Comprehensive energy system for zero-carbon park

Abstract

The utility model discloses an integrated energy system for a zero-carbon park, and relates to the technical field of energy integration. The system comprises an energy production module and an energy conversion and output module which are used for being deployed in a zero-carbon park, and the energy production module comprises a photovoltaic photo-thermal integrated assembly unit, a vertical axis wind turbine and a standby power supply unit. The energy conversion and output module comprises a cold storage unit, a phase change heat storage unit, an electricity storage unit, a photovoltaic direct-driven variable-frequency centrifugal water chilling unit / multi-connected air conditioning unit and a heat pump subsystem, and through the connection relation of the cold storage unit, the phase change heat storage unit, the electricity storage unit, the photovoltaic direct-driven variable-frequency centrifugal water chilling unit / multi-connected air conditioning unit and the heat pump subsystem, the obtained comprehensive energy system can have the characteristics of renewable energy source integration, multi-energy complementation, multi-mode energy storage, modular design and the like. Therefore, efficient collaborative supply of electricity, heat, cold and the like can be achieved, the purposes of efficient energy utilization and carbon neutralization in the park are achieved, the system is particularly suitable for occasions such as industrial parks and science parks which have high energy consumption and need low-carbon energy supply, and practical application and popularization are facilitated.

Description

An integrated energy system for zero-carbon industrial parks Technical Field

[0001] This utility model belongs to the field of integrated energy technology, specifically relating to an integrated energy system for zero-carbon industrial parks. Background Technology

[0002] With the escalation of global climate change and the energy crisis, the concept of zero-carbon parks has gradually attracted attention from all sectors of society. Zero-carbon parks aim to achieve efficient energy utilization and ultimately zero carbon emissions within the park by integrating various clean energy sources and efficient energy utilization technologies.

[0003] In the context of dual carbon emissions, zero-carbon integrated energy systems (IES) at the park level have become a key focus for achieving energy conservation, carbon reduction, and improved efficiency. However, the characteristics of park-level integrated energy systems, such as the integration of source, grid, load, and storage, multi-energy complementarity, and dynamic game theory between supply and demand, pose numerous challenges to their optimized operation technology, including strong uncertainties and unclear coupling mechanisms.

[0004] Currently, existing integrated energy systems suffer from the following shortcomings: (1) Low energy efficiency: Traditional energy systems often rely on a single energy source, failing to fully utilize multiple energy sources and resulting in energy waste; (2) Insufficient utilization of renewable energy: The proportion of renewable energy access in existing energy systems is low, and the regulation capacity is limited, making it difficult to meet the diverse energy needs of the park; (3) Outdated energy conservation and emission reduction technologies: The lack of efficient energy storage and intelligent regulation technologies leads to low energy utilization and difficulty in effectively controlling carbon emissions; (4) Insufficient multi-energy coupling: The ability to supply multiple forms of energy, such as cold, heat, electricity, and steam, is weak; (5) Low system integration: Existing energy systems lack unified management and optimization of multiple energy sources, energy storage devices, and load regulation, making it difficult to achieve true integrated energy management. Therefore, there is an urgent need to provide an integrated energy system that can achieve high energy efficiency and low carbon emissions to meet the needs of zero-carbon parks. Summary of the Invention

[0005] The purpose of this utility model is to provide an integrated energy system for zero-carbon parks, in order to solve the problems of existing integrated energy systems that are difficult to meet the needs of zero-carbon parks due to low energy efficiency, insufficient utilization of renewable energy, backward energy-saving and emission-reduction technologies, and insufficient multi-energy coupling.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides an integrated energy system for zero-carbon parks, including an energy production module and an energy conversion and output module for deployment in zero-carbon parks. The energy production module includes a photovoltaic-thermal integrated component unit, a vertical axis wind turbine, and a backup power supply unit. The energy conversion and output module includes a cold storage unit, a phase change thermal storage unit, an electric storage unit, a photovoltaic direct-drive variable frequency centrifugal chiller / multi-split air conditioning unit, and a heat pump subsystem.

[0008] The power output terminals of the photovoltaic-thermal integrated module unit, the vertical axis wind turbine, and the backup power unit are respectively used to connect to the power load of the zero-carbon park.

[0009] The power supply end of the cold storage unit is connected to the photovoltaic-thermal integrated module unit and the power output end of the vertical axis wind turbine, respectively, so as to make ice and store cold during off-peak hours in the zero-carbon park.

[0010] The heat source end of the phase change thermal storage unit is connected to the waste heat output end of the photovoltaic-thermal integrated module unit, so as to cooperate with the cold storage unit to provide combined cooling and heating for the zero-carbon park.

[0011] The charging end of the energy storage unit is connected to the photovoltaic-thermal integrated module unit and the power output end of the vertical axis wind turbine, respectively, while the discharging end of the energy storage unit is used to connect to the power load of the zero-carbon park.

[0012] The power supply end of the photovoltaic direct-drive variable frequency centrifugal chiller / multi-split air conditioning unit is connected to the power output end of the photovoltaic-thermal integrated module unit through a DC bus, so as to provide cooling for the zero-carbon park;

[0013] The heat source end of the heat pump subsystem is connected to the waste heat output end of the photovoltaic-thermal integrated module unit to provide cooling and / or heating for the zero-carbon park.

[0014] Based on the above-mentioned utility model content, a comprehensive energy structure scheme suitable for zero-carbon parks is provided, which includes an energy production module and an energy conversion and output module for deployment in zero-carbon parks. The energy production module includes a photovoltaic-thermal integrated module unit, a vertical axis wind turbine, and a backup power supply unit. The energy conversion and output module includes a cold storage unit, a phase change thermal storage unit, an electricity storage unit, a photovoltaic direct-drive variable frequency centrifugal chiller / multi-split air conditioning unit, and a heat pump subsystem. Through their interconnection, the resulting comprehensive energy system can have the characteristics of integrated renewable energy, multi-energy complementarity, multi-mode energy storage, and modular design, thereby achieving efficient and coordinated supply of electricity, heat, and cooling, which is conducive to achieving energy-efficient utilization and carbon neutrality goals within the park. It is particularly suitable for scenarios with high energy consumption and a need for low-carbon energy supply, such as industrial parks and science and technology parks, and is easy to apply and promote.

[0015] In one possible design, the backup power unit includes a water electrolysis hydrogen production device and a hydrogen fuel cell subsystem, and the energy conversion and output module also includes a hydrogen energy storage unit.

[0016] The power supply of the water electrolysis hydrogen production device is connected to the photovoltaic-thermal integrated module unit and the power output of the vertical axis wind turbine, respectively, so as to produce hydrogen and store energy during off-peak hours in the zero-carbon park.

[0017] The hydrogen output terminal of the water electrolysis hydrogen production device is connected to the hydrogen input terminal of the hydrogen energy storage unit, and the hydrogen output terminal of the hydrogen energy storage unit is connected to the hydrogen input terminal of the hydrogen fuel cell subsystem and the hydrogen supply terminal for connecting to the zero-carbon park.

[0018] The power output terminal of the hydrogen fuel cell subsystem is used to connect to the electrical load of the zero-carbon park;

[0019] The hot water output of the hydrogen fuel cell subsystem is connected to the heat source of the heat pump subsystem and / or to the hot water supply of the zero-carbon park.

[0020] In one possible design, when the cold storage unit includes an absorption chiller, the hot water output of the hydrogen fuel cell subsystem is connected to the heat source of the absorption chiller to drive the absorption chiller to provide cooling for the zero-carbon park.

[0021] In one possible design, the heat source end of the phase change thermal storage unit is also connected to the hot water output end of the hydrogen fuel cell subsystem.

[0022] In one possible design, when the cold storage unit includes an absorption chiller, the waste heat output terminal of the photovoltaic-thermal integrated module unit is connected to the heat source terminal of the absorption chiller to drive the absorption chiller to provide cooling for the zero-carbon park.

[0023] In one possible design, the phase change thermal storage unit uses a paraffin / graphene composite phase change material to store heat.

[0024] In one possible design, the combined operating modes of the photovoltaic-thermal integrated module unit and the photovoltaic direct-drive variable frequency centrifugal chiller / multi-split air conditioning unit include pure photovoltaic power generation mode, photovoltaic direct-drive mode, pure grid power air conditioning mode, photovoltaic-grid power hybrid power supply mode and / or photovoltaic direct-drive surplus power grid connection mode.

[0025] In one possible design, the energy conversion and output module also includes a combined steam supply unit for coupling with the phase change thermal storage unit, the steam output of which is used to connect to the steam supply of the zero-carbon park.

[0026] In one possible design, a work scheduling module for deployment in a zero-carbon park is also included, wherein the work scheduling instruction output terminal of the work scheduling module is connected to the controlled terminal of the backup power unit and the energy conversion and output module, respectively.

[0027] In one possible design, a carbon management module for deployment in a zero-carbon park is also included, wherein the carbon management module includes a real-time carbon accounting platform and / or carbon removal device;

[0028] The real-time carbon accounting platform is used to track the direct and indirect carbon emissions of zero-carbon parks using carbon flow models, and connects to the carbon trading market to purchase carbon credits to offset excess carbon emissions.

[0029] Carbon removal devices are used to absorb carbon emissions in order to reduce carbon emissions.

[0030] The beneficial effects of the above scheme are:

[0031] (1) This utility model provides a comprehensive energy structure solution suitable for zero-carbon parks, which includes an energy production module and an energy conversion and output module for deployment in zero-carbon parks. The energy production module includes a photovoltaic and solar thermal integrated module unit, a vertical axis wind turbine and a backup power unit. The energy conversion and output module includes a cold storage unit, a phase change heat storage unit, an electric storage unit, a photovoltaic direct-drive variable frequency centrifugal chiller / multi-split air conditioning unit and a heat pump subsystem. Through their connection relationship, the resulting comprehensive energy system can have the characteristics of integrated renewable energy, multi-energy complementarity, multi-mode energy storage and modular design, thereby realizing the efficient and coordinated supply of electricity, heat and cold, which is conducive to achieving the goal of efficient energy utilization and carbon neutrality in the park. It is particularly suitable for scenarios with high energy consumption and low carbon energy supply, such as industrial parks and science and technology parks.

[0032] (2) It has the advantages of efficient energy storage and time-sharing regulation: that is, it adopts advanced energy storage technology to solve the problem of the volatility of renewable energy;

[0033] (3) It has the advantage of multi-energy cascade utilization: namely, by using the waste heat of photovoltaic and photothermal integrated module units to drive cooling / heating, and by realizing the "electricity-hydrogen-heat" dual-path conversion through the hydrogen energy subsystem, the comprehensive energy utilization rate can be increased to more than 65%.

[0034] (4) It has the advantages of dynamic energy storage synergy: it can jointly regulate the cold and heat loads by phase change heat storage and water energy storage, and break through the bottleneck of traditional heat storage efficiency by adaptive adjustment technology of heat storage brick spacing.

[0035] (5) It has the advantages of photovoltaic direct drive system: by directly connecting the photovoltaic output DC power to the DC bus of the chiller / air conditioning unit, the energy loss in photovoltaic output voltage stabilization, grid-connected inverter and frequency conversion rectification can be saved, and the utilization rate of photovoltaic direct drive can be guaranteed.

[0036] (6) It has the advantages of carbon neutrality and technology integration: that is, through carbon capture and utilization technology, the carbon emissions of the park can be reduced in an all-round way;

[0037] (7) It has enabled the local consumption and efficient utilization of low-grade electricity such as wind and solar power in the zero-carbon park, as well as the local consumption of new energy sources, which is convenient for practical application and promotion. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 is a schematic diagram of the integrated energy system for zero-carbon parks provided in an embodiment of this utility model. Detailed Implementation

[0040] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other embodiments can be obtained based on these embodiments without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0041] It should be understood that although the terms "first" and "second", etc., may be used herein to describe various objects, these objects should not be limited by these terms. These terms are only used to distinguish one object from another. For example, the first object may be referred to as the second object, and similarly, the second object may be referred to as the first object, without departing from the scope of the exemplary embodiments of this utility model.

[0042] It should be understood that the term "and / or" that may appear in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, or A and B exist simultaneously. Another example is A, B and / or C, which can mean that any one of A, B, and C or any combination thereof exists. The term " / and" that may appear in this document describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone or A and B exist simultaneously. In addition, the character " / " that may appear in this document generally indicates that the related objects before and after it are in an "or" relationship.

[0043] Example

[0044] As shown in Figure 1, the integrated energy system provided in this embodiment for use in a zero-carbon park includes, but is not limited to, energy production modules and energy conversion and output modules respectively deployed in the zero-carbon park. The energy production modules include, but are not limited to, integrated photovoltaic and solar thermal module units, vertical axis wind turbines, and backup power supply units. The energy conversion and output modules include, but are not limited to, cold storage units, phase change thermal storage units, electricity storage units, photovoltaic direct-drive variable frequency centrifugal chillers / multi-split air conditioning units, and heat pump subsystems. The power output terminals of the integrated photovoltaic and solar thermal module units, the vertical axis wind turbines, and the backup power supply units are respectively connected to the electrical loads of the zero-carbon park. The power supply terminal of the cold storage unit is respectively connected to the integrated photovoltaic and solar thermal module units and the vertical axis wind turbines. The photovoltaic-thermal integrated module unit has an electrical output terminal for ice-making and cold storage during off-peak hours in the zero-carbon park; the heat source terminal of the phase change thermal storage unit is connected to the waste heat output terminal of the photovoltaic-thermal integrated module unit to cooperate with the cold storage unit for combined cooling and heating in the zero-carbon park; the charging terminal of the energy storage unit is connected to the electrical output terminals of the photovoltaic-thermal integrated module unit and the vertical axis wind turbine, respectively, and the discharging terminal of the energy storage unit is used to connect to the electrical load of the zero-carbon park; the power supply terminal of the photovoltaic direct-drive variable frequency centrifugal chiller / multi-split air conditioning unit is connected to the electrical output terminal of the photovoltaic-thermal integrated module unit through a DC bus to provide cooling for the zero-carbon park; the heat source terminal of the heat pump subsystem is connected to the waste heat output terminal of the photovoltaic-thermal integrated module unit to provide cooling and / or heating for the zero-carbon park.

[0045] As shown in Figure 1, in the specific structure of the integrated energy system, the photovoltaic-thermal integrated module unit is an existing energy device that utilizes solar energy to achieve simultaneous power generation and heat collection, capable of outputting both electrical energy and heat energy in the form of waste heat. The vertical axis wind turbine is an existing energy device that utilizes wind energy to generate electricity, adaptable to low wind speed environments, and forms a wind-solar complementary subsystem with the photovoltaic-thermal integrated module unit to reduce power generation volatility. The backup power unit is used to supplement the insufficient power during peak electricity periods in the zero-carbon park (i.e., high electricity price periods when electricity consumption is concentrated and power supply is tight, typically during the daytime, such as 8:00-22:00, when electricity prices are significantly higher than during off-peak periods). Specifically, it can be, but is not limited to, conventionally implemented using a fuel cell subsystem.

[0046] In the specific structure of the integrated energy system, the cold storage unit is used to utilize surplus electricity for ice-making and cold storage during off-peak hours (i.e., low-price periods relative to peak hours, when electricity consumption is not concentrated and power supply is not tight, typically at night) in the zero-carbon park, in order to supply ice or provide a cold source for the zero-carbon park. Preferably, when the cold storage unit includes, but is not limited to, an absorption chiller, the waste heat output terminal of the photovoltaic-thermal integrated module unit is connected to the heat source terminal of the absorption chiller to drive the absorption chiller to provide cooling for the zero-carbon park. The phase change heat storage unit is used to achieve waste heat storage, and may specifically, but is not limited to, using paraffin / graphene composite phase change materials to store heat. The electricity storage unit is used to charge and store surplus electricity during off-peak hours in the zero-carbon park and discharge during peak hours to supplement the lack of electricity, and may specifically, but is not limited to, using lithium iron phosphate batteries. The photovoltaic direct-drive inverter centrifugal chiller / multi-split air conditioning unit is an existing energy conversion device that converts energy generated by photovoltaic power generation into cooling capacity. Because it is directly connected to the photovoltaic-thermal integrated module unit via a DC bus, it can save energy losses in photovoltaic output voltage stabilization, grid-connected inverter, and frequency conversion rectification, ensuring the utilization rate of photovoltaic direct drive. Specifically, the combined working modes of the photovoltaic-thermal integrated module unit and the photovoltaic direct-drive inverter centrifugal chiller / multi-split air conditioning unit include, but are not limited to, a pure photovoltaic power generation mode (i.e., the photovoltaic-thermal integrated module unit does not supply power to the photovoltaic direct-drive inverter centrifugal chiller / multi-split air conditioning unit for cooling), and a photovoltaic-thermal integrated module unit. The photovoltaic (PV) direct-drive mode (where the PV-thermal integrated module unit supplies power only to the PV direct-drive inverter centrifugal chiller / multi-split air conditioning unit for cooling), pure grid-connected air conditioning mode (where only grid power supplies the PV direct-drive inverter centrifugal chiller / multi-split air conditioning unit for cooling), PV-grid hybrid power supply mode (where both the PV-thermal integrated module unit and grid power supply the PV direct-drive inverter centrifugal chiller / multi-split air conditioning unit for cooling), and / or PV direct-drive surplus power grid-connected mode (where surplus power from the PV-thermal integrated module unit is supplied to the PV direct-drive inverter centrifugal chiller / multi-split air conditioning unit for cooling via grid connection), etc. The heat pump subsystem is an existing energy conversion device for heat transfer, which can specifically adopt a parallel structure of air-source heat pump and water-source heat pump, combined with water storage to output 7℃ chilled water or 60℃ hot water to meet the needs of central air conditioning and park processes.

[0047] Based on the aforementioned detailed description of the integrated energy system, a comprehensive energy structure scheme suitable for zero-carbon parks is provided. This scheme includes an energy production module and an energy conversion and output module, respectively deployed in the zero-carbon park. The energy production module includes a photovoltaic-thermal integrated module unit, a vertical axis wind turbine, and a backup power unit. The energy conversion and output module includes a cold storage unit, a phase change thermal storage unit, an energy storage unit, a photovoltaic direct-drive variable frequency centrifugal chiller / multi-split air conditioning unit, and a heat pump subsystem. Through their interconnection, the resulting integrated energy system features integrated renewable energy, multi-energy complementarity, multi-mode energy storage, and modular design. This enables efficient and coordinated supply of electricity, heat, and cooling, facilitating the achievement of energy efficiency and carbon neutrality goals within the park. It is particularly suitable for scenarios with high energy consumption and a need for low-carbon energy supply, such as industrial parks and science and technology parks, and is easy to apply and promote.

[0048] Preferably, the backup power unit includes, but is not limited to, a water electrolysis hydrogen production device and a hydrogen fuel cell subsystem, and the energy conversion and output module includes, but is not limited to, a hydrogen energy storage unit; the power supply terminal of the water electrolysis hydrogen production device is connected to the power output terminal of the photovoltaic-thermal integrated module unit and the vertical axis wind turbine, respectively, so as to produce hydrogen and store energy during off-peak hours in the zero-carbon park; the hydrogen output terminal of the water electrolysis hydrogen production device is connected to the hydrogen input terminal of the hydrogen energy storage unit, and the hydrogen output terminal of the hydrogen energy storage unit is connected to the hydrogen input terminal of the hydrogen fuel cell subsystem and / or used to connect to the hydrogen supply terminal of the zero-carbon park; the power output terminal of the hydrogen fuel cell subsystem is used to connect to the electrical load of the zero-carbon park; the hot water output terminal of the hydrogen fuel cell subsystem is connected to the heat source terminal of the heat pump subsystem and / or used to connect to the hot water supply terminal of the zero-carbon park. The described water electrolysis hydrogen production device is an existing device that uses PEM (Proton Exchange Membrane) electrolysis technology to produce hydrogen. The hydrogen fuel cell subsystem is used to convert the chemical energy of hydrogen into electrical energy and generate high-temperature hot water (e.g., 120°C hot water). The hydrogen energy storage unit can specifically, but is not limited to, use the principle of metal hydride hydrogen storage to achieve hydrogen storage. Through the aforementioned specific structural design, a dual-path conversion of "electricity-hydrogen-heat" can also be achieved, further improving the overall energy utilization rate (tested to be over 65%).

[0049] Further preferably, when the cold storage unit includes an absorption chiller, the hot water output terminal of the hydrogen fuel cell subsystem is connected to the heat source terminal of the absorption chiller to drive the absorption chiller to provide cooling for the zero-carbon park; and the heat source terminal of the phase change thermal storage unit is also connected to the hot water output terminal of the hydrogen fuel cell subsystem. This further enables the dual-path conversion of "electricity-hydrogen-heat" and improves the overall energy utilization rate.

[0050] Preferably, the energy conversion and output module further includes, but is not limited to, a combined steam supply unit for coupling with the phase change thermal storage unit, wherein the steam output end of the combined steam supply unit is used to connect to the steam supply end of the zero-carbon park. The combined steam supply unit is used to supply steam to the zero-carbon park, for example, outputting steam at a pressure of 0.5-1.6 MPa on demand. Through the aforementioned specific structural design, efficient coordinated supply of electricity, heat, and steam can also be achieved, further applicable to scenarios with high energy consumption and requiring low-carbon energy supply, such as industrial parks and science parks.

[0051] Preferably, the system also includes, but is not limited to, a work scheduling module for deployment in the zero-carbon park, wherein the work scheduling command output terminal of the work scheduling module is connected to the backup power unit and the controlled terminal of the energy conversion and output module, respectively. This allows for work scheduling management of the backup power unit and various components in the energy conversion and output module (specifically, this can be achieved through conventional modifications based on existing work scheduling management technologies), giving the resulting integrated energy system intelligent control characteristics, further facilitating the achievement of energy efficiency and carbon neutrality goals within the park.

[0052] Preferably, the system also includes, but is not limited to, a carbon management module for deployment in the zero-carbon park. This carbon management module includes, but is not limited to, a real-time carbon accounting platform and / or carbon removal devices. The real-time carbon accounting platform is used to track the direct and indirect carbon emissions of the zero-carbon park using a carbon flow model and to connect to the carbon trading market to purchase carbon credits to offset excess carbon emissions. The carbon removal device is used to absorb carbon emissions to reduce emissions. The aforementioned carbon flow model is an existing core tool for quantifying the allocation of carbon emission responsibility in power systems. Its core principle is based on the dynamic correlation between power flow tracking and carbon emission intensity. It is mainly used to clarify the carbon emission responsibility of each node in the power grid (such as power plants and users), supporting carbon trading and emission reduction policy design. Therefore, the real-time carbon accounting platform can be conventionally built. The carbon removal device specifically, but is not limited to, rooftop greening and algae bioreactors, to achieve an annual carbon absorption of 5%-10% of the park's total emissions. This also allows the resulting integrated energy system to have low-carbon technology integration characteristics, further facilitating the achievement of energy efficiency and carbon neutrality goals within the park.

[0053] In summary, the integrated energy system for zero-carbon industrial parks provided in this embodiment has the following technical advantages:

[0054] (1) This embodiment provides a comprehensive energy structure scheme suitable for zero-carbon parks, which includes an energy production module and an energy conversion and output module for deployment in zero-carbon parks. The energy production module includes a photovoltaic and solar thermal integrated module unit, a vertical axis wind turbine and a backup power unit. The energy conversion and output module includes a cold storage unit, a phase change heat storage unit, an electric storage unit, a photovoltaic direct-drive variable frequency centrifugal chiller / multi-split air conditioning unit and a heat pump subsystem. Through their connection relationship, the resulting comprehensive energy system can have the characteristics of integrated renewable energy, multi-energy complementarity, multi-mode energy storage and modular design, thereby realizing the efficient and coordinated supply of electricity, heat and cold, which is conducive to achieving the goal of efficient energy utilization and carbon neutrality in the park. It is particularly suitable for scenarios with high energy consumption and low carbon energy supply, such as industrial parks and science and technology parks.

[0055] (2) It has the advantages of efficient energy storage and time-sharing regulation: that is, it adopts advanced energy storage technology to solve the problem of the volatility of renewable energy;

[0056] (3) It has the advantage of multi-energy cascade utilization: namely, by using the waste heat of photovoltaic and photothermal integrated module units to drive cooling / heating, and by realizing the "electricity-hydrogen-heat" dual-path conversion through the hydrogen energy subsystem, the comprehensive energy utilization rate can be increased to more than 65%.

[0057] (4) It has the advantages of dynamic energy storage synergy: it can jointly regulate the cold and heat loads by phase change heat storage and water energy storage, and break through the bottleneck of traditional heat storage efficiency by adaptive adjustment technology of heat storage brick spacing.

[0058] (5) It has the advantages of photovoltaic direct drive system: by directly connecting the photovoltaic output DC power to the DC bus of the chiller / air conditioning unit, the energy loss in photovoltaic output voltage stabilization, grid-connected inverter and frequency conversion rectification can be saved, and the utilization rate of photovoltaic direct drive can be guaranteed.

[0059] (6) It has the advantages of carbon neutrality and technology integration: that is, through carbon capture and utilization technology, the carbon emissions of the park can be reduced in an all-round way;

[0060] (7) It has enabled the local consumption and efficient utilization of low-grade electricity such as wind and solar power in the zero-carbon park, as well as the local consumption of new energy sources, which is convenient for practical application and promotion.

[0061] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A comprehensive energy system for zero-carbon industrial parks, characterized in that, The system includes energy production modules and energy conversion and output modules for deployment in zero-carbon parks. The energy production modules include integrated photovoltaic (PV) and solar thermal module units, vertical axis wind turbines, and backup power units. The energy conversion and output modules include a cold storage unit, a phase change thermal storage unit, an energy storage unit, a PV direct-drive variable frequency centrifugal chiller / multi-split air conditioning unit, and a heat pump subsystem. The power output terminals of the integrated PV and solar thermal module units, vertical axis wind turbines, and backup power units are connected to the electrical loads of the zero-carbon park. The power supply terminal of the cold storage unit is connected to the power output terminals of the integrated PV and solar thermal module units and the vertical axis wind turbines to provide power during valley hours in the zero-carbon park. During the electricity period, ice is made and stored for cooling. The heat source end of the phase change heat storage unit is connected to the waste heat output end of the photovoltaic-thermal integrated module unit to cooperate with the cold storage unit for combined cooling and heating in the zero-carbon park. The charging end of the energy storage unit is connected to the power output end of the photovoltaic-thermal integrated module unit and the vertical axis wind turbine, respectively. The discharging end of the energy storage unit is used to connect to the electrical load of the zero-carbon park. The power supply end of the photovoltaic direct-drive variable frequency centrifugal chiller / multi-split air conditioning unit is connected to the power output end of the photovoltaic-thermal integrated module unit through the DC bus to provide cooling for the zero-carbon park. The heat source end of the heat pump subsystem is connected to the waste heat output end of the photovoltaic-thermal integrated module unit to provide cooling and / or heating for the zero-carbon park.

2. The integrated energy system as described in claim 1, characterized in that, The backup power unit includes a water electrolysis hydrogen production device and a hydrogen fuel cell subsystem. The energy conversion and output module also includes a hydrogen energy storage unit. The power supply end of the water electrolysis hydrogen production device is connected to the power output end of the photovoltaic-thermal integrated module unit and the vertical axis wind turbine, respectively, so as to produce hydrogen and store energy during off-peak hours in the zero-carbon park. The hydrogen output end of the water electrolysis hydrogen production device is connected to the hydrogen input end of the hydrogen energy storage unit. The hydrogen output end of the hydrogen energy storage unit is connected to the hydrogen input end of the hydrogen fuel cell subsystem and / or used to connect to the hydrogen supply end of the zero-carbon park. The power output end of the hydrogen fuel cell subsystem is used to connect to the electrical load of the zero-carbon park. The hot water output end of the hydrogen fuel cell subsystem is connected to the heat source end of the heat pump subsystem and / or used to connect to the hot water supply end of the zero-carbon park.

3. The integrated energy system as described in claim 2, characterized in that, When the cold storage unit includes an absorption chiller, the hot water output of the hydrogen fuel cell subsystem is connected to the heat source of the absorption chiller so as to drive the absorption chiller to provide cooling for the zero-carbon park.

4. The integrated energy system as described in claim 2, characterized in that, The heat source end of the phase change thermal storage unit is also connected to the hot water output end of the hydrogen fuel cell subsystem.

5. The integrated energy system as described in claim 1, characterized in that, When the cold storage unit includes an absorption chiller, the waste heat output end of the photovoltaic-thermal integrated module unit is connected to the heat source end of the absorption chiller so as to drive the absorption chiller to provide cooling for the zero-carbon park.

6. The integrated energy system as described in claim 1, characterized in that, The phase change heat storage unit uses paraffin / graphene composite phase change material to store heat.

7. The integrated energy system as described in claim 1, characterized in that, The combined working modes of photovoltaic-thermal integrated module units and photovoltaic direct-drive variable frequency centrifugal chiller / multi-split air conditioning units include pure photovoltaic power generation mode, photovoltaic direct-drive mode, pure grid power air conditioning mode, photovoltaic-grid power hybrid power supply mode and / or photovoltaic direct-drive surplus power grid connection mode.

8. The integrated energy system as described in claim 1, characterized in that, The energy conversion and output module also includes a combined steam supply unit for coupling with the phase change thermal storage unit. The steam output end of the combined steam supply unit is used to connect to the steam supply end of the zero-carbon park.

9. The integrated energy system as described in claim 1, characterized in that, It also includes a work scheduling module for deployment in zero-carbon parks, wherein the work scheduling instruction output terminal of the work scheduling module is connected to the control terminal of the backup power unit and the energy conversion and output module, respectively.

10. The integrated energy system as described in claim 1, characterized in that, It also includes a carbon management module for deployment in zero-carbon parks, wherein the carbon management module includes a real-time carbon accounting platform and / or a carbon removal device; the real-time carbon accounting platform is used to track the direct and indirect carbon emissions of the zero-carbon park using a carbon flow model and to connect to the carbon trading market to purchase carbon sinks to offset excess carbon emissions; and the carbon removal device is used to absorb carbon emissions to reduce carbon emissions.

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