Isothermal air compression energy storage device and method based on high-voltage electrostatic field enhanced flash spray space heat dissipation

Abstract

The invention relates to an isothermal air compression energy storage device based on high-voltage electrostatic field enhanced flash spray space heat dissipation, which comprises an air compression energy storage system, a low-temperature medium storage tank, a compressed air energy release system, a high-temperature medium storage tank, an air storage tank, a heat exchanger, a nanofluid pipeline and a control system, cooling liquid released by the low-temperature medium storage tank circulates in the device to achieve isothermal air compression energy storage. The invention further relates to a method of the isothermal air compression energy storage device based on high-voltage electrostatic field enhanced flash spray space heat dissipation. Isothermal air compression energy storage is achieved through cooling liquid flash spray cooling and circulation in the device. By means of the isothermal air compression energy storage device and method based on high-voltage electrostatic field enhanced flash evaporation spraying space heat dissipation, air isothermal compression energy storage can be accurately achieved, and the problems that in air isothermal compression energy storage, cooling liquid is difficult to recycle, and liquid drop breaking energy consumption is high are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air compression energy storage, and in particular to an isothermal air compression energy storage device and method based on high-voltage electrostatic field-enhanced flash evaporation spray spatial heat dissipation. Background Art

[0002] In recent years, the power system with new energy as the main body has developed rapidly. The low-carbon transformation of the energy industry has become the key to achieving the "dual carbon" goal. However, due to the intermittent and uncertain characteristics of new energy, its large-scale grid connection may bring about problems such as unstable grid operation. Combining electric energy with energy storage systems can optimize electric energy distribution, reduce energy waste, and improve the stability of the power system. At present, there are many types of energy storage technologies. Considering the output power, efficiency, life, operating cost, storage cycle and other aspects of the energy storage system, compressed air energy storage is one of the energy storage technologies suitable for large-scale system operation. It can be used in power system frequency regulation, peak regulation, energy management, standby and other fields. According to the heat management method of air during the compression process, compressed air energy storage can be divided into non-adiabatic compressed air energy storage, adiabatic compressed air energy storage and isothermal compressed air energy storage. Among them, the isothermal compressed air energy storage route has low operating parameters and high theoretical efficiency, and can abandon heat storage and cold storage. Heat storage / cold storage has problems such as expensive phase change materials, difficult storage of heat storage media and high heat transfer resistance.

[0003] In the existing technology, conventional water mist spraying can effectively reduce the temperature rise of compressed air, but the isothermal air compression energy storage method using this technology still cannot precisely control the temperature stability and is difficult to maintain a high energy storage efficiency. In addition, due to the influence of environmental water vapor, the thermodynamic properties of air change, which will affect the air compression energy storage efficiency. Using flash spray cooling can more precisely control the temperature stability and reduce the impact on the thermodynamic properties of the ambient gas, but this technology also has the problem of difficulty in cooling liquid recovery and high energy consumption of droplet breakage.

[0004] Therefore, the prior art has defects and needs to be improved and developed. Summary of the invention

[0005] The embodiment of the present invention provides an isothermal air compression energy storage device and method based on high-voltage electrostatic field enhanced flash spray space heat dissipation, which is used to solve the problem in the prior art that conventional water mist spraying means can effectively reduce the temperature rise of compressed air, but the isothermal air compression energy storage method using this technology still cannot finely control the temperature stability and is difficult to maintain a high energy storage efficiency. In addition, due to the influence of environmental water vapor, the thermodynamic properties of air change, which will affect the air compression energy storage efficiency. Using flash spray cooling can more finely control the temperature stability and reduce the impact on the thermodynamic properties of the ambient gas, but this technology also has the problem of difficulty in cooling liquid recovery and high energy consumption of droplet breakage.

[0006] In a first aspect of an embodiment of the present invention, there is provided an isothermal air compression energy storage device based on high-voltage electrostatic field-enhanced flash spray space heat dissipation, comprising an air compression energy storage system, a low-temperature medium storage tank, a compressed air energy release system, a high-temperature medium storage tank, an air storage tank, a heat exchanger, a nanofluid pipeline and a control system, wherein the air compression energy storage system comprises an electric motor, an air isothermal compression chamber and a first pipeline, wherein the electric motor is connected to the air isothermal compression chamber, and when the electric motor is started, the electric motor is used to open the air inlet of the air isothermal compression chamber and inhale dry air; a cicada-wing-shaped high heat flux density bionic microchannel is arranged on the inner circumference of the air isothermal compression chamber, and the air isothermal compression chamber is provided with a plurality of air channels, wherein ... The compression chamber is connected to the air storage tank through the first pipeline, and is located between the air isothermal compression chamber and the air storage tank and is arranged on the first pipeline and is connected in sequence with a first gas-liquid separator and a dryer; a first three-way valve is connected to the liquid outlet pipe of the low-temperature medium storage tank, one liquid outlet of the first three-way valve is connected to a second pipeline, and one end of the second pipeline not connected to the first three-way valve is connected to the air isothermal compression chamber, and the other liquid outlet of the first three-way valve is connected to a third pipeline, and one end of the third pipeline not connected to the first three-way valve is connected to the liquid inlet of the cicada-wing type high heat flux density bionic microchannel; a liquid outlet between the first three-way valve and the air isothermal compression chamber is connected to the first three-way valve, and the liquid outlet of the first three-way valve is connected to the third pipeline, and the one end of the third pipeline not connected to the first three-way valve is connected to the liquid inlet of the cicada-wing type high heat flux density bionic microchannel is connected to the first three-way valve. The first ultra-micro solenoid valve, the first charged spray chamber and the refrigeration nozzle are connected in sequence between the chambers and arranged on the second pipeline, and the refrigeration nozzle is fixed on the air isothermal compression chamber; the compressed air energy release system includes an isothermal expander, a generator and a fourth pipeline, the generator is connected to the isothermal expander, and when the isothermal expander is started, the isothermal expander is used to drive the air to drive the generator to operate; the isothermal expander is connected to the air storage tank through the fourth pipeline; the isothermal expander is connected to the heat exchanger through the fifth pipeline, and the fifth pipeline is also connected to the second gas-liquid separator, the outlet pipe of the second gas-liquid separator is connected to the outside, when the second gas When the liquid separator is started, the fifth pipeline is used to discharge the liquid in the second gas-liquid separator; the liquid outlet pipe of the high-temperature medium storage tank is connected to a second three-way valve, one liquid outlet of the second three-way valve is connected to a sixth pipeline, one end of the sixth pipeline not connected to the second three-way valve is connected to the isothermal expander, and the other liquid outlet of the second three-way valve is connected to a seventh pipeline, one end of the seventh pipeline not connected to the second three-way valve is connected to the heat exchanger; a second ultra-micro solenoid valve, a second charged spray chamber and a heating nozzle are sequentially connected and arranged on the sixth pipeline between the second three-way valve and the isothermal expander, and the heating nozzle is fixed on the isothermal expander;An eighth pipeline is connected between one end of the nanofluid pipeline and the cicada-wing high heat flux density bionic microchannel, a ninth pipeline is connected between the first gas-liquid separator and the eighth pipeline, and the ninth pipeline is used to discharge the liquid in the first gas-liquid separator when the first gas-liquid separator is started; a tenth pipeline is connected between the other end of the nanofluid pipeline and the heat exchanger, a third three-way valve is connected to the liquid outlet of the heat exchanger, an eleventh pipeline is connected to one liquid outlet of the third three-way valve, an end of the eleventh pipeline not connected to the third three-way valve is connected to the low-temperature medium storage tank, and another liquid outlet of the third three-way valve is connected to a twelfth pipeline, an end of the twelfth pipeline not connected to the third three-way valve is connected to the liquid outlet pipe of the low-temperature medium storage tank; a solar panel is arranged around the nanofluid pipeline, and a circulating pump is arranged in the nanofluid pipeline. When the circulating pump is started, the circulating pump Used to drive the liquid in the nanofluid pipeline to circulate; the control system includes a main controller, a high-voltage electrostatic generator and a nanofluid pipeline controller, the main controller is electrically connected to the solar panel, and when the main controller is started, the main controller is used to control the start and stop of the high-voltage electrostatic generator and the nanofluid pipeline controller; the main controller is electrically connected in parallel to the high-voltage electrostatic generator and the nanofluid pipeline controller, the high-voltage electrostatic generator includes a first circuit and a second circuit in parallel, the first circuit is connected in parallel to the first ultra-micro solenoid valve, the needle electrode in the first charged spray chamber and the first temperature probe, the first temperature probe is located in the air isothermal compression chamber, the second circuit is connected in parallel to the second ultra-micro solenoid valve, the needle electrode in the second charged spray chamber and the second temperature probe, the second temperature probe is located in the isothermal expander; the nanofluid pipeline controller is electrically connected to the circulation pump. ;

[0007] Furthermore, a piston is provided in the air isothermal compression chamber, and when the motor is started, the piston is used to compress the dry air in the air isothermal compression chamber; the surface of the piston close to the dry air is covered with a first conductor, and the first conductor is grounded; the air isothermal compression chamber is provided with a second conductor at the outlet connected to the first pipe, and the second conductor is used to form an electric field with the first conductor.

[0008] Furthermore, the liquid in the nanofluid pipeline is mixed with Ag@SiO2 core-shell.

[0009] Furthermore, mesh electrodes are provided on the outer surfaces of the first gas-liquid separator and the second gas-liquid separator.

[0010] Furthermore, the gas-liquid separation flow channels in the first gas-liquid separator and the second gas-liquid separator are spirally shaped and arranged on the inner surface.

[0011] Furthermore, the first ultra-micro solenoid valve and the second ultra-micro solenoid valve have the same structure and a working pulse width of not less than 5 ms.

[0012] Furthermore, a zeolite molecular sieve is arranged inside the air storage tank, and the zeolite molecular sieve is used to improve the gas capture capacity of the zeolite molecular sieve after ultrasonic aging and adding seed induction.

[0013] Furthermore, a honeycomb flow channel is arranged at the air inlet of the air isothermal compression chamber, and when dry air is inhaled, the honeycomb flow channel is used to reduce air humidity and improve temperature control effect.

[0014] In a second aspect of the embodiment of the present invention, there is provided a method for an isothermal air compression energy storage device based on high-voltage electrostatic field-enhanced flash spray space heat dissipation, comprising:

[0015] Step 1: Turn on the motor to draw dry air into the air isothermal compression chamber;

[0016] Step 2: The coolant in the low-temperature medium storage tank is respectively transported to the cicada-wing type high heat flux density bionic microchannel and the first ultra-micro solenoid valve through the first three-way valve; the first ultra-micro solenoid valve is adjusted to control the coolant flow rate, and the coolant is transported to the first charged spray chamber; the main controller controls the high-voltage electrostatic generator to start the needle-shaped electrode in the first charged spray chamber and generate corona, promote the coolant droplet to break and charge, and adjust the coolant droplet size;

[0017] Step 3: Start the piston to compress the air, and the first temperature probe detects the temperature of the compressed air. When the temperature reaches the required temperature, the main controller controls the first ultra-micro solenoid valve to adjust the opening, so that the coolant droplets are transported from the first charged spray chamber to the refrigeration nozzle for flash evaporation and spraying. At this time, the gas and liquid in the air isothermal compression chamber quickly exchange heat, and the first conductor and the second conductor form an electric field to strengthen the gas-liquid heat and mass exchange, while promoting the migration and deposition of droplets for subsequent extraction; at the same time, the coolant in the cicada-wing-shaped high heat flux density bionic microchannel keeps flowing, maintains the temperature in the air isothermal compression chamber stable, and cooperates with the flash spray sprayed by the refrigeration nozzle to realize air isothermal compression energy storage;

[0018] Step 4: Open the air outlet of the air isothermal compression chamber to discharge the air, and the air carries the trace coolant droplets released during the compression process into the first gas-liquid separator with a mesh electrode and the mesh electrode has been activated. Under the action of electric field coupling, the trace coolant droplets in the air are quickly captured to achieve gas-liquid separation; the coolant separated from the first gas-liquid separator enters the ninth pipeline and meets the eighth pipeline connected to the cicada wing-shaped high heat flux density bionic microchannel, and the mixed coolant enters the nanofluid pipeline through the eighth pipeline; the high-pressure air separated from the first gas-liquid separator is dried by the dryer and then enters the air storage tank to complete the high-pressure air storage;

[0019] Step 5: Continuously start the solar panel, the circulation pump and the heat exchanger, the coolant liquid entering the nanofluid pipeline cooperates with the nanoparticles in the nanofluid pipeline to pass through the solar panel, the coolant absorbs heat, the temperature rises, and part of the high-temperature coolant flows out when passing through the tenth pipeline; the remaining coolant circulates in the nanofluid pipeline under the drive of the circulation pump; the outflowing high-temperature coolant increases the temperature through the heat exchanger, flows through the sixth pipeline through the second three-way valve, enters the second ultra-micro solenoid valve, and then enters the second charged spray chamber; the coolant droplets pass through the corona from the second charged spray chamber to the heating nozzle, at this time, the high-pressure air stored in the air storage tank enters the isothermal expander through the fourth pipeline, and is flash-sprayed by the heating nozzle to release latent heat of the droplets. The isothermal expander and the air isothermal compression chamber have the same electric field structure to enhance gas-liquid heat exchange and quickly collect droplets;

[0020] Step six: the isothermal expander drives the isothermal air to drive the generator to run; the gas that has completed the work is discharged from the fifth pipeline, and the carried droplets pass through the second gas-liquid separator. The gas passing through the second gas-liquid separator is discharged to the outside through the gas outlet of the second gas-liquid separator, and the coolant enters the heat exchanger through the fifth pipeline. The coolant in the heat exchanger passes through the third three-way valve connected to the liquid outlet of the heat exchanger. The third three-way valve is used to make the coolant flow through the eleventh pipeline and introduced into the low-temperature medium storage tank for storage, or introduced into the twelfth pipeline to participate in the next air isothermal compression process.

[0021] Furthermore, the temperature in the air isothermal compression chamber is maintained to be stable within a range of 99% to 101% of the required temperature.

[0022] Beneficial effects:

[0023] It can be seen from the above technical solutions that the present invention provides an isothermal air compression energy storage device and method based on high-voltage electrostatic field-enhanced flash spray space heat dissipation:

[0024] 1. Ultra-micro solenoid valves are used to precisely control the coolant flow parameters, and high-voltage electrostatic generators are used to achieve fine droplet breakup and charging, which further increases the gas-liquid contact area during air compression and expansion, and improves the heat exchange efficiency during air energy storage.

[0025] 2. Conductors are arranged in the air isothermal compression chamber, the piston of the isothermal expander, and the outlet of the working fluid. The spatial electric field generated during the working process can enhance the heat and mass exchange between the droplets and the surrounding gas. The amount of refrigerant used is greatly reduced, and the cooling and heating efficiency is improved; at the same time, the refrigerant can be deposited in a targeted manner, which is convenient for the recovery of the coolant and prevents the volatilization of the liquid from affecting the thermophysical properties of the air.

[0026] 3. Combining the principles of bionics, a special cicada-wing-shaped high heat flux density bionic microchannel is arranged for the air isothermal compression chamber. This channel maximizes the cooling capacity of the coolant and further recovers the excess low-quality heat energy, ensuring the thermal uniformity of the air compression process and avoiding the influence of the external ambient temperature on the compression conditions.

[0027] 4. Taking full advantage of the charge performance of the droplets, the mesh electrodes of the gas-liquid separation device are arranged at the outermost periphery, and the gas-liquid separation channel is in a spiral shape. When the coolant droplets enter the gas-liquid separation device along with the air, the gas-liquid can be efficiently separated under the combined action of the electric field traction generated by the outer mesh electrodes and the centrifugal force of the rotation process.

[0028] 5. Using solar photovoltaic panels as the energy source of the system, nanofluid pipes are designed around the photovoltaic panels to make full use of solar energy of different wavelengths. The cooling liquid after cooling is mixed with nanoparticles to maintain the constant temperature of the solar panel while absorbing energy of a specific wavelength, thereby improving the photoelectric conversion efficiency of the system. The high-temperature refrigeration liquid is used in the isothermal expansion process of air to achieve efficient utilization of multi-quality energy and facilitate the stable operation of the energy storage device.

[0029] It should be appreciated that all combinations of the foregoing concepts, as well as additional concepts described in greater detail below, may be considered to be part of the inventive subject matter of the present disclosure, provided such concepts are not mutually inconsistent.

[0030] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned from the practice of the specific embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are not drawn to scale according to actual reference objects. In the accompanying drawings, each identical or nearly identical component shown in various figures may be represented by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the present invention will be described by way of example and with reference to the accompanying drawings, in which:

[0032] Figure 1 It is a structural schematic diagram of an isothermal air compression energy storage device based on high-voltage electrostatic field enhanced flash spray spatial heat dissipation in an embodiment of the present application.

[0033] Figure 2 It is a structural schematic diagram of an air isothermal compression chamber of an isothermal air compression energy storage device and method based on high-voltage electrostatic field enhanced flash spray space heat dissipation in an embodiment of the present application.

[0034] Description of Figure Numbers:

[0035] Motor 1; air isothermal compression chamber 2; first pipeline 3; cicada wing high heat flux density bionic microchannel 4; air storage tank 5; first gas-liquid separator 6; dryer 7; low-temperature medium storage tank 8; first three-way valve 9; second pipeline 10; third pipeline 11; first ultra-micro solenoid valve 12; first charged spray chamber 13; refrigeration nozzle 14; isothermal expander 15; generator 16; fourth pipeline 17; fifth pipeline 18; heat exchanger 19; second gas-liquid separator 20; high-temperature medium storage tank 21; second three-way valve 22; The sixth pipeline 23; the seventh pipeline 24; the second ultra-micro solenoid valve 25; the second charged spray chamber 26; the heating nozzle 27; the nanofluid pipeline 28; the eighth pipeline 29; the ninth pipeline 30; the tenth pipeline 31; the third three-way valve 32; the eleventh pipeline 33; the twelfth pipeline 34; the solar panel 35; the circulation pump 36; the main controller 37; the high-voltage electrostatic generator 38; the nanofluid pipeline controller 39; the piston 40; the first conductor 41; the second conductor 42; the mesh electrode 43; the zeolite molecular sieve 44; the honeycomb flow channel 45. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the common meaning understood by people with general skills in the field to which the present invention belongs.

[0037] The words "first", "second" and similar terms used in the patent specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, unless the context clearly indicates otherwise, the singular form "a" or "an" shall not be construed as "a" or "an";

[0038] The words “a”, “an”, “the” and the like do not denote a limitation of quantity, but rather denote the presence of at least one.

[0039] The words "include" or "comprises" and the like mean that the elements or objects appearing before "includes" or "comprises" include the features, wholes, steps, operations, elements and / or components listed after "includes" or "comprises", and do not exclude the existence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] In the prior art, conventional water mist spraying can effectively reduce the temperature rise of compressed air, but the isothermal air compression energy storage method using this technology still cannot precisely control the temperature stability and is difficult to maintain a high energy storage efficiency. In addition, due to the influence of environmental water vapor, the thermodynamic properties of air change, which will affect the air compression energy storage efficiency. Flash spray cooling can more precisely control the temperature stability and reduce the impact on the thermodynamic properties of the ambient gas, but this technology also has the problems of difficulty in cooling liquid recovery and high energy consumption of droplet breakage.

[0041] In view of this, the first aspect of the embodiment of the present invention provides an isothermal air compression energy storage device based on high-voltage electrostatic field enhanced flash spray space heat dissipation, referring to Figure 1-2 , including an air compression energy storage system, a low-temperature medium storage tank 8, a compressed air energy release system, a high-temperature medium storage tank 21, an air storage tank 5, a heat exchanger 19, a nanofluid pipeline 28 and a control system.

[0042] The air compression energy storage system includes an electric motor 1, an air isothermal compression chamber 2 and a first pipeline 3. The electric motor 1 is connected to the air isothermal compression chamber 2. When the electric motor 1 is started, the electric motor 1 is used to open the air inlet of the air isothermal compression chamber 2 and inhale dry air. A cicada-wing-shaped high heat flux density bionic microchannel 4 is arranged on the inner circumferential surface of the air isothermal compression chamber 2. The air isothermal compression chamber 2 is connected to the air storage tank 5 through the first pipeline 3. A first gas-liquid separator 6 and a dryer 7 are located between the air isothermal compression chamber 2 and the air storage tank 5 and are arranged on the first pipeline 3 and are connected in sequence.

[0043] Among them, the motor 1 is a device that can convert low-quality electrical energy into mechanical energy, thereby driving the piston 40 in the air isothermal compression chamber 2 to operate. Any device that can achieve this process can be used in the present invention. The first gas-liquid separator 6 and the second gas-liquid separator 20 can use existing product devices, and the mesh electrode 43 is arranged at the outermost periphery. When the coolant droplets enter the gas-liquid separation device with the air, the electric field traction force generated by the outer mesh electrode 43 and the centrifugal force of the rotation process can achieve efficient gas-liquid separation. The air inlet pressure of the air isothermal compression chamber 2 can be given as 0.5MPa. The cicada wing-shaped high heat flux density bionic microchannel 4 can be 3mm thick.

[0044] A first three-way valve 9 is connected to the liquid outlet pipe of the low-temperature medium storage tank 8, and one liquid outlet of the first three-way valve 9 is connected to a second pipe 10, and one end of the second pipe 10 not connected to the first three-way valve 9 is connected to the air isothermal compression chamber 2, and the other liquid outlet of the first three-way valve 9 is connected to a third pipe 11, and one end of the third pipe 11 not connected to the first three-way valve 9 is connected to the liquid inlet of the cicada-wing-shaped high heat flux density bionic microchannel 4; located between the first three-way valve 9 and the air isothermal compression chamber 2 and arranged on the second pipe 10, a first ultramicro solenoid valve 12, a first charged spray chamber 13 and a refrigeration nozzle 14 are sequentially connected, and the refrigeration nozzle 14 is fixed on the air isothermal compression chamber 2.

[0045] The compressed air energy release system includes an isothermal expander 15, a generator 16 and a fourth pipeline 17. The generator 16 is connected to the isothermal expander 15. When the isothermal expander 15 is started, the isothermal expander 15 is used to drive the air to drive the generator 16 to operate; the isothermal expander 15 is connected to the air storage tank 5 through the fourth pipeline 17; the isothermal expander 15 is connected to the heat exchanger 19 through the fifth pipeline 18, and the fifth pipeline 18 is also connected to the second gas-liquid separator 20. The air outlet pipe of the second gas-liquid separator 20 is connected to the outside. When the second gas-liquid separator 20 is started, the fifth pipeline 18 is used to discharge the liquid in the second gas-liquid separator 20. In some other embodiments, the surface of the air isothermal compression chamber 2 for connecting the third pipeline 11 is an inclined surface, and at least one layer of hydrophobic coating is coated on the inclined surface to guide the flow direction of the droplets so that they flow out as quickly as possible.

[0046] A second three-way valve 22 is connected to the liquid outlet pipe of the high-temperature medium storage tank 21, and a sixth pipe 23 is connected to one liquid outlet of the second three-way valve 22, and one end of the sixth pipe 23 not connected to the second three-way valve 22 is connected to the isothermal expander 15, and the other liquid outlet of the second three-way valve 22 is connected to the seventh pipe 24, and one end of the seventh pipe 24 not connected to the second three-way valve 22 is connected to the heat exchanger 19; located between the second three-way valve 22 and the isothermal expander 15 and arranged on the sixth pipe 23, a second ultra-micro solenoid valve 25, a second charged spray chamber 26 and a heating nozzle 27 are sequentially connected, and the heating nozzle 27 is fixed on the isothermal expander 15.

[0047] An eighth pipeline 29 is connected between one end of the nanofluid pipeline 28 and the cicada-wing high heat flux density bionic microchannel 4, a ninth pipeline 30 is connected between the first gas-liquid separator 6 and the eighth pipeline 29, and the ninth pipeline 30 is used to discharge the liquid in the first gas-liquid separator 6 after the first gas-liquid separator 6 is started; a tenth pipeline 31 is connected between the other end of the nanofluid pipeline 28 and the heat exchanger 19, a third three-way valve 32 is connected to the liquid outlet of the heat exchanger 19, and an eleventh pipeline is connected to one of the liquid outlets of the third three-way valve 32 33, one end of the eleventh pipeline 33 not connected to the third three-way valve 32 is connected to the low-temperature medium storage tank 8, the other liquid outlet of the third three-way valve 32 is connected to the twelfth pipeline 34, and one end of the twelfth pipeline 34 not connected to the third three-way valve 32 is connected to the liquid outlet pipe of the low-temperature medium storage tank 8; a solar panel 35 is arranged around the nanofluid pipeline 28, and a circulation pump 36 is arranged in the nanofluid pipeline 28. When the circulation pump 36 is started, the circulation pump 36 is used to drive the liquid in the nanofluid pipeline 28 to circulate. The fluid flow channel height of the nanofluid pipeline 28 is at least 4mm.

[0048] The control system includes a main controller 37, a high-voltage electrostatic generator 38 and a nanofluid pipeline controller 39. The main controller is electrically connected to the solar panel 35. When the main controller 37 is started, the main controller 37 is used to control the start and stop of the high-voltage electrostatic generator 38 and the nanofluid pipeline controller 39; the main controller 37 is electrically connected in parallel with the high-voltage electrostatic generator 38 and the nanofluid pipeline controller 39. The high-voltage electrostatic generator 38 includes a first circuit and a second circuit in parallel, which are used to detect and control the connecting elements on the first circuit and the second circuit. The first circuit is connected in parallel with the first ultramicro solenoid valve 12, the needle electrode in the first charged spray chamber 13 and the first temperature probe, and the first temperature probe is located in the air isothermal compression chamber 2. The second circuit is connected in parallel with the second ultramicro solenoid valve 25, the needle electrode in the second charged spray chamber 26 and the second temperature probe, and the second temperature probe is located in the isothermal expander 15; the nanofluid pipeline controller 39 is electrically connected to the circulation pump 36, which is used to detect and control the circulation pump 36.

[0049] In some embodiments, a piston 40 is provided in the air isothermal compression chamber 2, and when the motor 1 is started, the piston 40 is used to compress the dry air in the air isothermal compression chamber 2; the surface of the piston 40 close to the dry air is covered with a first conductor 41, and the first conductor 41 is grounded; a second conductor 42 is provided at the outlet of the air isothermal compression chamber 2 for connecting to the first pipeline 3, and the second conductor 42 is used to form an electric field with the first conductor 41.

[0050] In the air isothermal compression chamber 2, the first conductor 41 and the second conductor 42 can cooperate to form an electric field, and the electric field space is the air compression space, which can make the charged droplets migrate in a directional manner and strengthen the heat and mass exchange. The isothermal expander 15 is also provided with a corresponding conductor to achieve the same function.

[0051] In certain embodiments, the liquid in the nanofluidic conduit 28 is mixed with Ag@SiO 2 core-shell.

[0052] In some embodiments, mesh electrodes 43 are disposed on the outer surfaces of the first gas-liquid separator 6 and the second gas-liquid separator 20 .

[0053] In some embodiments, the gas-liquid separation flow channels in the first gas-liquid separator 6 and the second gas-liquid separator 20 are spirally shaped and arranged on the inner surface.

[0054] In some embodiments, the first ultra-micro solenoid valve 12 and the second ultra-micro solenoid valve 25 have the same structure and a working pulse width of not less than 5 ms.

[0055] In certain embodiments, a zeolite molecular sieve 44 is arranged inside the air storage tank 5 , and the gas capture capability of the zeolite molecular sieve 44 is improved after the zeolite molecular sieve 44 is subjected to ultrasonic aging and seed induction.

[0056] In some embodiments, a honeycomb flow channel 45 is arranged at the air inlet of the air isothermal compression chamber 2. When dry air is inhaled, the honeycomb flow channel 45 is used to reduce air humidity and improve the temperature control effect.

[0057] In a second aspect of an embodiment of the present invention, there is provided a method for an isothermal air compression energy storage device based on high-voltage electrostatic field-enhanced flash spray space heat dissipation, comprising:

[0058] Step 1: Turn on the motor 1 to draw dry air into the air isothermal compression chamber 2.

[0059] Step 2: The coolant in the low-temperature medium storage tank 8 is respectively delivered to the cicada-wing high heat flux bionic microchannel 4 and the first ultra-micro solenoid valve 12 through the first three-way valve 9; the first ultra-micro solenoid valve 12 is adjusted to control the coolant flow rate, and the coolant is delivered to the first charged spray chamber 13; the main controller 37 controls the high-voltage electrostatic generator 38 to start the needle-shaped electrode in the first charged spray chamber 13 and generate corona, promote the coolant droplet to break and charge, and adjust the coolant droplet size. The coolant can be water.

[0060] Step three: start the piston 40 to compress the air, and the first temperature probe detects the temperature of the compressed air. When the temperature reaches the required temperature, in some embodiments, the set temperature range is when the temperature exceeds 1% of the required temperature. The main controller 37 controls the first ultra-micro solenoid valve 12 to adjust the opening, so that the coolant droplets are transported from the first charged spray chamber 13 to the refrigeration nozzle 14 for flash evaporation and spraying. At this time, the gas and liquid in the air isothermal compression chamber 2 quickly produce heat exchange, and the first conductor 41 and the second conductor 42 form an electric field to enhance the gas-liquid heat and mass exchange, while promoting the migration and deposition of droplets for subsequent extraction; at the same time, the coolant in the cicada-wing-shaped high heat flux density bionic microchannel 4 keeps flowing, maintains the temperature stability in the air isothermal compression chamber 2, and cooperates with the flash spray sprayed by the refrigeration nozzle 14 to realize air isothermal compression energy storage.

[0061] Step 4: Open the air outlet of the air isothermal compression chamber 2 to discharge the air. The air carries the trace coolant droplets released during the compression process into the first gas-liquid separator 6 with a mesh electrode 43 and the mesh electrode 43 has been activated. Under the action of the electric field coupling, the trace coolant droplets in the air are quickly captured to achieve gas-liquid separation; the coolant separated from the first gas-liquid separator 6 enters the ninth pipeline 30 and meets the eighth pipeline 29 connected to the cicada-wing-shaped high heat flux density bionic microchannel 4. The mixed coolant enters the nanofluid pipeline 28 through the eighth pipeline 29; the high-pressure air separated from the first gas-liquid separator 6 is dried by the dryer 7 and then enters the air storage tank 5 to complete the high-pressure air storage.

[0062] Step 5: Continuously start the solar panel 35, the circulating pump 36 and the heat exchanger 19, the coolant liquid entering the nanofluid pipe 28 cooperates with the nanoparticles in the nanofluid pipe 28 to pass through the solar panel 35, the coolant absorbs heat, the temperature rises, and part of the high-temperature coolant flows out when passing through the tenth pipe 31; the remaining coolant circulates in the nanofluid pipe 28 under the drive of the circulating pump 36; the outflowing high-temperature coolant increases the temperature through the heat exchanger 19, flows through the sixth pipe 23 through the second three-way valve 22, enters the second ultra-micro solenoid valve 25, and then enters the second charged spray chamber 26; the coolant droplets pass through the corona from the second charged spray chamber 26 to the heating nozzle 27, at this time, the high-pressure air stored in the air storage tank 5 enters the isothermal expander 15 through the fourth pipe 17, and is flash-sprayed by the heating nozzle 27 to release the latent heat of the droplets. The isothermal expander 15 has the same electric field structure as the air isothermal compression chamber 2, and the gas-liquid heat exchange is enhanced, and the droplets are quickly collected.

[0063] The mechanism of this process is the same as that in the air isothermal compression chamber 2, both of which use the latent heat of droplets to control the temperature of the air working process. The compression process is accompanied by temperature rise, so low-temperature coolant is used for flash spraying and charging to complete the work and collection. The air expansion process is accompanied by a decrease in temperature, so high-temperature coolant is used for flash spraying and charging to release heat to the environment to complete the work task and collection requirements. The charging effect can enhance the heat absorption and release phenomenon, facilitate the collection of working fluids and the separation of gas and liquid, and achieve the requirements with minimal energy consumption. The coolant liquid entering the nanofluid pipeline 28 cooperates with the nanoparticles to absorb the specific spectrum energy of solar energy in the process of passing through the solar panel 35, maintain the constant temperature of the photovoltaic panel, and ensure the photoelectric conversion efficiency.

[0064] Step six: the isothermal expander 15 drives the isothermal air to drive the generator 16 to operate; the gas that has completed the work is discharged from the fifth pipeline 18, and the carried droplets pass through the second gas-liquid separator 20. The gas passing through the second gas-liquid separator 20 is discharged to the outside through the outlet of the second gas-liquid separator 20, and the coolant enters the heat exchanger 19 through the fifth pipeline 18. The coolant in the heat exchanger 19 passes through the third three-way valve 32 connected to the outlet of the heat exchanger 19. The third three-way valve 32 is used to make the coolant flow through the eleventh pipeline 33 and introduced into the low-temperature medium storage tank 8 for storage, or introduced into the twelfth pipeline 34 to participate in the next air isothermal compression process.

[0065] In the above steps, the heat exchanger 19 can transfer the heat of the low-temperature coolant to the high-temperature coolant, increase the temperature of the higher-temperature coolant and reduce the temperature of the lower-temperature coolant, and pass the required coolant into the required compression and expansion components. Among them, when the system compressor does not work or the operating point is low, the third three-way valve 32 changes the valve opening to pass the coolant into the low-temperature medium storage tank 8 for storage; similarly, when the system expander does not work or the operating point is low, the second three-way valve 22 adjusts the valve opening to store the excess high-temperature coolant into the high-temperature medium storage tank 21, thereby completing the fine circulation of the coolant.

[0066] In some embodiments, the flash spray time is continuously changed according to the refrigeration demand, so it is necessary to maintain the temperature in the air isothermal compression chamber 2 to be stable within a range of 99% to 101% of the required temperature.

[0067] In summary, the present invention provides an isothermal air compression energy storage device and method based on high-voltage electrostatic field-enhanced flash spray spatial heat dissipation. The ultra-micro solenoid valve is used to accurately control the coolant flow parameters, and the high-voltage electrostatic generator is combined to achieve fine droplet fragmentation and charging, which further increases the gas-liquid contact area during air compression and expansion, and improves the heat exchange efficiency during air energy storage. Conductors are arranged at the air isothermal compression chamber 2, the piston 40 of the isothermal expander 15, and the outlet of the working fluid. The spatial electric field generated during the working process can enhance the heat and mass exchange between the droplets and the surrounding gas. The amount of refrigerant is greatly reduced, and the cooling and heating efficiency is improved; at the same time, the refrigerant can be deposited in a targeted manner, which is convenient for the recovery of the coolant and avoids the volatilization of the liquid affecting the thermophysical properties of the air. In combination with the principle of bionics, a special cicada wing-shaped high heat flux density bionic microchannel 4 is arranged for the air isothermal compression chamber 2. The channel maximizes the cooling capacity of the coolant, further recovers the excess low-quality thermal energy, ensures the thermal uniformity during the air compression process, and avoids the influence of the external ambient temperature on the compression condition. Taking full advantage of the charging performance of the droplets, the mesh electrode 43 of the gas-liquid separation device is arranged at the outermost periphery, and the gas-liquid separation channel is in a spiral shape. When the coolant droplets enter the gas-liquid separation device with the air, the gas-liquid efficient separation can be achieved under the combined action of the electric field traction force generated by the outer mesh electrode 43 and the centrifugal force of the rotation process. The solar photovoltaic panel is used as the energy source of the system, and the nanofluid pipeline 28 is designed around the photovoltaic panel to make full use of solar energy of different wavelengths, mix the coolant after cooling work with the nanoparticles, and maintain the temperature of the solar panel 35 constant while absorbing the energy of a specific wavelength, thereby improving the photoelectric conversion efficiency of the system. The high-temperature refrigeration liquid is used in the isothermal expansion process of the air to achieve efficient utilization of multi-quality energy and facilitate the stable operation of the energy storage device. The present invention can be applied to various environments and regions, and can achieve efficient energy storage, especially in areas lacking stable electricity but with abundant solar energy resources. In these areas, the isothermal air compression energy storage device based on high-voltage electrostatic field-enhanced flash spray space heat dissipation can achieve self-supply of system operation energy during the day, and the multi-composite process can convert low-quality electrical energy into high-quality electrical energy demand. Moreover, the energy consumption required during the system's self-operation process is extremely low, and it has considerable economic benefits and energy advantages.

[0068] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. An isothermal air compression energy storage device based on high-voltage electrostatic field-enhanced flash spray space heat dissipation, comprising an air compression energy storage system, a low-temperature medium storage tank, a compressed air energy release system, a high-temperature medium storage tank, an air storage tank, a heat exchanger, a nanofluid pipeline and a control system, It is characterized in that The air compression energy storage system comprises an electric motor, an air isothermal compression chamber and a first pipeline, wherein the electric motor is connected to the air isothermal compression chamber, and when the electric motor is started, the electric motor is used to open the air inlet of the air isothermal compression chamber and inhale dry air; a cicada wing-shaped high heat flux density bionic microchannel is arranged on the inner circumference of the air isothermal compression chamber, the air isothermal compression chamber is connected to the air storage tank through the first pipeline, and a first gas-liquid separator and a dryer are sequentially connected and arranged between the air isothermal compression chamber and the air storage tank and on the first pipeline; A first three-way valve is connected to the liquid outlet pipe of the low-temperature medium storage tank, a liquid outlet of the first three-way valve is connected to a second pipe, an end of the second pipe not connected to the first three-way valve is connected to the air isothermal compression chamber, another liquid outlet of the first three-way valve is connected to a third pipe, an end of the third pipe not connected to the first three-way valve is connected to the liquid inlet of the cicada-wing type high heat flux density bionic microchannel; a first ultra-micro solenoid valve, a first charged spray chamber and a refrigeration nozzle are sequentially connected and arranged between the first three-way valve and the air isothermal compression chamber and on the second pipe, and the refrigeration nozzle is fixed on the air isothermal compression chamber; The compressed air energy release system includes an isothermal expander, a generator and a fourth pipeline, wherein the generator is connected to the isothermal expander, and when the isothermal expander is started, the isothermal expander is used to drive air to drive the generator to operate; the isothermal expander is connected to the air storage tank through the fourth pipeline; the isothermal expander is connected to the heat exchanger through the fifth pipeline, and the fifth pipeline is also connected to a second gas-liquid separator, and the gas outlet pipe of the second gas-liquid separator is connected to the outside, and when the second gas-liquid separator is started, the fifth pipeline is used to discharge the liquid in the second gas-liquid separator; A second three-way valve is connected to the liquid outlet pipe of the high-temperature medium storage tank, one liquid outlet of the second three-way valve is connected to a sixth pipeline, one end of the sixth pipeline not connected to the second three-way valve is connected to the isothermal expander, and another liquid outlet of the second three-way valve is connected to a seventh pipeline, one end of the seventh pipeline not connected to the second three-way valve is connected to the heat exchanger; a second ultra-micro solenoid valve, a second charged spray chamber and a heating nozzle are sequentially connected and arranged on the sixth pipeline between the second three-way valve and the isothermal expander, and the heating nozzle is fixed on the isothermal expander; An eighth pipeline is connected between one end of the nanofluid pipeline and the cicada-wing high heat flux bionic microchannel, a ninth pipeline is connected between the first gas-liquid separator and the eighth pipeline, and the ninth pipeline is used to discharge the liquid in the first gas-liquid separator after the first gas-liquid separator is started; a tenth pipeline is connected between the other end of the nanofluid pipeline and the heat exchanger, a third three-way valve is connected to the liquid outlet of the heat exchanger, an eleventh pipeline is connected to one liquid outlet of the third three-way valve, an end of the eleventh pipeline not connected to the third three-way valve is connected to the low-temperature medium storage tank, and another liquid outlet of the third three-way valve is connected to a twelfth pipeline, and an end of the twelfth pipeline not connected to the third three-way valve is connected to the liquid outlet pipe of the low-temperature medium storage tank; a solar panel is arranged around the nanofluid pipeline, and a circulation pump is arranged in the nanofluid pipeline, and when the circulation pump is started, the circulation pump is used to drive the liquid in the nanofluid pipeline to circulate; The control system includes a main controller, a high-voltage electrostatic generator and a nanofluid pipeline controller. The main controller is electrically connected to the solar panel. When the main controller is started, the main controller is used to control the start and stop of the high-voltage electrostatic generator and the nanofluid pipeline controller; the main controller is electrically connected to the high-voltage electrostatic generator and the nanofluid pipeline controller in parallel. The high-voltage electrostatic generator includes a first circuit and a second circuit in parallel. The first circuit is connected in parallel to the first ultra-micro solenoid valve, the needle electrode in the first charged spray chamber and the first temperature probe, and the first temperature probe is located in the air isothermal compression chamber. The second circuit is connected in parallel to the second ultra-micro solenoid valve, the needle electrode in the second charged spray chamber and the second temperature probe, and the second temperature probe is located in the isothermal expander; the nanofluid pipeline controller is electrically connected to the circulation pump.

2. According to claim 1, an isothermal air compression energy storage device based on high-voltage electrostatic field enhanced flash spray space heat dissipation, It is characterized in that A piston is arranged in the air isothermal compression chamber, and when the motor is started, the piston is used to compress the dry air in the air isothermal compression chamber; a first conductor is covered on the surface of the piston close to the dry air, and the first conductor is grounded; a second conductor is arranged at the outlet of the air isothermal compression chamber for connecting to the first pipeline, and the second conductor is used to form an electric field with the first conductor.

3. According to claim 2, an isothermal air compression energy storage device based on high-voltage electrostatic field enhanced flash spray space heat dissipation, It is characterized in that The liquid in the nanofluid channel is mixed with Ag@SiO 2 Nucleocapsid.

4. According to claim 3, an isothermal air compression energy storage device based on high-voltage electrostatic field-enhanced flash spray space heat dissipation, It is characterized in that Mesh electrodes are arranged on the outer surfaces of the first gas-liquid separator and the second gas-liquid separator.

5. According to claim 4, an isothermal air compression energy storage device based on high-voltage electrostatic field enhanced flash spray space heat dissipation, It is characterized in that The gas-liquid separation flow channels in the first gas-liquid separator and the second gas-liquid separator are spirally shaped and arranged on the inner surface.

6. According to claim 5, an isothermal air compression energy storage device based on high-voltage electrostatic field-enhanced flash spray space heat dissipation, It is characterized in that The first ultra-micro solenoid valve and the second ultra-micro solenoid valve have the same structure and a working pulse width of not less than 5 ms.

7. According to claim 6, an isothermal air compression energy storage device based on high-voltage electrostatic field-enhanced flash spray space heat dissipation, It is characterized in that The air storage tank is provided with a zeolite molecular sieve, which is used to improve the gas capture capacity of the zeolite molecular sieve after ultrasonic aging and seed induction.

8. According to claim 7, an isothermal air compression energy storage device based on high-voltage electrostatic field-enhanced flash spray space heat dissipation, It is characterized in that The air inlet of the air isothermal compression chamber is arranged with a honeycomb flow channel, and when dry air is inhaled, the honeycomb flow channel is used to reduce air humidity and improve the temperature control effect.

9. A method for an isothermal air compression energy storage device based on high-voltage electrostatic field-enhanced flash spray space heat dissipation according to claim 8, It is characterized in that include: Step 1: Turn on the motor to draw dry air into the air isothermal compression chamber; Step 2: The coolant in the low-temperature medium storage tank is respectively transported to the cicada-wing type high heat flux density bionic microchannel and the first ultra-micro solenoid valve through the first three-way valve; the first ultra-micro solenoid valve is adjusted to control the coolant flow rate, and the coolant is transported to the first charged spray chamber; the main controller controls the high-voltage electrostatic generator to start the needle-shaped electrode in the first charged spray chamber and generate corona, promote the coolant droplet to break and charge, and adjust the coolant droplet size; Step 3: Start the piston to compress the air, and the first temperature probe detects the temperature of the compressed air. When the temperature reaches the required temperature, the main controller controls the first ultra-micro solenoid valve to adjust the opening, so that the coolant droplets are transported from the first charged spray chamber to the refrigeration nozzle for flash evaporation and spraying. At this time, the gas and liquid in the air isothermal compression chamber quickly exchange heat, and the first conductor and the second conductor form an electric field to strengthen the gas-liquid heat and mass exchange, while promoting the migration and deposition of droplets for subsequent extraction; at the same time, the coolant in the cicada-wing-shaped high heat flux density bionic microchannel keeps flowing, maintains the temperature in the air isothermal compression chamber stable, and cooperates with the flash spray sprayed by the refrigeration nozzle to realize air isothermal compression energy storage; Step 4: Open the air outlet of the air isothermal compression chamber to discharge the air, and the air carries the trace coolant droplets released during the compression process into the first gas-liquid separator with a mesh electrode and the mesh electrode has been activated. Under the action of electric field coupling, the trace coolant droplets in the air are quickly captured to achieve gas-liquid separation; the coolant separated from the first gas-liquid separator enters the ninth pipeline and meets the eighth pipeline connected to the cicada wing-shaped high heat flux density bionic microchannel, and the mixed coolant enters the nanofluid pipeline through the eighth pipeline; the high-pressure air separated from the first gas-liquid separator is dried by the dryer and then enters the air storage tank to complete the high-pressure air storage; Step 5: Continuously start the solar panel, the circulation pump and the heat exchanger, the coolant liquid entering the nanofluid pipeline cooperates with the nanoparticles in the nanofluid pipeline to pass through the solar panel, the coolant absorbs heat, the temperature rises, and part of the high-temperature coolant flows out when passing through the tenth pipeline; the remaining coolant circulates in the nanofluid pipeline under the drive of the circulation pump; the outflowing high-temperature coolant increases the temperature through the heat exchanger, flows through the sixth pipeline through the second three-way valve, enters the second ultra-micro solenoid valve, and then enters the second charged spray chamber; the coolant droplets pass through the corona from the second charged spray chamber to the heating nozzle, at this time, the high-pressure air stored in the air storage tank enters the isothermal expander through the fourth pipeline, and is flash-sprayed by the heating nozzle to release latent heat of the droplets. The isothermal expander and the air isothermal compression chamber have the same electric field structure to enhance gas-liquid heat exchange and quickly collect droplets; Step six: the isothermal expander drives the isothermal air to drive the generator to run; the gas that has completed the work is discharged from the fifth pipeline, and the carried droplets pass through the second gas-liquid separator. The gas passing through the second gas-liquid separator is discharged to the outside through the gas outlet of the second gas-liquid separator, and the coolant enters the heat exchanger through the fifth pipeline. The coolant in the heat exchanger passes through the third three-way valve connected to the liquid outlet of the heat exchanger. The third three-way valve is used to make the coolant flow through the eleventh pipeline and introduced into the low-temperature medium storage tank for storage, or introduced into the twelfth pipeline to participate in the next air isothermal compression process.

10. The method of an isothermal air compression energy storage device based on high-voltage electrostatic field-enhanced flash spray space heat dissipation according to claim 9, It is characterized in that The temperature in the air isothermal compression chamber is maintained to be stable within a range of 99% to 101% of the required temperature.

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