CN114909704B - Energy storage system - Google Patents

Energy storage system Download PDF

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Publication number
CN114909704B
CN114909704B CN202210509170.7A CN202210509170A CN114909704B CN 114909704 B CN114909704 B CN 114909704B CN 202210509170 A CN202210509170 A CN 202210509170A CN 114909704 B CN114909704 B CN 114909704B
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China
Prior art keywords
energy storage
heat
heat exchange
storage device
absorption tower
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Active
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CN202210509170.7A
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Chinese (zh)
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CN114909704A (en
Inventor
段建国
许世民
王亚雄
苏庆宗
李健铭
靳玮
朱晨茜
熊鑫
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Inner Mongolia University of Science and Technology
BTE Tech Inc
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Inner Mongolia University of Science and Technology
BTE Tech Inc
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Priority to CN202210509170.7A priority Critical patent/CN114909704B/en
Publication of CN114909704A publication Critical patent/CN114909704A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D15/00—Other domestic- or space-heating systems
    • F24D15/02—Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/02—Central heating systems using heat accumulated in storage masses using heat pumps
    • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
    • F24D11/0221—Central heating systems using heat accumulated in storage masses using heat pumps water heating system combined with solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D15/00—Other domestic- or space-heating systems
    • F24D15/04—Other domestic- or space-heating systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a heat pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1042—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/30—Arrangements for concentrating solar-rays for solar heat collectors with lenses
    • F24S23/31—Arrangements for concentrating solar-rays for solar heat collectors with lenses having discontinuous faces, e.g. Fresnel lenses
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Photovoltaic Devices (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The embodiment of the disclosure discloses an energy storage system, which can acquire solar energy by utilizing a natural energy absorption tower; the geothermal energy can be obtained by the ground source heat pump unit, so that two natural energies can be obtained simultaneously, the applicability of the energy storage system is better, and the energy storage system can realize heat supply better. The control center is connected with the natural energy absorption tower, the ground source heat pump unit and the phase-change heat exchange energy storage device, so that the control center can monitor and change the states of the three at any time, and the natural energy absorption tower is connected with the phase-change heat exchange energy storage device through a bidirectional pipeline, so that energy absorbed by the natural energy absorption tower can be stored in the phase-change heat exchange energy storage device. Thus, the energy in the environment can be better utilized; further improving the applicability of the energy storage system.

Description

Energy storage system
Technical Field
The disclosed examples relate to the field of energy conversion technology, and in particular to energy storage systems.
Background
In recent years, with the development of science, geothermal pump technology has also been developed faster, that is, people have solved the problem that the indoor temperature is too low in a relatively cold region to a certain extent through the geothermal pump, so that the life of people is facilitated.
In recent years, as the energy structure of China is mainly fossil energy, governments are under way of a series of policies, and the renewable energy source is encouraged and supported to be utilized to solve the requirements of civil, commercial and industrial heating and air conditioning, and the resource-saving and environment-friendly society is built, so that the sustainable development capability is enhanced. In this context, the geothermal pump technology is only used to supply heat to a relatively cold area, and it is obvious that the current requirements cannot be satisfied.
Disclosure of Invention
This disclosure is provided in part to introduce concepts in a simplified form that are further described below in the detailed description. This disclosure is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
The embodiment of the disclosure provides an energy storage system, which can occupy a small area due to the utilization of various energy sources, so that the initial investment is low, and the application range is wider. Meanwhile, various energy sources are utilized, so that the stability of the energy storage system is better, and the energy consumed by the energy storage system can be quickly filled.
Embodiments of the present disclosure provide an energy storage system comprising: natural energy absorption tower, ground source heat pump set, phase change heat exchange energy storage device and control center; the natural energy absorption tower, the ground source heat pump unit and the phase change heat exchange energy storage device are all connected with the control center; the natural energy absorption tower and the ground source heat pump unit are both connected with the phase-change heat exchange energy storage device through a bidirectional pipeline; at least one electric control switch is arranged on each pipeline of the two-way pipeline; the control center is also connected with the electric control switch.
In some embodiments, the control center controls the opening and closing of each electronically controlled switch based on the temperature of the current external environment.
In some embodiments, a ground source heat pump unit includes: the device comprises a compressor, an evaporator, a condenser and a control cabinet; the compressor, the evaporator and the condenser are all connected with the control cabinet; the compressor and the condenser are connected with the evaporator; the natural energy absorption tower is connected with the evaporator through a first bidirectional pipeline; the phase-change heat exchange energy storage device is connected with the evaporator through a second bidirectional pipeline.
In some embodiments, the natural energy absorber includes: fresnel lens condenser, photovoltaic panel, nano fluid heat collection box and nano fluid; the Fresnel lens condenser comprises a rotary controller, wherein the rotary controller is used for changing the included angle between the Fresnel lens condenser and the horizontal plane according to the irradiation angle of sunlight; the Fresnel lens condenser, the photovoltaic panel and the nano-fluid heat collection box are stacked, and the photovoltaic panel is arranged between the Fresnel lens condenser and the nano-fluid heat collection box; nano liquid is stored in the nano fluid heat collection box; the nano fluid heat collection box is connected with the phase change heat exchange energy storage device.
In some embodiments, the natural energy absorbing tower further comprises: heat superconducting finned tubes and panels; the battery plate is attached below the Fresnel lens condensing lens plate; one end of the heat superconducting finned tube is connected with the back plate of the cell plate, and the other end of the heat superconducting finned tube is immersed in the nano fluid.
In some embodiments, the natural energy absorbing tower further includes an electric fan; the wind-conveying direction of the electric fan corresponds to the placement position of the heat superconducting finned tube.
In some embodiments, the phase change heat exchange energy storage device includes: at least one energy storage column, each energy storage column communicates each other.
In some embodiments, the energy storage column comprises a U-shaped heat exchange tube and a solid porous heat conduction material, wherein nano-fluid is stored in the U-shaped heat exchange tube, and the U-shaped heat exchange tube is embedded in the solid porous heat conduction material.
In some embodiments, the energy storage system described above includes: a multi-stage jet pump; the multi-stage jet pump is respectively connected with the natural energy absorption tower, the ground source heat pump unit and the phase change heat exchange energy storage device, and is used for conveying substances in the natural energy absorption tower to the ground source heat pump unit or conveying substances in the natural energy absorption tower to the phase change heat exchange energy storage device.
In some embodiments, the energy storage system described above includes: a heat detector and a display screen are provided,
the heat detector is connected with the phase-change heat-exchange energy storage device and is used for detecting the stored heat in the phase-change heat-exchange energy storage device; the heat detector is also connected with the display screen.
In some embodiments, a manufacturing center is coupled to the display screen and the heat detector; and the control center is also used for controlling the display screen to display prompt information when the value detected by the heat detector is lower than a preset threshold value.
The energy storage system provided by the embodiment of the disclosure can utilize the natural energy absorption tower to acquire solar energy; the geothermal energy can be obtained by the ground source heat pump unit, so that two natural energies can be obtained simultaneously, the applicability of the energy storage system is better, and the energy storage system can realize heat supply better. The control center is connected with the natural energy absorption tower, the ground source heat pump unit and the phase-change heat exchange energy storage device, so that the control center can monitor and change the states of the three at any time, and the natural energy absorption tower is connected with the phase-change heat exchange energy storage device through a bidirectional pipeline, so that energy absorbed by the natural energy absorption tower can be stored in the phase-change heat exchange energy storage device. Thus, the energy in the environment can be better utilized; further improving the applicability of the energy storage system.
It can be seen that the energy storage system of the present application has high applicability, so that the energy storage system can be applied to various severe environments. (e.g., heating pastures in a large grassland, heating small-scale concentrated habitats far from towns, etc.).
Drawings
The above and other features, advantages, and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. The same or similar reference numbers will be used throughout the drawings to refer to the same or like elements. It should be understood that the figures are schematic and that elements and components are not necessarily drawn to scale.
FIG. 1 is a connection schematic of one embodiment of an energy storage system according to the present disclosure;
FIG. 2 is a schematic diagram of the operating logic of one embodiment of an energy storage system according to the present disclosure;
FIG. 3 is a schematic diagram of the internal structure of a natural energy absorber of one embodiment of the energy storage system of the present disclosure;
FIGS. 4-6 are schematic views of natural energy absorber structures of yet another embodiment of an energy storage system of the present disclosure;
fig. 7 is a schematic structural view of one of the energy storage columns in a phase change heat exchange energy storage device of another embodiment of the energy storage system of the present disclosure.
Mark summary
An energy storage system; 110-a natural energy absorption tower; 120-ground source heat pump units; 121-a condenser; 122-an evaporator; 123-compressor; 124-a control cabinet; 130-a phase-change heat exchange energy storage device; 140-a control center; 150-159-electric control switch; 160-161-a circulation pump; 301-photovoltaic cell pieces; 302-Fresnel lens condenser; 303-carbon nanotube nanofluid; 401-nanofluid; 403-photovoltaic panel; 404-nanofluid collector box; 406-a direct current heating rod; 407-ultra-silent fan; 408-heat superconducting finned tubes; 409—heat superconducting finned tube slide rail; 410-nanofluid outlet; 420-nanofluid inlet; 601—a condensing end; 602-an evaporation end; 700-an energy storage column; 701-a solid porous thermally conductive material; 702-U-shaped heat exchange tubes; 703-nanofluid.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure have been shown in the accompanying drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustration purposes only and are not intended to limit the scope of the present disclosure.
It should be understood that the various steps recited in the method embodiments of the present disclosure may be performed in a different order and/or performed in parallel. Furthermore, method embodiments may include additional steps and/or omit performing the illustrated steps. The scope of the present disclosure is not limited in this respect.
The term "including" and variations thereof as used herein are intended to be open-ended, i.e., including, but not limited to. The term "based on" is based at least in part on. The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments. Related definitions of other terms will be given in the description below.
It should be noted that the terms "first," "second," and the like in this disclosure are merely used to distinguish between different devices, modules, or units and are not used to define an order or interdependence of functions performed by the devices, modules, or units.
It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those of ordinary skill in the art will appreciate that "one or more" is intended to be understood as "one or more" unless the context clearly indicates otherwise.
The names of messages or information interacted between the various devices in the embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of such messages or information.
Referring to FIG. 1, which illustrates an energy storage system according to the present disclosure, as shown in FIG. 1, the energy storage system 10 may include: natural energy absorption tower 110, ground source heat pump unit 120, phase change heat exchange energy storage device 130, control center 140; the natural energy absorption tower 110, the ground source heat pump unit 120 and the phase-change heat exchange energy storage device 130 can be connected with the control center 140; the natural energy absorption tower 110 and the ground source heat pump unit 120 can be connected with the phase-change heat exchange energy storage device 130 through two-way pipelines; an electric control switch is arranged on each pipeline of the two-way pipeline; the control center 140 may also be connected to an electronically controlled switch.
Here, the control center 140 may be used to control the on and off of each electronically controlled switch.
As an example, the energy storage system 10 may be applied to individual farms, pastures, independent houses, and the like. That is, the energy storage system 10 may be applied to an independent building that is located far from town and may be used to heat the building.
As an example, the energy storage system provided herein is particularly suitable for applications such as: the areas such as the northern greenhouse, the mining area, the pasture and the like in China are relatively independent, the heat supply and heating requirements are not particularly large, and the energy storage system provided by the application can be better suitable for the relatively independent areas and the scenes with small heat supply requirements.
Here, the natural energy absorption tower 110, the ground source heat pump unit 120, and the phase-change heat exchange energy storage device 130 may be connected to the control center 140, so that the control center 140 may monitor the states of the three at any time, and may coordinate the energy transfer between the three. For example, the natural energy absorber 110 may be controlled to better receive natural energy (solar energy); the energy remainder value stored by the phase-change heat exchange energy storage device 130 at present can be detected in real time; the ground source heat pump unit 120 can be controlled to operate at any time to supply heat to the building requiring heat supply, etc.
Here, the natural energy absorber 110 may be understood as a device for converting solar energy, wind energy, or the like into electric energy and/or thermal energy.
The phase change heat exchange energy storage device 130 may be understood herein as a device for absorbing geothermal energy and storing the thermal energy.
Here, the ground source heat pump unit 120 may be understood as a device for transferring the natural energy absorption tower 110 and the phase change heat exchange energy storage device 130 to a device requiring heating and may provide hot water.
As an example, the natural energy absorption tower 110 is connected with the phase-change heat exchange energy storage device 130 through a bidirectional pipeline, so that the redundant heat in the natural energy absorption tower 110 can be stored in the phase-change heat exchange energy storage device 130; and the ground source heat pump unit 120 is connected with the phase-change heat exchange energy storage device 130 through a bidirectional pipeline, so that heat energy stored in the phase-change heat exchange energy storage device 130 can be conveniently extracted.
Here, the bidirectional pipeline may be understood as an input pipeline and an output pipeline, and the bidirectional pipeline is used for connection, so that liquid (energy) interaction can be conveniently performed among the natural energy absorption tower 110, the ground source heat pump unit 120 and the phase change heat exchange energy storage device 130.
It can be seen that the energy storage system in the present application can utilize natural energy absorber towers to capture solar energy; the geothermal energy can be obtained by the ground source heat pump unit, so that two natural energies can be obtained simultaneously, the applicability of the energy storage system is better, and the energy storage system can realize heat supply better. The control center is connected with the natural energy absorption tower, the ground source heat pump unit and the phase-change heat exchange energy storage device, so that the control center can monitor and change the states of the three at any time, and the natural energy absorption tower is connected with the phase-change heat exchange energy storage device through a bidirectional pipeline, so that energy absorbed by the natural energy absorption tower can be stored in the phase-change heat exchange energy storage device. Thus, the energy in the environment can be better utilized; further improving the applicability of the energy storage system.
It can be seen that the energy storage system of the present application has high applicability, so that the energy storage system can be applied to various severe environments. (e.g., heating pastures in a large grassland, heating small-scale concentrated habitats far from towns, etc.).
As can be seen from the above analysis, the energy storage system not only uses a single heat source, but also uses multiple heat sources, so that the problem of energy imbalance caused by using a single heat source in the related art can be avoided. Meanwhile, due to the fact that multiple energy sources are utilized, the situations that an energy storage system is high in energy attenuation speed, cannot stably run and the like can be avoided. And because of utilizing various heat sources, the occupied area of the energy storage system can be reduced, and the technical problems that the initial investment is large and the traditional heat pump technology is difficult to use in reverse seasons are correspondingly solved.
That is, the application scenario of the energy storage system in the present application may be more extensive. For example, a heating scene in a cold region may be used.
In some embodiments, the control center may control the on and off of each electronically controlled switch based on the current ambient temperature.
As an example, when the external environment temperature reaches a certain temperature, it can be characterized that heat may not need to be supplied to the building equipment at the moment, the control center can turn off an electric control switch between the natural energy absorption tower and the ground source heat pump unit, and can turn on the electric control switch between the natural energy absorption tower and the phase-change heat exchange energy storage device; therefore, the energy received by the natural energy absorption tower can be well transferred to the phase-change heat exchange energy storage device for storage.
In some embodiments, the control center may also control the opening and closing of each electronically controlled switch based on the current season.
As an example, the control center can determine to turn on the electric control switch on the natural energy absorption tower and the ground source heat pump unit pipeline when detecting that the current season is in winter, so that heat supply can be realized. The control center can also detect that the current season is in summer; and determining to start an electric control switch on the natural energy absorption tower and the pipeline of the ground source heat pump unit, so that energy can be stored conveniently.
By setting the control center, the control center can automatically control the opening and closing of the electric control switch according to actual conditions, so that the natural energy absorption tower, the ground source heat pump unit and the phase-change heat exchange energy storage device in the energy storage system can automatically exchange energy, and the energy storage system is more intelligent.
In some embodiments, the ground source heat pump unit may include: the device comprises a compressor, an evaporator, a condenser and a control cabinet; wherein, the compressor, the evaporator and the condenser are all connected with the control cabinet; the compressor and the condenser are both connected with the evaporator; the natural energy absorption tower is connected with the evaporator through a first bidirectional pipeline; the phase-change heat exchange energy storage device is connected with the evaporator through a second bidirectional pipeline.
The compressor is understood here to be a screw compressor.
Here, the control cabinet coordinates the operation of the compressor, the evaporator and the condenser, so that the ground source heat pump unit can realize the functions of heating and refrigerating.
For ease of understanding, the ground source heat pump unit will be described in connection with the heating process. When entering a heating season: the medium in the phase-change heat-exchange energy storage device exchanges heat with the low-temperature refrigerant in the evaporator, so that energy in the phase-change heat-exchange energy storage device can be transferred to the refrigerant, and after the medium in the phase-change heat-exchange energy storage device exchanges heat, the energy of the phase-change heat-exchange energy storage device can be extracted for the next cycle; the refrigerant with energy is passed through the ground source heat pump unit, the temperature of the refrigerant is continuously increased, heat exchange is carried out between the refrigerant and a low-temperature medium at the user side in a condenser of the ground source heat pump unit, the low-temperature medium at the user side is heated, and the heated medium can be conveyed to a building to realize the functions of hot water or heating; the heat exchanged refrigerant proceeds to the next cycle.
And when the heating season is finished: the ground source heat pump unit can stop running. At the moment, heat exchange can be carried out between the medium in the user side and the medium in the phase-change heat exchange energy storage device, so that an air conditioning function is realized, and meanwhile, indoor surplus energy is stored in the underground phase-change heat exchange energy storage device.
In the prior art, energy balance may not be realized and the problem of energy attenuation of a heat source of a ground source system may not be effectively solved because the high-temperature time in summer in a cold region (northern region) is short, and the refrigeration air conditioner is usually purely dependent on building waste heat to supplement energy. When the environmental temperature is high, the energy storage system can store the energy in the environment in the ground source energy storage pile, and the energy consumed by the system in a heating season is supplemented. Thus, the energy balance of the whole energy storage system in the heat supply or refrigeration process can be realized.
In some embodiments, the first bidirectional conduit and the second bidirectional conduit may comprise a common portion of the conduit.
As an example, the first bidirectional conduit and the second bidirectional conduit may comprise a common portion conduit may be understood as: the first bidirectional pipeline and the second bidirectional pipeline share part of the pipeline, so that the pipeline can be saved, and the manufacturing cost can be reduced.
In some embodiments, the natural energy absorber is connected to the phase change heat exchange energy storage device through a third bi-directional conduit.
In some embodiments, the third bidirectional conduit may also share a portion of the conduit with either the first bidirectional conduit or the second bidirectional conduit.
In order to facilitate understanding, the system diagram of the capacity storage system provided in the present application may be illustrated with reference to fig. 2, and as can be seen from fig. 2, any two of the natural energy absorption tower 110, the ground source heat pump unit 120, and the phase-change heat exchange energy storage device 130 may be connected through a bidirectional pipeline, so that energy transmission and storage are more convenient. It can be seen that at least one electronically controlled switch (it should be noted that the images indicated by reference numerals 150-159 in fig. 2 are all understood to be electronically controlled) may also be provided on each conduit, thereby facilitating better control of the flow of energy. And the bidirectional pipeline between the phase-change heat-exchange energy storage device 130 and the natural energy absorption tower 110 may share part of pipeline with the bidirectional pipeline between the phase-change heat-exchange energy storage device 130 and the evaporator 122 (the dashed box may be understood as the ground source heat pump unit 120, the compressor 123, the condenser 121, the control cabinet 124); accordingly, the natural energy absorber 110 may share a portion of the first bi-directional pipe between the evaporator 122 and the second bi-directional pipe between the phase change heat storage device 130 and the evaporator 122. It can be seen that, in order to better realize the liquid circulation of the pipeline energy, a circulation pump 160 may be disposed on the pipeline between the phase-change heat-exchange energy-storage device pipeline 130 and the condenser 121, and a circulation pump 161 may also be disposed on the external pipeline of the condenser 121.
Further, referring to fig. 2, an operation logic diagram of the energy storage system provided in the present application is described, specifically, when heating is performed in winter, the electric control switches 158, 150, 151 and 152 are turned off, and 153 and 154 are turned on, so that the input and output pipelines of the phase-change heat exchange energy storage device 130 can be directly connected with the evaporator 122 of the ground source heat pump unit 120, at this time, the electric control switches 157 and 159 are turned on, and the circulation pump 160 and the circulation pump 161 are turned on, so that the heating function can be achieved;
after the heating season is finished, the external environment temperature gradually rises, at this time, the ground source heat pump unit 120 can be turned off, meanwhile, the electric control switches 153 and 154 are turned off, and the natural energy absorption tower 110 is turned on 151 and 152 to store solar energy and natural energy to the phase-change heat exchange energy storage device 130, so that the energy balance of the system is ensured, the energy attenuation of the system is avoided, and the running stability of the system is ensured.
When the user side needs to realize the air conditioning function in hot summer, the electric control switches 157, 159, 151 and 152 can be closed, the electric control switches 158 and 150 can be opened, the circulating pump 160 and the circulating pump 161 can be opened for circulating heat exchange, and the redundant heat of the user side is transported and stored to the underground energy storage pile, so that the air conditioning function is realized.
In some embodiments, the natural energy absorber may include: fresnel lens condenser, photovoltaic panel, nano fluid heat collection box and nano fluid; the Fresnel lens condenser comprises a rotary controller, wherein the rotary controller is used for changing the included angle between the Fresnel lens condenser and the horizontal plane according to the irradiation angle of sunlight; the Fresnel lens condenser, the photovoltaic panel and the nano-fluid heat collection box are stacked, and the photovoltaic panel is arranged between the Fresnel lens condenser and the nano-fluid heat collection box; nano liquid is stored in the nano fluid heat collection box; the nano fluid heat collection box is connected with the phase change heat exchange energy storage device.
By way of example, the Fresnel lens condenser lens can better realize the better effect of collecting sunlight, so that the natural energy absorption tower can absorb solar energy better.
As an example, the nanofluid in the nanofluid heat collection tank may interact with the phase change heat exchange energy storage device in a liquid manner, so that heat in the natural energy absorption tower may be transferred to the phase change heat exchange energy storage device for storage in a liquid manner. Therefore, heat exchange between the nano fluid heat collection box and the phase change heat exchange energy storage device is realized.
Specifically, after the heating season (in practical application, the heating season can be determined according to practical situations), the natural energy absorption tower begins to supplement and store energy to the phase-change heat exchange energy storage device as the ambient temperature gradually increases and when the ambient temperature is greater than a certain temperature (for example, 22 ℃). For example, the solar light may be directly irradiated to a fresnel lens condenser of the natural energy absorption tower, and then the solar light is converged into a strong radiation beam and focused on a photovoltaic panel, and the photovoltaic panel is irradiated by the strong radiation beam to perform photoelectric efficient conversion and output direct current.
For ease of understanding, reference may be made to fig. 3, where fig. 3 is a schematic view of a part of the natural energy absorber, and it can be seen from fig. 3 that reference numeral 301 may be understood as a photovoltaic cell, reference numeral 302 may be understood as a fresnel lens condenser, and reference numeral 303 may be understood as a carbon nanotube nano-fluid; as can be seen from fig. 3, the fresnel lens collector, the photovoltaic panel and the nanofluid collector box are stacked.
In some implementations, the nanofluid may be composited with 150 mesh Cu nanoparticles using graphene and may be combined with low boiling point (20-45 ℃) working fluids. It should be noted that the working medium in this low boiling point range, that is, how much boiling point is specifically used, may be set in combination with the actual situation.
As an example, nanofluids with low boiling point, large specific heat capacity and high heat transfer coefficient can be selected, so that phase change energy transmission can be realized more efficiently under the condition of higher ambient temperature; in other words, the nanofluid selected for use in the present application may enable high energy, efficient heat transfer.
As an example, the phase-change heat-exchange energy storage device can be filled with a porous composite phase-change material formed by compositing graphene and Cu nanofibers and taking aerogel as a framework. Of course, what type of alloy is specifically selected may be limited according to practical situations, and what type of alloy is specifically selected is not limited herein.
In some embodiments, the angle between the fresnel lens and the horizontal direction may be defined according to specific practical situations, for example, the solar rays may be perpendicularly directed to the fresnel lens, so that the solar energy resource with high quality may be more efficiently utilized.
In some embodiments, the heat superconducting finned tubes and panels; the panel can be attached under the Gao Xiaofei fresnel lens condensing lens; one end of the heat superconducting finned tube is connected with the backboard of the battery plate, and the other end of the heat superconducting finned tube can be immersed in the nano fluid.
As an example, the photovoltaic panel is irradiated by a strong radiation beam, performs photoelectric efficient conversion, outputs direct current, and can input the direct current to the panel for storage; meanwhile, the solar light beams are converged, so that the surface temperature of the battery plate can be increased sharply, the high-efficiency heat dissipation finned tube is attached to the back surface of the battery plate, the finned tube is immersed into the nanofluid, and the high temperature of the surface of the battery plate transfers heat to the nanofluid heat collector rapidly through the attached heat dissipation device, so that the temperature of the battery plate is kept in a normal range.
In some embodiments, the natural energy absorber may further comprise a super-silent fan; the wind transmission direction of the ultra-silent fan corresponds to the placement position of the heat superconducting finned tube.
As an example, when the natural energy absorber may further include a super-silent fan; when the wind transmission direction of the ultra-silent fan corresponds to the placement position of the heat superconducting finned tube, the natural energy absorption tower can better dissipate heat, and therefore the temperature of the natural energy absorption tower can be prevented from being too high.
The base liquid of the nanofluid can be R141b or acetone, so that the nanofluid medium has excellent stability and higher heat conductivity coefficient, and the heat conductivity coefficient of the nanofluid medium is 1.6-2.0 times that of a common fluid, and heat exchange can be performed quickly and efficiently. Meanwhile, the dew point temperature of the nano fluid is below 50 ℃ below zero, and the system does not need to be additionally provided with anti-freezing measures, so that the system is more convenient to install and maintain. Thereby further improving the stability of the energy storage system.
That is, the solar Fresnel lens condenser is adopted, so that light rays can be focused on the photovoltaic panel, and on one hand, the power generation efficiency of the photovoltaic panel in unit area can be remarkably improved. The back of the photovoltaic panel can be attached with the panel, the panel can be tightly connected with the heat superconducting material, the heat superconducting material can be connected with the nano-fluid heat collection box, the carbon nano-tube nano-fluid with high heat conductivity coefficient and stability is filled in the heat collection box, high-temperature energy collected on the photovoltaic panel can exchange heat with the carbon nano-fluid efficiently through the heat superconducting material on the back of the battery, the nano-fluid in the heat collection box can be heated continuously, the electric energy generated by the photovoltaic panel can also be used for synchronously heating the nano-fluid heat collection box through the direct-current electric heater, and then the temperature in the heater can be increased rapidly.
The bottom of the high-efficiency nano fluid heat collection box is connected with a heat superconducting finned tube which can be exposed to the external environment; the included angle between the heat superconducting fins and the horizontal plane is a predefined angle (for example, the included angle can be 30-45 degrees), the inner wall of the heat superconducting finned tube can be sintered with a nano structure layer, the heat transfer coefficient of the heat superconducting finned tube can be remarkably improved, when the medium in the heat superconducting finned tube is subjected to heat led in by the fins outside the tube wall, part of the medium is subjected to phase change and becomes gas, and moves upwards to the condensing end, the condensed heat is released, becomes liquid, and is heated, and the inner wall of the finned tube is continuously supplemented with the liquid under the action of the capillary force of the nano structure, so that the heat transfer capacity can be maintained at a higher level. In summer, because the ambient temperature is suddenly increased, external high-temperature air can be continuously conveyed through the thermal superconducting finned tube through the ultra-silent fan, heat in the air is extracted and conveyed to the carbon nano-fluid through the thermal superconducting tube, and the temperature of the nano-fluid is rapidly increased; and the shutter can be automatically controlled by the control center, and when the ambient temperature does not reach the opening condition, the shutter is in a normally closed state, so that the heat superconducting finned tube dust accumulation in the exposed environment is avoided, and the heat exchange effect is influenced. In this way, the energy storage system can be made more versatile.
For ease of understanding, the natural energy absorber will be described with reference to fig. 4-6, where fig. 4-6 can be understood as schematic structural diagrams of the natural energy absorber 110, and as can be seen from fig. 4, the photovoltaic panel 403, the nano fluid heat collecting tank 404, the nano fluid 401, the direct current heating rod 406, the super-silent fan 407, the heat superconducting finned tube 408, the heat superconducting finned tube sliding rail 409, and the like form a schematic structural diagram of the natural energy absorber, and reference numeral 410 in the drawing can represent a nano fluid outlet, and reference numeral 420 can represent a nano fluid inlet.
The effect and function of the heat superconducting finned tube 408 is further described in connection with fig. 5-6; when the ambient temperature is 10 ℃ higher than the temperature of the circulating pipeline, the electric louver is started, the ultra-silent fan 407 is started, when hot air in the environment passes through the hydrophobic heat superconducting finned tube 408, the medium in the heat superconducting finned tube 408 is heated to generate phase change and starts to move upwards, when the medium moves to the condensing end 601, the medium is condensed into liquid, heat is released, the liquid is transferred to the nano fluid 401 in the nano fluid heat collection box 404, the condensed liquid flows back to the evaporating end 602, and the heat continues to be heated to perform phase change evaporation, so that the medium is circularly reciprocated to perform heat exchange. The inner wall of the heat superconducting fin is of a nano structure, after the medium is heated to generate phase change, a cavity is generated on the phase change surface, and under the action of capillary force of the nano structure, the liquid medium is rapidly supplemented to the inner wall surface of the fin tube to conduct subsequent heat conduction. The heat transfer coefficient of the nano-structure finned tube is 2-3 times of that of a common fin Guan Chuan, so that heat transfer under the condition of small temperature difference can be efficiently realized; this further increases the applicability of the energy storage system, thereby allowing the energy storage system to be used in more scenarios. While reference numeral 501 in fig. 5 may be understood as a high-efficiency heat dissipating plate 501, heat dissipation of the photovoltaic panel 403 may be effectively achieved due to the attachment of the high-efficiency heat dissipating plate 501 to the photovoltaic panel 403.
In some embodiments, a phase change heat exchange energy storage device comprises: at least one energy storage column, each energy storage column communicates each other.
As an example, at least one energy storage column is arranged, and each energy storage column is relatively independent, so that the phase-change heat exchange energy storage device can be overhauled conveniently while the energy storage capacity of the phase-change heat exchange energy storage device is increased.
It should be noted that, the specific number of at least one energy storage column may be defined according to an actual application scenario, and the specific number of the indicated energy storage column is not limited herein, and only needs to be reasonably set according to an actual situation.
In some embodiments, the energy storage column may comprise a U-shaped heat exchange tube, a solid porous thermally conductive material.
The U-shaped heat exchange tube can store nano fluid therein, and the U-shaped heat exchange tube can be embedded in the solid porous heat conducting material.
By way of example, nanofluids may be understood as heat exchange media.
Here, the medium of the solid porous heat conductive material may be a high heat conductivity coefficient heat transfer medium, for example, a carbon nanotube-R141 b nanofluid.
That is, by changing the materials of the solid porous heat conducting material and the nano fluid, the phase change heat exchange energy storage device can store and release heat under the condition of smaller temperature difference, and can realize the seasonal super-large capacity energy storage. For example, when the phase-change heat exchange energy storage device is used for supplementing energy, the nanofluid has good heat conduction performance, so that heat can be rapidly emitted out and transferred to the ground for storage; when the nano fluid enters a heating season, the nano fluid can efficiently convey underground energy to the heat pump evaporator and can perform efficient conversion, so that the working performance of the heat pump and the stability of the whole energy storage system are greatly improved.
For ease of understanding, fig. 7 may be described in conjunction with fig. 7, where fig. 7 is a schematic structural diagram of one energy storage column 700 in the phase change heat exchange energy storage device 130, and as can be seen from fig. 7, the energy storage column 700 may include a U-shaped heat exchange tube 702, a solid porous heat conducting material 701, and a nanofluid 703; the energy storage column 700 can be placed into underground soil with a certain depth (for example, 100-150 m) from the earth surface, one end of the U-shaped heat exchange tube 702 is connected with an output pipeline, the other end is connected with an input pipeline, and the U-shaped heat exchange tube 702 is filled with carbon nano tube nano fluid 703. After the nanofluid in the pipeline absorbs the energy of the energy supplementing tower, the temperature rises and circulates to the underground energy storage column, and the overall heat transfer coefficient of the underground energy storage column system is obviously increased due to the fact that the carbon nano-tube nanofluid has a high heat conduction coefficient, heat exchange is more efficient, and efficient heat exchange under a small temperature difference can be achieved.
In some embodiments, an energy storage system may include: the heat detector is connected with the phase-change heat exchange energy storage device, and is also connected with the display screen.
Here, the heat detector may be used to detect stored heat within the phase change heat exchange energy storage device.
By way of example, the display screen may display the values detected by the heat detector, so that a user may conveniently learn about the current condition of the phase-change heat-exchange energy storage device, so that the user may determine whether other heating measures are needed, and thus the practicability of the energy storage system may be further improved.
In some embodiments, the control center may also be connected to a display screen and a heat detector; the control center is also used for controlling the display screen to display prompt information when the value detected by the heat detector is lower than the preset threshold value
By way of example, such a design may allow a user to better understand the energy storage of the energy storage system.
In some embodiments, the energy storage system may further comprise: a multi-stage jet pump; the multi-stage jet pump can be respectively connected with the natural energy absorption tower, the ground source heat pump unit and the phase change heat exchange energy storage device, and is used for conveying substances in the natural energy absorption tower to the ground source heat pump unit or conveying substances in the natural energy absorption tower to the phase change heat exchange energy storage device.
The multistage jet pump can be used for conveying the hot nano fluid vapor-liquid mixture in the natural energy absorption tower to a heat pump evaporator of a ground source heat pump unit for heat exchange, or conveying the hot nano fluid vapor-liquid mixture in the natural energy absorption tower to an underground energy storage column of the phase change heat exchange energy storage device for heat exchange.
As an example, the delivery of the hot nanofluid vapor-liquid mixture using a multi-stage jet pump may improve the efficiency of the hot nanofluid vapor-liquid mixture delivery.
In summary, the energy storage system provided by the present application has at least the following advantages:
as a plurality of energy sources are utilized, the energy storage system can occupy a small area, so that the initial investment is low, and the application range is wider. Meanwhile, various energy sources are utilized, so that the stability of the energy storage system is better, and the energy consumed by the energy storage system can be quickly filled.
And because of the control center, the energy transfer and inspection are more convenient, and the energy storage system is more intelligent.
The natural energy absorption tower includes: the Fresnel lens condensing lens has strong condensing capability, so that energy sources can be better utilized.
It should be noted that the computer readable medium of the present disclosure may be a computer readable signal medium or a computer readable storage medium or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this disclosure, a computer-readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In the present disclosure, however, the computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, with the computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, fiber optic cables, RF (radio frequency), and the like, or any suitable combination of the foregoing.
In some implementations, the clients, servers may communicate using any currently known or future developed network protocol, such as HTTP (HyperText Transfer Protocol ), and may be interconnected with any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include a local area network ("LAN"), a wide area network ("WAN"), the internet (e.g., the internet), and peer-to-peer networks (e.g., ad hoc peer-to-peer networks), as well as any currently known or future developed networks.
The computer readable medium may be contained in the electronic device; or may exist alone without being incorporated into the electronic device.
The computer readable medium carries one or more programs which, when executed by the electronic device, cause the electronic device to: in response to detecting an inspection instruction for an electrical characteristic of the sample, applying an amplitude modulated alternating voltage to the probe, wherein the amplitude modulated alternating voltage comprises a modulated signal, a carrier signal, and the electrical characteristic comprises at least any one of: carrier concentration, conductivity, and dielectric constant; the electrical characteristics of the sample are determined based on the amplitude and phase of the probe at a predetermined frequency of the modulated signal.
Computer program code for carrying out operations of the present disclosure may be written in one or more programming languages, including, but not limited to, an object oriented programming language such as Java, smalltalk, C ++ and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units involved in the embodiments of the present disclosure may be implemented by means of software, or may be implemented by means of hardware.
The functions described above herein may be performed, at least in part, by one or more hardware logic components. For example, without limitation, exemplary types of hardware logic components that may be used include: a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), an Application Specific Standard Product (ASSP), a system on a chip (SOC), a Complex Programmable Logic Device (CPLD), and the like.
In the context of this disclosure, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The foregoing description is only of the preferred embodiments of the present disclosure and description of the principles of the technology being employed. It will be appreciated by persons skilled in the art that the scope of the disclosure referred to in this disclosure is not limited to the specific combinations of features described above, but also covers other embodiments which may be formed by any combination of features described above or equivalents thereof without departing from the spirit of the disclosure. Such as those described above, are mutually substituted with the technical features having similar functions disclosed in the present disclosure (but not limited thereto).
Moreover, although operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are example forms of implementing the claims.

Claims (7)

1. An energy storage system, comprising:
natural energy absorption tower, ground source heat pump set, phase change heat exchange energy storage device and control center;
the natural energy absorption tower, the ground source heat pump unit and the phase change heat exchange energy storage device are all connected with the control center;
the natural energy absorption tower and the ground source heat pump unit are both connected with the phase-change heat exchange energy storage device through a bidirectional pipeline;
at least one electric control switch is arranged on each pipeline of the two-way pipeline;
the control center is also connected with the electric control switch;
wherein, the natural energy absorption tower includes: fresnel lens condenser, photovoltaic panel, nano fluid heat collection box and nano fluid;
the Fresnel lens condenser comprises a rotary controller, wherein the rotary controller is used for changing the included angle between the Fresnel lens condenser and the horizontal plane according to the irradiation angle of sunlight;
The Fresnel lens collecting lens, the photovoltaic panel and the nano-fluid heat collection box are stacked, and the photovoltaic panel is arranged between the Fresnel lens collecting lens and the nano-fluid heat collection box;
nano liquid is stored in the nano fluid heat collection box;
the nano fluid heat collection box is connected with the phase change heat exchange energy storage device;
wherein, the natural energy absorption tower further includes:
heat superconducting finned tubes and panels;
one end of the heat superconducting finned tube is connected with the battery plate, and the other end of the heat superconducting finned tube is immersed into the nano fluid;
wherein the base fluid of the nanofluid comprises R141b or acetone;
the bottom of the nano fluid heat collection box is connected with a heat superconducting finned tube, and the heat superconducting finned tube is partially exposed to the external environment; the inner wall of the heat superconducting finned tube is sintered with a nano-structure layer;
wherein, the natural energy absorption tower also comprises an ultra-silent fan;
the wind conveying direction of the ultra-silent fan corresponds to the placement position of the heat superconducting finned tube;
the natural energy absorption tower comprises a shell, wherein the ultra-silent fan and the heat superconducting finned tube are arranged in the shell, and an electric shutter is arranged on the shell and corresponds to the ultra-silent fan;
The ultra-silent fan is used for conveying external high-temperature air through the thermal superconducting finned tube so that heat in the air is conveyed to the nano fluid through the thermal superconducting tube, and the temperature of the nano fluid is increased;
the control center is used for controlling the shutter, and when the ambient temperature does not reach the opening condition, the shutter is in a normally closed state.
2. The energy storage system of claim 1, wherein the energy storage system comprises a plurality of energy storage devices,
the control center controls the opening and closing of each electric control switch based on the temperature of the current external environment.
3. The energy storage system of claim 1, wherein the ground source heat pump unit comprises: the device comprises a compressor, an evaporator, a condenser and a control cabinet;
the compressor, the evaporator and the condenser are all connected with the control cabinet; the compressor and the condenser are both connected with the evaporator;
the natural energy absorption tower is connected with the evaporator through a first bidirectional pipeline;
the phase-change heat exchange energy storage device is connected with the evaporator through a second bidirectional pipeline.
4. The energy storage system of claim 1, wherein the phase change heat exchange energy storage device comprises: at least one energy storage column, each energy storage column is communicated with each other;
The energy storage column comprises a U-shaped heat exchange tube and a solid porous heat conduction material, wherein nano fluid is stored in the U-shaped heat exchange tube, and the U-shaped heat exchange tube is embedded in the solid porous heat conduction material.
5. The energy storage system of claim 1, wherein the energy storage system comprises: a multi-stage jet pump;
the multi-stage jet pump is respectively connected with the natural energy absorption tower, the ground source heat pump unit and the phase change heat exchange energy storage device, and is used for conveying substances in the natural energy absorption tower to the ground source heat pump unit or conveying substances in the natural energy absorption tower to the phase change heat exchange energy storage device.
6. The energy storage system of claim 1, wherein the energy storage system comprises: a heat detector and a display screen are provided,
the heat detector is connected with the phase-change heat exchange energy storage device and is used for detecting stored heat in the phase-change heat exchange energy storage device;
the heat detector is also connected with the display screen.
7. The energy storage system of claim 6, wherein a control center is connected to the display screen and the heat detector;
And the control center is also used for controlling the display screen to display prompt information when the value detected by the heat detector is lower than a preset threshold value.
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