with each group of condenser mirrors, heat collecting tubes, and heat collecting mother tubes.

Description of reference numbers:

100 - collector tube;

110 - first tube;

120-spectral heat transfer fluid medium;

130-insulation layer; 131-first light-transmitting hole; 132-second light-transmitting hole;

140 - the second tube;

150 - vacuum layer;

160 - heat collector main tube;

200 - light concentrator;

300 - light rectifier;

400 - condenser lens;

500 - photovoltaic cells;

600 - heat exchange cooler;

700 - Curved rails.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Embodiments of the present invention provide a spectroscopic absorption heat collection component, a photovoltaic cogeneration system, and an electrical energy storage system, with reference to FIGS. 1 to 4 , the details are as follows.

The spectroscopic absorption heat collecting assembly provided by the embodiment of the present invention is applied to a photovoltaic power generation system. As shown in FIG. 1 and FIG.

The heat collecting tube 100 includes a first tube 110, the first tube 110 is used for circulating the spectral heat-conducting fluid medium 120, and the first tube 110 has a first light-transmitting part and a second light-transmitting part that can transmit light; The heat preservation layer 130 has a first light transmission hole 131 and a second light transmission hole 132. The first light transmission hole 131 is provided in the first light transmission part, and the second light transmission hole 132 is provided in the second light transmission part.

The light concentrator 200 is disposed in the first light-transmitting hole 131 and has a light-collecting cavity for condensing light.

The light collected by the light collecting cavity sequentially passes through the first light-transmitting hole 131 and the first light-transmitting portion and enters the first tube 110 and is absorbed by the spectral heat-conducting fluid medium 120. The unabsorbed light passes through the second light-transmitting portion, the The two light-transmitting holes 132 project out of the heat collecting tube 100 .

In the embodiment of the present invention, since the outside of the first tube 110 of the spectroscopic absorption and heat collection assembly has a heat insulating layer 130, light-transmitting holes are provided at the parts of the heat-insulating layer 130 that need to transmit light, which are the first light-transmitting hole 131 and the second light-transmitting hole, respectively. The light hole 132, the first light transmission hole 131 is used for passing the incident light, and the second light transmission hole 132 is used for passing the outgoing light; the first light transmission part of the first tube 110 is located in the first light transmission hole 131, which is used for light transmission , the incident light is incident into the first tube 110, and the spectral heat-conducting fluid medium 120 in the first tube 110 absorbs the corresponding light, which is the non-responsive band light (for example, far-infrared light, Ultraviolet light, etc.), at the same time, these light rays cannot make the photovoltaic cell 500 produce the photovoltaic effect (photovoltaic effect) or the photoelectric conversion efficiency is extremely low, and the heat generated after the light is directly absorbed is absorbed by the spectral heat transfer fluid in the first tube 110. The medium 120 is stored, because the insulation layer 130 is surrounded by the outer circumference of the first tube 110 except for the first light-transmitting hole 131 and the second light-transmitting hole 132, so as to keep the first tube 110 warm, which greatly reduces the heat. In order to obtain and store more heat, high-temperature thermal energy with higher thermal energy quality is generated, thereby solving the technical problem of low thermal energy quality of the existing photovoltaic photothermal integrated system. On the other hand, in the process of photovoltaic power generation, since the heat collector tube 100 absorbs the light of the non-response band, the heat collector tube 100 acts as a filter for absorbing light with a high thermal effect, that is, pre-filters the light of the non-response band (by spectral heat conduction). The fluid medium 120 absorbs the light of the non-responsive wavelength band from the second light-transmitting hole 132, thereby reducing or even avoiding the non-responsive wavelength light incident on the photovoltaic cell 500, and only passing the light of the responding wavelength band that can produce the photovoltaic effect (for example, , visible light, etc.), and irradiate the photovoltaic cell 500 to generate electricity. Compared with the existing photovoltaic cell 500 system, it is obvious that the spectroscopic absorption and heat collection assembly provided by the embodiment of the present invention reduces the amount of heat incident on the photovoltaic cell 500. The temperature of the photovoltaic cell 500 is lowered, and the problems of low device efficiency and short lifespan of the photovoltaic cell 500 due to local high temperature are solved.

In the embodiment of the present invention, the light collecting cavity of the light concentrator 200 condenses the light and enters the first tube 110 through the first light-transmitting hole 131 . The heat-conducting fluid medium 120 obtains/stores more heat, and at the same time, the converged light includes not only the non-response band light, but also the response band light that can make the photovoltaic cell 500 generate the photovoltaic effect, and the more these response band light light, the conversion rate of the photovoltaic cell 500 is improved; when the light is focused into the first tube 110, the heat collector tube 100 will obtain more heat, that is, high-temperature heat energy with higher heat energy quality is generated, which greatly improves the light comprehensive energy utilization rate and system exergy efficiency.

In the embodiment of the present invention, as shown in FIG. 1 and FIG. 2 , the heat collecting tube 100 further includes a second tube 140 sleeved outside the first tube 110 , the second tube 140 can transmit light, and the first tube 110 and the second tube 140 The gap between the tubes 140 is a vacuum layer; the insulation layer 130 is sleeved outside the second tube 140 . The arrangement of the vacuum layer can further keep the heat stored in the first tube 110 warm, and further ensure high-temperature heat with high thermal energy quality.

Specifically, in the embodiment of the present invention, the second tube 140 is a quartz glass tube, which can not only have a certain degree of vacuum in the gap between the second tube 140 and the first tube 110 , but also effectively transmit light.

There are a plurality of first light-transmitting holes 131 , and a plurality of corresponding second light-transmitting holes 132 and light concentrators 200 are provided. In this way, when a photovoltaic power generation system is set, it can be set as a distributed photovoltaic power generation system, and centralized heat collection.

In the embodiment of the present invention, the first tube 110 is a light-transmitting tube that can transmit light as a whole.

In the embodiment of the present invention, as shown in FIG. 1 , a light rectifier 300 is further included for rectifying the light emitted from the second light-transmitting hole 132 into a light beam suitable for the photovoltaic cell 500 to generate electricity. Specifically, the light rectifier 300 includes an optical integrator. The optical integrator is arranged between the light focus and the photovoltaic cell. The condensed light is rectified into a light beam required by the photovoltaic cell 500 , eg, parallel light that is vertically incident on the photovoltaic cell 500 . It should be noted that the optical integrator can also be replaced by a single-sided or double-sided convex lens, which is not limited here, as long as the light can be rectified into a suitable light beam, it is within the scope of protection claimed by the present invention.

Of course, the light rectifier 300 may also include a concave lens, and the purpose of the concave lens is also to rectify the light into the light beam required by the photovoltaic cell 500 . The concave lens can be concave on one side or concave on both sides, which is not limited here, as long as the light can be rectified into a suitable light beam, it is within the scope of protection required by the present invention; at this time, the focus of the light is located between the concave lens and the Between the photovoltaic cells, the concave lens is disposed near the second light-transmitting hole 132 to rectify the condensed light emitted by the second light-transmitting hole 132 into a light beam required by the photovoltaic cell 500 , Parallel light.

The photovoltaic cogeneration system provided by the embodiment of the present invention includes: as shown in FIG. 1 to FIG. 4 , a condensing mirror 400 , a photovoltaic cell 500 and the above-mentioned spectroscopic absorption and heat collecting components, the light collected by the condensing mirror 400 passes through the light collected by the light concentrator 200 . The optical cavity is incident into the first tube 110 of the heat collector tube 100 , part of the light is absorbed by the spectral heat transfer fluid medium 120 in the first tube 110 , and the unabsorbed light exits the heat collector tube 100 and then enters the photovoltaic cell 500 to generate electricity.

In the photovoltaic cogeneration system provided by this embodiment of the present invention, in the process of photovoltaic power generation, the light can be collected by the condensing mirror 400 and incident on the light collecting cavity, and the light collecting cavity will collect the light and enter the second light through the first light-transmitting hole 131. In a tube 110, the light collecting cavity can collect more light, so that the spectral heat conducting fluid medium 120 in the heat collecting tube 100 can obtain/store more heat. At the same time, the collected light not only includes non-responsive band light, but also It includes light in the response wavelength band that can make the photovoltaic cell 500 generate a photovoltaic effect. The more light in these response wavelength bands, the higher the conversion rate of the photovoltaic cell 500; when the light is focused into the first tube 110, the heat collector tube 100 More heat will be obtained, ie, high temperature thermal energy of higher thermal energy quality will be generated. That is, since the photovoltaic cogeneration system includes the above-mentioned spectroscopic heat-absorbing and heat-collecting components, it has all the advantages of the above-mentioned light-splitting, heat-absorbing and heat collecting components, which will not be repeated here.

In the prior art, in order to reduce the non-response band light directly incident on the photovoltaic cell 500, a structure of setting a beam splitter is usually adopted, and most of the adopted solutions are to install a reflective film to reflect the non-response band light to the heat absorbing component to absorb heat. , which can make the photovoltaic cell 500 generate the photoelectric effect of the response band light incident on the photovoltaic cell 500. In the photovoltaic power generation system of this structure, the heat absorbing component only has the function of absorbing heat and has no other functions. It is complex, requires high precision, and has high production costs. In addition, due to the high cost of the reflective film, the cost of the entire power generation system is further increased. It can be seen that the photovoltaic power generation system in the prior art is not only complex in structure, but also in function. limited and expensive.

In the embodiment of the present invention, when the first light-transmitting part and/or the second light-transmitting part of the first tube 110 is a convex surface, at this time, the structures formed by the first tube 110 and the spectral heat-conducting fluid medium 120 in the first tube 110 are similar In the convex lens structure, when the light passes through the first tube 110 and the spectral heat-conducting fluid medium 120 in it, it is equivalent to passing through the convex lens, that is, the heat collecting tube 100 has the function of condensing light, so it can improve the light convergence multiple, and then Improve power generation efficiency. That is to say, the heat collector tube 100 can not only improve the heat storage efficiency, but also can concentrate light to improve the power generation efficiency. This arrangement can ensure or even improve the photovoltaic power generation efficiency, improve high-quality heat energy, and simplify the operation of the entire photovoltaic power generation system. In the embodiment of the present invention, since the heat collecting tube 100 can directly absorb the light of the non-responsive wavelength band, there is no need to specially install a beam splitter and an expensive reflective film, and the cost is further reduced; in addition, when the first tube and its inner When the photovoltaic heat-conducting fluid medium has the function of concentrating light, a higher concentration of light can be obtained, thereby reducing the design size of the photovoltaic cell, thereby reducing the manufacturing cost of the photovoltaic cell. The photovoltaic cogeneration system has the advantages of simple structure, multiple functions, high power generation rate (photoelectric conversion rate) and low cost.

In the embodiment of the present invention, the spectral heat-conducting fluid medium is selected from a fluid composed of an organic working medium or molten salt that has a selective absorption function for spectrum, such as heat-conducting oil, silicone oil, CoCl2, CoSO4, CuSO4, etc. Specifically, the first tube 110 can be a circular tube or an elliptical tube with a cross-sectional shape. Of course, a tube with a rectangular cross-sectional shape and an optical integrator/concave lens/convex lens with optical path adjustment function can also be used. In the circuit assembly, the spectral heat transfer fluid medium flows and exchanges heat in the first tube 110 .

In this embodiment of the present invention, the photovoltaic cell 500 may be any cell that can absorb solar energy to generate photovoltaic effect (photoelectric effect) power generation, including: crystalline silicon cells, amorphous silicon cells, perovskite cells, and gallium arsenide cells Wait.

Specifically, in the embodiment of the present invention, as shown in FIG. 3 , the condensing mirrors 400 are multiple condensing mirrors, and each condensing mirror 400 can focus light points; the photovoltaic cells 500 have multiples. In this embodiment, one condenser lens 400 corresponds to a group of light-transmitting holes (defined here as: a group of light-transmitting holes is a first light-transmitting hole 131 and a corresponding second light-transmitting hole 132 ), a The photovoltaic cell 500, for example, is set in this way to realize distributed power generation and centralized heat collection, that is, the light converged by each condensing mirror 400 passes through the heat collecting tube 100 through the matching light-transmitting hole and then enters the corresponding corresponding heat collection tube 100. The photovoltaic cells 500 generate electricity separately, thereby realizing distributed power generation. The photovoltaic cells 500 can be arranged in series, and of course, they can also be arranged in parallel. The arrangement is flexible and diverse and has strong adaptability. To achieve centralized heat collection, it is easy to generate high-quality high-temperature heat energy. Compared with the conventional low-parameter high-magnification concentrating photovoltaic solar-thermal integrated system, the exergy efficiency of the system can be improved by more than 10%.

It should be noted that in addition to the above specific examples, other matching methods can also be used, for example, multiple condensing lenses 400 correspond to the same group of light-transmitting holes, multiple groups of light-transmitting holes correspond to the same photovoltaic cell 500, etc. limited. When multiple groups of light-transmitting holes correspond to the same photovoltaic cell 500 , since the same photovoltaic cell 500 can obtain more light that enables the photovoltaic cell 500 to generate photoelectric effect, the photoelectric conversion rate can be improved, the power generation efficiency can be improved, and the reduction of Manufacturing cost of photovoltaic cell 500 .

In the embodiment of the present invention, the condensing reflector is mainly composed of a butterfly condensing reflector with light concentrating performance, or mainly composed of a multiple reflection coupling and transmission system, or mainly a butterfly condensing reflector and a multiple reflection coupling and transmission system The composition, which is not specifically limited, is within the scope of protection of the present invention. For example, the condenser mirror can be a hyperbolic trough, a hyperbolic dish, a reflective focusing device or a combined system. Besides, the condenser lens 400 can also adopt a transmission focusing system with light-condensing performance, such as a Fresnel lens and any other type of transmission focusing device or combination system.

In the embodiment of the present invention, an altitude angle tracking system and an altitude angle adjustment component are further included. The altitude angle tracking system is used to track the sun altitude angle, and the altitude angle adjustment component is used to adjust the altitude angle of the photovoltaic combined heat and power system, so that the sun's rays can be exhausted. It may be vertically incident to the photovoltaic cell 500 to ensure the power generation efficiency of the photovoltaic cell 500 .

In the embodiment of the present invention, an azimuth angle tracking system and an azimuth angle adjustment component are further included. The azimuth angle tracking system is used to track the azimuth angle of the sun, and the azimuth angle adjustment component is used to adjust the azimuth angle of the photovoltaic combined heat and power system, so that the sun's rays are exhausted. It may be vertically incident to the photovoltaic cell 500 to ensure the power generation efficiency of the photovoltaic cell 500 . Specifically, in the embodiment of the present invention, as shown in FIG. 4 , the azimuth angle adjustment component includes an arc guide rail 700 . During the process of adjusting the azimuth angle, the photovoltaic cogeneration system can move along the arc guide rail 700 .

In the embodiment of the present invention, when the photovoltaic cogeneration system simultaneously includes: an altitude angle tracking system, an altitude angle adjustment component, an azimuth angle tracking system, and an azimuth angle adjustment component, dual-axis tracking can be realized. For example, each point focusing mirror has Independent altitude angle tracking device and height angle adjustment device, but have common azimuth angle tracking device and azimuth angle adjustment device; Have a common height angle tracking device and height angle adjustment device.

In the embodiment of the present invention, as shown in FIG. 1 , a heat exchange cooler 600 is disposed on the back of the photovoltaic cell 500 , and the heat exchange cooler 600 is used to cool down the photovoltaic cell 500 . Specifically, the heat exchange cooler 600 may be a heat exchange device of a tube bundle type, a fin type, a printed circuit board type, or the like. The setting 600 of the heat exchange cooler can effectively reduce the temperature of the photovoltaic cell, thereby improving the power generation efficiency of the photovoltaic cell and prolonging the life of the photovoltaic cell.

To sum up, the spectroscopic absorption heat collection assembly and the photovoltaic cogeneration system provided by the embodiment of the present invention utilizes the spectroscopic technology and adopts the series point focusing system for distributed power generation and centralized heat collection. The system has the following advantages:

①Adopt absorption spectroscopy technology to realize the independent operation of thermal energy and electrical energy, avoid the problem of efficiency reduction and damage caused by the heating of photovoltaic modules by non-response band light, and also avoid the difficulty of improving the heat collection parameters due to the temperature limitation of the modules. question;

②The design of point-focusing series reduces the equipment investment of the tracking system. The tracking system of the multi-point focus-reflection system can be used for public use. At the same time, the pipes of the heat collection system can be collected by connecting pipes. As shown in Figure 4, each heat collection pipe can be The heat of 100 is concentrated in the heat collecting main tube 160, which makes the whole heat collecting system have the function of high parameter heat collecting, and reduces the investment of the heat collecting system;

③Using the point-focusing heating mode, the non-heat collecting section can be insulated by the insulation layer 130, which greatly reduces the heat dissipation loss of the entire photovoltaic power generation system.

The electrical energy storage system provided by the embodiment of the present invention includes the above-mentioned photovoltaic cogeneration system, and several battery packs, power monitoring components, heating components, and power supply switching switches. The battery packs are used to store the electrical energy generated by the photovoltaic power generation system, The power monitoring component is used to monitor the power of the battery pack, the heating component is used to heat the collector tube 100, and the power supply switch is used to switch the power supply direction; when the power monitoring component detects that the battery pack is fully charged, the power supply switch is used to supply power. Change direction to heating unit or mains.

The power generation energy storage system provided by the embodiment of the present invention includes the above photovoltaic cogeneration system, so it has all the advantages of the above photovoltaic cogeneration system, that is, it can generate high-temperature thermal energy with higher thermal energy quality, and greatly improves the optical efficiency. The comprehensive utilization rate of energy will not be described in detail. In addition, when the battery pack is fully charged, the electrical energy generated by the above photovoltaic power generation system is stored in the battery pack. When the battery pack is fully charged, the power supply direction is switched by the power supply switch. Switch to the heating element, so that the heating element can heat the heat pipe, or switch the power supply direction to the city grid, so as to make full use of the natural resource solar energy and improve the electricity utilization rate.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be based on the scope defined by the claims.

Finally, it should also be noted that in this document, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply these entities or there is any such actual relationship or sequence between operations. Moreover, the term "comprising" or any other variation thereof is intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not expressly listed, Or also include elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

In the above-mentioned embodiments, the descriptions of orientations such as "left" and "right" are all based on what is shown in the accompanying drawings.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The light-splitting absorption heat collection assembly is applied to a photovoltaic power generation system and comprises a heat collection tube (100) and a light concentrator (200);

the heat collecting tube (100) comprises a first tube (110), the first tube (110) is used for circulating a spectrum heat conducting fluid medium (120), and the first tube (110) is provided with a first light-transmitting part and a second light-transmitting part which can transmit light; the first tube (110) is externally provided with an insulating layer (130), the insulating layer (130) is provided with a first light transmission hole (131) and a second light transmission hole (132), the first light transmission hole (131) is arranged at the first light transmission part, and the second light transmission hole (132) is arranged at the second light transmission part;

the light collector (200) is arranged in the first light-transmitting hole (131) and is provided with a light collecting cavity for collecting light;

the light converged by the light collection cavity sequentially passes through the first light transmission hole (131) and the first light transmission part, enters the first tube (110), is absorbed by the spectrum heat conduction fluid medium (120), and the unabsorbed light sequentially passes through the second light transmission part and the second light transmission hole (132) and is emitted out of the heat collection tube (100).

2. A spectral absorption and collection thermal assembly according to claim 1, wherein the thermal collection tube (100) further comprises a second tube (140) sleeved outside the first tube (110), the second tube (140) is transparent to light, and a gap between the first tube (110) and the second tube (140) is a vacuum layer (150); the insulating layer (130) is sleeved outside the second pipe (140).

3. A spectral absorption heat-collecting assembly according to claim 2, wherein the second tube (140) is a quartz glass tube;

and/or the first light-transmitting hole (131) is provided with a plurality, and the corresponding second light-transmitting hole (132) and the light concentrator (200) are provided with a plurality;

and/or the first tube (110) is a light-transmitting tube which can transmit light on the whole.

4. A spectral absorption heat collecting assembly according to any one of claims 1-3, further comprising a light rectifier (300) for rectifying light emitted from said second light transmitting hole (132) into a light beam suitable for photovoltaic cell power generation.

5. A combined photovoltaic and thermal power generation system, characterized by comprising a condenser (400), a photovoltaic cell (500) and the spectral absorption heat collecting assembly of any one of claims 1 to 4, wherein light collected by the condenser (400) is incident into the first tube (110) of the heat collecting tube (100) through the light collecting cavity of the light collector (200), part of the light is absorbed by the spectral heat transfer fluid medium (120) in the first tube (110), and unabsorbed light is emitted out of the heat collecting tube (100) and then incident into the photovoltaic cell (500) to generate electricity.

6. The photovoltaic cogeneration system according to claim 5, wherein said condenser (400) is a plurality of condenser mirrors, each of said condenser mirrors (400) being capable of focusing a point of light;

and/or the photovoltaic cell (500) has a plurality.

7. The photovoltaic cogeneration system of claim 6, wherein said concentrating mirror consists essentially of a butterfly concentrating mirror and/or a multiple reflection coupled transmission system having concentrating properties.

8. The photovoltaic cogeneration system according to any one of claims 5 to 7, further comprising:

the solar photovoltaic combined heat and power generation system comprises an altitude tracking system and an altitude adjusting assembly, wherein the altitude tracking system is used for tracking the altitude of the sun, and the altitude adjusting assembly is used for adjusting the altitude of the photovoltaic combined heat and power system;

and/or the azimuth tracking system is used for tracking the azimuth of the sun, and the azimuth adjusting assembly is used for adjusting the azimuth of the photovoltaic cogeneration system.

9. The pv cogeneration system of claim 8, wherein said azimuth angle adjustment assembly comprises an arcuate guide along which said pv cogeneration system can move during azimuth angle adjustment (700);

and/or, the back of photovoltaic cell is provided with heat transfer cooler (600), heat transfer cooler (600) are used for right photovoltaic cell (500) cools down.

10. An electrical energy storage system comprising the photovoltaic cogeneration system of any one of claims 5-9;

the photovoltaic power generation system is characterized by further comprising a plurality of storage battery packs, an electric quantity monitoring assembly, a heating assembly and a power supply changeover switch, wherein the storage battery packs are used for storing electric energy generated by the photovoltaic power generation system, the electric quantity monitoring assembly is used for monitoring the electric quantity of the storage battery packs, the heating assembly is used for heating the heat collecting pipes (100), and the power supply changeover switch is used for switching the power supply direction;

when the electric quantity monitoring assembly monitors the full electric quantity of the storage battery pack, the power supply direction is switched to the heating assembly or the commercial power grid through the power supply change-over switch.

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