CN112145247A - Flexible and efficient power generation system and method for coupling solar energy and hydrogen energy organic Rankine cycle - Google Patents
Flexible and efficient power generation system and method for coupling solar energy and hydrogen energy organic Rankine cycle Download PDFInfo
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- CN112145247A CN112145247A CN202010761398.6A CN202010761398A CN112145247A CN 112145247 A CN112145247 A CN 112145247A CN 202010761398 A CN202010761398 A CN 202010761398A CN 112145247 A CN112145247 A CN 112145247A
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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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- 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
- F01K13/00—General layout or general methods of operation of complete plants
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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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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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
- F01K21/00—Steam engine plants 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
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/06—Devices for producing mechanical power from solar energy with solar energy concentrating means
- F03G6/065—Devices for producing mechanical power from solar energy with solar energy concentrating means having a Rankine cycle
- F03G6/067—Binary cycle plants where the fluid from the solar collector heats the working fluid via a heat exchanger
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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
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
Abstract
The invention discloses a flexible and efficient power generation system and method for coupling solar energy and hydrogen energy organic Rankine cycle, which belong to the technical field of multi-energy complementary power generation and comprise a disc type solar Stirling power generation system, a fuel cell power generation system and a waste heat utilization organic Rankine power generation system; the disc type solar Stirling power generation system comprises a disc type light gathering system and a Stirling generator, the fuel cell power generation system comprises an electrolytic water hydrogen production tank, hydrogen storage equipment and a fuel cell, and the waste heat utilization organic Rankine power generation system comprises an organic Rankine cycle flue gas heat source heat exchanger, an organic Rankine cycle expansion machine, a generator, an organic Rankine cycle heat regenerator, an organic Rankine cycle condenser, a liquid storage tank, a working medium pump and a cooling tower. The invention adopts three different working modes, can exert the solar power generation capacity to the maximum extent, ensures the stability and the continuity of system power supply and has great economic benefit.
Description
Technical Field
The invention relates to an organic Rankine cycle coupling power generation system utilizing solar energy, hydrogen energy and waste heat, and belongs to the technical field of multi-energy complementary power generation.
Background
At present, with the continuous deepening of the contradiction between energy and environment, solar energy is generally regarded as clean renewable energy in all countries in the world. However, due to the randomness and the fluctuation of solar illumination resources, the fluctuation of a large power grid is aggravated by solar large-scale grid-connected power generation, and the demand of power grid peak regulation is increased; meanwhile, the illumination resources are concentrated in the daytime, the large-scale solar grid-connected power generation amount exceeds the power load, but the large-scale solar grid-connected power generation cannot meet the power load at night when the power load is in high demand. The problems listed above lead to a large scale of light abandonment, resulting in a great waste of energy.
The hydrogen fuel cell has the advantages of cleanness, environmental protection, easy continuous hydrogen and oxygen supply, continuous current energy generation, less waste discharge, low noise and the like, and the hydrogen fuel cell is widely concerned by people in recent years. Because the fuel cell converts the Gibbs free energy in the chemical energy of the fuel into electric energy through electrochemical reaction, and is not limited by Carnot cycle effect, the generating efficiency is higher than that of the conventional prime motor, the theoretical generating efficiency can reach 85% -90%, the actual generating efficiency of the current fuel cell is about 40% -60%, and if the combined heat and power supply is realized, the total utilization rate of the fuel can reach more than 80%. How to utilize the low-grade heat source of the flue gas with the temperature of 100-150 ℃ discharged by the fuel cell is the key for improving the total utilization rate of the fuel.
The working principle of the organic Rankine cycle is the same as that of the traditional steam Rankine cycle, but the organic working medium is used for replacing steam. The organic Rankine cycle system can efficiently recover solar heat energy, low-temperature geothermal energy, biomass heat energy, industrial waste heat and other low-grade heat energy for power generation.
Disclosure of Invention
The invention aims to overcome the defects of the existing solar power generation, and provides a flexible power generation system for utilizing organic Rankine cycle by coupling solar energy, hydrogen energy and waste heat, which can utilize the solar energy to the maximum extent, realize the gradient utilization of energy and greatly increase the economic benefit and efficiency of the whole system.
The technical scheme adopted by the invention for solving the problems is as follows: a flexible and efficient power generation system coupled with a solar hydrogen energy organic Rankine cycle is characterized by comprising a disc type solar Stirling power generation system, a fuel cell power generation system and a waste heat utilization organic Rankine power generation system; the disc type solar Stirling power generation system comprises a disc type light gathering system and a Stirling generator, the fuel cell power generation system comprises an electrolytic water hydrogen production tank, hydrogen storage equipment and a fuel cell, and the waste heat utilization organic Rankine power generation system comprises an organic Rankine cycle flue gas heat source heat exchanger, an organic Rankine cycle expansion machine, a generator, an organic Rankine cycle heat regenerator, an organic Rankine cycle condenser, a liquid storage tank, a working medium pump and a cooling tower;
the disc type light-gathering system is connected with the Stirling generator, and gathers solar energy onto the Stirling generator to push the Stirling generator to operate and generate electricity; the Stirling generator is connected with the user side and the water electrolysis hydrogen production tank and provides electric power for the user side and the water electrolysis hydrogen production tank;
the hydrogen production tank for electrolyzing water, the hydrogen storage equipment and the fuel cell are sequentially connected, hydrogen obtained by electrolyzing water in the hydrogen production tank for electrolyzing water is temporarily stored by the hydrogen storage equipment, and the hydrogen is input to the fuel cell by the hydrogen storage equipment for chemical reaction power generation; the fuel cell is connected with the user side, and the fuel cell performs chemical reaction to generate power and transmits the power to the user side; meanwhile, a high-temperature flue gas outlet of the fuel cell is connected with an organic Rankine cycle flue gas heat source heat exchanger, and the high-temperature flue gas of the fuel cell exchanges heat with the organic working medium flowing through the organic Rankine cycle flue gas heat source heat exchanger to discharge low-temperature flue gas;
the organic Rankine cycle expansion machine, the generator and the user side are sequentially connected, the organic working medium is heated to an overheat state through the organic Rankine cycle flue gas heat source heat exchanger, the overheat working medium drives the generator to do work through the organic Rankine cycle expansion machine to generate power, and the generator generates power and transmits the power to the user side; the organic Rankine cycle expansion machine, the organic Rankine cycle heat regenerator and the organic Rankine cycle condenser are sequentially connected, and organic working media enter the organic Rankine cycle heat regenerator and then enter the organic Rankine cycle condenser to be condensed into a liquid state; the organic Rankine cycle condenser, the liquid storage tank, the working medium pump, the organic Rankine cycle heat regenerator and the organic Rankine cycle flue gas heat source heat exchanger are sequentially connected, liquid organic working medium enters the liquid storage tank for temporary storage, returns to the organic Rankine cycle heat regenerator after being pressurized by the working medium pump and finally returns to the organic Rankine cycle flue gas heat source heat exchanger to complete circulation, wherein the organic Rankine cycle heat regenerator preheats the liquid working medium behind the organic Rankine cycle condenser through the overheated organic working medium after acting; the organic Rankine cycle condenser is connected with the cooling tower.
Further, the hydrogen storage device is a high-pressure hydrogen storage steel cylinder.
Further, the fuel cell is a hydrogen fuel cell.
The working method of the flexible and efficient power generation system coupled with the solar hydrogen energy organic Rankine cycle is characterized by comprising the following three conditions:
when the illumination resource is sufficient and can meet the load of a user, the disc type solar Stirling power generation system generates power to be supplied to the user for use, and simultaneously, redundant power is used for electrolyzing water to prepare hydrogen and is stored in hydrogen storage equipment;
when no illumination resource exists, hydrogen is input into the fuel cell by the hydrogen storage equipment, and the chemical energy stored in the fuel and the oxidant is directly converted into electric energy by the fuel cell for the user to use; meanwhile, high-temperature flue gas discharged by the fuel cell enters an organic Rankine cycle flue gas heat source heat exchanger for heat exchange, and then is discharged as low-temperature flue gas, the organic Rankine cycle flue gas heat source heat exchanger heats the organic working medium to an overheated state by using the heat of the high-temperature flue gas, and the organic working medium is used for generating power by using an organic Rankine cycle expander and is supplied to a user;
when the illumination resource is unstable and cannot meet the load of a user, the power generated by the disc type solar Stirling power generation system is completely supplied to the user; meanwhile, hydrogen in the hydrogen storage equipment is input into the fuel cell through a pipeline to generate electricity and is supplied to an external load; the waste heat of the fuel cell is used for generating power by a waste heat utilization organic Rankine cycle power generation system and is supplied to an external load; the disc type solar Stirling power generation system, the fuel cell power generation system and the waste heat utilization organic Rankine power generation system are used for supplying loads in a coordinated mode, and the stability and the continuity of power supply of the system are guaranteed.
Compared with the prior art, the invention has the following advantages and effects:
1. in the traditional solar power generation technology, the problem of large-scale light abandonment is caused by the randomness and the fluctuation of solar energy light resources; the system adopts the electrolyzed water to prepare hydrogen to store redundant light resources, and simultaneously can convert the hydrogen into electric energy through the hydrogen fuel cell under the condition of insufficient light resources, and the electric energy and the solar energy form multi-energy complementary transmission to an external load, thereby improving the energy supply stability of the system.
2. According to the invention, the waste heat utilization organic Rankine cycle power generation system is used for efficiently recovering the low-quality heat source of the flue gas of the hydrogen fuel cell at the temperature of 100-150 ℃, so that the energy utilization rate is further improved.
3. The high-pressure hydrogen storage steel cylinder adopted in the invention has the advantages of energy density far higher than that of a storage battery, long maintenance period and less maintenance workload.
4. The three different working modes described in the invention can give full play to the solar power generation capacity to the maximum extent, ensure the stability and continuity of system power supply and have great economic benefit.
Drawings
FIG. 1 is a schematic workflow diagram of the present invention.
In the figure: the system comprises a disc type light condensing system 1, a Stirling generator 2, a water electrolysis hydrogen production tank 3, a hydrogen storage device 4, a fuel cell 5, an organic Rankine cycle flue gas heat source heat exchanger 6, an organic Rankine cycle expansion machine 7, a generator 8, an organic Rankine cycle heat regenerator 9, an organic Rankine cycle condenser 10, a liquid storage tank 11, a working medium pump 12, a cooling tower 13 and a user end 14.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Referring to fig. 1, a flexible and efficient power generation system coupled with a solar hydrogen energy organic rankine cycle includes a disc type solar stirling power generation system, a fuel cell power generation system and a waste heat utilization organic rankine power generation system; the disc type solar Stirling power generation system comprises a disc type light condensation system 1 and a Stirling generator 2, the fuel cell power generation system comprises an electrolytic water hydrogen production tank 3, a hydrogen storage device 4 and a fuel cell 5, and the waste heat utilization organic Rankine power generation system comprises an organic Rankine cycle flue gas heat source heat exchanger 6, an organic Rankine cycle expansion machine 7, a generator 8, an organic Rankine cycle heat regenerator 9, an organic Rankine cycle condenser 10, a liquid storage tank 11, a working medium pump 12 and a cooling tower 13;
the disc type light-gathering system 1 is connected with the Stirling generator 2, and the disc type light-gathering system 1 gathers solar energy onto the Stirling generator 2 to push the Stirling generator 2 to operate and generate electricity; the Stirling generator 2 is connected with the user end 14 and the water electrolysis hydrogen production tank 3, and the Stirling generator 2 provides electric power for the user end 14 and the water electrolysis hydrogen production tank 3;
the electrolytic water hydrogen production tank 3, the hydrogen storage device 4 and the fuel cell 5 are sequentially connected, hydrogen obtained by electrolyzing water in the electrolytic water hydrogen production tank 3 is temporarily stored by the hydrogen storage device 4, the hydrogen storage device 4 is a high-pressure hydrogen storage steel cylinder, the hydrogen storage device 4 inputs hydrogen to the fuel cell 5 to carry out chemical reaction power generation, and the fuel cell 5 is a hydrogen fuel cell; the fuel cell 5 is connected with the user terminal 14, and the fuel cell 5 performs chemical reaction to generate power and transmits the power to the user terminal 14; meanwhile, a high-temperature flue gas outlet of the fuel cell 5 is connected with the organic Rankine cycle flue gas heat source heat exchanger 6, and the high-temperature flue gas of the fuel cell 5 exchanges heat with the organic working medium flowing through the organic Rankine cycle flue gas heat source heat exchanger 6 to discharge low-temperature flue gas;
the organic Rankine cycle expansion machine 7, the generator 8 and the user end 14 are sequentially connected, the organic working medium is heated to an overheat state through the organic Rankine cycle flue gas heat source heat exchanger 6, the overheat working medium drives the generator 8 to do work through the organic Rankine cycle expansion machine 7 to generate power, and the generator 8 generates power and transmits the power to the user end 14; the organic Rankine cycle expansion machine 7, the organic Rankine cycle heat regenerator 9 and the organic Rankine cycle condenser 10 are sequentially connected, and organic working media enter the organic Rankine cycle heat regenerator 9 and then enter the organic Rankine cycle condenser 10 to be condensed into liquid; the organic Rankine cycle condenser 10, the liquid storage tank 11, the working medium pump 12, the organic Rankine cycle heat regenerator 9 and the organic Rankine cycle flue gas heat source heat exchanger 6 are sequentially connected, liquid organic working medium enters the liquid storage tank 11 for temporary storage, returns to the organic Rankine cycle heat regenerator 9 after being pressurized by the working medium pump 12 and finally returns to the organic Rankine cycle flue gas heat source heat exchanger 6 to complete circulation, wherein the organic Rankine cycle heat regenerator 9 preheats the liquid working medium behind the organic Rankine cycle condenser 10 through the overheated organic working medium after acting; the orc condenser 10 is connected to a cooling tower 13.
The working method comprises the following three conditions:
when the illumination resource is sufficient and can meet the load of a user, the disc type solar Stirling power generation system generates power to be supplied to the user, and simultaneously, redundant power is used for electrolyzing water to prepare hydrogen and is stored in the hydrogen storage equipment 4;
when no illumination resource exists, the hydrogen storage device 4 inputs hydrogen into the fuel cell 5, and the fuel cell 5 directly converts chemical energy stored in fuel and oxidant into electric energy for users to use; meanwhile, high-temperature flue gas discharged by the fuel cell enters the organic Rankine cycle flue gas heat source heat exchanger 6 for heat exchange, and then is discharged as low-temperature flue gas, the organic Rankine cycle flue gas heat source heat exchanger 6 heats the organic working medium to an overheated state by using the heat of the high-temperature flue gas, and the organic working medium is used for generating power by using the organic Rankine cycle expander 7 and supplying the power to a user;
when the illumination resource is unstable and cannot meet the load of a user, the power generated by the disc type solar Stirling power generation system is completely supplied to the user; meanwhile, hydrogen in the hydrogen storage device 4 is input into the fuel cell 5 through a pipeline to generate electricity and is supplied to an external load; the waste heat of the fuel cell 5 is generated by a waste heat utilization organic rankine cycle power generation system and supplied to an external load; the disc type solar Stirling power generation system, the fuel cell power generation system and the waste heat utilization organic Rankine power generation system are used for supplying loads in a coordinated mode, and the stability and the continuity of power supply of the system are guaranteed.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (4)
1. A flexible and efficient power generation system coupled with a solar hydrogen energy organic Rankine cycle is characterized by comprising a disc type solar Stirling power generation system, a fuel cell power generation system and a waste heat utilization organic Rankine power generation system; the disc type solar Stirling power generation system comprises a disc type light condensing system (1) and a Stirling generator (2), the fuel cell power generation system comprises a water electrolysis hydrogen production tank (3), hydrogen storage equipment (4) and a fuel cell (5), and the waste heat utilization organic Rankine power generation system comprises an organic Rankine cycle flue gas heat source heat exchanger (6), an organic Rankine cycle expansion machine (7), a generator (8), an organic Rankine cycle heat regenerator (9), an organic Rankine cycle condenser (10), a liquid storage tank (11), a working medium pump (12) and a cooling tower (13);
the disc type light-focusing system (1) is connected with the Stirling generator (2), and the disc type light-focusing system (1) focuses solar energy on the Stirling generator (2) to push the Stirling generator (2) to operate and generate electricity; the Stirling generator (2) is connected with the user end (14) and the water electrolysis hydrogen production tank (3), and the Stirling generator (2) provides power for the user end (14) and the water electrolysis hydrogen production tank (3);
the water electrolysis hydrogen production tank (3), the hydrogen storage equipment (4) and the fuel cell (5) are sequentially connected, hydrogen obtained by water electrolysis of the water electrolysis hydrogen production tank (3) is temporarily stored by the hydrogen storage equipment (4), and the hydrogen is input to the fuel cell (5) by the hydrogen storage equipment (4) for chemical reaction power generation; the fuel cell (5) is connected with a user end (14), and the fuel cell (5) performs chemical reaction to generate power and transmits the power to the user end (14); meanwhile, a high-temperature flue gas outlet of the fuel cell (5) is connected with the organic Rankine cycle flue gas heat source heat exchanger (6), and the high-temperature flue gas of the fuel cell (5) exchanges heat with the organic working medium flowing through the organic Rankine cycle flue gas heat source heat exchanger (6) to discharge low-temperature flue gas;
the organic Rankine cycle expansion machine (7), the generator (8) and the user side (14) are sequentially connected, the organic working medium is heated to an overheating state through the organic Rankine cycle flue gas heat source heat exchanger (6), the overheating working medium drives the generator (8) to do work and generate power through the organic Rankine cycle expansion machine (7), and the generator (8) generates power and transmits the power to the user side (14); the organic Rankine cycle expansion machine (7), the organic Rankine cycle heat regenerator (9) and the organic Rankine cycle condenser (10) are sequentially connected, and organic working media enter the organic Rankine cycle heat regenerator (9) and then enter the organic Rankine cycle condenser (10) to be condensed into a liquid state; the organic Rankine cycle condenser (10), the liquid storage tank (11), the working medium pump (12), the organic Rankine cycle heat regenerator (9) and the organic Rankine cycle flue gas heat source heat exchanger (6) are sequentially connected, liquid organic working medium enters the liquid storage tank (11) for temporary storage, returns to the organic Rankine cycle heat regenerator (9) after being pressurized by the working medium pump (12), and finally returns to the organic Rankine cycle flue gas heat source heat exchanger (6) to complete circulation, wherein the organic Rankine cycle heat regenerator (9) preheats the liquid working medium behind the organic Rankine cycle condenser (10) through the overheated organic working medium after acting; the organic Rankine cycle condenser (10) is connected with a cooling tower (13).
2. The flexible, efficient power generation system coupled solar hydrogen energy organic rankine cycle according to claim 1, characterized in that the hydrogen storage device (4) is a high pressure hydrogen storage cylinder.
3. The flexible, efficient power generation system coupling a solar hydrogen energy organic Rankine cycle according to claim 1, characterized in that the fuel cell (5) is a hydrogen fuel cell.
4. A method of operating a flexible and efficient power generation system coupled with a solar hydrogen energy organic Rankine cycle according to any one of claims 1 to 3, comprising the following three cases:
when the illumination resource is sufficient and can meet the load of a user, the disc type solar Stirling power generation system generates power to be supplied to the user, and simultaneously, redundant power is used for electrolyzing water to prepare hydrogen and is stored in the hydrogen storage equipment (4);
when no illumination resource exists, the hydrogen storage device (4) inputs hydrogen into the fuel cell (5), and the fuel cell (5) directly converts chemical energy stored in fuel and oxidant into electric energy for users to use; meanwhile, high-temperature flue gas discharged by the fuel cell enters an organic Rankine cycle flue gas heat source heat exchanger (6) for heat exchange, and then is discharged as low-temperature flue gas, the organic Rankine cycle flue gas heat source heat exchanger (6) heats the organic working medium to an overheat state by using the heat of the high-temperature flue gas, and the organic working medium is used for generating power by using an organic Rankine cycle expander (7) and supplying the power to a user for use;
when the illumination resource is unstable and cannot meet the load of a user, the power generated by the disc type solar Stirling power generation system is completely supplied to the user; meanwhile, hydrogen in the hydrogen storage device (4) is input into the fuel cell (5) through a pipeline to generate electricity and is supplied to an external load; the waste heat of the fuel cell (5) is generated by a waste heat utilization organic Rankine cycle power generation system and is supplied to an external load; the disc type solar Stirling power generation system, the fuel cell power generation system and the waste heat utilization organic Rankine power generation system are used for supplying loads in a coordinated mode, and the stability and the continuity of power supply of the system are guaranteed.
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| CN113074095A (en) * | 2021-03-29 | 2021-07-06 | 中国科学院理化技术研究所 | Solar energy and thermoacoustic power generation combined hydrogen production system |
| CN113411036A (en) * | 2021-07-13 | 2021-09-17 | 华北电力大学 | Comprehensive energy supply system based on solar energy frequency division utilization |
| CN114352367A (en) * | 2022-01-07 | 2022-04-15 | 北京石油化工学院 | Compound combined supply system based on natural gas reforming hydrogen production and fuel cell |
| CN114540856A (en) * | 2022-03-30 | 2022-05-27 | 中国华能集团清洁能源技术研究院有限公司 | Photo-thermal complementary hydrogen production device |
| JP2022105292A (en) * | 2020-12-31 | 2022-07-13 | レール・リキード－ソシエテ・アノニム・プール・レテュード・エ・レクスプロワタシオン・デ・プロセデ・ジョルジュ・クロード | System and method of recovering waste heat from electrolyte for generating power, by using organic rankine cycle |
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