CN105840442A - Complementary type supercritical carbon dioxide and organic Rankin union power generation system and method - Google Patents

Complementary type supercritical carbon dioxide and organic Rankin union power generation system and method Download PDF

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Publication number
CN105840442A
CN105840442A CN201610316968.4A CN201610316968A CN105840442A CN 105840442 A CN105840442 A CN 105840442A CN 201610316968 A CN201610316968 A CN 201610316968A CN 105840442 A CN105840442 A CN 105840442A
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China
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temperature
heat
supercritical carbon
low
working medium
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CN105840442B (en
Inventor
高炜
杨玉
李红智
姚明宇
张立欣
张纯
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Xian Thermal Power Research Institute Co Ltd
Huaneng Group Technology Innovation Center Co Ltd
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Xian Thermal Power Research Institute Co Ltd
Huaneng Group Technology Innovation Center Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K11/00Plants characterised by the engines being structurally combined with boilers or condensers
    • F01K11/02Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08Plants 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
    • F01K25/10Plants 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 the vapours being cold, e.g. ammonia, carbon dioxide, ether
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01KSTEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/08Plants 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
    • F01K25/10Plants 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 the vapours being cold, e.g. ammonia, carbon dioxide, ether
    • F01K25/103Carbon dioxide
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03GSPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G6/00Devices for producing mechanical power from solar energy
    • F03G6/06Devices for producing mechanical power from solar energy with solar energy concentrating means
    • F03G6/065Devices for producing mechanical power from solar energy with solar energy concentrating means having a Rankine cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03GSPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
    • F03G6/00Devices for producing mechanical power from solar energy
    • F03G6/06Devices for producing mechanical power from solar energy with solar energy concentrating means
    • F03G6/065Devices for producing mechanical power from solar energy with solar energy concentrating means having a Rankine cycle
    • F03G6/067Binary cycle plants where the fluid from the solar collector heats the working fluid via a heat exchanger
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S60/00Arrangements for storing heat collected by solar heat collectors
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/46Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines

Abstract

The invention discloses a complementary type supercritical carbon dioxide and organic Rankin union power generation system and a complementary type supercritical carbon dioxide and organic Rankin union power generation method. Outlets of a solar heat collector and a boiler communicate with a supercritical carbon dioxide working medium inlet of a supercritical carbon dioxide Brayton cycle system; a supercritical carbon dioxide working medium outlet of the supercritical carbon dioxide Brayton cycle system communicates with inlets of the solar heat collector and the boiler; a heat conduction oil outlet of the supercritical carbon dioxide Brayton cycle system communicates with the high temperature end of a low- and medium-temperature heat accumulation system and a heat conduction oil inlet of a low- and medium-temperature organic Rankin cycle system; the low temperature end of the low- and medium-temperature heat accumulation system and a heat conduction oil outlet of the low- and medium-temperature organic Rankin cycle system communicate with a heat conduction oil inlet of the supercritical carbon dioxide Brayton cycle system. The complementary type supercritical carbon dioxide and organic Rankin union power generation system can realize seasonal and continuously shady and rainy high-capacity heat energy adjustment.

Description

The supercritical carbon dioxide of complementary type and organic Rankine combined generating system and method
Technical field
The present invention relates to a kind of combined generating system and method, be specifically related to the super of a kind of complementary type and face Boundary's carbon dioxide and organic Rankine combined generating system and method.
Background technology
Solar energy is a kind of inexhaustible clean energy resource, but solar energy not only also exists Day amount of radiation cyclically-varying, there is also amount of radiation seasonal variety, the most at any time can be by wet weather Impact etc. weather conditions.Relatively inexpensive thermal storage and energy accumulation can be used in theory to solve too at present Sun can the uneven problem of the diurnal distribution, this is also one of the considerable advantage of solar light-heat power-generation, but Thermodynamic cycle is wished to improve the thermal efficiency by raising maximum cycle temperature, and along with maximum temperature Improving regenerator temperature also to improve constantly, this gives heat-storing material, hold over system container, Insulation etc. All bring bigger difficulty.If can reduce and store while keeping thermodynamic cycle higher temperature Hot temperature then can reduce system design and the difficulty run.
Additionally when continuous rainy weather and solar radiation seasonal variety, the tune of hold over system Save limited in one's ability, it may be difficult to meet heating demand.And fossil energy can supplement continuous depletion of YANG completely The heat of light time is blank, it is possible to supplement the solar radiation caused by seasonal variations the most not enough, with Time the heat that provides of fossil energy be easily controlled, when there is unstable fluctuation in solar radiation heat, The heat that fossil energy provides can make the electricity generation system can be true as effective heat control measures Just realizing operating steady in a long-term.
Coal, sky can be included as the not enough or continuous fossil energy without solar irradiation of supplementary solar irradiation So multiple fossil energy such as gas, oil.Boiler with this kind of fossil energy as fuel and electricity generation system are Through highly developed, the most common thermal power station's boiler etc., this kind of system can reach flexible modulation And smooth long term running, easily realize the regulation of additional heat simultaneously, just can make up the sun The defect that energy radiations heat energy is unstable.
Photo-thermal power generation needs to realize thermo-electric conversion by thermodynamic cycle, works as in numerous thermodynamic cycles at present In, supercritical Brayton cycle is a kind of circulation form having superiority most.Novel carbon dioxide is super to be faced The innate advantages such as it is big that boundary's working medium has energy density, and heat transfer efficiency is high, and system is simple, can be significantly Improve heat to power output efficiency, reduce equipment volume, there is the highest economy, be to substitute existing water The optimum selection of steam circulation system, is also the trend of following heat and power system development.
But only with the energy storage modes such as accumulation of heat realize the system of energy adjustment cannot realize seasonal with And the regulation of the continuous Large Copacity heat energy such as overcast and rainy, and energy round the clock can only be realized in little scope Regulation, only the most fully realizes using solar energy as the electricity generation system of low-temperature prewarming part auxiliary thermal source The value of solar energy high-grade energy, and the fossil energy large percentage consumed, be provided without accumulation of heat and The solar power system supplemented only with fossil energy, equally exists fossil energy this consumption ratio Excessive shortcoming.
Summary of the invention
It is an object of the invention to the shortcoming overcoming above-mentioned prior art, it is provided that a kind of complementary type Supercritical carbon dioxide and organic Rankine combined generating system and method, this system and method can be real Seasonal and the most overcast and rainy existing Large Copacity Thermoregulation, and fossil energy this consumption ratio is less.
For reaching above-mentioned purpose, the supercritical carbon dioxide of complementary type of the present invention and organic bright Willing combined generating system include solar thermal collector, boiler, carbon dioxide Brayton Cycle system, Middle low-temperature heat accumulating system and middle low temperature organic rankine cycle system;
The outlet of solar thermal collector and the outlet of boiler all with supercritical carbon dioxide Brayton cycle The supercritical carbon dioxide working medium entrance of system is connected, supercritical carbon dioxide Brayton cycle system The supercritical carbon dioxide sender property outlet of system is connected with the entrance of solar thermal collector and the entrance of boiler Logical, conduction oil outlet and the middle low-temperature heat accumulating system of supercritical carbon dioxide Brayton Cycle system The conduction oil entrance of temperature end and middle low temperature organic rankine cycle system is connected, middle low-temperature heat accumulating system The low-temperature end of system and the conduction oil of middle low temperature organic rankine cycle system export and supercritical carbon dioxide The conduction oil entrance of Brayton Cycle system is connected;
The temperature end of middle low-temperature heat accumulating system and the conduction oil entrance of middle low temperature organic rankine cycle system It is connected, the low-temperature end of middle low-temperature heat accumulating system and the conduction oil of middle low temperature organic rankine cycle system Outlet is connected.
Supercritical carbon dioxide Brayton Cycle system includes carbon dioxide turbine, carbon dioxide backheat Device, precooler and compressor, the outlet of solar thermal collector and the outlet of boiler are saturating with carbon dioxide Flat entrance is connected, the outlet of carbon dioxide turbine and the cold side entrance of carbon dioxide regenerator Being connected, the cold side outlet of carbon dioxide regenerator is connected with the cold side entrance of precooler, The cold side outlet of precooler is connected with the entrance of compressor, the outlet of compressor and carbon dioxide The heat absorbing side entrance of regenerator is connected, heat absorbing side outlet and the solar energy collection of carbon dioxide regenerator The entrance of hot device is connected with the entrance of boiler;
The heat absorbing side outlet of precooler and the temperature end of middle low-temperature heat accumulating system and middle low temperature organic Rankine The conduction oil entrance of blood circulation is connected, and low-temperature end and the middle low temperature of middle low-temperature heat accumulating system are organic The conduction oil outlet of Rankine cycle system is connected with the heat absorbing side entrance of precooler.
Described middle low temperature organic rankine cycle system includes heater, organic working medium turbine, You Jigong Matter regenerator and condenser, the working medium side outlet of heater is connected with the entrance of organic working medium turbine, The outlet of organic working medium turbine is connected with the cold side entrance of organic working medium regenerator, organic working medium The cold side outlet of regenerator is connected with the working medium side entrance of condenser, and the working medium side of condenser goes out Mouth is connected with the heat absorbing side entrance of organic working medium regenerator, and the heat absorbing side of organic working medium regenerator goes out Mouth is connected with the working medium side entrance of heater;
The conduction oil outlet of the conduction oil side entrance of heater and carbon dioxide Brayton Cycle system and The temperature end of middle low-temperature heat accumulating system is connected, the conduction oil side outlet of heater and titanium dioxide carbon cloth Thunder pauses the conduction oil entrance of blood circulation and the low-temperature end of middle low-temperature heat accumulating system is connected.
The working medium side outlet of condenser passes through organic working medium with the heat absorbing side entrance of organic working medium regenerator Pump is connected.
The low-temperature end of middle low-temperature heat accumulating system and the conduction oil outlet of middle low temperature organic rankine cycle system By passing through the conduction oil entrance of Heat-transfer Oil Pump and carbon dioxide Brayton Cycle system after pipeline pipe It is connected.
The supercritical carbon dioxide of complementary type of the present invention and organic Rankine cogeneration method bag Include following steps:
The heat collected when solar thermal collector disclosure satisfy that middle low temperature organic rankine cycle system is During underrun, then close boiler, the entrance of Guan Bi boiler and outlet, simultaneously switch off middle low temperature Contacting between hold over system and middle low temperature organic rankine cycle system, solar thermal collector output High-temperature supercritical carbon dioxide working medium enters in supercritical carbon dioxide Brayton Cycle system, and In supercritical carbon dioxide Brayton Cycle system, acting generating heat release forms supercritical carbon dioxide Working medium, is heated conduction oil by heat exchange simultaneously, and supercritical carbon dioxide working medium enters into In solar thermal collector, heat absorption forms high-temperature supercritical carbon dioxide working medium;Conduction oil after heating divides Do not enter in middle low-temperature heat accumulating system and in middle low temperature organic rankine cycle system, conduction oil in Low-temperature heat accumulating system enters back into after heat release heat exchange in supercritical carbon dioxide Brayton Cycle system, Conduction oil enters back into supercritical carbon dioxide mine-laying after middle low temperature organic rankine cycle system heat release Heat exchange in blood circulation of pausing;
When night, solar thermal collector did not collected heat, and storage in middle low-temperature heat accumulating system (7) When having the heat of accumulation, then disconnecting solar thermal collector, in disconnection, low-temperature heat accumulating system is faced with super Contact between boundary's carbon dioxide Brayton Cycle system, opens boiler, and boiler is according to supercritical two The minimum load operation of carbonoxide Brayton Cycle system requires the combusts fossil energy, boiler output High-temperature supercritical carbon dioxide working medium enters in supercritical carbon dioxide Brayton Cycle system, and Supercritical carbon dioxide Brayton Cycle system does work and generates electricity heat release and conduction oil is carried out heat exchange Forming supercritical carbon dioxide working medium, supercritical carbon dioxide working medium enters into heat absorption in boiler and is formed High-temperature supercritical carbon dioxide working medium;In Tong Shi low-temperature heat accumulating system output conduction oil and supercritical The conduction oil of carbon dioxide Brayton Cycle system output enters into middle low temperature organic Rankine after confluxing and follows Heat release in loop systems, then enters back into middle low-temperature heat accumulating system and supercritical carbon dioxide Bretton Blood circulation is absorbed heat.
When solar thermal collector can collect heat, but the heat collected can not to meet middle low temperature organic When the minimum load operation of Rankine cycle system and accumulation of heat heat, then make normal operation of boiler, simultaneously Contacting between low-temperature heat accumulating system and middle low temperature organic rankine cycle system, solar energy collection in disconnection The high-temperature supercritical carbon dioxide working medium of hot device output and the high-temperature supercritical carbon dioxide of boiler output Working medium enters in supercritical carbon dioxide Brayton Cycle system after confluxing, and at supercritical dioxy Change acting generating heat release in carbon Brayton Cycle system and form supercritical carbon dioxide working medium, lead to simultaneously Crossing heat exchange to heat conduction oil, supercritical carbon dioxide working medium enters into solar thermal collector And heat absorption forms high-temperature supercritical carbon dioxide working medium in boiler;Conduction oil after heating respectively enters In middle low-temperature heat accumulating system and in middle low temperature organic rankine cycle system, conduction oil is at middle Low Temperature Storage Hot systems enters back into after heat release heat exchange in supercritical carbon dioxide Brayton Cycle system, heat conduction Oil enters back into supercritical carbon dioxide Bretton after middle low temperature organic rankine cycle system heat release and follows Heat exchange in loop systems.
When solar thermal collector does not collects heat by day, then disconnect solar thermal collector and in low Intermediate temperature regenerator system, then day and night is switched on boiler, the high-temperature supercritical titanium dioxide of boiler output Carbon working medium enters in supercritical carbon dioxide Brayton Cycle system, and at supercritical carbon dioxide Doing work in Brayton Cycle system generates electricity heat release and conduction oil carries out heat exchange forms supercritical titanium dioxide Carbon working medium, supercritical carbon dioxide working medium enters into heat absorption in boiler and forms high-temperature supercritical titanium dioxide Carbon working medium;The conduction oil of supercritical carbon dioxide Brayton Cycle system output simultaneously is low in entering into Heat release in temperature organic rankine cycle system, then enters back into supercritical carbon dioxide Brayton cycle System is absorbed heat.
The method have the advantages that
The supercritical carbon dioxide of complementary type of the present invention and organic Rankine combined generating system and Method is operationally, it is possible to by solar thermal collector, unified boiler or be individually for titanium dioxide carbon cloth Thunder pause blood circulation provide high-temperature supercritical carbon dioxide working medium, during solar radiation abundance, i.e. the sun The heat that energy heat collector is collected disclosure satisfy that the minimum load operation of middle low temperature organic rankine cycle system And during accumulation of heat heat, then close boiler, only provide heat by solar thermal collector, will be many simultaneously Remaining heat stores in middle low-temperature heat accumulating system;At night, solar thermal collector does not collect heat Time, and when middle low-temperature heat accumulating system stores the heat of accumulation, then by boiler and middle low temperature Hold over system provides heat jointly, and by day, the heat collected when solar thermal collector can not meet When the normal work of middle low temperature organic rankine cycle system and accumulation of heat heat, then by boiler and the sun Heat be can jointly provide by heat collector, thus seasonality and the regulation of cloudy weather for several days running sky Large Copacity heat energy realized, Reliability is higher, effectively reduces this consumption ratio of fossil energy simultaneously, it is provided that the utilization of solar energy Efficiency.It addition, compared with light water steam heating power circulation electric generating apparatus, the present invention uses supercritical Carbon dioxide is working medium, so that the volume of system is less, more compact, the thermal efficiency is higher, theoretical On water vapour thermodynamic cycle when can reach 700 DEG C of supercritical carbon dioxide working medium when 600 DEG C Efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Wherein, 1 be solar thermal collector, 2 be boiler, 3 be carbon dioxide turbine, 4 for dioxy Change carbon regenerator, 5 for precooler, 6 be compressor, 7 for middle low-temperature heat accumulating system, 8 be heat conduction Oil pump, 9 be heater, 10 be organic working medium turbine, 11 be organic working medium regenerator, 12 for cold Condenser, 13 it is organic working medium pump.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in further detail:
With reference to Fig. 1, the supercritical carbon dioxide of complementary type of the present invention and organic Rankine associating Electricity generation system include solar thermal collector 1, boiler 2, carbon dioxide Brayton Cycle system, in low Intermediate temperature regenerator system and middle low temperature organic rankine cycle system;The outlet of solar thermal collector 1 and boiler Outlet all supercritical carbon dioxide working medium with supercritical carbon dioxide Brayton Cycle system of 2 enters Mouth is connected, the supercritical carbon dioxide sender property outlet of supercritical carbon dioxide Brayton Cycle system It is connected with the entrance of solar thermal collector 1 and the entrance of boiler 2, supercritical carbon dioxide mine-laying The conduction oil outlet of blood circulation of pausing is organic bright with the temperature end of middle low-temperature heat accumulating system 7 and middle low temperature The conduction oil entrance agreeing blood circulation is connected, the low-temperature end of middle low-temperature heat accumulating system 7 and middle low temperature The conduction oil outlet of organic rankine cycle system enters with the conduction oil of carbon dioxide Brayton Cycle system Mouth is connected.
Supercritical carbon dioxide Brayton Cycle system includes that carbon dioxide turbine 3, carbon dioxide return Hot device 4, precooler 5 and compressor 6, the outlet of solar thermal collector 1 and the outlet of boiler 2 with The entrance of carbon dioxide turbine 3 is connected, the outlet of carbon dioxide turbine 3 and carbon dioxide backheat The cold side entrance of device 4 is connected, cold side outlet and the precooler 5 of carbon dioxide regenerator 4 Cold side entrance be connected, the outlet of the cold side of precooler 5 is connected with the entrance of compressor 6, The outlet of compressor 6 is connected with the heat absorbing side entrance of carbon dioxide regenerator 4, and carbon dioxide returns The heat absorbing side outlet of hot device 4 is connected with the entrance of solar thermal collector 1 and the entrance of boiler 2; The heat absorbing side outlet of precooler 5 and the temperature end of middle low-temperature heat accumulating system 7 and middle low temperature organic Rankine The conduction oil entrance of blood circulation is connected, and low-temperature end and the middle low temperature of middle low-temperature heat accumulating system 7 have The conduction oil outlet of machine Rankine cycle system is connected with the heat absorbing side entrance of precooler 5.
Described middle low temperature organic rankine cycle system includes heater 9, organic working medium turbine 10, has Machine working medium regenerator 11 and condenser 12, working medium side outlet and the organic working medium turbine of heater 9 The entrance of 10 is connected, the outlet of organic working medium turbine 10 and the heat release of organic working medium regenerator 11 Side entrance is connected, the cold side outlet of organic working medium regenerator 11 and the working medium side of condenser 12 Entrance is connected, and the working medium side outlet of condenser 12 enters with the heat absorbing side of organic working medium regenerator 11 Mouth is connected, the heat absorbing side outlet of organic working medium regenerator 11 and the working medium side entrance phase of heater 9 Connection;The conduction oil side entrance of heater 9 and leading of supercritical carbon dioxide Brayton Cycle system The temperature end of hot oil outlet and middle low-temperature heat accumulating system 7 is connected, and the conduction oil side of heater 9 goes out Mouth and the conduction oil entrance of supercritical carbon dioxide Brayton Cycle system and middle low-temperature heat accumulating system 7 Low-temperature end be connected.
It addition, the working medium side outlet of condenser 12 and the heat absorbing side entrance of organic working medium regenerator 11 It is connected by organic working medium pump 13;Low-temperature end and the middle low temperature of middle low-temperature heat accumulating system 7 are organic bright It agree the conduction oil outlet of blood circulation by passing through Heat-transfer Oil Pump 8 and supercritical dioxy after pipeline pipe The conduction oil entrance changing carbon Brayton Cycle system is connected.
The work process of supercritical carbon dioxide Brayton Cycle system is:
High-temperature supercritical carbon dioxide working medium enters carbon dioxide turbine 3 and does work, and converts heat into Being converted to low-pressure supercritical carbon dioxide working medium after electric energy, low-pressure supercritical carbon dioxide working medium enters Heat release after the cold side of carbon dioxide regenerator 4, is cooled then into precooler 5, cold But supercritical carbon dioxide working medium enters supercharging in compressor 6, the supercritical titanium dioxide after supercharging Carbon working medium enters the heat absorbing side heat absorption of carbon dioxide regenerator 4, absorbs the supercritical dioxy after waste heat Change carbon working medium and be again introduced in solar thermal collector 1 and boiler 2 heat absorption formation high-temperature supercritical dioxy Change carbon working medium.
The work process of middle low temperature organic rankine cycle system is:
Conduction oil directly exports after entering into the cold side heat release of heater 9, and organic working medium is in heating The heat absorbing side of device 9 enters into acting heat release in organic working medium turbine 10 after absorbing heat, after heat release The working medium side that organic working medium enters into condenser 12 after the cold side of organic working medium regenerator 11 is cold Coagulating for liquid, the organic working medium of liquid enters into organic working medium backheat after organic working medium pump 13 supercharging The heat absorbing side heat absorption of device 11, the heat absorbing side then entering back into heater 9 absorbs heat, completes to follow Ring process.
The supercritical carbon dioxide of complementary type of the present invention and organic Rankine cogeneration method bag Include following steps:
The heat collected when solar thermal collector 1 disclosure satisfy that middle low temperature organic rankine cycle system When minimum load operation and accumulation of heat heat, then close boiler 2, close entrance and the outlet of boiler 2, Simultaneously switch off contacting, too between low-temperature heat accumulating system 7 and middle low temperature organic rankine cycle system The high-temperature supercritical carbon dioxide working medium of sun energy heat collector 1 output enters into supercritical carbon dioxide cloth Thunder pauses in blood circulation, and acting generating heat release in supercritical carbon dioxide Brayton Cycle system Form supercritical carbon dioxide working medium, by heat exchange, conduction oil is heated, supercritical simultaneously Carbon dioxide working medium enters into heat absorption in solar thermal collector 1 and forms high-temperature supercritical carbon dioxide work Matter;Conduction oil after heating has respectively entered in middle low-temperature heat accumulating system 7 and middle low temperature organic Rankine In blood circulation, conduction oil enters back into supercritical dioxy after heat release in middle low-temperature heat accumulating system 7 Changing heat exchange in carbon Brayton Cycle system, conduction oil is after middle low temperature organic rankine cycle system heat release Enter back into heat exchange in supercritical carbon dioxide Brayton Cycle system;
When night, solar thermal collector 1 did not collected heat, and in middle low-temperature heat accumulating system (7) When storing the heat of accumulation, then disconnect solar thermal collector 1, low-temperature heat accumulating system 7 in disconnection And contacting between supercritical carbon dioxide Brayton Cycle system, opens boiler 2,2, boiler The combusts fossil energy, boiler 2 is required according to the minimum load operation of carbon dioxide Brayton Cycle system The high-temperature supercritical carbon dioxide working medium of output enters into supercritical carbon dioxide Brayton Cycle system In, and acting generating heat release conduction oil is entered in supercritical carbon dioxide Brayton Cycle system Row heat exchange forms supercritical carbon dioxide working medium, and supercritical carbon dioxide working medium enters in boiler 2 Heat absorption forms high-temperature supercritical carbon dioxide working medium;The heat conduction of low-temperature heat accumulating system 7 output in Tong Shi The conduction oil that oil and supercritical carbon dioxide Brayton Cycle system export enters into middle low temperature after confluxing Heat release in organic rankine cycle system, then enters back into middle low-temperature heat accumulating system 7 and supercritical two Carbonoxide Brayton Cycle system absorbs heat;
When solar thermal collector 1 can collect heat, but the heat collected can not meet middle low temperature and have When the minimum load operation of machine Rankine cycle system and accumulation of heat heat, then boiler 2 is made normally to work, Simultaneously switch off contacting, too between low-temperature heat accumulating system 7 and middle low temperature organic rankine cycle system The high-temperature supercritical carbon dioxide working medium of sun energy heat collector 1 output is super with the high temperature that boiler 2 exports faces Boundary's carbon dioxide working medium enters in supercritical carbon dioxide Brayton Cycle system after confluxing, and In supercritical carbon dioxide Brayton Cycle system, acting generating heat release forms supercritical carbon dioxide work Matter, is heated conduction oil by heat exchange simultaneously, and supercritical carbon dioxide working medium enters into too In sun energy heat collector 1 and boiler 2, heat absorption forms high-temperature supercritical carbon dioxide working medium;After heating Conduction oil has respectively entered in middle low-temperature heat accumulating system 7 and in middle low temperature organic rankine cycle system, Conduction oil enters back into supercritical carbon dioxide Bretton after heat release in middle low-temperature heat accumulating system 7 and follows Heat exchange in loop systems, conduction oil enters back into super facing after middle low temperature organic rankine cycle system heat release Heat exchange in boundary's carbon dioxide Brayton Cycle system.
When solar thermal collector 1 does not collects heat by day, then disconnect solar thermal collector 1 And middle low-temperature heat accumulating system 7, then day and night is switched on boiler 2, and the high temperature of boiler 2 output surpasses Critical carbon dioxide working medium enters in supercritical carbon dioxide Brayton Cycle system, and faces super Doing work in boundary's carbon dioxide Brayton Cycle system generates electricity heat release and conduction oil is carried out heat exchange is formed super Critical carbon dioxide working medium, supercritical carbon dioxide working medium enters into heat absorption in boiler 2 and forms high temperature Supercritical carbon dioxide working medium;The heat conduction of supercritical carbon dioxide Brayton Cycle system output simultaneously Oil enters into heat release in middle low temperature organic rankine cycle system, then enters back into supercritical titanium dioxide Carbon Brayton Cycle system absorbs heat.
Above-described detailed description of the invention, to the purpose of the present invention, technical scheme and beneficial effect Further described, be it should be understood that and the foregoing is only the concrete real of the present invention Execute mode, be not limited to the present invention, all within the spirit and principles in the present invention, institute Any modification, equivalent substitution and improvement etc. done, should be included within the scope of the present invention.

Claims (6)

1. the supercritical carbon dioxide of complementary type and an organic Rankine combined generating system, its feature It is, including solar thermal collector (1), boiler (2), supercritical carbon dioxide Brayton cycle system System, middle low-temperature heat accumulating system and middle low temperature organic rankine cycle system;
The outlet of solar thermal collector (1) and the outlet of boiler (2) all with supercritical carbon dioxide cloth The pause supercritical carbon dioxide working medium entrance of blood circulation of thunder is connected, supercritical carbon dioxide Bretton The entrance of the supercritical carbon dioxide sender property outlet of blood circulation and solar thermal collector (1) and boiler (2) entrance is connected, the outlet of the conduction oil of supercritical carbon dioxide Brayton Cycle system with in The temperature end of low-temperature heat accumulating system (7) and the conduction oil entrance phase of middle low temperature organic rankine cycle system Connection, the low-temperature end of middle low-temperature heat accumulating system (7) and the heat conduction of middle low temperature organic rankine cycle system Oil export is connected with the conduction oil entrance of supercritical carbon dioxide Brayton Cycle system;
The temperature end of middle low-temperature heat accumulating system (7) and the conduction oil of middle low temperature organic rankine cycle system Entrance is connected, the low-temperature end of middle low-temperature heat accumulating system (7) and middle low temperature organic rankine cycle system Conduction oil outlet be connected.
The supercritical carbon dioxide of complementary type the most according to claim 1 and organic Rankine associating Electricity generation system, it is characterised in that supercritical carbon dioxide Brayton Cycle system includes that carbon dioxide is saturating Flat (3), carbon dioxide regenerator (4), precooler (5) and compressor (6), solar energy heating The outlet of device (1) and the outlet of boiler (2) are connected with the entrance of carbon dioxide turbine (3), The outlet of carbon dioxide turbine (3) is connected with the cold side entrance of carbon dioxide regenerator (4), The cold side outlet of carbon dioxide regenerator (4) is connected with the cold side entrance of precooler (5), The cold side outlet of precooler (5) is connected with the entrance of compressor (6), compressor (6) Outlet is connected with the heat absorbing side entrance of carbon dioxide regenerator (4), carbon dioxide regenerator (4) Heat absorbing side outlet be connected with the entrance of solar thermal collector (1) and the entrance of boiler (2);
The heat absorbing side outlet of precooler (5) and the temperature end of middle low-temperature heat accumulating system (7) and middle low temperature The conduction oil entrance of organic rankine cycle system is connected, the low-temperature end of middle low-temperature heat accumulating system (7) And the heat absorbing side entrance phase of the conduction oil outlet of middle low temperature organic rankine cycle system and precooler (5) Connection.
The supercritical carbon dioxide of complementary type the most according to claim 1 and organic Rankine associating Electricity generation system, it is characterised in that described middle low temperature organic rankine cycle system include heater (9), Organic working medium turbine (10), organic working medium regenerator (11) and condenser (12), heater (9) Working medium side outlet be connected with the entrance of organic working medium turbine (10), organic working medium turbine (10) Outlet be connected with the cold side entrance of organic working medium regenerator (11), organic working medium regenerator (11) Cold side outlet be connected with the working medium side entrance of condenser (12), the working medium of condenser (12) Side outlet is connected with the heat absorbing side entrance of organic working medium regenerator (11), organic working medium regenerator (11) Heat absorbing side outlet be connected with the working medium side entrance of heater (9);
The conduction oil side entrance of heater (9) is led with supercritical carbon dioxide Brayton Cycle system The temperature end of hot oil outlet and middle low-temperature heat accumulating system (7) is connected, the conduction oil of heater (9) The conduction oil entrance of side outlet and supercritical carbon dioxide Brayton Cycle system and middle low-temperature heat accumulating system The low-temperature end of system (7) is connected.
The supercritical carbon dioxide of complementary type the most according to claim 1 and organic Rankine associating Electricity generation system, it is characterised in that working medium side outlet and the organic working medium regenerator (11) of condenser (12) Heat absorbing side entrance be connected by organic working medium pump (13).
The supercritical carbon dioxide of complementary type the most according to claim 1 and organic Rankine associating Electricity generation system, it is characterised in that low-temperature end and the middle low temperature of middle low-temperature heat accumulating system (7) are organic bright It agree the conduction oil outlet of blood circulation by passing through Heat-transfer Oil Pump (8) and supercritical two after pipeline pipe The conduction oil entrance of carbonoxide Brayton Cycle system is connected.
6. the supercritical carbon dioxide of complementary type and an organic Rankine cogeneration method, its feature Be, supercritical carbon dioxide based on the complementary type described in claim 1 and organic Rankine combine send out Electricity system, comprises the following steps:
The heat collected when solar thermal collector (1) disclosure satisfy that middle low temperature organic rankine cycle system Minimum load operation and during accumulation of heat heat, then close boiler (2), the entrance of Guan Bi boiler (2) And outlet, simultaneously switch off between middle low-temperature heat accumulating system (7) and middle low temperature organic rankine cycle system Contact, the high-temperature supercritical carbon dioxide working medium that solar thermal collector (1) exports enters into super facing In boundary's carbon dioxide Brayton Cycle system, and do in supercritical carbon dioxide Brayton Cycle system Merit generating heat release forms supercritical carbon dioxide working medium, is heated conduction oil by heat exchange simultaneously, Supercritical carbon dioxide working medium enters into heat absorption in solar thermal collector (1) and forms high-temperature supercritical two Carbonoxide working medium;Conduction oil after heating have respectively entered in middle low-temperature heat accumulating system (7) and in low In temperature organic rankine cycle system, conduction oil enters back into after heat release in middle low-temperature heat accumulating system (7) Heat exchange in supercritical carbon dioxide Brayton Cycle system, conduction oil is at middle low temperature organic Rankine bottoming cycle Heat exchange in supercritical carbon dioxide Brayton Cycle system is entered back into after system heat release;
When not collecting heat solar thermal collector at night (1), and middle low-temperature heat accumulating system (7) In when storing the heat of accumulation, then disconnect solar thermal collector (1), low-temperature heat accumulating system in disconnection (7) contacting and between carbon dioxide Brayton Cycle system, opens boiler (2), boiler (2) Minimum load operation according to carbon dioxide Brayton Cycle system requires the combusts fossil energy, boiler (2) The high-temperature supercritical carbon dioxide working medium of output enters into supercritical carbon dioxide Brayton Cycle system In, and acting generating heat release conduction oil is carried out in supercritical carbon dioxide Brayton Cycle system Heat exchange forms supercritical carbon dioxide working medium, and supercritical carbon dioxide working medium enters in boiler (2) Heat absorption forms high-temperature supercritical carbon dioxide working medium;What in Tong Shi, low-temperature heat accumulating system (7) exported leads The conduction oil that deep fat and supercritical carbon dioxide Brayton Cycle system export is low in entering into after confluxing Heat release in temperature organic rankine cycle system, then enters back into middle low-temperature heat accumulating system (7) and super faces Boundary's carbon dioxide Brayton Cycle system absorbs heat;
When solar thermal collector (1) can collect heat, but the heat collected can not meet middle low temperature When the minimum load operation of organic rankine cycle system and accumulation of heat heat, then make the normal work of boiler (2) Make, simultaneously switch off the connection between middle low-temperature heat accumulating system (7) and middle low temperature organic rankine cycle system System, the high-temperature supercritical carbon dioxide working medium that solar thermal collector (1) exports exports with boiler (2) High-temperature supercritical carbon dioxide working medium conflux after enter into supercritical carbon dioxide Brayton cycle system In system, and acting generating heat release forms supercritical two in supercritical carbon dioxide Brayton Cycle system Carbonoxide working medium, is heated conduction oil by heat exchange simultaneously, and supercritical carbon dioxide working medium is entered Enter in solar thermal collector (1) and boiler (2) heat absorption and form high-temperature supercritical carbon dioxide working medium; Conduction oil after heating has respectively entered in middle low-temperature heat accumulating system (7) and middle low temperature organic Rankine follows In loop systems, conduction oil enters back into supercritical dioxy after heat release in middle low-temperature heat accumulating system (7) Change heat exchange in carbon Brayton Cycle system, conduction oil after middle low temperature organic rankine cycle system heat release again Enter into heat exchange in supercritical carbon dioxide Brayton Cycle system;
When solar thermal collector (1) does not collects heat by day, then disconnect solar thermal collector (1) And middle low-temperature heat accumulating system (7), then day and night is switched on boiler (2), and boiler (2) exports High-temperature supercritical carbon dioxide working medium enter in supercritical carbon dioxide Brayton Cycle system, and Supercritical carbon dioxide Brayton Cycle system does work and generates electricity heat release and conduction oil is carried out heat exchange Forming supercritical carbon dioxide working medium, supercritical carbon dioxide working medium enters into heat absorption in boiler (2) Form high-temperature supercritical carbon dioxide working medium;Supercritical carbon dioxide Brayton Cycle system output simultaneously Conduction oil enter into heat release in middle low temperature organic rankine cycle system, then enter back into supercritical two Carbonoxide Brayton Cycle system absorbs heat.
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CN106352317A (en) * 2016-09-14 2017-01-25 西安热工研究院有限公司 Thermal power generation system adopting supercritical carbon dioxide Bretton and steam Rankine combined cycle
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CN106352317A (en) * 2016-09-14 2017-01-25 西安热工研究院有限公司 Thermal power generation system adopting supercritical carbon dioxide Bretton and steam Rankine combined cycle
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CN110863961A (en) * 2019-11-28 2020-03-06 西安石油大学 Supercritical CO2Recompression brayton and LNG combined cycle power generation system

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