CN211575590U - Energy storage system - Google Patents
Energy storage system Download PDFInfo
- Publication number
- CN211575590U CN211575590U CN201922343211.6U CN201922343211U CN211575590U CN 211575590 U CN211575590 U CN 211575590U CN 201922343211 U CN201922343211 U CN 201922343211U CN 211575590 U CN211575590 U CN 211575590U
- Authority
- CN
- China
- Prior art keywords
- energy
- heat
- storage
- cold
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The utility model discloses an energy storage system, this system include heat pump heating refrigeration energy storage return circuit, cold and hot heat engine power generation return circuit, indirect heat-retaining return circuit and indirect cold storage return circuit. A power station valley (low price) electrically driven heat pump heating and refrigerating circulation loop is adopted to prepare high-temperature heat energy and low-temperature cold energy, the high-temperature heat energy and the low-temperature cold energy are exchanged to an indirect heat storage loop and an indirect cold storage loop through a heat exchanger, and the heat energy and the low-temperature cold energy are stored in a heat storage unit and a cold storage unit; in the electricity consumption peak, the gas in the cold and heat energy heat engine power generation loop exchanges heat with the indirect heat storage loop and the indirect cold storage loop through the heat exchanger, absorbs the stored high-temperature heat energy and low-temperature cold energy, and drives the generator to generate electricity through heat engine circulation. The utility model discloses an energy storage system has simple structure, with low costs, energy storage density is high, efficient, be applicable to electric wire netting peak shaver and various renewable energy power stations, does not produce advantages such as greenhouse gas.
Description
Technical Field
The utility model belongs to the technical field of energy storage, a energy storage system is related to, especially relate to an energy storage system, be an energy storage system based on heat pump circulation stored energy and utilize the stored energy to produce the electric energy.
Background
In recent years, renewable energy is gradually becoming an important source of newly added electric power, and the structure and the operation mode of a power grid are greatly changed. With the increasing popularization of renewable energy sources (wind energy, solar energy and the like) and the urgent needs of peak shaving, grid reliability improvement and electric energy quality improvement of a power grid, the importance of a power energy storage system is increasingly highlighted. The energy storage is an important component and a key supporting technology of a smart power grid, a renewable energy high-ratio energy system and an intelligent energy source of 'internet +' (hereinafter referred to as energy internet). The energy storage can provide various services such as peak shaving, frequency modulation, standby, black start, demand response support and the like for the operation of a power grid, and is an important means for improving the flexibility, the economy and the safety of a traditional power system; the energy storage can remarkably improve the consumption level of renewable energy sources such as wind, light and the like, support distributed power and a microgrid and is a key technology for promoting the replacement of main energy sources from fossil energy sources to renewable energy sources; the energy storage can promote the open sharing and flexible transaction of energy production and consumption, realize the multi-energy cooperation, and is a core foundation for constructing an energy internet, promoting the reformation of an electric power system and promoting the new state development of energy.
The existing power energy storage technology comprises water pumping energy storage, compressed air energy storage, storage battery energy storage, superconducting magnetic energy, flywheel energy storage, super capacitor and the like. The energy storage of China presents a good situation of multivariate development: the pumped storage develops rapidly; the research and development of energy storage technologies such as compressed air energy storage, flywheel energy storage, superconducting energy storage and super capacitor, lead storage battery, lithium ion battery, sodium-sulfur battery, flow battery and the like are accelerated; the heat storage, cold storage and hydrogen storage technologies have also made certain progress. The physical methods of water pumping energy storage, heat storage energy storage and compressed air energy storage are suitable for large-scale commercial application due to low cost and large energy storage capacity, and account for about 99.5% of the total amount of energy stored in the world.
When the power system is in a valley load, the energy storage system of the pumping power station enables the motor to drive the water pump to pump water in the low water reservoir to the high water reservoir through the pipeline so as to consume a part of electric energy. When the peak load comes, the water in the high reservoir makes the water pump and the motor run reversely through the pipeline to become a water turbine and a generator to generate electric energy to supply users, thereby playing the roles of peak clipping and valley filling. The energy storage system of the pumping power station has the advantages of being mature and reliable in technology, high in efficiency (70 percent), large in energy storage capacity and the like, and is widely used at present. However, the energy storage system of the pumping power station needs special geographical conditions to build two reservoirs and dams, the construction period is long (generally about 7-15 years), and the initial investment is huge. What is more troublesome is that large-scale reservoirs are built to submerge vegetation in large areas even in cities, so that ecological and immigration problems are caused, and therefore building of energy storage systems of water pumping power stations is more and more limited.
In the electricity utilization valley of the traditional compressed air energy storage system, air is compressed and stored in an air storage chamber, so that electric energy is converted into internal energy of the air to be stored; during the peak of electricity utilization, high-pressure air is released from the air storage chamber, enters the combustion chamber of the gas turbine to be combusted with fuel, and then drives the turbine to generate electricity. The compressed air energy storage system has the advantages of large energy storage capacity, long energy storage period, high efficiency (50-70%), relatively small unit investment and the like. However, the energy storage density of the compressed air energy storage technology is low, and the difficulty is that a proper place for storing compressed air is needed, such as a sealed cave or an abandoned mine. Moreover, the compressed air energy storage system still relies on the combustion of fossil fuel to provide a heat source, so that the threat of gradual exhaustion and price rise of the fossil fuel is faced on one hand, and pollutants such as nitride, sulfide and carbon dioxide are still generated by the combustion of the compressed air energy storage system on the other hand, and the compressed air energy storage system does not meet the development requirements of green (zero emission) and renewable energy sources.
In order to solve the main problems faced by the conventional compressed air energy storage system, in recent years, researchers at home and abroad respectively develop the research on an advanced adiabatic compressed air energy storage system (AACAES), a ground compressed air energy storage system (SVCAES), a compressed air energy storage system (AACAES) with heat recovery and an air-steam combined cycle compressed air energy storage system (CASH), and the like, so that the compressed air energy storage system can basically avoid burning fossil fuels, but the energy density of the compressed air energy storage system is still very low, and a large-scale gas storage chamber is needed.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned shortcoming and the deficiency that prior art exists, the utility model aims at providing an energy storage system, this system includes heat pump heating refrigeration energy storage return circuit, cold and hot energy heat engine electricity generation return circuit, indirect heat-retaining return circuit and indirect cold-storing return circuit. A power station valley (low price) electrically driven heat pump heating and refrigerating circulation loop is adopted to prepare high-temperature heat energy and low-temperature cold energy, the heat energy and the cold energy are exchanged to an indirect heat storage loop and an indirect cold storage loop through a heat exchanger and are stored in a heat storage unit and a cold storage unit; in the electricity consumption peak, the gas in the cold and heat energy heat engine power generation loop exchanges heat with the indirect heat storage loop and the indirect cold storage loop through the heat exchanger, absorbs the stored high-temperature heat energy and low-temperature cold energy, and drives the generator to generate electricity through heat engine circulation. The utility model discloses a based on indirect cold heat-retaining of storing up have simple structure, with low costs, energy storage density is high, efficient, be applicable to electric wire netting peak shaver and various renewable energy power stations, do not produce advantages such as greenhouse gas.
In order to achieve the above purpose, the technical solution of the utility model is that:
an energy storage system comprises an electric drive unit, an energy storage compressor unit, an energy storage expander unit, a cold storage loop heat exchanger, a low-temperature cold storage unit, a low-temperature fan, a heat storage loop heat exchanger, a high-temperature fan, a high-temperature heat storage unit, a first high-pressure heat exchanger, a second high-pressure heat exchanger, an energy release compressor unit, an energy release expander unit, a power generation unit, a first low-pressure heat exchanger, a second low-pressure heat exchanger and first to fourth three-way valves,
wherein the content of the first and second substances,
the electric drive unit is in driving connection with the energy storage compressor unit, the energy storage compressor unit is in transmission connection with the energy storage expansion unit, the energy release compressor unit is in transmission connection with the energy release expansion unit, and the energy release expansion unit is in driving connection with the power generation unit; the first to fourth three-way valves comprise three ports, namely a first port, a second port and a third port;
it is characterized in that the preparation method is characterized in that,
the system is arranged into a heat pump heating and refrigerating energy storage loop, a cold and heat energy heat engine power generation loop, an indirect heat storage loop and an indirect cold storage loop, wherein,
-in the heat pump heating and cooling energy storage circuit,
an exhaust port of the energy storage compressor unit is communicated with an air inlet of the energy storage expansion unit through a first connector and a second connector of the three-way valve I, a hot side of the heat storage loop heat exchanger, a first connector and a second connector of the three-way valve II and a hot side of the first high-pressure heat exchanger in sequence through pipelines,
an air outlet of the energy storage expansion unit is communicated with an air inlet of the energy storage compressor unit through a first connector and a second connector of the three-way valve III, a cold side of the cold storage loop heat exchanger, a first connector and a second connector of the three-way valve IV and a cold side of the first low-pressure heat exchanger in sequence through pipelines;
-in said cold-thermal energy heat engine power generation circuit,
an air outlet of the energy release compressor unit is communicated with an air inlet of the energy release expansion unit through a hot side of the second high-pressure heat exchanger, a third connector and a first connector of the three-way valve II, a hot side of the heat storage loop heat exchanger, a second connector and a third connector of the three-way valve I in sequence through pipelines,
an air outlet of the energy release expansion unit is communicated with an air inlet of the energy release compressor unit through a cold side of the second low-pressure heat exchanger, a third connector and a first connector of a three-way valve IV, a cold side of a cold storage loop heat exchanger, a second connector and a third connector of a three-way valve III in sequence through pipelines;
-in the indirect heat storage loop, the cold side of the heat storage loop heat exchanger, the high temperature fan and the high temperature heat storage unit are connected in sequence through pipelines to form a closed loop;
in the indirect cold storage loop, a hot side of the cold storage loop heat exchanger, a low-temperature fan and a low-temperature cold storage unit are connected in sequence through pipelines to form a closed loop.
Preferably, in a valley period of power consumption, the system utilizes the heat pump heating and refrigerating circulation loop to prepare high-temperature heat energy and low-temperature cold energy, and the high-temperature heat energy and the low-temperature cold energy are stored in the high-temperature heat storage unit and the low-temperature heat storage unit through the indirect heat storage and heat storage loop and the indirect cold storage loop respectively.
Further, in a low-ebb period of power utilization, the energy storage compressor unit and the energy storage expansion unit are started, and the energy release compressor unit and the energy release expansion unit are closed; the three-way valve I is controlled to enable a first interface to be communicated with a second interface; controlling the three-way valve II to enable a first interface of the three-way valve II to be communicated with a second interface; controlling the three-way valve IV to enable a first interface of the three-way valve IV to be communicated with a second interface; and controlling the three-way valve III to enable the first interface to be communicated with the second interface.
Further, in a low-power consumption valley period, in the heat pump heating and refrigerating circulation loop, the electric driving unit drives the energy storage compressor unit to compress the gas working medium at normal temperature and low pressure to a high-temperature high-pressure state; the temperature of the high-temperature high-pressure gas working medium is reduced to normal temperature through the heat storage loop heat exchanger, and high-temperature heat energy is stored in a heat storage medium of the high-temperature heat storage unit through the indirect heat storage loop; the temperature of the gas working medium at normal temperature and high pressure is reduced to be near the room temperature through the hot side of the first high-pressure heat exchanger; the gas working medium with the room temperature and the high pressure further passes through the energy storage expansion unit to reach the low temperature and the low pressure; the low-temperature low-pressure gas working medium passes through the cold storage loop heat exchanger, then the temperature is raised to normal temperature, and low-temperature cold energy is stored in a cold storage medium of the low-temperature cold storage unit through the indirect cold storage loop; after passing through the first low-pressure heat exchanger, the temperature of the gas working medium at normal temperature and low pressure is raised to be near the room temperature; and the gas working medium with the room temperature and the low pressure reenters the inlet of the heat pump energy storage compressor unit to participate in heat pump circulation, and the circulation is repeated, so that high-temperature heat energy and low-temperature cold energy are continuously stored in the heat storage medium of the high-temperature heat storage unit and the cold storage medium of the low-temperature cold storage unit.
Preferably, during the peak period of power utilization, the system utilizes the high-temperature heat energy and the low-temperature cold energy stored in the high-temperature heat storage unit and the low-temperature cold storage unit and drives the heat engine to generate power circularly by means of the cold-heat energy heat engine power generation loop.
Further, in the peak period of power utilization, starting the energy release compressor unit and the energy release expansion unit, and closing the energy storage compressor unit and the energy storage expansion unit; the three-way valve I is controlled to enable the second port to be communicated with the third port; controlling the three-way valve II to enable the first port to be communicated with the third port; controlling the three-way valve IV to enable a first interface of the three-way valve IV to be communicated with a third interface; and controlling the three-way valve to enable the second interface to be communicated with the third interface.
Further, in the peak period of power consumption, the gas working medium at normal temperature and low pressure passes through the cold storage loop heat exchanger, absorbs the low-temperature cold energy stored in the low-temperature cold storage unit, then the temperature is reduced to low temperature and low pressure, and the gas working medium at low temperature and low pressure is compressed to a normal temperature and high pressure state through the energy release compressor unit; the temperature of the gas working medium at normal temperature and high pressure is reduced to be near the room temperature through the hot side of the second high-pressure heat exchanger; the gas working medium with room temperature and high pressure passes through the heat storage loop heat exchanger, absorbs the high-temperature heat energy stored in the high-temperature heat storage unit, and then the temperature is raised to high temperature; the high-temperature and high-pressure gas working medium further passes through the energy-releasing expansion unit to reach normal temperature and low pressure; the normal-temperature low-pressure gas working medium passes through the second low-pressure heat exchanger and then is cooled to be near the room temperature; the energy-releasing expansion unit is in driving connection with the power generation unit, the energy-releasing compressor unit is in driving connection with the energy-releasing expansion unit, the circulation is repeated, and the stored high-temperature heat energy and the stored low-temperature cold energy are continuously converted into electric energy through the heat engine circulation to be output.
Preferably, the indirect heat storage loop is in a low-power consumption valley period, the high-temperature fan drives a gas working medium to circularly flow in the loop, the gas working medium is heated when passing through the heat storage loop heat exchanger and is cooled when passing through the high-temperature heat storage unit, and high-temperature heat energy is stored in a heat storage medium in the high-temperature heat storage unit; the indirect heat storage loop is in an electricity utilization peak period, the high-temperature fan runs reversely to drive a gas working medium to flow in the loop in a circulating mode, the gas working medium is heated when passing through the high-temperature heat storage unit and is cooled when passing through the heat storage loop heat exchanger, and high-temperature heat energy stored in the high-temperature heat storage unit is exchanged to the cold and heat energy heat engine working loop.
Preferably, the indirect cold storage loop is in a power consumption valley period, the low-temperature fan drives a gas working medium to circularly flow in the loop, the gas working medium is cooled when passing through the cold storage loop heat exchanger and heated when passing through the low-temperature cold storage unit, and low-temperature cold energy is stored into a cold storage medium in the low-temperature cold storage unit; the indirect cold storage loop is in an electricity utilization peak period, the low-temperature fan runs reversely to drive a gas working medium to flow in the loop in a circulating mode, the gas working medium is cooled when passing through the low-temperature cold storage unit and heated when passing through the cold storage loop heat exchanger, and low-temperature cold energy stored in the low-temperature cold storage unit is exchanged into the cold and heat energy heat engine working loop.
Preferably, the electric driving unit is a driving motor or a wind turbine; when the electric drive unit is a drive motor, one or more of conventional power station valley electricity, nuclear power, wind power, solar power generation, hydroelectric power or tidal power generation is used as a power supply.
Preferably, the total pressure ratio of the energy storage compressor unit or the energy release compressor unit is between 5 and 40; when the compressor unit comprises a plurality of compressors, the compressors are in a coaxial series connection mode or a split-shaft parallel connection mode; in the parallel connection mode, each branch shaft is movably connected with the main driving shaft.
Preferably, the total expansion ratio of the energy storage expansion unit or the energy release expansion unit is between 5 and 40; when the expansion machine set comprises a plurality of expansion machines, the plurality of expansion machines are in a coaxial series connection mode or a split-shaft parallel connection mode; in the parallel connection mode, each branch shaft is movably connected with the main driving shaft.
Preferably, the high-temperature heat storage unit and the low-temperature cold storage unit are cylinders, spheres or cuboids. The heat storage medium and the cold storage medium are made of one or a combination of at least two of rock, sand and stone, metal particles, solid bricks and the like.
Preferably, in the energy storage system, the gas working medium in the heat pump heating and refrigerating energy storage loop and the cold and heat energy heat engine power generation loop is one or a mixture of at least two of argon, helium, hydrogen, nitrogen, oxygen and air.
Preferably, in the energy storage system, the gas working medium in the indirect heat storage loop and the indirect cold storage loop is one or a mixture of at least two of argon, helium, hydrogen, nitrogen, oxygen and air.
Compared with the prior art, the energy storage system adopts the power station valley (low price) electrically driven heat pump heating and refrigerating circulation loop to prepare high-temperature heat energy and low-temperature cold energy, and the high-temperature heat energy and the low-temperature cold energy are stored in the heat storage and cold storage unit through the indirect heat exchange loop; at the peak of electricity utilization, the cold energy in the heat storage and cold storage unit exchanges heat energy and cold energy to the energy release power generation loop through the indirect heat exchange loop and the indirect heat storage and cold storage loop heat exchanger, and the generator is driven to generate power through heat engine circulation. The utility model discloses an energy storage system has simple structure, with low costs, energy storage density is high, efficient, be applicable to electric wire netting peak shaver and various renewable energy power stations, does not produce advantages such as greenhouse gas.
Drawings
Fig. 1 is a schematic view of the energy storage system of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the utility model discloses an energy storage system comprises electric drive unit 1, energy storage compressor unit 2, energy storage expander unit 3, cold storage loop heat exchanger 4, low temperature cold-storage unit 5, low temperature fan 6, heat-retaining loop heat exchanger 7, high temperature fan 8, high temperature heat-retaining unit 9, first high pressure heat exchanger 10, second high pressure heat exchanger 11, energy release compressor unit 12, energy release expander unit 13, power generation unit 14, first low pressure heat exchanger 15, second low pressure heat exchanger 16, first to fourth three way valve 17, 18, 19, 22, and a plurality of subassemblies such as many pipelines 20, 21, 23 ~ 40. The first to fourth three-way valves 17, 18, 19 and 22 respectively comprise three ports, namely a first port, a second port and a third port; the energy storage compressor unit 2 is in driving connection with the electric driving unit 1, the energy releasing expansion unit 13 is in driving connection with the power generation unit 14, the energy storage compressor unit 2 is in driving connection with the energy storage expansion unit 3, and the energy releasing compressor unit is in driving connection with the energy releasing expansion unit.
The utility model discloses an above-mentioned energy storage system who comprises a plurality of subassemblies unit can divide into four return circuits such as heat pump heating refrigeration energy storage circuit, cold and hot energy heat engine power generation return circuit, indirect heat-retaining return circuit and indirect cold-storage return circuit.
Referring to fig. 1, in the energy storage system of the present invention, the heat pump heating and refrigerating energy storage loop comprises an energy storage compressor unit 2, an energy storage expander unit 3, a heat storage loop heat exchanger 7, a first high pressure heat exchanger 10, a second high pressure heat exchanger 11, a cold storage loop heat exchanger 4, a first low pressure heat exchanger 15, and a second low pressure heat exchanger 16, wherein the heat pump heating and refrigerating energy storage loop is filled with a heat pump circulating gas working medium,
an exhaust port of the energy storage compressor unit 2 is communicated with an air inlet of the energy storage expansion unit 3 through a first connector and a second connector of the three-way valve I22, a hot side of the heat storage loop heat exchanger 7, a first connector and a second connector of the three-way valve II 19 and a hot side of the first high-pressure heat exchanger 10 in sequence through pipelines,
and an exhaust port of the energy storage expansion unit 3 is communicated with an air inlet of the energy storage compressor unit 2 through a first connector and a second connector of the three-way valve III 17, a cold side of the cold storage loop heat exchanger 4, a first connector and a second connector of the three-way valve IV 18 and a cold side of the first low-pressure heat exchanger 15 in sequence through pipelines.
Referring to fig. 1, in the energy storage system of the present invention, the cold and heat energy thermal engine power generation circuit includes an energy release compressor unit 12, a heat storage loop heat exchanger 7, a second high pressure heat exchanger 11, a cold storage loop heat exchanger 4, an energy release expander unit 13, and a second low pressure heat exchanger 16, and the cold and heat energy thermal engine power generation circuit is filled with a circulating gas working medium, wherein,
an exhaust port of the energy release compressor unit 12 is communicated with an air inlet of the energy release expansion unit 13 through a hot side of the second high-pressure heat exchanger 11, a third interface and a first interface of a three-way valve II 19, a hot side of the heat storage loop heat exchanger 7, a second interface and a third interface of a three-way valve I22 in sequence through pipelines,
and an exhaust port of the energy release expansion unit 13 is communicated with an air inlet of the energy release compressor unit 12 through a cold side of the second low-pressure heat exchanger 16, a third connector and a first connector of a three-way valve IV 18, a cold side of the cold storage loop heat exchanger 4, a second connector and a third connector of a three-way valve III 17 in sequence through pipelines.
Referring to fig. 1, in the energy storage system of the present invention, the heat storage loop heat exchanger 7, the high temperature fan 8, the high temperature heat storage unit 9 and the pipelines 39 and 40 constitute an indirect heat storage loop. The cold side of the heat storage loop heat exchanger 7, the high-temperature fan 8 and the high-temperature heat storage unit 9 are sequentially connected through pipelines to form a closed loop.
Referring to fig. 1, in the energy storage system of the present invention, the cold storage loop heat exchanger 4, the low temperature fan 6, the low temperature cold storage unit 5 and the pipelines 37 and 38 constitute an indirect cold storage loop. And the hot side of the cold storage loop heat exchanger 4, the low-temperature fan 6 and the low-temperature cold storage unit 5 are sequentially connected through pipelines to form a closed loop.
Referring to fig. 1, when the energy storage system of the present invention stores energy, the three-way valve i 22 is controlled to communicate the first interface with the second interface, so that the pipeline 20 is communicated with the pipeline 23, and the pipeline 34 is closed; controlling the three-way valve II 19 to enable the first port to be communicated with the second port, enabling the pipeline 24 to be communicated with the pipeline 25, and stopping the pipeline 33; controlling the three-way valve IV 18 to enable the first port to be communicated with the second port, enabling the pipeline 29 to be communicated with the pipeline 30, and stopping the pipeline 36; and controlling the three-way valve III 17 to enable the first port to be communicated with the second port, so that the pipeline 27 is communicated with the pipeline 28, and the pipeline 31 is cut off. Through the operation of the valves, the energy storage compressor unit 2, the heat storage loop heat exchanger 7, the high-pressure heat exchanger 10, the energy storage expansion unit 3, the cold storage loop heat exchanger 4, the low-pressure heat exchanger 15 and the pipelines 20, 23-30 and 21 form a heat pump heating and refrigerating loop. The electric drive unit 1 is fixedly connected with a common transmission shaft of the heat pump cycle energy storage compressor unit 2 and the heat pump cycle energy storage expander unit 3.
When energy is released and power is generated, the three-way valve I22 is controlled to enable the second interface to be communicated with the third interface, so that the pipeline 23 is communicated with the pipeline 34, and the pipeline 20 is cut off; controlling the three-way valve II 19 to enable the first port to be communicated with the third port, enabling the pipeline 24 to be communicated with the pipeline 33, and stopping the pipeline 25; controlling the three-way valve IV 18 to enable the first port and the third port of the three-way valve IV to be communicated, enabling the pipeline 29 to be communicated with the pipeline 36, and stopping the pipeline 30; controlling the three-way valve 17 to enable the second port to be communicated with the third port, so that the pipeline 28 is communicated with the pipeline 31, and the pipeline 27 is cut off; when releasing energy and generating electricity, the energy releasing compressor unit 12, the high-pressure heat exchanger 11, the heat storage loop heat exchanger 7, the energy releasing expansion unit 13, the low-pressure heat exchanger 16, the cold storage loop heat exchanger 4 and the pipelines 28, 29, 31, 32, 33, 24, 23, 34, 35 and 36 form a heat engine energy releasing loop. The power generation unit 14 is fixedly connected with a common transmission shaft of the heat pump cycle energy-releasing compressor unit 12 and the heat pump cycle energy-releasing expander unit 13.
In the valley period of power utilization, the electric drive unit 1 drives the energy storage compressor unit 2 to compress the heat pump circulating gas working medium at normal temperature and low pressure to a high-temperature high-pressure state; the temperature of the high-temperature high-pressure heat pump circulating gas working medium is reduced to normal temperature through the heat storage loop heat exchanger 7; meanwhile, gas in the indirect heat storage loop is driven by a high-temperature fan 8, is heated by a heat storage loop heat exchanger 7 and is cooled by a high-temperature heat storage unit 9, and meanwhile, high-temperature heat energy is stored in a heat storage medium of the high-temperature heat storage unit 9; the temperature of the heat pump circulating gas working medium at normal temperature and high pressure is reduced to be near the room temperature through the hot side of the first high-pressure heat exchanger 10; the heat pump circulating gas working medium with high room temperature and high pressure further passes through the energy storage expansion unit 3 to be expanded to low temperature and low pressure; the low-temperature low-pressure heat pump circulating gas working medium raises the temperature of the low-temperature low-pressure heat pump circulating gas working medium to normal temperature through the cold storage loop heat exchanger 4, meanwhile, gas in the indirect cold storage loop is driven by the low-temperature fan 6, is cooled through the cold storage loop heat exchanger 5 and then is heated through the low-temperature cold storage unit 5, and meanwhile, low-temperature cold energy is stored in a cold storage medium of the low-temperature cold storage unit 5; the temperature of the normal-temperature low-pressure heat pump circulating gas working medium is close to the room temperature after passing through the first low-pressure heat exchanger 15; the room-temperature low-pressure heat pump circulating gas working medium reenters the inlet of the heat pump energy storage compressor unit 2 to participate in heat pump circulation, and high-temperature heat energy and low-temperature cold energy are continuously stored in the heat storage medium of the high-temperature heat storage unit 9 and the cold storage medium of the low-temperature cold storage unit 5 in a reciprocating manner.
In the electricity utilization peak period, the low-temperature fan 6 in the indirect cold storage loop rotates reversely, gas in the indirect cold storage loop is driven by the low-temperature fan 6, low-temperature cold energy stored in a heat storage medium of the high-temperature heat storage unit 5 is absorbed by the high-temperature heat storage unit 5, and the gas is heated by the cold storage loop heat exchanger 4; the normal-temperature low-pressure circulating gas in the heat engine power generation loop passes through the cold storage loop heat exchanger 4, absorbs low-temperature cold energy, then is cooled to low temperature and low pressure, and passes through the energy release compressor unit 12 to compress the low-temperature low-pressure heat pump circulating gas working medium to a normal-temperature high-pressure state; the temperature of the gas working medium at normal temperature and high pressure is reduced to be near the room temperature through the hot side of the second high-pressure heat exchanger 16; meanwhile, the high-temperature fan 8 in the indirect heat storage loop rotates reversely, gas in the indirect heat storage loop is driven by the high-temperature fan 8, high-temperature heat energy stored in the heat storage medium of the high-temperature heat storage unit 9 is absorbed by the high-temperature heat storage unit 9, and the gas is cooled by the heat storage loop heat exchanger 7; the heat pump circulating gas passes through the heat storage loop heat exchanger 7 to raise the temperature of the gas working medium with room temperature and high pressure to high temperature; the high-temperature high-pressure heat pump circulating gas working medium further passes through the energy-releasing expansion unit 13 to reach normal temperature and low pressure; the temperature of the normal-temperature low-pressure heat pump circulating gas working medium is close to the room temperature after passing through the second low-pressure heat exchanger 16; and the room-temperature low-pressure gas working medium reenters the inlet of the cold storage loop heat exchanger 4 to participate in heat engine circulation. The energy release expansion unit 13 is in driving connection with the power generation unit 14, and the energy release compressor unit 12 is in driving connection with the energy release expansion unit 13. The circulation is repeated, and the stored high-temperature heat energy and the stored low-temperature cold energy are continuously converted into electric energy through the heat engine circulation to be output.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (1)
1. An energy storage system comprises an electric drive unit, an energy storage compressor unit, an energy storage expander unit, a cold storage loop heat exchanger, a low-temperature cold storage unit, a low-temperature fan, a heat storage loop heat exchanger, a high-temperature fan, a high-temperature heat storage unit, a first high-pressure heat exchanger, a second high-pressure heat exchanger, an energy release compressor unit, an energy release expander unit, a power generation unit, a first low-pressure heat exchanger, a second low-pressure heat exchanger and first to fourth three-way valves,
wherein the content of the first and second substances,
the electric drive unit is in driving connection with the energy storage compressor unit, the energy storage compressor unit is in transmission connection with the energy storage expansion unit, the energy release compressor unit is in transmission connection with the energy release expansion unit, and the energy release expansion unit is in driving connection with the power generation unit; the first to fourth three-way valves comprise three ports, namely a first port, a second port and a third port;
it is characterized in that the preparation method is characterized in that,
the system is arranged into a heat pump heating and refrigerating energy storage loop, a cold and heat energy heat engine power generation loop, an indirect heat storage loop and an indirect cold storage loop, wherein,
in the heat pump heating and refrigerating energy storage loop,
an exhaust port of the energy storage compressor unit is communicated with an air inlet of the energy storage expansion unit through a first connector and a second connector of the three-way valve I, a hot side of the heat storage loop heat exchanger, a first connector and a second connector of the three-way valve II and a hot side of the first high-pressure heat exchanger in sequence through pipelines,
an air outlet of the energy storage expansion unit is communicated with an air inlet of the energy storage compressor unit through a first connector and a second connector of the three-way valve III, a cold side of the cold storage loop heat exchanger, a first connector and a second connector of the three-way valve IV and a cold side of the first low-pressure heat exchanger in sequence through pipelines;
in the cold-heat energy heat engine power generation loop,
an air outlet of the energy release compressor unit is communicated with an air inlet of the energy release expansion unit through a hot side of the second high-pressure heat exchanger, a third connector and a first connector of the three-way valve II, a hot side of the heat storage loop heat exchanger, a second connector and a third connector of the three-way valve I in sequence through pipelines,
an air outlet of the energy release expansion unit is communicated with an air inlet of the energy release compressor unit through a cold side of the second low-pressure heat exchanger, a third connector and a first connector of a three-way valve IV, a cold side of a cold storage loop heat exchanger, a second connector and a third connector of a three-way valve III in sequence through pipelines;
in the indirect heat storage loop, a cold side of the heat storage loop heat exchanger, a high-temperature fan and a high-temperature heat storage unit are sequentially connected through pipelines to form a closed loop;
in the indirect cold storage loop, a hot side of the cold storage loop heat exchanger, the low-temperature fan and the low-temperature cold storage unit are sequentially connected through pipelines to form a closed loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922343211.6U CN211575590U (en) | 2019-12-24 | 2019-12-24 | Energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922343211.6U CN211575590U (en) | 2019-12-24 | 2019-12-24 | Energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211575590U true CN211575590U (en) | 2020-09-25 |
Family
ID=72548505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922343211.6U Active CN211575590U (en) | 2019-12-24 | 2019-12-24 | Energy storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211575590U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114382565A (en) * | 2022-01-24 | 2022-04-22 | 中国科学院工程热物理研究所 | Energy storage power generation system of combined cooling heating and power |
-
2019
- 2019-12-24 CN CN201922343211.6U patent/CN211575590U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114382565A (en) * | 2022-01-24 | 2022-04-22 | 中国科学院工程热物理研究所 | Energy storage power generation system of combined cooling heating and power |
| CN114382565B (en) * | 2022-01-24 | 2023-07-04 | 中国科学院工程热物理研究所 | Energy storage power generation system with combined cooling, heating and power |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110206599B (en) | Combined cooling, heating and power system | |
| CN109026241B (en) | Heat pump compressed air energy storage system | |
| CN110206598B (en) | Heat pump energy storage power generation system based on indirect cold storage and heat storage | |
| CN112524001B (en) | Heat pump electricity storage system based on transcritical Rankine cycle | |
| CN210370822U (en) | Heat pump energy storage power generation system based on array cold storage and heat storage | |
| CN110206600B (en) | Heat pump electricity storage system and method based on arrayed cold storage and heat storage | |
| CN104675680B (en) | A kind of compressed-air energy-storage system of supply of cooling, heating and electrical powers | |
| CN109441741B (en) | Peak-adjustable energy storage system based on supercritical carbon dioxide circulation and control method thereof | |
| CN108533476A (en) | A kind of heat pump supercritical air energy storage system | |
| CN113006889B (en) | Adiabatic near-isothermal compressed air energy storage system and operation method thereof | |
| CN111141056A (en) | Heat pump energy storage system based on indirect cold storage and heat storage | |
| CN103644081A (en) | Wind power generation, thermal power generation and compressed air energy storage integrated power generation system | |
| CN114198170B (en) | Carbon dioxide energy storage system based on double heat storage loops and working method thereof | |
| CN210441302U (en) | Combined cooling, heating and power system | |
| CN111351239B (en) | Solar heat storage and closed circulation coupling power generation system | |
| CN111022139A (en) | Coal-fired generating set coupling liquefied air energy storage power generation system | |
| CN210370818U (en) | Heat pump energy storage power generation system based on indirect cold storage and heat storage | |
| CN114033518B (en) | Comprehensive energy system based on carbon dioxide Carnot battery and operation method | |
| CN211575590U (en) | Energy storage system | |
| CN204858580U (en) | Electric energy energy memory | |
| CN203879675U (en) | Vapor-powered machine | |
| CN213841399U (en) | Heat pump electricity storage system | |
| CN114382560A (en) | Combined heat and power generation system with photovoltaic power generation and compressed air energy storage coupling | |
| CN210977618U (en) | Coal-fired generating set coupling liquefied air energy storage power generation system | |
| CN208456820U (en) | A kind of heat pump supercritical air energy storage system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |