WO2023216617A1

WO2023216617A1 - Light splitting, absorbing and heat collecting assembly, photovoltaic combined heat and power supply system, and electric energy storage system

Info

Publication number: WO2023216617A1
Application number: PCT/CN2022/142737
Authority: WO
Inventors: 韩伟; 付康丽; 于在松; 赵亮; 陆续; 左芳菲; 姚明宇; 宋晓辉; 姬海民; 杨路
Original assignee: 西安热工研究院有限公司
Priority date: 2022-05-07
Filing date: 2022-12-28
Publication date: 2023-11-16
Also published as: CN114593529A

Abstract

The present invention relates to the technical field of photovoltaic power generation, and provides a light splitting, absorbing and heat collecting assembly, a photovoltaic combined heat and power supply system, and an electric energy storage system. The light splitting, absorbing and heat collecting assembly comprises a heat collecting pipe and a light converging device; the heat collecting pipe comprises a first pipe; a heat insulation layer is provided outside the first pipe; the light converging device comprises a light collecting cavity for converging light; light converged by the light collecting cavity is absorbed by a spectrum heat-conducting fluid medium, and light which is not absorbed is emitted out of the heat collecting pipe. The photovoltaic combined heat and power supply system comprises a converging lens, a photovoltaic cell, and the light splitting, absorbing and heat collecting assembly. The electric energy storage system comprises the photovoltaic combined heat and power supply system, a plurality of storage battery packs, an electric quantity monitoring assembly, a heating assembly, and a power supply change-over switch. According to the present invention, high-temperature heat energy having higher heat energy quality can be generated, the comprehensive utilization rate of light energy is increased, and the utilization rate of electric energy is increased.

Description

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

Technical field

The present disclosure relates to the technical field of photovoltaic power generation, and specifically to a spectroscopic absorption and heat collection component, a photovoltaic cogeneration 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 utilize the photovoltaic effect to generate electricity. The concentrated sunlight is projected on the solar panel, and a high amount of heat will be generated at the focus. On the one hand, it will cause heat loss, and on the other hand, the surface temperature of the photovoltaic cell will rise sharply. The local temperature of the photovoltaic cell will rise, which will cause the photovoltaic cell to The photoelectric conversion efficiency is reduced. For every 1K decrease in battery component temperature, the output power will increase by 0.2% to 0.5%. And long-term high temperature will cause irreversible damage to photovoltaic cells, thereby reducing conversion efficiency and affecting 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 combined heat and power generation to improve the overall energy utilization efficiency. However, the heat exchange method cannot fundamentally improve the overall energy utilization efficiency. Solve the problem of excessive local temperature, and because the cooling water temperature is not high, its utilization value is not high.

Contents of the invention

The first purpose of the present disclosure is to provide a light-splitting absorption and heat collection component to solve the technical problem of low comprehensive energy utilization of light in a photovoltaic cogeneration system.

The spectroscopic absorption and heat collection component provided by the present disclosure is used in photovoltaic power generation systems. The spectroscopic absorption and heat collection component includes a heat collecting tube and a light concentrator;

The heat collecting tube includes a first tube, the first tube is used to circulate a spectral heat transfer fluid medium, and the first tube has a first light-transmitting part and a second light-transmitting part capable of transmitting light; the outer surface of the first tube It has a thermal insulation layer, the thermal insulation layer has a first light-transmitting hole and a second light-transmitting hole, the first light-transmitting hole is arranged on the first light-transmitting part, and the second light-transmitting hole is arranged on the first light-transmitting part. 2. Translucent part;

The light concentrator is arranged in the first light-transmitting hole and has a light-collecting cavity for converging light;

The light collected by the light collecting cavity is incident into the first tube through the first light-transmitting hole and the first light-transmitting part in sequence and is absorbed by the spectral heat-conducting fluid medium. The unabsorbed light passes through the second light-transmitting part and the second light-transmitting part in sequence. The light hole projects out of the heat collecting tube.

Further, the heat collecting tube further includes a second tube placed 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 insulation layer is set outside the second tube.

Further, the second tube is a quartz glass tube;

And/or, there are multiple first light-transmitting holes, and correspondingly there are multiple 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.

Furthermore, a light rectifier is included for rectifying the light emitted from the second light-transmitting hole into a light beam suitable for photovoltaic cell power generation.

The beneficial effects brought by the disclosed light absorption and heat collection assembly are:

In the spectroscopic absorption and heat collection assembly provided by the present disclosure, since the outside of the first tube has an insulation layer, first and second light-transmitting holes are provided at the parts of the insulation layer that need to be light-transmissive; the first light-transmitting hole of the first tube is The light part is located in the first light-transmitting hole, so that the incident light is incident into the first tube. The spectral heat-conducting fluid medium in the first tube absorbs the corresponding light. These lights are non-responsive band lights that easily increase the temperature of the component/equipment. At the same time, these The light cannot cause the photovoltaic cell to 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. Since the insulation layer is in addition to the first light-transmitting hole and the second light-transmitting hole, and other parts are arranged around the outer periphery of the first tube to insulate the first tube, greatly reducing heat loss, thereby obtaining and storing more heat, and generating high temperature with higher thermal energy quality. thermal energy, thereby solving the technical problem of low thermal energy quality in existing photovoltaic and thermal integrated systems, and greatly improving the comprehensive utilization rate of light energy.

The second object of the present disclosure is to provide a photovoltaic cogeneration system, which includes a condenser mirror, a photovoltaic cell and the above-mentioned light absorption and heat collection component. The light collected by the condenser mirror is incident on the collector through the light collector cavity of the light collector. 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 outside the heat collecting tube and then incident on the photovoltaic cell to generate electricity.

Further, the condenser mirror is a condenser mirror, and there are multiple condenser mirrors, and each condenser mirror can focus the light point;

And/or, there are multiple photovoltaic cells.

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

Furthermore, it also includes:

An altitude angle tracking system and an altitude angle adjustment component. The altitude angle tracking system is used to track the sun's altitude angle, and the altitude angle adjustment component is used to adjust the altitude angle of the photovoltaic combined heat and power system;

And/or, an azimuth angle tracking system and an azimuth angle adjustment component, the azimuth angle tracking system is used to track the sun's azimuth angle, and the azimuth angle adjustment component is used to adjust the azimuth angle of the photovoltaic combined heat and power system.

Further, the azimuth angle adjustment assembly 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 provided on the back of the photovoltaic cell, and the heat exchange cooler is used to cool the photovoltaic cell.

The beneficial effects brought by the photovoltaic cogeneration system provided by this disclosure are:

In the photovoltaic combined heat and power system provided by the present disclosure, during the photovoltaic power generation process, light is condensed through a condenser and incident on the light collecting cavity. The light collecting cavity condenses the light and is incident on the first tube through the first light-transmitting hole to collect the light. The cavity can condense more light, thereby allowing the spectral heat-conducting fluid medium in the heat collecting tube to obtain/store more heat. At the same time, the condensed light not only includes non-responsive band light, but also includes photovoltaic cells that can produce photovoltaic energy. The response band light of the effect, the more these response band light, the conversion rate of the photovoltaic cell will increase; when the light is focused into the first tube, the heat collecting tube will get more heat, that is, the heat energy generated will be of higher quality. 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 spectral absorption and heat collection component, it has all the advantages of the above-mentioned spectral absorption and heat collection component, which will not be described again here.

In this disclosure, the non-responsive band light refers to the light corresponding to the wave band that cannot produce photovoltaic effect, mainly including the light with high thermal effect; the responsive band light refers to the light corresponding to the wave band that can produce photovoltaic effect.

The third object of the present disclosure is to provide an electric energy storage system, including the above-mentioned photovoltaic combined heat and power system;

It also includes a number of battery packs, a power monitoring component, a heating component and a power supply switch. The battery pack is used to store the electric 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 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 disclosure are:

The power generation energy storage system provided by the present disclosure includes the above-mentioned photovoltaic cogeneration system, so it has all the advantages of the above-mentioned photovoltaic cogeneration system, that is, it can generate high-temperature thermal energy with higher thermal energy quality, which greatly improves the comprehensive energy of light. The utilization rate will not be described in details; in addition, when the battery pack is fully charged, the electric energy generated by the above-mentioned 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 component, so that the heating component can be connected to the heat pipe for heating, or the power supply direction can be switched to the municipal power grid, so as to make full use of natural resource solar energy and improve the utilization rate of electric energy.

Description of the drawings

In order to explain the embodiments of the present disclosure or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only This is an embodiment of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without exerting creative efforts.

Figure 1 is a schematic diagram of a spectroscopic absorption heat collection component and a photovoltaic cogeneration system provided by an embodiment of the present disclosure;

Figure 2 is a schematic side view of the heat collecting tube in Figure 1;

Figure 3 is a three-dimensional schematic diagram of the spectroscopic absorption heat collection component and the photovoltaic cogeneration system provided in Figure 1 according to an embodiment of the present disclosure, in which the photovoltaic cells are not shown;

Figure 4 is a top view of Figure 3 showing the track.

Explanation of reference symbols:

100 - collector tube;

110-first tube;

120-Spectral thermal conductive fluid medium;

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

140-Second tube;

150-vacuum layer;

160-heat collector tube;

200-Light concentrator;

300-Light rectifier;

400-Condenser;

500-Photovoltaic cells;

600-Heat exchange cooler;

700-Arc guide rail.

Detailed ways

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

Embodiments of the present disclosure provide a spectroscopic absorption and heat collection component, a photovoltaic cogeneration system, and an electric energy storage system. Refer to Figures 1 to 4, and the details are as follows.

The spectral absorption and heat collection component provided by the embodiment of the present disclosure is applied to a photovoltaic power generation system. As shown in Figures 1 and 2, the spectral absorption and heat collection component includes a heat collector tube 100 and a light concentrator 200.

The heat collecting tube includes a first tube 110. The first tube 110 is used to circulate the spectral heat transfer 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 first tube 110 has a heat preservation device outside. Layer 130, the insulation layer 130 has a first light-transmitting hole 131 and a second light-transmitting hole 132. The first light-transmitting hole 131 is provided in the first light-transmitting part, and the second light-transmitting hole 132 is provided in the second light-transmitting 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 collection cavity passes through the first light-transmitting hole 131 and the first light-transmitting part in sequence and is incident into the first tube 110 and is absorbed by the spectral heat-conducting fluid medium 120. The unabsorbed light passes through the second light-transmitting part and the first light-transmitting part in sequence. Two light-transmitting holes 132 project out of the heat collecting tube.

In the embodiment of the present disclosure, since the first tube 110 of the spectroscopic absorption and heat collection assembly has an insulation layer 130 on the outside, light-transmitting holes are provided in the parts of the insulation layer 130 that need to be light-transmissive, namely the first light-transmitting hole 131 and the second light-transmitting hole 131 . Light hole 132, the first light transmission hole 131 is used to pass incident light, and the second light transmission hole 132 is used to pass outgoing light; the first light transmission part of the first tube 110 is located in the first light transmission hole 131, used to transmit light , 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 non-responsive band light that easily increases the temperature of the component/device (for example, far-infrared light, Ultraviolet light, etc.), at the same time, these rays cannot cause the photovoltaic cell 500 to produce a photovoltaic effect (photovoltaic effect) or the photoelectric conversion efficiency is extremely low. The heat generated after these rays are directly absorbed is absorbed by the spectral heat transfer fluid in the first tube 110 The medium 120 is stored. In addition to the first light-transmitting hole 131 and the second light-transmitting hole 132, other parts of the insulation layer 130 are arranged around the outer periphery of the first tube 110 to insulate the first tube 110, greatly reducing heat. Loss, thereby obtaining and storing more heat, generating high-temperature thermal energy with higher thermal energy quality, thereby solving the technical problem of low thermal energy quality in the existing photovoltaic and photothermal integrated systems. On the other hand, in the process of photovoltaic power generation, since the heat collector tube absorbs the light in the non-responsive band, the heat collector tube is used as a light filter with a high thermal effect, that is, the light in the non-responsive band is pre-filtered (by the spectral heat transfer fluid medium 120 absorption), reducing the non-responsive band light emitted from the second light-transmitting hole 132, thereby reducing or even avoiding the non-responsive band light incident on the photovoltaic cell 500, and only transmitting the response band light (for example, visible light) that can produce the photovoltaic effect. etc.), and irradiates 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 disclosure reduces the heat incident on the photovoltaic cell 500, and reduces the amount of heat incident on the photovoltaic cell 500 in a disguised manner. The temperature of the photovoltaic cell 500 solves the problem of low device efficiency and short lifespan due to local high temperature of the photovoltaic cell 500 .

In the embodiment of the present disclosure, 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 light collecting cavity can collect more light, thereby enabling spectral heat conduction in the heat collecting tube. The fluid medium 120 obtains/stores more heat. At the same time, the concentrated light includes not only non-responsive band light, but also response band light that enables the photovoltaic cell 500 to produce a photovoltaic effect. The more of these response band light , the conversion rate of the photovoltaic cell 500 is improved; when the light is focused into the first tube 110, the heat collecting tube will obtain more heat, that is, high-temperature thermal energy with higher thermal energy quality will be generated, which greatly increases the energy of light. Comprehensive utilization and systems

efficiency.

In the embodiment of the present disclosure, as shown in Figures 1 and 2, the heat collecting tube also includes a second tube 140 that is sleeved outside the first tube 110. The second tube 140 can transmit light. The first tube 110 and the second tube The gap between 140 is a vacuum layer; the insulation layer 130 is set outside the second tube 140 . The provision of the vacuum layer can further insulate the heat stored in the first tube 110 and further ensure high-temperature heat with high thermal energy quality.

Specifically, in the embodiment of the present disclosure, the second tube 140 is a quartz glass tube, which can not only maintain 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 multiple first light-transmitting holes 131 , and correspondingly there are multiple second light-transmitting holes 132 and light concentrators 200 . With this arrangement, when a photovoltaic power generation system is set up, it can be set up as a distributed photovoltaic power generation system and achieve centralized Type heat collection.

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

In the embodiment of the present disclosure, as shown in Figure 1, a light rectifier 300 is also 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 disposed between the focus of the light and the photovoltaic cell. The optical integrator is disposed close to the second light-transmitting hole 132 to emit the light emitted from the second light-transmitting hole 132 . The concentrated light is rectified into a light beam required by the photovoltaic cell 500 , for example, 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 disclosure.

Of course, the light rectifier 300 may also include a concave lens, and the concave lens is also provided to rectify the light into the light beam required by the photovoltaic cell 500 . Among them, the concave lens can be concave on one side or concave on both sides. There is no limitation 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 disclosure; at this time, the focus of the light is between the concave lens and the Between the photovoltaic cells, the concave lens is disposed close to the second light-transmitting hole 132 to rectify the condensed light emitted from the second light-transmitting hole 132 into the light beam required by the photovoltaic cell 500 , for example, vertically incident on the photovoltaic cell 500 Parallel light.

The photovoltaic cogeneration system provided by the embodiment of the present disclosure includes: as shown in Figures 1 to 4, a condenser 400, a photovoltaic cell 500 and the above-mentioned light absorption and heat collection component. The light collected by the condenser 400 passes through the light collector 200. The optical cavity is incident into the first tube 110 of the heat collecting tube, and part of the light is absorbed by the spectral thermal conductive fluid medium 120 in the first tube 110. The unabsorbed light is emitted outside the heat collecting tube and then incident on the photovoltaic cell 500 to generate electricity.

In the photovoltaic cogeneration system provided by the embodiment of the invention, during the photovoltaic power generation process, the light can be condensed through the condenser 400 and incident on the light collecting cavity. The light collecting cavity can condense the light and incident on the third light through the first light-transmitting hole 131. In a tube 110, the light collecting cavity can gather more light, thereby allowing the spectral heat transfer fluid medium 120 in the heat collecting tube to obtain/store more heat. At the same time, the concentrated light not only includes non-responsive band light, but also includes The response band light can cause the photovoltaic cell 500 to produce the photovoltaic effect. The more of these response band light, the conversion rate of the photovoltaic cell 500 will be increased; when the light is focused into the first tube 110, the heat collecting tube will obtain More heat, that is, producing high-temperature thermal energy with higher thermal energy quality. That is, since the photovoltaic cogeneration system includes the above-mentioned spectral absorption and heat collection component, it has all the advantages of the above-mentioned spectral absorption and heat collection component, which will not be described again here.

In the prior art, in order to reduce the non-responsive band light directly incident on the photovoltaic cell 500, a structural method of setting up a beam splitter is usually used. Most of the solutions adopted are to set up a reflective film to reflect the non-responsive band light to the heat-absorbing component to absorb the heat. , the response band light that can cause the photovoltaic cell 500 to produce a photoelectric effect is incident on the photovoltaic cell 500. In the photovoltaic power generation system with this structure, the heat-absorbing component only has the function of absorbing heat and has no other functions. Since the spectrometer is set separately, the structure It is complex and requires high precision, and the production cost is high. 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 existing technology not only has a complex structure, but also has a complex function. Limited and costly.

In the embodiment of the present disclosure, 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 structure formed by the first tube 110 and the spectral heat-conducting fluid medium 120 in it is similar to In the convex lens structure, when the light passes through the first tube 110 and the spectral heat-conducting fluid medium 120 inside, it is equivalent to passing through the convex lens, that is, the heat collecting tube has the function of converging light, so the light condensation factor can be increased, thereby improving the Power generation efficiency. In other words, the heat collecting tube can not only improve heat storage efficiency, but also concentrate light to improve power generation efficiency. Such an arrangement can ensure or even improve photovoltaic power generation efficiency while improving high-quality thermal energy and simplifying the structure of the entire photovoltaic power generation system. , thereby reducing the cost; in the embodiment of the present disclosure, since the heat collecting tube can directly absorb the non-responsive band light, there is no need to specially set up a beam splitter and expensive reflective film, and the cost is further reduced; in addition, when the first tube and the photovoltaic heat conduction inside When the fluid medium has a light-concentrating function, a higher concentration of light can be obtained, thereby reducing the design size of the photovoltaic cell, thereby reducing the production cost of the photovoltaic cell. Comparison with the existing technology shows that the photovoltaic cells provided by the embodiments of the present disclosure The combined heat and power 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 disclosure, the spectral heat transfer fluid medium is selected from fluids composed of heat transfer oil, silicone oil, CoCl ₂ , CoSO ₄ , CuSO ₄ and other organic working fluids or molten salts that have selective absorption functions for the spectrum. 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-section and an optical integrator/concave lens/convex lens with optical path adjustment function can also be used. Path assembly, the spectral heat transfer fluid medium flows in the first tube 110 for heat exchange.

In the embodiment of the present disclosure, the photovoltaic cell 500 can be any cell that can absorb solar energy to produce photovoltaic effect (photoelectric effect) to generate electricity, including: crystalline silicon cells, amorphous silicon cells, perovskite cells, and gallium arsenide cells. wait.

Specifically, in the embodiment of the present disclosure, as shown in FIG. 3 , the condenser mirror 400 is a condenser mirror, and there are multiple condenser mirrors. Each condenser mirror 400 can focus the light point; the photovoltaic cell 500 has multiple condenser mirrors. In this embodiment, one condenser lens 400 corresponds to a group of light-transmitting holes (herein defined as: a group of light-transmitting holes is a first light-transmitting hole 131 and a corresponding second light-transmitting hole 132), a For example, the photovoltaic cells 500 are set up in this way to realize distributed power generation and centralized heat collection. That is, the light collected by each condenser 400 passes through the matching light-transmitting hole and passes through the heat collecting tube before being incident on the corresponding photovoltaic cell. The batteries 500 generate electricity separately to achieve distributed power generation. Each photovoltaic cell 500 can be set up in series or in parallel. The setting method is flexible and adaptable. Multiple condensers 400 can correspond to the same collector tube, thereby achieving centralized power generation. Type heat collection, easy to produce high-quality high-temperature heat energy. Compared with conventional low-parameter high-magnification concentrated photovoltaic and photothermal integrated systems, this system

Efficiency 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 condensers 400 correspond to the same set of light-transmitting holes, and multiple groups of light-transmitting holes correspond to the same photovoltaic cell 500, etc., which will not be done here. limited. When multiple sets of light-transmitting holes correspond to the same photovoltaic cell 500, the same photovoltaic cell 500 can obtain more light that causes the photovoltaic cell 500 to produce a photoelectric effect, thereby improving the photoelectric conversion rate, improving power generation efficiency, and reducing the Production cost of photovoltaic cell 500.

In the embodiment of the present disclosure, the condensing reflector is mainly composed of a butterfly-shaped concentrating reflector with light-concentrating performance, or mainly composed of a multiple reflection coupling transmission system, or mainly composed of a butterfly condensing reflector and a multiple reflection coupling transmission system. The composition, without specific limitations, is within the scope of protection claimed by the present disclosure. For example, the condensing reflector can be a hyperbolic trough, a hyperbolic dish, a reflective focusing device or a combined system. In addition, the condenser lens 400 can also adopt a transmission focusing system with light concentrating performance, such as a Fresnel lens and any other type of transmission focusing device or combination system.

The embodiment of the present disclosure also includes an altitude angle tracking system and an altitude angle adjustment component. The altitude angle tracking system is used to track the sun's altitude angle. 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. Possibly vertically incident on the photovoltaic cell 500 to ensure the power generation efficiency of the photovoltaic cell 500 .

The disclosed embodiment also includes an azimuth tracking system and an azimuth adjustment component. The azimuth tracking system is used to track the sun's azimuth angle. 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. Possibly vertically incident on the photovoltaic cell 500 to ensure the power generation efficiency of the photovoltaic cell 500 . Specifically, in the embodiment of the present disclosure, as shown in Figure 4, the azimuth angle adjustment assembly includes an arc-shaped guide rail 700. During the process of adjusting the azimuth angle, the photovoltaic cogeneration system can move along the arc-shaped guide rail 700.

In the embodiment of the present disclosure, 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, biaxial tracking can be achieved. For example, each point focusing mirror has Independent altitude angle tracking device and altitude angle adjustment device, but with a common azimuth angle tracking device and azimuth angle adjustment device; of course, the embodiments of the present disclosure are not limited to this arrangement, for example, each point focusing mirror can also be used It has a common altitude angle tracking device and altitude angle adjustment device.

In the embodiment of the present disclosure, as shown in FIG. 1 , a heat exchange cooler 600 is provided on the back of the photovoltaic cell 500 , and the heat exchange cooler 600 is used to cool the photovoltaic cell 500 . Specifically, the heat exchange cooler 600 may be a tube bundle type, a fin type, a printed circuit board type, or other types of heat exchange equipment. The heat exchange cooler setting of 600 can effectively reduce the temperature of the photovoltaic cells, thereby improving the power generation efficiency of the photovoltaic cells and extending the life of the photovoltaic cells.

To sum up, the spectroscopic absorption and heat collection components and the photovoltaic cogeneration system provided by the embodiments of the present disclosure utilize split spectrum technology and adopt a series point focusing system for distributed power generation and centralized heat collection. This system has the following advantages:

① Adopting absorption split spectrum technology, it realizes the independent operation of thermal energy and electrical energy, avoiding the problem of efficiency reduction and damage caused by non-responsive band light heating of photovoltaic modules. It also avoids the difficulty of improving the heat collection parameters due to the temperature limit of the module. question;

②The design of point focusing series connection reduces the investment in tracking system equipment. The tracking system of the multi-point focusing reflection system can be shared. At the same time, the heat collection system pipes can use connecting pipes to concentrate heat. As shown in Figure 4, each heat collecting tube can be 100% of the heat is gathered into the heat collecting main tube 160, which enables the entire heat collecting system to have the function of high-parameter heat collecting and reduces the investment in the heat collecting system;

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

The electric energy storage system provided by the embodiment of the present disclosure includes the above-mentioned photovoltaic cogeneration system, as well as a number of battery packs, power monitoring components, heating components and power supply switches. The battery pack is used to store the electric 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, 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 switches the power supply direction. Switch to heating element or mains power supply.

The power generation energy storage system provided by the embodiment of the present disclosure includes the above-mentioned photovoltaic combined heat and power system, so it has all the advantages of the above-mentioned photovoltaic combined heat and power system, that is, it can generate high-temperature thermal energy with higher thermal energy quality, greatly improving the efficiency of light. The comprehensive utilization rate of energy will not be described in details; in addition, when the battery pack is fully charged, the electric energy generated by the above-mentioned photovoltaic power generation system is stored in the battery pack. When the battery pack is fully charged, the power supply direction is changed through the power supply switch. Switch to the heating component so that the heating component is connected to the heat pipe for heating, or switch the power supply direction to the municipal power grid, thereby making full use of natural resource solar energy and improving power usage.

Although the present disclosure is disclosed as above, the present disclosure 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 disclosure. Therefore, the protection scope of the present disclosure should be subject to the scope defined by the claims.

Finally, it should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or any such actual relationship or sequence between operations. Furthermore, the term "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus including a list of elements includes not only those elements but also other elements not expressly listed, Or it also includes elements inherent to the process, method, article or equipment. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article, or apparatus that includes the stated element.

In the above embodiments, descriptions of orientations such as “left” and “right” are based on those shown in the accompanying drawings.

The above description of the disclosed embodiments enables those skilled in the art to make or use the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be practiced in other embodiments without departing from the spirit or scope of the disclosure. Therefore, the present disclosure is not 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

A spectroscopic absorption and heat collection component, characterized in that it is used in a photovoltaic power generation system, and the spectroscopic absorption and heat collection component includes a heat collecting tube (100) and a light concentrator (200);

The heat collecting tube includes a first tube (110), the first tube (110) is used to circulate a spectral heat transfer fluid medium (120), and the first tube (110) has a first light-transmitting part that can transmit light. and a second light-transmitting part; the first tube (110) has an insulation layer (130) outside, and the insulation layer (130) has a first light-transmitting hole (131) and a second light-transmitting hole (132), so The first light-transmitting hole (131) is provided in the first light-transmitting part, and the second light-transmitting hole (132) is provided in the second light-transmitting part;

The light concentrator (200) is provided in the first light-transmitting hole (131) and has a light-collecting cavity for condensing light;

The light collected by the light collection cavity passes through the first light-transmitting hole (131) and the first light-transmitting part in sequence and is incident into the first tube (110) and is absorbed by the spectral heat-conducting fluid medium (120). The unabsorbed light is sequentially The light is emitted out of the heat collecting tube (100) through the second light-transmitting part and the second light-transmitting hole (132).
The spectroscopic absorption heat collection component according to claim 1, characterized in that the heat collecting tube (100) further includes a second tube (140) sleeved outside the first tube (110), and the second tube (140) is The two tubes (140) can transmit light, and the gap between the first tube (110) and the second tube (140) is a vacuum layer (150); the insulation layer (130) is sleeved on the third tube (110). Outside the second tube (140).
The spectroscopic absorption heat collection component according to claim 2, characterized in that the second tube (140) is a quartz glass tube;

And/or, there are multiple first light-transmitting holes (131), and correspondingly there are multiple second light-transmitting holes (132) and the light concentrator (200);

And/or, the first tube (110) is a light-transmitting tube that can transmit light as a whole.
The spectroscopic absorption and heat collection component according to any one of claims 1 to 3, characterized in that it also includes a light rectifier (300) for rectifying the light emitted from the second light-transmitting hole (132) into a suitable photovoltaic Battery powered light beam.
A photovoltaic cogeneration system, characterized by comprising a condenser mirror (400), a photovoltaic cell (500) and the spectroscopic absorption heat collection component (010) according to any one of claims 1-4, the condenser mirror (400) The concentrated light is incident into the first tube (110) of the heat collecting tube (100) through the light collecting cavity of the light concentrator (200), and part of the light is absorbed by the spectral heat-conducting fluid medium in the first tube (110). (120) absorbs, and the unabsorbed light is emitted outside the heat collecting tube (100) and then incident on the photovoltaic cell (500) to generate electricity.
The photovoltaic cogeneration system according to claim 5, characterized in that the condenser mirror (400) is a condenser mirror, and there are multiple condenser mirrors (400), each of the condenser mirrors (400) can focus the light point; and/or , the photovoltaic cell (500) has multiple.
The photovoltaic cogeneration system according to claim 6, characterized in that the condensing reflector is mainly composed of a butterfly concentrating reflector with light concentrating performance and/or a multiple reflection coupling transmission system.
The photovoltaic cogeneration system according to any one of claims 5 to 7, further comprising:

An altitude angle tracking system and an altitude angle adjustment component, the altitude angle tracking system is used to track the sun's altitude angle, and the altitude angle adjustment component is used to adjust the altitude angle of the photovoltaic combined heat and power system;

And/or, an azimuth angle tracking system and an azimuth angle adjustment component, the azimuth angle tracking system is used to track the sun's azimuth angle, and the azimuth angle adjustment component is used to adjust the azimuth angle of the photovoltaic combined heat and power system.
The photovoltaic combined heat and power system according to claim 8, wherein 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 ( 700) Movement;

And/or, a heat exchange cooler (600) is provided on the back of the photovoltaic cell, and the heat exchange cooler (600) is used to cool the photovoltaic cell (500).
An electric energy storage system, characterized by comprising the photovoltaic cogeneration system described in any one of claims 5-9;

It also includes a number of battery packs, a power monitoring component, a heating component and a power supply switch. The battery pack is used to store the electric 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 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.