CN111089001A - Solar-energy-based thermoelectric hydrogen multi-combined supply system - Google Patents
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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
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- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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- 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
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
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- F25B27/00—Machines, plants or systems, using particular sources of energy
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- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
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- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
A solar-energy-based thermoelectric hydrogen multi-combined supply system comprises a disc type solar concentrator, a solid oxide electrolytic tank, a proton exchange membrane fuel cell, a two-stage Rankine cycle, a heat exchanger, a humidifier, a cold water tank and a hot water tank, wherein the solid oxide electrolytic tank is a solid oxide electrolytic pile, the proton exchange membrane fuel cell is a proton exchange membrane fuel cell pile, the two-stage Rankine cycle is a combined use of a high-temperature Rankine cycle and a low-temperature Rankine cycle, and the system mainly comprises the heat exchanger, a pump, a condenser, a turbine and a flash evaporator. The solar-based thermoelectric hydrogen multi-combined-supply system utilizes the solar energy of the disc type solar condenser as a driving heat source, provides uninterrupted power, heating and hot water for users through Rankine cycle, water electrolysis and fuel cell power generation technologies, and realizes clean and efficient utilization of the solar energy. The invention is suitable for a distributed energy system, and further improves the utilization rate of the combined supply system while meeting the requirements of users on various energy sources.
Description
Technical Field
The invention relates to a combined heat, power and hydrogen supply system, in particular to a combined heat, power and hydrogen supply system based on solar energy.
Background
With the rapid increase of energy demand, the search for renewable energy sources to replace fossil fuels, the improvement of energy utilization efficiency, and the reduction of environmental pollution have become the current research focus. Solar energy plays an important role in sustainable development as a renewable energy source which is widely applied, clean in environment and friendly. The specific gravity of solar power generation in the structure of an electric power installation and the production of primary energy is increasing year by year. However, solar energy is influenced by time and climate, and electric energy is stored through a super capacitor and a storage battery, so that the energy density is low in the whole life cycle, the cost is high, and the generated electric energy cannot be fully utilized. Hydrogen is a renewable energy source with high energy density, cleanness, no pollution and easy storage and transportation, and is the current most potential energy carrier. The water electrolysis hydrogen production is a clean hydrogen production technology for directly converting water into hydrogen and oxygen through chemical reaction of an electrolytic cell, but the electricity required by electrolysis is generated by fossil fuel, so that the environment pollution is caused, and the hydrogen production technology is an unsustainable energy source.
The types of electrolytic cells mainly include proton exchange membrane electrolytic cells, alkaline electrolytic cells, solid oxidation electrolytic cells, and the like. At present, a low-temperature proton exchange membrane electrolytic cell is mostly adopted in an electrolytic hydrogen production system, the electrolytic efficiency is not high, the electrolytic efficiency of a high-temperature solid oxide electrolytic cell is high, and the electric energy required in the water electrolysis process can be effectively reduced under the high-temperature operation condition.
Disclosure of Invention
Aiming at the demands of a distributed energy system on heat, electricity and hydrogen, the invention aims to provide a multi-connected supply system based on solar energy, which combines electrolysis hydrogen production and solar power generation technologies while meeting various energy demands of users, can convert solar energy into hydrogen and store the hydrogen, and is an efficient energy conversion technology. Meanwhile, the characteristics of high power generation efficiency and high energy density of the fuel cell are combined, so that the high-efficiency utilization of solar energy can be realized, and the fuel cell has a good effect of improving and reducing environmental pollution. The energy utilization rate is improved, and the environmental pollution is reduced.
The heat collection temperature of the disc type solar condenser can reach 800-1000 ℃, the high-temperature operation condition of the solid oxide electrolytic cell can be met, and the electric energy consumed by water electrolysis is reduced. The system solves the problem of solar energy waste electricity, improves the solar energy utilization rate and realizes 24-hour uninterrupted combined heat and power supply.
The technical scheme adopted by the invention is as follows: a solar-energy-based thermoelectric hydrogen multi-combined supply system comprises a disc type solar concentrator, a solid oxide electrolytic tank, a two-stage Rankine cycle, a proton exchange membrane fuel cell, a humidifier, a heat exchanger, a hot water tank and a cold water tank. The disc type solar concentrator absorbs solar energy for heating electrolyzed water and thermal power generation of a two-stage Rankine cycle (water and R601); one part of the electricity generated by the double-stage Rankine cycle is used for supplying a load, and the other part of the electricity is used for producing hydrogen by electrolysis in a solid oxide electrolytic cell; the outlet of the cold water tank is divided into two parts, one part is introduced into the heat exchanger to absorb the waste heat generated in the power generation process of the proton exchange membrane fuel cell and enters the hot water tank, and the other part is used as a condensed working medium to recover the waste heat generated in the double-stage Rankine cycle process and enter the hot water tank; the hot water collected by the hot water tank has two purposes: the first is used as a heat source for supplying heat, and the second is used for providing electrolytic water for the electrolytic bath; the solid oxide electrolytic tank is a solid oxide electrolytic pile, hot water provided by the hot water tank enters the electrolytic pile after being heated by the heat exchanger, electrochemical reaction is carried out under the action of electric energy, oxygen and hydrogen are decomposed for storage, and meanwhile, the temperature for gas storage is reduced and undecomposed water vapor is recycled to enter the hot water tank under the action of cooling water from the cold water tank; the proton exchange membrane fuel cell is a proton exchange membrane fuel cell stack, hydrogen and oxygen enter the stack through the heating and humidifying of the humidifier to perform electrochemical reaction to generate electricity, water and waste heat, the waste heat is recovered by circulating cooling water of the stack, and the waste heat enters the humidifier to be used for heating and humidifying inlet gas and further exchanges heat with the heat exchanger.
The dish solar concentrator of the present invention mainly comprises three components: heat collector, spotlight reflector, supporting structure. The specific working principle is as follows: the solar radiation energy is focused and reflected to the heat collector at the focal position by the light-focusing reflector, and the heat collector absorbs the radiation energy and converts the radiation energy into heat energy for direct utilization.
The double-stage Rankine cycle adopted by the invention mainly comprises five components: the turbine, the condenser, the heat exchanger, the flash evaporator, and the pump are classified into a high-temperature rankine cycle (steam) and a low-temperature rankine cycle (R601). The working principle of the Rankine cycle is as follows: the working medium is compressed and pressurized in the pump, then is heated and vaporized through the heat exchanger until becoming superheated steam, then enters the turbine and completes work-applying power generation, wherein the working medium which is not vaporized is recovered by the flash evaporator and is vaporized again, the low-pressure steam after work-applying enters the condenser, and returns to the pump after being condensed, thereby completing one-time circulation. R601 is a low-boiling-point organic matter and is used as a circulating working medium of a low-temperature Rankine cycle.
A solar-based thermoelectric hydrogen multi-combined supply device comprises a solar condenser, an electrolytic cell, a two-stage Rankine cycle, a fuel cell, a humidifier, a heat exchanger, a hot water tank and a cold water tank; the solar condenser also comprises a heat collector, the heat collector is connected with the first heat exchanger and the outlet of the hot water tank, and the outlet of the cold water tank is divided into two parts: one part is connected with the hot water tank after passing through the third heat exchanger, and the other part is connected with the hot water tank after passing through the first condenser and the second condenser; the outlet of the hot water tank is connected with the electrolytic cell after passing through the heat collector. The outlet of the electrolytic cell is connected with the hydrogen tank and the oxygen tank after passing through the second heat exchanger. The hydrogen tank and the oxygen tank are connected with the humidifier. And the water inlet pipeline from the cold water tank passes through the second heat exchanger and then is converged with the water return pipeline to be connected with the hot water tank together. The proton exchange membrane fuel cell's circulating water cooling pipeline link to each other with the humidifier, the export of humidifier divide into two parts: the first is connected with the proton exchange membrane fuel cell, and the second is connected with the proton exchange membrane fuel cell after passing through the heat exchanger.
The two-stage Rankine cycle comprises a turbine, a condenser, a heat exchanger, a flash evaporator and a pump; the method comprises the steps of dividing high-temperature Rankine cycle and low-temperature Rankine cycle, compressing and boosting working media in a pump, heating and vaporizing the working media through a heat exchanger until the working media become superheated steam, entering a turbine and completing work-applying power generation, wherein the working media which are not vaporized are recovered by a flash evaporator and are vaporized again, entering a condenser through low-pressure steam after work-applying, returning the working media to the pump after condensation, and completing one cycle.
The multi-combined-supply system based on solar energy adopts an energy gradient utilization principle, utilizes the solar energy of the disc type solar condenser as a driving heat source, and provides uninterrupted power, heating and hot water for users through water electrolysis hydrogen production, two-stage Rankine cycle and fuel cell power generation technologies, so that clean and efficient utilization of the solar energy is realized. The energy utilization rate of the combined supply system under the working condition of high radiation intensity can reach 44%, and the hydrogen production efficiency can reach 35%. In addition, in the working process of the combined supply system, solar energy is used as the only energy input (without external electric energy), the emission is only water and waste heat, and no pollutants such as greenhouse gases are emitted, so that the combined supply system has remarkable advantages in the aspect of environmental protection.
(1) The heat collection temperature of the disc type solar condenser can well meet the requirement of the solid oxide electrolytic cell on high-temperature operation conditions. The solid oxide electrolytic cell can greatly reduce the electric energy required in the water electrolysis process under the condition of high temperature, has the electrolysis efficiency far higher than that of other electrolytic cells, and can also recover the waste heat for preheating the electrolyzed water and providing heat.
(2) The proton exchange membrane fuel cell is not limited by Carnot cycle, and the generating efficiency is higher than that of the traditional power device and other fuel cells. Meanwhile, the waste heat generated by the operation of the fuel cell is recovered and is further used for heat supply and air intake treatment.
(3) In the two-stage Rankine cycle, the low-temperature Rankine cycle heats the R601 working medium by using the low-pressure steam generated after the high-temperature Rankine cycle turbine works to generate power, so that the heat energy is reused, and the power generation efficiency of the system is improved. Meanwhile, the heat energy in the hot water tank can also be used as a heat source for supplying heat to the system, so that the heat utilization rate of the system is improved.
(4) The invention is suitable for the combined heat, power and hydrogen supply system in the distributed energy. The disc type solar condenser is used for absorbing solar energy in daytime for heating of electrolyzed water and double-stage Rankine cycle power generation, one part of generated electric energy is supplied to a load, the other part of generated electric energy is supplied to a solid oxide electrolytic cell for hydrogen production through electrolysis, and the power generation is performed by using hydrogen through a proton exchange membrane fuel cell at night to supply the load. The waste heat generated in the processes of hydrogen production by water electrolysis, two-stage Rankine cycle and fuel cell power generation is absorbed for heat supply, the utilization rate of solar energy is improved, various energy requirements of users are met, environmental pollution is reduced, and 24-hour uninterrupted heat and power combined supply is realized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure, 101, a light-collecting reflector; 102. a heat collector; 103. a solid oxide electrolytic cell; 104. a water inlet pipe; 105. a hot water tank; 106. a first pump; 107. a first condenser; 108. a first heat exchanger; 109. a flash recovery pipeline; 110. a flash evaporator; 111. a first turbine; 112. a water recovery pipeline; 113. a second heat exchanger; 114. an oxygen tank; 115. a hydrogen tank; 116. a humidifier; 117. a circulating water cooling pipeline; 118. proton exchange membrane fuel cells; 119. a third heat exchanger; 120. a cold water tank; 121. a second condenser; 122. a condensing duct; 123. a second pump; 124. a fourth heat exchanger; 125. a second turbine.
FIG. 2 is an efficiency graph showing the effect of collector collection temperature on system efficiency. As the temperature increases, the efficiency reaches a limit around 1073K, because the heat loss increases due to the increase of the temperature, and the electrolytic efficiency increases and the consumed electric energy decreases.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, the present invention is a solar-based cogeneration system, which includes a light-collecting reflector 101, a heat collector 102, a solid oxide electrolysis tank 103, a water inlet pipe 104, a hot water tank 105, a first pump 106, a first condenser 107, a first heat exchanger 108, a flash evaporation recovery pipe 109, a flash evaporator 110, a first turbine 111, a recovery water pipe 112, a second heat exchanger 113, an oxygen tank 114, a hydrogen tank 115, a humidifier 116, a circulating water cooling pipe 117, a proton exchange membrane fuel cell 118, a third heat exchanger 119, a cold water tank 120, a second condenser 121, a condensation pipe 122, a second pump 123, a fourth heat exchanger 124, and a second turbine 125. The dish-type solar concentrator mainly comprises a concentrating reflector 101 and a heat collector 102, wherein the concentrating reflector 101 focuses solar energy in the heat collector 102, and the heat collector 102 is connected with a first heat exchanger 108 and an outlet of a hot water tank 105. The double-stage Rankine cycle comprises the following steps: in a primary Rankine cycle (high-temperature Rankine cycle), the outlet of the first pump 107 is connected with a first heat exchanger 108, the outlet of the first heat exchanger 108 is connected with a flash evaporator 110, the outlet of the flash evaporator 110 is respectively connected with a first pump 106 and a first turbine 111, the outlet of the first turbine 111 passes through a fourth heat exchanger 124 and then is connected with a first cooling condenser 107, and the outlet of the first cooling condenser 107 is connected with the first pump 106; in a two-stage rankine cycle (low-temperature rankine cycle), the outlet of the second pump 123 is connected to a second turbine 125 after passing through a fourth heat exchanger 124, the outlet of the second turbine 125 is connected to a second condenser 121, and the outlet of the second condenser 121 is connected to the second pump 123. The outlet of the cold water tank 120 is divided into two parts: one part is connected with the hot water tank 105 after passing through the third heat exchanger 119, and the other part is connected with the hot water tank 105 after passing through the first condenser 107 and the second condenser 121. The outlet of the hot water tank 112 is connected with the electrolytic cell 103 after passing through the heat collector 102. The outlet of the electrolytic cell 103 is connected with a hydrogen tank 115 and an oxygen tank 114 through a second heat exchanger 113. The hydrogen tank 115 and the oxygen tank 114 are connected to a humidifier 116. The water inlet pipe 104 from the cold water tank 120 passes through the second heat exchanger 113 and then joins with the water return pipe 112 to be connected with the hot water tank 105. The circulating water cooling pipeline of the proton exchange membrane fuel cell 118 is connected with the humidifier 116, and the outlet of the humidifier 116 is divided into two parts: the first is connected with the proton exchange membrane fuel cell 118, and the second is connected with the proton exchange membrane fuel cell 118 after passing through the heat exchanger 119.
The solid oxide electrolysis pile is formed by connecting 75-100 single solid oxide electrolysis cells in series, the power is 25-30 KW, the operating temperature is 800-900 ℃, the excess coefficient of electrolyzed water is 1.25, the proton exchange membrane fuel cell pile is formed by connecting 75-100 single proton exchange membrane fuel cells in series, the power is 5-7 KW, the working temperature is 75-85 ℃, the excess coefficient of hydrogen and oxygen is 1.15, and the cooling mode adopts water cooling.
The specific working principle is as follows:
as shown in fig. 1, a dish-type solar concentrator focuses solar energy by using a concentrating reflector 101, and the solar energy is absorbed by a heat collector 102, a part of absorbed energy is used for heating hot water from a hot water tank 105, and another part of absorbed energy exchanges heat through a heat exchanger 108, so that heating of a high-temperature rankine cycle working medium (water) is realized; working process of high-temperature Rankine cycle: the working medium (water) is compressed and boosted in the first pump 106, then is heated and vaporized by the first heat exchanger 108 until becoming superheated steam, then enters the first turbine 111 to do work and generate power, wherein the working medium which is not vaporized is recovered by the flash evaporator 110 to be vaporized again, the low-pressure steam which does work has higher temperature, then enters the first condenser 107 to exchange heat by the fourth heat exchanger 124, and returns to the first pump 106 after being condensed, thus completing one cycle; the working process of the low-temperature Rankine cycle comprises the following steps: the working medium (R601) is compressed and boosted in the second pump 123, then is heated and vaporized through the fourth heat exchanger 124, enters the second turbine 125 to do work and generate power, enters the second condenser 121, is condensed and returns to the second pump 123 to complete a cycle; a part of the electric energy generated by the two-stage Rankine cycle is supplied to a load, and the other part of the electric energy is supplied to the solid oxide electrolytic cell 103; the outlet of the cold water tank 120 is divided into two parts, one part of the cold water tank enters the hot water tank 105 after absorbing the waste heat generated in the power generation process of the proton exchange membrane fuel cell 118 through the third heat exchanger 119, the other part of the cold water tank is used as the condensed working medium of the first condenser 107 and the second condenser 121, and the waste heat generated in the double-stage Rankine cycle process is recovered and enters the hot water tank 105; the hot water collected by the hot water tank 105 has two purposes, namely, the hot water is used as a heat source for supplying heat, and the hot water is used for providing electrolytic water for the electrolytic cell 103; the solid oxide electrolytic cell 103 is a solid oxide electrolytic pile, hot water provided by a hot water tank 105 enters the electrolytic cell 103 after being heated by a heat collector 102, an electrochemical reaction is carried out under the action of electric energy, the water is decomposed into hydrogen and oxygen and is stored in a hydrogen tank 115 and an oxygen tank 114, before storage, the temperature of the hydrogen and the oxygen is reduced through heat exchange of a second heat exchanger 113 under the action of cooling water 104 from a cold water tank, unreacted water vapor is recovered through a recovery water pipeline 112, and the cooling water after heat exchange and the unreacted water vapor enter the hot water tank 105 together; the pem fuel cell 118 is a pem fuel cell stack, hydrogen and oxygen are heated and humidified under the action of the humidifier 116 to enter the pem fuel cell stack 118, electrochemical reaction occurs to generate electricity and waste heat, the electric energy is supplied to a load, the waste heat is recovered by the circulating cooling water 117 of the stack, and the electricity and waste heat enter the humidifier 116 to be used for heating and humidifying the inlet gas, and then heat exchange is performed through the third heat exchanger 119.
(1) The heat collection temperature of the disc type solar condenser can well meet the requirement of the solid oxide electrolytic cell on high-temperature operation conditions, and the electric energy required in the water electrolysis process is greatly reduced. The electrolytic efficiency of the solid oxidation electrolytic cell is far higher than that of other electrolytic cells, and simultaneously, the solid oxidation electrolytic cell can also recover waste heat and is used for preheating electrolytic water and providing heat.
(2) The proton exchange membrane fuel cell is not limited by Carnot cycle, and the generating efficiency is higher than that of the traditional power plant and other fuel cells. Meanwhile, the waste heat generated by the operation of the fuel cell is recovered and is further used for heat supply and air intake treatment.
(3) In the two-stage Rankine cycle, the low-temperature Rankine cycle heats the R601 working medium by using the low-pressure steam generated after the high-temperature Rankine cycle turbine works to generate power, so that the heat energy is reused, and the power generation efficiency of the system is improved. Meanwhile, the heat energy in the hot water tank can also be used as a heat source for heating the R601 working medium, so that the heat utilization rate of the system is improved.
(4) In the daytime, a disc type solar concentrator is used for absorbing solar energy for heating electrolyzed water and generating power by a two-stage Rankine cycle, one part of generated electric energy is supplied to a load, and the other part of generated electric energy is supplied to a solid oxide electrolytic cell for hydrogen production by electrolysis; the load is supplied with electricity generated by the stored hydrogen through the proton exchange membrane fuel cell at night. The waste heat generated in the processes of hydrogen production by water electrolysis, two-stage Rankine cycle and fuel cell power generation is absorbed for heat supply, the utilization rate of solar energy is improved, various energy requirements of users are met, environmental pollution is reduced, and 24-hour uninterrupted combined heat and power supply is realized.
Finally, it should be noted that: the above embodiments are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A solar-energy-based thermoelectric hydrogen multi-combined supply device is characterized by comprising a solar concentrator, an electrolytic tank, a two-stage Rankine cycle, a fuel cell, a humidifier, a heat exchanger, a hot water tank and a cold water tank; the solar condenser also comprises a heat collector, the heat collector is connected with the first heat exchanger and the outlet of the hot water tank, and the outlet of the cold water tank is divided into two parts: one part is connected with the hot water tank after passing through the third heat exchanger, and the other part is connected with the hot water tank after passing through the first condenser and the second condenser; the outlet of the hot water tank is connected with the electrolytic cell after passing through the heat collector. The outlet of the electrolytic cell is connected with the hydrogen tank and the oxygen tank after passing through the second heat exchanger. The hydrogen tank and the oxygen tank are connected with the humidifier. And the water inlet pipeline from the cold water tank passes through the second heat exchanger and then is converged with the water return pipeline to be connected with the hot water tank together. The proton exchange membrane fuel cell's circulating water cooling pipeline link to each other with the humidifier, the export of humidifier divide into two parts: the first is connected with the proton exchange membrane fuel cell, and the second is connected with the proton exchange membrane fuel cell after passing through the heat exchanger.
The two-stage Rankine cycle comprises a turbine, a condenser, a heat exchanger, a flash evaporator and a pump; the method comprises the steps of dividing high-temperature Rankine cycle and low-temperature Rankine cycle, compressing and boosting working media in a pump, heating and vaporizing the working media through a heat exchanger until the working media become superheated steam, entering a turbine and completing work-applying power generation, wherein the working media which are not vaporized are recovered by a flash evaporator and are vaporized again, entering a condenser through low-pressure steam after work-applying, returning the working media to the pump after condensation, and completing one cycle.
2. The solar-based cogeneration system of claim 1, wherein: the heat collection temperature of the disc type solar energy is 750-950 ℃, the circulating working medium uses sodium, and the heat utilization rate of the disc type solar energy reaches 70%.
3. The solar-based cogeneration system of claim 1, wherein: the solid oxide electrolytic cell is a solid oxide electrolytic pile and is formed by connecting 75-100 single solid oxide electrolytic cells in series, the working power is 25-30 KW, the working temperature is 800-900 ℃, and the excess coefficient of water is 1.25.
4. The solar-based cogeneration system of claim 1, wherein: the proton exchange membrane fuel cell is a proton exchange membrane fuel cell stack and is formed by connecting 75-100 single proton exchange membrane fuel cells in series, the working power is 5-7 KW, the working temperature is 75-85 ℃, and the excess coefficient of hydrogen and oxygen is 1.15.
5. The solar-based cogeneration system of claim 1, wherein: the proton exchange membrane fuel cell comprises an internal cooling circulation subsystem, wherein one part of heat generated by reaction of the internal cooling circulation subsystem is used for preheating and humidifying hydrogen and oxygen entering a galvanic pile, and the other part of heat is exchanged by a heat exchanger to recover excessive heat energy.
6. The solar-based cogeneration system of claim 1, wherein: the working medium of the two-stage Rankine cycle is water and R601.
7. The solar-based cogeneration system of claim 1, wherein: the solar condenser is a disc type solar condenser, and the electrolytic bath is a solid oxide electrolytic bath.
8. The solar-based cogeneration system of claim 7, wherein: the dish type solar concentrator comprises a heat collector, a concentrating reflector and a support structure.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145247A (en) * | 2020-07-31 | 2020-12-29 | 华电电力科学研究院有限公司 | Flexible and efficient power generation system and method for coupling solar energy and hydrogen energy organic Rankine cycle |
| 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 |
| CN113340008A (en) * | 2021-06-02 | 2021-09-03 | 上海毅镤新能源科技有限公司 | Multi-connection supply system based on solar energy and biomass energy |
| CN113839419A (en) * | 2021-11-01 | 2021-12-24 | 西部金属材料股份有限公司 | System combining electrolytic magnesium production and clean energy power generation and energy storage |
| CN116317175A (en) * | 2023-02-21 | 2023-06-23 | 华北电力大学 | Solar-driven RSOC distributed poly-generation system and co-generation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003227315A (en) * | 2002-02-06 | 2003-08-15 | Takeo Saito | Solar organic rankine cycle (orc) system |
| CN101635538A (en) * | 2009-08-05 | 2010-01-27 | 深圳市中科力函热声技术工程研究中心有限公司 | Solar power generating system and solar hydrogen energy storage device |
| US20110209474A1 (en) * | 2008-08-19 | 2011-09-01 | Waste Heat Solutions Llc | Solar thermal power generation using multiple working fluids in a rankine cycle |
| CN108039852A (en) * | 2017-12-06 | 2018-05-15 | 武汉地质资源环境工业技术研究院有限公司 | A kind of Hydrogen Energy and the cogeneration system and its method of work of solar energy complementation |
-
2019
- 2019-12-31 CN CN201911414379.XA patent/CN111089001A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003227315A (en) * | 2002-02-06 | 2003-08-15 | Takeo Saito | Solar organic rankine cycle (orc) system |
| US20110209474A1 (en) * | 2008-08-19 | 2011-09-01 | Waste Heat Solutions Llc | Solar thermal power generation using multiple working fluids in a rankine cycle |
| CN101635538A (en) * | 2009-08-05 | 2010-01-27 | 深圳市中科力函热声技术工程研究中心有限公司 | Solar power generating system and solar hydrogen energy storage device |
| CN108039852A (en) * | 2017-12-06 | 2018-05-15 | 武汉地质资源环境工业技术研究院有限公司 | A kind of Hydrogen Energy and the cogeneration system and its method of work of solar energy complementation |
Non-Patent Citations (1)
| Title |
|---|
| 刘骞等: "一种基于太阳能的热-电-氢多联供系统的", 《湖南理工学院学报(自然科学版)》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145247A (en) * | 2020-07-31 | 2020-12-29 | 华电电力科学研究院有限公司 | Flexible and efficient power generation system and method for coupling solar energy and hydrogen energy organic Rankine cycle |
| 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 |
| CN113074095B (en) * | 2021-03-29 | 2022-04-22 | 中国科学院理化技术研究所 | Solar energy and thermoacoustic power generation combined hydrogen production system |
| CN113340008A (en) * | 2021-06-02 | 2021-09-03 | 上海毅镤新能源科技有限公司 | Multi-connection supply system based on solar energy and biomass energy |
| CN113839419A (en) * | 2021-11-01 | 2021-12-24 | 西部金属材料股份有限公司 | System combining electrolytic magnesium production and clean energy power generation and energy storage |
| CN116317175A (en) * | 2023-02-21 | 2023-06-23 | 华北电力大学 | Solar-driven RSOC distributed poly-generation system and co-generation method thereof |
| CN116317175B (en) * | 2023-02-21 | 2024-01-23 | 华北电力大学 | Solar-driven RSOC distributed poly-generation system and co-generation method thereof |
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