CN105840442B - The supercritical carbon dioxide and organic Rankine combined generating system and method for complementary type - Google Patents
The supercritical carbon dioxide and organic Rankine combined generating system and method for complementary type Download PDFInfo
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- CN105840442B CN105840442B CN201610316968.4A CN201610316968A CN105840442B CN 105840442 B CN105840442 B CN 105840442B CN 201610316968 A CN201610316968 A CN 201610316968A CN 105840442 B CN105840442 B CN 105840442B
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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 kind of supercritical carbon dioxide of complementary type and organic Rankine combined generating system and methods, the outlet of solar thermal collector and the outlet of boiler are connected with the supercritical carbon dioxide working medium entrances of supercritical carbon dioxide Brayton Cycle system, the supercritical carbon dioxide sender property outlet of supercritical carbon dioxide Brayton Cycle system is connected with the entrance of the entrance of solar thermal collector and boiler, the conduction oil outlet of supercritical carbon dioxide Brayton Cycle system is connected with the heat conducting oil inlet of the temperature end of middle low-temperature heat accumulating system and middle low temperature organic rankine cycle system, the low-temperature end of middle low-temperature heat accumulating system and the conduction oil outlet of middle low temperature organic rankine cycle system are connected with the heat conducting oil inlet of supercritical carbon dioxide Brayton Cycle system.The large capacity Thermoregulation of the present invention that can realize seasonal and continuous rainy days.
Description
Technical field
The present invention relates to a kind of combined generating system and methods, and in particular to a kind of supercritical carbon dioxide of complementary type and
Organic Rankine combined generating system and method.
Background technology
Solar energy is a kind of inexhaustible clean energy resource, but not only there is amount of radiation periods day for solar energy
Property variation, there is also amount of radiation seasonal varieties, while can be influenced at any time by weather conditions such as wet weather.Theoretically may be used at present
To solve the problems, such as that solar energy the diurnal distribution is uneven using relatively inexpensive thermal storage and energy accumulation, this is also solar light-heat power-generation
One of considerable advantage, but thermodynamic cycle is wished to improve the thermal efficiency by improving maximum cycle temperature, and with maximum temperature
It improves regenerator temperature to be also continuously improved, this all brings the tired of bigger to heat-storing material, hold over system container, Insulation etc.
It is difficult.If can be while keeping thermodynamic cycle higher temperature, reducing regenerator temperature can reduce what system was designed and run
Difficulty.
When in addition facing continuous rainy weather and solar radiation seasonal variety, the regulating power of hold over system is limited,
It will be difficult to meet heating demand.And heat blank of fossil energy when can supplement continuous without sunlight completely, it can also supplement by season
Solar radiation is insufficient for a long time caused by section variation, while the heat that fossil energy provides is easy to control, when solar radiation heat
When unstable fluctuation occurs, the heat that fossil energy provides can be used as effective heat control measures, make electricity generation system can
Really to realize operating steady in a long-term.
It can be used as supplement solar irradiation deficiency or continuously the fossil energy without solar irradiation include that coal, natural gas, oil etc. are more
Kind fossil energy.It is highly developed as the boiler of fuel and electricity generation system using this kind of fossil energy, such as fire common at present
Station boiler etc., this kind of system can reach flexible modulation and smooth long term running, while the adjusting of additional heat easy to implement,
The unstable defect of solar radiation heat can just be made up.
Photo-thermal power generation needs to realize heat to electricity conversion, at present in numerous thermodynamic cycles, overcritical cloth by thermodynamic cycle
Thunder cycle is a kind of most advantageous circulation form.The overcritical working medium of novel carbon dioxide has energy density big, heat transfer effect
Rate is high, the innate advantages such as simple system, can greatly improve heat to power output efficiency, reduces equipment volume, has very high economy
Property, it is the trend for substituting the optimal selection of existing vapor circulation system, and the following heat and power system develops.
However the system for realizing energy adjustment only with the energy storage mode such as accumulation of heat cannot achieve seasonal and continuous wet weather
The adjusting of the large capacities thermal energy such as it, and the adjusting of energy round the clock can only be realized in a small range, it is only pre- using solar energy as low temperature
The electricity generation system of hot part auxiliary thermal source does not realize the value of solar energy high-grade energy, and the fossil energy ratio consumed fully
Example is larger, not using accumulation of heat only with the solar power system of fossil energy supplement, equally exists fossil energy consumption
The excessive disadvantage of ratio.
Invention content
It is an object of the invention to overcome the above-mentioned prior art, a kind of overcritical titanium dioxide of complementary type is provided
Carbon and organic Rankine combined generating system and method, the system and method can realize the large capacity of seasonal and continuous rainy days
Thermoregulation, and fossil energy consumption ratio is smaller.
In order to achieve the above objectives, the supercritical carbon dioxide of complementary type of the present invention and organic Rankine cogeneration system
System includes solar thermal collector, boiler, carbon dioxide Brayton Cycle system, middle low-temperature heat accumulating system and middle low temperature organic Rankine
The circulatory system；
The outlet of solar thermal collector and the outlet of boiler are faced with the super of supercritical carbon dioxide Brayton Cycle system
Boundary's carbon dioxide working medium entrances are connected, the supercritical carbon dioxide sender property outlet of supercritical carbon dioxide Brayton Cycle system
It is connected with the entrance of the entrance of solar thermal collector and boiler, the conduction oil of supercritical carbon dioxide Brayton Cycle system goes out
Mouth is connected with the heat conducting oil inlet of the temperature end of middle low-temperature heat accumulating system and middle low temperature organic rankine cycle system, middle Low Temperature Storage
The low-temperature end of hot systems and the conduction oil outlet of middle low temperature organic rankine cycle system and supercritical carbon dioxide Brayton cycle
The heat conducting oil inlet of system is connected；
The temperature end of middle low-temperature heat accumulating system is connected with the heat conducting oil inlet of middle low temperature organic rankine cycle system, in it is low
The low-temperature end of intermediate temperature regenerator system is connected with the conduction oil outlet of middle low temperature organic rankine cycle system.
Supercritical carbon dioxide Brayton Cycle system include carbon dioxide turbine, carbon dioxide regenerator, forecooler and
Compressor, the outlet of solar thermal collector and the outlet of boiler are connected with the entrance of carbon dioxide turbine, carbon dioxide turbine
Outlet be connected with the heat release side entrance of carbon dioxide regenerator, the heat release side outlet of carbon dioxide regenerator and forecooler
Heat release side entrance is connected, and the heat release side outlet of forecooler is connected with the entrance of compressor, the outlet of compressor and titanium dioxide
The heat absorption side entrance of carbon regenerator is connected, the entrance and pot of the heat absorption side outlet and solar thermal collector of carbon dioxide regenerator
The entrance of stove is connected；
The temperature end of heat absorption side outlet and the middle low-temperature heat accumulating system of forecooler and middle low temperature organic rankine cycle system
Heat conducting oil inlet is connected, the conduction oil outlet of the low-temperature end of middle low-temperature heat accumulating system and middle low temperature organic rankine cycle system with
The heat absorption side entrance of forecooler is connected.
The middle low temperature organic rankine cycle system includes heater, organic working medium turbine, organic working medium regenerator and cold
The working medium side outlet of condenser, heater is connected with the entrance of organic working medium turbine, the outlet of organic working medium turbine and organic work
The heat release side entrance of matter regenerator is connected, and the heat release side outlet of organic working medium regenerator is connected with the working medium side entrance of condenser
Logical, the working medium side outlet of condenser is connected with the heat absorption side entrance of organic working medium regenerator, the heat absorption of organic working medium regenerator
Side outlet is connected with the working medium side entrance of heater；
The conduction oil side entrance of heater and the conduction oil outlet of carbon dioxide Brayton Cycle system and middle low-temperature heat accumulating
The temperature end of system is connected, the conduction oil side outlet of heater and the heat conducting oil inlet of carbon dioxide Brayton Cycle system and
The low-temperature end of middle low-temperature heat accumulating system is connected.
The working medium side outlet of condenser is connected with the heat absorption side entrance of organic working medium regenerator by organic working medium pump.
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 pipeline simultaneously
It is connected with the heat conducting oil inlet of carbon dioxide Brayton Cycle system by Heat-transfer Oil Pump after pipe.
The supercritical carbon dioxide and organic Rankine cogeneration method of complementary type of the present invention include the following steps：
When the heat that solar thermal collector is collected disclosure satisfy that the minimum load operation of middle low temperature organic rankine cycle system
When, then boiler is closed, entrance and the outlet of boiler are closed, simultaneously switches off middle low-temperature heat accumulating system and middle low temperature Organic Rankine Cycle
The high-temperature supercritical carbon dioxide working medium of contact between system, solar thermal collector output enters supercritical carbon dioxide cloth
In the thunder circulatory system, and acting power generation heat release forms overcritical titanium dioxide in supercritical carbon dioxide Brayton Cycle system
Carbon working medium, while conduction oil is heated by heat exchange, supercritical carbon dioxide working medium enters in solar thermal collector
Heat absorption forms high-temperature supercritical carbon dioxide working medium；Conduction oil after heating have respectively entered in middle low-temperature heat accumulating system and in it is low
In warm organic rankine cycle system, conduction oil enters back into supercritical carbon dioxide mine-laying in middle low-temperature heat accumulating system after heat release
It exchanges heat in the circulatory system of pausing, conduction oil enters back into supercritical carbon dioxide cloth after middle low temperature organic rankine cycle system heat release
It exchanges heat in the thunder circulatory system；
The heat of accumulation is stored when night, solar thermal collector did not collected heat, and in middle low-temperature heat accumulating system (7)
When amount, then solar thermal collector is disconnected, in disconnection between low-temperature heat accumulating system and supercritical carbon dioxide Brayton Cycle system
Contact, open boiler, boiler according to the minimum load operation of supercritical carbon dioxide Brayton Cycle system require burningization
The high-temperature supercritical carbon dioxide working medium of the stone energy, boiler output enters in supercritical carbon dioxide Brayton Cycle system,
And it does work to generate electricity heat release and carry out heat exchange to conduction oil in supercritical carbon dioxide Brayton Cycle system and forms overcritical two
Carbonoxide working medium, supercritical carbon dioxide working medium enter heat absorption in boiler and form high-temperature supercritical carbon dioxide working medium；Simultaneously
The conduction oil of middle low-temperature heat accumulating system output and the conduction oil confluence that supercritical carbon dioxide Brayton Cycle system exports are laggard
Enter the heat release into middle low temperature organic rankine cycle system, then enters back into middle low-temperature heat accumulating system and supercritical carbon dioxide cloth
It absorbs heat in the thunder circulatory system.
When solar thermal collector can collect heat, but the heat collected cannot meet in low temperature organic rankine cycle system
Minimum load operation and when accumulation of heat heat, then make normal operation of boiler, simultaneously switching off middle low-temperature heat accumulating system and middle low temperature has
Contact between machine Rankine cycle system, high-temperature supercritical carbon dioxide working medium and the boiler output of solar thermal collector output
It is entered in supercritical carbon dioxide Brayton Cycle system after high-temperature supercritical carbon dioxide working medium confluence, and overcritical two
Acting power generation heat release forms supercritical carbon dioxide working medium in carbonoxide Brayton Cycle system, while by heat exchange to heat conduction
Oil is heated, and supercritical carbon dioxide working medium enters heat absorption in solar thermal collector and boiler and forms high-temperature supercritical dioxy
Change carbon working medium；Conduction oil after heating has respectively entered in middle low-temperature heat accumulating system and in middle low temperature organic rankine cycle system,
Conduction oil is entered back into supercritical carbon dioxide Brayton Cycle system after heat release in middle low-temperature heat accumulating system and is exchanged heat, heat conduction
Oil is entered back into supercritical carbon dioxide Brayton Cycle system after middle low temperature organic rankine cycle system heat release and is exchanged heat.
When solar thermal collector does not collect heat on daytime, then solar thermal collector and middle low-temperature heat accumulating system are disconnected,
Then day and night is switched on boiler, and the high-temperature supercritical carbon dioxide working medium of boiler output enters supercritical carbon dioxide cloth
In the thunder circulatory system, and acting power generation heat release and conduction oil is changed in supercritical carbon dioxide Brayton Cycle system
Thermosetting supercritical carbon dioxide working medium, supercritical carbon dioxide working medium enter heat absorption in boiler and form high-temperature supercritical dioxy
Change carbon working medium；The conduction oil of supercritical carbon dioxide Brayton Cycle system output simultaneously enters middle low temperature Organic Rankine Cycle
Then heat release in system is entered back into supercritical carbon dioxide Brayton Cycle system and is absorbed heat.
The invention has the advantages that：
The supercritical carbon dioxide and organic Rankine combined generating system and method for complementary type of the present invention are working
When, by solar thermal collector, unified boiler or carbon dioxide Brayton Cycle system offer high-temperature supercritical can be individually for
Carbon dioxide working medium, when solar radiation abundance, i.e., the heat that solar thermal collector is collected disclosure satisfy that middle low temperature organic Rankine follows
When the minimum load operation of loop system and accumulation of heat heat, then boiler is closed, only provide heat by solar thermal collector, simultaneously will
In extra heat storage to middle low-temperature heat accumulating system；At night, when solar thermal collector does not collect heat, and middle Low Temperature Storage
When storing the heat of accumulation in hot systems, then heat is provided jointly by boiler and middle low-temperature heat accumulating system, on daytime, when too
During the heat that positive energy heat collector is collected cannot meet when the normal work and accumulation of heat heat of low temperature organic rankine cycle system, then lead to
It crosses boiler and solar thermal collector provides heat jointly, it, can to realize the adjusting of seasonal and cloudy weather for several days running day large capacity thermal energy
It is higher by property, while this consumption ratio of fossil energy is effectively reduced, the utilization ratio of solar energy is provided.In addition, and light water
Steam heating power circulation electric generating apparatus is compared, and the present invention uses supercritical carbon dioxide for working medium, to make system volume smaller,
More compact, thermal efficiency higher, water vapour heat when theoretically the supercritical carbon dioxide working medium at 600 DEG C can reach 700 DEG C
The efficiency of power cycle.
Description of the drawings
Fig. 1 is the structural diagram of the present invention.
Wherein, 1 it is solar thermal collector, 2 be boiler, 3 be carbon dioxide turbine, 4 be carbon dioxide regenerator, 5 is pre-
Cooler, 6 be compressor, 7 be middle low-temperature heat accumulating system, 8 be Heat-transfer Oil Pump, 9 be heater, 10 be organic working medium turbine, 11 be
Organic working medium regenerator, 12 be condenser, 13 be organic working medium pump.
Specific implementation mode
The present invention is described in further detail below in conjunction with the accompanying drawings：
With reference to figure 1, the supercritical carbon dioxide and organic Rankine combined generating system of complementary type of the present invention include
Solar thermal collector 1, boiler 2, 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 1 and the outlet of boiler 2 are overcritical with supercritical carbon dioxide Brayton Cycle system
Carbon dioxide working medium entrances are connected, the supercritical carbon dioxide sender property outlet of supercritical carbon dioxide Brayton Cycle system with
The entrance of solar thermal collector 1 and the entrance of boiler 2 are connected, and the conduction oil of supercritical carbon dioxide Brayton Cycle system goes out
Mouth is connected with the heat conducting oil inlet of the temperature end of middle low-temperature heat accumulating system 7 and middle low temperature organic rankine cycle system, middle low temperature
The low-temperature end of hold over system 7 and the conduction oil outlet of middle low temperature organic rankine cycle system and carbon dioxide Brayton Cycle system
Heat conducting oil inlet be connected.
Supercritical carbon dioxide Brayton Cycle system includes carbon dioxide turbine 3, carbon dioxide regenerator 4, forecooler 5
And compressor 6, the outlet of solar thermal collector 1 and the outlet of boiler 2 are connected with the entrance of carbon dioxide turbine 3, titanium dioxide
The outlet of carbon turbine 3 is connected with the heat release side entrance of carbon dioxide regenerator 4, the heat release side outlet of carbon dioxide regenerator 4
It is connected with the heat release side entrance of forecooler 5, the heat release side outlet of forecooler 5 is connected with the entrance of compressor 6, compressor 6
Outlet be connected with the heat absorption side entrance of carbon dioxide regenerator 4, the heat absorption side outlet and solar energy of carbon dioxide regenerator 4
The entrance of heat collector 1 is connected with the entrance of boiler 2；The temperature end of the heat absorption side outlet and middle low-temperature heat accumulating system 7 of forecooler 5
And the heat conducting oil inlet of middle low temperature organic rankine cycle system is connected, the low-temperature end of middle low-temperature heat accumulating system 7 and middle low temperature have
The conduction oil outlet of machine Rankine cycle system is connected with the heat absorption side entrance of forecooler 5.
The middle low temperature organic rankine cycle system includes heater 9, organic working medium turbine 10, organic working medium regenerator 11
And condenser 12, the working medium side outlet of heater 9 are connected with the entrance of organic working medium turbine 10, organic working medium turbine 10 goes out
Mouth is connected with the heat release side entrance of organic working medium regenerator 11, heat release side outlet and the condenser 12 of organic working medium regenerator 11
Working medium side entrance be connected, the working medium side outlet of condenser 12 is connected with the heat absorption side entrance of organic working medium regenerator 11,
The heat absorption side outlet of organic working medium regenerator 11 is connected with the working medium side entrance of heater 9；The conduction oil side entrance of heater 9
It is connected with the temperature end of the conduction oil outlet of supercritical carbon dioxide Brayton Cycle system and middle low-temperature heat accumulating system 7, adds
The conduction oil side outlet of hot device 9 and the heat conducting oil inlet of supercritical carbon dioxide Brayton Cycle system and middle low-temperature heat accumulating system
7 low-temperature end is connected.
In addition, the working medium side outlet of condenser 12 and the heat absorption side entrance of organic working medium regenerator 11 are pumped by organic working medium
13 are connected；The low-temperature end of middle low-temperature heat accumulating system 7 and the conduction oil outlet of middle low temperature organic rankine cycle system pass through pipeline
And it is connected with the heat conducting oil inlet of supercritical carbon dioxide Brayton Cycle system by Heat-transfer Oil Pump 8 after pipe.
The course of work of supercritical carbon dioxide Brayton Cycle system is：
High-temperature supercritical carbon dioxide working medium enters the acting of carbon dioxide turbine 3, is converted to after converting heat into electric energy
Low-pressure supercritical carbon dioxide working medium, low-pressure supercritical carbon dioxide working medium are put after entering the cold side of carbon dioxide regenerator 4
Heat, cooled then into forecooler 5, cooled supercritical carbon dioxide working medium, which enters in compressor 6, to be pressurized, after supercharging
Supercritical carbon dioxide working medium enter carbon dioxide regenerator 4 heat absorbing side heat absorption, absorb waste heat after overcritical titanium dioxide
Carbon working medium is again introduced into heat absorption in solar thermal collector 1 and boiler 2 and forms high-temperature supercritical carbon dioxide working medium.
The course of work of middle low temperature organic rankine cycle system is：
Conduction oil directly exports after entering the cold side heat release of heater 9, and organic working medium is inhaled in the heat absorbing side of heater 9
Heat release of doing work is entered in organic working medium turbine 10 after receiving heat, and the organic working medium after heat release is put through organic working medium regenerator 11
The working medium side that condenser 12 is entered after hot side is condensed into liquid, and the organic working medium of liquid enters after 13 supercharging of organic working medium pump
Heat absorbing side to organic working medium regenerator 11 is absorbed heat, and the heat absorbing side for then entering back into heater 9 absorbs heat, completes to be circulated throughout
Journey.
The supercritical carbon dioxide and organic Rankine cogeneration method of complementary type of the present invention include the following steps：
When the heat that solar thermal collector 1 is collected disclosure satisfy that the minimum load operation of middle low temperature organic rankine cycle system
And when accumulation of heat heat, then boiler 2 is closed, is closed entrance and the outlet of boiler 2, it is low in simultaneously switch off middle low-temperature heat accumulating system 7
Contact between warm organic rankine cycle system, the high-temperature supercritical carbon dioxide working medium that solar thermal collector 1 exports enter
In supercritical carbon dioxide Brayton Cycle system, and the acting power generation heat release in supercritical carbon dioxide Brayton Cycle system
Supercritical carbon dioxide working medium is formed, while conduction oil is heated by heat exchange, supercritical carbon dioxide working medium enters
High-temperature supercritical carbon dioxide working medium is formed to heat absorption in solar thermal collector 1；Conduction oil after heating is low in having respectively entered
In intermediate temperature regenerator system 7 and in middle low temperature organic rankine cycle system, conduction oil enters back into middle low-temperature heat accumulating system 7 after heat release
To exchanging heat in supercritical carbon dioxide Brayton Cycle system, conduction oil after middle low temperature organic rankine cycle system heat release again into
Enter into supercritical carbon dioxide Brayton Cycle system and exchanges heat；
The heat of accumulation is stored when night solar thermal collector 1 does not collect heat, and in middle low-temperature heat accumulating system (7)
When amount, then disconnect solar thermal collector 1, in disconnection low-temperature heat accumulating system 7 and supercritical carbon dioxide Brayton Cycle system it
Between contact, open boiler 2, boiler 2 according to the minimum load operation of carbon dioxide Brayton Cycle system require combusts fossil
The energy, the high-temperature supercritical carbon dioxide working medium that boiler 2 exports enter in supercritical carbon dioxide Brayton Cycle system, and
It does work to generate electricity heat release and carry out heat exchange to conduction oil in supercritical carbon dioxide Brayton Cycle system and forms overcritical dioxy
Change carbon working medium, supercritical carbon dioxide working medium enters heat absorption in boiler 2 and forms high-temperature supercritical carbon dioxide working medium；In simultaneously
Enter after the conduction oil confluence that the conduction oil that low-temperature heat accumulating system 7 exports is exported with supercritical carbon dioxide Brayton Cycle system
To heat release in middle low temperature organic rankine cycle system, middle low-temperature heat accumulating system 7 and supercritical carbon dioxide cloth are then entered back into
It absorbs heat in the thunder circulatory system；
When solar thermal collector 1 can collect heat, but the heat collected cannot meet in low temperature Organic Rankine Cycle system
When the minimum load operation of system and accumulation of heat heat, then so that boiler 2 is worked normally, it is low in simultaneously switch off middle low-temperature heat accumulating system 7
Contact between warm organic rankine cycle system, the high-temperature supercritical carbon dioxide working medium that solar thermal collector 1 exports and boiler 2
It is entered in supercritical carbon dioxide Brayton Cycle system after the high-temperature supercritical carbon dioxide working medium confluence of output, and super
Acting power generation heat release forms supercritical carbon dioxide working medium in critical carbon dioxide Brayton Cycle system, while passing through heat exchange
Conduction oil is heated, supercritical carbon dioxide working medium enters in solar thermal collector 1 and boiler 2 heat absorption, and to form high temperature super
Critical 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 system, conduction oil enters back into supercritical carbon dioxide Brayton Cycle system in middle low-temperature heat accumulating system 7 after heat release
Middle heat exchange, conduction oil enter back into supercritical carbon dioxide Brayton cycle system after middle low temperature organic rankine cycle system heat release
It exchanges heat in system.
When solar thermal collector 1 does not also collect heat on daytime, then solar thermal collector 1 and middle low-temperature heat accumulating system are disconnected
System 7, then day and night be switched on boiler 2, the high-temperature supercritical carbon dioxide working medium that boiler 2 exports enters overcritical dioxy
Change in carbon Brayton Cycle system, and the acting power generation heat release and to conduction oil in supercritical carbon dioxide Brayton Cycle system
It carries out heat exchange and forms supercritical carbon dioxide working medium, supercritical carbon dioxide working medium enters heat absorption in boiler 2, and to form high temperature super
Critical carbon dioxide working medium；It is organic that the conduction oil of supercritical carbon dioxide Brayton Cycle system output simultaneously enters middle low temperature
Then heat release in Rankine cycle system is entered back into supercritical carbon dioxide Brayton Cycle system and is absorbed heat.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not limited to this hair
Bright, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection domain within.
Claims (3)
1. the supercritical carbon dioxide and organic Rankine combined generating system of a kind of complementary type, which is characterized in that including solar energy
Heat collector (1), boiler (2), supercritical carbon dioxide Brayton Cycle system, middle low-temperature heat accumulating system and middle low temperature organic Rankine
The circulatory system；
The outlet of solar thermal collector (1) and the outlet of boiler (2) are super with supercritical carbon dioxide Brayton Cycle system
Critical carbon dioxide working medium entrances are connected, and the supercritical carbon dioxide working medium of supercritical carbon dioxide Brayton Cycle system goes out
Mouth is connected with the entrance of the entrance of solar thermal collector (1) and boiler (2), supercritical carbon dioxide Brayton Cycle system
Conduction oil outlet is connected with the heat conducting oil inlet of the temperature end of middle low-temperature heat accumulating system (7) and middle low temperature organic rankine cycle system
It is logical, the low-temperature end of middle low-temperature heat accumulating system (7) and the conduction oil outlet of middle low temperature organic rankine cycle system and overcritical dioxy
The heat conducting oil inlet for changing carbon Brayton Cycle system is connected；
The temperature end of middle low-temperature heat accumulating system (7) is connected with the heat conducting oil inlet of middle low temperature organic rankine cycle system, in it is low
The low-temperature end of intermediate temperature regenerator system (7) is connected with the conduction oil outlet of middle low temperature organic rankine cycle system；
Supercritical carbon dioxide Brayton Cycle system includes carbon dioxide turbine (3), carbon dioxide regenerator (4), forecooler
(5) and compressor (6), the entrance phase of the outlet of solar thermal collector (1) and the outlet and carbon dioxide turbine (3) of boiler (2)
Connection, the outlet of carbon dioxide turbine (3) are connected with the heat release side entrance of carbon dioxide regenerator (4), carbon dioxide backheat
The heat release side outlet of device (4) is connected with the heat release side entrance of forecooler (5), the heat release side outlet and compressor of forecooler (5)
(6) entrance is connected, and the outlet of compressor (6) is connected with the heat absorption side entrance of carbon dioxide regenerator (4), carbon dioxide
The heat absorption side outlet of regenerator (4) is connected with the entrance of the entrance of solar thermal collector (1) and boiler (2)；
Temperature end and middle low temperature organic rankine cycle system of the heat absorption side outlet of forecooler (5) with middle low-temperature heat accumulating system (7)
Heat conducting oil inlet be connected, the low-temperature end of middle low-temperature heat accumulating system (7) and the conduction oil of middle low temperature organic rankine cycle system
Outlet is connected with the heat absorption side entrance of forecooler (5)；
The middle low temperature organic rankine cycle system includes heater (9), organic working medium turbine (10), organic working medium regenerator
(11) and condenser (12), the working medium side outlet of heater (9) are connected with the entrance of organic working medium turbine (10), organic working medium
The outlet of turbine (10) is connected with the heat release side entrance of organic working medium regenerator (11), the heat release of organic working medium regenerator (11)
Side outlet is connected with the working medium side entrance of condenser (12), working medium side outlet and the organic working medium regenerator of condenser (12)
(11) heat absorption side entrance is connected, the working medium side entrance of the heat absorption side outlet and heater (9) of organic working medium regenerator (11)
It is connected；
The conduction oil side entrance of heater (9) and the conduction oil outlet of supercritical carbon dioxide Brayton Cycle system and middle low temperature
The temperature end of hold over system (7) is connected, conduction oil side outlet and the supercritical carbon dioxide Brayton cycle system of heater (9)
The low-temperature end of the heat conducting oil inlet of system and middle low-temperature heat accumulating system (7) is connected；
The working medium side outlet of condenser (12) pumps (13) with the heat absorption side entrance of organic working medium regenerator (11) by organic working medium
It is connected.
2. the supercritical carbon dioxide and organic Rankine combined generating system of complementary type according to claim 1, feature
Be, the low-temperature end of middle low-temperature heat accumulating system (7) and the conduction oil outlet of middle low temperature organic rankine cycle system by pipeline simultaneously
It is connected with the heat conducting oil inlet of supercritical carbon dioxide Brayton Cycle system by Heat-transfer Oil Pump (8) after pipe.
3. the supercritical carbon dioxide and organic Rankine cogeneration method of a kind of complementary type, which is characterized in that wanted based on right
The supercritical carbon dioxide and organic Rankine combined generating system for seeking the complementary type described in 1, include the following steps：
When solar thermal collector (1) collect heat disclosure satisfy that middle low temperature organic rankine cycle system minimum load operation and
When accumulation of heat heat, then close boiler (2), be closed entrance and the outlet of boiler (2), simultaneously switch off middle low-temperature heat accumulating system (7) with
Contact between middle low temperature organic rankine cycle system, the high-temperature supercritical carbon dioxide working medium of solar thermal collector (1) output
It enters in supercritical carbon dioxide Brayton Cycle system, and the hair that does work in supercritical carbon dioxide Brayton Cycle system
Electric heat release forms supercritical carbon dioxide working medium, while being heated to conduction oil by heat exchange, supercritical carbon dioxide work
Matter enters heat absorption in solar thermal collector (1) and forms high-temperature supercritical carbon dioxide working medium；Conduction oil after heating respectively into
Enter into middle low-temperature heat accumulating system (7) and in middle low temperature organic rankine cycle system, conduction oil is in middle low-temperature heat accumulating system (7)
It enters back into supercritical carbon dioxide Brayton Cycle system and exchanges heat after heat release, conduction oil is in middle low temperature Organic Rankine Cycle system
It enters back into supercritical carbon dioxide Brayton Cycle system and exchanges heat after system heat release；
The heat of accumulation is stored when night solar thermal collector (1) does not collect heat, and in middle low-temperature heat accumulating system (7)
When, then solar thermal collector (1) is disconnected, in disconnection between low-temperature heat accumulating system (7) and carbon dioxide Brayton Cycle system
Contact, opens boiler (2), and boiler (2) requires combusts fossil according to the minimum load operation of carbon dioxide Brayton Cycle system
The high-temperature supercritical carbon dioxide working medium of the energy, boiler (2) output enters in supercritical carbon dioxide Brayton Cycle system,
And it does work to generate electricity heat release and carry out heat exchange to conduction oil in supercritical carbon dioxide Brayton Cycle system and forms overcritical two
Carbonoxide working medium, supercritical carbon dioxide working medium enter heat absorption in boiler (2) and form high-temperature supercritical carbon dioxide working medium；Together
When in the conduction oil of conduction oil and supercritical carbon dioxide Brayton Cycle system output that exports of low-temperature heat accumulating system (7) converge
After enter heat release in middle low temperature organic rankine cycle system, then enter back into middle low-temperature heat accumulating system (7) and overcritical two
It absorbs heat in carbonoxide Brayton Cycle system；
When solar thermal collector (1) can collect heat, but the heat collected cannot meet in low temperature organic rankine cycle system
Minimum load operation and when accumulation of heat heat, then so that boiler (2) is worked normally, simultaneously switch off middle low-temperature heat accumulating system (7) in
Contact between low temperature organic rankine cycle system, solar thermal collector (1) output high-temperature supercritical carbon dioxide working medium with
Supercritical carbon dioxide Brayton Cycle system is entered after the high-temperature supercritical carbon dioxide working medium confluence of boiler (2) output
In, and acting power generation heat release forms supercritical carbon dioxide working medium in supercritical carbon dioxide Brayton Cycle system, simultaneously
Conduction oil is heated by heat exchange, supercritical carbon dioxide working medium enters in solar thermal collector (1) and boiler (2)
Heat absorption forms high-temperature supercritical carbon dioxide working medium；Conduction oil after heating have respectively entered in middle low-temperature heat accumulating system (7) and
In middle low temperature organic rankine cycle system, conduction oil enters back into overcritical dioxy in middle low-temperature heat accumulating system (7) after heat release
Change and exchange heat in carbon Brayton Cycle system, conduction oil enters back into overcritical two after middle low temperature organic rankine cycle system heat release
It exchanges heat in carbonoxide Brayton Cycle system；
When solar thermal collector on daytime (1) does not collect heat, then solar thermal collector (1) and middle low-temperature heat accumulating system are disconnected
(7), then day and night is switched on boiler (2), and the high-temperature supercritical carbon dioxide working medium that boiler (2) exports enters overcritical
In carbon dioxide Brayton Cycle system, and the acting power generation heat release and to leading in supercritical carbon dioxide Brayton Cycle system
Deep fat carries out heat exchange and forms supercritical carbon dioxide working medium, and supercritical carbon dioxide working medium enters heat absorption in boiler (2) and formed
High-temperature supercritical carbon dioxide working medium；The conduction oil of supercritical carbon dioxide Brayton Cycle system output simultaneously is low in entering
Then heat release in warm organic rankine cycle system is entered back into supercritical carbon dioxide Brayton Cycle system and is absorbed heat.
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| CN106287657B (en) * | 2016-09-14 | 2018-06-22 | 西安热工研究院有限公司 | Supercritical carbon dioxide Bretton and organic Rankine combined cycle thermal power generation system |
| CN106640416A (en) * | 2016-11-28 | 2017-05-10 | 哈尔滨工程大学 | Low speed marine diesel engine EGR cooler S-CO2 and ORC combined cycle waste heat utilization system |
| CN109695554A (en) * | 2018-03-28 | 2019-04-30 | 中电华创(苏州)电力技术研究有限公司 | One kind being based on supercritical CO2The solar chp system of Brayton cycle |
| CN109083706A (en) * | 2018-08-07 | 2018-12-25 | 西安热工研究院有限公司 | A kind of supercritical carbon dioxide hot dry rock electricity generation system with carbon dioxide sequestration |
| CN110566297A (en) * | 2019-07-29 | 2019-12-13 | 中国船舶重工集团公司第七一九研究所 | Supercritical carbon dioxide Brayton cycle system |
| CN110594111A (en) * | 2019-10-25 | 2019-12-20 | 北京理工大学 | Solar transcritical carbon dioxide Rankine cycle and compressed air energy storage coupling system |
| CN110863961B (en) * | 2019-11-28 | 2021-08-31 | 西安石油大学 | Supercritical CO2Recompression brayton and LNG combined cycle power generation system |
| CN111287813A (en) * | 2020-02-26 | 2020-06-16 | 中国华能集团清洁能源技术研究院有限公司 | Solar supercritical carbon dioxide triple-cycle power generation system and method |
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