CN112983585B - Heat pump solar steam turbine generator unit combined heat and power generation circulating system - Google Patents
Heat pump solar steam turbine generator unit combined heat and power generation circulating system Download PDFInfo
- Publication number
- CN112983585B CN112983585B CN202110251235.8A CN202110251235A CN112983585B CN 112983585 B CN112983585 B CN 112983585B CN 202110251235 A CN202110251235 A CN 202110251235A CN 112983585 B CN112983585 B CN 112983585B
- Authority
- CN
- China
- Prior art keywords
- temperature
- working medium
- carbon dioxide
- low
- steam turbine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000010248 power generation Methods 0.000 title description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 216
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 108
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 108
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 50
- 230000005855 radiation Effects 0.000 claims abstract description 25
- 230000008878 coupling Effects 0.000 claims abstract description 4
- 238000010168 coupling process Methods 0.000 claims abstract description 4
- 238000005859 coupling reaction Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000001704 evaporation Methods 0.000 claims description 9
- 230000008020 evaporation Effects 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 64
- 239000000498 cooling water Substances 0.000 description 3
- 238000004781 supercooling Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013526 supercooled liquid Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G6/00—Devices for producing mechanical power from solar energy
- F03G6/02—Devices for producing mechanical power from solar energy using a single state working fluid
- F03G6/04—Devices for producing mechanical power from solar energy using a single state working fluid gaseous
-
- 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
-
- 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
-
- 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
-
- 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
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/32—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines using steam of critical or overcritical pressure
-
- 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
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
-
- 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
-
- 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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a heat pump solar steam turbine generator unit cogeneration cycle system, which comprises a compressor, a high-pressure gas storage tank, a steam turbine, a water cooler, a heat exchanger, a throttling device and an evaporator, wherein the high-pressure gas storage tank is connected with the high-pressure gas storage tank; the system comprises a compressor, a high-pressure gas storage tank, a steam turbine, a water cooler, a heat exchanger high-temperature channel, a throttling device, an evaporator, a heat exchanger low-temperature channel and the compressor are sequentially communicated through pipelines to form a circulation loop, and carbon dioxide circulating working media flow through the circulation loop; a solar radiation plate is arranged around the high-pressure gas storage tank; the rotor of the steam turbine is connected with the rotor of the generator through a coupling. According to the invention, low-grade heat energy in an air source under a high environmental temperature condition is converted into supercritical high-temperature high-pressure carbon dioxide circulating working medium gas through a heat pump technology, sunlight focuses on radiation to heat the circulating working medium gas in the high-pressure air storage tank, and a turbo generator unit and a water cooler convert the heat energy in the supercritical carbon dioxide circulating working medium into electric energy and hot water to realize cogeneration.
Description
Technical Field
The invention relates to the technical field of carbon dioxide circulating working medium heat pump solar steam turbine generator units, in particular to a heat pump solar steam turbine generator unit cogeneration circulating system.
Background
The heat pump technology utilizes the reverse Carnot cycle to convert low-grade heat energy in an air source (a water source and a ground source) into high-temperature domestic hot water, heating and industrial hot water, and is widely applied to the field. For an air source heat pump, the higher the ambient temperature is, the higher the heating efficiency of the heat pump unit is, especially in summer high-temperature weather, a huge amount of low-grade heat energy is stored in the air, the heating efficiency of the heat pump unit is very high, in addition, solar radiation heat energy in summer is very strong, the demands of people on domestic hot water and industrial hot water in summer are greatly reduced, the on-duty rate of the heat pump unit is very low, and especially the heat pump heating unit in the north is completely stopped running in high-temperature weather. In a traditional heat energy power plant, high-temperature and high-pressure steam generated by a coal (gas) -fired heating boiler is used for driving an impeller of a steam turbine and a rotor to rotate to drive a rotor of a generator to rotate for generating electricity, and the steam discharged by the steam turbine is condensed by a water cooler and then is conveyed to the boiler through a high-pressure pump to be heated into the high-temperature and high-pressure steam to drive the steam turbine.
There are also many heat pump power generation patent technologies in China, for example, the invention patent with application number CN201710323183.4, which uses dynamic pressure (steam pressure) generated by vaporization and expansion of low boiling point liquid in an evaporator of a heat pump unit to drive a generator to operate through a pneumatic motor or a steam turbine to realize heat pump power generation. The patent technology with application number CN201820942167.3 utilizes a heat pump to heat hot water to generate steam for power generation and Stirling thermoelectric power generation. As is well known, the most mature technology for generating electricity by steam is to drive an impeller and a rotor to rotate through a through-flow part of a steam turbine so as to drive a generator rotor to rotate for generating electricity.
The invention provides a method for utilizing the higher heating energy efficiency of an air source heat pump unit under the condition of high ambient temperature and the radiation heat energy of the sun.
Disclosure of Invention
The invention aims to provide a heat pump solar steam turbine generator unit cogeneration cycle system, which adopts a carbon dioxide cycle working medium to absorb low-grade heat energy in air from an air source through low-temperature evaporation of an evaporator in an air source heat pump, forms high-temperature and high-pressure supercritical carbon dioxide gas through compression of a compressor, further heats the high-temperature and high-pressure supercritical carbon dioxide gas through sunlight focusing radiation heat energy, inputs the high-temperature and high-pressure carbon dioxide gas in a gas storage tank to a high-pressure inlet of a steam turbine, drives an impeller and a rotor of the steam turbine to rotate to drive a generator to generate electricity, and produces hot water through heat exchange of the low-temperature and low-pressure cycle working medium gas discharged from the steam turbine through a water cooler.
The purpose of the invention is realized by the following technical scheme:
a heat pump solar steam turbine generator unit cogeneration circulating system comprises a compressor, a high-pressure gas storage tank, a steam turbine, a water cooler, a heat exchanger, a throttling device and an evaporator, wherein the heat exchanger comprises a high-temperature channel and a low-temperature channel; the system comprises a compressor, a high-pressure gas storage tank, a steam turbine, a water cooler, a high-temperature channel of a heat exchanger, a throttling device, an evaporator, a low-temperature channel of the heat exchanger and the compressor are sequentially communicated through pipelines to form a circulation loop, and carbon dioxide circulation working media flow through the circulation loop; a solar radiation plate is arranged around the high-pressure gas storage tank; the rotor of the steam turbine is connected with the rotor of the generator through a coupling.
Furthermore, a fan is arranged on the evaporator to maintain the heat exchange between the evaporator and air in a convection manner.
Further, the steam turbine comprises an impeller and a rotor, and high-temperature high-pressure supercritical carbon dioxide circulating working medium gas in the high-pressure gas storage tank enters the through-flow part through a high-pressure inlet of the steam turbine to drive the impeller and the rotor to rotate; the turbine rotor drives the generator rotor to rotate to generate power.
Further, the working method of the air source heat pump, the solar energy and the cogeneration cycle system of the steam turbine generator unit comprises the following steps:
s1, operating a compressor, sucking carbon dioxide circulating working medium gas from a low-temperature channel into the compressor through a gas return pipe, and compressing the carbon dioxide circulating working medium gas into high-temperature high-pressure supercritical carbon dioxide gas;
s2, outputting the high-temperature high-pressure supercritical carbon dioxide gas into a high-pressure gas storage tank through an exhaust pipe of the compressor, and focusing solar radiation heat energy onto the high-pressure gas storage tank by using a solar radiation plate to heat the carbon dioxide circulating working medium gas;
s3, allowing the high-temperature high-pressure supercritical carbon dioxide circulating working medium gas to enter a circulating part of the steam turbine to drive a steam turbine impeller and a rotor to rotate, and driving a generator rotor to rotate to generate power;
s4, outputting the carbon dioxide circulating working medium gas subjected to temperature and pressure reduction through the through-flow part of the steam turbine to an internal pipeline of a water cooler through an exhaust port of the steam turbine for cooling, and adjusting the heating efficiency of the circulating system by adjusting the water inlet temperature of the water cooler;
s5, inputting the cooled carbon dioxide circulating working medium into a high-temperature channel of the heat exchanger, and performing heat exchange with low-temperature carbon dioxide circulating working medium gas input from a low-temperature channel of the heat exchanger;
s6, the carbon dioxide circulating working medium in the high-temperature channel releases heat and is cooled to form a liquid circulating working medium, the liquid circulating working medium is depressurized by a throttling device and enters an evaporator, and low-temperature evaporation is carried out after low-grade heat energy from an air source is absorbed by a pipeline;
and S7, the carbon dioxide circulating working medium gas after low-temperature evaporation in the evaporator pipeline enters a low-temperature channel of the heat exchanger, is subjected to heat exchange and is sucked into the compressor through the air return pipe for compression.
The evaporator of the carbon dioxide circulating working medium heat pump system absorbs low-grade heat energy from an air source, the compressor compresses and applies work to form high-temperature and high-pressure supercritical carbon dioxide gaseous circulating working medium, the critical point temperature of the carbon dioxide circulating working medium is 31.1 ℃, the exhaust temperature of the supercritical carbon dioxide circulating working medium compressor can reach the range of 80-120 ℃, the exhaust pressure can reach the range of 8-13 Mpa, the supercritical high-temperature and high-pressure carbon dioxide circulating working medium gas exhausted by the compressor is input into a high-pressure gas storage tank, solar radiation heat energy is focused to the high-pressure gas storage tank through a solar energy concentrating radiation plate to further heat the carbon dioxide gas in the high-pressure gas storage tank, the high-temperature and high-pressure carbon dioxide gas in the high-pressure gas storage tank is input into a high-pressure inlet of a steam turbine, and an impeller and a rotor are driven to rotate through a through-flow part of the steam turbine to drive a generator rotor to rotate to generate electricity. The supercritical high-temperature high-pressure carbon dioxide circulating working medium gas is subjected to work by a steam turbine, partial heat energy of the supercritical high-temperature high-pressure carbon dioxide circulating working medium gas is converted into mechanical energy for rotating a steam turbine rotor to drive a generator rotor to rotate to generate electricity, the temperature and the pressure of the carbon dioxide circulating working medium discharged from an exhaust port of the steam turbine can be reduced to a lower range, the carbon dioxide circulating working medium gas is input into a water cooler to be cooled, the carbon dioxide circulating working medium cooled by the water cooler is input into a high-temperature channel of a heat exchanger to exchange heat with low-temperature carbon dioxide circulating working medium gas from an outlet of an evaporator in a low-temperature channel of the heat exchanger, the exhaust temperature of the evaporator is far lower than the critical temperature (31.1 ℃) of carbon dioxide, the carbon dioxide circulating working medium in the high-temperature channel can further release heat to be cooled to be lower than the critical temperature of the carbon dioxide to form liquid carbon dioxide (or supercooled carbon dioxide liquid) circulating working medium, the liquid carbon dioxide circulating working medium is reduced in the pressure by a throttling device and then enters a pipeline in the evaporator to absorb low-grade heat energy in an air source for low-temperature evaporation, and the evaporator carries out convective heat exchange with air through a fan; the low-temperature carbon dioxide circulating working medium gas from the exhaust pipe of the evaporator absorbs the heat released by the carbon dioxide circulating working medium in the high-temperature channel in the low-temperature channel of the heat exchanger to be heated, then enters the return air port of the compressor, the energy efficiency of the compressor is improved after the return air temperature of the compressor is raised, and the cogeneration cycle of the carbon dioxide circulating working medium air source heat pump solar turbo generator unit can be realized through the cycle.
The beneficial technical effects are as follows:
the invention absorbs and converts low-grade heat energy in an air source into supercritical high-temperature high-pressure carbon dioxide circulating working medium gas through a heat pump technology, further heats the circulating working medium gas through sunlight focusing radiation heat energy, converts the heat energy in the supercritical carbon dioxide circulating working medium into electric energy and hot water through a turbo generator set and a water cooler thereof to realize cogeneration, and provides a new way for generating power and producing hot water by using the low-grade heat energy and the solar radiation heat energy in the air source.
Drawings
FIG. 1 is a structural block diagram of a combined heat and power generation circulation system of an air source heat pump, solar energy and a steam turbine generator unit.
FIG. 2 is a flow chart of the air source heat pump, solar energy, and turbo-generator set cogeneration cycle system of the present invention.
In the figure: the method comprises the following steps of 1-a compressor, 2-a steam turbine, 3-a generator, 4-a water cooler, 5-a throttling device, 6-an evaporator, 7-a fan, 8-a heat exchanger, 9-a high-temperature channel, 10-a low-temperature channel, 11-a high-pressure air storage tank and 12-a solar radiation plate.
Detailed Description
Referring to fig. 1, the air source heat pump, solar energy and steam turbine generator unit cogeneration cycle system comprises a compressor 1, a high pressure gas storage tank 11, a steam turbine 2, a water cooler 4, a heat exchanger 8, a throttling device 5 and an evaporator 6, wherein the heat exchanger 8 comprises a high temperature channel 9 and a low temperature channel 10; the system comprises a compressor 1, a high-pressure gas storage tank 11, a steam turbine 2, a water cooler 4, a high-temperature channel 9 of a heat exchanger 8, a throttling device 5, an evaporator 6, a low-temperature channel 10 of the heat exchanger 8 and the compressor 1 which are sequentially communicated through pipelines to form a circulation loop, wherein carbon dioxide circulation working media flow through the circulation loop; a solar radiation plate 12 is arranged around the high-pressure gas storage tank 11; the rotor of the steam turbine 2 is connected with the rotor of the generator 3 through a coupling; the evaporator 6 is provided with a fan 7.
Specifically, a low-temperature channel 10 in the heat exchanger 8 is connected with a compressor 1 through an air return pipe, the compressor 1 is communicated with a high-pressure gas storage tank 11 through an exhaust pipe, solar radiation plates 12 focus solar radiation heat energy into the high-pressure gas storage tank 11 to heat carbon dioxide circulating working medium gas in the high-pressure gas storage tank 11, an outlet of the high-pressure gas storage tank 11 is connected to a high-pressure inlet of a turbine 2, high-temperature high-pressure supercritical carbon dioxide circulating working medium gas enters a through-flow part through the high-pressure inlet of the turbine 2 to drive an impeller and a rotor of the turbine 2 to rotate, the rotor of the turbine drives a rotor of a generator 3 to rotate to generate power, and an exhaust port of the turbine 2 is connected with a water cooler 4.
Referring to fig. 2, the working method of the air source heat pump, solar energy and steam turbine generator unit cogeneration cycle system comprises the following steps:
s1, operating a compressor, sucking carbon dioxide circulating working medium gas from a low-temperature channel into the compressor through a gas return pipe, and compressing the carbon dioxide circulating working medium gas into high-temperature high-pressure supercritical carbon dioxide gas.
And S2, outputting the high-temperature high-pressure supercritical carbon dioxide gas into a high-pressure gas storage tank through an exhaust pipe of the compressor, and focusing solar radiation heat energy onto the high-pressure gas storage tank by using a solar radiation plate to heat the carbon dioxide cycle working medium gas.
S3, allowing the high-temperature high-pressure supercritical carbon dioxide circulating working medium gas to enter a circulating part of the steam turbine to drive a steam turbine impeller and a rotor to rotate, and driving a generator rotor to rotate to generate power; the steam turbine 2 converts part of heat energy in the high-temperature high-pressure supercritical carbon dioxide cycle working medium gas into mechanical energy for rotating the rotor of the steam turbine 2, and the rotor of the steam turbine 2 drives the rotor of the generator 3 to rotate for generating power.
S4, outputting the carbon dioxide circulating working medium gas subjected to temperature and pressure reduction through the through-flow part of the steam turbine to an internal pipeline of a water cooler through an exhaust port of the steam turbine for cooling, and adjusting the heating efficiency of the circulating system by adjusting the water inlet temperature of the water cooler; the cooling water absorbs the waste heat of the carbon dioxide circulating working medium to form hot water which is discharged out of the water cooler, the temperature of the carbon dioxide circulating working medium is further reduced after passing through the water cooler 4, and the carbon dioxide circulating working medium is cooled by the water cooler and then keeps in a gaseous state under the condition of high environmental temperature when the temperature of the cooling water is higher than the temperature of the carbon dioxide critical point because the temperature of the carbon dioxide critical point is 31.1 ℃.
S5, inputting the cooled carbon dioxide circulating working medium into a high-temperature channel of the heat exchanger, and performing heat exchange with the low-temperature carbon dioxide circulating working medium gas input from a low-temperature channel of the heat exchanger; the temperature of the low-temperature carbon dioxide working medium gas in the low-temperature channel 10 in the heat exchanger 8 is increased after absorbing the waste heat released by the carbon dioxide circulating working medium in the high-temperature channel 9, and the carbon dioxide circulating working medium gas after being heated in the low-temperature channel 10 enters the compressor 1 through the air return pipe of the compressor 1.
S6, the carbon dioxide circulating working medium in the high-temperature channel releases heat and is cooled to form liquid circulating working medium (or supercooling circulating working medium), the liquid circulating working medium is depressurized by a throttling device and enters an evaporator, and low-temperature evaporation is carried out after low-grade heat energy from an air source is absorbed by a pipeline; the evaporator 6 absorbs low-grade heat energy in an air source through the convection heat exchange of the fan 7 and air, and the carbon dioxide circulating working medium continuously circulates in the pipeline.
And S7, the carbon dioxide circulating working medium gas after low-temperature evaporation in the evaporator pipeline enters a low-temperature channel of the heat exchanger, is subjected to heat exchange and is sucked into the compressor through the air return pipe for compression. The heat exchange of the carbon dioxide circulating working medium of the high-temperature channel 9 and the low-temperature channel 10 in the heat exchanger 8 belongs to the heat exchange in the system, on one hand, the temperature of the low-temperature carbon dioxide circulating working medium in the low-temperature channel 10, namely the return air temperature of the compressor 1, can be improved, the energy efficiency of the compressor 1 can be further improved, on the other hand, the temperature (or supercooling degree) of the carbon dioxide circulating working medium in the high-temperature channel 9 can be reduced, and further, the capacity of the evaporator 6 for absorbing low-grade heat energy can be improved. Under the condition of high environmental temperature, when the water inlet temperature of the water cooler 4 is 31.1 ℃ higher than the critical point temperature of carbon dioxide, the carbon dioxide circulating working medium is in a gaseous state after passing through the water cooler 4, the gaseous carbon dioxide circulating working medium enters the high-temperature channel 9 and exchanges heat with the low-temperature carbon dioxide circulating working medium in the low-temperature channel 10, the carbon dioxide circulating working medium in the high-temperature channel 9 is changed from the gaseous state into the liquid state after the temperature of the carbon dioxide circulating working medium in the high-temperature channel 9 is reduced after heat exchange, latent heat released by phase change is absorbed by the low-temperature carbon dioxide circulating working medium in the low-temperature channel 10, the return air temperature of the compressor 1 is increased, and the efficiency of the compressor is improved. When the water inlet temperature of the water cooler 4 is low (lower than the critical point temperature of carbon dioxide by 31.1 ℃), the carbon dioxide circulating working medium is possibly cooled into liquid carbon dioxide in the water cooler, latent heat released by phase change of the gaseous carbon dioxide circulating working medium is absorbed by cooling water, the carbon dioxide liquid working medium is further cooled after entering the high-temperature channel 9 of the heat exchanger 8 to form carbon dioxide super-cooled liquid circulating working medium, the super-cooled carbon dioxide liquid circulating working medium is depressurized by the throttling device 5 and enters the inner pipeline of the evaporator 6 for low-temperature evaporation, more low-grade heat energy can be absorbed, and the heating efficiency of the system is improved. In addition, the solar energy condensing radiation plate is used for focusing solar radiation heat energy to the high-pressure gas storage tank to further heat the carbon dioxide gas in the high-pressure gas storage tank, so that the solar radiation heat energy can be better utilized; the invention can more flexibly adjust the heating efficiency of the circulating system by setting the water inlet temperature of the water cooler.
Claims (2)
1. A heat pump solar steam turbine generator unit cogeneration circulating system is characterized by comprising a compressor (1), a high-pressure gas storage tank (11), a steam turbine (2), a water cooler (4), a heat exchanger (8), a throttling device (5), an evaporator (6) and a fan (7), wherein the heat exchanger (8) comprises a high-temperature channel (9) and a low-temperature channel (10); the system comprises a compressor (1), a high-pressure gas storage tank (11), a steam turbine (2), a water cooler (4), a high-temperature channel (9) of a heat exchanger (8), a throttling device (5), an evaporator (6), a low-temperature channel (10) of the heat exchanger (8) and the compressor (1) which are sequentially communicated through pipelines to form a circulation loop, wherein a carbon dioxide circulation working medium flows through the circulation loop; a solar radiation plate (12) is arranged around the high-pressure gas storage tank (11); the rotor of the steam turbine (2) is connected with the rotor of the generator (3) through a coupling;
the air suction port of the compressor (1) sucks low-temperature and low-pressure carbon dioxide circulating working medium gas from a low-temperature channel (10) of an evaporator (6) and a heat exchanger (8) connected with the evaporator to form high-temperature and high-pressure supercritical carbon dioxide working medium gas, the high-temperature and low-pressure supercritical carbon dioxide circulating working medium gas is input into a high-pressure gas storage tank (11), sunlight is focused by a solar radiation plate (12) to heat the high-pressure gas storage tank (11) to further raise the temperature and the pressure of the carbon dioxide circulating working medium in the high-pressure gas storage tank (11), the supercritical carbon dioxide circulating working medium gas in the high-pressure gas storage tank (11) is input into a high-pressure inlet of a steam turbine (2) to drive an impeller and a rotor of the steam turbine (2) to rotate, the rotor of the steam turbine (2) drives a rotor of a generator (3) to rotate to generate electricity, the carbon dioxide circulating working medium applies work to the impeller and the rotor of the steam turbine (2), the carbon dioxide circulating working medium is discharged out of the steam turbine (2) to enter an internal pipeline of a water cooler (4) to produce hot water, the hot water is evaporated by cooling the low-temperature circulating working medium gas, the low-temperature circulating working medium (6) enters a low-temperature circulating pipeline to evaporate low-temperature circulating pipeline (6) and low-temperature circulating working medium (6) and low-temperature circulating pipeline to realize low-temperature throttling circulation device, the fan (7) maintains the air to pass through the evaporator (6) to realize the heat exchange between the low-grade heat energy in the air and the evaporator (6), and the liquid carbon dioxide working medium in the evaporator (6) absorbs the low-grade heat energy in the air and then enters the low-temperature channel (10) of the heat exchanger to realize the heat exchange with the high-pressure carbon dioxide working medium in the high-temperature channel (9) and then enters the air suction port of the compressor (1) to form circulation.
2. The circulation system of claim 1, wherein the method of operation comprises the steps of: s1, operating a compressor, sucking carbon dioxide circulating working medium gas from a low-temperature channel into the compressor through a gas return pipe, and compressing the carbon dioxide circulating working medium gas into high-temperature high-pressure supercritical carbon dioxide gas;
s2, outputting the high-temperature high-pressure supercritical carbon dioxide gas into a high-pressure gas storage tank through an exhaust pipe of the compressor, and focusing solar radiation heat energy onto the high-pressure gas storage tank by using a solar radiation plate to heat the carbon dioxide cycle working medium gas;
s3, allowing the high-temperature high-pressure supercritical carbon dioxide circulating working medium gas to enter a circulating part of the steam turbine to drive a steam turbine impeller and a rotor to rotate, and driving a generator rotor to rotate to generate power;
s4, outputting the carbon dioxide circulating working medium gas subjected to temperature and pressure reduction through the through-flow part of the steam turbine to an internal pipeline of a water cooler through an exhaust port of the steam turbine for cooling, and adjusting the heating efficiency of the circulating system by adjusting the water inlet temperature of the water cooler;
s5, inputting the cooled carbon dioxide circulating working medium into a high-temperature channel of the heat exchanger, and performing heat exchange with low-temperature carbon dioxide circulating working medium gas input from a low-temperature channel of the heat exchanger;
s6, the carbon dioxide circulating working medium in the high-temperature channel releases heat to be cooled to form a liquid circulating working medium, the liquid circulating working medium is depressurized by a throttling device and enters the evaporator, low-temperature evaporation is carried out after low-grade heat energy from an air source is absorbed by an evaporator pipeline, and a fan maintains air to flow through the evaporator to realize heat exchange between the air and the evaporator;
and S7, the carbon dioxide circulating working medium gas after low-temperature evaporation in the evaporator pipeline enters a low-temperature channel of the heat exchanger, is subjected to heat exchange and is sucked into the compressor through the air return pipe for compression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110251235.8A CN112983585B (en) | 2021-03-08 | 2021-03-08 | Heat pump solar steam turbine generator unit combined heat and power generation circulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110251235.8A CN112983585B (en) | 2021-03-08 | 2021-03-08 | Heat pump solar steam turbine generator unit combined heat and power generation circulating system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112983585A CN112983585A (en) | 2021-06-18 |
| CN112983585B true CN112983585B (en) | 2023-01-24 |
Family
ID=76335842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110251235.8A Active CN112983585B (en) | 2021-03-08 | 2021-03-08 | Heat pump solar steam turbine generator unit combined heat and power generation circulating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112983585B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114251874B (en) * | 2021-12-29 | 2023-10-27 | 北京华源泰盟节能设备有限公司 | Compact waste heat utilization system and waste heat utilization method thereof |
| CN116044693B (en) * | 2022-12-20 | 2024-02-23 | 郑州大学 | Method for utilizing biochemical conversion heat energy of exhausted oil and gas reservoir carbon dioxide |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012112369A (en) * | 2010-11-19 | 2012-06-14 | Atsuo Morikawa | Heat pump power generator |
| CN206539381U (en) * | 2017-02-10 | 2017-10-03 | 上海发电设备成套设计研究院 | A kind of supercritical carbon dioxide cycle generating system based on combustion gas and solar heat |
| CN106988972B (en) * | 2017-04-18 | 2018-10-12 | 长沙紫宸科技开发有限公司 | It is adapted to the method that rural area is generated electricity using solar energy as the carbon dioxide recycle of the energy |
| CN106884690B (en) * | 2017-04-18 | 2019-01-25 | 长沙紫宸科技开发有限公司 | The method for being adapted to the power generation of rural carbon dioxide recycle |
-
2021
- 2021-03-08 CN CN202110251235.8A patent/CN112983585B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112983585A (en) | 2021-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110374838B (en) | Transcritical carbon dioxide energy storage system and method based on LNG (liquefied Natural gas) cold energy utilization | |
| JP3230516U (en) | Supercritical carbon dioxide Brayton cycle power generation system for waste heat recovery | |
| CN101216020B (en) | Multilevel solar energy middle and low temperature Rankine cycle system | |
| WO2022166391A1 (en) | Co2 gas-liquid phase transition-based multistage compression energy storage apparatus for converting thermal energy into mechanical energy | |
| CN112983585B (en) | Heat pump solar steam turbine generator unit combined heat and power generation circulating system | |
| AU2010278676A1 (en) | Thermal power plants | |
| CN108397936B (en) | A kind of Combined cold-heat-power supplying circulation system and method | |
| CN109026243A (en) | Energy conversion system | |
| CN112780375A (en) | Compressed air energy storage system coupled with thermal power plant and using method thereof | |
| CN113775494A (en) | Ocean thermoelectric generation cold seawater cascade utilization system | |
| CN110552750B (en) | Non-azeotropic organic Rankine-dual-injection combined cooling, heating and power system | |
| CN206539381U (en) | A kind of supercritical carbon dioxide cycle generating system based on combustion gas and solar heat | |
| CN212054842U (en) | Steam-driven air energy storage peak shaving system | |
| CN201943904U (en) | Thermal power generating system using solar-energy return-heating, reheating and inter-cooling gas turbine circulation | |
| Lu et al. | Study on a small scale solar powered organic rankine cycle utilizing scroll expander | |
| CN108506177B (en) | Solar cascade organic Rankine cycle power generation system based on gas-liquid two-phase heat collector | |
| CN103615293B (en) | Carbon dioxide heat pump and organic working medium combined power generation system | |
| CN116641769A (en) | Energy storage utilization system based on carbon dioxide working medium | |
| CN215486194U (en) | Compressed air energy storage system coupled with thermal power plant | |
| CN202579069U (en) | Superconducting room temperature (RT) organic Rankine cycle solar integration power generation system | |
| CN114033516A (en) | Liquid compressed air energy storage method and system for coupling high-back-pressure heat supply unit | |
| CN112459857A (en) | Double-pressure organic Rankine cycle power generation system | |
| TWI399512B (en) | A low-grade heat-utilizing device and approach for producing power and refrigeration | |
| CN219640022U (en) | Solar-assisted liquefied air energy storage system | |
| CN212508675U (en) | Organic Rankine cycle power generation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 510000 No. 125, CHUANGYOU Road, Xintang Town, Zengcheng, Guangzhou, Guangdong (in the core area of Zengcheng economic and Technological Development Zone) Patentee after: Guangdong Newente New Energy Technology Co.,Ltd. Country or region after: China Address before: No.125 CHUANGYOU Road, Xintang Town, Zengcheng, Guangzhou, Guangdong 511340 (in the core area of Zengcheng economic and Technological Development Zone) Patentee before: GUANGDONG NEW ENERGY TECHNOLOGY DEVELOPMENT Co.,Ltd. Country or region before: China |