CN110886629A - System and method for realizing thermoelectric decoupling by using photo-thermal - Google Patents
System and method for realizing thermoelectric decoupling by using photo-thermal Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 80
- 238000005482 strain hardening Methods 0.000 claims abstract description 34
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 150000003839 salts Chemical class 0.000 claims description 16
- 239000002608 ionic liquid Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 6
- 238000005338 heat storage Methods 0.000 claims description 4
- 238000009835 boiling Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/006—Methods of steam generation characterised by form of heating method using solar heat
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides a system and a method for realizing thermoelectric decoupling by utilizing photo-thermal, which utilize a working medium pump to convey working media in a cold working medium storage station to a heat collector, wherein the working media absorb heat through the heat collector to form high-temperature fluid which is sent to a hot working medium storage station under the action of pump pressure. The flow of the hot working medium entering the heat exchanger is controlled by a flow control valve, the feed water with the temperature lower than 100 ℃ is heated, the generated steam with higher temperature enters the heat exchange station to supply heat to a hot user, and the working medium with the temperature lower than 100 ℃ after being cooled flows back to the cold working medium storage station. Because part of the steam in the heat supply steam comes from the new heating steam of the photo-thermal system, the heat supply amount from the back pressure machine is reduced, and therefore the electric load is synchronously reduced, the back pressure turbine is enabled to participate in the peak regulation of the power grid in the heat supply mode, the heat load can be regulated by utilizing the accumulated heat of the working medium storage station, so that the electric load is regulated, and the frequency regulation is rapidly participated. Under the condition that the heat collecting plates do not work, the hot working medium in the hot working medium storage station can be used for heating the feed water, so that auxiliary heat supply is carried out, and the peak-regulating and frequency-modulating capacity of the unit is provided.
Description
Technical Field
The invention relates to a thermal power generation control system, in particular to a system and a method for realizing thermoelectric decoupling by utilizing photo-thermal.
Background
The power industry is the foundation of national economy. Along with the change of the electricity demand and the electricity utilization structure of power consumers in China, the day and night peak-valley difference of the electricity utilization is gradually increased, and the peak-valley difference can reach 30% -40% of the peak load of power generation, so that great pressure is brought to peak regulation of a power grid and frequency modulation of a unit. For a cogeneration unit, the unit electrical load is limited by heat supply and cannot participate in unit peak regulation, so that the peak regulation pressure of a power grid is increased, and the situation of wind abandoning and light abandoning is further increased.
Chinese patent 201210543440.2 discloses a heat utilization system and method for realizing the combination of solar photo-thermal technology and thermal power plant, the system uses solar energy generated by solar collector mobile phone as medium-high temperature heat energy, which is used as the driving heat source of absorption heat pump, extracts the circulating water waste heat of condenser, and replaces the low-pressure steam extraction of steam turbine as the heating heat source of low-pressure condensed water. However, the system only realizes the photo-thermal resource utilization and cannot help the peak regulation of the unit.
Chinese patent 201710843018.1 discloses a method for selecting a peak regulation mode of a fused salt tower type photothermal unit based on output characteristics, and the method calculates the cost of two peak regulation methods of output reduction peak regulation and start-stop peak regulation according to the peak regulation time period and the original output characteristics of the fused salt tower type photothermal unit, so as to obtain a more economic operation mode.
The method can not reduce the electric load of the steam turbine under the same heat supply requirement, so that the back pressure unit can participate in the peak shaving of the power grid, and the thermoelectric decoupling is realized.
Disclosure of Invention
The invention aims to provide a system and a method for realizing thermoelectric decoupling by utilizing photo-thermal to solve the problems that a back pressure type heat supply unit does not participate in peak regulation, heat supply parameters are not adjustable and the like, so that the thermoelectric decoupling is favorably realized.
In order to achieve the above object, the present invention provides a system for implementing thermal-electrical decoupling by using photo-thermal, comprising:
the heat collector is used for focusing sunlight and collecting heat;
a hot working medium storage station having one end connected to the other end of the heat collector;
one end of the cold working medium storage station is connected with the other end of the heat collector through a working medium pump and a working medium adjusting valve; and
one end of the working medium circulation of the heat exchanger is connected with the other end of the hot working medium storage station, and the other end of the working medium circulation of the heat exchanger is connected with the other end of the cold working medium storage station; in addition, one end of the water circulation is connected with a water feeding pump of the back pressure type cogeneration unit so as to receive water from the water pump; the other end is connected with the exhaust end of a steam turbine of the back pressure type cogeneration unit and supplies air to the heat supply station together.
Furthermore, one end of the working medium circulation of the heat exchanger is connected with the other end of the hot working medium storage station through a flow control valve.
Further, the other end of the water circulation of the heat exchanger is connected with the exhaust end of a steam turbine of the back pressure type cogeneration unit through a heat supply outlet valve.
Furthermore, one end of the water circulation of the heat exchanger is connected with a water feeding pump of the back pressure type cogeneration unit through a cold water valve.
Further, the two media of the heat exchanger have independent loops and are not in direct contact.
Furthermore, the pressure of the working medium of the cold water valve is higher than that of the working medium of the heat supply outlet valve, and the cold water valve is connected with the outlet of the water supply pump or a tap of the water supply pump.
The invention also provides a method for realizing thermoelectric decoupling by using photo-thermal, which comprises the following steps:
focusing and collecting heat of sunlight by using a heat collector;
connecting one end of a hot working medium storage station with one end of the heat collector;
one end of the cold working medium storage station is connected with the other end of the heat collector through a working medium pump and a working medium adjusting valve;
connecting one end of a working medium circulation of a heat exchanger with the other end of the hot working medium storage station, and connecting the other end of the working medium circulation of the heat exchanger with the other end of the cold working medium storage station; in addition, one end of the water circulation is connected with a water feeding pump of the back pressure type cogeneration unit, and the other end of the water circulation is connected with an exhaust end of a steam turbine of the back pressure type cogeneration unit, so that the steam is sent to a heat supply station together.
Furthermore, one end of the working medium circulation of the heat exchanger is connected with the other end of the hot working medium storage station through a flow control valve, and the other end of the working medium circulation of the heat exchanger is connected with the cold working medium storage station.
Furthermore, the pressure of the working medium of the cold water valve is higher than that of the working medium of the heat supply outlet valve, and the cold water valve is connected with the outlet of the water supply pump or a tap of the water supply pump.
Further, one end of the water circulation of the heat exchanger is connected with a water feeding pump of the back pressure type cogeneration unit through a cold water valve so as to receive water from the water pump.
Further, the two media of the heat exchanger have independent loops and are not in direct contact.
Furthermore, the cold working medium storage station and the hot working medium storage station are independently configured and have heat storage capacity, so that the heat collecting plates and the heat exchangers with even numbers can be operated in a staggered mode, and the requirements of all-weather peak regulation and frequency modulation are met.
Furthermore, working media of the cold working medium storage station and the hot working medium storage station are non-phase-change liquid with boiling points higher than the temperature of the heating steam, and preferably molten salt and ionic liquid (kCl, kOH and the like).
The invention provides a method for realizing thermoelectric decoupling by utilizing photo-thermal, which is characterized in that a working medium in a cold working medium storage station is conveyed to a heat collector through a working medium pump, and the working medium absorbs heat through the heat collector to form high-temperature fluid which is sent to a hot working medium storage station under the action of pump pressure. The flow of the hot working medium entering the heat exchanger is controlled by the flow control valve, the feed water is heated, the generated steam enters the heat exchange station to supply heat to a hot user, and the cooled working medium flows back to the cold working medium storage station. Because a part of the heat supply comes from the new heating steam of the photo-thermal system, the heat supply from a back pressure machine of the back pressure type cogeneration unit is reduced, and therefore, the electric load is synchronously reduced, thereby realizing that the back pressure type steam turbine participates in the peak shaving of the power grid in the heat supply mode. Under the condition that the heat collector does not work, the hot working medium in the hot working medium storage station can be used for heating the water supply to perform auxiliary heat supply, and the peak-load and frequency-modulation capacity of the unit is provided.
Drawings
FIG. 1 is a schematic diagram of a system for thermo-electric decoupling using photothermal according to the present invention;
description of reference numerals:
1. a heat collector; 2. a hot working medium storage station; 3. a flow control valve; 4. a cold working medium storage station; 5. a working medium pump; 6. a working medium regulating valve; 7. a heating outlet valve; 8. a heat exchanger; 9. a utility boiler; 10. a steam turbine; 11. a generator; 12. a heat supply station; 13. a hot user; 14. a thermodynamic cycle pump; 15. a coagulation pump; 16. a deaerator; 17. a feed pump; 18. a heater; 19. a cold water valve.
Detailed Description
The system for realizing thermoelectric decoupling by using photo-thermal according to the present invention is described in detail below with reference to the accompanying drawings.
Referring to fig. 1, the system for realizing thermoelectric decoupling by using photo-thermal is specially applied to a back pressure type heat supply unit, and mainly comprises a heat collector 1, a hot working medium storage station 2, a cold working medium storage station 4, a working medium pump 5, a heat exchanger 8, a flow control valve 3, a working medium regulating valve 6 and a heat supply outlet valve 7. The back pressure type heat supply unit is composed of a boiler 9, a steam turbine 10, a generator 11, a condensate pump 15, a heater 16, a water supply pump 17 and a heater 18, wherein steam discharged by the steam turbine 10 enters a heat supply station 1213 to supply heat to a heat user 13 through a heat circulating pump 14.
The heat collector 1 is a sunlight focusing heat collecting device, can be a tower type, groove type or disc type heat collecting sheet, and is provided with a bypass pipeline, a sun tracking system and a control system. The photo-thermal working medium of the heat collector 1 is fused salt and ionic liquid (kCl, kOH and the like) with the boiling point higher than the temperature of the heat supply steam.
The hot working medium storage station 2 and the cold working medium storage station 4 can be provided with a safety valve and a liquid level meter on the shell, the safety valve is used for discharging pressure of the shell, and the liquid level meter is used for monitoring heat storage capacity. The shell is provided with a heat insulation layer. The hot working medium storage station 2 and the cold working medium storage station 4 are arranged at different elevations, the hot working medium storage station 2 is arranged at a high position, the cold working medium storage station 4 is arranged at a low position, and the connecting pipeline is provided with the flow control valve 3 to ensure the circulating flow of the photo-thermal working medium.
The heat exchanger 8 is a heat exchange medium with two working media in indirect contact, the two working media are a photo-thermal working medium for absorbing photo-thermal energy and a water supply of the generator set respectively, the photo-thermal working medium releases heat, the temperature is reduced, and the water supply absorbs the heat to generate steam.
Referring to fig. 1 again, a boiler 9, a steam turbine 10, a generator 11, a condensate pump 15, a heater 16, a feed pump 17 and a heater 18 form a back pressure type cogeneration unit, the feed pump 17 takes out one path of water to pump into a heat exchanger 8 to generate steam, the steam is mixed with steam discharged by the steam turbine and then enters a heat supply station 12, and a cold water valve 19 is arranged on a feed pump head.
One end of the hot working medium storage station 2 is connected with the other end of the heat collector 1. One end of the cold working medium storage station 4 is connected with the other end of the heat collector 1 through a working medium pump 5 and a working medium adjusting valve 6;
one end of the working medium circulation of the heat exchanger 8 is connected with the other end of the hot working medium storage station 2, and the other end is connected with the other end of the cold working medium storage station 4; in addition, one end of the water circulation is connected with a water feeding pump 17 of the back pressure type cogeneration unit through a cold water valve 19 so as to receive water in the water pump 17; the other end is connected with the exhaust end of a steam turbine 10 of the back pressure type cogeneration unit, and the exhaust end supplies air to a heat supply station 12. Through the heating plant 12
One end of the working medium circulation of the heat exchanger 8 is connected with the other end of the hot working medium storage station 2 through the flow control valve 3. The other end of the water circulation of the heat exchanger 8 is connected to the exhaust end of a steam turbine 10 of the back pressure cogeneration unit through a heat supply outlet valve 7.
The first embodiment is as follows:
the photo-thermal working medium adopts fused salt, the internal temperature of the cold fused salt storage station is 180-200 ℃, and the internal temperature of the hot fused salt storage station is 420-450 ℃.
And the hot working medium storage station 2 and the cold working medium storage station 4 are provided with a safety valve and a liquid level meter on the shell, the safety valve is used for discharging pressure of the shell, and the liquid level meter is used for monitoring heat storage capacity. The shell is provided with a heat insulation layer. The hot working medium storage station 2 and the cold working medium storage station 4 are arranged at different elevations, the hot working medium storage station 2 is arranged at a high position, the cold working medium storage station 4) is arranged at a low position, and a flow control valve 3 is arranged on a connecting pipeline.
When the sunlight intensity is high, the molten salt is conveyed through the molten salt pump, the flow control valve (3) is fully opened, and the flow of the molten salt entering the heat exchanger 8 is controlled by the rotating speed of the molten salt pump; when the sunlight is weak or no light, the molten salt pump is turned off or stopped, and the flow of the molten salt entering the heat exchanger 8 is controlled by adjusting the opening degree of the flow control valve 3 by utilizing the physical high-low potential difference between the hot working medium storage station 2 and the cold working medium storage station 4.
Preferably, the present embodiment employs a molten salt axial flow pump.
Preferably, the heat exchanger 8 is provided with an exhaust valve and a drain valve for overpressure protection and start-stop drainage.
Preferably, thermometers are arranged on the fused salt pipelines at the inlet and the outlet of the heat exchanger 8, a certain temperature safety interval is kept, and an alarm is arranged.
The water supply pump 17 takes out a path of water with the temperature of 150-170 ℃, pumps the water into the heat exchanger 8 to generate steam with the temperature of 300-400 ℃, the steam is mixed with the steam discharged by the steam turbine and then enters the heat supply station 12, and a cold water valve 19 is arranged on a pumping head of the water supply pump.
Preferably, a pressure adapter is arranged at the position where the steam at the outlet of the heat exchanger 8 is mixed with the exhaust steam of the steam turbine 10.
The second implementation:
the photo-thermal working medium is ionic liquid, the internal temperature of the cold working medium storage station is 0-100 ℃, and the internal temperature of the hot working medium storage station is 250-300 ℃.
When the sunlight intensity is high, the ionic liquid is conveyed through the ionic liquid pump, the flow control valve (3) is fully opened, and the flow of the working medium entering the heat exchanger 8 is controlled by the rotating speed of the ionic liquid pump; when the sunlight is weak or no light, the ionic liquid pump is turned off or stopped, and the working medium flow entering the heat exchanger 8 is controlled by adjusting the opening of the flow control valve 3 by utilizing the physical high-low potential difference between the hot working medium storage station 2 and the cold working medium storage station 4.
Preferably, the heat exchanger 8 is provided with an exhaust valve and a drain valve for overpressure protection and start-stop drainage.
A path of water with the temperature of less than 100 ℃ is taken out from a main pipe at the outlet of the condensate pump 17, pumped into the heat exchanger 8 to generate steam with the temperature of 250-300 ℃, the steam is mixed with the steam discharged by the steam turbine and then enters the heat supply station 12, and a cold water valve 19 is arranged on a pumping head of the water supply pump.
Preferably, a pressure adapter is arranged at the position where the steam at the outlet of the heat exchanger 8 is mixed with the exhaust steam of the steam turbine 10.
The working process of the system for realizing thermoelectric decoupling by utilizing photo-thermal provided by the invention is as follows:
the working medium pump conveys the ionic liquid in the cold working medium storage station to the heat collector, and the working medium absorbs heat through the heat collector to form high-temperature fluid at 250-300 ℃ and is conveyed to the hot working medium storage station under the action of pump pressure. The flow of the hot working medium entering the heat exchanger is controlled through a flow control valve, the feed water with the temperature lower than 100 ℃ is heated, the generated steam with the temperature of 250-300 ℃ enters the heat exchange station to supply heat to a hot user, and the cooled ionic liquid with the temperature lower than 100 ℃ flows back to the cold working medium storage station. Because part of the steam in the heat supply steam comes from the new heating steam of the photo-thermal system, the heat supply amount from the back pressure machine is reduced, and therefore the electric load is synchronously reduced, the back pressure turbine is enabled to participate in the peak shaving of the power grid in the heat supply mode, the heat load can be adjusted by utilizing the accumulated heat of the ionic liquid in the working medium storage station, so that the electric load is adjusted, and the frequency modulation is rapidly participated. Under the condition that the heat collecting plates do not work, the hot working medium in the hot working medium storage station can be used for heating the feed water, so that auxiliary heat supply is carried out, and the peak-regulating and frequency-modulating capacity of the unit is provided.
The invention has the following beneficial effects:
the invention is applied to a heating system of a photo-thermal and back pressure type unit, light energy is converted into heat energy by utilizing the configuration of the heating system of the thermal power unit, the electric load of a steam turbine is reduced under the same heating demand, and the back pressure type unit can participate in peak shaving of a power grid to realize thermoelectric decoupling.
Controlling the flow rate of the photo-thermal working medium and the flow rate of water supply, and if the heat supply temperature is higher, reducing the flow rate of the working medium and increasing the flow rate of the water supply; if the heat supply temperature is lower, the working medium flow can be increased, and the water supply flow can be properly reduced. Thereby adjusting the temperature of the heating steam and improving the flexibility of heating.
The double-photo-thermal working medium tank is arranged, so that the heat supply stability can be obviously improved, the defect of large light fluctuation can be overcome, and heat can be supplied when no light exists.
The photothermal heat supply steam comes from water supply and returns to the condensed water, and the thermodynamic system of the back pressure unit is not influenced.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (13)
1. System for the thermo-electric decoupling by means of photo-thermal, characterized in that it comprises:
a heat collector (1) for focusing sunlight and collecting heat;
a hot working medium storage station (2) with one end connected with one end of the heat collector (1);
one end of the cold working medium storage station (4) is connected with the other end of the heat collector (1) through a working medium pump (5) and a working medium adjusting valve (6);
one end of the working medium circulation of the heat exchanger (8) is connected with the other end of the hot working medium storage station (2), and the other end of the working medium circulation of the heat exchanger is connected with the other end of the cold working medium storage station (4); in addition, one end of the water circulation is connected with a water supply pump (17) of the back pressure type cogeneration unit so as to receive water in the water pump (17), and the other end is connected with an exhaust end of a steam turbine (10) of the back pressure type cogeneration unit and supplies the air to the heat supply station (12).
2. The system for realizing thermoelectric decoupling by using photothermal according to claim 1, wherein one end of the working medium circulation of the heat exchanger (8) is connected to the other end of the hot working medium storage station (2) through a flow control valve (3), and the other end is connected to the cold working medium storage station (4).
3. The system for decoupling heat and power by means of light and heat according to claim 1, characterized in that the other end of the water circulation of the heat exchanger (8) is connected to the exhaust end of the steam turbine (10) of the back pressure cogeneration unit through a heat supply outlet valve (7).
4. The system for decoupling heat and power by means of light and heat according to claim 1, characterized in that one end of the water circulation of the heat exchanger (8) is connected to a feed pump (17) of a back-pressure cogeneration unit via a cold water valve (19) to receive water from the pump (17).
5. A system for thermo-electric decoupling using light and heat according to claim 1, characterised in that the two media of the heat exchanger (8) have independent circuits and are not in direct contact.
6. The system for realizing thermoelectric decoupling by utilizing photothermal as claimed in claim 1, wherein the working medium pressure of the cold water valve (19) is higher than that of the heat supply outlet valve (7), and the cold water valve (19) is connected with the outlet of the water feed pump (17) or a tap of the water feed pump (17).
7. A method for realizing thermoelectric decoupling by using photo-thermal is characterized by comprising the following steps:
the solar light is focused and collected by using the heat collector (1);
one end of the hot working medium storage station (2) is connected with one end of the heat collector (1);
one end of a cold working medium storage station (4) is connected with the other end of the heat collector (1) through a working medium pump (5) and a working medium regulating valve (6);
one end of a working medium circulation of a heat exchanger (8) is connected with the other end of the hot working medium storage station (2), and the other end of the working medium circulation is connected with the other end of the cold working medium storage station (4); in addition, one end of the water circulation is connected with a water feeding pump (17) of the back pressure type cogeneration unit, and the other end is connected with an exhaust end of a steam turbine (10) of the back pressure type cogeneration unit, and the steam is sent to a heat supply station (12) together.
8. The method for realizing thermoelectric decoupling by using photothermal according to claim 7, characterized in that one end of the working medium circulation of the heat exchanger (8) is connected to the other end of the hot working medium storage station (2) through a flow control valve (3), and the other end is connected to the cold working medium storage station (4).
9. The method for realizing thermoelectric decoupling by utilizing photothermal as claimed in claim 7, wherein the working medium pressure of the cold water valve (19) is higher than that of the heat supply outlet valve (7), and the cold water valve (19) is connected with the outlet of the water feed pump (17) or a tap of the water feed pump (17).
10. The method for thermo-electric decoupling using light and heat according to claim 7, wherein one end of the water circulation of the heat exchanger (8) is connected to a feed water pump (17) of a back pressure cogeneration unit through a cold water valve (19) to receive water from the water pump (17).
11. A method for thermo-electric decoupling using light and heat according to claim 7, characterised in that the two media of the heat exchanger (8) have separate circuits and are not in direct contact.
12. The method for realizing thermoelectric decoupling by utilizing photo-thermal according to claim 7, wherein the cold working medium storage station (1) and the hot working medium storage station (2) are independently configured and have heat storage capacity, so that the heat collecting sheets (1) and the heat exchanger (8) can be operated in a staggered manner, and the requirements of all-weather peak regulation and frequency modulation are met.
13. The method for realizing thermoelectric decoupling by using photo-thermal according to claim 7, characterized in that the working fluids of the cold working fluid storage station (4) and the hot working fluid storage station (2) are non-phase-change liquids with boiling points higher than the temperature of the heating steam, preferably molten salts and ionic liquids.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112762424A (en) * | 2021-01-07 | 2021-05-07 | 中国船舶重工集团新能源有限责任公司 | Solar thermoelectric coupling system based on combination of heat storage and compression heat pump and operation method thereof |
| CN114251142A (en) * | 2021-12-14 | 2022-03-29 | 西安热工研究院有限公司 | Elastic heat storage type rapid peak regulation and medium-pressure heating system and method |
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