Light-storage direct-flexible integrated zero-carbon steam production system and method based on winery park

Abstract

The invention discloses a light-storage direct-flexible integrated zero-carbon steam production system and method based on a winery park. The light-storage direct-flexible integrated zero-carbon steam production system comprises an electric power system, a solar heat collection system, an electrified steam production system and a supplementary heat source steam supply system. The electrified steam generating system is used for generating steam; the solar heat collection system is used for generating steam through solar heat collection. A photovoltaic system, an energy storage system, a charging system, a direct-current micro-grid system, a flexible power utilization system and a solar steam system are combined together, and a power utilization balance time-phased operation method and a steam balance time-phased operation method are matched with each other, so that the light-storage direct-flexible integrated zero-carbon steam system based on the winery park is formed. An independent direct-current micro-grid, an energy micro-grid in which energy storage (electricity storage and heat storage) and clean energy are mutually coupled are formed, electric and heat collaborative supply is realized, and self-regulation and flexible response of an energy utilization system are realized, so that integration of production, supply and elimination is formed.

Description

Technical Field

[0001] This invention relates to the field of new energy system technology, specifically to a zero-carbon steam generation system based on a photovoltaic-storage-direct-flexible integrated system in a winery industrial park. Background Technology

[0002] The brewing process in a winery, including processes such as cooking, sterilization, fermentation, distillation, cleaning, drying, heating, and cooling, requires a stable and efficient steam supply. Steam, compared to hot water, is a higher-grade form of thermal energy, and the energy consumed in supplying steam constitutes a significant portion of a winery's energy consumption. Therefore, effectively reducing energy and resource consumption during production is crucial for lowering production costs, improving economic efficiency and product market competitiveness, and reducing carbon emissions. The brewing process also requires precise control of steam parameters. Advanced system operation and control methods can ensure stable production and product quality, while also improving energy efficiency and reducing energy costs.

[0003] Among the published patents are "Chinese invention patent CN110513913A, a heat pump heat recovery efficiency-enhancing and energy-saving production system for traditional solid-state liquor", "invention patent CN202510511353.6, a photovoltaic-storage-direct-flexible intelligent control system", and "Chinese utility model patent CN222317754U, a waste heat recovery device for wineries", which recover the waste heat of steam emitted during the brewing process without condensation. Among them, the technologies of using heat pumps to recover waste heat and then flash-evaporating it to produce steam (the power source for the heat pumps is the municipal power grid) and the technology of combining waste heat from boiler flue gas with waste heat in a cascade heat recovery process (the heat recovery medium is water, which is recovered through multi-stage indirect heat exchangers to recover waste heat from flue gas and production process, and finally returned to the boiler water supply pipe) have achieved energy saving and consumption reduction to a certain extent and improved energy utilization efficiency. However, they have not achieved the replacement of traditional energy sources and have not solved the problems of large carbon emissions and high total primary energy consumption caused by non-renewable energy heating.

[0004] Water source heat pumps combined with thermal storage steam generation systems and electric boiler heating technology replace traditional fossil fuel combustion to produce industrial steam through electrification. However, like the heat pumps used for waste heat recovery in the publicly disclosed patented technologies mentioned above, water source heat pumps and electric boilers mainly rely on the municipal power grid for electricity. On the one hand, this does not solve the problem of high electricity costs; on the other hand, thermal power remains the main energy source in the municipal power grid, still generating a large amount of indirect carbon emissions. How to fundamentally increase the proportion of low-carbon and zero-carbon energy consumption and reduce carbon emissions has become an urgent problem to be solved in industrial steam supply.

[0005] As a renewable energy alternative, a single solar steam system is unstable and still requires other stable heat sources as a backup. Therefore, it cannot completely get rid of the problems of high energy consumption, high carbon emissions, high cost and poor flexibility, and it is difficult to become the optimal choice for steam supply. The industry still needs to seek feasible, reliable and flexibly responsive renewable energy heating technologies to help achieve energy conservation and carbon reduction.

[0006] In industrial parks, solar energy is mainly used in the form of photovoltaic power generation, typically for self-consumption to replace part of the electricity consumption, with surplus electricity fed into the grid. While there are independent solar steam systems in the industrial sector, photovoltaic power generation and solar steam systems still exist as separate entities and independent systems. A synergistic integrated supply system of solar power and heat has not yet been achieved, especially in conjunction with production. There are currently no relevant demonstrations in the industry regarding industrial steam supply.

[0007] Against this backdrop, this invention proposes an integrated zero-carbon steam generation system based on a winery industrial park that combines photovoltaic, energy storage, direct current, and flexible energy sources. This system forms an independent DC microgrid, an energy microgrid that couples energy storage (electricity and heat storage) with clean energy, enabling coordinated power and heat supply, and achieving self-regulation and flexible response of the energy system, thus forming an integrated production, supply, and consumption system. Summary of the Invention

[0008] The purpose of this invention is to provide a zero-carbon steam generation system based on a photovoltaic-storage-DC-flexible integrated system in a winery park. This system combines photovoltaic, energy storage, charging, DC microgrid, flexible electricity consumption, and solar steam system, and integrates power consumption balancing time-of-use operation methods and steam balancing time-of-use operation methods to form a zero-carbon steam generation system based on a photovoltaic-storage-DC-flexible integrated system in a winery park. This system forms an energy microgrid that couples an independent DC microgrid, energy storage (electricity storage, heat storage), and clean energy, achieving coordinated power and heat supply, self-regulation and flexible response of the energy system, and thus forming an integrated production, supply, and consumption system.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a zero-carbon steam generation system based on integrated photovoltaic-storage-direct-flexible steam generation in a winery industrial park, comprising an electric power system, a solar thermal collector system, an electrified steam generation system, a supplementary heat source steam supply system, and an industrial production steam supply device; the electric power system supplies power to the electrified steam generation system; the electrified steam generation system generates steam; the solar thermal collector system generates steam using solar energy; the supplementary heat source steam supply system provides supplementary steam; and the industrial production steam supply device utilizes the steam from winemaking.

[0010] The power system includes a photovoltaic power generation unit, an energy storage unit, and a microgrid transmission and distribution unit;

[0011] The electrified steam generation system includes a high-temperature water source heat pump, an air source heat pump, a first flash tank, a second flash tank, and an electric steam boiler. The high-temperature water source heat pump is used to recover waste heat resources, heat them to a high temperature, and output them to the first flash tank. The first flash tank is used to generate steam using the high-temperature heat resources of the high-temperature water source heat pump. The air source heat pump is used to heat air and output it to the second flash tank. The second flash tank is used to generate steam using the hot air from the air source heat pump. The electric steam boiler is used to directly generate steam after being powered on.

[0012] When photovoltaic power generation is below 30% of its peak value, power is supplied by energy storage units and / or microgrid transmission and distribution units, with electrified steam generation systems and supplementary heat sources providing steam to each other. When photovoltaic power generation is between 30% and 50% of its peak value, power is supplied by photovoltaic power generation units, energy storage units, and / or microgrid transmission and distribution units, with electrified steam generation systems, solar thermal collection systems, and supplementary heat sources providing steam to each other. When photovoltaic power generation is between 50% and 100% of its peak value, power is supplied by photovoltaic power generation units, with electrified steam generation systems and solar thermal collection systems providing steam, and steam is stored in the energy storage unit.

[0013] More preferably, the solar thermal system includes a solar collector and a thermal storage unit. The solar collector is used to generate steam by collecting solar energy and transfer the steam to the thermal storage unit. The thermal storage unit is used to store the steam generated by the electrified steam generation system and the steam generated by the solar collector, and output it to the industrial production steam supply device.

[0014] More preferably, the power system includes at least power consumption units, other AC / DC power consumption, DC charging piles, and heating and cooling system equipment.

[0015] More preferably, the photovoltaic power generation unit includes a photovoltaic module; the photovoltaic module is used to convert solar energy into electrical energy and then into direct current through a DC / DC converter, which is then directly connected to the DC bus.

[0016] More preferably, the microgrid power transmission and distribution unit includes a municipal power grid, which charges the DC bus through a transformer, and the other DC electrical equipment that uses AC or DC power is directly powered by the DC bus.

[0017] More preferably, the energy storage unit includes an energy storage power station; the energy storage power station is used to connect to a DC bus via a bidirectional DC / DC controller, store excess electrical energy, and release electrical energy to supply power when there is insufficient sunlight.

[0018] More preferably, the high-temperature water source heat pump, air source heat pump, and electric steam boiler are connected to the AC bus via a DC / AC inverter and powered by the AC bus.

[0019] This invention also provides a method for time-of-use operation of a photovoltaic-storage-direct-flexible integrated zero-carbon steam generation system applied to a winery industrial park, comprising:

[0020] 1) When photovoltaic power generation is below 30% of its peak value, the power supply is provided by the energy storage power station. The power supply priority order is: electrified steam system, industrial production steam supply device, and other AC / DC power consumption.

[0021] 2) When photovoltaic power generation rises to 30%-50% of its peak, power supply will be primarily provided by photovoltaic power generation units, supplemented by energy storage power stations or municipal power grid supply.

[0022] 3) When the photovoltaic power generation is at 50-100% peak, the photovoltaic power generation unit supplies power, and the winery's electrical equipment operates centrally to charge the energy storage station to full capacity;

[0023] 4) When photovoltaic power generation drops to 50%-30% of its peak value, the photovoltaic power generation unit supplies power to the electrified steam system and the core equipment of the winery, and switches the air source heat pump to a low power consumption mode to supplement power supply through the energy storage station.

[0024] This invention also provides a method for time-sharing steam balance operation of a zero-carbon steam generation system based on a photovoltaic-storage-direct-flexible integrated system in a winery industrial park, comprising:

[0025] 1) When the solar energy is below 30% peak, the thermal storage unit releases the stored steam to supply steam. When the thermal storage unit is insufficient, the high-temperature water source heat pump is started and connected in parallel with the supplementary heat source to supplement the thermal storage unit with steam.

[0026] 2) When the solar energy reaches 30%-50% of its peak, the thermal storage unit is charged by the photovoltaic power generation unit, and the thermal storage unit releases the stored steam to supply steam. When the thermal storage unit is insufficient, the high-temperature water source heat pump, air source heat pump, and electric steam boiler are started in parallel with the supplementary heat source to supplement the thermal storage unit with steam.

[0027] 3) When the solar energy reaches 50%-100% peak, the thermal storage unit is charged by the photovoltaic power generation unit. When the thermal storage unit is insufficient, the high-temperature water source heat pump, air source heat pump, and electric steam boiler are started in parallel with the supplementary heat source to supplement the thermal storage unit with steam.

[0028] 4) When the solar energy drops to 50%-30% of its peak value, the thermal storage unit and the high-temperature water source heat pump work together to supply steam, supplementing the heat source and supplementing the steam supply.

[0029] Compared with the prior art, the beneficial effects of the present invention are:

[0030] 1. This invention combines photovoltaic-energy storage-charging-DC microgrid-flexible electricity consumption with a solar steam system, and coordinates the time-sharing operation method of electricity consumption balance and the time-sharing operation method of steam balance to form a zero-carbon steam production system based on the integrated photovoltaic-storage-DC-flexible system in the winery park. This forms an energy microgrid that couples an independent DC microgrid, energy storage (electricity storage and heat storage), and clean energy, realizing coordinated power and heat supply, and achieving self-regulation and flexible response of the energy system, thus forming an integrated production, supply, and consumption system.

[0031] 2. This invention combines "generation and consumption" and "electricity and heat" without affecting the traditional winemaking process and ensuring stable production. It breaks through the single photovoltaic power generation and "self-generation and self-consumption with surplus electricity fed into the grid" model in industrial parks, and also breaks through the single heat energy supply model. The surplus electricity generated by the photovoltaic power generation can be used for energy storage or to power DC charging piles. Any remaining surplus electricity can be used to supply high-temperature heat pumps to produce steam and for heating the factory area. This promotes energy conservation, efficiency improvement, carbon reduction, and green energy transformation in the winemaking industry, and gradually realizes a comprehensive technology demonstration of the integration and complementarity of energy subsystems such as photovoltaic power generation, energy storage, waste heat recovery, heating, and cooling.

[0032] 3. In this invention, energy is a combination of new energy sources and other energy forms. New energy power generation can be one or more renewable energy sources such as solar and wind power. Other energy forms can be industrial waste heat, low-temperature heat sources, or primary and secondary energy sources. Waste heat recovery in this invention can be the recovery of waste heat generated during production, or the recovery of waste heat from flue gas, other high-grade industrial waste heat, or a combination of one or more. The low-temperature heat source involved in this invention can be an air source, a wastewater source, or other forms of low-temperature heat source, or a combination of two or more. In this invention, energy storage is one or more combinations of electricity storage and heat storage. Energy storage in this system is used for electricity and steam storage, and can also be used in heating and cooling systems. This invention mentions four subsystems to realize electricity generation and consumption, steam supply, heating, and cooling; combinations of two or more subsystems are also possible. In this invention, the energy storage unit can store solar power, wind power, or add a valley electricity storage module.

[0033] 4. This invention takes the energy demand of the wine industry as the main focus, and combines the energy characteristics of other industries to implement classified policies: The park is equipped with a "photovoltaic-energy storage-charging-DC microgrid-flexible power consumption" model. Photovoltaic modules are installed on building roofs. Based on a new power system that integrates AC and DC power distribution, a multi-energy collaborative system is built to utilize industrial waste heat, low-grade natural heat, smart grid and energy storage technology. At the physical level, the coordination and optimization of each link of "source-grid-load-etc." are carried out to realize the large-scale, systematic and comprehensive application of low-carbon energy.

[0034] 5. This invention takes the energy demand of the wine industry as the main focus, and combines the energy characteristics of other industries to implement classified policies: The park is equipped with a "photovoltaic-energy storage-charging-DC microgrid-flexible power consumption" model. Photovoltaic modules are installed on building roofs. Based on a new power system that integrates AC and DC power distribution, a multi-energy collaborative system of industrial waste heat, low-grade natural heat, smart grid and energy storage technology is built. At the physical level, the coordination and optimization of the operation of each link of "source-grid-load-etc." is carried out to realize the large-scale, systematic and comprehensive application of low-carbon energy.

[0035] 6. Based on the integrated photovoltaic-storage-DC-flexible zero-carbon steam production system in the winery park, solar photovoltaic, energy storage, and DC power distribution are interconnected through flexible interactive technology. A "photovoltaic-energy storage-charging-DC microgrid-flexible power load" mode is configured, integrating AC and DC power distribution and connecting to the municipal power grid. This provides electricity to the electrification equipment of the energy system—high-temperature heat pumps and electric steam boilers—to produce steam. Simultaneously, parabolic trough solar collectors receive and collect solar radiation, achieving photothermal conversion and storage to produce high-temperature steam, which is then delivered to the brewing production line. This system integrates "photovoltaics + energy storage batteries + factory electricity," "solar thermal collection + thermal storage," "waste heat recovery and utilization," and "low-temperature heat source heat pump heating." The main components of the system are: rooftop photovoltaic modules, energy storage power station, electric steam boiler, high-temperature water source heat pump, high-temperature air source heat pump, flash evaporation system, other AC and DC power (factory electricity, DC charging piles, etc.), transformer, municipal power grid, solar collectors, steam storage, and industrial production steam supply devices (brewing steam).

[0036] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the zero-carbon steam generation system based on the integrated photovoltaic-storage-direct-flexible system in a winery industrial park, as described in this invention.

[0038] Figure 2 Schematic diagram of the subsystem division of this invention;

[0039] Figure 3 This is a schematic diagram illustrating the coordinated operation of steam production and storage using photothermal and photoelectric technologies in this invention.

[0040] Figure 4 This is the power balance analysis diagram for the winery according to the present invention;

[0041] Figure 5 This is a steam balance analysis diagram for wineries according to the present invention;

[0042] Among them, 1. Photovoltaic modules; 2. Transformers; 3. Municipal power grid; 4. Energy storage power station; 5. High-temperature water source heat pump; 6. Air source heat pump; 71. First flash tank; 72. Second flash tank; 8. Thermal storage unit; 9. Solar collector; 10. Electric steam boiler; 11. Industrial production steam supply device; 12. Supplementary heat source; 13. Other AC and DC power. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] Example 1

[0046] This invention adopts a "photovoltaic-energy storage-charging-DC microgrid-flexible power load" model to construct a new type of power system that integrates AC and DC power distribution, and completes the integrated photovoltaic-energy storage-DC-flexible zero-carbon steam production system in the winery park.

[0047] Specifically, this invention provides a technical solution: a zero-carbon steam generation system based on a direct-to-flexible integrated photovoltaic-storage system in a winery industrial park, such as... Figure 1-3 As shown, it includes an electric power system, a solar thermal collection system, an electrified steam generation system, a supplementary heat source steam supply system, and an industrial production steam supply device 11.

[0048] The power system is used to supply power to the electrified steam system. The power system includes photovoltaic power generation units, energy storage units, microgrid transmission and distribution units, power consumption units, other AC and DC power consumption units, DC charging piles, heating and cooling system equipment, etc.

[0049] The connection relationships between the devices are as follows:

[0050] 1. Photovoltaic power generation and energy storage: The photovoltaic power generation unit includes photovoltaic module 1; photovoltaic module 1 is used to convert solar energy into electrical energy and then into direct current through a DC / DC converter, which is directly connected to the DC bus.

[0051] The energy storage unit includes an energy storage power station 4; the energy storage power station 4 is connected to the DC bus via a bidirectional DC / DC controller to store excess electrical energy and release it to supply power when sunlight is insufficient, ensuring a stable power supply to the system. The microgrid transmission and distribution unit includes the municipal power grid 3, which charges the DC bus via transformer 2 (if energy storage is insufficient).

[0052] 2. DC-side loads: Other AC / DC power-consuming DC equipment is directly powered by the DC bus, reducing AC / DC conversion losses.

[0053] 3. AC side load and steam generation process:

[0054] An electrified steam generation system is used to produce steam. The gasification steam generation system includes a high-temperature water source heat pump 5, an air source heat pump 6, a first flash tank 71, a second flash tank 72, and an electric steam boiler 10. The high-temperature water source heat pump 5 recovers waste heat resources, heating them to a high temperature and outputting the heat to the first flash tank 71. The first flash tank 71 uses the high-temperature heat resources from the high-temperature water source heat pump 5 to generate steam. The air source heat pump 6 heats air and outputs it to the second flash tank 72. The second flash tank 72 uses the heated air from the air source heat pump 6 to generate steam. The electric steam boiler 10 directly generates steam after being powered on.

[0055] The high-temperature water source heat pump 5, air source heat pump 6, and electric steam boiler 10 are connected to the AC bus via a DC / AC inverter and powered by the AC bus, converting electrical energy into heat energy for brewing steam. The high-temperature water source heat pump 5 and air source heat pump 6 obtain electricity through the AC bus to drive the heat pump equipment to extract heat for heating the plant area.

[0056] The solar thermal system is used to generate steam by collecting solar energy. The solar thermal system includes a solar collector 9 and a thermal storage unit 8. The solar collector 9 is used to generate steam by collecting solar energy and transfer the steam to the thermal storage unit 8. The thermal storage unit 8 is used to store the steam generated by the electrified steam system and the steam generated by the solar collector 9 and output it to the industrial production steam supply device 11.

[0057] Solar collector 9 operates independently of the power system, directly converting solar energy into steam, which is then fed into thermal storage unit 8 (steam storage) for brewing steam. Other AC / DC power 13 is supplied by the AC bus, prioritizing the use of photovoltaic and energy storage power.

[0058] 4. Steam storage and supply: The heat storage unit 8 (steam storage) integrates the steam output from the electric steam boiler 10, the steam output from the high-temperature water source heat pump 5 and the first flash tank 71, the steam output from the air source heat pump 6 and the second flash tank 72, and the solar collector 9 to balance the steam supply and demand, output steam, supplement the output steam from the heat source 12, and stably supply the steam for brewing.

[0059] The supplementary heat source steam supply system is used to provide supplementary steam, and the industrial production steam supply device 11 is used to utilize brewing steam.

[0060] 5. Grid Interconnection and Backup: The municipal power grid 3 is connected to the system through transformer 2 to supplement power supply when photovoltaic and energy storage are insufficient, ensuring system redundancy.

[0061] 6. Waste heat recovery process: The waste heat from the industrial production steam supply device 11 (brewing steam) is sent to a high-temperature water heat pump for heat recovery and regeneration into high-temperature water, and then the steam is regenerated through the first flash tank 71.

[0062] This invention comprises four subsystems, which are interconnected and coupled to achieve multi-functional collaboration. Each subsystem contains multiple modules / units.

[0063] Subsystem I is: power system, including photovoltaic power generation unit (photovoltaic module 1), energy storage unit (energy storage power station 4), microgrid transmission and distribution unit (AC / DC transmission and distribution lines connecting the power generation and consumption unit and the municipal power grid 3, transformer 2, DC / DC controller, DC / AC inverter), and power consumption unit (other AC / DC power consumption 13, power load of subsystem III); other AC / DC power consumption 13 includes power consumption for production and living in the factory area (DC and AC power consumption), DC charging piles, and power equipment for heating and cooling systems.

[0064] Subsystem II is a solar thermal system, including a solar thermal collection unit (solar collector 9) and a thermal storage unit 8 (steam storage).

[0065] Subsystem III is an electrified steam generation system, including a waste heat recovery steam generation unit (high-temperature water source heat pump 5, first flash tank 71), a low-temperature heat source steam generation unit (air source heat pump 6, second flash tank 72), and an electric direct heating unit (electric steam boiler 10).

[0066] Subsystem IV, supplementary heat source steam supply system, including supplementary heat source 12.

[0067] Subsystem I is connected to Subsystems III and IV, providing them with green electricity. Subsystems I and IV are also connected to the external municipal power grid 3, enabling "surplus electricity to be fed into the grid" and supplementing municipal power supply, thus ensuring power supply.

[0068] Subsystem I and subsystem II are relatively independent.

[0069] Subsystem II is connected to subsystem III. Subsystem II uses solar energy to collect heat to produce steam and store it. Steam ①, steam ②, and steam ③ generated by subsystem III enter the heat storage unit 8 of subsystem II. The waste heat recovery steam production unit of subsystem III recovers waste heat from the production process and uses the green electricity provided by subsystem I as the main equipment to drive the steam production. It is connected to the heat storage unit 8 of subsystem II, allowing for flexible storage and release.

[0070] Subsystem IV is connected to thermal storage unit 8 to achieve continuous and stable steam supply.

[0071] This invention adopts the following "photovoltaic-energy storage-charging-DC microgrid-flexible power load" model:

[0072] When photovoltaic power generation is below 30% of its peak value, power is supplied by energy storage units and / or microgrid transmission and distribution units, and steam is supplied by an electrified steam generation system and supplementary heat source 12. When photovoltaic power generation is between 30% and 50% of its peak value, power is supplied by photovoltaic power generation units, energy storage units and / or microgrid transmission and distribution units, and steam is supplied by an electrified steam generation system, solar thermal collection system and supplementary heat source 12. When photovoltaic power generation is between 50% and 100% of its peak value, power is supplied by photovoltaic power generation units, and steam is supplied by an electrified steam generation system and solar thermal collection system, and steam is stored in the thermal storage unit 8.

[0073] This invention is based on a zero-carbon steam generation system integrating photovoltaic, energy storage, direct current, and flexible power distribution in a winery industrial park. It interconnects solar photovoltaic, energy storage, and DC power distribution through flexible interactive technology, configuring a "photovoltaic-energy storage-charging-DC microgrid-flexible power load" mode. AC and DC power distribution are integrated and connected to the municipal power grid 3 to provide electricity for the electrification equipment of the energy system—high-temperature water source heat pump 5 and electric steam boiler 10—to produce steam. At the same time, a parabolic trough solar collector 9 is used to receive and collect solar radiation to achieve photothermal conversion and storage, produce high-temperature steam, and transport it to the brewing production line. This system integrates "photovoltaic + energy storage power station 4 + factory area electricity", "solar thermal collection + thermal storage", "waste heat recovery and utilization" and "low temperature heat source heat pump heating". The main components of the system are: rooftop photovoltaic modules 1, energy storage power station 4, electric steam boiler 10, high temperature water source heat pump 5, air source heat pump 6, flash evaporation system (first flash tank 71 and second flash tank 72), other AC and DC power supply 13 (factory area electricity, DC charging pile, etc.), transformer 2, municipal power grid 3, solar collector 9, thermal storage unit 8 (steam storage, thermal storage tank, etc.), and industrial production steam supply (brewing steam).

[0074] This invention fully utilizes photovoltaic modules 1 installed on building rooftops to achieve clean power supply for the industrial park through solar power generation. To fully utilize photovoltaic energy storage and meet nighttime office and lighting loads, a vanadium redox flow storage power station 4 is configured as needed. In addition, DC charging piles are installed within the winery, following an energy supply model primarily based on "fast charging for public use and slow charging for self-use," mainly serving the park's dedicated vehicles and employee electric vehicles. The scope of "self-generated and self-consumed" electricity is expanded: in addition to electricity used for production and office work in the factory area, surplus electricity can be supplied to the high-temperature water source heat pump 5 for steam production and for heating and cooling equipment in the factory area. Any remaining surplus electricity can be used for energy storage or to power other AC / DC electrical equipment 13 in the factory area. "Surplus electricity fed into the grid": any remaining surplus electricity is connected to the AC distribution network through the distribution transformer 2 and sold to the power grid company. This promotes energy conservation and efficiency in winemaking, green transformation, and gradually realizes a demonstration of industrial steam supply technology that integrates and complements various energy subsystems such as photovoltaic, solar thermal, energy storage, waste heat recovery, and heating.

[0075] Example 2

[0076] This invention also provides a method for time-of-use operation of a photovoltaic-storage-direct-flexible integrated zero-carbon steam generation system applied to a winery industrial park, comprising:

[0077] 1) When photovoltaic power generation is below 30% of its peak value, such as in the early morning (5:00-6:00), the photovoltaic power generation is close to zero output and is powered by the energy storage station 4. The power supply priority order is: electrified steam system, industrial production steam supply device 11, and other AC and DC power consumption 13.

[0078] The winery's basic load is prioritized to be powered by the energy storage power station 4 (such as lighting, high-temperature water source heat pump 5, electric steam boiler 10, air source heat pump 6, etc.), and is given priority for heat pump power supply to reduce grid dependence.

[0079] 2) When photovoltaic power generation rises to 30%-50% of its peak, such as in the morning (6:00-8:00), the power supply is mainly provided by the photovoltaic power generation unit and supplemented by the energy storage station 4 or the municipal power grid 3.

[0080] Photovoltaic power is prioritized for supplying high-temperature water source heat pump 5, and any remaining power is supplied by energy storage power station 4 or municipal power grid 3.

[0081] 3) When the photovoltaic power generation is at 50%-100% peak, such as the midday peak (8:00-16:00), the photovoltaic power generation unit supplies power, and the winery's electrical equipment operates centrally to charge the energy storage station 4 to full capacity;

[0082] The all-photovoltaic-driven high-temperature heat pump generates steam at full load, while the air-source heat pump 6 meets both cooling and heating needs. The winery's electrical equipment operates centrally (e.g., bottling, sterilization). The energy storage power station 4 continuously charges to full capacity, and excess photovoltaic power can be considered for grid connection.

[0083] 4) When photovoltaic power generation drops to 50%-30% of its peak, such as in the afternoon-evening (16:00-19:00), the photovoltaic power generation unit supplies power to the electrified steam system and the core equipment of the winery, and switches the air source heat pump 6 to a low power consumption mode to supplement the power supply through the energy storage station 4, making up for the photovoltaic gap and delaying the purchase of electricity from the grid.

[0084] This invention:

[0085] (1) In terms of further energy conservation and efficiency improvement:

[0086] Compared to the current "self-consumption, surplus power to the grid" photovoltaic power generation model, this invention's "photovoltaic-storage-DC-flexible" system in the industrial park incorporates energy storage modules that directly utilize direct current (DC) power, reducing energy losses during AC-DC conversion and improving energy conversion efficiency. Furthermore, considering the park's thermal energy needs, the solar thermal collector modules in this system directly convert and store thermal energy, avoiding energy losses during solar power generation and the subsequent conversion of green electricity into thermal energy. Figure 4 , 5 As shown.

[0087] (2) In terms of environmental friendliness, energy conservation and carbon reduction:

[0088] In this invention, both electricity and heat are generated using solar energy as the primary energy source, replacing traditional energy sources, significantly reducing fossil fuel consumption, lowering carbon emissions, and meeting the requirements of green production. This is particularly important for the brewing industry, as the energy consumed by the brewery's steam supply accounts for approximately 80% of the total energy consumption of the brewery. Currently, the industry mainly relies on traditional fossil fuels, which typically involve large amounts of energy consumption and greenhouse gas emissions. This invention can achieve large-scale energy substitution, reducing traditional energy consumption by more than 30%.

[0089] (3) In terms of flexibility and scalability:

[0090] This invention incorporates various types and grades of energy subsystems. The photovoltaic-storage-direct-flexible system is flexibly designed and can be expanded according to the scale and planned capacity of the brewery, adapting to different production scales. This flexibility allows the brewery to easily upgrade its technology and expand its capacity while maintaining production.

[0091] (4) Regarding safety, stability, and energy costs:

[0092] Reduced operational risks: Through energy storage and peak-valley electricity pricing management, breweries can better cope with energy price fluctuations and improve the stability of economic benefits. Meanwhile, the "photovoltaic-storage-DC-flexible" power system and the municipal power grid provide dual power supply guarantees, reducing production risks caused by weather factors and grid failures, and improving power supply reliability.

[0093] Example 3

[0094] This invention also provides a method for time-sharing steam balance operation of a zero-carbon steam generation system based on a photovoltaic-storage-direct-flexible integrated system in a winery industrial park, comprising:

[0095] 1] When the solar energy is below 30% peak, such as during the dawn period (5:00-6:00), the thermal storage unit 8 releases the stored steam to supply steam. When the thermal storage unit 8 is insufficient, the high-temperature water source heat pump 5 is started and connected in parallel with the supplementary heat source 12 to supplement the thermal storage unit 8 with steam.

[0096] 2] When the solar energy reaches 30%-50% of its peak, such as in the early morning (6:00-8:00), the thermal storage unit 8 is charged by the photovoltaic power generation unit, and the thermal storage unit 8 releases the stored steam to supply steam. When the thermal storage unit 8 is insufficient, the high-temperature water source heat pump 5, the air source heat pump 6, and the electric steam boiler 10 are started and connected in parallel with the supplementary heat source 12 to supplement the thermal storage unit 8 with steam.

[0097] 3] When the solar energy is increased to 50%-100% peak, such as during the main solar energy supply period (8:00-16:00), the thermal storage unit 8 is charged by the photovoltaic power generation unit. When the thermal storage unit 8 is insufficient, the high-temperature water source heat pump 5, air source heat pump 6, and electric steam boiler 10 are started and connected in parallel with the supplementary heat source 12 to supplement the thermal storage unit 8 with steam.

[0098] 4] When the solar energy drops to 50%-30% of its peak, for example during the transition period (16:00-19:00), the thermal storage unit 8 and the high-temperature water source heat pump 5 work together to supply steam, and the supplementary heat source 12 is connected in parallel to supplement the steam supply.

[0099] The "supplementary heat source 12" mentioned in this invention can be a gas-fired boiler, or other forms of stable heat source such as external steam supply or external high-grade industrial waste heat, depending on resource conditions.

[0100] In this invention, the power balance and steam balance operation methods adopt a time-segmented operation strategy, and the time periods can be defined and adjusted.

[0101] The "photovoltaic-storage-DC-flexible" system of this invention utilizes solar photovoltaic, energy storage, DC power distribution, and flexible interconnection technologies to systematically construct a low-carbon or zero-carbon energy system. In industrial parks, solar energy is primarily used for photovoltaic power generation, typically for self-consumption to replace some electricity consumption, with surplus electricity fed into the grid. While some industrial sectors utilize independent solar steam systems, photovoltaic power generation and solar steam systems remain separate entities and independent systems, and a fully integrated solar-power-thermal supply system has not yet been achieved.

[0102] This invention combines photovoltaic-energy storage-charging-DC microgrid-flexible electricity consumption with a solar steam system, and coordinates the time-sharing operation method of electricity consumption balance and the time-sharing operation method of steam balance to form a zero-carbon steam production system based on the integrated photovoltaic-storage-DC-flexible system in the winery park. This forms an energy microgrid that couples an independent DC microgrid, energy storage (electricity storage and heat storage), and clean energy, realizing coordinated power and heat supply, and enabling the energy system to self-regulate and respond flexibly, thus forming an integrated production, supply, and consumption system.

[0103] Furthermore, in this invention, energy is a combination of new energy sources and other energy forms. New energy power generation can be one or more renewable energy sources such as solar and wind power; other energy forms can be industrial waste heat, low-temperature heat sources, or primary and secondary energy sources. Waste heat recovery in this invention can be the recovery of waste heat generated during production, or the recovery of waste heat from flue gas, other high-grade industrial waste heat, or a combination of one or more. The low-temperature heat source involved in this invention can be an air source, a wastewater source, or other forms of low-temperature heat source, or a combination of two or more. In this invention, energy storage is one or more combinations of electricity storage and heat storage. Energy storage in this system is used for electricity and steam storage, and can also be used in heating and cooling systems. This invention mentions four subsystems to realize electricity generation and consumption, steam supply, heating, and cooling; combinations of two or more subsystems are also possible. In this invention, the energy storage unit can store solar power, wind power, or add a valley electricity storage module.

[0104] In the description of this invention, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0105] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0106] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A zero-carbon steam generation system integrating photovoltaic storage, direct current, and flexible steam generation in a winery industrial park, characterized in that: It includes an electric power system, a solar thermal collector system, an electrified steam generation system, a supplementary heat source steam supply system, and an industrial production steam supply device; the electric power system supplies power to the electrified steam generation system; the electrified steam generation system generates steam; the solar thermal collector system generates steam using solar energy; the supplementary heat source steam supply system provides supplementary steam; and the industrial production steam supply device utilizes brewing steam. The power system includes a photovoltaic power generation unit, an energy storage unit, and a microgrid transmission and distribution unit; The electrified steam generation system includes a high-temperature water source heat pump, an air source heat pump, a first flash tank, a second flash tank, and an electric steam boiler. The high-temperature water source heat pump is used to recover waste heat resources, heat them to a high temperature, and output them to the first flash tank. The first flash tank is used to generate steam using the high-temperature heat resources of the high-temperature water source heat pump. The air source heat pump is used to heat air and output it to the second flash tank. The second flash tank is used to generate steam using the hot air from the air source heat pump. The electric steam boiler is used to directly generate steam after being powered on. When photovoltaic power generation is below 30% of its peak value, power is supplied by energy storage units and / or microgrid transmission and distribution units, with electrified steam generation systems and supplementary heat sources providing steam to each other. When photovoltaic power generation is between 30% and 50% of its peak value, power is supplied by photovoltaic power generation units, energy storage units, and / or microgrid transmission and distribution units, with electrified steam generation systems, solar thermal collection systems, and supplementary heat sources providing steam to each other. When photovoltaic power generation is between 50% and 100% of its peak value, power is supplied by photovoltaic power generation units, with electrified steam generation systems and solar thermal collection systems providing steam, and steam is stored in the energy storage unit.

2. The zero-carbon steam generation system based on the integrated photovoltaic-storage-direct-flexible system in a winery industrial park as described in claim 1, characterized in that: The solar thermal system includes a solar collector and a thermal storage unit. The solar collector is used to generate steam by collecting solar energy and then transfer the steam to the thermal storage unit. The thermal storage unit is used to store the steam generated by the electrified steam system and the steam generated by the solar collector, and then output the steam to the industrial production steam supply device.

3. The zero-carbon steam generation system based on the integrated photovoltaic-storage-direct-flexible system in a winery industrial park, as described in claim 1, is characterized in that: The power system includes at least power consumption units, other AC and DC power consumption, DC charging piles, and electrical equipment for heating and cooling systems.

4. The zero-carbon steam generation system based on the integrated photovoltaic-storage-direct-flexible system in a winery industrial park as described in claim 1, characterized in that: The photovoltaic power generation unit includes photovoltaic modules; the photovoltaic modules are used to convert solar energy into electrical energy and then into direct current through a DC / DC converter, which is then directly connected to the DC bus.

5. The zero-carbon steam generation system based on the integrated photovoltaic-storage-direct-flexible system in a winery industrial park, as described in claim 3, is characterized in that: The microgrid power transmission and distribution unit includes the municipal power grid, which charges the DC bus through a transformer, while other DC electrical equipment that uses AC or DC power is directly powered by the DC bus.

6. The zero-carbon steam generation system based on the integrated photovoltaic-storage-direct-flexible system in a winery industrial park as described in claim 1, characterized in that: The energy storage unit includes an energy storage power station; the energy storage power station is used to connect to a DC bus via a bidirectional DC / DC controller, store excess electrical energy, and release electrical energy to supply power when there is insufficient sunlight.

7. The zero-carbon steam generation system based on the integrated photovoltaic-storage-direct-flexible system in a winery industrial park as described in claim 1, characterized in that: The high-temperature water source heat pump, air source heat pump, and electric steam boiler are connected to the AC bus via a DC / AC inverter and powered by the AC bus.

8. A method for time-of-use operation of a power-balanced system based on a photovoltaic-storage-direct-flexible integrated zero-carbon steam generation system in a winery industrial park, as described in any one of claims 1-7, characterized in that: include: 1) When photovoltaic power generation is below 30% of its peak value, the power supply is provided by the energy storage power station. The power supply priority order is: electrified steam system, industrial production steam supply device, and other AC / DC power consumption. 2) When photovoltaic power generation rises to 30%-50% of its peak, power supply will be primarily provided by photovoltaic power generation units, supplemented by energy storage power stations or municipal power grid supply. 3) When the photovoltaic power generation is at its peak of 50%-100%, the photovoltaic power generation unit supplies power, and the winery's electrical equipment operates centrally to charge the energy storage station to full capacity; 4) When photovoltaic power generation drops to 50%-30% of its peak value, the photovoltaic power generation unit supplies power to the electrified steam system and the core equipment of the winery, and switches the air source heat pump to a low power consumption mode to supplement power supply through the energy storage station.

9. A method for time-sharing steam balance operation of a zero-carbon steam generation system based on a photovoltaic-storage-direct-flexible integrated system in a winery industrial park, as described in any one of claims 1-7, characterized in that: include: 1) When the solar energy is below 30% peak, the thermal storage unit releases the stored steam to supply steam. When the thermal storage unit is insufficient, the high-temperature water source heat pump is started and connected in parallel with the supplementary heat source to supplement the thermal storage unit with steam. 2) When the solar energy reaches 30%-50% of its peak, the thermal storage unit is charged by the photovoltaic power generation unit, and the thermal storage unit releases the stored steam to supply steam. When the thermal storage unit is insufficient, the high-temperature water source heat pump, air source heat pump, and electric steam boiler are started in parallel with the supplementary heat source to supplement the thermal storage unit with steam. 3) When the solar energy reaches 50%-100% peak, the thermal storage unit is charged by the photovoltaic power generation unit. When the thermal storage unit is insufficient, the high-temperature water source heat pump, air source heat pump, and electric steam boiler are started in parallel with the supplementary heat source to supplement the thermal storage unit with steam. 4) When the solar energy drops to 50%-30% of its peak value, the thermal storage unit and the high-temperature water source heat pump work together to supply steam, supplementing the heat source and supplementing the steam supply.

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