CN117606150A - Cross-season heat storage and short-term electricity storage combined photovoltaic photo-thermal system and method - Google Patents
Cross-season heat storage and short-term electricity storage combined photovoltaic photo-thermal system and method Download PDFInfo
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- CN117606150A CN117606150A CN202311558972.8A CN202311558972A CN117606150A CN 117606150 A CN117606150 A CN 117606150A CN 202311558972 A CN202311558972 A CN 202311558972A CN 117606150 A CN117606150 A CN 117606150A
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- 238000005338 heat storage Methods 0.000 title claims abstract description 154
- 230000005611 electricity Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 206
- 230000002528 anti-freeze Effects 0.000 claims description 27
- 238000010248 power generation Methods 0.000 claims description 9
- 239000002028 Biomass Substances 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 5
- 238000005086 pumping Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- QMYDVDBERNLWKB-UHFFFAOYSA-N propane-1,2-diol;hydrate Chemical compound O.CC(O)CO QMYDVDBERNLWKB-UHFFFAOYSA-N 0.000 claims description 2
- 238000003303 reheating Methods 0.000 claims description 2
- 238000004146 energy storage Methods 0.000 claims 1
- 230000001932 seasonal effect Effects 0.000 abstract description 4
- 230000007613 environmental effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 16
- 238000000605 extraction Methods 0.000 description 14
- 238000009825 accumulation Methods 0.000 description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
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- 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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
-
- 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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/12—Blades; Blade-carrying rotors
-
- 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
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/16—Stators
- F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/30—Solar heat collectors using working fluids with means for exchanging heat between two or more working fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/50—Solar heat collectors using working fluids the working fluids being conveyed between plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/40—Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/30—Arrangements for storing heat collected by solar heat collectors storing heat in liquids
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/40—Thermal components
- H02S40/44—Means to utilise heat energy, e.g. hybrid systems producing warm water and electricity at the same time
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention belongs to the field of photovoltaic photo-thermal systems, and discloses a photovoltaic photo-thermal system and a method combining seasonal heat storage and short-term power storage. The solar energy central heating system starts to operate after the heating period begins, so that heating requirements of residents in winter are met, the problem of electricity and heat utilization in western remote areas can be solved, the problem of difficult utilization of residual photovoltaic electricity is also solved, the life quality of residents in remote areas is improved, and obvious social benefits and environmental benefits are achieved.
Description
Technical Field
The invention belongs to the field of photovoltaic photo-thermal systems, and particularly relates to a photovoltaic photo-thermal system and a photovoltaic photo-thermal method combining cross-season heat storage and short-term power storage.
Background
Solar energy is used as inexhaustible clean renewable energy, plays a vital role in energy conservation and carbon reduction, is mainly concentrated on photo-thermal and photovoltaics at present, solar heating systems are popular in areas with rich solar energy, and solar seasonal fluctuation is large in the areas, heat loads are difficult to match with solar energy supply, so that the problem can be solved by adopting a cross-season heat storage mode, a buried heat storage pool is often adopted for heat storage in the cross-season heat storage system, and the buried heat storage pool has the advantages of large heat storage capacity, small heat loss, stability and reliability, low initial investment, simplicity in system and the like, and is gradually widely applied to cross-season heat storage solar central heating projects.
Meanwhile, photovoltaic power generation is widely applied to relieving the problem of electricity shortage in areas with rich solar energy, however, due to the fact that the solar energy periodically fluctuates and the influence of weather conditions, the problem of fluctuation exists in the photovoltaic power generation, and therefore after the normal electricity utilization requirement of residents is met, the photovoltaic residual electricity can be stored for use at night and when the generated energy is insufficient.
The solar energy resource rich areas in China are mainly concentrated in the western remote areas, so that the heating problem can be solved by adopting a cross-season heat storage solar central heating system, the remote areas are also faced with the problem of power shortage, the problems of power resource shortage and difficult electricity utilization of residents can be solved by adopting photovoltaic power generation while solar energy heating is adopted, the problems of high electricity storage cost, difficult maintenance and the like of the conventional electricity storage device generally exist, the conventional electricity storage device is difficult to be suitable for the remote areas, and the reasonable storage of photovoltaic residual electricity in the remote areas is also a problem to be solved.
Disclosure of Invention
The invention aims to provide a photovoltaic photo-thermal system and a photovoltaic photo-thermal method combining cross-season heat storage and short-term electricity storage, which are used for solving the problem that the utilization of residual photovoltaic electricity is difficult on the basis of the heating requirements and the electricity consumption heat problems of residents in remote areas of the middle and west elevations in the prior art.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides a photovoltaic photo-thermal system combining seasonal heat storage and short-term electricity storage, which comprises a solar heat collector array, wherein the solar heat collector array is connected with a preheating pipeline, the preheating pipeline is connected with a first heat exchanger in parallel, the cold source side of the first heat exchanger is connected with a low-level heat storage pool, the low-level heat storage pool is connected with a hydroelectric generating set and a second heat exchanger heat source meter, the hydroelectric generating set is connected with a high-level heat storage pool and a power distribution station, the high-level heat storage pool is positioned above the hydroelectric generating set, the second heat exchanger heat source meter and the power distribution station are connected with a user side, and the power distribution station is connected with a photovoltaic array;
the low-level heat storage pool is internally provided with a heat storage port, a heat taking port, a heat storage end return pipe and a heat taking end return pipe, wherein the heat storage port, the heat source side of the first heat exchanger and the heat storage end return pipe form a heat storage circulation loop, and the heat taking port, the heat source measuring of the second heat exchanger and the heat taking end return pipe form a heat taking circulation loop.
The invention is further improved in that the solar collector array adopts a large-size flat plate collector structure.
The invention further improves that the heat collection circulation heat transfer working medium of the solar heat collector array adopts propylene glycol water solution as antifreeze fluid.
The invention is further improved in that a biomass boiler is arranged between the heat source measurement of the second heat exchanger and the user side.
The invention is further improved in that the first heat exchanger and the second heat exchanger are plate heat exchangers.
The invention is further improved in that the heat storage ports comprise a high-layer heat storage port, a middle-layer heat storage port and a low-layer heat storage port, wherein the high-layer heat storage port is arranged at a position close to the top of the water tank, the middle-layer heat storage port is arranged at the middle of the water tank, and the low-layer heat storage port is arranged at a position close to the bottom of the water tank.
The invention is further improved in that the heat-taking port comprises a high-layer heat-taking port, a middle-layer heat-taking port and a low-layer heat-taking port, wherein the high-layer heat-taking port is arranged at a position close to the top of the water tank, the middle-layer heat-taking port is arranged in the middle of the water tank, and the low-layer heat-taking port is arranged at a position close to the bottom of the water tank.
The invention is further improved in that the hydroelectric generating set comprises a water diversion pipe, an impeller, a generator and a draft tube, wherein the water diversion pipe and the draft tube are connected in parallel, the impeller is positioned between the water diversion pipe and the draft tube, and the impeller is connected with the generator.
The invention is further improved in that the first water level monitor is arranged on the low-level heat storage water tank, and the second water level monitor is arranged on the high-level heat storage water tank.
The invention provides a control method of a photovoltaic photo-thermal system combining cross-season heat storage and short-term power storage, which comprises the following steps:
when the temperature of the outlet end of the solar heat collector array is lower than the set temperature in a non-heat supply period, preheating the antifreeze, conveying the low-temperature antifreeze back to the solar heat collector array through a preheating pipeline after the antifreeze enters the solar heat collector array for heating, and circularly reciprocating until the temperature of the outlet end of the solar heat collector array reaches the set temperature, finishing preheating, when the temperature of the outlet end of the solar heat collector array is higher than the temperature of the cold source side of the first heat exchanger after the preheating is finished, conveying the antifreeze into the solar heat collector array for heating and then conveying the antifreeze to the heat source side of the first heat exchanger for heat exchange, conveying the antifreeze to the solar heat collector array for reheating after the heat exchange temperature is reduced, conveying low-temperature water in the low-temperature heat storage pool to the cold source side of the first heat exchanger for heat exchange and then conveying the antifreeze to a heat storage port, circularly reciprocating, and continuously increasing the temperature of the low-temperature heat storage pool;
in the heat supply period, when the water level of the low-level heat storage water tank is at the top of the water tank, selecting a heat-taking end opening at the top, the middle or the bottom according to resident demands to take heat, when the water level of the low-level heat storage water tank is below the top of the water tank, selecting the heat-taking end opening at the middle or the bottom to take heat, conveying hot water to the heat source side of the second heat exchanger to exchange heat, and conveying low-temperature water back to the low-level heat storage water tank to complete heat-taking circulation in a circulating way;
during the daytime, a part of water in the low-level heat storage water tank is extracted to the high-level heat storage water tank, the water level of the low-level heat storage water tank cannot be lower than the middle part of the water tank, when the water level is in the middle part of the water tank, water pumping is stopped, a heat taking port in the middle part is adopted to take heat, the other part of water in the low-level heat storage water tank is conveyed to a heat source side of a second heat exchanger to exchange heat, heat exchange and heating is carried out, when the temperature meets the heat consumption requirement of a user side, namely when the difference value between the temperature of a heat source side outlet of the second heat exchanger and the set temperature T(s) of the user side fluctuates within an allowable fluctuation range DeltaT, the heated hot water is directly conveyed to the user side, if the difference value between the temperature of the heat source side outlet of the second heat exchanger and the set temperature T(s) of the user side does not meet the fluctuation within the allowable fluctuation range DeltaT, the heat taking port in the top, the middle part or the bottom is selected to take heat, so that circulation is completed, when the temperature of the hot water output by the heat source side of the second heat exchanger cannot meet the heat consumption requirement of the user side, the hot water is heated for the daytime, and then conveyed to the user side, the heat is satisfied, the heat demand is satisfied, the resident heat consumption heat is converted into the power consumption demand is satisfied, and the resident power consumption station is conveyed through the photovoltaic power distribution station through the array, and the daytime, and the power distribution station is required by the resident power consumption;
at night, water in the high-order heat storage water tank is discharged to the hydroelectric generating set, alternating current output by the hydroelectric generating set passes through the distribution station and is transmitted to a user side, the night electricity demand of residents is met, after power generation is completed, water in the hydroelectric generating set is discharged to the low-order heat storage water tank, and when the water level of the high-order heat storage water tank is smaller than the lowest water storage level, the hydroelectric generating set is closed.
Compared with the prior art, the invention has the following beneficial effects:
the photovoltaic photo-thermal system realizes heat accumulation circulation and heat extraction circulation through the heat accumulation circulation loop and the heat extraction circulation loop which are formed by the low-level heat accumulation water tank, the first heat exchanger and the second heat exchanger, water in the high-level heat accumulation water tank is discharged to the hydroelectric generating set at night, and meanwhile, the water level drop is utilized to cooperate with the hydroelectric generating set for generating electricity, so that the night part electricity utilization requirement of a user side is met, the problem of electricity utilization and heat utilization of residents in remote areas in the west can be solved, and the living quality of residents is improved.
Furthermore, the solar collector array adopts a large-size flat plate collector structure, and has the characteristics of simplicity, reliable operation, proper cost, strong bearing capacity and large heat area.
Furthermore, the heat collection and circulation heat transfer working medium of the solar heat collector array adopts propylene glycol aqueous solution as antifreeze, and has the characteristics of no harm to people and small influence on environment.
Further, the biomass boiler is arranged between the heat source measurement of the second heat exchanger and the user side, so that the secondary heating can be carried out on hot water which cannot reach the set temperature of the user side, and the domestic heat requirement is met.
Furthermore, the first heat exchanger and the second heat exchanger adopt plate heat exchangers, and have the characteristics of high heat exchange efficiency, small heat loss, compact and light structure, small occupied area, wide application and long service life.
Further, a first water level monitor is arranged on the low-level heat storage water tank, a second water level monitor is arranged on the high-level heat storage water tank, and the water level in the heat storage water tank can be monitored through the water level monitor.
The control method of the invention is that the solar heat collection circulation system is operated in a non-heating period to preheat the antifreeze, after preheating is finished, the high-temperature antifreeze is sent to the first heat exchanger to exchange heat, and the low-temperature water in the low-level heat storage pool realizes heat storage circulation through the heat storage circulation loop; during the heat supply period, the high-temperature water in the low-level heat storage water tank is subjected to heat extraction circulation through the heat extraction circulation loop, and meanwhile, part of water in the low-level heat storage water tank in the daytime is extracted to the high-level heat storage water tank to be used for generating power by the night hydroelectric generating set, so that short-term power storage combination is realized, resources can be saved, the environment is protected, and the living quality of residents in western regions is improved.
Drawings
FIG. 1 is a schematic diagram of a system architecture of the present invention;
FIG. 2 is a schematic view of the structure of a heat storage port and a heat extraction port of the heat storage pool;
FIG. 3 is a diagram of a hydro-power generation system of the present invention;
fig. 4 is a system control flow chart of the present invention.
1, a solar collector array; 2. a heat collection circulation liquid supply pipe; 2-1, a first temperature sensor; 2-2, a first three-way valve; 2-3, a first ball valve; 2-4, preheating the pipeline; 3. a first heat exchanger; 4. a first circulating water pump; 5. a thermal storage port; 5-1, a high-rise heat storage port; 5-2, a middle layer heat storage port; 5-3, a low-layer heat storage port; 5-4, a second ball valve; 5-5, a third ball valve; 5-6, a fourth ball valve; 6. a heat extraction port; 6-1, a high-level heat taking port; 6-2, a middle layer hot end taking port; 6-3, a low-layer heat taking port; 6-4, a fifth ball valve; 6-5, a sixth ball valve; 6-6, a seventh ball valve; 7. a low-level heat storage pool; 8. a first water level monitor; 9. a heat storage end return pipe; 9-1, an eighth ball valve; 9-2, a second temperature sensor; 10. a second circulating water pump; 11. a liquid return pipe of the heat collecting end; 12. a ninth ball valve; 13. a third circulating water pump; 14. a second heat exchanger; 15. a heat supply end water supply pipe; 16. a third temperature sensor; 17. a tenth ball valve; 18. a biomass boiler; 18-1, a boiler water inlet pipe; 18-2, a boiler water outlet pipe; 19. a second three-way valve; 20. a user terminal; 21. a fourth circulating water pump; 22. a heating end return pipe; 23. an eleventh ball valve; 24. a hot-end return pipe; 25. a photovoltaic array; 26. an optical Fu Zhi flowline; 27. a controller; 28. a first ac cable; 29. an inverter; 30. a second ac cable; 31. a power distribution station; 32. a low water inlet; 33. a hydroelectric generating set; 33-1, a penstock; 33-2, impellers; 33-3, a generator; 33-4, draft tube; 34. a twelfth ball valve; 35. a water pump; 36. a water pipe; 37. a thirteenth ball valve; 38. a high-order heat storage pool; 38-1, a second water level monitor; 39. and a third ac cable.
Detailed Description
The present invention will be further described with reference to the drawings and examples, but it should not be construed that the scope of the above-described subject matter of the present invention is limited to the following examples. Various substitutions and alterations are made according to the ordinary skill and familiar means of the art without departing from the technical spirit of the invention, and all such substitutions and alterations are intended to be included in the scope of the invention.
Referring to fig. 1, 2 and 3, the photovoltaic and photo-thermal system combining seasonal heat storage and short-term electricity storage comprises a solar heat collection system, a heat storage system, an off-grid solar photovoltaic system and a pumped storage power generation system;
the solar heat collection system comprises a solar heat collector array 1, a preheating pipeline 2-4 and a first heat exchanger 3;
the heat storage system comprises a low-level heat storage water tank 7, a first heat exchanger 3 and a second heat exchanger 14;
an off-grid solar photovoltaic system comprising a photovoltaic array 25, a controller 27, an inverter 29 and a power distribution station 31;
the pumped storage power generation system comprises a high-level heat storage water tank 38, a low-level heat storage water tank 7 and a hydroelectric generating set 33;
the solar heat collector array 1 is connected with the cold source side of the first heat exchanger 3 through a heat collection circulation liquid supply pipe 2, the heat collection circulation liquid supply pipe 2 and a preheating pipeline 2-4 are connected through a first three-way valve 2-2, a first temperature sensor 2-1 is arranged on the heat collection circulation liquid supply pipe 2, a first ball valve 2-3 is arranged on the preheating pipeline 2-4, the preheating pipeline 2-4 and the first heat exchanger 3 are connected with the solar heat collector array 1 in parallel, the heat source side of the first heat exchanger 3 is connected with the solar heat collector array 1 through a heat collection end liquid return pipe 11, and a second circulating water pump 10 is arranged on the heat collection end liquid return pipe 11.
A first water level monitor 8 is arranged on the low-level heat storage water tank 7, the cold source side of the first heat exchanger 3 is connected with the low-level heat storage water tank 7 through a heat storage end water supply pipe 5, the heat source side of the first heat exchanger 3 is connected with the low-level heat storage water tank 7 through a heat storage end water return pipe 9, a first circulating water pump 4 is arranged on the heat storage end water supply pipe 5, an eighth ball valve 9-1 and a second temperature sensor 9-2 are arranged on the heat storage end water return pipe 9, the heat source side of the second heat exchanger 14 is connected with the low-level heat storage water tank 7 through a heat taking end water supply pipe 6, the cold source side of the second heat exchanger 14 is connected with the low-level heat storage water tank 7 through a heat supply end water return pipe 24, a ninth ball valve 12 and a third circulating water pump 13 are arranged on the heat taking end 6, the low-level heat storage pool 7 is provided with a heat storage port and a heat taking end opening, the heat storage port comprises a high-level heat storage port 5-1, a middle-level heat storage port 5-2 and a low-level heat storage port 5-3, the heat taking end opening comprises a high-level heat taking port 6-1, a middle-level heat taking end opening 6-2 and a low-level heat taking end opening 6-3, a fourth ball valve 5-6 is arranged on the high-level heat storage port 5-1, a third ball valve 5-5 is arranged on the middle-level heat storage port 5-2, a second ball valve 5-4 is arranged on the low-level heat storage port 5-3, a seventh ball valve 6-6 is arranged on the high-level heat taking port 6-1, a sixth ball valve 6-5 is arranged on the middle-level heat taking end opening 6-2, and a fifth ball valve 6-4 is arranged on the low-level heat taking end opening 6-3.
The high-level heat storage water tank 38 is connected with the hydroelectric generating set 33 through a water pipe 36, a twelfth ball valve 34 and a thirteenth ball valve 37 are arranged on the water pipe 36, a second water level detector 38-1 is arranged on the high-level heat storage water tank 38, the hydroelectric generating set 33 is connected with the power distribution station 31 through a third alternating current cable 39 and a first alternating current cable 28, the hydroelectric generating set is connected with the low-level heat storage water tank 7 through a low-level water inlet 32, a water suction pump 35 is arranged on the low-level water inlet 32, the heat source side of the second heat exchanger 14 is connected with a heat supply end water supply pipe 15 and a heat supply end water return pipe 22, a third temperature sensor 16 and a second three-way valve 19 are arranged on the heat supply end water supply pipe 15, a biomass boiler 18 is connected with a boiler water outlet pipe 18-2 through a boiler water inlet pipe 18-1, a tenth ball valve 17 is arranged on the boiler water inlet pipe 18-1, the boiler water outlet pipe 18-2 is connected with the second three-way valve 19, and an eleventh ball valve 23 and a fourth circulating water pump 21 are arranged on the heat supply end water return pipe 22.
The hydroelectric generating set 33 comprises an impeller 33-2, a generator 33-3, a water conduit 33-1 and a draft tube 33-4, wherein the water conduit 33-1 and the draft tube 33-4 are connected in parallel with the water tube, the impeller 33-2 is positioned between the water conduit 33-1 and the draft tube 33-4, the impeller 33-2 is connected with the generator 33-3, water flows through the impeller 33-2 through the water conduit 33-1 and drives the impeller to rotate so as to convert water energy into mechanical energy of the impeller 33-2, the mechanical energy is used for pushing the generator, electric energy is obtained, and alternating current output by the hydroelectric generating set 33 is transmitted to the power distribution station 31 through a third alternating current cable 39 and then transmitted to the user terminal 20.
The photovoltaic array 25 is connected with the controller 27 and the inverter 29 through the optical Fu Zhi streamline cable 26, the inverter 29 is connected with the power distribution station 31 through the second alternating current streamline cable 30, the power distribution station 31 is connected with the user terminal 20, the domestic electric power requirements are met, and the power distribution station 31 is powered by the optical Fu Yu potential water pump 35 output by the first alternating current streamline cable 28.
Referring to fig. 3, the method of the present invention comprises the steps of:
in a non-heating period, when irradiance exceeds a set value, preheating the antifreeze liquid when the temperature of the outlet end of the solar heat collector array 1 is lower than the set value, heating the antifreeze liquid in the solar heat collector array 1 to high-temperature antifreeze liquid, conveying the high-temperature antifreeze liquid back to the solar heat collector array 1 through a preheating pipeline 2-4, circulating until the temperature of the outlet end of the solar heat collector array 1 reaches the set value, finishing preheating, after the preheating is finished, heating the antifreeze liquid in the solar heat collector array 1 to high-temperature antifreeze liquid when the temperature of the outlet end of the solar heat collector array 1 is higher than the temperature of the cold source side of the first heat exchanger 3, conveying the antifreeze liquid to the heat source side of the first heat exchanger 3 through the solar heat collector array 1 to perform heat exchange, reducing the temperature of the antifreeze liquid after heat exchange, conveying the low-temperature antifreeze liquid to the solar heat collector array 1 to be reheated, circulating, conveying the low-temperature water in the low-temperature heat storage pond 7 to the cold source side of the first heat exchanger 3 to the heat exchange temperature, conveying the high-temperature water after heat exchange to the heat storage end of the heat storage pond, and after heat exchange to the heat exchange water is not carried out to the heat exchange water, and the low-temperature is stable, namely the heat storage water pond is at the temperature of the heat storage water pond is at the heat storage end of the low temperature of the heat storage pond 3 and the heat storage pond is at the heat storage end of the low temperature side of the heat storage pond 3, and the heat storage water is at the temperature 3, and the temperature is stable, and the temperature is at the temperature 3 is at the temperature different from the heat storage temperature 3, and the heat-stable;
in the heating period, when the water level of the low-level heat storage water tank 7 is higher than the water level of the high-level heat extraction end 6-1, three heat extraction end ports are selected for heat extraction according to resident requirements, when the water level of the low-level heat storage water tank 7 is lower than the water level of the high-level heat extraction end 6-1, the middle-layer heat extraction end 6-2 or the low-level heat extraction end 6-3 is selected for heat extraction, hot water is conveyed to the heat source side of the second heat exchanger 14 for heat exchange, high-temperature water is changed into low-temperature water after heat exchange, the low-level water is conveyed back to the low-level heat storage water tank 7, and heat extraction circulation is completed in a circulating manner;
during the daytime, part of water in the low-level heat storage water tank 7 is pumped to the high-level heat storage water tank 38, the water level of the low-level heat storage water tank 7 cannot be lower than the water level of the middle-layer heat taking end opening 6-2, when the water level reaches the middle-layer heat taking end opening 6-2, water pumping is stopped, meanwhile, the middle-layer heat taking end opening 6-2 is adopted for taking heat, the other part of water in the low-level heat storage water tank 7 is conveyed to the heat source side of the second heat exchanger 14 to participate in heat exchange, hot water after heat exchange and heating is heated, when the temperature meets the heat demand of the user side 20, namely, the difference between the temperature of the outlet of the heat source side of the second heat exchanger 14 and the set temperature T(s) of the user side fluctuates within an allowable fluctuation range DeltaT, if the difference between the temperature of the outlet of the heat source side of the second heat exchanger 14 and the set temperature T(s) of the user side does not meet the allowable fluctuation range DeltaT, different heat taking ends are selected for heat taking, heat is circulated to complete heat supply circulation, when the temperature of the hot water measured and output by the second heat exchanger 14 cannot meet the heat demand of the user side 20, namely, the temperature of the outlet of the second heat source 14 and the hot water is converted into heat demand of the biomass heat through the biomass heat distribution station 20, and the heat demand of the resident station is conveyed to the resident station for the user side 20 through the heat supply station 25, and the heat demand of the resident station is met, and the community by the community when the heat demand is met, and the community is converted by the heat demand of the user side 25, and the user side is heated by the heat station is provided;
at night, water in the high-level heat storage water tank 38 is discharged to the hydroelectric generating set 33, alternating current output by the hydroelectric generating set 33 is transmitted to the user terminal 20 through the power distribution station 31, the night electricity consumption requirement of residents is met, after power generation is completed, water in the hydroelectric generating set 33 is discharged to the low-level heat storage water tank 7, and when the water level of the high-level heat storage water tank 38 is smaller than the lowest water storage level, the hydroelectric generating set 33 is turned off.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, one skilled in the art may make modifications and equivalents to the specific embodiments of the present invention, and any modifications and equivalents not departing from the spirit and scope of the present invention are within the scope of the claims of the present invention.
Claims (10)
1. The solar heat collector array (1) is connected with a preheating pipeline (2-4), the preheating pipeline (2-4) and a first heat exchanger (3) are connected with the solar heat collector array (1) in parallel, a low-level heat storage pool (7) is connected to the cold source side of the first heat exchanger (3), the low-level heat storage pool (7) is connected with a water turbine generator set (33) and a second heat exchanger (14) for heat source measurement, the water turbine generator set (33) is connected with a high-level heat storage pool (38) and a power distribution station (31), the high-level heat storage pool (38) is located above the water turbine generator set (33), the second heat exchanger (14) for heat source measurement and power distribution station (31) is connected with a user terminal (20), and the power distribution station (31) is connected with the photovoltaic array (25);
the low-level heat storage pool (7) is internally provided with a heat storage port (5), a heat taking end port (6), a heat storage end return pipe (9) and a heat taking end return pipe (24), wherein the heat storage port (5), the heat source side of the first heat exchanger (3) and the heat storage end return pipe (9) form a heat storage circulation loop, and the heat taking end port (6), the heat source measuring of the second heat exchanger (14) and the heat taking end return pipe (24) form a heat taking circulation loop.
2. A photovoltaic photo-thermal system combining cross-season heat storage and short-term electricity storage according to claim 1, characterized in that the solar collector array (1) adopts a large-size flat plate collector structure.
3. The photovoltaic and photo-thermal system combining cross-season heat storage and short-term electricity storage according to claim 1, wherein the heat collection circulation heat transfer working medium of the solar heat collector array (1) adopts propylene glycol water solution as antifreeze.
4. The photovoltaic photo-thermal system combining cross-season heat storage and short-term power storage according to claim 1, wherein a biomass boiler (18) is arranged between the heat source measurement of the second heat exchanger (14) and the user side.
5. A photovoltaic photo-thermal system combining cross-season heat storage with short term electricity storage according to claim 1, characterised in that the first heat exchanger (3) and the second heat exchanger (14) are plate heat exchangers.
6. A photovoltaic photo-thermal system combining cross-season heat storage and short-term power storage according to claim 1, characterized in that the heat storage port (5) comprises a high-level heat storage port (5-1), a middle-level heat storage port (5-2) and a low-level heat storage port (5-3), the high-level heat storage port (5-1) is arranged at a position close to the top of the water tank, the middle-level heat storage port (5-2) is arranged in the middle of the water tank, and the low-level heat storage port (5-3) is arranged at a position close to the bottom of the water tank.
7. The photovoltaic photo-thermal system combining cross-season heat storage and short-term electricity storage according to claim 1, wherein the heat collecting port (6) comprises a high-layer heat collecting port (6-1), a middle-layer heat collecting port (6-2) and a low-layer heat collecting port (6-3), the high-layer heat collecting port (6-1) is arranged at a position close to the top of a water tank, the middle-layer heat collecting port (6-2) is arranged in the middle of the water tank, and the low-layer heat collecting port (6-3) is arranged at a position close to the bottom of the water tank.
8. A photovoltaic photo-thermal system combining cross-season heat storage and short term electricity storage according to claim 1, characterized in that the hydro-generator set (33) comprises a water conduit (33-1), an impeller (33-2), a generator (33-3) and a draft tube (33-4), the water conduit (33-1) and draft tube (33-4) are connected in parallel with the water conduit, the impeller (33-2) is located intermediate the water conduit (33-1) and draft tube (33-2), and the impeller (33-2) is connected to the generator (33-3).
9. A photovoltaic photo-thermal system combining cross-season heat storage and short-term power storage according to claim 1, characterized in that a first water level monitor (8) is arranged on the low-level heat storage water tank (7), and a second water level monitor (38-1) is arranged on the high-level heat storage water tank (38).
10. A method of a photovoltaic photo-thermal system combining cross-season heat storage with short term electricity storage according to claim 1 comprising the steps of:
when the temperature of the outlet end of the solar heat collector array (1) is lower than the set temperature in a non-heat supply period, preheating the antifreeze fluid, heating the antifreeze fluid in the solar heat collector array (1), then conveying the antifreeze fluid back to the solar heat collector array (1) through a preheating pipeline (2-4), circulating until the temperature of the outlet end of the solar heat collector array (1) reaches the set temperature, finishing preheating, after the preheating is finished, heating the antifreeze fluid in the solar heat collector array (1) in a state that the temperature of the outlet end of the solar heat collector array is higher than the temperature of the cold source side of the first heat exchanger (3), conveying the antifreeze fluid to the heat source side of the first heat exchanger (3) for heat exchange, conveying the antifreeze fluid in the high temperature to the solar heat collector array (1) for reheating after the heat exchange temperature is reduced, circulating, conveying low-temperature water in the low-temperature heat storage pool (7) to the heat storage port (5) after the temperature is raised by heat exchange of the cold source side of the first heat exchanger (3), and continuously raising the temperature of the low-temperature heat storage pool (7) in a circulating way;
in the heating period, when the water level of the low-level heat storage water tank (7) is at the top of the water tank, the heat-taking end opening (6) at the top, the middle or the bottom is selected for taking heat according to resident demands, when the water level of the low-level heat storage water tank (7) is below the top of the water tank, the heat-taking end opening (6) at the middle or the bottom is selected for taking heat, and after hot water is conveyed to the heat source side of the second heat exchanger (14) for heat exchange, low-level water is conveyed back to the low-level heat storage water tank (7), so that the heat taking cycle is completed in a circulating way;
during the daytime, part of water in the low-level heat storage water tank (7) is pumped to the high-level heat storage water tank (38), the water level of the low-level heat storage water tank (7) cannot be below the middle part of the water tank, when the water level is in the middle part of the water tank, water pumping is stopped, meanwhile, the middle part of the water is adopted to take heat, the other part of water in the low-level heat storage water tank (7) is conveyed to the heat source side of the second heat exchanger (14) for heat exchange, hot water after heat exchange and heating is completed, when the temperature meets the heat demand of a user side (20), namely, when the difference value between the temperature of the outlet of the heat source side of the second heat exchanger (14) and the set temperature T(s) of the user side fluctuates within a fluctuation range, the heated hot water is directly conveyed to the user side (20), if the difference value between the temperature of the outlet of the heat source side of the second heat exchanger (14) and the set temperature T(s) of the user side does not meet the fluctuation within the fluctuation range, the top, the middle part or the bottom of the water is selected for heat taking at the heat, the heat is reciprocally carried out by the heat taking port, when the temperature of the second heat exchanger (14) meets the heat demand of the user side (20) for heat demand of the user side (20), namely, the temperature of the heat source side is not met by the resident (20) is converted into the heat demand by the heat demand of the heat energy storage water, and the user side (25), and the heat demand is conveyed by the resident heat energy is converted by the heat demand by the heat supply station (25), and the user side when the heat demand is met by the user side;
at night, water in the high-order heat storage water tank (38) is discharged to the hydroelectric generating set (33), alternating current output by the hydroelectric generating set (33) is transmitted to the user end (20) through the power distribution station (31), the night electricity consumption requirement of residents is met, after power generation is completed, water in the hydroelectric generating set (33) is discharged to the low-order heat storage water tank (7), and when the water level of the high-order heat storage water tank (38) is smaller than the lowest water storage level, the hydroelectric generating set (33) is closed.
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