CN113300387A - Green intelligent industrial park and industrial park comprehensive energy supply method - Google Patents
Green intelligent industrial park and industrial park comprehensive energy supply method Download PDFInfo
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- CN113300387A CN113300387A CN202110594821.2A CN202110594821A CN113300387A CN 113300387 A CN113300387 A CN 113300387A CN 202110594821 A CN202110594821 A CN 202110594821A CN 113300387 A CN113300387 A CN 113300387A
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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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
- H02J3/241—The oscillation concerning frequency
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
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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
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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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
- H02J3/466—Scheduling the operation of the generators, e.g. connecting or disconnecting generators to meet a given demand
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Abstract
The invention provides a comprehensive energy supply method for a green intelligent industrial park and an industrial park. This green wisdom industrial park's transformer substation is used for assembling the electric energy that changes by multiple energy and carries out the transformer processing that steps up to the electric energy to transmit electricity to the electric wire netting. This energy service system in green wisdom industry garden includes: the energy storage flow path and the energy release flow path of the liquid air energy storage unit are connected, the energy release flow path can exchange heat with a factory, and the energy storage flow path and the energy release flow path are respectively connected with a transformer substation; the battery unit is connected with a transformer substation; the heat absorption flow path of the cold and heat combined supply circulation unit can exchange heat with the energy storage flow path, and the heat release flow path of the cold and heat combined supply circulation unit can provide cold energy and heat energy for the user groups in the garden. This green wisdom industrial park can form effective suppression to the intermittent type nature and the volatility that arouse in the energy transmission process of electric wire netting to realize electric wire netting system's quick response and instantaneous frequency modulation, and can also satisfy the required cold and hot electricity trigeminy of industrial park and supply the demand.
Description
Technical Field
The invention relates to the technical field of energy conservation and environmental protection, in particular to a comprehensive energy supply method for a green intelligent industrial park and an industrial park.
Background
In order to reasonably control carbon emission, the coal-electricity ratio is gradually reduced in recent years, the large-scale development of renewable energy sources is imperative, a large amount of renewable energy sources are connected to a power grid to realize renewable energy source power generation, and great benefits can be generated on energy utilization, energy conservation and environmental protection. However, the volatility, intermittency and randomness of renewable energy power generation can bring great challenges to the normal operation of the power grid. Therefore, the power grid needs to be matched with an energy storage device to realize peak clipping and valley filling, and meanwhile, the power grid plays roles of power reserve and black start.
The comprehensive energy supply of high power consumption industrial park belongs to electric wire netting level application, but traditional comprehensive energy supply equipment is the gas trigeminy confession device in the industrial park, and the gas trigeminy confession device needs to consume fossil energy, will face gradually in the future and eliminate, and can't realize the storage of electric energy. At present, large-scale energy storage devices commonly used for grid-level applications are mainly pumped storage, battery storage and compressed air storage. However, both pumped-hydro energy storage and compressed air energy storage are dependent on specific geographical conditions; high capacity battery energy storage devices face serious challenges in terms of economy, safety, cycle life, and disposal of waste batteries.
Therefore, aiming at the industrial park with high energy consumption, how to realize effective inhibition of intermittence and fluctuation caused in the energy transmission process of the power grid, realize quick response and instantaneous frequency modulation of the power grid system, and meet the combined cooling, heating and power supply requirement required by the industrial park is a technical problem to be solved urgently at present.
Disclosure of Invention
The invention provides a green intelligent industrial park which is used for effectively inhibiting intermittence and fluctuation caused in the energy transmission process of a power grid, realizing quick response and instantaneous frequency modulation of a power grid system and meeting the combined cooling, heating and power supply requirement required by an industrial park.
The invention also provides a comprehensive energy supply method for the industrial park.
The invention provides a green intelligent industrial park which comprises a transformer substation, an energy service system factory and a power grid, wherein the power grid comprises a park user group and a factory which are respectively connected with the transformer substation, and the transformer substation is used for collecting electric energy converted from various energy sources and carrying out boosting transformation processing on the electric energy;
wherein the energy service system comprises:
the liquid air energy storage unit is provided with an energy storage flow path and an energy release flow path which are connected, the energy release flow path can exchange heat with the factory, and an energy input end of the energy storage flow path and an energy output end of the energy release flow path are respectively connected with the transformer substation;
the energy input end and the energy output end of the battery unit are respectively connected with the transformer substation;
cold and hot confession circulation unit is equipped with end to end's heat absorption flow path and exothermic flow path, the heat absorption flow path can with the energy storage flow path carries out the heat transfer, exothermic flow path can to the garden user group provides cold energy and heat energy.
According to the green intelligent industrial park, the transformer substation is respectively connected with the mains supply access end, the photovoltaic generator set and the wind generating set;
the power grid is in any time period, the wind generating set supplies power to the power grid through the transformer substation, and the battery unit is used for charging or discharging the transformer substation under the condition that the power supply of the wind generating set fluctuates;
the power grid is located at a power utilization valley section, the commercial power access end can supply power to the power grid through the transformer substation, the transformer substation can drive the energy storage flow path to operate, and the heat absorption flow path can absorb heat from the energy storage flow path in operation;
the power grid is located at a power consumption peak section, the photovoltaic generator set can supply power to the power grid through the transformer substation, the energy release flow path can transmit power to the transformer substation, and the heat release flow path can provide heat energy and cold energy for the park user group.
According to the green intelligent industrial park provided by the invention, the heat absorption flow path is connected with the first heat exchange side of the stage rear air cooler, and the second heat exchange side of the stage rear air cooler is connected with the energy storage flow path.
According to the green intelligent industrial park, the cold and heat combined supply circulation unit comprises a normal temperature tank and a high temperature tank, and a water outlet of the normal temperature tank, a first heat exchange side of the post-stage air cooler and a water inlet of the high temperature tank are sequentially connected through the heat absorption flow path.
According to the green intelligent industrial park, the cold and heat combined supply circulation unit further comprises an absorption type refrigerating unit and a hot water supply unit, a water outlet of the high-temperature tank, a first heat exchange side of the absorption type refrigerating unit, a first heat exchange side of the hot water supply unit and a water inlet of the normal-temperature tank are sequentially connected through the heat release flow path, and a second heat exchange side of the absorption type refrigerating unit and a second heat exchange side of the hot water supply unit are respectively connected to the park user group.
According to the green intelligent industrial park, the liquid air energy storage unit comprises an air compressor unit, an energy storage tank, a pre-stage preheater and an air turbine unit, the air compressor unit, the second heat exchange side of the post-stage air cooler and the inlet of the energy storage tank are connected through the energy storage flow path, and the outlet of the energy storage tank, the first heat exchange side of the pre-stage preheater and the air turbine unit are connected through the energy release flow path; the second heat exchange side of the pre-stage preheater is connected to the plant.
According to the green intelligent industrial park provided by the invention, the liquid air energy storage unit further comprises:
a first heat exchange side and a second heat exchange side of the compression heat utilization device are respectively connected to the energy storage flow path and the energy release flow path, a second heat exchange side of the post-stage air cooler is connected between the air compressor unit and the compression heat utilization device, and a first heat exchange side of the pre-stage preheater is connected between the compression heat utilization device and the air turbine unit;
a regenerator, a first heat exchange side of which is connected to the energy storage flow path between the compression heat utilization device and the energy storage tank, and a second heat exchange side of which is connected to the energy release flow path between the energy storage tank and the compression heat utilization device;
the throttling element is connected in the energy storage flow path between the first heat exchange side of the cold accumulator and the energy storage tank;
and the driving pump is connected in the energy release flow path between the energy storage tank and the second heat exchange side of the cold accumulator.
According to the green intelligent industrial park, the battery unit comprises at least one group of battery packs, and each group of battery packs is formed by connecting at least one stage of batteries in series and/or in parallel.
The invention also provides a comprehensive energy supply method for the industrial park, which is executed by the green intelligent industrial park; the industrial park comprehensive energy supply method comprises the following steps:
the power grid is in any time period, the substation collects electric energy converted from various energy sources and supplies power to the power grid, and the battery unit is driven to charge or discharge the substation under the condition that the power supply fluctuates;
the power grid is positioned at a power utilization valley section, the transformer substation drives the energy storage flow path of the liquid air energy storage unit to operate, and the heat absorption flow path of the combined cooling and heating circulation unit absorbs heat from the energy storage flow path in self-operation;
the power grid is located at a power peak section, the transformer substation supplies power to the power grid, the energy release flow path of the liquid air energy storage unit operates to transmit power to the transformer substation, and the heat release flow path of the combined cooling and heating circulation unit operates to provide heat energy and cold energy to the park user group.
According to the industrial park integrated energy supply method provided by the present invention, the industrial park integrated energy supply method further comprises:
when the power grid is in any time period, the wind generating set is started and supplies power to the power grid through the transformer substation, and the battery unit is used for charging or discharging the transformer substation under the condition that the power supply of the wind generating set fluctuates;
the power grid is positioned at a power utilization valley section, the photovoltaic generator set is closed, and the mains supply access end is started and supplies power to the power grid through the transformer substation;
and the power grid is positioned at a power consumption peak section, the commercial power access end is closed, and the photovoltaic generator set is started and supplies power to the power grid through the transformer substation.
The invention provides a green intelligent industrial park which comprises a transformer substation, an energy service system factory and a power grid, wherein the power grid comprises a park user group and a factory which are respectively connected with the transformer substation, and the transformer substation is used for collecting electric energy converted from various energy sources and carrying out boosting transformation processing on the electric energy so as to transmit the electric energy to the park user group and the factory of the power grid, thereby meeting the power consumption requirement of the park power grid. The energy service system comprises an associated liquid air energy storage unit, a battery unit and a combined cooling and heating circulation unit. Wherein: the liquid air energy storage unit is provided with an energy storage flow path and an energy release flow path which are connected, the energy release flow path can exchange heat with a factory, an energy input end of the energy storage flow path and an energy output end of the energy release flow path are respectively connected with a transformer substation, energy storage can be realized in a power utilization valley section of a power grid by using the liquid air energy storage unit, power transmission to the transformer substation is realized in a power utilization peak section of the power grid, and the power transmission capacity of the transformer substation to the power grid is further increased; the energy input end and the energy output end of the battery unit are respectively connected with the transformer substation, so that the transformer substation can be charged or discharged under the condition that the power supply of the transformer substation fluctuates, and the intermittent and fluctuating conditions caused by the power grid in the energy transmission process are effectively inhibited by utilizing the charging or discharging process of the battery unit; the combined cooling and heating supply circulating unit is provided with an end-to-end heat absorption flow path and a heat release flow path, the heat absorption flow path can exchange heat with the energy storage flow path, and the heat release flow path can provide cold energy and heat energy for a park user group, so that the combined cooling and heating supply requirement required by an industrial park can be met, and then the combined cooling and heating supply circulating unit is combined with power supply of a transformer substation to meet the combined cooling, heating and power supply requirement required by the industrial park.
In addition, the green intelligent industrial park can realize peak clipping, valley filling, quick response and instantaneous frequency modulation of power utilization of a power grid through the combination of the liquid air energy storage unit and the battery unit.
And, this green wisdom industry garden can integrate multiple energy and change the electric energy into, relies on commercial power and wind power generation at the power consumption valley section, relies on photovoltaic and wind power generation at the power consumption peak section to save commercial power supply volume, improve the power supply stationarity, and play energy-concerving and environment-protective effect.
The present invention also provides a method for supplying comprehensive energy for an industrial park, which is implemented by the aforementioned green intelligent industrial park, so that the method for supplying comprehensive energy for an industrial park has all the advantages of the aforementioned green intelligent industrial park, and will not be described herein again.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic view of a green intelligent industrial park according to the present invention.
Reference numerals:
100: a transformer substation; 200: an energy service system; 300: a campus user group;
400: a factory; 500: an energy input source; 510: a mains supply access end;
520: a photovoltaic generator set; 530: a wind generating set; 1: an air compressor unit;
2: a post-stage air cooler; 3: a regenerator; 4: a throttling element;
5: an energy storage tank; 6: driving the pump; 7: a pre-stage preheater;
8: an air turbine unit; 9: a normal temperature tank; 10: a normal temperature pump;
11: a high temperature tank; 12: a high temperature pump; 13: adjusting a valve;
14: an absorption chiller unit; 15: a hot water supply unit; 16: a battery pack;
17: an electric motor; 18: an electric generator.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The green intelligent industrial park according to the present invention (may be simply referred to as "industrial park" in the embodiment of the present invention) is described below with reference to fig. 1, and an industrial park integrated energy supply method based on the industrial park (may be simply referred to as "integrated energy supply method" in the embodiment of the present invention) is described.
As shown in fig. 1, the industrial park includes a substation 100, an energy service system 200 plant 400, and a power grid. Wherein the preferred grid comprises a campus user group 300 and a plant 400, which are connected to the substation 100, respectively. The energy input source 500 connected to the substation 100 includes various energy sources such as wind, light, and commercial power. The substation 100 can collect electric energy converted from various energy sources and perform a boosting transformation process on the electric energy so as to transmit electricity to the park user group 300 and the factory 400 of the power grid, thereby satisfying the power demand of the park power grid.
Specifically, the energy service system 200 of the industrial park includes an associated liquid air energy storage unit, a battery unit, and a combined cooling and heating cycle unit.
The liquid air energy storage unit is provided with an energy storage flow path and an energy release flow path which are connected, the energy release flow path can exchange heat with the factory 400, an energy input end of the energy storage flow path and an energy output end of the energy release flow path are respectively connected with the transformer substation 100, energy storage can be achieved in a power utilization valley section of a power grid through the liquid air energy storage unit, power transmission to the transformer substation 100 is achieved in a power utilization peak section of the power grid, and then power transmission capacity of the transformer substation 100 to the power grid is increased.
The energy input end and the energy output end of the battery unit are respectively connected with the transformer substation 100, so that the transformer substation 100 can be charged or discharged under the condition that the power supply of the transformer substation 100 fluctuates, and the intermittent and fluctuating conditions caused by the power grid in the energy transmission process are effectively inhibited by utilizing the charging or discharging process of the battery unit. Understandably, the charging process and the discharging process of the battery units can cause the power transmission in the substation 100 to generate frequency fluctuation, so that according to the specific fluctuation situation generated in the power transmission process, the charging process of the battery units is used for restraining and absorbing excessive power, or the discharging process of the battery units is used for making up the shortage of power, so as to achieve the effect of balancing the power fluctuation, and realize quick response and instantaneous frequency modulation in the power transmission process.
The cold and hot combined supply circulating unit is provided with an end-to-end heat absorption flow path and a heat release flow path, the heat absorption flow path can exchange heat with the energy storage flow path, and the heat release flow path can provide cold energy and heat energy for the garden user group 300, so that the cold and hot combined supply requirement required by an industrial park can be met.
Therefore, the industrial park completes the input of green energy sources of the park through the coordinated configuration of various energy sources, realizes effective inhibition on the intermittent and fluctuating conditions of energy supply through the configuration of the battery units, and realizes the quick response and instantaneous frequency modulation of a power grid of the park. The industrial park can also utilize the properties of a thermodynamic system of the liquid air energy storage unit, and in the electricity-electricity conversion process, the compressed heat stored in the energy storage stage of the liquid air is used for producing cold water of an air conditioner and hot water for life, so that the combined supply of cold, heat and electricity for the park user group 300 is realized, and the industrial waste heat of the factory 400 can be utilized for preheating the energy release stage of the liquid air energy storage unit, so that the power generation power is increased. The industrial park can also enable the whole system to become a set of intelligent comprehensive energy device through intelligent scheduling of cold, heat and electricity, and complete storage of electric energy and cascade utilization of energy.
In some embodiments, as shown in fig. 1, it is preferred that the battery unit include at least one battery pack 16. Each group of the battery packs 16 is composed of at least one stage of batteries connected in series and/or in parallel.
Understandably, the preferred battery is one of a lithium battery, a nickel-based battery, a flow battery, a lead-acid battery, and a sodium-sulfur battery.
It can be understood that the battery unit provided by the invention can be replaced by a super capacitor energy storage unit.
In some embodiments, the preferred substation 100 is connected to the utility power inlet 510, the photovoltaic power generator set 520, and the wind power generator set 530, respectively, so as to flexibly allocate utility power supply, photovoltaic power generation, and wind power generation according to the power consumption period of the power grid. Specifically, the method comprises the following steps: when the power grid is in any time period, the wind generating set 530 supplies power to the power grid through the substation 100, and the battery unit is used for charging or discharging the substation 100 under the condition that the power supply of the wind generating set 530 fluctuates, so that the power supply fluctuation caused by wind power fluctuation is reliably inhibited; the power grid is located at a power utilization valley section, the commercial power access end 510 can supply power to the power grid through the transformer substation 100 to make up for the deficiency of wind power generation capacity, the transformer substation 100 can drive the energy storage flow path to operate to realize a liquid air energy storage process, and the heat absorption flow path can absorb heat from the energy storage flow path in operation to realize a heat storage process of cold and heat combined supply circulation; the power grid is in the power consumption peak section, the photovoltaic generator set 520 can supply power to the power grid through the transformer substation 100 to make up for the deficiency of wind power generation capacity, the energy release flow path is started and can transmit power to the transformer substation 100 to cooperate with the photovoltaic generator set 520 to make up for the deficiency of the wind power generation capacity together, and therefore the power consumption requirement of the power grid in the power consumption peak section is met, meanwhile, the heat release flow path can provide heat energy and cold energy for the garden user group 300, and further combined supply of cold, heat and power of the garden user group 300 by the power consumption peak section is achieved together.
Understandably, the wind generating set 530 may be referred to simply as a wind generating set. The wind turbine 530 may preferably be a horizontal axis wind turbine or a vertical axis wind turbine depending on the structure.
In some embodiments, as shown in fig. 1, it is preferable to connect the after-stage air cooler 2 between the heat absorption flow path of the cogeneration cycle unit and the energy storage flow path of the liquid air energy storage unit. The first heat exchange side of the post-stage air cooler 2 is connected with the heat absorption flow path, and the second heat exchange side of the post-stage air cooler 2 is connected with the energy storage flow path. Preferably, the cooling and heating combined cycle unit includes a normal temperature tank 9 and a high temperature tank 11, and a water outlet of the normal temperature tank 9, a first heat exchange side of the after-stage air cooler 2, and a water inlet of the high temperature tank 11 are sequentially connected through a heat absorption flow path. In the after-stage air cooler 2, the normal-temperature pressurized water stored in the normal-temperature tank 9 sufficiently absorbs the high-temperature compression heat contained in the high-temperature and high-pressure air flowing through the energy storage flow path of the liquid air energy storage unit, thereby forming high-temperature pressurized water and storing the high-temperature pressurized water in the high-temperature tank 11.
In some embodiments, the combined cooling and heating cycle unit further includes an absorption chiller unit 14 and a hot water supply unit 15. The water outlet of the high-temperature tank 11, the first heat exchange side of the absorption refrigeration unit 14, the first heat exchange side of the hot water supply unit 15, and the water inlet of the normal-temperature tank 9 are connected in sequence through a heat release flow path. The second heat exchange side of the absorption chiller unit 14 and the second heat exchange side of the hot water supply unit 15 are connected to the campus user group 300, respectively. In the process that the high-temperature pressurized water flows along the heat release flow path, the pioneer dynamic absorption type refrigerating unit 14 produces air conditioner cold water to cool the garden user group 300, and the cooled pressurized water further supplies domestic hot water or winter heating hot water to the garden user group 300 through the hot water supply unit 15.
It is understood that the room temperature pump 10 is preferably attached to the endothermic flow path in order to reliably drive the endothermic flow path. Further preferably, as shown in fig. 1, the normal-temperature pump 10 is installed in the heat absorption flow path between the normal-temperature tank 9 and the second heat exchange side of the after-stage air cooler 2.
It is understood that the heat release flow path is preferably provided with a high-temperature pump 12 for reliably driving the heat release flow path. The high temperature pump 12 is made of a high temperature resistant material. In order to flexibly and reliably control the water flow rate and the flow speed in the heat release flow path, it is preferable that the heat release flow path is provided with a control valve 13. More preferably, as shown in fig. 1, the high-temperature pump 12 and the regulator valve 13 are connected in this order to a heat radiation flow path between the high-temperature pump 12 and the absorption refrigeration unit 14.
It will be appreciated that the heat storage medium in the combined cooling and heating cycle unit may be replaced by thermal oil or other heat transfer fluid.
It will be appreciated that the after-stage air cooler 2 is preferably of a heat exchanger construction, such as a shell and tube heat exchanger or a plate and shell heat exchanger. Alternatively, the after-stage air cooler 2 may have a packed bed structure.
It will be appreciated that the regulating valve 13 is preferably a pneumatic or electric valve.
It will be appreciated that the absorption chiller unit 14 is preferably a lithium bromide unit or an ammonia unit.
It is understood that the hot water supply unit 15 may directly or indirectly supply domestic hot water or winter heating water to the respective buildings of the campus user group 300.
In some embodiments, the liquid air energy storage unit includes an air compressor package 1, an energy storage tank 5, a pre-stage preheater 7, and an air turbine package 8. The energy input end of the air compressor unit 1 is provided with an electric motor 17, and the electric motor 17 is connected with the transformer substation 100. When the transformer substation 100 inputs electric energy to the motor 17, the motor 17 can be driven to operate, and then the air compressor unit 1 is driven to operate.
On the one hand, the air compressor unit 1, the second heat exchange side of the post-stage air cooler 2 and the inlet of the energy storage tank 5 are connected through an energy storage flow path, so that air entering the air compressor unit 1 is compressed, high-temperature compressed air is formed, flows through the post-stage air cooler 2 in the energy storage flow path and exchanges heat with the heat absorption flow path of the cold and heat combined supply circulation unit to cool, then is converted into liquid air in the energy storage flow path and is stored in the energy storage tank 5, and the energy storage stage of the liquid air energy storage unit is achieved and completed.
On the other hand, the outlet of the energy storage tank 5, the first heat exchange side of the pre-stage preheater 7, and the air turbine unit 8 are connected by a release flow path, and the second heat exchange side of the pre-stage preheater 7 is connected to the factory 400, thereby realizing the release stage of the liquid air energy storage unit. The method specifically comprises the following steps: the liquid air flows through the energy release flow path from the energy storage tank 5 and is gradually heated and pressurized to form high-temperature and high-pressure air; before entering the air turbine set 8, the heat is exchanged between the pre-stage preheater 7 and the industrial waste heat from the factory 400 to further raise the temperature, and then the heat enters the air turbine set 8 to do work, so that the air turbine set 8 is used for driving the generator 18 to generate power. The generator 18 is connected to the substation 100, so that the electric power generated in the energy release phase of the liquid air energy storage unit is incorporated into the substation 100, and grid connection is realized.
In some embodiments, the liquid air energy storage unit further comprises a compression heat utilization device, a regenerator 3, a throttling element 4 and a drive pump 6. The first heat exchange side and the second heat exchange side of the compression heat utilization device are respectively connected to the energy storage flow path and the energy release flow path. The second heat transfer side of air cooler 2 behind the stage is connected between air compressor unit 1 and the compression heat utilization device to carry out the recooling to the high temperature high-pressure air who leaves air compressor unit 1, and make full use of high temperature compression heat makes the heat accumulation medium pressurized water among the cold and hot confession circulation unit warm up, and the compression heat is retrieved and recycled to the high efficiency. The first heat exchange side of the pre-stage preheater 7 is connected between the compression heat utilization device and the air turbine unit 8, so that high-temperature and high-pressure air before entering the air turbine unit 8 can be preheated by using industrial waste heat, and the work efficiency of the air turbine unit 8 is further improved. The first heat exchange side of the regenerator 3 is connected in the energy storage flow path between the compression heat utilization device and the energy storage tank 5, the second heat exchange side of the regenerator 3 is connected in the energy release flow path between the energy storage tank 5 and the compression heat utilization device, and the cold energy of the liquid air flowing through the regenerator 3 in the energy release stage of the liquid air energy storage unit can be retained by the regenerator 3, so that the normal-temperature and high-pressure air flowing through the regenerator 3 in the energy storage stage of the liquid air energy storage unit is cooled. The throttling element 4 is connected in an energy storage flow path between the first heat exchange side of the regenerator 3 and the energy storage tank 5, and the throttling element 4 can perform pressure reduction expansion on the cooled low-temperature high-pressure air in the energy storage stage so as to convert the air into liquid air. The driving pump 6 is connected in the energy release flow path between the energy storage tank 5 and the second heat exchange side of the regenerator 3, the driving pump 6 can respond in time according to the real-time signal of the power grid power consumption period in the garden, so that the start and stop of the energy release stage of the liquid air energy storage unit are realized, the energy release flow path of the liquid air energy storage unit is started in time when the power grid enters the power consumption peak section, and the liquid air in the energy storage tank 5 enters the regenerator 3 under the supercharging effect of the driving pump 6.
It will be appreciated that the pre-stage preheater 7 is preferably of heat exchanger construction, such as a shell and tube heat exchanger or a plate and shell heat exchanger. Alternatively, the pre-stage preheater 7 may be of a packed bed configuration.
It will be appreciated that the preferred configuration of the air compressor package 1 is piston, screw or centrifugal. Preferably, the air compressor package 1 comprises one or more compressors. The air compressor units 1 are formed by series connection, parallel connection or series-parallel connection integration. Each stage of the compressor may be followed by a compression heat utilizing device.
It will be appreciated that the preferred design of the air turbine unit 8 is preferably radial, axial or radial-axial. Preferably, air turbine set 8 includes one or more turbines that are integrated in series, parallel, or both to form air turbine set 8. Preferably, a preheater is provided before each stage of the turbine. Preferably, the preheater is in one or more of a shell-and-tube structure, a plate-fin structure and a wound tube structure.
Understandably, it is preferable that the regenerator 3 employs one or a combination of more of a liquid phase regenerator 3, a solid phase regenerator 3, or a phase change material regenerator 3. The cold storage medium of the liquid phase regenerator 3 is preferably at least one of methanol, propane and R123. The cold storage medium of the solid phase regenerator 3 is preferably at least one of metal, rock and glass. Preferably, in the cold accumulator 3, the liquid or gaseous air is in direct or indirect contact heat exchange with the cold accumulation medium. Preferably, the cold accumulator 3 comprises one-stage or multi-stage cold accumulators, and each stage of cold accumulator is formed by connecting in series, in parallel or in series-parallel combination.
It will be appreciated that the throttling element 4 is preferably a cryogenic expander or throttle.
It will be appreciated that the preferred energy storage tank 5 is a dewar or cryogenic storage tank.
It will be appreciated that the pump body structure of the drive pump 6 is preferably of the piston or centrifugal type.
The comprehensive energy supply method provided by the invention is executed by the green intelligent industrial park, so that the comprehensive energy supply method has all the advantages of the industrial park, and the advantages of the method are not described in detail herein.
In the comprehensive energy supply method, the whole power grid in the park is divided into a power utilization level section, a power utilization valley section and a power utilization peak section according to the power utilization load and the power utilization time period. The average level range is obtained by comprehensively evaluating actual power utilization load data such as the integral power utilization load of a user at the location of the power grid, the annual average power utilization load, the monthly average power utilization load, the daily average power utilization load and the like. The electricity valley section refers to a stage that the power grid is in a state that the electricity load is lower than the average level range, such as night. The peak power consumption section refers to a stage that the power grid is in a range that the power consumption load is higher than the average level, such as daytime.
In the integrated energy supply method, the power grid is in any time period, and the substation 100 collects electric energy converted from various energy sources and supplies the electric energy to the power grid. The battery unit is driven to charge or discharge the substation 100 in the event of a fluctuation in the power supply. Preferably, during this period, the wind turbine 530 is activated and supplies power to the grid through the substation 100, and the battery unit is used for charging or discharging the substation 100 in case of fluctuation of the power supply of the wind turbine 530, so as to suppress intermittent and fluctuating situations in the power supply process caused by wind fluctuation.
In the comprehensive energy supply method, a power grid is located in a power utilization valley section, the substation 100 drives an energy storage flow path of the liquid air energy storage unit to operate, and a heat absorption flow path of the cold and hot combined supply circulation unit absorbs heat from the energy storage flow path in operation. Preferably, during this period, the photovoltaic generator set 520 is turned off, and the utility power inlet 510 is turned on and supplies power to the grid through the substation 100.
Specifically, as shown in fig. 1, the power grid is located in the power consumption valley section, the photovoltaic generator set 520 is turned off, and the wind turbine generator set 530 works normally. The electricity generated by the wind turbine 530 is boosted by the substation 100 and then enters the grid of the campus, so as to be supplied to each building of the campus user group 300 and each plant, office area and living area of the factory 400. Meanwhile, the energy output end of the battery unit is connected with the substation 100, and the battery unit charges or discharges the substation 100 when wind power fluctuates, so that fluctuation of the park power grid is reduced. The surplus power consumption of the park grid is partially supplied by the utility power, i.e. the utility power incoming end 510 is ensured to be communicated with the substation 100 for power supplement.
Meanwhile, the energy storage flow path of the liquid air energy storage unit works normally. The method specifically comprises the following steps: the commercial power inputs electric energy through the transformer substation 100, can start the air compressor unit 1 and compress normal atmospheric temperature air to high temperature high pressure, and high temperature high pressure air flows through the after-stage air cooler 2 in the energy storage flow path, and the after-stage air cooler 2 transmits the high temperature compression heat to the heat accumulation medium pressurized water in the heat absorption flow path of the cold and hot combined supply circulation unit. Then: on one hand, in an energy storage flow path of the liquid air energy storage unit, high-pressure air cooled to normal temperature enters a first heat exchange side of a cold accumulator 3 from an air cooler 2 after being subjected to self-grading and is cooled to low temperature, and then forms liquid air after being subjected to pressure reduction and expansion effects of a throttling element 4 and is stored in an energy storage tank 5, so that the energy storage process of the liquid air energy storage unit is completed; on the other hand, in the heat absorption flow path of the combined cooling and heating cycle unit, pressurized water in the normal temperature tank 9 is driven by the normal temperature pump 10 to enter the after-stage air cooler 2 to absorb the compression heat, and then the temperature is raised, and the pressurized water is stored in the high temperature tank 11.
In the comprehensive energy supply method, the power grid is in the peak power consumption stage, and the substation 100 supplies power to the power grid. The discharge flow path of the liquid air energy storage unit operates to deliver power to the substation 100. The heat release flow path of the cogeneration cycle unit operates to provide both heat and cold energy to the campus user groups 300. Preferably, during this period, the mains inlet 510 is closed, and the photovoltaic generator set 520 is activated and supplies power to the grid through the substation 100.
Specifically, as shown in fig. 1, the power grid is in a peak power consumption section, and the commercial power is not supplied with power. The photovoltaic generator set 520 and the wind turbine generator set 530 both work normally, and the generated electricity enters the park power grid after being boosted by the transformer substation 100 and is supplied to each building of the park user group 300 and each factory building, office area and living area of the factory 400 for use. Meanwhile, the energy output end of the battery unit is connected to the substation 100, and when wind power and illumination generate large fluctuation, the battery realizes quick response and instantaneous frequency modulation through charging or discharging so as to reduce the fluctuation of the power grid of the park.
Meanwhile, the energy release flow path of the liquid air energy storage unit works normally. The method specifically comprises the following steps: the driving pump 6 is started, liquid air in the energy storage tank 5 enters the second heat exchange side of the cold accumulator 3 after being pressurized by the driving pump 6, and cold energy is stored in the cold accumulator 3; the high-pressure air after being reheated enters the second heat exchange side of the pre-stage preheater 7, is heated by a medium with industrial waste heat flowing through the first heat exchange side of the pre-stage preheater 7, enters the air turbine unit 8 to perform expansion work, and then drives the generator 18 to generate power and output electric energy to the transformer substation 100 for grid connection.
Meanwhile, in the heat absorption flow path of the combined cooling and heating cycle unit, the pressurized water in the high-temperature tank 11 is driven into the heat release flow path by the high-temperature pump. After the high-temperature pressurized water is regulated and controlled by the regulating valve 13, the pioneer dynamic absorption type refrigerating unit 14 produces air-conditioning cold water to cool the garden user group 300, and the cooled pressurized water further supplies domestic hot water or winter heating hot water to the garden user group 300 through the hot water supply unit 15.
Understandably, the heat release flow path of the combined cooling and heating circulation unit can be started to realize all-weather supply in the garden by adjusting the flow rate, and the heat release flow path does not need to be matched with the electricity utilization period.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A green intelligent industrial park is characterized by comprising a transformer substation, an energy service system factory and a power grid, wherein the power grid comprises a park user group and a factory which are respectively connected with the transformer substation, and the transformer substation is used for collecting electric energy converted from various energy sources and carrying out boosting transformation processing on the electric energy;
wherein the energy service system comprises:
the liquid air energy storage unit is provided with an energy storage flow path and an energy release flow path which are connected, the energy release flow path can exchange heat with the factory, and an energy input end of the energy storage flow path and an energy output end of the energy release flow path are respectively connected with the transformer substation;
the energy input end and the energy output end of the battery unit are respectively connected with the transformer substation;
cold and hot confession circulation unit is equipped with end to end's heat absorption flow path and exothermic flow path, the heat absorption flow path can with the energy storage flow path carries out the heat transfer, exothermic flow path can to the garden user group provides cold energy and heat energy.
2. The green intelligent industrial park according to claim 1, wherein the substation is connected with a mains supply access terminal, a photovoltaic generator set and a wind turbine generator set respectively;
the power grid is in any time period, the wind generating set supplies power to the power grid through the transformer substation, and the battery unit is used for charging or discharging the transformer substation under the condition that the power supply of the wind generating set fluctuates;
the power grid is located at a power utilization valley section, the commercial power access end can supply power to the power grid through the transformer substation, the transformer substation can drive the energy storage flow path to operate, and the heat absorption flow path can absorb heat from the energy storage flow path in operation;
the power grid is located at a power consumption peak section, the photovoltaic generator set can supply power to the power grid through the transformer substation, the energy release flow path can transmit power to the transformer substation, and the heat release flow path can provide heat energy and cold energy for the park user group.
3. The green intelligent industrial park of claim 2, wherein the heat absorption flow path connects a first heat exchange side of a post-stage air cooler, and a second heat exchange side of the post-stage air cooler connects to the energy storage flow path.
4. The green intelligent industrial park as claimed in claim 3, wherein the combined cooling and heating circulation unit comprises a normal temperature tank and a high temperature tank, and a water outlet of the normal temperature tank, a first heat exchange side of the after-stage air cooler, and a water inlet of the high temperature tank are sequentially connected through the heat absorption flow path.
5. The green intelligent industrial park as claimed in claim 4, wherein the combined cooling and heating cycle unit further comprises an absorption chiller and a hot water supply unit, the water outlet of the high temperature tank, the first heat exchange side of the absorption chiller, the first heat exchange side of the hot water supply unit, and the water inlet of the normal temperature tank are sequentially connected through the heat release flow path, and the second heat exchange side of the absorption chiller and the second heat exchange side of the hot water supply unit are respectively connected to the park user group.
6. The green intelligent industrial park according to claim 3, wherein the liquid air energy storage unit comprises an air compressor unit, an energy storage tank, a pre-stage preheater and an air turbine unit, the air compressor unit, the second heat exchange side of the post-stage air cooler and the inlet of the energy storage tank are connected through the energy storage flow path, and the outlet of the energy storage tank, the first heat exchange side of the pre-stage preheater and the air turbine unit are connected through the energy release flow path; the second heat exchange side of the pre-stage preheater is connected to the plant.
7. The green intelligent industrial park of claim 6, wherein the liquid air energy storage unit further comprises:
a first heat exchange side and a second heat exchange side of the compression heat utilization device are respectively connected to the energy storage flow path and the energy release flow path, a second heat exchange side of the post-stage air cooler is connected between the air compressor unit and the compression heat utilization device, and a first heat exchange side of the pre-stage preheater is connected between the compression heat utilization device and the air turbine unit;
a regenerator, a first heat exchange side of which is connected to the energy storage flow path between the compression heat utilization device and the energy storage tank, and a second heat exchange side of which is connected to the energy release flow path between the energy storage tank and the compression heat utilization device;
the throttling element is connected in the energy storage flow path between the first heat exchange side of the cold accumulator and the energy storage tank;
and the driving pump is connected in the energy release flow path between the energy storage tank and the second heat exchange side of the cold accumulator.
8. The green intelligent industrial park as claimed in any one of claims 1 to 7, wherein the battery unit comprises at least one battery pack, each battery pack is composed of at least one stage of batteries connected in series and/or parallel.
9. An industrial park integrated energy supply method, characterized by being performed by the green intelligent industrial park according to any one of claims 1 to 8; the industrial park comprehensive energy supply method comprises the following steps:
the power grid is in any time period, the substation collects electric energy converted from various energy sources and supplies power to the power grid, and the battery unit is driven to charge or discharge the substation under the condition that the power supply fluctuates;
the power grid is positioned at a power utilization valley section, the transformer substation drives the energy storage flow path of the liquid air energy storage unit to operate, and the heat absorption flow path of the combined cooling and heating circulation unit absorbs heat from the energy storage flow path in self-operation;
the power grid is located at a power peak section, the transformer substation supplies power to the power grid, the energy release flow path of the liquid air energy storage unit operates to transmit power to the transformer substation, and the heat release flow path of the combined cooling and heating circulation unit operates to provide heat energy and cold energy to the park user group.
10. The industrial park integrated energy supply method according to claim 9, further comprising:
when the power grid is in any time period, the wind generating set is started and supplies power to the power grid through the transformer substation, and the battery unit is used for charging or discharging the transformer substation under the condition that the power supply of the wind generating set fluctuates;
the power grid is positioned at a power utilization valley section, the photovoltaic generator set is closed, and the mains supply access end is started and supplies power to the power grid through the transformer substation;
and the power grid is positioned at a power consumption peak section, the commercial power access end is closed, and the photovoltaic generator set is started and supplies power to the power grid through the transformer substation.
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