Fabricated turnover energy storage curtain wall system, preparation process and turnover control method

Abstract

The invention relates to an assembly type turnover energy storage curtain wall system, a preparation process and a turnover control method.The assembly type turnover energy storage curtain wall system comprises a curtain wall unit and a main keel, the curtain wall unit is installed on the main keel, the curtain wall unit comprises a photovoltaic panel, a phase change cold storage and release panel, a heat insulation core plate and a frame, the heat insulation core plate is located between the photovoltaic panel and the phase change cold storage and release panel, and the frame is located between the photovoltaic panel and the phase change cold storage and release panel. The photovoltaic panel, the heat insulation core plate and the phase change cold storage and release plate are sequentially fixed into a whole through the frame, and rotating shafts are integrally formed on the two opposite sides of the frame. The rotating shafts on the two sides of the curtain wall units are supported on the main keels through bearings. The energy-saving photovoltaic curtain wall has the advantages that photovoltaic power generation and phase change cold storage and release functions are integrated in the same curtain wall unit, multifunctional integration and an intelligent overturning mechanism of a building outer envelope structure are achieved, a photovoltaic panel is automatically switched to face outwards during daytime, power is efficiently generated, and an energy storage battery is charged; at night, the phase change cold storage and release plate is turned over to face outwards, cold energy is absorbed through low temperature at night and stored in the phase change material, and the cold energy is released next day to reduce the indoor air conditioner load.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building curtain wall, in particular to a fabricated reversible energy storage curtain wall system, a preparation process and a turning control method. BACKGROUND

[0002] With the development of green buildings and low-carbon cities, the functional requirements of building envelope have gradually developed from traditional heat preservation, waterproofing, and windproof to multifunctional integration, intelligent control, and sustainable operation. As an important part of the building facade, curtain walls not only bear the enclosure function, but also become the key carrier for buildings to achieve energy self-sufficiency and reduce operating energy consumption. In recent years, photovoltaic curtain wall technology has been widely used because it can convert solar energy into electricity, and it has shown good application prospects in high-rise and super high-rise buildings. However, the existing photovoltaic curtain wall systems generally have the problems of single function and low energy utilization efficiency: photovoltaic modules are usually fixed and installed outward, and only generate electricity during the day under light conditions, and are idle at night, failing to fully utilize the low-temperature environmental resources at night.

[0003] At the same time, phase change materials (PCM) are widely used in building energy storage systems due to their high energy storage density and nearly constant temperature phase change characteristics, which are used to smooth room temperature fluctuations and reduce air conditioning load. Existing phase change energy storage curtain walls embed phase change materials in the wall or curtain wall panel, which is fixed in position and cannot dynamically adjust its working mode according to environmental conditions. Such systems can release latent heat (or absorb cold) through the solidification of phase change materials at night to achieve cold storage, but are still exposed to high-temperature outdoor environments during the day, resulting in the loss of the stored cold before it is released due to the intrusion of external heat, significantly reducing the cold storage efficiency.

[0004] In addition, since the photovoltaic system and the phase change energy storage system are usually set up independently, it causes complex construction levels and cumbersome construction procedures, often involving a large amount of on-site wet work, which does not meet the requirements of industrialization, rapidity, and low pollution of fabricated buildings.

[0005] Based on this, the present application is proposed. SUMMARY

[0006] The present application aims to provide a fabricated reversible energy storage curtain wall system, a preparation process and a turning control method, which integrates photovoltaic power generation, dynamic cold storage and release, and intelligent control to improve energy utilization efficiency, and has the characteristics of modularity, dry connection, factory prefabrication, and on-site rapid assembly, realizing the functional integration and construction industrialization of building envelope.

[0007] In order to achieve the above-mentioned purpose, the technical solutions of the present application are as follows:

[0008] An assembled reversible energy storage curtain wall system, comprising a curtain wall unit and a main keel, the curtain wall unit is installed on the main keel, and the main keel is used for being fixed on the building facade; the curtain wall unit comprises: A photovoltaic panel, comprising a back plate and a cell fixed on the back plate; A phase change cold storage and release panel, which is a composite panel containing phase change microcapsules; An insulating core plate between the photovoltaic panel and the phase change cold storage and release panel; A frame that fixes the photovoltaic panel, the insulating core plate, and the phase change cold storage and release panel in sequence and integrally, and the frame is integrally formed with a rotating shaft on opposite sides; A plurality of main keels are arranged on the building facade in a crisscross manner to form a plurality of installation frames, the curtain wall unit is located in the installation frame, the installation frame is provided with an installation hole corresponding to the rotating shaft, a bearing seat is arranged in the installation hole, and the rotating shaft on both sides of the curtain wall unit is supported in the installation hole through the bearing; The main keel is provided with a driving unit, a control unit, and an energy storage unit, the driving unit rotates the curtain wall unit by driving the rotating shaft, the energy storage unit receives the converted electrical energy from the photovoltaic panel and outputs it to the corresponding electrical equipment, and the control unit issues an execution command to the driving unit to control the rotation of the curtain wall unit.

[0009] Further, the frame is made of a heat-insulating aluminum alloy frame, a heat-conducting rod one is integrated in the rotating shaft, a heat-conducting rod two is fixed in the frame, one end of the heat-conducting rod one extends out of the rotating shaft and enters the cavity of the main keel through the installation hole, the other end is located in the rotating shaft and connected with the heat-conducting rod two, and the heat-conducting rod two is in close contact with the back plate.

[0010] Further, the phase change cold storage and release panel is a UHPC panel containing phase change microcapsules, and the thickness is between 20-40 mm, and the phase change microcapsules are sodium sulfate decahydrate phase change microcapsules.

[0011] Further, the phase change cold storage and release panel comprises an outer layer plate, a middle layer plate, and an inner layer plate from outside to inside, each layer plate is a composite panel containing phase change microcapsules, and each layer plate is bonded and fixed, and the total thickness of the phase change cold storage and release panel is between 40-70 mm, and the phase change temperature of each layer plate decreases layer by layer from outside to inside.

[0012] Further, a heat-conducting layer is arranged between the outer layer plate and the middle layer plate and between the middle layer plate and the inner layer plate, and the heat-conducting layer is made of a nickel-plated metal mesh or a graphene carbon fiber composite sheet.

[0013] A preparation process for the above-mentioned phase change cold storage and release panel, The outer layer plate is a UHPC panel containing sodium sulfate decahydrate phase change microcapsules; The middle layer board is a polyurethane foaming board containing decanoic acid-lauric acid phase change microcapsules; The inner layer board is a diatomite matrix board containing n-octadecane phase change microcapsules, and the surface is coated with a nano-silicon dioxide hydrophobic coating; The preparation of the inner layer board includes the following steps: Add n-octadecane microcapsules to deionized water at a mass ratio of 20-30%, stir at low speed for 30 minutes to form a stable suspension; Mix diatomite powder and binder at a ratio of 7:3, add the stable suspension and stir evenly to form a mixed solution; Pour the mixed solution into the mold and cure to form a flat plate, then cut to the desired size after demolding; Apply nano-silicon dioxide sol to the outer surface by spraying or dipping, and dry at room temperature to form a hydrophobic layer; The preparation of the middle layer board includes the following steps: Add decanoic acid-lauric acid phase change microcapsules to component A at a content of 15-25 wt%, and stir evenly, where component A is a mixture of polyol, catalyst and foaming agent; Mix component A and isocyanate at a ratio of 0.9-1.1:1, pour into the mold at 25-30°C, and control the density of the obtained foam at 80-120 kg / m³ to form a closed-cell foam structure; After curing, demold and cut to the desired size; The preparation of the outer layer board includes the following steps: Surface modification treatment is performed on sodium sulfate decahydrate phase change microcapsules; Add the modified microcapsules to UHPC dry mix at 10-20 wt%, and dry mix evenly, where the UHPC dry mix is a mixture including cement, silica fume, quartz sand, steel fiber, and water reducing agent; Add water and stir, and control the water-binder ratio at 0.2-0.25; Pour into the mold, vibrate to compact, and cure to form; After demolding, cut to the desired size; The three-layer board composite integration includes the following steps: After removing dust from the surface of each layer board, spray a primer; Use heat-conducting silicone to bond the three layers in sequence to form a composite board; After bonding, cure for 24 hours, and coat sealant around the composite board.

[0014] Further, a heat-conducting layer is provided between the outer layer board and the middle layer board, and between the middle layer board and the inner layer board, the heat-conducting layer uses nickel-plated metal mesh or graphene carbon fiber composite sheet, and the outer layer board, heat-conducting layer, middle layer board, heat-conducting layer, and inner layer board are bonded in sequence by heat-conducting silicone to form a composite board.

[0015] A turning control method for the above-mentioned assembled reversible energy storage curtain wall system, comprising the following steps: When the indoor temperature is greater than the minimum phase change temperature of the phase change cold storage and release board, and The curtain wall unit is turned to make the photovoltaic panel face outward, wherein represents the current solar radiation intensity, represents the photovoltaic power generation starting threshold value; When , and the outdoor temperature is less than the maximum phase change temperature of the phase change cold storage and release board, the curtain wall unit is turned to make the phase change cold storage and release board face outward, wherein represents the photovoltaic power generation ending threshold value.

[0016] Further, if the power generation power within 1 hour after turning over the previous day is less than 50 W / m², the value of is increased by 20 W / m² on the current day, and if the power generation power within 1 hour after turning over the previous day is greater than 100 W / m², the value of is reduced by 20 W / m².

[0017] Further, if the solar radiation intensity is still greater than 150 W / m² 30 minutes after turning over the previous day, the value of is reduced by 20 W / m², and vice versa.

[0018] The advantages of the present application are:

[0019] 1. The photovoltaic power generation and the phase change cold storage and release function are innovatively integrated in the same curtain wall unit, realizing the multifunctional integration of the building envelope. The system adopts an intelligent turning mechanism, which automatically switches to the photovoltaic panel facing outward during the day to efficiently generate power and charge the energy storage battery; at night, the phase change cold storage and release board is turned to face outward to absorb cold at night and store it in the phase change material, which is released the next day to reduce the indoor air conditioning load. This "one-board dual-purpose" design significantly improves material utilization efficiency, effectively reduces building cooling and heating energy consumption and carbon emissions, and realizes the temporal and spatial optimization of energy allocation.

[0020] 2. The phase change cold storage and release layer adopts a "outer-middle-inner" three-layer gradient design, and different phase change temperature microcapsule materials are embedded: the outer layer is modified sodium sulfate decahydrate with a temperature of 25-28℃, the middle layer is decanoic acid-lauric acid eutectic with a temperature of 22-25℃, and the inner layer is n-octadecane microcapsule with a temperature of 20-22℃. At night, the curtain is turned over to expose the outer layer to the outdoor environment, and the high-temperature phase change material responds to the cooling environment first, freezing and storing cold layer by layer from the outside to the inside, fully utilizing the cold source of gradually decreasing temperature from evening to early morning; during the day, the curtain is reset, and the low-temperature phase change inner layer melts and absorbs heat first, realizing rapid cooling supply, and the middle and outer layers respond in turn, forming a gradient cooling release from the inside to the outside, significantly extending the effective cooling time and reducing the air conditioning peak load. High thermal conductivity materials (such as nickel-coated copper mesh or thermal pad) are arranged between the layers, and are bonded by thermal conductive structure glue, which not only ensures the structural integrity, but also avoids thermal resistance bottleneck. The frame uses heat-insulating aluminum alloy, and integrates a heat conduction rod system, effectively conducting the heat of the back plate to the main keel cavity, further improving the heat management capability.

[0021] 3. Based on the adaptive learning strategy, the parameters such as solar radiation intensity, phase change material temperature and outdoor environment temperature are comprehensively considered to intelligently decide the turning-over time. By dynamically adjusting the starting and ending thresholds of photovoltaic power generation, the system can continuously optimize the control strategy according to the actual operation effect of the previous day, adapt to different seasons, weather and light conditions, and significantly improve the stability and intelligence level of operation.

[0022] 4. The whole system adopts a full-dry assembly type construction method, with no welding and no wet work on site, which greatly improves the construction efficiency and reduces more than 80% of construction waste. All electrical connections can be connected by quick plug terminals, and key components such as drive motors and energy storage batteries are designed in a modular way, which is convenient for later maintenance and replacement. It is not only suitable for high-rise and super high-rise buildings, but also provides a high-efficiency, intelligent and replicable envelope structure technology path for green and low-carbon buildings. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a three-dimensional structural schematic diagram of the assembly type reversible energy storage curtain system in Example 1;

[0024] Figure 2 FIG. 2 is a schematic diagram of the rotation state of the curtain unit in Example 1; Figure 1

[0025] Figure 3 FIG. 3 is a structural schematic diagram of the curtain unit in Example 1;

[0026] Figure 4 FIG. 4 is a schematic diagram of each layer of the phase change cold storage and release plate in Example 1;

[0027] Figure 5 FIG. 5 is a control logic diagram of the assembly type reversible energy storage curtain system in Example 1; REFERENCE NUMERALS​ 1. Curtain wall unit; 1011. Back panel; 1012. Solar cell; 102. Phase change cold storage and release plate; 1021. Outer layer plate; 1022. Middle layer plate; 1023. Inner layer plate; 1024. Thermal conductive layer; 103. Thermal insulation core plate; 104. Frame; 105. Rotating shaft; 106. Thermal conductive rod one; 107. Thermal conductive rod two; 108. Drive motor; 2. Main keel. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to embodiments. It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., used in this document indicate the orientation or positional relationship based on the coordinate system shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention. Example 1

[0029] This embodiment proposes a prefabricated, reversible energy storage curtain wall system, such as... Figure 1 As shown, the structure includes a curtain wall unit 1 and a main keel 2. The curtain wall unit 1 is mounted on the main keel 2, and the main keel 2 is used to fix it to the exterior facade of the building. This embodiment innovates on the curtain wall unit 1, such as... Figure 3 As shown, the structure includes a photovoltaic panel, a phase change cold storage and heat release plate 102, an insulation core panel 103, and a frame 104. The frame 104 sequentially fixes the photovoltaic panel, insulation core panel 103, and phase change cold storage and heat release plate 102 into a single unit, and rotating shafts 105 are integrally formed on opposite sides of the frame 104. Several main keels 2 are arranged crisscrossingly on the building facade to form several installation frames. The curtain wall unit 1 is located within the installation frames. The installation frames have mounting holes corresponding to the rotating shafts 105, and bearing seats are provided in the mounting holes. The rotating shafts 105 on both sides of the curtain wall unit 1 are supported in the mounting holes by bearings. The main keels 2 are equipped with a drive unit, sensors, a control unit, and an energy storage unit. The drive unit drives the rotating shafts 105 to rotate the curtain wall unit 1. The energy storage unit receives electrical energy converted from the photovoltaic panel and outputs it to the corresponding electrical equipment. The sensors are used to collect data such as temperature and light intensity. The control unit sends execution commands to the drive unit to control the rotation of the curtain wall unit 1.

[0030] The photovoltaic power generation and the phase change cold storage and release function are integrated in the same curtain wall unit 1, realizing the multifunctional integration of the building envelope. The system adopts an intelligent turnover mechanism, automatically switches to the photovoltaic panel outward during the day, efficiently generates electricity and charges the energy storage battery; at night, the phase change cold storage and release panel 102 is turned outward to absorb cold at night and store it in the phase change material, and release it the next day to reduce the indoor air conditioning load. This "one board with two functions" design significantly improves the material utilization efficiency, effectively reduces the cooling and heating energy consumption and carbon emissions of the building, and realizes the time and space optimization of energy.

[0031] As preferred, EPDM rubber strips can be arranged at the mounting frame formed by the longitudinally and transversely intersected keels or at the outer wall of the frame, to ensure the air tightness and water tightness after the turnover and locking.

[0032] The following describes the layers of the curtain wall unit 1 in detail:

[0033] The photovoltaic panel includes a back plate 1011 and cell pieces 1012 fixed on the back plate 1011, and is a commercially available panel. Since the photovoltaic panel has a very strong heat absorption capacity, the heat absorbed by the cell pieces 1012 will be conducted to the frame 104 through the back plate 1011, and may be conducted to the phase change cold storage and release panel 102 through the frame 104, forming a metal thermal bridge, which weakens the cold storage and release function of the phase change cold storage and release panel 102. As preferred, the frame 104 of the present embodiment adopts a heat break aluminum alloy frame 104 (or referred to as a broken bridge aluminum alloy frame 104), the core principle of which is to add a heat insulation cavity inside the profile and fill it with insulating material to block the heat transfer, so that the thermal conductivity coefficient is reduced by 40%-50% compared with the ordinary aluminum alloy frame 104.

[0034] Further, for better release of the heat energy absorbed by the photovoltaic panel, the present embodiment is integrated with a heat conduction rod one 106 in the rotating shaft 105, and a heat conduction rod two 107 is fixed in the frame 104, one end of the heat conduction rod one 106 extends out of the rotating shaft 105 and enters the cavity of the main keel 2 through the mounting hole, the other end is located in the rotating shaft 105 and connected with the heat conduction rod two 107, and the heat conduction rod two 107 is in close contact with the back plate 1011. The heat conduction structure can make part of the heat absorbed by the photovoltaic panel pass through the heat conduction rod two 107 and the heat conduction rod one 106 to the main keel cavity for release.

[0035] The heat insulation core plate 103 is located between the photovoltaic panel and the phase change cold storage and release panel 102, has a very low thermal conductivity, and is used to block the heat transfer between the two (i.e. to avoid the heat energy on the photovoltaic panel from being transferred to the phase change cold storage and release panel 102, and the cold energy absorbed on the phase change cold storage and release panel 102 from being released to the photovoltaic panel). Its design thickness is between 10-30 mm, and can adopt vacuum insulation panel VIP, aerogel composite board, etc.

[0036] As Figure 4As shown, the phase change cold storage and release panel 102 is a composite panel containing phase change microcapsules. In this embodiment, the phase change cold storage and release panel 102 comprises, from outside to inside, an outer panel 1021, a middle panel 1022, and an inner panel 1023, each of which is a composite panel containing phase change microcapsules, and each of which is bonded and fixed between the other panels. The overall thickness of the phase change cold storage and release panel 102 is between 40-70 mm, and the phase change temperature of each panel decreases from outside to inside. The phase change cold storage and release panel adopts a “outer-middle-inner” three-layer gradient design, and different phase change temperature microcapsule materials are embedded in each layer. At night, the outer layer is exposed to the outdoor environment after the curtain wall is turned over, and the high-temperature phase change material responds to the cooling environment first, and solidifies and stores cold from outside to inside layer by layer. The middle and inner layers take full advantage of the characteristics of gradually decreasing temperature from evening to early morning, and gradually start phase change to store cold. During the day, the curtain wall is reset, and the low-temperature phase change inner layer melts and absorbs heat first, achieving rapid cooling supply. The middle and outer layers respond in turn as the ambient temperature rises, forming a gradient cooling from inside to outside, significantly extending the effective cooling time and reducing the peak load of air conditioning.

[0037] Since the phase change cold storage and release panel 102 is provided with multiple layers of materials with different phase change temperatures, there may be response lag and cold accumulation between different layers. To ensure and improve the cold storage efficiency, cooling release speed, and cooling persistence of the phase change cold storage and release panel 102, a heat conducting layer 1024 is provided between the outer panel 1021 and the middle panel 1022, and between the middle panel 1022 and the inner panel 1023. The heat conducting layer 1024 is made of nickel-plated metal mesh or graphene carbon fiber composite sheet. The heat conducting layer 1024 builds a high-efficiency heat conducting path between the functional layers of the phase change cold storage and release panel 102, significantly improves the interlayer heat transfer rate, and ensures that cold energy is quickly solidified and stored layer by layer from outside to inside at night, and is sequentially melted and released from inside to outside in a gradient order during the day.

[0038] This embodiment provides a specific phase change cold storage and release panel and a preparation process of the panel, which are as follows.

[0039] In this embodiment, the outer panel is a UHPC panel containing sodium sulfate decahydrate phase change microcapsules, with a phase change temperature of 25-28°C. The middle panel is a polyurethane foaming panel containing decanoic acid-lauric acid phase change microcapsules, with a phase change temperature of 22-25°C. The inner panel is a diatomite matrix panel containing n-octadecane phase change microcapsules, with a phase change temperature of 20-22°C, and the surface of the inner panel is coated with a nano-silicon dioxide hydrophobic coating. The specific temperature of each layer can be adjusted according to the purity or concentration of the phase change microcapsules.

[0040] Since the outer layer plate needs to directly face the wind pressure, rain and snow, ultraviolet and severe temperature changes, it must have excellent structural strength and durability. UHPC (Ultra High Performance Concrete) has become an ideal protective matrix material due to its high compressive strength (≥ 150 MPa), good bending performance, and strong anti-permeability and weather resistance. At the same time, sodium sulfate decahydrate has a high phase change temperature and is suitable for use as a cold storage starting layer. It freezes first when the air temperature drops at night, transfers cold energy from the outside to the inside, and achieves efficient cold energy capture.

[0041] The middle layer plate mainly plays a role in heat buffering and gradient transition. Polyurethane foam material has a good closed-cell structure and bonding performance, which facilitates the uniform dispersion of microcapsules and the formation of a lightweight and stable composite system. This allows cold energy to be transferred orderly from the outer layer to the inside after solidification, avoiding thermal shock and delaying the release rhythm of cold energy, thereby improving the thermal inertia and regulation capacity of the system.

[0042] The diatomite-based inner layer plate has the characteristics of being lightweight, porous, and having a large specific surface area, which is beneficial to the high loading and thermal response of microcapsules. In addition, its low thermal conductivity can reduce the loss of cold energy to the back plate side, allowing cold energy to be released to the room first. To prevent moisture absorption of diatomite affecting the performance of PCM and the stability of the material, a nano-silicon dioxide hydrophobic coating is applied to the surface of diatomite, which can effectively block the intrusion of water vapor, prevent condensation and mold growth, and improve durability.

[0043] The preparation process is as follows:

[0044] S10. Preparation of the inner layer plate:

[0045] S11. Add n-octadecane microcapsules to deionized water at a mass ratio of 20-30%, stir at low speed for 30 minutes, and form a stable suspension;

[0046] S12. Mix diatomite powder and binder at a ratio of 7:3, add the stable suspension and stir uniformly to form a mixture;

[0047] S13. Pour the mixture into a mold and cure to form a flat plate. After demolding, cut it to the desired size;

[0048] S14. Apply a nano-silicon dioxide sol to the outer surface by spraying or dipping, and dry at room temperature to form a hydrophobic layer;

[0049] S20. Preparation of the middle layer plate:

[0050] S21. Add capric acid-lauric acid phase change microcapsules to component A at a content of 15-25 wt%, and stir uniformly, where component A is a mixture of polyol, catalyst and blowing agent;

[0051] S22. Mix component A and isocyanate in a ratio of 0.9-1.1:1, inject into the mold at 25-30℃, and let it stand to foam and form into a closed-cell foam structure with a density of 80-120 kg / m³;

[0052] S23. Demold after curing and cut to the desired size;

[0053] S30. Preparation of the outer layer plate (the preparation of the outer layer plate can refer to patent 202411794091.0):

[0054] S31. Surface modification treatment of sodium sulfate decahydrate phase change microcapsules;

[0055] S32. Add the modified microcapsules at 10-20 wt% to the UHPC dry mixture, and mix evenly, wherein the UHPC dry mixture is a mixture including cement, silica fume, quartz sand, steel fiber, and water reducing agent;

[0056] S33. Add water and stir, and control the water-binder ratio to be between 0.2-0.25;

[0057] S34. Pour into the mold, vibrate to compact, and cure to form;

[0058] S35. Demold and cut to the desired size;

[0059] S40. Three-layer plate composite integration:

[0060] S41. Spray primer after removing dust from the surface of each layer plate;

[0061] S42. Place a heat-conducting layer between the outer layer plate and the middle layer plate, and between the middle layer plate and the inner layer plate, the heat-conducting layer uses nickel-plated metal mesh or graphene carbon fiber composite sheet, and the outer layer plate, heat-conducting layer, middle layer plate, heat-conducting layer, and inner layer plate are sequentially bonded by heat-conducting silicone to form a composite plate;

[0062] S43. After bonding, cure for 24 hours, and coat sealant around the composite plate, the sealant can form a continuous waterproof barrier to effectively block moisture from entering from the cutting edge and interlayer gap.

[0063] The reversing control process of the assembled reversible energy storage curtain wall system of the present embodiment is based on the total control module (which can be set in the control room and communicates with the control unit on the keel), the clock module (which can be set in the control room), a plurality of temperature sensors (such as indoor temperature sensors, outdoor temperature sensors, and phase change cold storage and release plate temperature sensors), light sensors, etc. Collect natural data, compare the collected data with the set threshold value, and according to the control strategy, control the driving part through the control unit. The driving part can use a single curtain unit single motor control, or can use a synchronous wheel and synchronous belt to realize single motor synchronous control of multiple curtain units, such asFigure 2 As shown, the embodiment adopts a single curtain wall unit single motor control mode. The drive part is set as the existing conventional technology, which is not described here. It should be noted that in this embodiment, the energy storage unit (energy storage battery) adopts a lithium iron phosphate battery, and the capacity is designed at least according to "one-time power consumption × 4 (for rainy days)". The excess power can be connected to the grid or used for building load. In addition, the energy storage unit can be designed to be detachable and replaceable (such as setting a removable maintenance cover at the corresponding installation position of the keel, which is convenient for battery replacement).

[0064] As shown in Figure 5 The control strategy is as follows:

[0065] First, the daytime reversing time period and the nighttime reversing time period need to be defined in the clock module, such as the daytime reversing time period can be 5:00-10:00, and the nighttime reversing time period can be 17:00-22:00. At the same time, the curtain wall unit is set to only be able to reverse within these two time periods, and each time period can only be reversed once a day, so that the maximum number of reversals in a day is 2 (once in the daytime and once in the nighttime), which ensures that the number of reversals is not too many, and can improve the stability of the entire curtain wall system, and also ensures the comfort of office workers in the building (too many reversals affect office work);

[0066] When a round of judgment logic runs;

[0067] If it is judged to be in the daytime reversing time period, when the indoor temperature is greater than the lowest phase change temperature of the phase change cold storage release board (in this embodiment, the phase change cold storage release board has three phase change temperatures, and the lowest one is taken here), and , the curtain wall unit is reversed to make the photovoltaic panel face outward, where represents the current solar radiation intensity, represents the photovoltaic power generation start threshold;

[0068] If it is judged to be in the nighttime reversing time period, when , and the outdoor temperature is less than the highest phase change temperature of the phase change cold storage release board, the curtain wall unit is reversed to make the phase change cold storage release board face outward, where represents the photovoltaic power generation end threshold.

[0069] If it is not reversed within the reversing time period, it will not be reversed again, and waits for the next round of judgment logic to run.

[0070] As a preferred embodiment, the photovoltaic power generation start threshold and the photovoltaic power generation end threshold of the embodiment will be adaptively adjusted according to the weather conditions to improve the reliability of the control strategy, as follows:

[0071] If the power generation power within 1 hour after the previous day is less than 50W / m², the current day If the value of the solar radiation intensity is increased by 20 W / m2, and the power generation within 1 hour after the flip in the previous day is greater than 100 W / m2, then the power generation in the current day If the value of the solar radiation intensity is decreased by 20 W / m2 (i.e. in the morning, if the power generation is not high or too high after the flip, the photovoltaic power generation start threshold can be adjusted to delay or advance the flip time);

[0072] If the value of the solar radiation intensity is decreased by 20 W / m2 (i.e. in the morning, if the power generation is not high or too high after the flip, the photovoltaic power generation start threshold can be adjusted to delay or advance the flip time); If the value of the solar radiation intensity is decreased by 20 W / m2 (i.e. in the morning, if the power generation is not high or too high after the flip, the photovoltaic power generation start threshold can be adjusted to delay or advance the flip time); If the value of the solar radiation intensity is decreased by 20 W / m2 (i.e. in the morning, if the power generation is not high or too high after the flip, the photovoltaic power generation start threshold can be adjusted to delay or advance the flip time). Embodiment 2

[0073] The principle of this embodiment is basically the same as that of Embodiment 1, except for the design of the phase change cold storage release board. In Embodiment 1, the phase change cold storage release board has three layers of different phase change temperatures, which can prolong the release time and improve the release effect, but the cost of the board is high and the manufacturing process is complex. This embodiment gives a low-cost phase change cold storage release board, which has only one layer, which is a UHPC board containing phase change microcapsules, with a thickness of 20-40 mm. The phase change microcapsules use sodium sulfate decahydrate phase change microcapsules, with a phase change temperature of about 25°C, and the preparation process is referred to the preparation of the outer layer board in Embodiment 1.

[0074] The above embodiments are only used to explain the concept of the present application, and are not a limitation on the protection of the present application. Any non-essential modification of the present application using this concept shall fall within the scope of protection of the present application.

Claims

1. A prefabricated reversible energy-storing curtain wall system, comprising curtain wall units and a main rail, the curtain wall units being mounted on the main rail, the main rail being used to be fixed on the building facade; characterized in that, The curtain wall unit comprises: a photovoltaic panel comprising a backboard and a cell fixed on the backboard; a phase change cold storage and release panel, which is a composite panel containing phase change microcapsules; an insulating core board between the photovoltaic panel and the phase change cold storage and release panel; a frame that fixes the photovoltaic panel, the insulating core board and the phase change cold storage and release panel in sequence into an integrated body, and the frame is integrally formed with a rotating shaft on opposite sides; a plurality of main keels are arranged in a crisscross manner on the building facade to form a plurality of installation frames, the curtain wall unit is located in the installation frame, the installation frame is provided with an installation hole corresponding to the rotating shaft, a bearing seat is arranged in the installation hole, and the rotating shaft on the two sides of the curtain wall unit is supported in the installation hole through the bearing; the main keel is provided with a driving unit, a control unit and an energy storage unit, the driving unit rotates the curtain wall unit by driving the rotating shaft, the energy storage unit receives the electrical energy converted from the photovoltaic panel and outputs to the corresponding electrical equipment, and the control unit issues an execution command to the driving unit to control the rotation of the curtain wall unit.

2. The assembled and reversible energy-storing curtain wall system according to claim 1, wherein, The frame is made of heat-insulating aluminum alloy, a heat-conducting rod one is integrated in the rotating shaft, a heat-conducting rod two is fixed in the frame, one end of the heat-conducting rod one extends out of the rotating shaft and enters the cavity of the main keel through the installation hole, the other end is located in the rotating shaft and is connected with the heat-conducting rod two, and the heat-conducting rod two is in close contact with the backboard.

3. The assembled and reversible energy-storing curtain wall system according to claim 1, wherein, The phase change cold storage and release panel is a UHPC panel containing phase change microcapsules, and the thickness is between 20-40 mm, and the phase change microcapsules are sodium sulfate decahydrate phase change microcapsules.

4. The assembled and reversible energy-storing curtain wall system according to claim 1, wherein, The phase change cold storage and release panel comprises, in sequence from the outside to the inside, an outer layer panel, a middle layer panel and an inner layer panel, each layer panel is a composite panel containing phase change microcapsules, each layer panel is bonded and fixed, the total thickness of the phase change cold storage and release panel is between 40-70 mm, and the phase change temperature of each layer panel decreases layer by layer from the outside to the inside.

5. The prefabricated energy-storing and tiltable curtain wall system according to claim 4, characterized in that A heat-conducting layer is arranged between the outer layer panel and the middle layer panel and between the middle layer panel and the inner layer panel, and the heat-conducting layer is made of a nickel-plated metal mesh or a graphene carbon fiber composite sheet.

6. A preparation process of a phase change cold storage and release panel for use in the system of any one of claims 4 or 5, characterized in that: the outer layer panel is a UHPC panel containing sodium sulfate decahydrate phase change microcapsules; the middle layer panel is a polyurethane foaming panel containing decanoic acid-lauric acid phase change microcapsules; the inner layer panel is a diatomite matrix panel containing n-octadecane phase change microcapsules, and the surface is coated with a nano-silicon dioxide hydrophobic coating; the preparation of the inner layer panel comprises the following steps: n-octadecane microcapsules are added to deionized water at a mass ratio of 20-30%, and stirred at a low speed for 30 minutes to form a stable suspension; diatomite powder and a binder are mixed at a ratio of 7:3, the stable suspension is added and stirred uniformly to form a mixed liquid; the mixed liquid is poured into a mold and cured to form a flat plate, and the flat plate is cut to the required size after demolding; a nano-silicon dioxide sol is applied to the outer surface by spraying or dipping, and a hydrophobic layer is formed after drying at room temperature; the preparation of the middle layer panel comprises the following steps: The decanoic acid-lauric acid phase change microcapsules are added into component A at a content of 15-25 wt%, and stirred uniformly, wherein the component A is a mixture of polyol, catalyst and blowing agent; The component A and isocyanate are mixed at a ratio of 0.9-1.1:1, injected into a mold at 25-30°C, and left to foam and form into a closed-cell foam structure with a density of 80-120 kg / m³; After curing, the product is demolded and cut to a desired size; The three-layer composite integration includes the following steps: After removing dust from the surfaces of the layers, a primer is sprayed; The three layers are sequentially bonded to form a composite board using heat-conducting silicone glue; After bonding, the product is cured for 24 hours, and a sealant is applied around the composite board.

7. The process for preparing a phase change material cold storage and release panel according to claim 6, wherein: A heat-conducting layer is provided between the outer layer and the middle layer, and between the middle layer and the inner layer, the heat-conducting layer is made of nickel-plated metal mesh or graphene carbon fiber composite sheet, and the outer layer, heat-conducting layer, middle layer, heat-conducting layer, and inner layer are sequentially bonded to form a composite board using heat-conducting silicone glue.

8. A method for controlling the rotation of the assembled energy-storing curtain system according to any one of claims 1-5, comprising the following steps: When the indoor temperature is greater than the minimum phase change temperature of the phase change cold storage release board, and the flip curtain unit turns the photovoltaic board outward, wherein represents the current solar radiation intensity, represents the photovoltaic power generation starting threshold; When , and the outdoor temperature is less than the highest phase change temperature of the phase change cool storage release board, the curtain wall unit is flipped to make the phase change cool storage release board face outward, wherein represents a photovoltaic power generation end threshold.

9. The method of claim 8, wherein the method further comprises: If the power generated within 1 hour after the previous day's turnover is less than 50 W / m2, the value of the day is increased by 20 W / m2, and if the power generated within 1 hour after the previous day's turnover is greater than 100 W / m2, the value of the day is decreased by 20 W / m2.

10. The method of claim 8, wherein the method further comprises: If the solar radiation intensity is 30 minutes after the previous day's rotation... If it is still greater than 150 W / m², then The value decreases by 20 W / m², and vice versa.

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