CN114754428B - Solar photovoltaic photo-thermal multifunctional complementary system assisted by natural gas - Google Patents
Solar photovoltaic photo-thermal multifunctional complementary system assisted by natural gas Download PDFInfo
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- CN114754428B CN114754428B CN202210195198.8A CN202210195198A CN114754428B CN 114754428 B CN114754428 B CN 114754428B CN 202210195198 A CN202210195198 A CN 202210195198A CN 114754428 B CN114754428 B CN 114754428B
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 100
- 239000003345 natural gas Substances 0.000 title claims abstract description 50
- 230000000295 complement effect Effects 0.000 title claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 194
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 claims abstract description 108
- 238000005338 heat storage Methods 0.000 claims abstract description 45
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 238000005057 refrigeration Methods 0.000 claims abstract description 20
- 238000011217 control strategy Methods 0.000 claims abstract description 16
- 238000001816 cooling Methods 0.000 claims description 25
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 230000005611 electricity Effects 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000036571 hydration Effects 0.000 claims description 2
- 238000006703 hydration reaction Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims 6
- 238000009833 condensation Methods 0.000 claims 6
- 238000005516 engineering process Methods 0.000 description 12
- 238000004134 energy conservation Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
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- 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
- F24F5/0014—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 using absorption or desorption
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- 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
- F24F5/0017—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 using cold storage bodies, e.g. ice
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- 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
- F24F5/0046—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 using natural energy, e.g. solar energy, energy from the ground
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- 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
- F24F5/0096—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 combined with domestic apparatus
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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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
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/20—Optical components
- H02S40/22—Light-reflecting or light-concentrating means
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- 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
- F24F5/0046—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 using natural energy, e.g. solar energy, energy from the ground
- F24F2005/0064—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 using natural energy, e.g. solar energy, energy from the ground using solar energy
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- 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
- F24F5/0046—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 using natural energy, e.g. solar energy, energy from the ground
- F24F2005/0064—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 using natural energy, e.g. solar energy, energy from the ground using solar energy
- F24F2005/0067—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 using natural energy, e.g. solar energy, energy from the ground using solar energy with photovoltaic panels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/18—Details or features not otherwise provided for combined with domestic apparatus
- F24F2221/183—Details or features not otherwise provided for combined with domestic apparatus combined with a hot-water boiler
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Signal Processing (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Thermal Sciences (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a natural gas-assisted solar photovoltaic photo-thermal multifunctional complementary system which comprises a low-concentration PV/T subsystem, a natural gas-assisted heater subsystem, a heat pump subsystem, a lithium bromide refrigeration subsystem, an indoor terminal system and a heat storage water tank. The low-power concentrating PV/T subsystem is used for providing electric energy and heat energy, and the heat energy output end of the low-power concentrating PV/T subsystem is connected with the heat storage water tank. The natural gas auxiliary heater subsystem and the heat pump subsystem are both connected with an inlet of an indoor terminal system, and an outlet of the indoor terminal system is connected with the concentrating photovoltaic photo-thermal subsystem; the heat pump subsystem is connected with the lithium bromide refrigeration subsystem. The invention adopts low-concentration PV/T equipment, and the multifunctional complementary mode is innovative, firstly adopts heat pump assistance, and adopts natural gas assisted heating mode to operate when the heat pump temperature can not meet the heating or refrigerating requirements. The PV/T can provide both a heat source and electrical energy, thus prioritizing the heat pump in terms of control strategy, natural gas as a secondary auxiliary heat source.
Description
Technical Field
The invention relates to the technical field of concentrating photovoltaic photo-thermal, natural gas auxiliary heating equipment, heat pumps and lithium bromide refrigerators, in particular to a natural gas auxiliary low-concentration light Fu Ouge photo-thermal-heat pump-lithium bromide refrigerator thermoelectric cooling multifunctional complementary system.
Background
At present, under the large background of global energy conservation and emission reduction, renewable energy technologies represented by solar energy technologies are mature, and have wide application and popularization prospects. The photovoltaic photo-thermal technology can provide electric energy and heat energy under the condition of sufficient solar irradiation so as to meet the cold/heat/electric load requirements. The concentrating photovoltaic photo-thermal technology adopts the compound parabolic concentrator on the basis of the photovoltaic photo-thermal technology, and under the action of the concentrator, the irradiation intensity of the photovoltaic cell in unit area can be further increased, so that the system cost is effectively reduced, the heat energy grade is improved, and the overall efficiency is greatly improved. The condensing lens with low light concentration ratio is selected, and heat matched with the daily life needs of residents can be produced, so that the low light concentration photovoltaic photo-thermal (PV/T) has great potential in energy supply of buildings such as houses, office buildings and hospitals.
Solar energy has the characteristics of randomness and volatility, and the instability of the system can be caused by using the solar energy only as the energy input of a multi-energy complementary system, so that the reliability of the system is seriously reduced. It is therefore desirable to couple with devices that can provide energy replenishment to improve the reliability of the system. The natural gas is used as the most main fossil fuel in the combined cooling/heating/power system, has the advantages of high heat value, convenient transportation and the like, and is applied to the distributed combined cooling/heating/power system complementary with solar energy. At present, with the maturity of heat pump technology, more energy-conserving, environmental protection's heating refrigeration mode has replaced traditional mode gradually and has been used in everywhere, couples photovoltaic photo-thermal technology and heat pump technology, and the heat pump can be as low spotlight PV/T's heat supplement, fills low spotlight PV/T remaining heat vacancy under the condition that irradiation condition is relatively poor, improves the energy level of heat simultaneously. The absorption lithium bromide refrigerator is used as a common refrigeration technology at present, and the heat energy level generated by the heat pump is improved so as to drive the lithium bromide refrigerator to stably operate, thereby effectively realizing energy cascade utilization and fully meeting the cold load of users.
Therefore, the high-efficiency combination of the natural gas-assisted low-concentration photovoltaic photo-thermal technology and the heat pump and lithium bromide refrigerator technology effectively improves the comprehensive utilization efficiency of the multi-energy complementary system. After the low-concentration PV/T subsystem absorbs radiation, the photovoltaic cells therein generate electricity which can be used for: satisfy user's electricity demand, store to the battery, uses such as the consumer in the electric energy internet surfing and the actuating system, heat energy can be used to: the system meets the heat load of users, provides heat energy for the refrigeration of lithium bromide refrigerator, supplies domestic hot water and the like, has higher reliability, and can fully meet the demands of users.
Disclosure of Invention
The invention aims to overcome the defects of solar energy intermittence and fluctuation, adopts solar energy as the energy input of the system, adopts a heat pump as a primary auxiliary heat source and adopts natural gas as a secondary auxiliary heat source, and through adding equipment such as a lithium bromide refrigerator and the like, the invention effectively satisfies the annual stable operation of a multi-energy complementary system, can realize the cascade utilization of energy, fully improves the comprehensive utilization efficiency of the multi-energy complementary system and realizes deep energy conservation and emission reduction.
In order to solve the technical problems, the invention adopts the following technical scheme:
A natural gas-assisted solar photovoltaic photo-thermal multifunctional complementary system mainly comprises a low-concentration PV/T subsystem, a natural gas-assisted heater subsystem, a heat pump subsystem, a lithium bromide refrigeration subsystem, an indoor terminal system, a data monitoring system, a circulating water pump and a heat storage water tank. The low-concentration PV/T subsystem is used for providing electric energy and heat energy, the electric energy is used for meeting the electricity demand of users or in the system, the redundant electric energy can be connected with the internet or stored in the storage battery, and the heat energy can meet the demands of the users on heat load, production of domestic hot water and heat pump source measurement. In summer, the heat pump subsystem is used for providing a heat source for the lithium bromide refrigerator, and the lithium bromide refrigerator subsystem meets the cold load of a user. In both the refrigeration and heating modes, natural gas is used as a secondary auxiliary heat source.
Electrical circuit for a multi-energy complementary system: firstly, a low-concentration PV/T subsystem circuit is connected with a maximum power point tracking solar controller, the maximum power point tracking solar controller is respectively connected with a storage battery and an inverter, and finally, the inverter is connected with a user load side and a power grid. Thermal circuit for a multi-energy complementary system: the cooling water enters the low-concentration PV/T subsystem, absorbs the heat of the battery plate, enters the water inlet end of the heat storage water tank, the water outlet end of the heat storage water tank is connected with the domestic hot water end of the user side, the other water outlet end is connected with a water pump and a fourth electric three-way valve, and hot water respectively flows to the water inlet end of the heat source side of the heat pump and the water inlet end of the second electric three-way valve after entering the fourth electric three-way valve. The water outlet end of the heat source side of the heat pump is connected with a third electric three-way valve, and hot water enters the third electric three-way valve after heat exchange in the heat pump, and then is converged with water at the water outlet end of the indoor tail end system and flows to the water inlet end of the heat storage water tank; the water outlet end of the heat storage water tank is connected with a water pump and a flowmeter, and is communicated with the water inlet end of the concentrating photovoltaic photo-thermal assembly.
For the heat pump load side circuit: the water outlet end of the load side of the heat pump is connected with the water inlet end of the heat storage water tank containing the auxiliary heater, and the heat storage water tank can carry out auxiliary heating on hot water according to requirements. The water outlet end of the heat storage water tank with the auxiliary heater is connected with a water pump and a fourth electric three-way valve, and when heating in winter, hot water flows from the water outlet end of the fourth electric three-way valve to the water inlet end of the second electric three-way valve, and is converged with the produced hot water of the low-concentration PV/T subsystem, and flows into the water inlet end of the indoor tail end system; in summer, hot water flows from a fourth electric three-way valve behind the heat storage water tank with the auxiliary heater to the water inlet end of the heat source side of the lithium bromide refrigerator, and flows to the water inlet end of the heat pump load side after heat exchange.
The lithium bromide refrigeration subsystem comprises a lithium bromide refrigerator and a cooling tower. The water outlet end of the load side of the lithium bromide refrigerator is connected with the indoor end system, and cold water of the lithium bromide refrigerator flows into the water inlet end of the load side of the lithium bromide refrigerator after entering the indoor end system for heat exchange; the water outlet end of the cooling side of the lithium bromide refrigerator is communicated with the water inlet end of the cooling tower, and the water outlet end of the cooling tower comprises a water pump which is communicated with the water inlet end of the cooling side of the lithium bromide refrigerator.
The indoor terminal system is a capillary network system, two groups of capillary networks in the drawing are respectively capillary network systems under working conditions of summer and winter, and the capillary network systems under different working conditions are respectively drawn for clarity in the drawing.
The heat pump subsystem is a water source heat pump subsystem.
The low-power concentrating PV/T subsystem comprises a concentrating mirror, a photovoltaic photo-thermal assembly, a maximum power point tracking controller, an inverter and a storage battery.
Compared with the prior art, the natural gas-assisted solar photovoltaic photo-thermal multi-energy complementary system provided by the invention can effectively realize energy cascade utilization, reduces system energy consumption and improves comprehensive utilization efficiency of the multi-energy complementary system. The condensing lens used by the low-power condensing PV/T subsystem can improve the irradiation quantity of the battery in unit area, greatly reduce the technical cost and effectively improve the grade of heat energy output. The heat pump can ensure that the multi-energy complementary system is stable and effectively meets the heat requirement, and can be used as a heat source of the lithium bromide refrigerator, so that the subsystem of the lithium bromide refrigerator operates stably and efficiently, and the cooling in summer is effectively realized. When the heat pump cannot efficiently provide a heat source, a natural gas auxiliary heating mode is adopted to provide a stable heat source for the heating and cooling modes. The invention establishes a multi-energy complementary system suitable for residents by a new system design, and the system takes solar energy as energy input, follows energy cascade utilization and ensures the system to run efficiently, energy-saving and stably all the year round.
Drawings
FIG. 1 is a schematic diagram of a natural gas-assisted solar photovoltaic photo-thermal multifunctional complementary system.
Reference numerals in the drawings are as follows: 1-low power concentrating PV/T subsystem; 2-a maximum power point tracking controller; 3-a storage battery; a 4-inverter; 5-an electric grid; 6-a flow meter; 7-a circulating water pump; 8-an electrical load; 9-a heat storage water tank; 10-a user living hot water end; 11-an electric three-way valve; 12-a heat pump; 13-a heat storage water tank containing an auxiliary heater; 14-lithium bromide refrigerator; 15-a cooling tower; 16-indoor end system; 17-shut-off valve.
Detailed Description
The present invention will be described in detail below with reference to the drawings and examples.
A natural gas-assisted solar photovoltaic photo-thermal multifunctional complementary system uses a low-concentration PV/T as a main heat source, and a heat pump subsystem and a natural gas-assisted heater subsystem as auxiliary heat sources to meet the requirements of cold, heat and electricity; the system comprises a low-concentration PV/T subsystem, a natural gas auxiliary heater subsystem, a heat pump subsystem, a lithium bromide refrigeration subsystem, an indoor end system 16 and a hot water storage tank 9. The low-power concentrating PV/T subsystem is used for providing electric energy and heat energy, the heat energy output end of the low-power concentrating PV/T subsystem is connected with the heat storage water tank 9, and the heat storage water tank 9 is connected with the domestic hot water end 10 of a user; the electric energy generated by the low-power concentrating PV/T subsystem is used for meeting the electricity consumption requirement in a user side load or a natural gas auxiliary solar photovoltaic photo-thermal multi-energy complementary system; the heat energy generated by the low-concentration PV/T subsystem can meet the requirements of heat load on the user side, hot water production and living, heat source on the heat pump source side and driving heat source of the lithium bromide refrigerator. The natural gas auxiliary heater subsystem and the heat pump subsystem are both connected with an inlet of the indoor end system 16, and an outlet of the indoor end system 16 is connected with the concentrating photovoltaic photo-thermal subsystem; the heat pump subsystem is connected with the lithium bromide refrigeration subsystem. The low-concentration PV/T is a main heat source; the heat pump subsystem and the natural gas auxiliary heater subsystem are auxiliary heat sources, and when the heat pump subsystem is insufficient in heat source, the natural gas auxiliary heater subsystem supplies heat.
The operation control of the natural gas-assisted concentrating photovoltaic photo-thermal multifunctional complementary system is realized according to two main parameters, wherein the first parameter is the temperature of an experimental room, and the second parameter is the temperature of a loop heat storage water tank 9 of the low-concentration PV/T system. The temperature of the experimental room is the most basic parameter for controlling the start and stop of the equipment. In order to meet the requirements of all working conditions of an experimental room on comfort and achieve the purpose of energy conservation, the room temperature parameters are set according to a heating ventilation air conditioning design manual. The room temperature in winter is maintained at 20 ℃ and fluctuates by 1 ℃ up and down, and the room temperature in summer is maintained at 25 ℃ and fluctuates by 1 ℃ up and down. The heating mode is activated when the room temperature is below 20 c and the cooling mode is activated when the room temperature is above 25 c. The second parameter, the temperature of the thermal storage tank 9. The temperature is an index for determining what auxiliary heat source device is activated.
In the heating mode, three control strategies of the natural gas-assisted low-concentration PV/T multi-energy complementary system are expressed as follows:
Control strategy one: when the temperature of the heat storage water tank 9 is more than or equal to 40 ℃, the low-concentration PV/T system direct supply mode is adopted. The direct supply mode of the low-power concentrating PV/T system is that the low-power concentrating PV/T system is directly used as a heat source for heating an experimental room, and the temperature of the experimental room is maintained stable.
And a control strategy II: when the temperature of the heat storage water tank 9 is lower than 40 ℃ but higher than 15 ℃, the low-concentration PV/T system cannot meet the heat load requirement of a room due to the water source temperature, and auxiliary heating equipment is needed. For the above reasons. The coupling mode can not only improve the comprehensive utilization efficiency of the low-power concentrating PV/T system, but also improve the COP value of the water source heat pump unit.
And a control strategy III: when the temperature of the heat storage water tank 9 is lower than 15 ℃ in continuous overcast and rainy weather or at night, natural gas is selected as an auxiliary heat source in consideration of cost, energy efficiency and other factors. In the operation mode, the low-concentration PV/T system and the low-temperature water source heat pump are not used as heat sources for heating rooms, and only natural gas is used as a heat supply source for the only rooms.
In the refrigeration mode, there are two control strategies for the natural gas-assisted low-concentration PV/T multi-energy complementary system.
Control strategy one: when the temperature of the heat storage water tank 9 is greater than or equal to 40 ℃, hot water in the heat storage water tank 9 is used as a heat source of a high-temperature water source heat pump (HHP), and the high-temperature water source heat pump provides a heat source of about 90 ℃ for the single-effect absorption type lithium bromide refrigerator, so that the single-effect absorption type lithium bromide refrigerator is driven to meet the refrigeration requirement of a room.
And a control strategy II: when the temperature of the heat storage water tank 9 is less than 40 ℃, the high-temperature water source heat pump is not started any more, and the natural gas auxiliary heater is directly adopted as a heat source of the absorption lithium bromide refrigerating unit.
The heat generated by the low-concentration PV/T system is used for preheating domestic hot water. The low-concentration PV/T system is used as a heat source for preheating domestic hot water when the multi-energy complementary system is not required to provide heating heat and driving refrigeration heat for a room and the PV/T system meets basic operation conditions.
Further, the lithium bromide refrigeration subsystem comprises a lithium bromide refrigerator 14 and a cooling tower 15. The water outlet end of the load side of the lithium bromide refrigerator 14 is connected with the indoor end system 16, and cold water of the lithium bromide refrigerator 14 flows into the water inlet end of the load side of the lithium bromide refrigerator after entering the indoor end system 16 for heat exchange; the water outlet end of the cooling side of the lithium bromide refrigerator is communicated with the water inlet end of the cooling tower, and the water outlet end of the cooling tower 15 is provided with a water pump 7 which is communicated with the water inlet end of the cooling side of the lithium bromide refrigerator. In summer, the heat pump subsystem is used to provide a heat source for the lithium bromide refrigerator 14, with the lithium bromide refrigerator subsystem meeting the user's cooling load.
Further, the surplus electric energy of the concentrated photovoltaic photo-thermal subsystem can be used for surfing the internet or stored in the storage battery 3.
Further, in the thermal loop of the multi-energy complementary system, cooling water after heat release from the user side circulation enters the low-concentration PV/T subsystem, after heat of the battery plate is absorbed, the cooling water enters the water inlet end of the heat storage water tank 9, the water outlet end of the heat storage water tank 9 is connected with the domestic hot water end of the user side, the other water outlet end is connected with the water pump 7 and the first electric three-way valve 11, and hot water respectively flows to the water inlet end of the heat pump heat source side and the water inlet end of the second electric three-way valve 11 after entering the first electric three-way valve 11. The water outlet end of the heat source side of the heat pump is connected with a third electric three-way valve 11, and after the heat exchange of the hot water in the heat pump 12 is completed, the hot water enters the third electric three-way valve 11 and flows to the water inlet end of the heat storage water tank 9 together with the hydration flow of the water outlet end of the indoor tail end system 16; the water outlet end of the heat storage water tank 9 is connected with a water pump 7 and a flowmeter 6, and is communicated with the water inlet end of the concentrating photovoltaic photo-thermal assembly 1.
Further, in the loop of the heat pump load side, the water outlet end of the heat pump load side is connected with the water inlet end of the hot water storage tank 13 with the auxiliary heater, and the hot water storage tank 9 can perform auxiliary heating on hot water according to requirements. The water outlet end of the heat storage water tank 13 containing the auxiliary heater is connected with a water pump 7 and a fourth electric three-way valve 11, and when heating in winter, hot water flows from the water outlet end of the fourth electric three-way valve 11 to the water inlet end of the second electric three-way valve 11, and is converged with the produced hot water of the concentrating photovoltaic photo-thermal subsystem, and flows into the water inlet end of the indoor tail end system 16; in summer, hot water flows from the fourth electric three-way valve 11 behind the hot water storage tank 13 containing the auxiliary heater to the heat source side water inlet end of the lithium bromide refrigerator 14, and after heat exchange, flows to the heat pump load side water inlet end.
The indoor end system 16 is a capillary network system, two groups of capillary networks in the drawing are respectively capillary network systems under summer working conditions and winter working conditions, and the capillary network systems under different working conditions are respectively drawn for clarity in the drawing.
The heat pump subsystem is a water source heat pump subsystem.
The invention is characterized in that low-concentration PV/T equipment is adopted, a multi-energy complementary mode is innovative, firstly, heat pump assistance is adopted, and when the heat pump temperature cannot meet the heating or refrigerating requirement, a natural gas assisted heating model is adopted for operation. The PV/T can provide both a heat source and electrical energy, thus prioritizing the heat pump in terms of control strategy, natural gas as a secondary auxiliary heat source. The system is designed to match the low concentration PV/T technology with proper operation mode.
Claims (6)
1. A solar photovoltaic photo-thermal multifunctional complementary system assisted by natural gas is characterized in that: the system comprises a low-power condensation PV/T subsystem, a natural gas auxiliary heater subsystem, a heat pump subsystem, a lithium bromide refrigeration subsystem, an indoor end system (16) and a heat storage water tank (9); the low-power concentrating PV/T subsystem is used for providing electric energy and heat energy, the heat energy output end of the low-power concentrating PV/T subsystem is connected with the heat storage water tank (9), and the heat storage water tank (9) is connected with the user life hot water end (10); the electric energy generated by the low-power concentrating PV/T subsystem is used for meeting the electricity consumption requirement in a user side load or a natural gas auxiliary solar photovoltaic photo-thermal multi-energy complementary system; the heat energy generated by the low-power concentrating PV/T subsystem can meet the requirements of heat load on a user side, hot water production and living, heat source on a heat pump source side and a driving heat source of a lithium bromide refrigerator; the natural gas auxiliary heater subsystem and the heat pump subsystem are both connected with an inlet of an indoor end system (16), and an outlet of the indoor end system (16) is connected with the low-concentration PV/T subsystem; the heat pump subsystem is connected with the lithium bromide refrigeration subsystem; the low-concentration PV/T subsystem is a main heat source; the heat pump subsystem and the natural gas auxiliary heater subsystem are auxiliary heat sources, and when the heat pump subsystem is insufficient in heat source, the natural gas auxiliary heater subsystem supplies heat;
The operation control of the natural gas auxiliary solar photovoltaic photo-thermal multifunctional complementary system is realized according to two main parameters, wherein the first parameter is the temperature of an experimental room, and the second parameter is the temperature of a low-concentration PV/T subsystem loop heat storage water tank (9); the temperature of the experimental room is the most basic parameter for controlling the start and stop of the equipment; the room temperature is maintained at 20 ℃ in winter and fluctuates at 1 ℃ up and down, and the room temperature is maintained at 25 ℃ in summer and fluctuates at 1 ℃ up and down; when the room temperature is lower than 20 ℃, starting a heating mode, and when the room temperature is higher than 25 ℃, starting a cooling mode; a second parameter, the temperature of the hot water storage tank (9); the temperature is an index for judging what auxiliary heat source device is started;
Under the heating mode, three control strategies of the natural gas-assisted solar photovoltaic photo-thermal multi-energy complementary system are expressed as follows:
control strategy one: when the temperature of the heat storage water tank (9) is more than or equal to 40 ℃, the direct supply mode of the low-concentration PV/T subsystem is adopted at the moment; the direct supply mode of the low-power condensation PV/T subsystem is that the low-power condensation PV/T subsystem is directly used as a heat source for heating an experimental room, and the temperature of the experimental room is maintained to be stable;
And a control strategy II: when the temperature of the heat storage water tank (9) is lower than 40 ℃ but higher than 15 ℃, the low-concentration PV/T subsystem provides water source temperature which cannot meet the requirement of the heat load of a room, and auxiliary heating equipment is needed; the outlet water of the low-power concentrating PV/T subsystem is used as heat source water of a low-temperature water source heat pump, and the coupling mode improves the comprehensive utilization efficiency of the low-power concentrating PV/T subsystem and improves the COP value of a water source heat pump unit;
And a control strategy III: when the temperature of the heat storage water tank (9) is lower than 15 ℃ in continuous overcast and rainy weather or at night, natural gas is selected as an auxiliary heat source; neither the low-power concentrating PV/T subsystem nor the low-temperature water source heat pump is used as a heat source for heating a room, and natural gas is used as the only heat source for heating the room;
In a refrigeration mode, two control strategies exist for a natural gas-assisted solar photovoltaic photo-thermal multifunctional complementary system;
control strategy one: when the temperature of the heat storage water tank (9) is higher than or equal to 40 ℃, hot water in the heat storage water tank (9) is used as a heat source of a high-temperature water source heat pump, and the high-temperature water source heat pump provides a heat source of about 90 ℃ for a single-effect absorption lithium bromide refrigerator, so that the single-effect absorption lithium bromide refrigerator is driven to meet the refrigeration requirement of a room;
And a control strategy II: when the temperature of the heat storage water tank (9) is lower than 40 ℃, the high-temperature water source heat pump is not started any more, and a natural gas auxiliary heater is directly adopted as a heat source of the absorption lithium bromide refrigerating unit;
The heat generated by the low-power concentrating PV/T subsystem is used for preheating domestic hot water; the low-power condensation PV/T subsystem is used as a heat source for preheating domestic hot water when the low-power condensation PV/T subsystem meets basic operation conditions when the multi-energy complementary system is not required to provide heating heat and driving refrigeration heat for a room.
2. A natural gas assisted solar photovoltaic photo-thermal multi-energy complementary system according to claim 1, characterized in that: the lithium bromide refrigeration subsystem comprises a lithium bromide refrigerator (14) and a cooling tower (15); the load side water outlet end of the lithium bromide refrigerator (14) is connected with the indoor end system (16), and cold water of the lithium bromide refrigerator (14) enters the indoor end system (16) for heat exchange and then flows into the load side water inlet end of the lithium bromide refrigerator; the water outlet end of the cooling side of the lithium bromide refrigerator is communicated with the water inlet end of the cooling tower, the water outlet end of the cooling tower (15) comprises a third water pump, and the third water pump is communicated with the water inlet end of the cooling side of the lithium bromide refrigerator; in summer, the heat pump subsystem is used for providing a heat source for the lithium bromide refrigerator (14), and the lithium bromide refrigerator subsystem meets the cooling load of a user.
3. A natural gas assisted solar photovoltaic photo-thermal multi-energy complementary system according to claim 1, characterized in that: the excess electrical energy of the low-power concentrating PV/T subsystem can be used for surfing the internet or stored into a battery (3).
4. A natural gas assisted solar photovoltaic photo-thermal multi-energy complementary system according to claim 1, characterized in that: in a thermal loop of the multi-energy complementary system, cooling water after heat release from a user side circulation enters a low-power condensation PV/T subsystem, after heat of a battery plate is absorbed, the cooling water enters a water inlet end of a heat storage water tank (9), a water outlet end of the heat storage water tank (9) is connected with a domestic hot water end of the user side, the other water outlet end is connected with a first water pump and a first electric three-way valve, and hot water flows to a water inlet end of a heat source side of a heat pump and a water inlet end of a second electric three-way valve respectively after entering the first electric three-way valve; the water outlet end of the heat source side of the heat pump is connected with a third electric three-way valve, and after the heat exchange of the hot water in the heat pump (12) is finished, the hot water enters the third electric three-way valve and flows to the water inlet end of the heat storage water tank (9) together with the hydration flow of the water outlet end of the indoor tail end system (16); the water outlet end of the heat storage water tank (9) is connected with a first water pump and a flowmeter (6) and is communicated with the water inlet end of the concentrating photovoltaic photo-thermal assembly (1).
5. A natural gas assisted solar photovoltaic photo-thermal multi-energy complementary system according to claim 1, characterized in that: the water outlet end of the load side of the heat pump subsystem is connected with the water inlet end of a heat storage water tank (13) with an auxiliary heater, and the heat storage water tank (9) carries out auxiliary heating on hot water according to requirements; the water outlet end of the heat storage water tank (13) containing the auxiliary heater is connected with a second water pump and a fourth electric three-way valve, and when heating in winter, hot water flows from the water outlet end of the fourth electric three-way valve to the water inlet end of the second electric three-way valve, and is converged with the produced hot water of the low-concentration PV/T subsystem, and flows into the water inlet end of the indoor tail end system (16); in summer, hot water flows from a fourth electric three-way valve behind a heat storage water tank (13) containing an auxiliary heater to a water inlet end at the heat source side of a lithium bromide refrigerator (14), and flows to a water inlet end at the load side of a heat pump subsystem after heat exchange.
6. A natural gas assisted solar photovoltaic photo-thermal multi-energy complementary system according to claim 1, characterized in that: the indoor end system (16) is a capillary network system.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679232A (en) * | 2015-11-11 | 2017-05-17 | 华北电力大学 | Low light concentration solar energy heat/electricity/cold integrated system |
| CN106839217A (en) * | 2017-03-13 | 2017-06-13 | 嘉兴学院 | De- electrically independent operation combined type heat pump air conditioner system and its control method |
| CN108194202A (en) * | 2018-01-10 | 2018-06-22 | 华北电力大学 | A kind of condensation photovoltaic/light thermal-coupling natural gas thermoelectric cold triple supply integral system |
| CN109764576A (en) * | 2018-12-19 | 2019-05-17 | 国网山东省电力公司电力科学研究院 | A kind of provide multiple forms of energy to complement each other integrated energy system and its operation method of supply of cooling, heating and electrical powers |
| CN209130970U (en) * | 2018-11-27 | 2019-07-19 | 三泰光大(大连)环境科技有限公司 | A kind of joint energy storage heating system |
| CN110043991A (en) * | 2019-04-12 | 2019-07-23 | 赵耀华 | A kind of building energy supplying system provided multiple forms of energy to complement each other being based primarily upon solar energy and air energy |
| KR102179927B1 (en) * | 2020-01-20 | 2020-11-24 | (주)이맥스시스템 | PVT Cooling and Heating System |
-
2022
- 2022-03-01 CN CN202210195198.8A patent/CN114754428B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679232A (en) * | 2015-11-11 | 2017-05-17 | 华北电力大学 | Low light concentration solar energy heat/electricity/cold integrated system |
| CN106839217A (en) * | 2017-03-13 | 2017-06-13 | 嘉兴学院 | De- electrically independent operation combined type heat pump air conditioner system and its control method |
| CN108194202A (en) * | 2018-01-10 | 2018-06-22 | 华北电力大学 | A kind of condensation photovoltaic/light thermal-coupling natural gas thermoelectric cold triple supply integral system |
| CN209130970U (en) * | 2018-11-27 | 2019-07-19 | 三泰光大(大连)环境科技有限公司 | A kind of joint energy storage heating system |
| CN109764576A (en) * | 2018-12-19 | 2019-05-17 | 国网山东省电力公司电力科学研究院 | A kind of provide multiple forms of energy to complement each other integrated energy system and its operation method of supply of cooling, heating and electrical powers |
| CN110043991A (en) * | 2019-04-12 | 2019-07-23 | 赵耀华 | A kind of building energy supplying system provided multiple forms of energy to complement each other being based primarily upon solar energy and air energy |
| KR102179927B1 (en) * | 2020-01-20 | 2020-11-24 | (주)이맥스시스템 | PVT Cooling and Heating System |
Non-Patent Citations (2)
| Title |
|---|
| 基于太阳能光伏光热组件的双热源热泵机组的实验研究;陈剑波;孙坤;聂琳杰;陈雷田;;制冷学报;20151130;第36卷(第05期);全文 * |
| 太阳能冷热电联供***的策略评估和优化配置;吴红斌;王东旭;刘星月;;电力***自动化;20151110(第21期);全文 * |
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