CN112815373A - Renewable energy and electric energy multi-energy complementary combined heat pump cold and hot water preparation system - Google Patents
Renewable energy and electric energy multi-energy complementary combined heat pump cold and hot water preparation system Download PDFInfo
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- CN112815373A CN112815373A CN202110054773.8A CN202110054773A CN112815373A CN 112815373 A CN112815373 A CN 112815373A CN 202110054773 A CN202110054773 A CN 202110054773A CN 112815373 A CN112815373 A CN 112815373A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 424
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 230000000295 complement effect Effects 0.000 title claims abstract description 13
- 238000005338 heat storage Methods 0.000 claims abstract description 155
- 239000008399 tap water Substances 0.000 claims description 12
- 235000020679 tap water Nutrition 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 6
- 238000010438 heat treatment Methods 0.000 abstract description 30
- 238000000034 method Methods 0.000 abstract description 20
- 230000008569 process Effects 0.000 abstract description 17
- 238000009833 condensation Methods 0.000 abstract description 3
- 230000005494 condensation Effects 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 238000005057 refrigeration Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000008400 supply water Substances 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
- F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
-
- 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
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
-
- 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
- F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
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- 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
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
- F25B27/005—Machines, plants or systems, using particular sources of energy using solar energy in compression type systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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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
Abstract
The invention discloses a renewable energy and electric energy multi-energy complementary combined heat pump cold and hot water preparation system, which comprises: the solar heat collector, the solar heat storage water tank, the air source heat pump, the water source heat pump, the air-water heat exchanger and the circulating water pump. The specific method comprises the following steps: in winter, the solar heat storage water tank, the air source heat pump and the water source heat pump are used for heating circulating water in a stepped manner to supply heat; in summer, the air source heat pump is used for refrigerating, and meanwhile, the solar heat collecting system is used for supplying domestic hot water. Energy cascade utilization is realized by reasonably constructing a new combined heat pump process. The advantages are that: firstly, a temperature-to-mouth step heating process is constructed, and the system energy efficiency is obviously improved; secondly, the solar energy-electric energy-air energy complementation and dual-purpose use in winter and summer of the system are realized; through a new process, the evaporation temperature of the combined heat pump is increased in winter, the condensation temperature of the heat pump is reduced in summer, and the operation energy efficiency of the unit is obviously improved; fourthly, through a new process, the heat storage temperature difference of the water tank is enlarged, and further the system investment and the occupied area are reduced.
Description
Technical Field
The invention belongs to the technical field of heating and refrigeration, and particularly relates to a renewable energy and electric energy multi-energy complementary combined heat pump cold and hot water preparation system.
Background
At present, in areas with coal-fired heat supply, coal-fired pollution is one of the main causes of haze formation in winter, and the development trend of clean heat supply is greatly promoted.
The change of coal into electricity is one of the important measures for realizing clean heat supply, the surplus electric power in winter is utilized, the heat supply by utilizing the electric drive heat pump is a relatively efficient utilization mode, and an effective way is provided for the consumption of the surplus electric power in winter. However, the average outdoor temperature in winter in cold and severe cold areas is low, and the air source heat pump not only has low heating performance, but also is easy to frost, and has poor application effect. Although the solar energy has wide sources, on one hand, the solar energy is influenced by weather and is not stable enough, and on the other hand, the energy flow density is low, the investment of a heat collection system is large, and the occupied area is large. Therefore, the single renewable energy heating system has unstable heat source temperature and low heat supply guarantee rate, and is difficult to meet the heat supply requirement in winter. The conventional multi-energy complementary heating system is mainly complementary of solar energy and an air source heat pump, is generally only used for meeting the heating requirement in winter, and has the advantages of small solar heat storage temperature difference, high investment cost, low equipment utilization rate and poor economical efficiency.
The invention provides a novel combined heat pump flow with complementary solar energy-electric energy-air energy aiming at a building with dispersed heat supply. The combined heat pump system utilizes the solar heat storage water tank, the air source heat pump and the water source heat pump to construct a temperature opposite step heating process in winter, so that the step utilization of various clean energy sources is realized, the energy utilization efficiency and the heat supply economy of the system are improved, and the stable and efficient operation of the system is ensured; in summer, the air source heat pump is used for refrigerating, and meanwhile, the solar heat collecting system is used for preparing domestic hot water, so that the annual utilization rate of the system is improved. The system can ensure stable heat supply and refrigeration under the working conditions of winter and summer by constructing a new combined heat pump process, and meanwhile, the heating performance and the refrigeration performance of each link of the combined heat pump system are obviously improved. In addition, the solar heat collection system and the combined heat pump system are organically combined, the heat pump bypass circulation is ingeniously arranged, on one hand, the heat of the bypass circulation water is extracted to heat the heat supply network water, on the other hand, the bypass circulation water sequentially passes through the water source heat pump evaporator and the air-water heat exchanger to realize step cooling, the heating performance of the air source heat pump is improved, meanwhile, the heat storage temperature difference of the solar water tank is enlarged, and the system investment and the occupied area are remarkably reduced.
Disclosure of Invention
In order to solve the problems of limited application conditions, insufficient heat supply capacity, system power consumption and the like of a conventional solar energy-air source heat pump combined heat supply system, the invention provides a combined heat pump cold and hot water preparation system which can realize multi-energy complementation of renewable energy and electric energy by heating circulating water in a solar heat storage water tank, an air source heat pump and a water source heat pump in a stepped manner. The heat supply requirement of the building in winter is combined, the operation mode is switched by adjusting the valve, the heat source is reasonably distributed, the gradient utilization of energy is realized, the heat supply requirement of a user is ensured, the energy efficiency of the full operation period of a heat supply system is improved, and the heat supply cost is reduced to a certain extent; the dual-purpose use in winter and summer is realized by switching the valves when seasons change, and the annual utilization rate of the system is improved; by optimizing the system flow, on one hand, the heat collection temperature difference of the solar heat collector is enlarged, the initial investment is reduced, and on the other hand, the operation energy efficiency of the heat pump is improved.
In order to achieve the purpose, the invention adopts the following technical scheme: a renewable energy and electric energy multi-energy complementary combined heat pump cold and hot water preparation system comprises a solar heat collector, a first solar heat storage water tank, a second solar heat storage water tank, an air source heat pump, a water source heat pump, a first circulating water pump, a second circulating water pump and an air-water heat exchanger;
the solar heat collector is provided with a solar heat collector outlet and a solar heat collector inlet, the first solar heat storage water tank is provided with a first solar heat storage water tank inlet, a first solar heat storage water tank outlet, a first solar heat storage water tank central coil inlet and a first solar heat storage water tank central coil outlet, the second solar heat storage water tank is provided with a second solar heat storage water tank inlet, a second solar heat storage water tank outlet, a second solar heat storage water tank central coil inlet and a second solar heat storage water tank central coil outlet, the air source heat pump comprises a first condenser and a first evaporator, the water source heat pump comprises a second condenser and a second evaporator, the first condenser is provided with a first condenser inlet and a first condenser outlet, the water source heat pump is provided with a second condenser inlet, a second condenser outlet, a second evaporator inlet and a second evaporator outlet, the air-water heat exchanger is provided with an air-water heat exchanger inlet and an air-water heat exchanger outlet;
the outlet of the solar heat collector is respectively connected with the inlet of the first solar heat storage water tank and the inlet of the second solar heat storage water tank through a three-way joint, and the outlet of the first solar heat storage water tank and the outlet of the second solar heat storage water tank are both connected with the inlet of the solar heat collector and return to the solar heat collector through a first circulating water pump;
a pipeline P7 and a pipeline P8 which are connected with a return water end of a secondary network and a pipeline P32 which is connected with an outlet end of a second evaporator of a water source heat pump are merged and then connected to an inlet of an air-water heat exchanger, outlets of the air-water heat exchanger are respectively connected with an inlet of a coil in a first solar heat storage water tank and an inlet of a coil in a second solar heat storage water tank, an outlet of the coil in the first solar heat storage water tank is connected with an inlet of a first condenser, an outlet of the coil in the second solar heat storage water tank is connected with an inlet of the first condenser, an outlet of the first condenser is divided by a three-way joint, the first way is connected to an inlet of the second condenser, the second way is connected to an inlet of the second evaporator of the water source heat pump, an outlet of the second condenser is connected with a water supply end of the secondary network, and valves v 29 are respectively arranged in the pipelines P9, P12, P14, P15, P16, P18, P19, P21, P26, P30, v3, v4, v5, v6, v7, v8, v9, v11, v13, v14, v15, v16, v17, v18 and v19, bypass pipelines P23 and P28 are connected between the pipeline P21 and the pipeline P22, and between the pipeline P26 and the pipeline P27, and valves v10 and v12 are arranged in the bypass pipelines P23 and P28 respectively;
the chilled water return end is connected with the inlet of a first condenser through a pipeline, the outlet of the first condenser is connected with the inlet of a cold supply tail end through a pipeline, the outlet of an evaporator of the refrigerating machine is connected to the inlet of an air-water heat exchanger through a pipeline, and the outlet 82 of the air-water heat exchanger is connected to the inlet of the first condenser through a pipeline;
tap water interface links to each other with coil entry in the first solar energy heat storage water tank, the coil entry in the second solar energy heat storage water tank respectively, and coil export is connected to life hot water supply end through the pipeline in the first solar energy heat storage water tank, and coil export is connected to life hot water supply end through the pipeline in the second solar energy heat storage water tank, and two heat storage water tanks are each other supplementary, guarantee user's water demand.
Preferably, the solar heat collector is connected with the first solar heat storage water tank and the second solar heat storage water tank through circulating water pipelines to form a closed circulating loop; and a valve v1 and a first circulating water pump are arranged on the converging circulating water pipeline of the first solar heat storage water tank and the second solar heat storage water tank, and the valve v1 and the first circulating water pump are both opened in the daytime and closed at night.
Preferably, under the working condition of winter, a valve is arranged on a circulating water pipe connecting an outlet of the second evaporator and an inlet of the air-water heat exchanger, two valves are arranged on a circulating water pipe connecting an outlet of the air-water heat exchanger and an inlet of a coil in the first solar heat storage water tank, two valves are arranged on a circulating water pipe connecting an outlet of the air-water heat exchanger and an inlet of a coil in the second solar heat storage water tank, three valves are arranged on a circulating water pipe connecting an outlet of a coil in the first solar heat storage water tank and an outlet of a coil in the second solar heat storage water tank and an inlet of the first condenser, and a valve v11 is arranged on a circulating water pipe connecting an outlet of the first condenser and an inlet of the second condenser; valves v13 and v14 are arranged on a circulating water pipeline connecting the outlet of the first condenser and the inlet of the second evaporator.
Preferably, under the working condition of summer, three valves are arranged on a circulating water pipeline of which the chilled water return end is connected with the outlet end of a first condenser of the air source heat pump, two valves are arranged on the circulating water pipeline of which the outlet end of the first condenser is connected with the inlet end of the air-water heat exchanger, and a valve is arranged on the circulating water pipeline of which the outlet end of the first condenser is connected with the cold supply tail end; for the domestic hot water preparation process, two valves are arranged on a pipeline, connected with a coil inlet in a first solar heat storage water tank, of a tap water replenishing end, two valves are arranged on a pipeline, connected with a coil inlet in a second solar heat storage water tank, of a tap water replenishing end, two valves are arranged on a pipeline, connected with a domestic hot water supply end, of a coil outlet in the first solar heat storage water tank, and two valves are arranged on a pipeline, connected with a domestic hot water supply end, of a coil outlet in the second solar heat storage water tank.
Preferably, under the working condition of operation in winter, the coil pipe, the first condenser, the second evaporator, the air-water heat exchanger and the heat supply tail end in the first solar heat storage water tank are connected through a circulating water pipeline to form a closed circulating loop, the coil pipe, the first condenser, the second evaporator, the air-water heat exchanger and the heat supply tail end in the second solar heat storage water tank are connected through a circulating water pipeline to form a closed circulating loop, and a second circulating water pump is arranged on the circulating water pipeline connected with the inlet of the second evaporator; under the working condition of summer operation, the evaporator, the air-water heat exchanger and the cold supply tail end of the refrigerator are connected through a circulating water pipeline to form a closed circulating loop, and a second circulating water pump is arranged on the circulating water pipeline connected with the inlet of the air-water heat exchanger; and the coil pipe, the domestic hot water supply end and the tap water replenishing end in the solar heat storage water tank are connected to form a domestic hot water supply system.
Preferably, during daytime running under winter conditions, the valves v1, v2, v3, v5, v6, v8, v9, v11, v13 and v14 are all opened, and the valves v4, v7, v10, v12, v15, v16, v17, v18 and v19 are closed; during night operation, valves v1, v2, v3, v4, v7, v8, v9, v11, v13 and v14 are all opened, and valves v5, v6, v10, v12, v15, v16, v17, v18 and v19 are closed; in summer, the method comprises a first combination and a second combination, wherein the first combination is that valves v1, v5, v6, v9, v12, v13, v15, v16, v17, v18 and v19 are all opened, and the rest valves are closed; the second combination is that valves v1, v4, v7, v9, v12, v13, v15, v16, v17, v18 and v19 are all open, and the remaining valves are closed.
Preferably, a valve is arranged on a bypass pipeline of a pipeline connecting the inlet of the first condenser and the outlet of the first condenser, a valve is arranged on a bypass pipeline of a pipeline connecting the inlet of the second condenser and the outlet of the second condenser, and the valves v9, v10, v11 and v12 are switched according to heat supply conditions so as to generate multiple heat supply modes and realize reasonable distribution of heat sources and flexible regulation and control of a system.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in:
1) according to the novel solar energy-electric energy-air energy complementary combined heat pump process, a solar heat storage water tank, an air source heat pump and a water source heat pump are utilized to construct a temperature opposite step heating process in winter, so that complementation and step utilization of various clean energy sources are realized, the overall energy utilization efficiency and economy of the system are improved, and the stable and efficient operation of the system is ensured;
2) the air source heat pump is used for refrigerating in summer, and the solar heat collecting system is used for preparing domestic hot water, so that the system can be used in winter and summer, and the annual utilization rate of the system is improved;
3) the system constructs a new flow of the combined heat pump, introduces a heat pump bypass cycle and is additionally provided with the air-water heat exchanger, improves the evaporation temperature of the heat pump in winter, reduces the condensation temperature of the refrigerator in summer, and realizes the remarkable improvement of the heating performance and the refrigerating performance while ensuring stable heat and cold supply;
4) the invention organically combines the solar heat collecting system and the combined heat pump system, enlarges the heat storage temperature difference of the solar water tank, and obviously reduces the system investment and the occupied area.
Drawings
FIG. 1 is a flow chart of a combined heat pump cold and hot water preparation system with renewable energy and electric energy multi-energy complementation, which is operated in winter and has a radiator at the tail end;
FIG. 2 is a flow chart of the system in the night winter operating mode, with a radiator at the end;
FIG. 3 is a flow chart of the system during winter day operation with the ground coil at the end;
FIG. 4 is a flow chart of the system during night winter operation with the ground coil at the end;
FIG. 5 is a flow chart of the system during summer operation.
Reference numerals:
1. the solar heat collector comprises a solar heat collector, a first solar heat storage water tank, a second solar heat storage water tank, a first condenser, a second condenser, an air source heat pump, a first evaporator, a second evaporator, a water source heat pump, a first evaporator, a second condenser, a second evaporator, a first circulating water pump, a second circulating water pump, a third circulating water pump, a fourth circulating water pump, a fifth circulating water pump, a sixth circulating water pump;
11. a solar heat collector outlet, 12, a solar heat collector inlet, 21, a first solar heat storage water tank inlet, 22, a first solar heat storage water tank outlet, 23, a first solar heat storage water tank coil inlet, 24, a first solar heat storage water tank coil outlet, 31, a second solar heat storage water tank inlet, 32, a second solar heat storage water tank outlet, 33, a second solar heat storage water tank coil inlet, 34, a second solar heat storage water tank coil outlet, 41, a first condenser inlet, 42, a first condenser outlet, 51, a second condenser inlet, 52, a second condenser outlet, 53, a second evaporator inlet, 54, a second evaporator outlet, 81, an air-water heat exchanger inlet, 82, and an air-water heat exchanger outlet.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
The invention is described in further detail below with reference to the accompanying drawings:
the invention relates to a renewable energy and electric energy multi-energy complementary combined heat pump cold and hot water preparation system, which is characterized in that three heat sources of solar energy, air energy and electric energy are used for heating hot water in a stepped manner, so that the energy utilization efficiency and the heat supply economy are improved, the winter heat supply requirement of a user can be met, the heat supply guarantee rate is improved, and the complementary heat supply of various clean energy sources is realized; and the dual-purpose in winter and summer of the system is realized through valve switching, and the annual utilization rate of the unit is improved. The system enlarges the heat collection temperature difference of the solar heat collector by optimizing the flow, and reduces the initial investment; the air-water heat exchanger 8 is additionally arranged to realize the purposes of increasing the evaporation temperature in winter and reducing the condensation temperature in summer for the air source heat pump, thereby improving the energy efficiency of the heat pump.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a flow chart of a renewable energy and electric energy multi-energy complementary combined heat pump cold and hot water preparation system of the present invention, which includes a solar heat collector 1, a first solar heat storage water tank 2, a second solar heat storage water tank 3, an air source heat pump 4, a water source heat pump 5, a first circulating water pump 6, a second circulating water pump 7, and an air-water heat exchanger 8; the air source heat pump 4 includes a first condenser 4a and a first evaporator 4b, and the water source heat pump 5 includes a second condenser 5a and a second evaporator 5 b. The solar heat collector 1 is provided with a solar heat collector outlet 11 and a solar heat collector inlet 12, the first solar heat storage water tank 2 is provided with a first solar heat storage water tank inlet 21, a first solar heat storage water tank outlet 22, a first solar heat storage water tank central coil inlet 23 and a first solar heat storage water tank central coil outlet 24, the second solar heat storage water tank 3 is provided with a second solar heat storage water tank inlet 31 and a second solar heat storage water tank outlet 32, a coil inlet 33 in the second solar thermal storage water tank and a coil outlet 34 in the second solar thermal storage water tank, the air source heat pump 4 is provided with a first condenser inlet 41 and a first condenser outlet 42, the water source heat pump 5 is provided with a second condenser inlet 51, a second condenser outlet 52, a second evaporator inlet 53 and a second evaporator outlet 54, and the air-water heat exchanger 8 is provided with an air-water heat exchanger inlet 81 and an air-water heat exchanger outlet 82. The parts are connected through pipelines, P1-P6 are solar circulating pipelines, P7-P35 are circulating water pipelines, P36 is a tap water replenishing pipeline, P37 is a living hot water supply pipeline, and v 1-v 19 are valves on the pipelines.
Specifically, the method comprises the following steps:
1) under the working condition of winter operation:
the solar heat collection system comprises: a pipeline P1 connected with the water outlet of the solar heat collector is branched by a three-way joint, the first path is connected to the inlet 21 of the first solar heat storage water tank by a pipeline P2, the second path is connected to the inlet 31 of the second solar heat storage water tank by a pipeline P3, a pipeline P4 connected with the outlet 22 of the first solar heat storage water tank and a pipeline P5 connected with the outlet 32 of the second solar heat storage water tank are converged by the three-way joint, enter a pipeline P6 connected with the inlet 12 of the solar heat collector and return to the solar heat collector 1 by a first circulating water pump 6, and a valve v1 is arranged in a pipeline P6;
a heat supply circulating system: the pipelines P7 and P8 connected with the return water end of the secondary network and the pipeline P32 connected with the outlet end 54 of the second evaporator 5b of the water source heat pump 5 are merged and then connected to the inlet 81 of the air-water heat exchanger through the pipelines P9 and P10, the outlet 82 of the air-water heat exchanger is connected to the inlet 23 of the coil in the first solar heat-storage water tank through the pipelines P11, P12, P13 and P15 or connected to the inlet 33 of the coil in the second solar heat-storage water tank through the pipelines P11, P12, P13 and P14, the outlet 24 of the coil in the first solar heat-storage water tank is connected to the inlet 41 of the first condenser through the pipelines P16, P17, P19, P20 and P21, the outlet 34 of the coil in the second solar heat-storage water tank is connected to the inlet 41 of the first condenser through the pipelines P18, P867, P20 and P19 2, the outlet 42 of the first condenser is connected to the pipeline P21 through the bypass joint P21 and the inlet of the second condenser through P21, the second path is connected to a second evaporator inlet 53 of the water source heat pump 5 through pipelines P30 and P31, a second condenser outlet 52 is connected with a secondary network water supply end through pipelines P27 and P29, valves v 33, P33 are respectively arranged in the pipelines P9, P12, P14, P15, P16, P18, P19, P21, P26, P30, P31, P33, valves v 33, and v 33, pipelines P33 and P33 are respectively connected with the pipelines P33 and P33, and bypass valves v 33 and V33 are respectively arranged in the bypass pipelines P33, P33 and P33.
2) In summer, under the operating condition:
a refrigeration cycle system: the return water end of the chilled water is connected with a first condenser inlet 41 through pipelines P7, P33, P34, P20 and P21, an outlet 42 of the first condenser inlet 41 is connected with a cold supply end inlet through pipelines P22, P24, P25, P28 and P29, an outlet 42 of the first condenser inlet 41 is connected with an air-water heat exchanger inlet 81 through pipelines P22, P24, P30, P35 and P10, an outlet 82 of the air-water heat exchanger is connected with the first condenser inlet 41 through pipelines P11, P34, P20 and P21, wherein valves v9, v12, v13, v15, v16 and v17 are respectively arranged on pipelines P21, P28, P30, P33, P34 and P35;
domestic hot water supply system: the solar heat collection process and the connection condition of all parts are consistent with the winter working condition, and the domestic hot water preparation process comprises the following steps: tap water is used as a water supplement and is connected to the coil inlet 23 in the first solar heat storage water tank through pipelines P36, P13 and P15 or is connected to the coil inlet 33 in the second solar heat storage water tank through pipelines P36, P13 and P14, the coil outlet 24 in the first solar heat storage water tank is connected to a domestic hot water supply end through pipelines P16 and P37, the coil outlet 34 in the second solar heat storage water tank is connected to the domestic hot water supply end through pipelines P18, P17 and P37, the two heat storage water tanks are supplementary to ensure the water demand of a user, and valves v4, v5, v6, v7, v18 and v19 are respectively arranged on the pipelines P14, P15, P16, P18, P36 and P37.
The system is divided into two working conditions of winter operation and summer operation, wherein the winter operation working condition is divided into two operation modes of day and night, the summer working condition is divided into two working conditions of refrigeration cycle and domestic hot water supply, the system can realize dual purposes of winter and summer by switching the valve, the annual utilization rate of the system is improved, the service condition of a heat source can be adjusted according to heat supply requirements during winter operation, and flexible switching of multiple operation modes can be performed under different conditions.
Example 1:
under the winter operation condition, first, second solar energy heat accumulation water tank is used for under daytime, two kinds of heat supply operating mode at night respectively. The specific working process and system connection form under the condition that the tail end form is the heat supply of the radiator are as follows:
as shown in fig. 1, in the winter daytime heating operation condition: the first circulating water pump 6 and the second circulating water pump 7 are opened, valves v1, v2, v3, v5, v6, v8, v9, v11, v13 and v14 are all opened, and valves v4, v7, v10, v12, v15, v16, v17, v18 and v19 are closed; solar heat storage process: the solar energy circulating heat storage working medium flows out from an outlet 11 of the solar heat collector and flows into pipelines P2 and P3 through a tee joint of a pipeline P1 in a shunting manner, wherein the pipeline P2 is connected with an inlet 21 of a first solar heat storage water tank, the pipeline P3 is connected with an inlet 31 of a second solar heat storage water tank, an outlet 22 of the first solar heat storage water tank is connected with a pipeline P4, an outlet 32 of the second solar heat storage water tank is connected with a pipeline P5, the heat storage working medium flows into a pipeline P6 through a tee joint of pipelines P4 and P5 in a converging manner, the pipeline P6 is connected with an inlet 12 of the solar heat collector, a first circulating water pump is arranged on the pipeline P6, and the heat storage working medium returns to the solar; a heat supply circulation flow: an inlet 81 of the air-water heat exchanger is connected with a pipeline P10, an outlet 82 of the air-water heat exchanger is connected with a pipeline P11, a pipeline P15 is connected with an inlet 23 of a coil in the first solar heat storage water tank, a pipeline P16 is connected with an outlet 24 of the coil in the first solar heat storage water tank, a pipeline P21 is connected with an inlet 41 of the first condenser, a pipeline P22 is connected with an outlet 42 of the first condenser, a pipeline P26 is connected with an inlet 51 of the second condenser, a pipeline P27 is connected with an outlet 52 of the second condenser, a pipeline P31 is connected with an inlet 53 of the evaporator, a pipeline P32 is connected with an outlet 54 of the evaporator, pipelines P7 and P8 connected with a return water end of a secondary network and a pipeline P32 connected with an outlet 54 of the second evaporator of the water source heat pump 5 are merged and then enter the air-water heat exchanger 8 through pipelines P9 and P10 to preheat air, and the circulating water exchanges heat with air through pipelines P11, P12 and P, P15 is connected to a coil inlet 23 in the first solar heat storage water tank, circulating water is preheated in a coil of the first solar heat storage water tank 2, the preheated circulating water enters a first condenser 4a through pipelines P16, P17, P19, P20 and P21 for heating, the heated heating circulating water flows out of the first condenser 4a through a pipeline P22, the circulating water is divided by a three-way joint in a pipeline P24, the first path enters a second condenser 5a through pipelines P25 and P26 for reheating to reach a heating demand temperature, and then is connected to a secondary network water supply end through pipelines P27 and P29, the second path enters a second evaporator 5b of an electric water source heat pump 5 through pipelines P30 and P31 for heat exchange with a circulating working medium in the heat pump, and the circulating water after heat exchange flows out of the second evaporator 5b through a pipeline P32 to be mixed with the secondary network water for continuous heating circulating process;
as shown in fig. 2, under the working condition of heating in winter at night, the first circulating water pump 6 is turned off, the second circulating water pump 7 is turned on, the valves v1, v2, v3, v4, v7, v8, v9, v11, v13 and v14 are all turned on, and the valves v5, v6, v10, v12, v15, v16, v17, v18 and v19 are turned off; stopping the solar heat storage process at night; a heat supply circulation flow: an inlet 81 of the air-water heat exchanger is connected with a pipeline P10, an outlet 82 of the air-water heat exchanger is connected with a pipeline P11, a pipeline P14 is connected with an inlet 33 of a coil in the second solar heat storage water tank, a pipeline P18 is connected with an outlet 34 of the coil in the second solar heat storage water tank, a pipeline P21 is connected with an inlet 41 of the first condenser 4a, a pipeline P22 is connected with an outlet 42 of the first condenser, a pipeline P26 is connected with an inlet 51 of the second condenser 5a, a pipeline P27 is connected with an outlet 52 of the second condenser, a pipeline P31 is connected with an inlet 53 of the evaporator, a pipeline P32 is connected with an outlet 54 of the evaporator, pipelines P7 and P8 connected with a return water end of the secondary network and a pipeline P32 connected with an outlet 54 of the second evaporator of the water source heat pump 5 are merged and then enter the air-water heat exchanger through pipelines P9 and P10 to preheat air, and the circulating water exchanges heat with air, and then exchanges heat with, P12, P13 and P15 are connected to a coil inlet 33 in the second solar heat storage water tank, circulating water is preheated in a coil of the second solar heat storage water tank 3, the preheated circulating water enters the first condenser 4a through pipelines P18, P19, P20 and P21 to be heated, heated heating circulating water flows out of the first condenser 4a through a pipeline P22, the circulating water is divided by a three-way joint in a pipeline P24, the first path enters the second condenser 5a through pipelines P25 and P26 to be reheated to reach the temperature required by heating, then is connected to a water supply end of a secondary network through pipelines P27 and P29, the second path enters the second evaporator 5b of the heat pump 5 to exchange heat with a circulating working medium in the heat pump through pipelines P30 and P31, the circulating water after heat exchange flows out of the second evaporator 5b through a pipeline P32 to be mixed with the circulating medium in the secondary network to continue to supply heat and circulate water;
for solar energy collection systems there are:
wherein Qsolar-solar heat collection, kJ;
p-intensity of sunlight, W/m2；
S-area of heating, m2；
T-time, h;
y-efficiency;
Grw-total flow of solar energy collection system, m3/h；
t0-inlet temperature, deg.c, of solar thermal storage water tank;
t1-outlet temperature of solar thermal storage water tank, ° c;
cp-specific heat capacity of water, kJ/(kg. DEG C);
for the heating cycle system, there are: g0＝G1+G2
G0·(T2-T1)·cp+G0·(T3-T2)·cp+G1·(Tg-T3)·cp＝G1·(Tg-Th)·cp
So G0·T1-G2·T3＝G1·Th
The air source heat pump 4: g0·(T0-T1)·cp+Ga·(Tin-Tout)·cp，a＝G0·(T3-T2)·cp
A water source heat pump 5: g1·(Tg-T3)·cp＝G2·(T3-T4)·cp
Wherein G is0Total flow of heating circulation system, m3/h；
G1Flow into the water source heat pump evaporator, m3/h；
G2Flow into the condenser of the water source heat pump, m3/h；
Ga-amount of air entering the air source heat pump, m 3/h;
T0-air-water heat exchanger inlet temperature, deg.c;
T1-inlet temperature, deg.c, of the coil of the solar thermal storage water tank;
T2-outlet temperature, deg.c, of coil of solar thermal storage water tank;
T3-air source heat pump evaporator outlet temperature, ° c;
T4-water source heat pump condenser outlet temperature, deg.c;
Tg-temperature of secondary net supply water, deg.c;
Th-secondary net return water temperature, deg.c;
Tin-air inlet temperature, ° c;
Tout-air outlet temperature, ° c;
cp，a-specific heat capacity of air, kJ/(kg. DEG C);
the solar heat storage system can be used for preparing domestic hot water under the working condition in summer, the supply of the domestic hot water in summer is realized, and the working process and the system connection form are as follows:
as shown in fig. 5, v1, v5, v6, v9, v18 and v19 are all opened in summer, and the rest valves are closed; or valves v1, v4, v7, v9, v18, v19 are all open. The solar heat storage flow is the same as the working condition in winter; the domestic hot water preparation process comprises the following steps: the coil inlet and outlet 23 of the first solar heat storage water tank is connected with a pipeline P15, the coil inlet 33 of the second solar heat storage water tank is connected with a pipeline P14, the coil outlet 24 of the first solar heat storage water tank is connected with a pipeline P16, the coil outlet 34 of the second solar heat storage water tank is connected with a pipeline P18, tap water enters the coil of the first solar heat storage water tank 2 through pipelines P36, P13 and P15 as supplemented water or enters the coil of the second solar heat storage water tank 3 through pipelines P36, P13 and P14, the tap water is heated in the coil of the heat storage water tank, the heated domestic hot water is connected to a domestic hot water supply end through the pipelines P16 and P37, or is connected to a domestic hot water supply end through the pipelines P18, P17 and P37, and the two heat storage water tanks are mutually supplemented, so that the water demand of a user is ensured.
For chilled water circulation systems: g0′＝G1′+G2′
G0′·(T5’-Tg′)·cp-G2′·(T6-Tg′)·cp＝G1′·(Th′-Tg′)·cp
Air source heat pump (summer): g0′·(T5-Tg′)·cp-G2′·(T6-Tg′)·cp＝Ga′·(Tout′-Tin′)·cp，a
Wherein G is0' -total flow of cooling circulation system, m3/h；
G1' -flow of chilled water into the tip, m3/h；
G2' -chilled water flow rate, m, of the incoming air-water heat exchanger3/h；
Ga' -amount of air entering air source heat pump
T5-air source heat pump inlet temperature, deg.c;
T6-air-water heat exchanger outlet temperature, deg.c;
Tg' -chilled water supply temperature, ° c;
Th'-return temperature of chilled water,' deg.C；
Tin' -air inlet temperature, ° c;
Tout' -air outlet temperature, ° c;
example 2:
in the case of heating with the end form of a ground coil, the system main body equipment configuration, the circulating water pipeline and the bypass water pipeline are all the same as those in embodiment 1. The difference lies in the opening and closing condition of the valve: in the embodiment 1, the heating circulating water is preheated in the coil pipe and then enters the air source heat pump for heating; in embodiment 2, the tail end is in the form of a ground coil, and the required secondary network water supply temperature is low, so that the heat supply circulating water does not need to be heated in a step manner, and the preheated circulating water is heated once by a water source to reach the temperature required by the secondary network. The working process is as follows:
as shown in fig. 3, in the daytime heating operation condition: the first circulating water pump 6 and the second circulating water pump 7 are opened, valves v1, v3, v5, v6, v8, v10, v11, v13, v14 and v15 are all opened, and valves v2, v4, v7, v9, v12, v16, v17, v18 and v19 are closed; the solar heat storage process is the same as that of example 1; a heat supply circulation flow: the connection form of all the devices of the system is the same as that of the example 1, secondary network return water enters a coil of the first solar heat storage water tank 2 through pipelines P33, P12, P13 and P15 to be preheated, flows out through pipelines P16, P17, P19, P20, P23 and P24, is divided by a three-way joint in a pipeline P24, the first path enters the second condenser 5a through pipelines P25 and P26 to be reheated to reach the heat supply required temperature, is connected to a secondary network water supply end through pipelines P27 and P29, the second path enters the evaporator 5b through a circulating water pump 7, pipelines P30 and P31 to exchange heat with a circulating working medium in a heat pump, the cooled circulating water merges with the secondary network return water three-way joint through pipelines P32 and P8, and enters the coil of the first solar heat storage water tank 2 through P33, P12, P13 and P15 to continue the heat supply circulation process.
As shown in fig. 4, in the night heating operation condition: the first circulating water pump 6 is turned off, the second circulating water pump 7 is turned on, valves v1, v3, v4, v7, v8, v9, v10, v11, v13, v14 and v15 are all opened, and valves v2, v5, v6, v9, v12, v13, v14, v16, v17, v18 and v19 are closed; stopping the solar heat storage process at night; a heat supply circulation flow: the connection form of all the devices of the system is the same as that of the example 1, secondary network return water enters a coil of the second solar heat storage water tank 3 through pipelines P33, P12, P13 and P14 to be preheated, flows out through pipelines P18, P19, P20, P23 and P24, is divided by a three-way joint in a pipeline P24, the first path enters a second condenser 5a through pipelines P25 and P26 to be reheated to reach the heat supply requirement temperature, is connected to a secondary network water supply end through pipelines P27 and P29, the second path enters an evaporator 5b through a circulating water pump 7, pipelines P30 and P31 to exchange heat with a circulating working medium in a heat pump, and the cooled circulating water is converged with the secondary network return water three-way joint through pipelines P32 and P8 and enters the coil of the second solar heat storage water tank 3 through P33, P12, P13 and P14 to continue the heat supply circulation process.
For the heating water circulation system, there are: g0＝G1+G2
G0·(T2-T1)·cp+G1·(Tg-T2)·cp＝G1·(Tg-Th)·cp
So G0·T1-G2·T2＝G1·Th
Water source heat pump: g1·(Tg-T2)·cp＝G2·(T2-T4)·cp
So G0·T1-G1·Tg＝G2·T4
The indoor cooling can be carried out by using the air source heat pump under the working condition in summer, and the working process and the system connection form under the cooling condition in summer are as follows:
as shown in fig. 5, in summer, the first circulating water pump 6 is turned on in the daytime and turned off at night, the second circulating water pump 7 is turned on, the valves v1, v5, v6, v9, v12, v13, v15, v16, v17, v18 and v19 are all turned on, and the rest valves are turned off; or valves v1, v4, v7, v9, v12, v13, v15, v16, v17, v18, v19 are all open. The flow of the domestic hot water supply system and the connection form of each device are the same as those of the example 1; for a cooling cycle system: the first condenser 4a is an evaporator of the refrigerator, and the outdoor unit is a condenser of the refrigerator. Line P21 is connected to first condenser inlet 41, line P22 is connected to first condenser outlet 42, line P10 is connected to air-water heat exchanger inlet 81, and line P11 is connected to air-water heat exchanger outlet 82; the secondary network backwater enters the evaporator 4a of the refrigerator 4 through pipelines P33, P34, P20 and P21 to cool the circulating water, then flows out of the evaporator 4a through a pipeline P22, and is divided by a pipeline P24 three-way joint, the first path of chilled water enters the cooling end through pipelines P25, P28 and P29 to cool the indoor, the second path of chilled water enters the air-water heat exchanger 8 through pipelines P30, P35 and P10 to exchange heat with the air, the outdoor air is pre-cooled, and the circulating water after heat exchange enters the evaporator 4a of the refrigerator 4 through pipelines P11, P34, P20 and P21 to continue cooling circulation. The equilibrium equation for the summer season in example 2 is the same as the equilibrium equation for the summer season in example 1.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.
Claims (7)
1. A renewable energy and electric energy multi-energy complementary combined heat pump cold and hot water preparation system is characterized in that: which comprises a solar heat collector, a first solar heat storage water tank, a second solar heat storage water tank, an air source heat pump, a water source heat pump, a first circulating water pump, a second circulating water pump and an air-water heat exchanger,
the solar heat collector is provided with a solar heat collector outlet and a solar heat collector inlet, the first solar heat storage water tank is provided with a first solar heat storage water tank inlet, a first solar heat storage water tank outlet, a first solar heat storage water tank central coil inlet and a first solar heat storage water tank central coil outlet, the second solar heat storage water tank is provided with a second solar heat storage water tank inlet, a second solar heat storage water tank outlet, a second solar heat storage water tank central coil inlet and a second solar heat storage water tank central coil outlet, the air source heat pump comprises a first condenser and a first evaporator, the water source heat pump comprises a second condenser and a second evaporator, the first condenser is provided with a first condenser inlet and a first condenser outlet, the water source heat pump is provided with a second condenser inlet, a second condenser outlet, a second evaporator inlet and a second evaporator outlet, the air-water heat exchanger is provided with an air-water heat exchanger inlet and an air-water heat exchanger outlet;
the outlet of the solar heat collector is respectively connected with the inlet of the first solar heat storage water tank and the inlet of the second solar heat storage water tank through a three-way joint, and the outlet of the first solar heat storage water tank and the outlet of the second solar heat storage water tank are both connected with the inlet of the solar heat collector and return to the solar heat collector through a first circulating water pump;
a pipeline P7 and a pipeline P8 which are connected with a return water end of a secondary network and a pipeline P32 which is connected with an outlet end of a second evaporator of a water source heat pump are merged and then connected to an inlet of an air-water heat exchanger, outlets of the air-water heat exchanger are respectively connected with an inlet of a coil in a first solar heat storage water tank and an inlet of a coil in a second solar heat storage water tank, an outlet of the coil in the first solar heat storage water tank is connected with an inlet of a first condenser, an outlet of the coil in the second solar heat storage water tank is connected with an inlet of the first condenser, an outlet of the first condenser is divided by a three-way joint, the first way is connected to an inlet of the second condenser, the second way is connected to an inlet of the second evaporator of the water source heat pump, an outlet of the second condenser is connected with a water supply end of the secondary network, and valves v 29 are respectively arranged in the pipelines P9, P12, P14, P15, P16, P18, P19, P21, P26, P30, v3, v4, v5, v6, v7, v8, v9, v11, v13, v14, v15, v16, v17, v18 and v19, bypass pipelines P23 and P28 are respectively connected between the pipeline P21 and the pipeline P22, and between the pipelines P26 and P27, and valves v10 and v12 are respectively arranged in the bypass pipelines P23 and P28;
the outlet of the evaporator of the refrigerating machine is connected to the inlet of the air-water heat exchanger through a pipeline, and the outlet of the air-water heat exchanger is connected to the inlet of the first condenser through a pipeline;
tap water interface links to each other with coil entry in the first solar energy heat storage water tank, the coil entry in the second solar energy heat storage water tank respectively, and coil export is connected to life hot water supply end through the pipeline in the first solar energy heat storage water tank, and coil export is connected to life hot water supply end through the pipeline in the second solar energy heat storage water tank, and two heat storage water tanks are each other supplementary, guarantee user's water demand.
2. The combined heat pump hot and cold water production system with renewable energy and electric energy multi-energy complementation according to claim 1 is characterized in that: the solar heat collector is connected with the first solar heat storage water tank and the second solar heat storage water tank through circulating water pipelines to form a closed circulating loop; and a valve v1 and a first circulating water pump are arranged on the converging circulating water pipeline of the first solar heat storage water tank and the second solar heat storage water tank, and the valve v1 and the first circulating water pump are both opened in the daytime and closed at night.
3. The combined heat pump hot and cold water production system with renewable energy and electric energy multi-energy complementation according to claim 1 is characterized in that: under the working condition of winter, a valve is arranged on a circulating water pipe connecting an outlet of the second evaporator and an inlet of the air-water heat exchanger, two valves are arranged on a circulating water pipe connecting an outlet of the air-water heat exchanger and an inlet of a coil pipe in the first solar heat storage water tank, two valves are arranged on a circulating water pipe connecting an outlet of the air-water heat exchanger and an inlet of a coil pipe in the second solar heat storage water tank, three valves are arranged on circulating water pipes connecting an outlet of the coil pipe in the first solar heat storage water tank and an outlet of the coil pipe in the second solar heat storage water tank and an inlet of the first condenser, and a valve v11 is arranged on a circulating water pipe connecting an outlet of the first condenser and an inlet of the second condenser; valves v13 and v14 are arranged on a circulating water pipeline connecting the outlet of the first condenser and the inlet of the second evaporator.
4. The combined heat pump hot and cold water production system with renewable energy and electric energy multi-energy complementation according to claim 1 is characterized in that: under the working condition of summer, three valves are arranged on a circulating water pipeline of which the chilled water return end is connected with the outlet end of a first condenser of the air source heat pump, two valves are arranged on the circulating water pipeline of which the outlet end of the first condenser is connected with the inlet end of the air-water heat exchanger, and a valve is arranged on the circulating water pipeline of which the outlet end of the first condenser is connected with the cooling tail end; for the domestic hot water preparation process, two valves are arranged on a pipeline, connected with a coil inlet in a first solar heat storage water tank, of a tap water replenishing end, two valves are arranged on a pipeline, connected with a coil inlet in a second solar heat storage water tank, of a tap water replenishing end, two valves are arranged on a pipeline, connected with a domestic hot water supply end, of a coil outlet in the first solar heat storage water tank, and two valves are arranged on a pipeline, connected with a domestic hot water supply end, of a coil outlet in the second solar heat storage water tank.
5. The combined heat pump hot and cold water production system with renewable energy and electric energy multi-energy complementation according to claim 1 is characterized in that: under the working condition of winter operation, the coil pipe, the first condenser, the second evaporator, the air-water heat exchanger and the heat supply tail end in the first solar heat storage water tank are connected through a circulating water pipeline to form a closed circulating loop, the coil pipe, the first condenser, the second evaporator, the air-water heat exchanger and the heat supply tail end in the second solar heat storage water tank are connected through a circulating water pipeline to form a closed circulating loop, and a second circulating water pump is arranged on the circulating water pipeline connected with the inlet of the second evaporator; under the working condition of summer operation, the evaporator, the air-water heat exchanger and the cold supply tail end of the refrigerator are connected through a circulating water pipeline to form a closed circulating loop, and a second circulating water pump is arranged on the circulating water pipeline connected with the inlet of the air-water heat exchanger; and the coil pipe, the domestic hot water supply end and the tap water replenishing end in the solar heat storage water tank are connected to form a domestic hot water supply system.
6. The combined heat pump hot and cold water production system with renewable energy and electric energy multi-energy complementation according to claim 1 is characterized in that: in winter conditions, when the automobile runs in the daytime, valves v1, v2, v3, v5, v6, v8, v9, v11, v13 and v14 are all opened, and valves v4, v7, v10, v12, v15, v16, v17, v18 and v19 are closed; during night operation, valves v1, v2, v3, v4, v7, v8, v9, v11, v13 and v14 are all opened, and valves v5, v6, v10, v12, v15, v16, v17, v18 and v19 are closed; the summer working condition comprises a first combination and a second combination, wherein the first combination is that valves v1, v5, v6, v9, v12, v13, v15, v16, v17, v18 and v19 are all opened; the second combination is that valves v1, v4, v7, v9, v12, v13, v15, v16, v17, v18 and v19 are all open.
7. The combined heat pump hot and cold water production system with renewable energy and electric energy multi-energy complementation according to claim 1 is characterized in that: the first condenser inlet is provided with a valve on the bypass pipeline of the pipeline connected with the first condenser outlet, the second condenser inlet is provided with a valve on the bypass pipeline of the pipeline connected with the second condenser outlet, and the valves v9, v10, v11 and v12 are switched according to the heat supply condition so as to generate multiple heat supply forms and realize reasonable distribution of heat sources and regulation and control of the system.
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| CN114183803A (en) * | 2021-11-16 | 2022-03-15 | 河北工业大学 | Intelligent night heat storage solar heating system |
| CN115059958A (en) * | 2022-06-21 | 2022-09-16 | 西安热工研究院有限公司 | Step heating cleaning and heating system with complementation of geoelectricity and sewage |
| CN115325595A (en) * | 2022-08-05 | 2022-11-11 | 中原工学院 | Multi-energy combined heating system based on heat pump |
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| CN115059958A (en) * | 2022-06-21 | 2022-09-16 | 西安热工研究院有限公司 | Step heating cleaning and heating system with complementation of geoelectricity and sewage |
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