Geothermal energy-solar energy-wind energy-stored energy coupling zero-carbon combined cooling heating and power system

Abstract

The utility model provides a geothermal energy-solar energy-wind energy-stored energy coupling zero-carbon combined cooling heating and power system, and belongs to the technical field of coupling energy systems. The problem that an existing park multi-energy coupling system is low in energy utilization rate is solved. Comprising four subsystems including a renewable energy power generation system, an electrochemical energy storage system, a shallow geothermal energy utilization system and a cold and hot double energy storage system, and energy supply and demand distribution is achieved among the four subsystems through an energy management system; wherein the output end of the renewable energy power generation system is connected with the electrochemical energy storage system, the shallow geothermal energy utilization system, the cold and hot dual-energy storage system and the power input end of a load in a park building, and provides electric quantity for the shallow geothermal energy utilization system, the cold and hot dual-energy storage system and the load in the park building; the electrochemical energy storage system is used for storing redundant electric quantity of the renewable energy power generation system; the utility model is applied to industrial parks.

Description

Technical Field

[0001] This utility model provides a geothermal-solar-wind-energy-storage coupled zero-carbon combined cooling, heating and power system, belonging to the field of coupled energy system technology. Background Technology

[0002] Currently, the combustion of traditional fossil fuels remains the primary energy source in industrial parks, causing severe environmental pollution. Therefore, on the energy supply side, it is essential to utilize renewable energy sources as much as possible, reduce dependence on traditional fossil fuels, optimize the energy structure, and achieve green energy in the parks, which is fundamental to building zero-carbon parks. To reduce energy consumption and improve the environment in parks, and to promote the construction of zero-carbon industrial parks, it is urgent to develop efficient, energy-saving, and clean energy utilization technologies, accelerate the efficient transformation of the energy structure, and achieve sustainable energy development. Geothermal, solar, and wind energy, as renewable energy sources, can be coupled using multiple renewable energy technologies to create a green cooling, heating, and power (CHP) supply system for the parks, which is one path to building zero-carbon parks. However, existing multi-energy coupling systems generally consider solar and wind energy, and geothermal energy has not been effectively utilized within the parks. Therefore, this invention proposes a geothermal-solar-wind-energy-storage coupled zero-carbon CHP system. Utility Model Content

[0003] To address the problem of low energy utilization in existing multi-energy coupling systems in industrial parks, this invention proposes a zero-carbon combined cooling, heating, and power (CCHP) system that couples geothermal, solar, wind, and energy storage energy. The aim is to achieve green energy utilization in industrial parks by utilizing renewable energy sources, improve overall energy efficiency, and realize efficient energy synergy.

[0004] The technical solution adopted by this utility model is: a geothermal-solar-wind-energy-storage coupled zero-carbon combined cooling, heating and power system, which includes four subsystems: a renewable energy power generation system, an electrochemical energy storage system, a shallow geothermal energy utilization system, and a dual cooling and heating energy storage system. The energy supply and demand distribution among the four subsystems is realized through an energy management system.

[0005] The output end of the renewable energy power generation system is connected to the power input end of the electrochemical energy storage system, the shallow geothermal energy utilization system, the cold and hot dual energy storage system, and the loads in the park buildings, respectively, to provide electricity to the shallow geothermal energy utilization system, the cold and hot dual energy storage system, and the loads in the park buildings. The electrochemical energy storage system stores the excess electricity of the renewable energy power generation system.

[0006] The output of the electrochemical energy storage system is connected to the power input of the shallow geothermal energy utilization system, the cold and hot dual energy storage system, and the loads in the park buildings.

[0007] Furthermore, the renewable energy power generation system includes distributed photovoltaic modules, small wind turbine generators, inverters, and a power grid. The output terminals of the distributed photovoltaic modules and small wind turbine generators output AC power through the inverters. The electrochemical energy storage system is bidirectionally connected to the power grid. The output terminal of the power grid is connected to the shallow geothermal energy utilization system, the cold and hot dual energy storage system, and the power input terminals of the loads in the park buildings.

[0008] Furthermore, the shallow geothermal energy utilization system consists of a group of buried wells, a ground source side water pump, a ground source heat pump unit, and a user side water pump. The group of buried wells is connected to the ground source heat pump unit through a ground source side outlet pipe and a ground source side return pipe. The ground source heat pump unit is also connected to the inlet and outlet of the building through a user side outlet pipe and a user side return pipe. A ground source side water pump is installed on the ground source side outlet pipe, and a user side water pump is installed on the user side outlet pipe.

[0009] Furthermore, the dual-energy storage system includes an electric boiler, a thermal storage tank, a thermal storage circulating water pump, a chiller, a cold storage tank, and a cold storage circulating water pump. The electric boiler is connected to the thermal storage tank via inlet and outlet pipes. The thermal storage tank is connected to the user-side outlet water pipe and the user-side return water pipe via inlet and outlet pipes. The chiller is connected to the cold storage tank via inlet and outlet pipes. The cold storage tank is connected to the user-side outlet water pipe and the user-side return water pipe via inlet and outlet pipes. A thermal storage circulating water pump is installed on the return water pipe connecting the electric boiler and the thermal storage tank, and a cold storage circulating water pump is installed on the return water pipe connecting the chiller and the cold storage tank.

[0010] Furthermore, the energy management system communicates with distributed photovoltaic modules, small wind turbine generators, electrochemical energy storage systems, the power grid, ground source heat pump units, electric boilers, refrigeration units, and the electricity meters of each user within the building.

[0011] Furthermore, the underground pipe well group includes multiple underground buried pipe heat exchangers and circulation pipelines.

[0012] The advantages of this utility model compared to the prior art are as follows: This utility model provides clean electricity to the park by installing distributed solar photovoltaic panels on rooftops, parking lots, and other areas, and constructing small-scale wind power generation facilities; it achieves clean combined cooling and heating supply in the park by extracting shallow underground geothermal energy resources; it constructs a "peak shaving and valley filling" power consumption mode through an electrochemical energy storage system, effectively reducing peak load on the power grid, promoting stable power use, and improving energy efficiency; through a dual cooling and heating storage system, during the summer cooling period, during off-peak hours, electric cooling equipment converts electrical energy into cooling energy and stores it in low-temperature chilled water; during the winter heating period, during off-peak hours, electric boilers convert electrical energy into heat energy and store it in hot water. The system releases cooling or heating energy as needed, achieving efficient energy utilization and energy conservation and emission reduction. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of the structure of the system of this utility model;

[0015] In the diagram: 1 is a distributed photovoltaic module, 2 is a small wind turbine generator, 3 is an inverter, 4 is an electrochemical energy storage device, 5 is the State Grid, 6 is a group of underground pipe wells, 7 is a ground source side water pump, 8 is a ground source heat pump unit, 9 is a user side water pump, 10 is an electric boiler, 11 is a thermal storage tank, 12 is a thermal storage circulating water pump, 13 is a refrigeration unit, 14 is a cold storage tank, 15 is a cold storage circulating water pump, 16 is a building, and 17 is an energy management system. Detailed Implementation

[0016] like Figure 1 As shown, this utility model provides a geothermal-solar-wind-energy-storage coupled zero-carbon combined cooling, heating and power (CCHP) system, which is composed of multiple subsystems coupled together, including a renewable energy power generation system, an electrochemical energy storage system, a shallow geothermal energy utilization system, a dual cooling and heating energy storage system, and an energy management system. The renewable energy power generation system consists of distributed photovoltaic modules 1, small wind turbine generators 2, inverters 3, and the State Grid 5. The output terminals of the distributed photovoltaic modules 1 and the small wind turbine generators 3 output AC power through the inverter 3. The electrochemical energy storage system is bidirectionally connected to the State Grid 5. The output terminal of the State Grid 5 is connected to the power input terminals of the shallow geothermal energy utilization system, the dual cooling and heating energy storage system, and the loads in the park buildings.

[0017] Photovoltaic and wind power generation prioritizes supplying electricity to the park's loads. Surplus electricity is stored in the electrochemical energy storage system and sold to the grid. The electrochemical energy storage system discharges to the park's loads during periods of insufficient power generation or peak electricity prices. The electrochemical energy storage system mainly includes electrochemical energy storage equipment, which is used to smooth out fluctuations in wind and solar power generation and discharge during periods of insufficient power generation or peak electricity prices to achieve peak shaving and valley filling.

[0018] The shallow geothermal energy utilization system mainly consists of a group of buried pipe wells 6, a ground source side water pump 7, a ground source heat pump unit 8, and a user side water pump 9. The ground source heat pump unit 8 is also connected to the inlet and outlet of the building 16 through user side outlet and return water pipes. The ground source side water pump 7 is installed on the ground source side outlet pipe, and the user side water pump 9 is installed on the user side outlet pipe. The shallow geothermal energy stored in the soil is extracted through the underground buried pipe heat exchanger, and the ground source heat pump is used to provide combined cooling and heating for the building 16.

[0019] The main equipment of the dual-energy storage system consists of an electric boiler 10, a thermal storage tank 11, a thermal storage circulating water pump 12, a chiller 13, a cold storage tank 14, and a cold storage circulating water pump 15. The thermal storage tank 11 is connected to the user's outlet and return water pipes via inlet and outlet pipes. The chiller 13 is connected to the cold storage tank 14 via inlet and outlet pipes. The cold storage tank 14 is connected to the user's outlet and return water pipes via inlet and outlet pipes. The thermal storage circulating water pump 12 is installed on the return water pipe connecting the electric boiler 10 and the thermal storage tank 11, and the cold storage circulating water pump 15 is installed on the return water pipe connecting the chiller 13 and the cold storage tank 14. The dual-energy storage system utilizes surplus or off-peak electricity at night to produce hot / cold water, and releases heat and cooling during the day to reduce peak loads and provide peak-shaving for the building's combined cooling and heating system.

[0020] The Energy Management System (EMS) 17 receives photovoltaic power output, wind power output, energy storage SOC, and building heating and cooling load demands, issues dispatch instructions, dispatches wind, solar, energy storage, heating and cooling energy storage, and ground source heat pumps, optimizes energy supply and demand matching, prioritizes the use of renewable energy, and improves the economic efficiency of energy utilization.

[0021] Specifically, distributed photovoltaic (PV) modules 1 can be installed in areas with strong sunlight, such as rooftops and parking lots within the park. PV modules 1 and small wind turbine generators 2 convert DC power to AC power via inverters 3. The converted AC power prioritizes supplying power to the ground-source water pump 7, ground-source heat pump unit 8, user-side water pump 9, electric boiler 10, thermal storage circulating water pump 12, chiller unit 13, cold storage circulating water pump 15, and loads within buildings 16. Excess power is stored in the park's electrochemical energy storage device 4 and sold to the power grid 5. The electrochemical energy storage device 4 and the power grid 5 are also electrically connected to the ground-source water pump 7, ground-source heat pump unit 8, user-side water pump 9, electric boiler 10, thermal storage circulating water pump 12, chiller unit 13, cold storage circulating water pump 15, and loads within buildings 16. The electrochemical energy storage device 4 supplies power to these loads when the renewable energy storage power generation system's output is insufficient or during peak electricity prices. The power grid 5 can supply power to these loads when both the renewable energy storage power generation system and the electrochemical energy storage device 4 are generating insufficient power.

[0022] The underground pipe well group 6 is equipped with an underground pipe heat exchanger. The circulating water directly exchanges heat with the soil through the pipe wall. Then, the circulating water is connected to the ground source heat pump host 8 through the ground source side outlet pipe and the ground source side return pipe. A ground source side water pump 7 is installed on the ground source side outlet pipe to pump the hot water in the underground well into the ground source heat pump host 8. The ground source heat pump host 8 is also connected to the water inlet and outlet in the building 16 through the user side outlet pipe and the user side return pipe. A user side water pump 9 is installed on the user side outlet pipe to pump the hot water into the user end.

[0023] The electric boiler 10 is connected to the heat storage tank 11 through inlet and outlet pipes. The heat storage tank 11 is connected to the user-side water outlet pipe and the user-side water return pipe through inlet and outlet pipes. The refrigeration unit 13 is connected to the cold storage tank 14 through inlet and outlet pipes. The cold storage tank 14 is connected to the user-side water outlet pipe and the user-side water return pipe through inlet and outlet pipes. A heat storage circulating water pump 12 is installed on the water return pipe connecting the electric boiler 10 and the heat storage tank 11, and a cold storage circulating water pump 15 is installed on the water return pipe connecting the refrigeration unit 13 and the cold storage tank 14.

[0024] The energy management system 17 communicates with the distributed photovoltaic module 1, the small wind turbine generator 2, the electrochemical energy storage device 4, the power grid 5, the ground source heat pump host 8, the electric boiler 10, the refrigeration host 13, and the electricity meters of each user in the building 16, which can optimize the matching of energy supply and demand and give priority to the use of renewable energy.

[0025] The zero-carbon energy supply system for industrial parks proposed in this utility model can realize combined cooling, heating and electricity supply in industrial parks, thereby achieving green and efficient energy supply for industrial parks.

[0026] Regarding the specific structure of this utility model, it should be noted that the connection relationships between the various component modules adopted in this utility model are definite and achievable. Except as specifically described in the embodiments, their specific connection relationships can bring about corresponding technical effects and solve the technical problems proposed by this utility model without relying on the execution of corresponding software programs. The models of the components, modules, and specific components appearing in this utility model, the connection methods between them, and the conventional usage methods and expected technical effects brought about by the above-mentioned technical features, unless specifically described, are all publicly disclosed content in patents, journal articles, technical manuals, technical dictionaries, and textbooks that can be obtained by those skilled in the art before the application date, or belong to conventional technology, common knowledge, and other existing technologies in this field. There is no need to elaborate, which makes the technical solution provided in this case clear, complete, and achievable, and can reproduce or obtain corresponding physical products based on this technical means.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A geothermal energy-solar energy-wind energy-energy storage coupled zero-carbon cold heat and power triple-combined system, characterized in that: It includes four subsystems: a renewable energy power generation system, an electrochemical energy storage system, a shallow geothermal energy utilization system, and a cold and hot dual energy storage system. The energy supply and demand distribution among the four subsystems is achieved through an energy management system. ​ The output end of the renewable energy power generation system is connected to the power input end of the electrochemical energy storage system, the shallow geothermal energy utilization system, the cold and hot dual energy storage system, and the loads in the park buildings, respectively, to provide electricity to the shallow geothermal energy utilization system, the cold and hot dual energy storage system, and the loads in the park buildings. The electrochemical energy storage system stores the excess electricity of the renewable energy power generation system. The output of the electrochemical energy storage system is connected to the power input of the shallow geothermal energy utilization system, the cold and hot dual energy storage system, and the loads in the park buildings.

2. The geothermal energy-solar energy-wind energy-energy storage coupled zero-carbon cooling, heating and power triple-generation system according to claim 1, characterized in that: The renewable energy power generation system includes distributed photovoltaic modules (1), small wind turbine generators (2), inverters (3) and power grid (5). The output terminals of distributed photovoltaic modules (1) and small wind turbine generators (2) output AC power through inverters (3). The electrochemical energy storage system is bidirectionally connected to the power grid (5). The output terminals of the power grid (5) are respectively connected to the shallow geothermal energy utilization system, the cold and hot dual energy storage system and the power input terminals of the loads in the park buildings.

3. The geothermal energy-solar energy-wind energy-energy storage coupled zero-carbon cooling, heating and power triple-generation system according to claim 2, characterized in that: The shallow geothermal energy utilization system consists of a group of buried pipe wells (6), a ground source side water pump (7), a ground source heat pump main unit (8), and a user side water pump (9). The group of buried pipe wells (6) is connected to the ground source heat pump main unit (8) through a ground source side outlet pipe and a ground source side return pipe. The ground source heat pump main unit (8) is also connected to the inlet and outlet of the building (16) through a user side outlet pipe and a user side return pipe. A ground source side water pump (7) is installed on the ground source side outlet pipe, and a user side water pump (9) is installed on the user side outlet pipe.

4. A geothermal-solar-wind-energy-storage coupled zero-carbon combined cooling, heating and power system according to claim 3, characterized in that: The dual energy storage system includes an electric boiler (10), a thermal storage tank (11), a thermal storage circulating water pump (12), a refrigeration unit (13), a cold storage tank (14), and a cold storage circulating water pump (15). The electric boiler (10) is connected to the thermal storage tank (11) through inlet and outlet pipes. The thermal storage tank (11) is connected to the user-side outlet water pipe and the user-side return water pipe through inlet and outlet pipes. The refrigeration unit (13) is connected to the cold storage tank (14) through inlet and outlet pipes. The cold storage tank (14) is connected to the user-side outlet water pipe and the user-side return water pipe through inlet and outlet pipes. The thermal storage circulating water pump (12) is installed on the return water pipe connecting the electric boiler (10) and the thermal storage tank (11), and the cold storage circulating water pump (15) is installed on the return water pipe connecting the refrigeration unit (13) and the cold storage tank (14).

5. A geothermal-solar-wind-energy-storage coupled zero-carbon combined cooling, heating and power system according to claim 4, characterized in that: The energy management system (17) communicates with the distributed photovoltaic modules (1), small wind turbine generators (2), electrochemical energy storage system, power grid (5), ground source heat pump host (8), electric boiler (10), refrigeration host (13) and the electricity meters of each user in the building (16).

6. A geothermal-solar-wind-energy-storage coupled zero-carbon combined cooling, heating and power system according to claim 3, characterized in that: The underground pipe well group (6) includes multiple underground buried pipe heat exchangers and circulation pipelines.

Images