CN111322660A - Supercritical carbon dioxide circulating cogeneration system and method of integrated absorption heat pump - Google Patents
Supercritical carbon dioxide circulating cogeneration system and method of integrated absorption heat pump Download PDFInfo
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- CN111322660A CN111322660A CN202010164745.7A CN202010164745A CN111322660A CN 111322660 A CN111322660 A CN 111322660A CN 202010164745 A CN202010164745 A CN 202010164745A CN 111322660 A CN111322660 A CN 111322660A
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 94
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 47
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 47
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000001105 regulatory effect Effects 0.000 claims abstract description 45
- 238000010248 power generation Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims description 47
- 239000006096 absorbing agent Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims 1
- 239000002918 waste heat Substances 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
- F01K25/10—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours the vapours being cold, e.g. ammonia, carbon dioxide, ether
- F01K25/103—Carbon dioxide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
- F24D2200/126—Absorption type heat pumps
Abstract
A supercritical carbon dioxide circulation combined heat and power generation system and method of an integrated absorption heat pump comprises a supercritical carbon dioxide power generation system and a heat supply system, wherein the supercritical carbon dioxide power generation system comprises a main compressor, a secondary compressor, a low-temperature heat regenerator, a high-temperature heat regenerator, a boiler, a turbine and a precooler, and the heat supply system comprises a low-temperature heater, a high-temperature heater and an absorption heat pump. The flow regulating valve is adopted to regulate the flow of the carbon dioxide in the high-temperature heater, so that the proportion of thermal load and electric load can be flexibly regulated, and thermoelectric decoupling is realized; the absorption heat pump heat exchange is adopted between the primary pipe network and the secondary pipe network, so that the temperature of return water of the primary pipe network can be greatly reduced, and the heat supply capacity of the system is remarkably improved; the invention adopts the arrangement of the low-temperature heater and the high-temperature heater, realizes the graded utilization of energy according to quality, and can completely recover the low-quality waste heat at the cold end of the system and greatly improve the heat utilization efficiency with high energy because the temperature of the return water of the primary network is as low as about 25 ℃.
Description
Technical Field
The invention relates to the technical field of power generation, in particular to a supercritical carbon dioxide circulating cogeneration system and method of an integrated absorption heat pump.
Background
The cleanliness of new energy resources such as photovoltaic energy, wind power and the like is high, and the environmental pollution is small, so that the rapid development of the clean energy resources such as photovoltaic energy, wind power and the like has great significance for energy conservation and emission reduction in China. In recent years, the power generation proportion of new energy resources such as photovoltaic energy, wind power and the like in China is greatly increased, but the intermittent power generation characteristic of the new energy resources causes poor power output stability, and the phenomenon of wind and light abandonment is serious. Therefore, the consumption of a large amount of new energy puts higher requirements on the peak regulation capacity of the power grid in China. At present, coal-fired power generation is still the main power generation mode in China, and the operation flexibility of a coal-fired unit needs to be further improved to improve the peak load regulation capacity of a power grid. And the conventional coal-fired power generating unit has more steam extraction, higher system complexity and stronger thermoelectric coupling degree, thus leading to higher difficulty of thermoelectric decoupling of the coal-fired power generating unit and poorer flexibility of the power generating unit.
By virtue of the advantages of high thermal efficiency, compact structure, low investment, low operation and maintenance cost and the like, the supercritical carbon dioxide power cycle system attracts students to develop a great deal of research on the application of the supercritical carbon dioxide power cycle in the field of coal-fired power generation. Research shows that the supercritical carbon dioxide coal-fired power generation system has higher power generation efficiency and lower investment compared with a conventional coal-fired unit; the system has the advantages of high cold end temperature, certain heat supply capacity, no air extraction link and simple structure, and has high thermoelectric decoupling capacity.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a supercritical carbon dioxide circulation cogeneration system and a supercritical carbon dioxide circulation cogeneration method integrating an absorption heat pump.
In order to achieve the purpose, the invention adopts the technical scheme that:
a supercritical carbon dioxide circulation cogeneration system of an integrated absorption heat pump comprises a supercritical carbon dioxide power generation system and a heat supply system;
the supercritical carbon dioxide power generation system comprises a main compressor 1, wherein an outlet of the main compressor 1, a cold side inlet and outlet of a low-temperature heat regenerator 2, a cold side inlet and outlet of a high-temperature heat regenerator 3, an inlet and outlet of a boiler 4, an inlet and outlet of a turbine 5, a hot side inlet and outlet of the high-temperature heat regenerator 3, a hot side inlet and outlet of the low-temperature heat regenerator 2, an inlet and outlet of a low-temperature heat network heater bypass valve 8, an inlet and outlet of a precooler regulating valve 9, an inlet and outlet of; the inlet and outlet of the recompressor 12 are respectively communicated with the hot side outlet of the low-temperature heat regenerator 2 and the cold side outlet of the low-temperature heat regenerator 2; the outlet of the low-temperature heating network heater bypass valve 8 is communicated with the outlet of the precooler 10 through a precooler bypass valve 11;
the heat supply system comprises a low-temperature heat supply network heater 7, a high-temperature heat supply network heater 14 and an absorption heat pump, wherein the absorption heat pump is composed of a condenser 15, a throttle valve 16, an evaporator 17, an absorber 19 and a generator 21 which are sequentially communicated;
the hot side outlet of the high-temperature heat regenerator 3, the inlet and outlet of the high-temperature heat supply network heater regulating valve 13, the inlet and outlet of the hot side of the high-temperature heat supply network heater 14, the inlet and outlet of the low-temperature heat supply network heater regulating valve 6, the inlet and outlet of the hot side of the low-temperature heat supply network heater 7, the inlet and outlet of the precooler regulating valve 9 and the inlet of the precooler 10 are;
the inlet of the low-temperature heating network heater regulating valve 6 is communicated with the hot side outlet of the low-temperature heating network heater 7 through a low-temperature heating network heater bypass valve 8; the lower outlet of the evaporator 17 is communicated with the upper inlet of the generator 17 through a working medium pump 18; an outlet at the lower end of the absorber 19 is communicated with an inlet at the upper end of the generator 21 through a solution pump 20 and the cold side of a solution heat exchanger 22 in sequence; the outlet at the lower end of the generator 21 is communicated with the inlet at the upper end of the absorber 19 through the hot side of the solution heat exchanger 22 and the solution valve 23 in turn.
The generator 21, the evaporator 17, the low-temperature heating network heater 7 and the high-temperature heating network heater 14 are communicated in sequence along the circulation direction of primary network circulating water to form a primary network heat exchange system; the absorber 19 and the condenser 15 are communicated in sequence along the circulation direction of the secondary network circulating water to form a secondary network heating system.
The high-temperature heating network heater regulating valve 13 regulates the heat load by regulating the flow of carbon dioxide in the primary network heat exchange system.
The heat exchange between the primary network circulating water and the secondary network circulating water is realized through an absorption heat pump, and the primary network backwater is about 25 ℃.
A method for a supercritical carbon dioxide cycle cogeneration system of an integrated absorption heat pump, in a heating period, a high-temperature heat supply network heater regulating valve 13, a low-temperature heat supply network heater regulating valve 6 and a precooler bypass valve 11 are opened, a low-temperature heat supply network heater bypass valve 8 and a precooler regulating valve 1 are closed, a supercritical carbon dioxide working medium is boosted by a main compressor 1, then the supercritical carbon dioxide working medium absorbs heat in a low-temperature heat regenerator 2, a high-temperature heat regenerator 3 and a boiler 4 in sequence and then enters a turbine 5 to do work, exhaust gas of the turbine 5 is divided into two strands after releasing heat in the high-temperature heat regenerator 3, the two strands respectively enter the low-temperature heat regenerator 2 and the high-temperature heat supply network heater 14 to release heat and then join, then enter the low-temperature heat supply network heater 7; the return water temperature of the primary network is about 25 ℃, the working medium at the inlet of the main compressor 1 can be cooled to about 32 ℃, so that the carbon dioxide at the cold end of the power generation system is cooled by the low-temperature heating network heater 7 and then enters the main compressor 1 through a bypass pipeline where the bypass valve 11 of the precooler is located without flowing through the precooler 10; the high-temperature heating network heater regulating valve 13 regulates the flow of carbon dioxide of the high-temperature heating network heater 14 so as to regulate the thermoelectric ratio; the primary network backwater is heated after recycling cold end working medium heat through the low-temperature heat supply network heater 7 and the high-temperature heat supply network heater 14 in sequence, and then enters the generator 21 and the evaporator 17 to release heat so as to drive the heat pump to operate; the secondary net backwater heats up in the absorber 19 and the condenser 15 in sequence, and then supplies heat to a heat user;
in a non-heating period, the heating system stops running, the high-temperature heat supply network heater regulating valve 13, the low-temperature heat supply network heater regulating valve 6 and the precooler bypass valve 11 are closed, the low-temperature heat supply network heater bypass valve 8 and the precooler regulating valve 9 are opened, all working media at the outlet of the hot side of the high-temperature heat regenerator 3 in the supercritical carbon dioxide power generation system enter the low-temperature heat regenerator 2 to release heat, flow through a pipeline where the low-temperature heater bypass valve 8 and the precooler regulating valve 9 are located, and enter the main compressor 1 after being cooled by the precooler 1; the other operation processes of the supercritical carbon dioxide power generation system are the same as the heating period.
The invention has the beneficial effects that:
1. the invention can realize thermoelectric complete decoupling, and greatly improves the operation flexibility of the system.
2. According to the invention, the temperature of the return water of the primary network can be reduced to about 25 ℃ by adopting the absorption heat pump between the primary network and the secondary network, so that the heat supply capacity of the system is greatly improved.
3. The invention can completely recover the waste heat of the cold end of the system in the heating period, realizes the graded utilization of energy according to the quality and greatly improves the energy utilization efficiency.
Drawings
Fig. 1 is a schematic diagram of a supercritical carbon dioxide cycle cogeneration system of an integrated absorption heat pump according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, a supercritical carbon dioxide cycle cogeneration system of an integrated absorption heat pump is characterized in that: comprises a supercritical carbon dioxide power generation system and a heat supply system;
wherein, the outlet of a main compressor 1, the inlet and outlet of a cold side of a low-temperature heat regenerator 2, the inlet and outlet of a cold side of a high-temperature heat regenerator 3, the inlet and outlet of a boiler 4, the inlet and outlet of a turbine 5, the inlet and outlet of a hot side of the high-temperature heat regenerator 3, the inlet and outlet of a hot side of the low-temperature heat regenerator 2, the inlet and outlet of a low-temperature heat network heater bypass valve 8, the inlet and outlet of a precooler regulating valve 9, the inlet and outlet; the inlet and outlet of the recompressor 12 are respectively communicated with the hot side outlet of the low-temperature heat regenerator 2 and the cold side outlet of the low-temperature heat regenerator 2; the outlet of the low-temperature heating network heater bypass valve 8 is communicated with the outlet of the precooler 10 through a precooler bypass valve 11;
the heat supply system comprises a low-temperature heat supply network heater 7, a high-temperature heat supply network heater 14 and an absorption heat pump formed by sequentially communicating a condenser 15, a throttle valve 16, an evaporator 17, an absorber 19 and a generator 21; the outlet of the hot side of the high-temperature heat regenerator 3, the inlet and outlet of the high-temperature heat supply network heater regulating valve 13, the inlet and outlet of the hot side of the high-temperature heat supply network heater 14, the inlet and outlet of the low-temperature heat supply network heater regulating valve 6, the inlet and outlet of the hot side of the low-temperature heat supply network heater 7, the inlet and outlet of the precooler regulating valve 9 and the inlet of the; the inlet of the low-temperature heating network heater regulating valve 6 is communicated with the hot side outlet of the low-temperature heating network heater 7 through a low-temperature heating network heater bypass valve 8; the lower outlet of the evaporator 17 is communicated with the upper inlet of the generator 17 through a working medium pump 18; an outlet at the lower end of the absorber 19 is communicated with an inlet at the upper end of the generator 21 through a solution pump 20 and the cold side of a solution heat exchanger 22 in sequence; the outlet at the lower end of the generator 21 is communicated with the inlet at the upper end of the absorber 19 through the hot side of the solution heat exchanger 22 and the solution valve 23 in sequence; the generator 21, the evaporator 17, the low-temperature heating network heater 7 and the high-temperature heating network heater 14 are communicated in sequence along the circulation direction of primary network circulating water to form a primary network heat exchange system; the absorber 19 and the condenser 15 are communicated in sequence along the circulation direction of the secondary network circulating water to form a secondary network heating system.
As a preferred embodiment of the invention, said first auxiliary precooler 12 and second auxiliary precooler 18 are arranged in parallel in a position before the precooler 13.
In a preferred embodiment of the present invention, the temperature of the carbon dioxide in the high temperature heating network heater 14 is high, so that the primary network circulating water can be heated to about 130 ℃.
In a preferred embodiment of the present invention, the high-temperature heat supply network heater control valve 13 controls the flow rate of carbon dioxide in the primary heat exchange system, thereby controlling the heat load.
As a preferred embodiment of the invention, the heat exchange between the primary network circulating water and the secondary network circulating water is realized through an absorption heat pump, and the primary network backwater is about 25 ℃.
As shown in fig. 1, in a heating period, a high-temperature heat supply network heater regulating valve 13, a low-temperature heat supply network heater regulating valve 6 and a precooler bypass valve 11 are opened, a low-temperature heat supply network heater bypass valve 8 and a precooler regulating valve 1 are closed, a supercritical carbon dioxide working medium is boosted by a main compressor 1, then the supercritical carbon dioxide working medium is absorbed in a low-temperature heat regenerator 2, a high-temperature heat regenerator 3 and a boiler 4 in sequence and then enters a turbine 5 to do work, exhaust gas of the turbine 5 is divided into two parts after releasing heat in the high-temperature heat regenerator 3, enters the low-temperature heat regenerator 2 and the high-temperature heat supply network heater 14 respectively to release heat and then join, then enters the low-temperature heat supply network heater 7 to be cooled, and enters the main compressor 1 again to form a closed power generation circulation; the return water temperature of the primary network is about 25 ℃, the working medium at the inlet of the main compressor 1 can be cooled to about 32 ℃, so that the carbon dioxide at the cold end of the power generation system is cooled by the low-temperature heating network heater 7 and then enters the main compressor 1 through a bypass pipeline where the bypass valve 11 of the precooler is located without flowing through the precooler 10; the high-temperature heating network heater regulating valve 13 regulates the flow of carbon dioxide of the high-temperature heating network heater 14 so as to regulate the thermoelectric ratio; the primary network backwater is heated after recycling cold end working medium heat through the low-temperature heat supply network heater 7 and the high-temperature heat supply network heater 14 in sequence, and then enters the generator 21 and the evaporator 17 to release heat so as to drive the heat pump to operate; the secondary net backwater heats up in the absorber 19 and the condenser 15 in sequence, and then supplies heat to a heat user;
in a non-heating period, the heating system stops running, the high-temperature heat supply network heater regulating valve 13, the low-temperature heat supply network heater regulating valve 6 and the precooler bypass valve 11 are closed, the low-temperature heat supply network heater bypass valve 8 and the precooler regulating valve 9 are opened, all working media at the outlet of the hot side of the high-temperature heat regenerator 3 in the supercritical carbon dioxide power generation system enter the low-temperature heat regenerator 2 to release heat, flow through a pipeline where the low-temperature heater bypass valve 8 and the precooler regulating valve 9 are located, and enter the main compressor 1 after being cooled by the precooler 1; the other operation processes of the supercritical carbon dioxide power generation system are the same as the heating period.
Claims (5)
1. A supercritical carbon dioxide circulation cogeneration system of an integrated absorption heat pump is characterized by comprising a supercritical carbon dioxide power generation system and a heat supply system;
the supercritical carbon dioxide power generation system comprises a main compressor (1), wherein an outlet of the main compressor (1), a cold side inlet and outlet of a low-temperature heat regenerator (2), a cold side inlet and outlet of a high-temperature heat regenerator (3), an inlet and outlet of a boiler (4), an inlet and outlet of a turbine (5), a hot side inlet and outlet of the high-temperature heat regenerator (3), a hot side inlet and outlet of the low-temperature heat regenerator (2), an inlet and outlet of a low-temperature heat network heater bypass valve (8), an inlet and outlet of a precooler regulating valve (9), an inlet and outlet of a precooler (10) and an inlet of the main compressor; an inlet and an outlet of the recompressor (12) are respectively communicated with a hot side outlet of the low-temperature regenerator (2) and a cold side outlet of the low-temperature regenerator (2); the outlet of the low-temperature heating network heater bypass valve (8) is communicated with the outlet of the precooler (10) through a precooler bypass valve (11);
the heat supply system comprises a low-temperature heat supply network heater (7), a high-temperature heat supply network heater (14) and an absorption heat pump, wherein the absorption heat pump is composed of a condenser (15), a throttle valve (16), an evaporator (17), an absorber (19) and a generator (21) which are sequentially communicated;
the hot side outlet of the high-temperature heat regenerator (3), the inlet and outlet of the high-temperature heat supply network heater regulating valve (13), the inlet and outlet of the hot side of the high-temperature heat supply network heater (14), the inlet and outlet of the low-temperature heat supply network heater regulating valve (6), the inlet and outlet of the hot side of the low-temperature heat supply network heater (7), the inlet and outlet of the precooler regulating valve (9) and the inlet of the precooler (10) are communicated in sequence;
the inlet of the regulating valve (6) of the low-temperature heat supply network heater is communicated with the outlet of the hot side of the low-temperature heat supply network heater (7) through a bypass valve (8) of the low-temperature heat supply network heater; the lower outlet of the evaporator (17) is communicated with the upper inlet of the generator (17) through a working medium pump (18); an outlet at the lower end of the absorber (19) is communicated with an inlet at the upper end of the generator (21) sequentially through a solution pump (20) and the cold side of a solution heat exchanger (22); the outlet at the lower end of the generator (21) is communicated with the inlet at the upper end of the absorber (19) through the hot side of the solution heat exchanger (22) and the solution valve (23) in sequence.
2. The supercritical carbon dioxide cycle cogeneration system of an integrated absorption heat pump according to claim 1, wherein the generator (21), the evaporator (17), the low temperature heat supply network heater (7) and the high temperature heat supply network heater (14) are sequentially communicated along a circulation water flow direction of a primary network to form a primary network heat exchange system; the absorber (19) and the condenser (15) are communicated in sequence along the circulation direction of the circulating water of the secondary network to form a heating system of the secondary network.
3. The supercritical carbon dioxide cycle cogeneration system of an integrated absorption heat pump of claim 2, wherein the heat exchange between the primary network circulating water and the secondary network circulating water is realized by the absorption heat pump, and the primary network backwater is about 25 ℃.
4. The supercritical carbon dioxide cycle cogeneration system of an integrated absorption heat pump according to claim 1, wherein the high temperature heat network heater regulating valve (13) regulates the heat load by regulating the flow of carbon dioxide in the primary network heat exchange system.
5. A method of a supercritical carbon dioxide circulation combined heat and power generation system of an integrated absorption heat pump, it is characterized in that in the heating period, a high-temperature heating network heater regulating valve (13), a low-temperature heating network heater regulating valve (6) and a precooler bypass valve (11) are opened, a low-temperature heating network heater bypass valve (8) and a precooler regulating valve (1) are closed, a supercritical carbon dioxide working medium is boosted by a main compressor (1), then the heat is absorbed in the low-temperature heat regenerator (2), the high-temperature heat regenerator (3) and the boiler (4) in sequence and then enters the turbine (5) to do work, the exhaust gas of the turbine (5) is divided into two parts after being released in the high-temperature heat regenerator (3), and the two parts respectively enter the low-temperature heat regenerator (2) and the high-temperature heat supply network heater (14) to be converged after being released, then the mixture enters a low-temperature heating network heater (7) to be cooled and enters a main compressor (1) again to form a closed power generation circulating system; the return water temperature of the primary network is about 25 ℃, working media at the inlet of the main compressor (1) can be cooled to about 32 ℃, so that carbon dioxide at the cold end of the power generation system enters the main compressor (1) through a bypass pipeline where a bypass valve (11) of the precooler is located after being cooled by the low-temperature heating network heater (7) and does not flow through the precooler (10); the high-temperature heating network heater regulating valve (13) regulates the flow of carbon dioxide of the high-temperature heating network heater (14) so as to regulate the thermoelectric ratio; the primary network backwater is heated after being sequentially passed through the low-temperature heat supply network heater (7) and the high-temperature heat supply network heater (14) to recover the heat of the working medium at the cold end, and then enters the generator (21) and the evaporator (17) to release heat so as to drive the heat pump to operate; the secondary net backwater heats up in the absorber (19) and the condenser (15) in sequence, and then supplies heat to a heat user;
in a non-heating period, the heating system stops running, the high-temperature heating network heater regulating valve (13), the low-temperature heating network heater regulating valve (6) and the precooler bypass valve (11) are closed, the low-temperature heating network heater bypass valve (8) and the precooler regulating valve (9) are opened, working media at the hot side outlet of the high-temperature heat regenerator (3) in the supercritical carbon dioxide power generation system all enter the low-temperature heat regenerator (2) to release heat, flow through a pipeline where the low-temperature heater bypass valve (8) and the precooler regulating valve (9) are located, and enter the main compressor (1) after being cooled by the precooler (1); the other operation processes of the supercritical carbon dioxide power generation system are the same as the heating period.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554982A (en) * | 2020-11-25 | 2021-03-26 | 西安交通大学 | Supercritical carbon dioxide cogeneration system and operation method |
| CN114718680A (en) * | 2022-04-06 | 2022-07-08 | 西安热工研究院有限公司 | Supercritical CO integrated with multistage compression heat pump2Cogeneration system and method |
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| CN110056851A (en) * | 2019-04-25 | 2019-07-26 | 上海锅炉厂有限公司 | A kind of supercritical carbon dioxide boiler working substance humidity control system and method |
| CN211781359U (en) * | 2020-03-11 | 2020-10-27 | 西安热工研究院有限公司 | Supercritical carbon dioxide circulation combined heat and power generation system integrated with absorption heat pump |
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2020
- 2020-03-11 CN CN202010164745.7A patent/CN111322660B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110056851A (en) * | 2019-04-25 | 2019-07-26 | 上海锅炉厂有限公司 | A kind of supercritical carbon dioxide boiler working substance humidity control system and method |
| CN211781359U (en) * | 2020-03-11 | 2020-10-27 | 西安热工研究院有限公司 | Supercritical carbon dioxide circulation combined heat and power generation system integrated with absorption heat pump |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112554982A (en) * | 2020-11-25 | 2021-03-26 | 西安交通大学 | Supercritical carbon dioxide cogeneration system and operation method |
| CN112554982B (en) * | 2020-11-25 | 2022-04-05 | 西安交通大学 | Supercritical carbon dioxide cogeneration system and operation method |
| CN114718680A (en) * | 2022-04-06 | 2022-07-08 | 西安热工研究院有限公司 | Supercritical CO integrated with multistage compression heat pump2Cogeneration system and method |
| CN114718680B (en) * | 2022-04-06 | 2024-01-19 | 西安热工研究院有限公司 | Supercritical CO integrated with multistage compression heat pump 2 Cogeneration system and method |
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