CN115095895A - Multi-energy combined driving composite system and regulation and control method thereof - Google Patents
Multi-energy combined driving composite system and regulation and control method thereof Download PDFInfo
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- CN115095895A CN115095895A CN202210709550.5A CN202210709550A CN115095895A CN 115095895 A CN115095895 A CN 115095895A CN 202210709550 A CN202210709550 A CN 202210709550A CN 115095895 A CN115095895 A CN 115095895A
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- 239000002131 composite material Substances 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 308
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 238000003860 storage Methods 0.000 claims abstract description 29
- 238000010248 power generation Methods 0.000 claims abstract description 20
- 238000005057 refrigeration Methods 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims description 37
- 238000009826 distribution Methods 0.000 claims description 10
- 230000010354 integration Effects 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 8
- 238000005338 heat storage Methods 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 6
- 230000001502 supplementing effect Effects 0.000 claims description 6
- 238000009825 accumulation Methods 0.000 claims description 4
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- 238000006243 chemical reaction Methods 0.000 claims description 3
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- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
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- 230000000694 effects Effects 0.000 description 4
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- 239000003570 air Substances 0.000 description 2
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- 230000002159 abnormal effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000013589 supplement Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/007—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations the wind motor being combined with means for converting solar radiation into useful energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/10—Combinations of wind motors with apparatus storing energy
- F03D9/11—Combinations of wind motors with apparatus storing energy storing electrical energy
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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
- F24D18/00—Small-scale combined heat and power [CHP] generation systems specially adapted for domestic heating, space heating or domestic hot-water supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1045—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump and solar energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
- F24D3/1058—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system disposition of pipes and pipe connections
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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
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/10—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power including a supplementary source of electric power, e.g. hybrid diesel-PV energy systems
- H02S10/12—Hybrid wind-PV energy systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/20—Systems characterised by their energy storage means
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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
- F24D2101/00—Electric generators of small-scale CHP systems
- F24D2101/20—Wind turbines
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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
- F24D2101/00—Electric generators of small-scale CHP systems
- F24D2101/50—Thermophotovoltaic [TPV] modules
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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
- Y02E10/60—Thermal-PV hybrids
Abstract
The invention discloses a multi-energy combined driving composite system, which comprises a heat supply unit, a water supply unit, a power generation unit and a centralized control module, wherein the heat supply unit is connected with the water supply unit; the heat supply unit consists of a photovoltaic and photo-thermal integrated mechanism, a heat collection water tank, a plate type heat exchanger and a domestic water tank; the photovoltaic and photo-thermal integrated mechanism is connected with end equipment of a building sequentially through the heat collection water tank, the plate heat exchanger and the domestic water tank; the water supply unit consists of a heat source side heat exchanger of a heat pump unit, the heat pump unit and a domestic water tank; the power generation unit consists of a photovoltaic and photo-thermal integrated mechanism, a storage battery pack, a wind generating set, an inverter and a public power grid; the centralized control module is composed of a DCS controller; the invention realizes heating in winter, refrigeration in summer and domestic water supply all the year round for the building, the selection of the ground source heat pump is not limited to a single type, the application range of the regulation and control method is expanded, the self-sufficiency of a composite energy supply system is ensured, green renewable energy is utilized to the maximum degree, and the dependence on the traditional energy is reduced.
Description
The technical field is as follows:
the invention relates to the field of automatic control of heat supply, in particular to a multi-energy combined driving composite system and a regulation and control method thereof.
Background art:
many provinces and governments implement a clean heating policy, great support is provided for related reconstruction or new projects, and a heat pump heating system using renewable energy sources such as air, soil, surface water and the like as heat sources becomes one of important measures for carrying out heating by changing coal into clean energy sources in various places.
In actual operation, the multi-energy coupling heating system is better than a single heat source heating system, but still has a plurality of technical problems to be solved, such as: in the process of stacking complementary heat supply energy sources, the control is disordered, and the characteristics of the respective energy sources are not fully utilized, so that the overall operation efficiency of the system is low; the available temperature range of the heat collecting system is small in the operation process of the multi-energy heat supply system, the solar energy is low in heat gain, the fluctuation is discontinuous, the auxiliary heat source is intermittently put into use, the energy source switching is frequent, and the problems that the tail end heat supply temperature is suddenly cooled and suddenly heated in a heating season are easy to occur.
The single supply mode of the traditional energy is changed, the utilization rate of renewable energy is improved, and the supply and demand balance of a heat source and a user side needs to be considered. The operation adjustment of the heating system is a key link for ensuring the heating quality and safe and stable economic operation of the heating system, and the problems of unqualified heating quality, high heating energy consumption, unstable system operation, even abnormal heating and the like can be caused by improper operation adjustment. Especially embodied in the preceding middle and later stages in heat supply season, if do not utilize means such as quality control or volume regulation to come reasonable control heating effect, the phenomenon that the heating effect height differs easily appears, so the regulation in-process can be followed to the measure of "shifting the peak and filling the valley" of heat supply and guarantee indoor temperature to a certain extent, promotes personnel's travelling comfort of living.
The mode of multiple energy combined heating can effectively promote heat pump set's efficiency to a certain extent, when guaranteeing terminal heating effect, adjusts adaptation load change by oneself, realizes supplying heat as required, reduces water pump and unit unnecessary power consumption, increases renewable energy's utilization efficiency. And matching the high-efficiency and energy-saving building group by using corresponding flow regulation measures. The tail end of a heating system is provided with a temperature control valve and other control devices, the heat supply quantity required by the whole building is used as a measurement standard, the water supply temperature and flow are effectively controlled, and the central control system is used for switching the valve and adjusting the water flow. By means of an intelligent control mechanism, uncertainty problems such as a multi-energy coupling complementary heating mode, purpose, matching degree, energy utilization efficiency, energy consumption level, economy, personnel satisfaction degree and the like are optimized, and therefore intelligent heating capacity of the multi-energy coupling heating system is effectively improved.
The invention content is as follows:
in order to achieve the purpose, the invention adopts the following technical scheme:
a multi-energy combined driving composite system comprises a heat supply unit, a water supply unit, a power generation unit and a centralized control module; the heat supply unit consists of a photovoltaic and photo-thermal integrated mechanism, a heat collection water tank, a plate type heat exchanger and a domestic water tank; the photovoltaic and photo-thermal integrated mechanism is connected with end equipment of a building sequentially through a heat collection water tank, a plate heat exchanger and a domestic water tank; wherein: the photovoltaic and photo-thermal integrated mechanism is connected with the heat collection water tank through a first water temperature and flow monitoring instrument; the heat collecting water passes through a second water pump and the plate heat exchanger; the plate heat exchanger is connected with the domestic water tank through a fifth water pump, a fourth water temperature and flow monitor meter and a second valve respectively; the other path of the domestic water tank is connected with the plate heat exchanger through a seventh water pump and a 3 rd valve, and the plate heat exchanger is connected with the photovoltaic-thermal integrated mechanism through a second water temperature and flow monitoring instrument, the heat collection water tank and the first water pump in sequence; the photovoltaic and photo-thermal integrated mechanism comprises a solar heat collector;
the water supply unit consists of a heat source side heat exchanger of a heat pump unit, the heat pump unit and a domestic water tank; the heat pump unit comprises an evaporator, a compressor, a condenser and an expansion valve which are connected in sequence; wherein: the water inlet pipeline and the water outlet pipeline of the photovoltaic and photothermal integrated mechanism are both connected with the water outlet pipeline of the heat source side heat exchanger of the heat pump unit; the water supply end of the heat exchanger on the heat source side of the heat pump unit is connected with the input end of the heat pump unit through a fourth water pump and a fifth water temperature and flow monitoring instrument in sequence; the output end of the heat pump unit is connected with the output end of the heat pump unit through a ninth valve in sequence; the heat pump unit comprises a heat pump unit 10 and a heat pump unit control system, wherein the heat pump unit comprises an evaporator, a compressor, a condenser and an expansion valve which are connected in sequence; wherein:
the high-temperature water at the water outlet end of the condenser exchanges heat with pipeline water connected with a heat pump unit, one pipeline water is connected with a flow control valve for temperature monitoring and a third water pump through pipelines and then is connected with end equipment of a building, the water outlet end of the end equipment of the building is connected with a fifth valve through a pipeline and then is connected with the water return end of the condenser for heat exchange; the other path of heat exchange process at the water outlet end of the condenser is connected to the water inlet end of the domestic water tank through a sixth water pump, and the water outlet end of the domestic water tank is connected to the water return end of the condenser through a pipeline; the water outlet end of the heat pump unit heat source side heat exchanger is connected with a fourth water pump through a pipeline and then is connected with the water return end of the heat pump unit evaporator;
the power generation unit consists of a photovoltaic and photo-thermal integrated mechanism, a storage battery pack, a wind generating set, an inverter and a public power grid; wherein: the output end of the photovoltaic photo-thermal integrated mechanism is sequentially connected with a storage battery pack, an inverter and the public power grid, and the storage battery pack is also connected with a wind generating set;
the centralized control module is composed of a DCS controller.
Further, the centralized control module realizes building heat supply: the DCS controller is connected with the photovoltaic and photo-thermal integrated unit to control the starting and stopping of the solar thermal collector, the heat of the solar thermal collector is stored by the heat collection water tank, and the middle of the pipeline is provided with a temperature monitoring point to monitor the heat collection temperature of the water tank. The DCS controller controls the loop through the water pump to realize temperature and pressure adjustment; meanwhile, a DCS controller is used for connecting the collected high-temperature water with a water valve actuator in the middle of the plate heat exchanger to control a water path;
the DCS controller realizes the control of the plate heat exchanger by playing a role of a water separator through three water pumps, and sequentially performs pipeline conversion according to the temperature, wherein the water supply temperature T g The temperature is higher than 40 ℃, and the photovoltaic and photo-thermal integrated unit is used for heating; when 40 ℃ is less than T g The temperature is lower than 15 ℃, the photovoltaic and photo-thermal integrated unit is connected with a heat pump unit in series and simultaneously heats heating water; when T is g When the temperature is lower than 15 ℃, the heat pump unit is operated independently for heating, the DCS controller controls the distribution box to control the starting and stopping of the circulating pump, and the pressure sensor is connected in front of the heat pump unit to monitor the inlet pressure of the heat pump unit.
Further, the centralized control module realizes power generation: the DSC controller controls the photovoltaic power generation capacity of the photovoltaic and photothermal integrated unit, the power generation is transmitted to the storage battery for storage, the wind generating set is used for supplementing, the distribution box controls manual and automatic operation of the storage battery, and then the power is transmitted to the inverter, the distribution box controls the power quota to supply to the heat pump unit for operation, redundant power can be merged into a public power grid, and if the power shortage occurs in the use process of the heat pump unit, green electricity is purchased from the public power grid for supplementing.
The invention can also adopt a multi-energy source combined driving composite system to carry out regulation and control method, which comprises the following steps:
the combined system supplies with pipeline, building, return water pipeline through photovoltaic light and heat integration unit, heat storage water tank, plate heat exchanger, heat pump, heat supply operating mode promptly:
when water supply temperature T in photovoltaic and photo-thermal integrated module g The solar energy is utilized to directly supply heat at the temperature higher than 40 ℃, the flow control valve with the temperature monitoring function and the third valve are opened, the first water pump, the second water pump, the third water pump and the fifth water pump are opened, the heat pump unit is closed, the rest valves and the water pumps are closed, only the photovoltaic and photothermal integrated module 1 is used for heating hot water, and the solar energy is utilized to realize energy supply.
When 40 ℃ is less than T g The solar energy system is connected with the heat pump unit in series at the temperature of less than 15 ℃, hot water heated by the photovoltaic and photothermal integrated unit enters the low-temperature heat source water inlet side of the heat pump unit, the third valve, the fourth valve, the flow control valve with temperature monitoring and the ninth valve are opened, all water pumps are opened, the heat pump unit is opened, and the rest valves are closed; the photovoltaic and photo-thermal integrated module and the heat pump unit heat hot water together.
When T is g When the temperature is lower than 15 ℃, the photovoltaic and photothermal integrated module stops running, the heat pump unit is operated independently for heating, the fifth valve, the flow control valve 206 with the temperature monitoring function and the ninth valve are opened, the third water pump and the fourth water pump are opened, the ground source heat pump unit is opened, and the rest valves and the water pumps are closed;
the combined system passes through photovoltaic light and heat integration unit, heat storage water tank, plate heat exchanger, heat pump supply pipeline, domestic water tank, return water pipeline, living hot water energy supply operating mode promptly: the solar energy system and the heat pump unit supply domestic hot water all year round, solar energy is preferentially utilized under the condition of sufficient sunlight, and when the sun is in the mountain or in continuous rainy days, the heat pump unit is taken as the main part to realize the supply of the domestic hot water;
the combined system passes through photovoltaic light and heat integration unit, heat pump set heat source side heat exchanger outlet branch pipe, water pump, wet return, solar energy power supply operating mode promptly:
when the heat pump unit is operated alone for refrigeration in summer, the water outlet end of the evaporator of the heat pump unit flows through the heat exchanger through the ninth valve to release heat, and a heat accumulation phenomenon can be generated, so that the branch pipe flowing through the water outlet side of the heat exchanger is connected to the solar photovoltaic panel in summer and at night, and heat flowing into the heat source side in the daytime is transferred to ambient air and the external environment through the solar photovoltaic panel in a radiation mode; the temperature of the heat source side is well recovered at night, when the operation efficiency of the heat pump unit in the daytime is improved, a part of solar energy is converted into high-quality electric energy by the photovoltaic and photothermal integrated unit and stored in the storage battery pack, when the electric energy in the storage battery pack is sufficient, the rest electric energy is merged into a public power grid through an inverter to supply power to the heat pump unit, the consumption of commercial power electric energy is reduced to the maximum degree, and meanwhile, the wind generating set is connected to the storage battery pack.
Has the beneficial effects that:
the solar photovoltaic power generation system adopts the combined driving of solar photovoltaic power generation, wind power generation, geothermal energy and outsourcing green electricity multiple energy sources, accords with the practice of the national 'double-carbon' policy, and forms a demonstration effect. The building realizes winter heating, summer refrigeration and annual domestic water supply, the selection of the ground source heat pump is not limited to a single type, the application range of the regulation and control method is expanded, the self-sufficiency of a composite energy supply system is ensured, the green renewable energy is utilized to the maximum degree, and the dependence on the traditional energy is reduced. The central control system monitors the temperature values of different energy sources at the building heat source side, adjusts the heat supply production of each renewable energy source, effectively regulates and controls the heat source output (selects a proper temperature pipeline to change the heat supply source), and ensures the balance of the user heat and the heat source output. The result of the composite regulation and control means is that the feedback is rapid, the control is accurate, the error of artificial prediction and regulation is avoided, the heating of the building by multiple energy sources is realized, the phenomena of overheating and underheating of the building are effectively prevented, and the utilization efficiency of renewable energy sources is improved.
Description of the drawings:
FIG. 1 is a schematic diagram of the overall structure provided by one embodiment of the present invention;
in the figure: 1. a photovoltaic and photo-thermal integrated module, 2, a heat source side heat exchanger of a heat pump unit, 3, a heat collection water tank, 4, a storage battery pack, 5, a wind generating set, 6, a plate type heat exchanger, 7, an inverter, 8, a public power grid, 9, a living water tank, 10, a heat pump unit (including a soil source heat pump and a water source heat pump), 11, a building, 12, a central control system, 101, a first water pump, 102, a second water pump, 103, a third water pump, 104, a fourth water pump, 105, a fifth water pump, 106, a sixth water pump, 107, a seventh water pump, 203, 3, 204, 4, 205, 5, 209, 9, 210, 10, 301, 1, a flow control valve with temperature monitoring, 302, a second flow control valve with temperature monitoring, I-1, a flow monitoring instrument No. 1, I-2, a flow monitoring instrument No. 2, i-3 water temperature and flow monitoring instrument No. 3, I-4 water temperature and flow monitoring instrument No. 4, I-5 water temperature and flow monitoring instrument No. 5, M-4 indoor multifunctional monitoring instrument
FIG. 2 is a control schematic diagram of the central control system for intelligently adjusting the cold and heat sources;
in the figure: t, water temperature monitor, P, pressure transmission valve, M, water valve actuator (flow control valve with temperature and pressure monitoring)
Fig. 3 illustrates monitoring parameters for guaranteeing the balance between the heat source side and the user side in supply and demand, which can monitor the water temperature and pressure in the pipeline and transmit the data to the central control system, and the user side feeds back the room temperature, and the DCS system automatically determines whether the parameters meet the energy supply requirements to adjust the opening of the valve to control the water yield.
Fig. 4 is a flow chart of the embodiment of the system operating all year round, and details the operation mode in winter and summer and the matching use of various energy sources.
Detailed Description
The invention provides a distributed power supply credible capacity evaluation method based on a distribution network security domain, and the implementation process of the invention patent is further described in detail by combining with figure 1.
As described in the background art, the building is powered by using a single energy source, not only can the consumption be large, unclean energy sources such as similar coal and the like can cause serious air pollution, but also the characteristics of various renewable clean energy sources such as solar energy, wind energy, geothermal energy and the like are combined for use, so that the proportion of the renewable energy sources for powering the building is improved, the photovoltaic-photothermal integrated module and the wind generating set are used as a combined heat source, the heat accumulation problem in summer of a heat pump system is solved, the heat efficiency of the system is improved, the functions of self-generating, summer cooling, winter heating and all-year-round production of domestic hot water are realized, the temperature and the flow of each pipeline are accurately measured by an automatic monitoring and regulating and controlling means, and the uncertainty problems of a multi-energy source coupling complementary heat supply mode, the purpose, the matching degree, the energy utilization efficiency, the energy consumption level and the like are optimized through the unified regulation and control of a central control system, therefore, the intelligent heat supply capacity of the multi-energy coupling heat supply system is effectively improved.
As shown in fig. 1, a multiple energy source combined driven complex system, comprising: the method is characterized in that: the composite system comprises a heat supply unit, a water supply unit, a power generation unit and a centralized control module;
the heat supply unit consists of a photovoltaic and photo-thermal integrated mechanism, a heat collection water tank, a plate heat exchanger and a domestic water tank; the photovoltaic and photo-thermal integrated mechanism is connected with the terminal equipment 11 of the building sequentially through the heat collection water tank, the plate heat exchanger and the domestic water tank; wherein: the photovoltaic and photo-thermal integrated mechanism 1 is connected with the heat collection water tank through a first water temperature and flow monitoring instrument; the heat collecting water passes through a second water pump and the plate heat exchanger; the plate heat exchanger is connected with the domestic water tank through a fifth water pump, a second water temperature and flow monitor meter and a 10 th valve respectively; the other path of the domestic water tank is connected with the plate heat exchanger through a seventh water pump and a 3 rd valve, and the plate heat exchanger is connected with the photovoltaic-thermal integrated mechanism through a second water temperature and flow monitoring instrument, the heat collection water tank and the first water pump in sequence; the photovoltaic and photo-thermal integrated mechanism comprises a solar heat collector;
the photovoltaic and photo-thermal integrated mechanism 1 is connected with the heat collection water tank 3 and the plate heat exchanger 6 in sequence through pipelines, and the other side of the plate heat exchanger 6 is respectively connected with the domestic water tank 9 and the terminal equipment 11 of the building; the domestic water tank 9 comprises a water separator and a water collector.
As shown in fig. 1, the plate heat exchanger 6 is connected with the second water pump 102 to the heat collecting water tank 3 through a pipeline; the plate heat exchanger 6 is connected with a fifth water pump 105 through a pipeline to a water inlet pipeline of the building end equipment; the domestic water tank 9 is connected to the water inlet end of the plate heat exchanger 6 through a seventh water pump 107; the heat collecting water tank 3 is connected with the first water pump 101 through a pipeline to the water inlet end of the photovoltaic and photothermal integrated mechanism 1.
The water supply unit consists of a heat source side heat exchanger of a heat pump unit, the heat pump unit and a domestic water tank; the heat pump unit comprises a heat pump unit 10 and a heat pump unit, wherein the heat pump unit comprises an evaporator, a compressor, a condenser and an expansion valve which are connected in sequence; wherein: the water inlet pipeline and the water outlet pipeline of the photovoltaic and photothermal integrated mechanism 1 are both connected with the water outlet pipeline of the heat source side heat exchanger 2 of the heat pump unit; the water supply end of the heat exchanger at the heat source side of the heat pump unit is connected with the input end of the heat pump unit through a 9 th valve; the output end of the heat pump unit is connected with the output end of the heat pump unit through a fifth water temperature and flow monitoring instrument and a fourth water pump in sequence; the heat pump unit comprises a heat pump unit 10 and a heat pump unit control system, wherein the heat pump unit comprises an evaporator, a compressor, a condenser and an expansion valve which are connected in sequence; the heat pump unit 10 is selected from ground source heat pumps (including water source heat pumps and soil source heat pumps), and is provided with an evaporator and a condenser. Is respectively connected with the heat exchanger 2 and the domestic water tank 9 through pipelines.
Wherein:
one path of the water outlet end of the condenser is connected with a flow control valve 301 for temperature monitoring and a third water pump 103 through pipelines and then is connected with the terminal equipment 11 of the building, the water outlet end of the terminal equipment of the building is connected with a fifth valve 205 through a pipeline and then is connected with the water return end of the condenser; the other path of the water outlet end of the condenser is connected to the water inlet end of the domestic water tank water inlet end 9 through a sixth water pump, and the water outlet end of the domestic water tank 9 is connected to the water return end of the condenser through a pipeline.
The water outlet end of the evaporator is connected with the ninth valve 209 through a pipeline and then connected with the water inlet end of the heat source side heat exchanger of the heat pump unit, and the water outlet end of the heat source side heat exchanger of the heat pump unit is connected with the water return end of the evaporator of the heat pump unit after being connected with the fourth water pump through a pipeline.
The power generation unit consists of a photovoltaic and photo-thermal integrated mechanism, a storage battery pack 4, a wind generating set, an inverter 7 and a public power grid 8; wherein: the output end of the photovoltaic and photothermal integrated mechanism 1 is sequentially connected with a storage battery pack 4, an inverter 7 and the public power grid 8, and the storage battery pack 4 is further connected with a wind generating set 5.
As shown in fig. 2 and 3, the centralized control module controls the composite system through a wireless network:
the centralized control module can intelligently adjust energy supply to present the control principle of building energy supply cold and heat source side. The centralized control module adopts a DCS controller and a running mode that a working computer and a working instrument vertical disk coexist, and the operation regulation and control can be realized by the personnel in the main control room for centralized observation of the parameter display of the equipment.
The centralized control module is used for adjusting the opening size of the control valve to realize the regulation and control of the flow; the control of water supplement of the pipe network according to the temperature requirement is realized through setting upper and lower limits; the flow control and balance among a plurality of devices are realized through temperature monitoring; after reaching the set pipeline temperature threshold, automatically changing the circulating water branch source and other automatic control means, and the specific operation contents are as follows:
the centralized control module realizes heat supply of a building body: the DCS controller is connected with the photovoltaic and photo-thermal integrated unit to control the starting and stopping of the solar thermal collector, the heat of the solar thermal collector is stored by the heat collection water tank, and the middle of the pipeline is provided with a temperature monitoring point to monitor the heat collection temperature of the water tank. The DCS controller controls the loop through the water pump to realize temperature and pressure adjustment; meanwhile, the DCS controller is used for controlling the water path by arranging a water valve actuator in the middle of the collected high-temperature water connection plate type heat exchanger.
The DCS controller realizes the control of the plate heat exchanger by playing a role of a water separator through the three water pumps, and sequentially performs pipeline conversion according to the temperature, wherein the water supply temperature T g The temperature is higher than 40 ℃, and the photovoltaic and photo-thermal integrated unit is used for heating; when the temperature is less than 40 ℃ and T g The temperature is lower than 15 ℃, the photovoltaic and photo-thermal integrated unit is connected with a heat pump unit in series and simultaneously heats heating water; when T is g When the temperature is lower than 15 ℃, the heat pump unit is operated independently for heating, the DCS controller controls the distribution box to control the starting and stopping of the circulating pump, and the pressure sensor is connected in front of the heat pump unit to monitor the inlet pressure of the heat pump unit.
The centralized control module realizes power generation: the DSC controller controls the photovoltaic power generation amount of the photovoltaic and photo-thermal integrated unit, the power generation is transmitted to the storage battery for storage, the wind generating set is used for supplementing, the distribution box controls manual and automatic operation of the storage battery, and then the photovoltaic and photo-thermal integrated unit is transmitted to the inverter, the distribution box controls the power quota and supplies the power to the heat pump set for operation, redundant power can be merged into a public power grid, and if the power shortage condition occurs in the use process of the heat pump set, green power is purchased from the outside of the public power grid for supplementing.
The DCS controller adjusts the opening degree of connecting valves between water pipes of the water separator and the water collector after the automatic controller is operated according to the difference value of the measured water supply pressure and return water pressure and the set pressure, and the purpose of controlling the constant pressure difference between the water supply pressure and the return water pressure is achieved.
The temperature measured by the temperature sensor is fed back to the controller, the temperature difference of the water supply and return of the system pipeline is calculated, the cooling water pump is adjusted, and the lowest rotating speed is controlled at 70% to ensure enough lift.
The temperature measured by the temperature sensor is fed back to the controller, the temperature difference between the water supply and the water return of the water collector and the water distributor is calculated, the chilled water pump is adjusted according to the temperature difference between the water supply and the water return of the water collector and the water distributor, and the minimum flow of the unit is ensured.
And at the tail end of the composite system, the water temperature of a pipeline at the front end of building heating is kept within a threshold value so as to provide domestic water and heating in the building, if the temperature is lower than a set value, the valve is switched, the pipeline meeting the water temperature is used for providing hot water, and the parallax distance is used for judging whether a heat pump unit and a wind generating set need to be started to supply power to the heat pump unit and the wind generating set.
The operation sequence of each unit and the water pump of the system is automatically recorded through the DCS controller, the operation sequence is periodically alternated, the operation time of each unit is counted, the operation time is recorded and fed back to the central control room, an operator can manually adjust the output of various energy sources in the whole energy supply through the control system, and the purpose of jointly using various energy sources is achieved.
Set up indoor air monitor in the typical room of building, monitor indoor humiture, pollutant concentration isoparametric to real-time big screen or cell-phone APP are looked over, mismatch and the room temperature that leads to at energy supply end parameter under the not up to standard condition, through DSC controller regulation and control energy proportion, the concrete expression is in the regulation of water supply flow and temperature.
The external public power grid supplies power to the heat pump unit, except the generated energy of the photovoltaic and photothermal integrated module, the lacking part is supplemented by purchased green electricity, and the consumption of the new energy electric quantity can also enable the building to obtain corresponding green certification.
As shown in fig. 4, the utilization of solar energy by the composite system of the present invention comprises 4 sets of cycles:
T g for the water supply temperature, T, in the photovoltaic-thermal integrated unit 1 h Is the return water temperature in the photovoltaic and photothermal integrated unit 1.
(1) Photovoltaic light and heat integration module 1, heat storage water tank 3, plate heat exchanger 6, heat pump supply pipeline, building 11, return water pipeline, the heat supply operating mode promptly:
when water supply temperature T in photovoltaic and photo-thermal integrated module g The solar energy is utilized to directly supply heat at the temperature of more than 40 ℃, the flow control valve 302 with the temperature monitoring function and the third valve 203 are opened, the first water pump 101, the second water pump 102, the third water pump 103 and the fifth water pump 105 are opened, the heat pump unit 10 is closed, other valves and water pumps are closed, only the photovoltaic and photothermal integrated module 1 is used for heating hot water, and the solar energy is utilized to realize energy supply.
(2) Photovoltaic light and heat integration module 1, heat storage water tank 3, plate heat exchanger 6, heat pump supply line, heat pump set 10, building 11, return water pipeline, the heat supply operating mode promptly:
when the temperature is less than 40 ℃ and T g When the temperature is lower than 15 ℃, the solar system is connected with the heat pump unit in series, hot water heated by the photovoltaic and photothermal integrated module 1 enters the low-temperature heat source water inlet side of the heat pump unit, the third valve 203, the fourth valve 204, the flow control valve 206 with temperature monitoring and the ninth valve 209 are opened, all water pumps are opened, the heat pump unit is opened, and the rest valves are closed; the photovoltaic and photothermal integrated module 1 and the heat pump unit 10 heat hot water together.
When T is g When the temperature is lower than 15 ℃, the photovoltaic and photothermal integrated module 1 stops running, the heat pump unit is operated alone to supply heat,
and a fifth valve 205, a flow control valve 206 with temperature monitoring and a ninth valve 209 are opened, the third water pump 103 and the fourth water pump 104 are opened, the ground source heat pump unit 10 is opened, and the rest valves and the water pumps are closed.
(3) Photovoltaic light and heat integration unit 1, heat storage water tank 3, plate heat exchanger 6, heat pump supply pipeline, domestic water tank 9, return water pipeline, the hot water energy supply operating mode of living promptly:
the solar energy system and the heat pump unit supply life hot water all year round, solar energy is preferentially utilized under the condition of sufficient sunlight, and when the sun is in the mountain or in continuous rainy days, the heat pump unit is taken as the main part to realize the supply of the life hot water.
(4) Photovoltaic light and heat integration unit 1, heat pump set heat source side heat exchanger play water branch pipe, water pump, wet return, solar energy power supply operating mode promptly:
when the heat pump unit is operated alone in summer for refrigeration, the water outlet end of the evaporator of the heat pump unit flows through the heat exchanger 2 through the ninth valve 209 to release heat, and the heat accumulation phenomenon can be generated, so that the branch pipe flowing through the water outlet side of the heat exchanger 2 is connected to the solar photovoltaic panel in summer and at night, and the heat flowing into the heat source side in the daytime is transferred to the ambient air and the external environment through the solar photovoltaic panel in a radiation mode. The temperature at the heat source side is better recovered at night, and the operation efficiency of the heat pump unit at daytime is improved. Meanwhile, the photovoltaic and photothermal integrated unit converts a part of solar energy into high-quality electric energy to be stored in the storage battery pack 4, when the electric energy in the storage battery pack 4 is abundant, the rest electric energy is merged into a public power grid 8 through an inverter 7 to supply power to the heat pump unit 10, the consumption of the electric energy of the commercial power is reduced to the maximum extent, and meanwhile, the wind generating set is connected to the storage battery pack 4.
The central control system 12 is used for controlling the valves and the water pump, regulating and controlling the start and the stop of the photovoltaic and photothermal integrated module and the ground source heat pump unit, and is used for monitoring the temperature and proportioning the water supply flow.
The present invention is not limited to the above-described embodiments. The foregoing description of the specific embodiments is intended to describe and illustrate the technical solutions of the present invention, and the above specific embodiments are merely illustrative and not restrictive. Those skilled in the art can make various changes in form and details without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A multi-energy combined driving composite system comprises a heat supply unit, a water supply unit, a power generation unit and a centralized control module; the method is characterized in that:
the heat supply unit consists of a photovoltaic and photo-thermal integrated mechanism, a heat collection water tank, a plate type heat exchanger and a domestic water tank; the photovoltaic and photo-thermal integrated mechanism is connected with end equipment of a building sequentially through the heat collection water tank, the plate heat exchanger and the domestic water tank; wherein: the photovoltaic and photo-thermal integrated mechanism is connected with the heat collection water tank through a first water temperature and flow monitoring instrument; the heat collecting water is connected with the plate heat exchanger through a second water pump; the plate heat exchanger is connected with the domestic water tank through a fifth water pump, a fourth water temperature and flow monitor meter and a second valve respectively; the other path of the domestic water tank is connected with the plate heat exchanger through a seventh water pump and a 3 rd valve, and the plate heat exchanger is connected with the photovoltaic and photothermal integrated mechanism through a second water temperature and flow monitoring instrument, the heat collection water tank and the first water pump in sequence; the photovoltaic and photo-thermal integrated mechanism comprises a solar heat collector;
the water supply unit consists of a heat source side heat exchanger of a heat pump unit, the heat pump unit and a domestic water tank; the heat pump unit comprises an evaporator, a compressor, a condenser and an expansion valve which are connected in sequence; wherein: the water inlet pipeline and the water outlet pipeline of the photovoltaic and photo-thermal integrated mechanism are both connected with the water outlet pipeline of the heat source side heat exchanger of the heat pump unit; the water supply end of the heat exchanger on the heat source side of the heat pump unit is connected with the input end of the heat pump unit through a fourth water pump and a fifth water temperature and flow monitoring instrument in sequence; the output end of the heat pump unit is connected with the output end of the heat pump unit through a ninth valve in sequence; the heat pump unit comprises a heat pump unit 10 and a heat pump unit control system, wherein the heat pump unit comprises an evaporator, a compressor, a condenser and an expansion valve which are connected in sequence; wherein:
the high-temperature water at the water outlet end of the condenser exchanges heat with pipeline water connected with a heat pump unit, the pipeline water is connected with a flow control valve for temperature monitoring and a third water pump through pipelines and then is connected with end equipment of a building, the water outlet end of the end equipment of the building is connected with a fifth valve through a pipeline and then is connected with the water return end of the condenser for heat exchange; the other path of heat exchange process of the water outlet end of the condenser is connected to the water inlet end of the domestic water tank through a sixth water pump, and the water outlet end of the domestic water tank is connected to the water return end of the condenser through a pipeline; the water outlet end of the heat pump unit heat source side heat exchanger is connected with a fourth water pump through a pipeline and then is connected with the water return end of the heat pump unit evaporator;
the power generation unit consists of a photovoltaic and photo-thermal integrated mechanism, a storage battery pack, a wind generating set, an inverter and a public power grid; wherein: the output end of the photovoltaic photo-thermal integrated mechanism is sequentially connected with a storage battery pack, an inverter and the public power grid, and the storage battery pack is also connected with a wind generating set;
the centralized control module is composed of a DCS controller.
2. A multi-energy source combined drive complex system according to claim 1, wherein: the centralized control module realizes building heat supply:
the DCS controller is connected with the photovoltaic and photo-thermal integrated unit to control the starting and stopping of the solar thermal collector, the heat of the solar thermal collector is stored by the heat collection water tank, and the middle of the pipeline is provided with a temperature monitoring point to monitor the heat collection temperature of the water tank. The DCS controller controls the loop through the water pump to realize temperature and pressure adjustment; meanwhile, a DCS controller is used for connecting the collected high-temperature water with a water valve actuator in the middle of the plate heat exchanger to control a water path;
the DCS controller realizes the control of the plate heat exchanger by playing a role of a water separator through the three water pumps, and sequentially performs pipeline conversion according to the temperature, wherein the water supply temperature T g The temperature is higher than 40 ℃, and the photovoltaic and photo-thermal integrated unit is used for heating; when the temperature is less than 40 ℃ and T g The temperature is lower than 15 ℃, the photovoltaic and photo-thermal integrated unit is connected with a heat pump unit in series and simultaneously heats heating water; when T is g When the temperature is lower than 15 ℃, the heat pump unit is operated independently for heating, the DCS controller controls the distribution box to control the starting and stopping of the circulating pump, the pressure sensor is connected in front of the heat pump unit, and the inlet pressure of the heat pump unit is monitoredForce.
3. A multi-energy source combined drive complex system according to claim 1, wherein: the centralized control module realizes power generation: the DSC controller controls the photovoltaic power generation capacity of the photovoltaic and photothermal integrated unit, the power generation is transmitted to the storage battery for storage, the wind generating set is used for supplementing, the distribution box controls manual and automatic operation of the storage battery, and then the power is transmitted to the inverter, the distribution box controls the power quota to supply to the heat pump unit for operation, redundant power can be merged into a public power grid, and if the power shortage occurs in the use process of the heat pump unit, green electricity is purchased from the public power grid for supplementing.
4. The method for regulating and controlling the multi-energy combined driving composite system according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
the combined system supplies with pipeline, building, return water pipeline through photovoltaic light and heat integration unit, heat storage water tank, plate heat exchanger, heat pump, heat supply operating mode promptly:
when water supply temperature T in photovoltaic and photo-thermal integrated module g The solar energy is utilized to directly supply heat at the temperature higher than 40 ℃, the flow control valve with the temperature monitoring function and the third valve are opened, the first water pump, the second water pump, the third water pump and the fifth water pump are opened, the heat pump unit is closed, the rest valves and the water pumps are closed, only the photovoltaic and photothermal integrated module 1 is used for heating hot water, and the solar energy is utilized to realize energy supply.
When 40 ℃ is less than T g The solar energy system is connected with the heat pump unit in series at the temperature of less than 15 ℃, hot water heated by the photovoltaic and photothermal integrated unit enters the low-temperature heat source water inlet side of the heat pump unit, the third valve, the fourth valve, the flow control valve with temperature monitoring and the ninth valve are opened, all water pumps are opened, the heat pump unit is opened, and the rest valves are closed; the photovoltaic and photo-thermal integrated module and the heat pump unit heat hot water together.
When T is g When the temperature is lower than 15 ℃, the photovoltaic and photothermal integrated module stops running, the heat pump unit is operated independently for heating, and the fifth valve, the flow control valve 206 with temperature monitoring and the ninth valve are connectedThe valves are opened, the third water pump and the fourth water pump are opened, the ground source heat pump unit is opened, and the other valves and the water pumps are closed;
the combined system passes through photovoltaic light and heat integration unit, heat storage water tank, plate heat exchanger, heat pump supply pipeline, domestic water tank, return water pipeline, living hot water energy supply operating mode promptly: the solar energy system and the heat pump unit supply domestic hot water all year round, solar energy is preferentially utilized under the condition of sufficient sunlight, and when the sun is in the mountain or in continuous rainy days, the heat pump unit is taken as the main part to realize the supply of the domestic hot water;
the combined system passes through photovoltaic light and heat integration unit, heat pump set heat source side heat exchanger outlet branch pipe, water pump, wet return, solar energy power supply operating mode promptly:
when the heat pump unit is operated alone for refrigeration in summer, the water outlet end of the evaporator of the heat pump unit flows through the heat exchanger through the ninth valve to release heat, and a heat accumulation phenomenon can be generated, so that the branch pipe flowing through the water outlet side of the heat exchanger is connected to the solar photovoltaic panel in summer and at night, and heat flowing into the heat source side in the daytime is transferred to ambient air and the external environment through the solar photovoltaic panel in a radiation mode; the temperature of the heat source side is well recovered at night, when the operation efficiency of the heat pump unit in the daytime is improved, a part of solar energy is converted into high-quality electric energy by the photovoltaic and photothermal integrated unit and stored in the storage battery pack, when the electric energy in the storage battery pack is sufficient, the rest electric energy is merged into a public power grid through an inverter to supply power to the heat pump unit, the consumption of commercial power electric energy is reduced to the maximum degree, and meanwhile, the wind generating set is connected to the storage battery pack.
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| CN117490133A (en) * | 2023-12-29 | 2024-02-02 | 上海勘测设计研究院有限公司 | Heating control method and multi-energy complementary heating system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117490133A (en) * | 2023-12-29 | 2024-02-02 | 上海勘测设计研究院有限公司 | Heating control method and multi-energy complementary heating system |
| CN117490133B (en) * | 2023-12-29 | 2024-03-22 | 上海勘测设计研究院有限公司 | Heating control method and multi-energy complementary heating system |
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Application publication date: 20220923 |