Two-way photovoltaic conversion method and system coupled with combustion flame spectroscopy and spectral regulation

Abstract

The application discloses a kind of combustion flame spectrophotometry and spectrum regulation coupling two-way photovoltaic conversion method and system, belong to energy conversion field.System includes burner, isolation device, selective emitter, first filter device, second filter device, first photovoltaic device and second photovoltaic device;Two photovoltaic devices include multiple two-way photovoltaic panels;Burner is used to generate high-temperature flame and high-temperature flue gas, isolation device is used to pass through the radiation generated by high-temperature flame to first filter device and limit the movement of high-temperature flue gas;Selective emitter receives high-temperature flue gas from isolation device, and emits radiation matching the waveband of two-way photovoltaic panel to second filter device;Two filter devices are used to pass through the radiation of the radiation waveband that two-way photovoltaic panel can utilize;Two-way photovoltaic panel is used to receive the radiation passing through first filter device and / or second filter device and convert it into electrical energy.The system has the characteristics of high energy utilization efficiency.

Description

Technical Field

[0001] The present invention belongs to the field of energy conversion, and in particular relates to a bidirectional photovoltaic conversion method and system coupled with combustion flame spectrometry and spectrum regulation. Background Art

[0002] With the continued growth of the global population and economy, global energy demand is growing strongly, ecological and environmental protection pressures are increasing, and global climate change is attracting widespread attention. Efficient fossil fuel utilization and the reduction of greenhouse gas emissions have become research hotspots in the energy field. However, traditional, crude fossil fuel combustion methods suffer from low energy efficiency and severe environmental pollution, with a large amount of heat lost as waste heat. Therefore, improving energy efficiency and achieving more environmentally friendly energy conversion are important issues that need to be addressed urgently.

[0003] Conventional combustion systems make very limited use of the radiant energy from high-temperature flames. The photons in high-temperature flames contain a rich, high-quality energy, and the radiation spectrum spans a complex and broad spectrum from ultraviolet to infrared. However, this energy is typically recovered only as heat in conventional combustion systems. The high-temperature flue gases after combustion are often cooled through cooling towers or heat exchangers, where a significant amount of the heat energy is also not effectively utilized. Further research is needed to further improve the conversion efficiency of the radiant energy generated during combustion.

[0004] Photovoltaic power generation, as a highly efficient method for converting radiation energy into electrical energy, is currently experiencing rapid development and is becoming increasingly important in the global energy mix. However, conventional photovoltaic cells, mostly used for solar photoelectric conversion, can only utilize photons within a specific wavelength range, leaving a significant amount of energy remaining unused. Therefore, applying photovoltaic power generation technology to other high-temperature thermal radiation sources, particularly combustion flames, and fully utilizing their energy across the entire wavelength range is a highly promising technological direction.

[0005] Therefore, there is an urgent need for a method that can efficiently utilize the radiation energy of combustion flames and flue gases to improve the overall energy efficiency of the system and reduce carbon emissions and environmental pollution. Summary of the Invention

[0006] In order to solve the problems in the prior art, the present invention provides a bidirectional photovoltaic conversion method and system that couples combustion flame spectrometry with spectrum regulation.

[0007] The technical solutions of the present invention are as follows:

[0008] In a first aspect, the present invention discloses a bidirectional photovoltaic conversion device that couples combustion flame spectrometry with spectral regulation, comprising a flame photovoltaic power generation device and a flue gas thermal photovoltaic power generation device, wherein the flame photovoltaic power generation device comprises a burner, an isolation device, a first filter device, and a first photovoltaic device, and the flue gas thermal photovoltaic power generation device comprises a selective emitter, a second filter device, and a second photovoltaic device; wherein the first photovoltaic device and the second photovoltaic device both comprise a plurality of bidirectional photovoltaic panels; the burner is used to generate high-temperature flames and high-temperature flue gas, and the isolation device is used to transmit radiation generated by the high-temperature flames to the first filter device and restrict the movement of the high-temperature flue gas; the selective emitter is connected to the isolation device, and is used to receive the high-temperature flue gas flowing from the isolation device, and convert the heat source radiation of the high-temperature flue gas into radiation matching the wavelength band of the bidirectional photovoltaic panel and transmit it to the second filter device; the first filter device and the second filter device are both used to transmit radiation in the radiation wavelength band that can be used by the bidirectional photovoltaic panel and reflect radiation in the radiation wavelength band that cannot be used by the bidirectional photovoltaic panel; the bidirectional photovoltaic panel is used to receive radiation passing through the first filter device and / or the second filter device and convert it into electrical energy.

[0009] Furthermore, the bidirectional photovoltaic conversion device also includes a cooling system, which is used to cool the isolation device and the bidirectional photovoltaic panel to ensure that both operate at a preset optimal temperature.

[0010] Furthermore, the bidirectional photovoltaic conversion device also includes an outlet flue gas waste heat utilization system, which is also connected to the selective emitter and is used to recover and utilize the waste heat of the high-temperature flue gas passing through the selective emitter.

[0011] In the second aspect, the present invention also discloses a bidirectional photovoltaic conversion system coupled with combustion flame spectrometry and spectrum regulation, comprising a plurality of bidirectional photovoltaic conversion devices coupled with combustion flame spectrometry and spectrum regulation, wherein the bidirectional photovoltaic conversion devices coupled with combustion flame spectrometry and spectrum regulation are arranged in the form of an array, and the flame photovoltaic power generation device of one bidirectional photovoltaic conversion device can only be interconnected with the flue gas thermal photovoltaic power generation device of another adjacent bidirectional photovoltaic conversion device and share a bidirectional photovoltaic panel.

[0012] In a third aspect, the present invention further discloses a bidirectional photovoltaic conversion method utilizing the coupling of combustion flame spectrometry and spectrum regulation of the bidirectional photovoltaic conversion system, comprising the following steps:

[0013] Start the burner, adjust the oxygen concentration and fuel ratio in the burner, and then ignite the fuel to generate high-temperature flame and high-temperature flue gas. The radiation generated by the high-temperature flame passes through the isolation device. The first filter device performs spectral division on the radiation passing through the isolation device. The first filter device transmits the radiation corresponding to the radiation band that can be used by the bidirectional photovoltaic panel, and reflects the radiation corresponding to the radiation band that cannot be used by the bidirectional photovoltaic panel. The radiation passing through the first filter device enters the bidirectional photovoltaic panel, and the bidirectional photovoltaic panel converts the radiation energy into electrical energy. At the same time, the high-temperature flue gas passes through the restriction of the isolation device and enters the selective emitter, which selects The selective emitter receives high-temperature flue gas and converts the heat source radiation of the high-temperature flue gas into radiation of a band matching the bidirectional photovoltaic panel and emits it to the second filtering device. The second filtering device transmits the radiation corresponding to the radiation band that can be used by the bidirectional photovoltaic panel and reflects the radiation corresponding to the radiation band that cannot be used by the bidirectional photovoltaic panel. The radiation passing through the second filtering device enters the bidirectional photovoltaic panel, and the bidirectional photovoltaic panel converts the radiation energy into electrical energy. In the bidirectional photovoltaic conversion system, the bidirectional photovoltaic panel located between the flame photovoltaic power generation device and the flue gas thermal photovoltaic power generation device simultaneously receives radiation from both sides and converts it into electrical energy.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention separates the radiation spectrum generated by the combustion flame through flame spectrometry technology and converts the band radiation energy into electrical energy through a photovoltaic device. At the same time, it uses thermal photovoltaic conversion technology to regulate the radiation spectrum of high-temperature flue gas to further capture the radiation energy in the flue gas, thereby achieving efficient energy conversion. In addition, a bidirectional photovoltaic panel is arranged between the flame photovoltaic power generation device and the flue gas thermal photovoltaic power generation device of the present invention. The bidirectional photovoltaic panel simultaneously receives the radiation energy of the high-temperature flame and high-temperature flue gas from both sides, ensuring maximum energy absorption and conversion. At the same time, part of the waste heat of the flue gas at the outlet of the flue gas thermal photovoltaic power generation device is further utilized as a resource through thermal power generation or waste heat utilization, thereby reducing the waste heat loss of the system. Therefore, the energy utilization conversion efficiency of the present invention is high and environmentally friendly, and it also has thermal management functions and a stable structure. In addition, the present invention is suitable for the field of efficient energy power generation and conversion, and has the characteristics of high energy utilization efficiency, high space utilization and low environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the combination of the bidirectional photovoltaic conversion device with different shapes (triangular, quadrilateral) of the present invention coupled with flame splitting and spectrum regulation;

[0017] Figure 2 Schematic diagram of the structure of a bidirectional photovoltaic conversion device coupled with flame splitting and spectrum regulation according to an embodiment of the present invention (quadrilateral channel);

[0018] Figure 3 Schematic diagram of the spatial combination between the bidirectional photovoltaic conversion devices of the quadrilateral channel of the present invention;

[0019] Figure 4 A top view of the spatial combination between the bidirectional photovoltaic conversion devices of the quadrilateral channel of the present invention;

[0020] Figure 5 The specific materials and structure diagram of the selective emitter of the present invention;

[0021] Figure 6 Specific materials and structure diagram of the filter device of the present invention.

[0022] In the figure: 1-burner, 2-isolator, 3-selective emitter, 4-filtering device, 5-bidirectional photovoltaic panel, 6-circulating cooling water system, 7-export flue gas waste heat utilization system. DETAILED DESCRIPTION

[0023] The present invention will be further described and illustrated below in conjunction with specific embodiments. The embodiments are merely illustrative of the present disclosure and do not limit its scope. The technical features of the various embodiments of the present invention may be combined accordingly, provided that there is no conflict between them.

[0024] Example

[0025] In response to the above-mentioned existing problems, the purpose of the present invention is to propose a bidirectional photovoltaic conversion method and system that couples combustion flame spectrometry with spectrum regulation. The radiation spectrum generated by the combustion flame is separated by flame spectrometry technology and converted into electrical energy through a photovoltaic device. At the same time, the radiation spectrum of the high-temperature flue gas is regulated by thermal photovoltaic conversion technology to further capture the radiation energy in the flue gas and achieve efficient energy conversion. A bidirectional photovoltaic panel 5 is arranged between the flame photovoltaic power generation device and the flue gas thermal photovoltaic power generation device. The bidirectional photovoltaic panel 5 simultaneously receives the radiation energy of the high-temperature flame and high-temperature flue gas from both sides to ensure maximum energy absorption and conversion. At the same time, part of the waste heat of the flue gas at the outlet of the flue gas thermal photovoltaic power generation device is further utilized as a resource through thermal power generation or waste heat utilization, thereby reducing the waste heat loss of the system.

[0026] Through the flexible splicing of the bidirectional photovoltaic conversion modules coupled with combustion flame spectroscopy and spectral regulation, the combustion flame photovoltaic power generation modules and the flue gas thermal photovoltaic power generation modules are arranged in a seamless and staggered manner in space, which optimizes the space utilization and thermal management effects, maximizes the overall performance of the bidirectional photovoltaic conversion system coupled with combustion flame spectroscopy and spectral regulation, and realizes the efficient conversion of combustion flame radiation energy.

[0027] To achieve the above purpose, if Figure 1As shown, the technical solution adopted by the present invention is to provide a bidirectional photovoltaic conversion system that couples combustion flame spectrometry with spectrum regulation. The bidirectional photovoltaic conversion system includes multiple bidirectional photovoltaic conversion modules that couple combustion flame spectrometry with spectrum regulation. The module includes two modules: a flame photovoltaic power generation module and a flue gas thermal photovoltaic power generation module. Figure 1 The "fire" in the code refers to the flame photovoltaic power generation module. Figure 1 The "smoke" in the figure represents the flue gas thermal photovoltaic power generation module. The top view of the flame photovoltaic power generation module and the flue gas thermal photovoltaic power generation module can be a triangle or a quadrilateral at the same time. Many identical bidirectional photovoltaic conversion modules coupled with flame spectral splitting and spectrum regulation are arranged in a certain spatial distribution to produce Figure 1 The triangular channels and quadrilateral channels shown in the figure are arranged in a staggered manner without any gaps in space, which optimizes the space utilization and thermal management effect, and maximizes the overall performance of the bidirectional photovoltaic conversion system coupled with combustion flame splitting and spectral regulation.

[0028] See also Figure 2 In an embodiment of the present invention, a bidirectional photovoltaic conversion device that couples combustion flame spectrometry and spectrum regulation is provided. The bidirectional photovoltaic conversion device includes a burner 1, an isolation device 2, a selective emitter 3, two groups of filter devices 4, two groups of photovoltaic devices, a circulating cooling water system 6 and an outlet flue gas waste heat utilization system 7. This embodiment uses a flame photovoltaic power generation module and a flue gas thermal photovoltaic power generation module that are quadrilateral in top view.

[0029] Among them, the bidirectional photovoltaic conversion device is divided into a flame photovoltaic power generation device and a flue gas thermal photovoltaic power generation device. The flame photovoltaic power generation device includes a burner 1, an isolation device 2, a first filter device and a first photovoltaic device, and the flue gas thermal photovoltaic power generation device includes a selective emitter 3, a second filter device and a second photovoltaic device; the burner 1 is used to generate high-temperature flames and high-temperature flue gas, and the isolation device 2 is used to ensure that the radiation generated by the high-temperature flame can be effectively transmitted and is also used to limit the movement of high-temperature flue gas; the first photovoltaic device includes a plurality of bidirectional photovoltaic panels 5, and the first filter device is used to perform spectral segmentation on the radiation transmitted from the isolation device 2, and the radiation band that can be used through the bidirectional photovoltaic panel 5 corresponds to radiation, and reflects radiation corresponding to the radiation band that cannot be used by the bidirectional photovoltaic panel 5; the second photovoltaic device includes a plurality of bidirectional photovoltaic panels 5, and the selective emitter 3 is connected to the isolation device 2, for receiving the high-temperature flue gas flowing from the isolation device 2, and converting the heat source radiation of the high-temperature flue gas into radiation that matches the band gap of the bidirectional photovoltaic panel 5 and emitting it to the second filtering device; the second filtering device is used to transmit the radiation corresponding to the radiation band that can be used by the bidirectional photovoltaic panel 5, and reflect the radiation corresponding to the radiation band that cannot be used by the bidirectional photovoltaic panel 5; the bidirectional photovoltaic panel 5 is used to receive the radiation passing through the first filtering device and the second filtering device and convert it into electrical energy.

[0030] The burner 1 is placed in the flame photovoltaic power generation device, and converts chemical energy into thermal energy by burning fuel, generating high-temperature flame and high-temperature flue gas, which provides energy for the bidirectional photovoltaic conversion device.

[0031] Burner 1 utilizes high-temperature resistant materials such as high-temperature alloys, ceramics, and composite materials, along with coating technology to withstand high-temperature and chemically corrosive environments, extending its operating life. Burner 1 utilizes gaseous fuels such as methane as its primary energy source. During combustion, methane and other gaseous fuels react with oxygen to release significant amounts of chemical energy. The resulting high-temperature flame radiates outward, providing energy and a stable radiation source for the bidirectional photovoltaic conversion device.

[0032] Energy-efficient combustion methods such as oxygen-enriched combustion can also be selected. While ensuring a stable, high-temperature flame, this significantly improves combustion performance, further enhancing fuel combustion efficiency and reducing localized high temperatures to reduce NOx emissions and pollutant emissions. Oxygen-enriched combustion primarily involves mixing a certain amount of oxygen with air in a predetermined ratio and injecting it into the burner 1 along with the fuel for combustion. This method aims to increase the proportion of oxygen in the combustion process, more effectively promoting complete combustion of the fuel, improving system combustion efficiency and temperature, and reducing pollutant emissions.

[0033] At the same time, solid fuel particles can be optionally mixed into the fuel to enhance radiation intensity and achieve the dual goals of efficient combustion and energy conservation and emission reduction; mixing solid fuel particles can also increase the overall energy density of the fuel and improve combustion dynamics, achieving higher heat release and a smoother flame shape.

[0034] In a specific embodiment of the present invention, the burner 1 uses high-temperature resistant 253MA stainless steel as the shell material, uses methane with high calorific value as the fuel gas, and adopts an oxygen-enriched combustion method to mix a certain amount of oxygen and air in a preset proportion, and then introduce them into the burner together with the fuel gas for combustion. At the same time, a small amount of fine coal powder particles is added to enhance the radiation intensity and maintain the flame shape, providing a stable high-temperature heat radiation source for the system.

[0035] Isolation device 2 is placed above burner 1. Its main body is a high-temperature-resistant, high-purity quartz glass tube. Multiple quartz glass tubes are closely arranged in a circular pattern to form a combustion cavity, forming isolation device 2. This device limits the movement of the high-temperature flame and flue gas, preventing them from directly contacting and damaging the filter device 4 and bidirectional photovoltaic panels 5 located outside of the isolation device 2. The quartz glass tubes also possess excellent high-temperature resistance, chemical stability, and mechanical strength, offering excellent light transmittance across the entire ultraviolet to infrared wavelength range. While transmitting flame radiation in high-temperature environments, they prevent direct contact between the flame and flue gas and the filter device 4 and bidirectional photovoltaic panels 5, protecting them.

[0036] The quartz glass tube is also connected to a circulating cooling water system 6, forming a closed-loop cooling circuit to cool the isolation device 2. Cooling water from the circulating cooling water system 6 circulates through the quartz glass tube, removing heat from the tube and helping to cool it down, preventing it from cracking due to high temperatures. A temperature sensor is also installed on the quartz glass tube to monitor its temperature in real time.

[0037] In one embodiment of the present invention, the isolation device 2 is constructed from a quartz glass tube material characterized by high temperature resistance, excellent chemical stability, strong light transmittance, and high mechanical strength. Multiple quartz glass tubes are closely arranged in a circular pattern, forming a stable hollow combustion zone to confine flames and smoke. Circulating cooling water from the circulating cooling water system 6 dissipates heat from the flames through the quartz glass tubes, preventing them from rupturing due to the intense thermal stresses of high temperatures.

[0038] The selective emitter 3 is a quadrilateral structure formed by splicing square high-absorption materials and is placed on the side of the flue gas thermal photovoltaic power generation device. The selective emitter 3 is connected to the isolation device 2 through a pipe to receive and wrap the high-temperature flue gas flowing from the isolation device 2.

[0039] The square high-absorption material of the selective emitter 3 has an internal porous structure and an emission-side nano-multilayer film structure. Specifically, the square shape design provides convenient conditions for pore structure processing and surface nanomaterial deposition. The internal porous structure significantly increases the contact specific surface area between the material and the radiation, and through the complex pore path, the incident radiation undergoes multiple reflections and scatterings, thereby greatly enhancing the optical path, improving the radiation energy absorption rate of the substrate material, and contributing to the efficient absorption of flue gas radiation energy. The emission-side nano-multilayer film structure is designed according to the spectral response band of the photovoltaic cell, and exhibits high emissivity in the photovoltaic cell response band, and has lower emissivity in other bands. This characteristic allows the absorbed energy to be concentrated as much as possible at the photovoltaic cell for conversion, and achieves narrow-band radiation matching the photovoltaic cell on the emission surface, thereby improving the overall energy utilization efficiency of the system and achieving the effect of spectral regulation.

[0040] In a specific embodiment of the present invention, the square high absorption material of the selective emitter 3 adopts a multilayer thin film structure material formed by tungsten (W) as a substrate and silicon dioxide (SiO2) and tungsten (W) alternately deposited on the substrate, wherein multiple layers of silicon dioxide (SiO2) and multiple layers of tungsten (W) are deposited on the substrate.

[0041] like Figure 5 As shown, a 0.5mm-thick porous tungsten substrate is fabricated using methods such as powder metallurgy, 3D printing, and etching. Silicon dioxide and tungsten are deposited on the substrate using magnetron sputtering to form the emitter layer. The membrane structure has been theoretically designed and optimized to ensure material selectivity for absorption and emission bands. The epitaxial membrane structure of the emitter layer comprises, from the inside out, 200nm SiO2, 18nm W, and 250nm SiO2. This structure allows the emitter to emit radiation energy within the photovoltaic cell's response band of 1100-1500nm with high emissivity, enabling spectral control of high-temperature flue gas radiation and improving energy utilization efficiency. The filter device 4 is primarily a square filter, formed by multiple filters arranged and connected to form a surrounding structure. It is placed outside the isolation device 2 and the selective emitter 3 and can be formed into a triangular or quadrangular prism structure, depending on the design requirements. The filter device 4 is used to transmit radiation in a radiation band that can be used by the bidirectional photovoltaic panel 5 and reflect back radiation in a radiation band that cannot be used by the bidirectional photovoltaic panel 5 .

[0042] The filter uses a multi-layer dielectric thin film structure material with quartz as the base. The thin film structure has been theoretically designed and optimized, and mainly uses the multi-layer thin film interference effect. It can selectively transmit photons in the visible light and near-infrared bands, while photons in other bands are reflected, reducing photon loss while improving energy utilization efficiency.

[0043] In one embodiment of the present invention, the filter device 4 is a rectangular parallelepiped structure surrounded by a filter. The filter utilizes a multilayer dielectric thin film structure, constructed from alternating layers of silicon dioxide (SiO2) and titanium dioxide (TiO2) thin films stacked on a quartz substrate. This multilayer dielectric thin film structure utilizes the interference effect of the thin films to allow radiation energy in the visible light range and part of the near-infrared range to pass through, while reflecting energy in the remaining wavelengths, thereby reducing photon loss.

[0044] By designing and controlling the number and thickness of thin films, different central wavelengths and bandwidths can be tuned to match different photovoltaic cells. Figure 6 As shown, for a gallium arsenide (GaAs) cell, filter device 4 uses a 1mm transparent glass (SiO2) substrate. The multilayer dielectric thin film structure, from the inside out, includes: 150nm SiO2, 320nm TiO2, and 80nm SiO2. This design enables filter device 4 to achieve a radiation transmittance exceeding 90% in the 400nm-800nm ​​band.

[0045] The bidirectional photovoltaic panels 5 serve as the power generation units of the bidirectional photovoltaic conversion device. The square bidirectional photovoltaic panels 5 are arranged and connected to form a specific shape, forming a first photovoltaic device and a second photovoltaic device, respectively placed outside the two filter devices 4. The first and second photovoltaic devices each have a triangular or quadrangular prism structure composed of multiple bidirectional photovoltaic panels 5. The structural shape of the first and second photovoltaic devices is the same as that of the filter device 4. The first and second photovoltaic devices are coupled to each other by sharing a single bidirectional photovoltaic panel 5. Specifically, the bidirectional photovoltaic panel 5 connects to both the flame photovoltaic power generation device and the flue gas thermal photovoltaic power generation device. The bidirectional photovoltaic panel 5 simultaneously receives radiation transmitted from both the flame photovoltaic power generation device and the flue gas thermal photovoltaic power generation device and efficiently converts it into electrical energy, effectively utilizing the radiation resources on both sides. Furthermore, the bidirectional photovoltaic panels 5 are made of a highly efficient translucent material, allowing unused radiation to penetrate and be transmitted to the adjacent bidirectional photovoltaic conversion device.

[0046] Bidirectional photovoltaic panels 5 use cells with double-sided power generation capabilities. The cells are semi-transparent and have a band gap energy greater than or equal to the semiconductor. Photons with energy smaller than the band gap can excite electrons to jump from the valence band to the conduction band, while photons with energy smaller than the band gap can pass through the solar panels into the adjacent bidirectional photovoltaic conversion device, thereby improving the overall energy utilization efficiency.

[0047] The cooling pipes are arranged between two adjacent two-way photovoltaic cell panels 5 in the first photovoltaic device and the second photovoltaic device, are connected with the circulating cooling water system 6, and form a closed cooling loop to cool the two-way photovoltaic cell panels 5. The heat of the two-way photovoltaic cell panels 5 is removed by the convection heat exchange of the cooling water output by the circulating cooling water system 6, so that the two-way photovoltaic cell panels 5 can still maintain the optimal working temperature in the high-temperature two-way photovoltaic conversion device, always keep a high photoelectric conversion efficiency in the working process, reduce the efficiency loss caused by the temperature rise of the two-way photovoltaic cell panels 5, and delay the aging process of the packaging material caused by high temperature. The temperature sensor is further arranged on the two-way photovoltaic cell panel 5 to collect the temperature of the two-way photovoltaic cell panel 5 in real time.

[0048] The two-way photovoltaic cell panel 5 adopts a material (such as a GaAs cell) with excellent photoelectric conversion efficiency at high temperature, such as arsenic, gallium, indium, etc., and adopts a double-sided symmetrical structure. The two-way photovoltaic cell panel 5 receives radiation from the flame photovoltaic power generation device and the flue gas heat photovoltaic power generation device on two sides, respectively, and efficiently utilizes the double-sided radiation resources.

[0049] In an embodiment of the present application, the two-way photovoltaic cell panel 5 is a double-sided semi-transparent panel structure, adopts a material with excellent photoelectric conversion efficiency at high temperature, such as gallium arsenide (GaAs), realizes the utilization of two-way spectrum, and efficiently converts the radiation energy from the flame and the flue gas side.

[0050] The circulating cooling water system 6 is used to cool the isolation device 2 and the two-way photovoltaic cell panel 5, effectively controls the temperature of the two, and improves the working efficiency and prolongs the service life of the two-way photovoltaic cell panel 5.

[0051] The circulating cooling water system 6 includes a cooling tower, a pump and a temperature control device. When working, the pump extracts low-temperature cooling water from the cooling tower and pressurizes and pumps it into the quartz glass tube and the cooling pipe. The heat of the quartz glass tube and the heat of the two-way photovoltaic cell panel 5 are taken out by convection heat exchange. The high-temperature cooling water is sent back to the cooling tower after forming. The high-temperature cooling water is cooled and re-cooled to low-temperature cooling water in the tower by air natural convection, and forms a cycle.

[0052] The cooling pipe adopts a material with high thermal conductivity and excellent corrosion resistance and mechanical strength, such as stainless steel, which can quickly obtain heat from the two-way photovoltaic cell panel 5 and transfer it to the cooling water, improve the overall heat transfer efficiency of the circulating cooling water system 6, and help to maintain more uniform and stable temperature.

[0053] The cooling tower cools the high-temperature cooling water by natural convection. The high-temperature cooling water is dispersed into fine droplets by a nozzle at the top of the tower and sprayed and contacted with air in a large area. The air passes through the cooling tower by natural convection and takes out the heat in the water outside the tower.

[0054] The temperature control device monitors in real time the temperature of the quartz glass tube collected by the tube temperature sensor on the quartz glass tube and the temperature collected by the temperature sensor on the bidirectional photovoltaic panel 5, and automatically adjusts the power of the pump according to the temperature fluctuation to control the flow of cooling water, thereby achieving stable temperature control, preventing the quartz glass tube and the bidirectional photovoltaic panel 5 from overheating and extending the service life of both.

[0055] The outlet flue gas waste heat utilization system 7 is also connected to the selective transmitter 3 and is used to receive the high-temperature flue gas passing through the selective transmitter 3 and recover the waste heat of the high-temperature flue gas. By using the high-temperature flue gas for thermal power generation and waste heat utilization, waste heat loss is reduced and the energy utilization efficiency of the bidirectional photovoltaic conversion device is improved.

[0056] The outlet flue gas waste heat utilization system 7 mainly consists of a high-efficiency energy recovery system including a waste heat boiler, an air preheater and a heat exchanger. It converts part of the flue gas waste heat into valuable energy through flue gas thermal power generation and waste heat utilization, thereby further utilizing the flue gas waste heat as a resource, reducing waste heat waste and improving the energy utilization efficiency of the bidirectional photovoltaic conversion device.

[0057] Waste heat boilers (HRSGs) are used to generate thermal power from flue gas waste heat. The high-temperature flue gas at the outlet is first directed into the HRSG, where it releases heat to feed water, evaporating it and generating high-pressure steam. This high-pressure steam then drives a steam turbine, which in turn drives a generator to generate electricity. This process effectively converts waste heat from the flue gas and improves the energy efficiency of the bidirectional photovoltaic conversion system.

[0058] The air preheater is used to preheat the combustion air. The high-temperature flue gas at the outlet is heat-exchanged with the combustion air through the heat exchanger, which initially raises the temperature of the combustion air, improves combustion efficiency and reduces fuel consumption, further reducing the operating cost of the bidirectional photovoltaic conversion device while reducing emissions.

[0059] Heat exchangers are used to provide centralized heating for a district. High-temperature flue gas at the outlet passes through the heat exchanger, where it indirectly contacts cold water. The resulting hot water is then transported to the user through a pipe network. This hot water is then used to provide a comfortable indoor temperature for residents via radiators or floor heating systems. Depending on the specific design, multiple heat exchangers may be connected in series or parallel to maximize heat recovery from the flue gas.

[0060] In a preferred embodiment of the present invention, Figure 3 and Figure 4As shown, the present invention also provides a bidirectional photovoltaic conversion system coupled with combustion flame spectrometry and spectrum regulation, which includes a plurality of bidirectional photovoltaic conversion devices coupled with combustion flame spectrometry and spectrum regulation, and the bidirectional photovoltaic conversion devices coupled with combustion flame spectrometry and spectrum regulation are arranged in the form of an array, and the flame photovoltaic power generation device of a bidirectional photovoltaic conversion device can only be interconnected with the flue gas thermal photovoltaic power generation device of another adjacent bidirectional photovoltaic conversion device and share a bidirectional photovoltaic panel 5.

[0061] The combination of multiple bidirectional photovoltaic conversion devices creates a seamless, staggered arrangement of the flame photovoltaic power generation device and the flue gas thermal photovoltaic power generation device, optimizing the space utilization of the bidirectional photovoltaic conversion system. Bidirectional photovoltaic panels 5, placed between the flame photovoltaic power generation device and the flue gas thermal photovoltaic power generation device, receive radiation from both sides and efficiently convert it into electricity, effectively utilizing space resources.

[0062] In an embodiment of the present invention, the present invention further provides a bidirectional photovoltaic conversion method using the coupling of combustion flame spectrometry and spectrum regulation of a bidirectional photovoltaic conversion system, comprising the following steps:

[0063] Burner 1 is started, and a predetermined amount of oxygen and air are mixed in an oxygen-enriched combustion method. This mixture, along with methane fuel and a small amount of pulverized coal particles, is injected into burner 1, igniting to produce a high-temperature flame and high-temperature flue gas. In the flame photovoltaic power generation device, the high-temperature flue gas moves upward through the combustion zone formed by the quartz glass tube. The high-temperature radiation generated by the high-temperature flame passes through isolation device 2. A first filter spectrally separates the radiation that passes through isolation device 2, transmitting radiation in the visible light range and a portion of the near-infrared range to bidirectional photovoltaic panels 5 while reflecting radiation energy in the remaining wavelengths. In other words, the first filter transmits radiation corresponding to the wavelengths that bidirectional photovoltaic panels 5 can utilize, while reflecting radiation corresponding to wavelengths that bidirectional photovoltaic panels 5 cannot utilize. The radiation that passes through the first filter enters bidirectional photovoltaic panels 5, which convert the radiation energy into electrical energy.

[0064] High-temperature flue gas enters the flue gas thermal photovoltaic power generation device through a pipeline. The porous selective emitter 3 first absorbs the high-temperature flue gas's radiant energy. Simultaneously, it selectively emits narrowband radiation from the emission side, matching the response band of the photovoltaic panel 5. This achieves the effect of regulating the flue gas's radiation spectrum. Specifically, the selective emitter 3 absorbs the high-temperature flue gas and converts the heat source radiation from the high-temperature flue gas into radiation matching the bidirectional photovoltaic panel 5, which is then transmitted to the second filter device. The second filter device transmits radiation corresponding to the radiation band that the bidirectional photovoltaic panel 5 can utilize, while reflecting radiation corresponding to the radiation band that the bidirectional photovoltaic panel 5 cannot utilize. The radiation that passes through the second filter device enters the bidirectional photovoltaic panel 5, which converts the radiation energy into electrical energy.

[0065] Among them, in the bidirectional photovoltaic conversion system, the bidirectional photovoltaic panel 5 located between the flame photovoltaic power generation device and the flue gas thermal photovoltaic power generation device simultaneously receives radiation from both sides and efficiently converts it into electrical energy, realizing efficient conversion of combustion radiation energy.

[0066] Under the control of a temperature control device, a circulating cooling water system 6 circulates cooling water to cool the isolation device 2 and bidirectional photovoltaic panels 5, ensuring that all components operate at optimal temperatures, improving the efficiency and extending the life of the bidirectional photovoltaic conversion system. The cooling water is cooled in a cooling tower, forming a circuit. High-temperature flue gas passing through the selective emitter 3 is recycled through the outlet flue gas waste heat recovery system 7. This system uses a plate heat exchanger to generate hot water for centralized heating in residential areas, reducing waste heat from the bidirectional photovoltaic conversion system and improving energy efficiency.

[0067] Through the above-described specific embodiments, the bidirectional photovoltaic conversion system of the present invention, which couples combustion flame spectroscopy and spectral control, achieves efficient conversion of combustion flame radiation energy. This system is applicable to the field of combustion energy conversion and has the advantages of high energy utilization efficiency, high space utilization, and low environmental pollution. The above-described embodiments only represent several embodiments of the present invention, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the present invention.

[0068] The above-described embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. Persons skilled in the art will readily appreciate that variations and modifications may be made without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A bidirectional photovoltaic conversion system coupled with flame splitting and spectrum regulation, characterized in that: The invention comprises a plurality of bidirectional photovoltaic conversion devices coupled with combustion flame spectroscopy and spectrum regulation, wherein the bidirectional photovoltaic conversion devices coupled with combustion flame spectroscopy and spectrum regulation comprise a flame photovoltaic power generation device and a flue gas thermal photovoltaic power generation device, wherein the flame photovoltaic power generation device comprises a burner (1), an isolation device (2), a first filter device and a first photovoltaic device, and the flue gas thermal photovoltaic power generation device comprises a selective emitter (3), a second filter device and a second photovoltaic device; wherein the first photovoltaic device and the second photovoltaic device both comprise a plurality of bidirectional photovoltaic panels (5); the bidirectional photovoltaic conversion devices coupled with combustion flame spectroscopy and spectrum regulation are arranged in an array, and the flame photovoltaic power generation device of one of the bidirectional photovoltaic conversion devices can only be interconnected with the flue gas thermal photovoltaic power generation device of another adjacent bidirectional photovoltaic conversion device and share a bidirectional photovoltaic panel (5); The burner (1) is used to generate high-temperature flame and high-temperature flue gas, and the isolation device (2) is used to transmit radiation generated by the high-temperature flame to the first filter device and limit the movement of the high-temperature flue gas; The selective emitter (3) is connected to the isolation device (2) and is used to receive the high-temperature flue gas flowing from the isolation device (2), and convert the heat source radiation of the high-temperature flue gas into radiation with a wavelength matching the bidirectional photovoltaic panel (5) and emit it to the second filter device; The first filter device and the second filter device are both used to transmit radiation in a radiation band that can be used by the bidirectional photovoltaic panel (5) and reflect radiation in a radiation band that cannot be used by the bidirectional photovoltaic panel (5); the bidirectional photovoltaic panel (5) is used to receive radiation passing through the first filter device and / or the second filter device and convert it into electrical energy.

2. The bidirectional photovoltaic conversion system coupled with combustion flame splitting and spectrum regulation according to claim 1 is characterized in that: The bidirectional photovoltaic conversion device further comprises a cooling system, which is used to cool the isolation device (2) and the bidirectional photovoltaic panel (5) to ensure that both operate at a preset optimal temperature.

3. The bidirectional photovoltaic conversion system coupled with combustion flame splitting and spectrum regulation according to claim 1 is characterized in that: The bidirectional photovoltaic conversion device further comprises an outlet flue gas waste heat utilization system (7), which is also connected to the selective emitter (3) and is used to recover and utilize the waste heat of the high-temperature flue gas passing through the selective emitter (3).

4. The bidirectional photovoltaic conversion system coupled with combustion flame splitting and spectrum regulation according to claim 1 is characterized in that: The burner (1) uses gas fuel as fuel and can be burned in an oxygen-enriched combustion-supporting manner to generate high-temperature flames and high-temperature flue gas; wherein the oxygen-enriched combustion-supporting manner is to fully mix oxygen and air in a preset ratio and then introduce them together with the fuel into the combustion chamber of the burner (1); solid fuel particles can also be mixed into the fuel to enhance radiation intensity.

5. The bidirectional photovoltaic conversion system coupled with combustion flame splitting and spectrum regulation according to claim 2 is characterized in that: The isolation device (2) is a cylindrical structure formed by arranging a plurality of quartz glass tubes in a circular array to limit the movement of high-temperature flue gas while preventing the high-temperature flue gas from directly contacting the first filter device; the quartz glass tubes are connected to a cooling system to form a closed-loop cooling circuit to achieve cooling of the isolation device (2).

6. The bidirectional photovoltaic conversion system coupled with combustion flame splitting and spectrum regulation according to claim 1 is characterized in that: The material of the selective emitter (3) is a multilayer thin film structure material, which uses porous tungsten as a substrate and alternately deposits silicon dioxide and tungsten on the emitting surface of the substrate, wherein several layers of silicon dioxide and several layers of tungsten are deposited on the substrate.

7. The bidirectional photovoltaic conversion system coupled with combustion flame splitting and spectrum regulation according to claim 1 is characterized in that: The first filter device and the second filter device are both triangular prism structures or quadrangular prism structures composed of multiple filters. The filters are multi-layer dielectric thin film structures with quartz as the substrate and silicon dioxide and titanium dioxide alternately deposited on the substrate; wherein several layers of silicon dioxide and several layers of titanium dioxide are deposited on the substrate.

8. The bidirectional photovoltaic conversion system coupled with combustion flame splitting and spectrum regulation according to claim 2 is characterized in that: The first photovoltaic device and the second photovoltaic device are both triangular prism structures or quadrangular prism structures composed of a plurality of bidirectional photovoltaic panels (5), and the first photovoltaic device and the second photovoltaic device are coupled to each other by sharing a certain bidirectional photovoltaic panel (5), and the structural shapes of the first photovoltaic device and the second photovoltaic device are the same as the structural shape of the filter device (4); A cooling pipe is arranged between two adjacent bidirectional photovoltaic panels (5) in the first photovoltaic device and the second photovoltaic device. The cooling pipe is connected to the cooling system and forms a closed-loop cooling circuit to cool the bidirectional photovoltaic panels (5). The bidirectional photovoltaic panels (5) are a double-sided symmetrical and translucent panel structure. The material of the bidirectional photovoltaic panels (5) is a high-temperature resistant photovoltaic cell material including arsenic, gallium or indium; the high-temperature resistant photovoltaic cell material is gallium arsenide, copper indium gallium selenide or cadmium telluride.

9. A bidirectional photovoltaic conversion method utilizing the combustion flame splitting coupled with spectrum control of the bidirectional photovoltaic conversion system of claim 1, characterized in that: The following steps are involved: The burner (1) is started, the concentration of oxygen and the ratio of fuel in the burner (1) are adjusted, and the fuel is then ignited to generate a high-temperature flame and high-temperature flue gas. The radiation generated by the high-temperature flame passes through the isolation device (2). The first filter device performs spectral segmentation on the radiation passing through the isolation device (2). The first filter device transmits radiation corresponding to a radiation band that can be used by the bidirectional photovoltaic panel (5) and reflects radiation corresponding to a radiation band that cannot be used by the bidirectional photovoltaic panel (5). The radiation passing through the first filter device enters the bidirectional photovoltaic panel (5), and the bidirectional photovoltaic panel (5) converts the radiation energy into electrical energy. At the same time, the high-temperature flue gas passes through the restriction of the isolation device (2) and enters the selective emitter (3). The selective emitter (3) receives the high-temperature flue gas and converts the heat source radiation of the high-temperature flue gas into radiation of a wavelength matching the bidirectional photovoltaic panel (5) and transmits it to the second filter device. The second filter device transmits the radiation corresponding to the radiation wavelength that can be used by the bidirectional photovoltaic panel (5) and reflects the radiation corresponding to the radiation wavelength that cannot be used by the bidirectional photovoltaic panel (5). The radiation passing through the second filter device enters the bidirectional photovoltaic panel (5), and the bidirectional photovoltaic panel (5) converts the radiation energy into electrical energy. Wherein, in the bidirectional photovoltaic conversion system, the bidirectional photovoltaic panel (5) located between the flame photovoltaic power generation device and the flue gas thermal photovoltaic power generation device simultaneously receives radiation from both sides and converts it into electrical energy.

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