CN112412562A - Photo-thermal cascade power generation system and method with combined cycle coupling of thermophotovoltaic and external combustion type fuel gas and steam - Google Patents
Photo-thermal cascade power generation system and method with combined cycle coupling of thermophotovoltaic and external combustion type fuel gas and steam Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/30—Thermophotovoltaic systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/42—Cooling means
- H02S40/425—Cooling means using a gaseous or a liquid coolant, e.g. air flow ventilation, water circulation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention discloses a photothermal cascade power generation system and method with combined cycle coupling of thermophotovoltaic and external combustion type gas and steam. The method comprises the following steps of firstly, carrying out photovoltaic power generation by utilizing energy generated by combustion release, and realizing thermal photovoltaic primary power production; secondly, the air is heated by using high-temperature flue gas, and the high-temperature and high-pressure air enters an air turbine to expand and do work to drive a generator set to generate electricity, so that a secondary electricity production process is realized; and finally, heating the flue gas subjected to heat exchange in a waste heat boiler to supply water to generate steam, and enabling the steam to enter a steam turbine to expand and do work to drive a generator set to generate power so as to realize a three-stage power production process. The invention realizes the three-level power production process by the idea of light-heat energy gradient conversion, utilizes the energy of fuel combustion to the maximum extent and can improve the efficiency of the prior power generation technology.
Description
Technical Field
The invention belongs to the technical field of combustion power generation, and particularly relates to a photothermal cascade power generation system and method with combined cycle coupling of thermophotovoltaic and external combustion type fuel gas and steam.
Background
Thermal power generation is a major electricity production mode in the world, and the basic process is to use the heat energy generated by burning fuel to enter various thermodynamic cycles, so as to convert the heat energy into mechanical energy for electricity production. The maximum temperature of the power cycle working medium is limited due to the material properties, which limits the efficiency of the existing power cycle unit. The best technology is the gas-steam combined cycle at present, and the efficiency can reach more than 55%. The space for further improving the cycle efficiency is small.
On the other hand, fuel combustion can generate high temperatures of about 1600 ℃ to 2000 ℃. High temperatures generate a large amount of radiant energy. If the high-temperature energy is firstly subjected to radiation energy conversion, the residual heat energy is continuously converted through the traditional power cycle, and then the stepped conversion of the combustion photo-thermal energy can be realized, so that the efficiency of fuel combustion power generation is effectively improved. Thermophotovoltaic techniques based on photoelectric conversion of radiant energy are well suited. Thermophotovoltaic is an emerging technology for directly converting thermal energy into electric energy, and mainly comprises a combustion chamber, an emitter, a filter and a photovoltaic cell. The heat energy generated by fuel combustion heats the radiator to generate high-temperature heat radiation, the high-temperature heat radiation is filtered by the filter to form usable wave bands, and the usable wave bands are returned to the non-convertible wave bands, so that the spectrum radiation suitable for the photovoltaic cell enters the cell to generate electric energy. The higher the temperature is, the larger the radiation energy is, the higher the high-frequency available waveband is, and the higher the efficiency of the thermophotovoltaic system is. Therefore, the thermal photovoltaic combined thermal power circulation system can effectively utilize high-temperature energy of combustion and realize graded utilization of photo-thermal energy, thereby improving the performance of the power circulation system.
Disclosure of Invention
The invention aims to solve the technical problem that the efficiency improvement of the existing combustion thermal power cycle is limited only by single heat energy conversion, and provides a thermal photovoltaic and external combustion type gas and steam combined cycle coupled photo-thermal step power generation system and method.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention firstly provides a photothermal cascade power generation system with combined cycle coupling of thermophotovoltaic and external combustion type fuel gas and steam, which comprises a thermophotovoltaic power generation system, a combustion chamber, a secondary air power generation unit and a tertiary steam power generation unit;
the thermophotovoltaic power generation system comprises a photovoltaic cell, a cooling channel, a selective filter and a selective radiator; the selective radiator is arranged on the outer wall of the combustion chamber, the photovoltaic cell is arranged around the outer wall of the combustion chamber, and the selective filter is arranged between the selective radiator and the photovoltaic cell; the cooling channel is arranged at the back of the photovoltaic cell;
the secondary air power generation unit comprises an air compressor, an air flow channel of a heat exchanger and an air turbine which are sequentially connected through an air pipeline; the air turbine is connected with the No. 1 generator set, and an air outlet of the air turbine is connected with a combustion air inlet of the combustion chamber; a flue gas outlet of the combustion chamber is connected with a flue gas flow passage of the heat exchanger, and flue gas in the flue gas flow passage heats air in an air flow passage in the heat exchanger;
the three-stage steam power generation unit comprises a waste heat boiler, a steam turbine, a condenser and a pump which are sequentially connected through medium pipelines to form circulation; wherein the steam turbine is connected with a No. 2 generator set; and a flue gas channel outlet of the heat exchanger is connected with a flue gas channel of the waste heat boiler, and flue gas in the flue gas channel heats a medium in the waste heat boiler to generate steam.
In a preferred embodiment of the present invention, the combustion chamber has an octagonal prism structure, the selective radiator is mounted on the outer wall of the combustion chamber in a covering manner, and the selective filter and the photovoltaic cell are arranged in parallel with the wall surface surrounding the combustor.
As a preferable scheme of the invention, the selective radiator is a rare earth oxide radiator or a metamaterial radiator; the selective filter is a periodic silicon/silicon oxide photonic crystal thin film type selective filter.
As a preferred scheme of the invention, the photovoltaic cell is a gallium antimonide photovoltaic cell; the cooling water channel is designed as a coiled pipe.
The invention also discloses a photo-thermal cascade power generation method of the power generation system by the combined cycle coupling of the thermophotovoltaic and the external combustion type fuel gas and steam, which comprises the following steps:
the fuel and the combustion-supporting air enter the combustor to be combusted, the fuel is combusted to generate high temperature to heat the wall surface of the combustor, the radiation energy obtains effective spectral radiation through the adjusting action of the selective radiator and the selective filter, and finally enters the photovoltaic cell to excite the photovoltaic cell to generate electricity, so that the thermophotovoltaic primary power production is realized; a cooling channel is arranged at the back of the photovoltaic cell for cooling so as to avoid the reduction of the cell efficiency caused by the temperature rise;
the air at the inlet of the air compressor enters the heat exchanger after being compressed by the air compressor, high-temperature flue gas from the combustion chamber heats high-pressure air through the heat exchanger, so that high-temperature high-pressure air is generated, and the air finally enters the air turbine to expand and do work to drive the No. 1 generator set to generate electricity, so that a secondary electricity generation effect is formed; the air at the outlet of the air turbine is introduced into the combustion chamber through the combustion-supporting air inlet to be used as a combustion improver to participate in combustion, so that an external combustion design is formed;
the medium-high temperature flue gas from the heat exchanger enters a waste heat boiler, the flue gas becomes exhaust gas after passing through the waste heat boiler, water from a water supply pump is heated in the waste heat boiler to form superheated steam, and finally the superheated steam enters a steam turbine to expand and do work to drive a No. 2 generator set to generate power, so that three-level power production is realized; the exhaust gas at the outlet of the steam turbine enters a condenser for condensation, then enters a water pump for compression and enters a waste heat boiler again to realize a complete cycle.
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
the invention utilizes the high-temperature energy generated by fuel combustion to the utmost extent, converts a section of high-temperature energy between the combustion high temperature and thermodynamic cycle parameters through a thermophotovoltaic technology, and can still ensure the conversion of thermodynamic cycle by the residual medium-high temperature energy, thereby realizing the energy gradient utilization more deeply.
The invention depends on the processes of one-time photovoltaic power generation and two-time thermal power generation, realizes three-stage conversion of photo-thermal energy on temperature gradient, and can effectively improve the system efficiency.
The invention adopts the external combustion type design, so that the thermophotovoltaic technology and the gas-steam combined cycle can be effectively combined, and the external combustion type combustion chamber can use various fuels including coal, biomass, fuel oil and gas, thereby having wider practicability.
The photo-thermal cascade power generation system adopting the combined cycle coupling of the thermophotovoltaic and the external combustion type fuel gas and steam can theoretically improve the system efficiency by 15-25 percent. The efficiency of the whole system is expected to be 75% breakthrough, which is undoubtedly a great breakthrough for the current most efficient combined cycle power generation technology.
Drawings
FIG. 1 is a photo-thermal cascade power generation system diagram with combined cycle coupling of thermophotovoltaic and external combustion gas and steam;
in the figure: the device comprises a combustion chamber 1, a photovoltaic cell 2, a cooling channel 3, a selective filter 4, a selective radiator 5, a combustor 6, a heat exchanger 7, a compressor 8, an air turbine 9, a waste heat boiler 10, a steam turbine 11, a condenser 12, a water pump 13, a No. 1 generating set 14, a No. 2 generating set 15, an air inlet 16, a fuel inlet 17, combustion air 18 and flue gas exhaust 19.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the thermophotovoltaic and external combustion type gas and steam combined cycle coupled photo-thermal cascade power generation system comprises a thermophotovoltaic power generation system, a combustion chamber 1, a secondary air power generation unit and a tertiary steam power generation unit;
the thermophotovoltaic power generation system comprises a photovoltaic cell 2, a cooling channel 3, a selective filter 4 and a selective radiator 5; the outer wall of the combustion chamber 1 is provided with a selective radiator 5, the photovoltaic cells 2 are arranged around the outer wall of the combustion chamber 1, and a selective filter 4 is arranged between the selective radiator 5 and the photovoltaic cells 2; the cooling channel 3 is arranged at the back of the photovoltaic cell 2;
the secondary air power generation unit comprises an air compressor 8, an air flow channel of the heat exchanger 7 and an air turbine 9 which are sequentially connected through an air pipeline; the air turbine 9 is connected with a No. 1 generator set, and an air outlet of the air turbine 9 is connected with a combustion air 18 inlet of the combustion chamber 1; a flue gas outlet of the combustion chamber 1 is connected with a flue gas channel of the heat exchanger 7, and flue gas in the flue gas channel heats air in an air channel in the heat exchanger 7;
the three-stage steam power generation unit comprises a waste heat boiler 10, a steam turbine 11, a condenser 12 and a pump which are sequentially connected through medium pipelines to form circulation; wherein, the steam turbine 11 is connected with a No. 2 generator set; and a flue gas channel outlet of the heat exchanger 7 is connected with a flue gas channel of the waste heat boiler 10, and flue gas in the flue gas channel heats a medium in the waste heat boiler 10 to generate steam.
In one embodiment of the invention, the compressor 8, the air turbine 9 and the No. 1 generator set are coaxially connected; the steam turbine 11 and the No. 2 generator set are coaxially connected.
In one embodiment of the invention, the combustion chamber is in an octagonal prism structure, the outer wall of the combustion chamber is covered and provided with a selective radiator, and the selective filter and the photovoltaic cell are arranged in parallel with the wall surface surrounding the combustor. The combustion chamber and the combustor are made of high-temperature-resistant 316 stainless steel, the wall surface of the combustion chamber is parallel to the photovoltaic cell, the photovoltaic cell is a gallium antimonide cell with the cutoff wavelength of 1.8 mu m, and the matching parts of the photovoltaic cell also comprise a storage battery, a charge and discharge controller and other electricity storage devices. The selective radiator is a rare earth oxide radiator or a metamaterial radiator; the selective filter is a one-dimensional periodic silicon/silicon dioxide photonic crystal film type filter. By means of the adjusting action of the selective radiator and the selective filter, spectral radiation below 1.8 μm can be generated. The battery cooling channel is of a parallel plate structure, and the turbulence fins are arranged in the channel to improve the heat exchange strength. The cooling channel is connected with a cooling medium circulating system through a pipeline, the cooling medium is water, the cooling water channel is designed as a coiled pipe and is arranged on the back of the battery to keep the temperature of the battery between 20 and 30 ℃, so that high efficiency is kept, and the photoelectric efficiency of the gallium antimonide battery can reach about 0.6 to 0.9 aiming at spectral radiation below 1.8 mu m.
The fuel is burnt at high temperature in the combustion chamber to generate high temperature above 1600 ℃, the usable radiation ratio below 1.8um can reach 40.3 percent at the temperature, and the fuel can be matched with a gallium antimonide battery and has considerable utilization potential. The energy generated by combustion release is converted into high-temperature radiation energy through the radiator, the radiation energy finally enters the photovoltaic cell through the filter under the regulation action of the selective radiator and the selective filter, and effective spectral radiation is generated, so that the gallium antimonide photovoltaic cell is excited to generate electricity, and the thermophotovoltaic primary power production is realized. The back of the battery is provided with a cooling water channel, and the reduction of the battery efficiency caused by the temperature rise is avoided through water cooling.
The temperature of high-temperature flue gas from a combustion chamber is usually about 1000 ℃, high-pressure air is heated by a heat exchanger, inlet air (25 ℃, about 0.1 Mpa) of a compressor is compressed by the compressor and then heated by the heat exchanger, so that high-temperature high-pressure air (800-. Air (about 0.1 MPa) at the outlet of the air turbine is introduced into the combustion chamber through the air inlet to be used as a combustion improver to participate in combustion, so that a system external combustion type design is formed, and the system is suitable for various fuels including solid fuels such as coal, biomass and the like.
The medium-high temperature flue gas (about 600 ℃) from the heat exchanger 7 enters a waste heat boiler, the waste heat boiler can adopt the traditional boiler design technology, and the heating surface of the waste heat boiler comprises three parts, namely an economizer, an evaporator and a superheater. The flue gas of the waste heat boiler is changed into exhaust gas at about 150 ℃, water from the water supply pump is heated into superheated steam at about 400-500 ℃ in the waste heat boiler, and finally the superheated steam enters a steam turbine to expand and do work to drive a No. 2 generator set to generate power, so that the three-stage power production process is realized. The exhaust gas at the outlet of the steam turbine enters a condenser for condensation, then enters a water pump for compression and enters a waste heat boiler again to realize a complete cycle.
Aiming at the design of a photo-thermal cascade power generation system with combined cycle coupling of thermophotovoltaic and external combustion type fuel gas and steam, a combined cycle unit with the capacity of 480MW and the efficiency of 55% is used for calculation, and the fuel is natural gas. The photoelectric conversion efficiency after the selective radiator and the selective filter are adopted is set to be about 0.6-0.9, and the system efficiency can be theoretically improved by 15-25% by using the photo-thermal cascade power generation system with the combined cycle coupling of the thermophotovoltaic and the external combustion type fuel gas and steam. The efficiency of the whole system is expected to be 75% breakthrough, which is undoubtedly a great breakthrough for the current most efficient combined cycle power generation technology.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (10)
1. A photo-thermal cascade power generation system with combined cycle coupling of thermophotovoltaic and external combustion type fuel gas and steam is characterized by comprising a thermophotovoltaic power generation system, a combustion chamber, a secondary air power generation unit and a tertiary steam power generation unit;
the thermophotovoltaic power generation system comprises a photovoltaic cell, a cooling channel, a selective filter and a selective radiator; the selective radiator is arranged on the outer wall of the combustion chamber, the photovoltaic cell is arranged around the outer wall of the combustion chamber, and the selective filter is arranged between the selective radiator and the photovoltaic cell; the cooling channel is arranged at the back of the photovoltaic cell;
the secondary air power generation unit comprises an air compressor, an air flow channel of a heat exchanger and an air turbine which are sequentially connected through an air pipeline; the air turbine is connected with the No. 1 generator set, and an air outlet of the air turbine is connected with a combustion air inlet of the combustion chamber; a flue gas outlet of the combustion chamber is connected with a flue gas flow passage of the heat exchanger, and flue gas in the flue gas flow passage heats air in an air flow passage in the heat exchanger;
the three-stage steam power generation unit comprises a waste heat boiler, a steam turbine, a condenser and a pump which are sequentially connected through medium pipelines to form circulation; wherein the steam turbine is connected with a No. 2 generator set; and a flue gas channel outlet of the heat exchanger is connected with a flue gas channel of the waste heat boiler, and flue gas in the flue gas channel heats a medium in the waste heat boiler to generate steam.
2. The thermophotovoltaic and externally fired gas and steam combined cycle coupled photothermal cascade power generation system according to claim 1, wherein: the system adopts an external combustion type design, a combustor is arranged in the combustion chamber, and the combustion chamber can use coal, biomass, fuel oil or fuel gas; the combustion chamber and burner were made of 316 stainless steel.
3. The system according to claim 1, wherein the combustion chamber is an octagonal prism structure, the selective radiator is covered and installed on the outer wall of the combustion chamber, and the selective filter and the photovoltaic cell are arranged in parallel with the wall surface surrounding the combustor.
4. The thermophotovoltaic and externally fired gas and steam combined cycle coupled photothermal cascade power generation system according to claim 1 or 3, wherein the selective radiator is a rare earth oxide radiator or a metamaterial radiator; the selective filter is a periodic silicon/silicon oxide photonic crystal thin film type selective filter.
5. The thermophotovoltaic and external combustion gas and steam combined cycle coupled photothermal cascade power generation system according to claim 1 or 3, wherein the photovoltaic cells are gallium antimonide photovoltaic cells; the cooling water channel is designed as a coiled pipe.
6. The thermophotovoltaic and external combustion type gas and steam combined cycle coupled photothermal cascade power generation system according to claim 1 or 3, wherein the heat exchanger is a ceramic dividing wall type heat exchanger, and the flue gas and the air perform countercurrent heat exchange.
7. The thermophotovoltaic and external combustion gas and steam combined cycle coupled photothermal cascade power generation system according to claim 1, wherein the compressor, the air turbine and the generator set No. 1 are coaxially connected; the steam turbine is coaxially connected with the No. 2 generator set.
8. The photo-thermal cascade power generation method of the power generation system of claim 1, which is characterized in that the thermal photovoltaic and the external combustion type gas-steam combined cycle are coupled, and the method comprises the following steps:
the fuel and the combustion-supporting air enter the combustor to be combusted, the fuel is combusted to generate high temperature to heat the wall surface of the combustor, the radiation energy obtains effective spectral radiation through the adjusting action of the selective radiator and the selective filter, and finally enters the photovoltaic cell to excite the photovoltaic cell to generate electricity, so that the thermophotovoltaic primary power production is realized; a cooling channel is arranged at the back of the photovoltaic cell for cooling so as to avoid the reduction of the cell efficiency caused by the temperature rise;
the air at the inlet of the air compressor enters the heat exchanger after being compressed by the air compressor, high-temperature flue gas from the combustion chamber heats high-pressure air through the heat exchanger, so that high-temperature high-pressure air is generated, and the air finally enters the air turbine to expand and do work to drive the No. 1 generator set to generate electricity, so that a secondary electricity generation effect is formed; the air at the outlet of the air turbine is introduced into the combustion chamber through the combustion-supporting air inlet to be used as a combustion improver to participate in combustion, so that an external combustion design is formed;
the medium-high temperature flue gas from the heat exchanger enters a waste heat boiler, the flue gas becomes exhaust gas after passing through the waste heat boiler, water from a water supply pump is heated in the waste heat boiler to form superheated steam, and finally the superheated steam enters a steam turbine to expand and do work to drive a No. 2 generator set to generate power, so that three-level power production is realized; the exhaust gas at the outlet of the steam turbine enters a condenser for condensation, then enters a water pump for compression and enters a waste heat boiler again to realize a complete cycle.
9. The thermophotovoltaic and external combustion gas and steam combined cycle coupled photothermal cascade power generation method according to claim 8, wherein: the cooling medium of a cooling channel in the thermophotovoltaic power generation system is water, and the temperature of the photovoltaic cell is maintained between 20 and 30 ℃; the temperature of the air entering the air turbine is 800-; the high temperature flue gas temperature at the heat exchanger inlet is greater than 900 ℃.
10. The thermophotovoltaic and external combustion gas and steam combined cycle coupled photothermal cascade power generation method according to claim 8, wherein: the medium in the three-stage steam power generation unit is water/steam; the water is heated in the waste heat boiler to superheated steam of 400-500 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011295690.XA CN112412562B (en) | 2020-11-18 | 2020-11-18 | Photo-thermal cascade power generation system and method with combined cycle coupling of thermophotovoltaic and external combustion type fuel gas and steam |
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| CN113587202A (en) * | 2021-07-20 | 2021-11-02 | 浙江大学 | Self-maintaining heat supply system and method with complementation of solar energy and fuel gas |
| CN115013156A (en) * | 2022-06-27 | 2022-09-06 | 哈尔滨工业大学 | Near-field thermophotovoltaic power generation device for recovering waste heat of aircraft engine |
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