Energy Storage System for Energy-Saving Curtain Wall Based on Sodium-Ion Batteries

Abstract

The present invention discloses an energy-saving curtain wall energy storage system based on a sodium-ion battery, belonging to the technical field of intelligent curtain walls. In this system, photovoltaic glass is used as the outer layer of the double-layer curtain wall unit. Without affecting indoor lighting, it can directly convert light energy into electrical energy and input it into the energy storage unit for storage, providing electrical energy for the operation of the fan unit. In case of sufficient sunlight, it can also feed electricity back to the grid. In addition, by using the variation law of the power consumption of the fan unit, the variation law of the power generation of the double-layer curtain wall unit, and the stored electricity of the energy storage unit to plan the use of the power of the energy storage unit, on the one hand, it tries to minimize the use of the power grid to supply electricity to the fan unit, and on the other hand, when the power generation is large, on the premise of not affecting the normal power consumption of the fan unit, it tries to evenly feed the electricity in the energy storage unit back to the grid, reducing the impact of the power feeding of the energy storage unit on the grid.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent curtain walls, and specifically relates to an energy storage system for an energy-saving curtain wall based on sodium-ion batteries. Background Art

[0002] A double-layer curtain wall is composed of an inner and an outer facade structure, forming an air buffer layer between the indoor and outdoor spaces. It has good insulation and ventilation effects in practical applications. However, the ventilation effect of the double-layer curtain wall is not good under conditions of poor sunlight and small temperature differences. Moreover, in an environment with abundant sunlight and high outdoor temperature, since it will cause the indoor temperature to rise, its ventilation function cannot actually be used. Therefore, in order to maintain a suitable indoor temperature, refrigeration equipment needs to be involved. However, directly using refrigeration equipment for cooling does not make full use of the temperature difference between the inside and outside, resulting in more electrical energy consumption for cooling. Therefore, in order to solve the above problems, realize intelligent ventilation and temperature adjustment between the indoor and outdoor environments, improve the utilization efficiency of clean energy, and achieve the effect of energy conservation and emission reduction, the present invention provides the following technical solutions. Summary of the Invention

[0003] The purpose of the present invention is to provide an energy storage system for an energy-saving curtain wall based on sodium-ion batteries, which solves the problems in the prior art that the curtain wall does not make full use of clean energy and the ventilation and temperature adjustment between the indoor and outdoor are not intelligent.

[0004] The purpose of the present invention can be achieved by the following technical solutions:

[0005] An energy storage system for an energy-saving curtain wall based on sodium-ion batteries includes:

[0006] A double-layer curtain wall unit, including an inner glass curtain wall, an outer glass curtain wall, an air inlet at the bottom, and an air outlet at the top;

[0007] The outer glass curtain wall uses photovoltaic power generation glass, which converts solar energy into electrical energy and stores it in the energy storage unit;

[0008] An execution unit, which drives the air inlet, the air outlet, and the inner glass curtain wall to make opening adjustments;

[0009] An energy storage unit, which is used to store the electrical energy converted by the outer glass curtain wall;

[0010] A power monitoring unit, which is used to monitor the power generation power of the double-layer curtain wall unit and the power storage of the energy storage unit;

[0011] An environment monitoring unit, which is used to monitor the light intensity that affects the power generation efficiency of the double-layer curtain wall unit;

[0012] A fan unit, which is arranged at the air inlet and is used to accelerate the air flow rate between the inner glass curtain wall and the outer glass curtain wall;

[0013] A temperature detection unit for detecting the indoor temperature and the outdoor air temperature;

[0014] An air flow velocity detection unit is arranged at the air outlet of the double-layer curtain wall unit for detecting the air flow velocity at the air outlet of the double-layer curtain wall unit;

[0015] A weather forecast unit for predicting the light intensity for a period of time in the future and transmitting it to the controller;

[0016] A controller for controlling the working power of the fan and the execution unit according to the indoor temperature, the outdoor temperature and a preset optimal temperature value in the room;

[0017] It is also used to adjust the power consumption strategy of the energy storage unit.

[0018] As a further solution of the present invention, the method for the controller to control the working power of the fan and the execution unit includes the following steps:

[0019] The staff sets an optimal temperature value T for the indoor space;

[0020] Detect the indoor temperature T1 and the outdoor temperature T2 through the temperature detection unit;

[0021] When T1≥T:

[0022] If T2<T1 and T1-T2≥Ty holds, execute the first ventilation strategy;

[0023] If T2≥T1 or T1-T2<Ty holds, then execute the forced refrigeration strategy;

[0024] When T1<T:

[0025] If the controller executes the forced heat preservation strategy, then execute the forced heat preservation strategy;

[0026] If the controller does not execute the forced heat preservation strategy, then execute the second ventilation strategy;

[0027] The first ventilation strategy is to open the air inlet, the air outlet and the inner glass curtain wall through the execution unit, control the power of the fan unit to dissipate heat indoors, and introduce refrigeration equipment for cooling as needed;

[0028] The forced refrigeration strategy is to close the inner glass curtain wall through the execution unit and turn on the refrigeration equipment for indoor refrigeration;

[0029] The forced heat preservation strategy is to close the inner glass curtain wall through the execution unit, or turn on the heating equipment at the same time for indoor heating;

[0030] The second ventilation strategy is to open the air inlet, air outlet and the inner glass curtain wall through the execution unit, and control the power of the fan unit for ventilation, where Ty is a preset value.

[0031] As a further solution of the present invention, Ty is set to 4 degrees Celsius.

[0032] As a further solution of the present invention, the method for controlling the power of the fan unit in the first ventilation strategy is as follows:

[0033] S11. When T2 < T holds, the air velocity v at the air outlet of the double-layer curtain wall unit is obtained through the air velocity detection unit. If v ≥ v1, the fan unit is turned off; if v ≤ v1, the fan unit is turned on to increase the air velocity v at the air outlet of the double-layer curtain wall unit to v1. After the fan unit operates for a period of time, if T1 = T, at this time, the power of the fan unit and the opening degree of the inner glass curtain wall are adjusted to ensure that |T1 - T| ≤ Ty1 always holds;

[0034] S12. When T2 ≥ T holds, the air velocity v at the air outlet of the double-layer curtain wall unit is obtained through the air velocity detection unit. If v ≥ v1, the fan unit is turned off; if v ≤ v1, the fan unit is turned on to increase the air velocity v at the air outlet of the double-layer curtain wall unit to v1. After the fan unit operates for a period of time, if T1 - T2 ≤ Ty2 holds, at this time, the inner glass curtain wall is closed through the execution unit, and the refrigeration equipment is turned on for indoor refrigeration; where Ty1, Ty2 and v1 are all preset values; and Ty2 < Ty.

[0035] As a further solution of the present invention, after T = T1 holds, if T1 - T < 0, the power of the fan unit is preferentially reduced. After the fan unit stops completely, the opening degree of the inner glass curtain wall is adjusted; if T1 - T > 0, the opening degree of the inner glass curtain wall is preferentially adjusted. When the opening degree of the inner glass curtain wall reaches the maximum, the power of the fan unit is increased.

[0036] As a further solution of the present invention, the method for controlling the power of the fan unit in the second ventilation strategy is as follows:

[0037] Turn off the fan unit, and detect and obtain the air velocity v at the air outlet of the double-layer curtain wall unit through the temperature detection unit;

[0038] Calculate the opening coefficient K of the inner glass curtain wall according to the formula K = v*(T - T2);

[0039] Then, the opening degree λ of the inner glass curtain wall is calculated by the formula λ=(K1-K) / (K1-K2), where K1>K2. When the opening coefficient K is greater than or equal to K1, the inner glass curtain wall is completely closed. When the opening coefficient K is less than or equal to K2, the inner glass curtain wall is completely open;

[0040] Both K1 and K2 are preset values.

[0041] As a further solution of the present invention, the method for the controller to adjust the power consumption strategy of the energy storage unit includes the following steps:

[0042] Divide the time of a day into m temperature change cycles, and sequentially label these m temperature change cycles as B1, B2, …, Bm, 1≤i≤m;

[0043] According to the change trends of the light intensity and the outdoor temperature T2 within the temperature change cycle Bi obtained by the weather forecast unit, obtain the power generation amount P1 of the double-layer curtain wall unit and the power consumption amount P2 of the fan unit within the temperature change cycle Bi;

[0044] Obtain the actual stored power P3 and the full-load stored power P4 of the energy storage unit through the power monitoring unit;

[0045] When P2≥P1, mark the corresponding temperature change cycle as a decay cycle. If P2<P1, mark the corresponding temperature change cycle as an increase cycle;

[0046] Mark consecutive decay cycles as a continuous decay process;

[0047] Mark consecutive increase cycles as a continuous increase process;

[0048] When entering a continuous decay process, if P3-P5≥P2z-P1z holds, then throughout the continuous decay process, the fan unit is completely powered by the energy storage unit, and the energy storage unit does not connect to the grid. If P3-P5<P2z-P1z holds, then throughout the continuous decay process, first, the fan unit is completely powered by the energy storage unit until the stored power of the energy storage unit reaches P5, and then grid power is provided, and the energy storage unit does not connect to the grid;

[0049] When entering a continuous increase process, if P1-P2+P3>P4, the energy storage unit conducts power grid connection at a power of (P1-P2+P3-P4) / t1 during the continuous increase process and powers the fan unit through the energy storage unit. If P1-P2+P3≤P4, the energy storage unit powers the fan unit, and the energy storage unit does not connect to the grid;

[0050] Where P2z is the total power consumption of the fan unit during the entire decay process, P1z is the total power generation of the double-layer curtain wall unit during the entire decay process, and P5 is the preset minimum stored power.

[0051] Advantages of the present invention:

[0052] 1. By arranging a fan unit in the interlayer of the double-layer curtain wall unit, when the air flow rate between the interlayers is small due to reasons such as small temperature difference, the fan unit can actively work to accelerate the air flow rate between the double-layer curtain wall interlayers, thereby improving the ventilation efficiency;

[0053] 2. By monitoring the indoor temperature and the outdoor temperature, and according to the indoor temperature, the outdoor temperature and the preset optimal indoor temperature to carry out strategy conversion, realizing the opening adjustment of the inner glass curtain wall, the power adjustment of the fan unit and the opening control of the refrigeration equipment, and making full use of the temperature difference between the inside and the outside to adjust the indoor temperature as much as possible, so as to reduce the electric energy consumed in the refrigeration process and realize the efficient utilization of energy;

[0054] 3. By modifying the ventilation efficiency according to the difference between the external temperature and the preset optimal temperature value T and the air flow rate at the interlayer, avoiding the situation that the internal temperature drops too fast and too significantly due to unreasonable ventilation at low temperatures, which is not conducive to the comfort of ventilation;

[0055] 4. By using photovoltaic power generation glass as the outer layer of the double-layer curtain wall unit, while not affecting indoor lighting, it can directly convert light energy into electrical energy and input it into the energy storage unit for storage, providing electrical energy for the operation of the fan unit. In the case of sufficient light, it can also feed electricity into the grid. In addition, by planning the use of electrical energy in the energy storage unit according to the change law of the power consumption of the fan unit, the change law of the power generation of the double-layer curtain wall unit and the stored electrical energy in the energy storage unit, on the one hand, it tries to reduce the use of the grid to supply power to the fan unit as much as possible, and on the other hand, when the power generation is large, on the premise of not affecting the normal power consumption of the fan unit, it tries to evenly feed the electrical energy in the energy storage unit into the grid to reduce the impact of the electrical energy feeding of the energy storage unit on the grid. Specific embodiments

[0056] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0057] An energy storage system for an energy-saving curtain wall based on a sodium-ion battery, comprising:

[0058] A double-layer curtain wall unit, including an inner glass curtain wall, an outer glass curtain wall, an air inlet at the bottom and an air outlet at the top;

[0059] The outer glass curtain wall uses photovoltaic power generation glass, and the light transmittance of the outer glass curtain wall is 10%-50%. The photovoltaic power generation glass converts part of the solar energy into electrical energy and stores it in the energy storage unit;

[0060] An execution unit that can drive the air inlet, air outlet, and the inner glass curtain wall to adjust the opening degree;

[0061] An energy storage unit for storing the electrical energy converted by the outer glass curtain wall;

[0062] In an embodiment of the present invention, the energy storage unit is a sodium-ion battery;

[0063] A power monitoring unit for monitoring the power generation power of the double-layer curtain wall unit and the power storage of the energy storage unit;

[0064] An environment monitoring unit for monitoring the light intensity that affects the power generation efficiency of the double-layer curtain wall unit;

[0065] A fan unit is arranged at the air inlet to accelerate the air flow rate between the inner glass curtain wall and the outer glass curtain wall;

[0066] A temperature detection unit for detecting the indoor temperature and the outdoor air temperature,

[0067] An air flow rate detection unit is arranged at the air outlet of the double-layer curtain wall unit to detect the air flow rate at the air outlet of the double-layer curtain wall unit;

[0068] A weather forecast unit for predicting the light intensity for a period of time in the future and transmitting it to the controller;

[0069] The working method of the above energy storage system of the energy-saving curtain wall based on sodium-ion battery includes the following steps:

[0070] S1. The staff sets an optimal temperature value T for the indoor space;

[0071] Detect the indoor temperature T1 and the outdoor temperature T2 through the temperature detection unit;

[0072] When T1≥T:

[0073] If T2<T1 and T1 - T2≥Ty holds, execute the first ventilation strategy;

[0074] If T2≥T1 or T1 - T2<Ty holds, then execute the forced refrigeration strategy;

[0075] When T1<T:

[0076] If the controller executes the forced heat preservation strategy, then execute the forced heat preservation strategy;

[0077] If the controller does not execute the forced heat preservation strategy, then execute the second ventilation strategy;

[0078] The first ventilation strategy is to open the air inlet, air outlet and the inner glass curtain wall through the execution unit, control the power of the fan unit to dissipate heat indoors, and introduce refrigeration equipment for cooling as needed;

[0079] The forced refrigeration strategy is to close the inner glass curtain wall through the execution unit and turn on the refrigeration equipment to refrigerate indoors;

[0080] The forced heat preservation strategy is to close the inner glass curtain wall through the execution unit, or turn on the heating equipment simultaneously to heat indoors;

[0081] The second ventilation strategy is to open the air inlet, air outlet and the inner glass curtain wall through the execution unit and control the power of the fan unit for ventilation;

[0082] Where Ty is a preset value. In an embodiment of the present invention, Ty is taken as 4 degrees Celsius. Setting Ty can avoid executing the ventilation strategy when the indoor temperature T1 is close to the outdoor temperature T2, realizing the simplification of the ventilation program;

[0083] Among them, the method of controlling the power of the fan unit in the first ventilation strategy is:

[0084] S11. When T2 < T holds, obtain the air velocity v at the air outlet of the double-layer curtain wall unit through the air velocity detection unit. If v ≥ v1, then turn off the fan unit; if v ≤ v1, then turn on the fan unit to increase the air velocity v at the air outlet of the double-layer curtain wall unit to v1. After the fan unit works for a period of time, if T1 = T, at this time, adjust the power of the fan unit and the opening degree of the inner glass curtain wall, so as to ensure that |T1 - T| ≤ Ty1 always holds;

[0085] Specifically, after T = T1 holds, if T1 - T < 0, then preferentially reduce the power of the fan unit. After the fan unit stops completely, then adjust the opening degree of the inner glass curtain wall; if T1 - T > 0, then preferentially adjust the opening degree of the inner glass curtain wall. When the opening degree of the inner glass curtain wall reaches the maximum, then increase the power of the fan unit;

[0086] S12. When T2 ≥ T holds, obtain the air velocity v at the air outlet of the double-layer curtain wall unit through the air velocity detection unit. If v ≥ v1, then turn off the fan unit; if v ≤ v1, then turn on the fan unit to increase the air velocity v at the air outlet of the double-layer curtain wall unit to v1. After the fan unit works for a period of time, if T1 - T2 ≤ Ty2 holds, at this time, close the inner glass curtain wall through the execution unit and turn on the refrigeration equipment to refrigerate indoors;

[0087] Among them, Ty1, Ty2, and v1 are all preset values;

[0088] And Ty2 < Ty;

[0089] This method can make full use of the temperature difference between indoors and outdoors to cool the indoors, reducing the power consumption for refrigeration compared with the method of completely using refrigeration equipment for refrigeration;

[0090] Among them, the method of controlling the power of the fan unit in the second ventilation strategy is:

[0091] Turn off the fan unit, and use the temperature detection unit to detect and obtain the air velocity v at the air outlet of the double-layer curtain wall unit;

[0092] Calculate the opening coefficient K of the inner glass curtain wall according to the formula K = v*(T - T2);

[0093] Then calculate the opening λ of the inner glass curtain wall according to the formula λ = (K1 - K) / (K1 - K2), where K1 > K2. When the opening coefficient K is greater than or equal to K1, the inner glass curtain wall is completely closed. When the opening coefficient K is less than or equal to K2, the inner glass curtain wall is completely open;

[0094] Among them, both K1 and K2 are preset values.

[0095] This step modifies the ventilation efficiency according to the difference between the external temperature and the preset optimal temperature value T and the air flow velocity at the interlayer, avoiding unreasonable ventilation when the temperature is low, which may cause the internal temperature to drop rapidly and significantly, and is beneficial to the comfort of ventilation;

[0096] S3. Obtain the relationship between the power generation power and the light intensity of the double-layer curtain wall unit according to the data of the power generation power and the light intensity of the double-layer curtain wall unit changing with time;

[0097] Obtain the change trend of the light intensity in the future period according to the weather forecast unit;

[0098] Obtain the power generation power change curve of the double-layer curtain wall unit in the future period according to the change trend of the light intensity;

[0099] Obtain the relationship between the T2 - T value and the working power of the fan unit according to the data of the T2 - T value and the working power of the fan unit changing with time;

[0100] Obtain the change trend of the outdoor temperature T2 in the future period according to the weather forecast unit;

[0101] Obtain the working power change curve of the fan unit in the future period according to the change trend of the outdoor temperature T2;

[0102] S4. Divide the time of a day into m temperature change cycles, and label these m temperature change cycles as B1, B2, …, Bm in sequence, where 1 ≤ i ≤ m;

[0103] Obtain the power generation P1 of the double - layer curtain wall unit and the consumption P2 of the fan unit within the temperature change cycle Bi based on the change trends of the light intensity and the outdoor temperature T2 within the temperature change cycle Bi obtained by the weather forecast unit;

[0104] Obtain the actual stored power P3 and the full - load stored power P4 of the energy storage unit through the power monitoring unit;

[0105] When P2 is greater than or equal to P1, mark the corresponding temperature change cycle as a decay cycle; conversely, if P2 is less than P1, mark the corresponding temperature change cycle as a growth cycle;

[0106] Mark consecutive decay cycles as a continuous decay process;

[0107] Mark consecutive growth cycles as a continuous growth process;

[0108] When entering a continuous decay process, if P3 - P5 ≥ P2z - P1z holds, then throughout the continuous decay process, the energy storage unit completely powers the fan unit, and the energy storage unit does not feed electricity into the grid; if P3 - P5 < P2z - P1z holds, then throughout the continuous decay process, first the energy storage unit completely powers the fan unit until the stored power of the energy storage unit reaches P5, and then grid power is provided, and the energy storage unit does not feed electricity into the grid;

[0109] When entering a continuous growth process, if P1 - P2 + P3 > P4, the energy storage unit feeds electricity into the grid at a power of (P1 - P2 + P3 - P4) / t1 during the continuous growth process and powers the fan unit through the energy storage unit; if P1 - P2 + P3 ≤ P4, the energy storage unit powers the fan unit, and the energy storage unit does not feed electricity into the grid;

[0110] Where P2z is the total electricity consumption of the fan unit during the entire decay process, P1z is the total power generation of the double - layer curtain wall unit during the entire decay process, and P5 is the preset minimum stored power;

[0111] In the present invention, by using photovoltaic power generation glass as the outer layer of the double-layer curtain wall unit, while not affecting indoor lighting, the light energy can be directly converted into electrical energy and input into the energy storage unit for storage, providing electrical energy for the operation of the fan unit. In the case of sufficient light, power can also be fed into the grid. In addition, by planning the use of electrical energy in the energy storage unit according to the variation law of the power consumption of the fan unit, the variation law of the power generation of the double-layer curtain wall unit, and the stored electrical energy in the energy storage unit, on the one hand, the use of the grid to supply power to the fan unit is minimized as much as possible, and on the other hand, when the power generation is large, on the premise of not affecting the normal power consumption of the fan unit, the power fed into the grid in the energy storage unit is made as uniform as possible to reduce the impact of the power fed into the grid by the energy storage unit on the grid.

[0112] In the description of the specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0113] The above content is only an example and illustration of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, as long as they do not deviate from the invention or exceed the scope defined by the claims of the present invention, they should fall within the protection scope of the present invention.

Claims

1. An energy storage system for an energy-saving curtain wall based on a sodium-ion battery, characterized in that Including: A double - layer curtain wall unit, including an inner - layer glass curtain wall, an outer - layer glass curtain wall, an air inlet at the bottom, and an air outlet at the top; The outer - layer glass curtain wall adopts photovoltaic power - generation glass, converts solar energy into electric energy, and stores it in the energy - storage unit; An execution unit, driving the air inlet, the air outlet, and the inner - layer glass curtain wall to perform opening - degree adjustment; An energy - storage unit, used for storing the electric energy converted by the outer - layer glass curtain wall; A power - monitoring unit, used for monitoring the power - generation power of the double - layer curtain wall unit and the power storage of the energy - storage unit; An environment - monitoring unit, used for monitoring the light intensity affecting the power - generation efficiency of the double - layer curtain wall unit; A fan unit, arranged at the air inlet, used for accelerating the air - flow rate between the inner - layer glass curtain wall and the outer - layer glass curtain wall; A temperature - detection unit, used for detecting the indoor temperature and the outdoor air temperature; An air - flow - velocity detection unit, arranged at the air outlet of the double - layer curtain wall unit, used for detecting the air - flow velocity at the air outlet of the double - layer curtain wall unit; A weather - forecast unit, used for predicting the light intensity for a period of time in the future and transmitting it to the controller; A controller, used for controlling the working power of the fan and the execution unit according to the indoor temperature, the outdoor temperature, and a preset optimal indoor temperature value; It is also used for adjusting the power - consumption strategy of the energy - storage unit; The method for the controller to control the working power of the fan and the execution unit includes the following steps: The staff sets an optimal temperature value T for the indoor space; The indoor temperature T1 and the outdoor temperature T2 are detected through the temperature - detection unit; When T1≥T: If T2<T1 and T1 - T2≥Ty holds, execute the first ventilation strategy; If T2≥T1 or T1 - T2<Ty holds, then execute the forced - refrigeration strategy; When T1<T: If the controller executes the forced - heat - preservation strategy, then execute the forced - heat - preservation strategy; If the controller does not execute the forced - heat - preservation strategy, then execute the second ventilation strategy; The first ventilation strategy is to open the air inlet, the air outlet, and the inner - layer glass curtain wall through the execution unit, control the power of the fan unit to dissipate heat indoors, and introduce a refrigeration device for cooling as needed; The forced - refrigeration strategy is to close the inner - layer glass curtain wall through the execution unit and turn on the refrigeration device for indoor refrigeration; The forced - heat - preservation strategy is to close the inner - layer glass curtain wall through the execution unit, or turn on the heating device for indoor heating simultaneously; The second ventilation strategy is to open the air inlet, the air outlet, and the inner - layer glass curtain wall through the execution unit and control the power of the fan unit for ventilation, where Ty is a preset value; The method for controlling the power of the fan unit in the first ventilation strategy is: S11. When T2<T holds, obtain the air - flow velocity v at the air outlet of the double - layer curtain wall unit through the air - flow - velocity detection unit. If v≥v1, then turn off the fan unit; if v≤v1, then turn on the fan unit to increase the air - flow velocity v at the air outlet of the double - layer curtain wall unit to v1. After the fan unit works for a period of time, if T1 = T, at this time, adjust the power of the fan unit and the opening degree of the inner - layer glass curtain wall, so as to ensure that |T1 - T|≤Ty1 always holds; S12. When T2≥T holds, the air velocity v at the air outlet of the double-layer curtain wall unit is obtained through the air velocity detection unit. If v≥v1, the fan unit is turned off; if v≤v1, the fan unit is turned on to increase the air velocity v at the air outlet of the double-layer curtain wall unit to v1. After the fan unit has worked for a period of time, if T1 - T2≤Ty2 holds, the inner glass curtain wall is closed through the execution unit at this time, and the refrigeration equipment is turned on for indoor refrigeration; where Ty1, Ty2, and v1 are all preset values; and Ty2<Ty; After T = T1 holds, if T1 - T<0, the power of the fan unit is preferentially reduced. After the fan unit stops completely, the opening degree of the inner glass curtain wall is adjusted; if T1 - T>0, the opening degree of the inner glass curtain wall is preferentially adjusted. When the opening degree of the inner glass curtain wall reaches the maximum, the power of the fan unit is increased; The method for controlling the power of the fan unit by the second ventilation strategy is as follows: Turn off the fan unit, and detect and obtain the air velocity v at the air outlet of the double-layer curtain wall unit through the air velocity detection unit; Calculate the opening coefficient K of the inner glass curtain wall according to the formula K = v*(T - T2); Then calculate the opening degree λ of the inner glass curtain wall according to the formula λ=(K1 - K) / (K1 - K2), where K1>K2. When the opening coefficient K is greater than or equal to K1, the inner glass curtain wall is completely closed. When the opening coefficient K is less than or equal to K2, the inner glass curtain wall is completely opened; Both K1 and K2 are preset values.

2. The energy storage system for an energy-saving curtain wall based on a sodium-ion battery according to claim 1, wherein Ty takes a value of 4 degrees Celsius.