Adjustable heat collection and storage composite wall and operation method and application thereof

Abstract

The invention discloses an adjustable heat collection and storage composite wall and an operation method and application. The adjustable heat collection and storage composite wall comprises a double-layer vertical sliding window arranged on the upper portion of a south facade window frame of a building and a turnover type phase change heat collection and storage wall arranged on the lower portion of the south facade window frame of the building. The double-layer vertical sliding window comprises a single-layer glass window and a vertical sliding window; the turnover type phase change heat collection and storage wall comprises a single-layer glass cover plate, a turnover phase change heat storage composite shutter wall and a ventilation channel capable of being opened and closed. In the daytime, the phase change layer of the phase change heat storage composite shutter wall faces outdoors, the shutter units are distributed in a staggered mode, and hot air flows indoors and outdoors; at night, the shutter units are turned over by 180 degrees, the phase change layer of the phase change heat storage composite shutter wall faces the indoor space, and all the shutter units are meshed with one another to prevent cold air from permeating into the indoor space. The heat preservation, heat collection and heat storage operation modes of the heat collection and heat storage composite wall are adjusted in different periods, so that the heat supply amount of the enclosure structure is better matched with the climate characteristics of a solar enrichment area.

Description

Technical Field

[0001] This invention relates to the field of solar building, and more particularly to a composite wall that can modify the heat collection, heat storage and heat insulation properties, as well as its operation method and application. Background Technology

[0002] Solar-powered building envelopes, such as direct-benefit windows, thermal collector walls, and attached sunrooms, are widely accepted by people in solar-rich areas, particularly the Qinghai-Tibet Plateau, due to their ease of maintenance and energy efficiency. They represent a suitable method for utilizing solar energy in high-altitude environments. Thermal collector walls and direct-benefit windows are primarily used in multi-story urban buildings, while attached sunrooms are more common in single-story buildings in urban and rural areas. However, traditional solar-powered building envelopes, due to their limited thermal performance capabilities, cannot meet the varying thermal performance requirements caused by temperature and radiation fluctuations.

[0003] Taking direct-benefit windows as an example, during the day, as much solar radiation as possible needs to be introduced into the room, requiring a high solar thermal gain coefficient. At night, better insulation performance is needed, requiring a low overall heat transfer coefficient. However, traditional glass windows struggle to achieve both a high solar thermal gain coefficient and a low heat transfer coefficient, making it difficult to balance heat collection and insulation. For heat-collecting and storage walls, convection heating primarily relies on ventilation openings. Convection heating has large peak values, significant fluctuations, and is concentrated mainly during the day. Nighttime heating relies on heat conduction through the wall structure. However, because outdoor temperatures are lower than indoor temperatures in winter, most of the heat stored in the storage wall is lost to the outside rather than conducted to the inside, resulting in a significant amount of stored heat not being utilized.

[0004] Therefore, there is an urgent need for an adjustable heat collection and storage composite wall, which is particularly suitable for the diurnal difference in thermal performance caused by the dual fluctuations in radiation temperature, characterized by high daytime comprehensive temperature and low nighttime air temperature in the solar-rich area of ​​the Qinghai-Tibet Plateau. This wall should be able to adjust the building envelope according to external climate changes and solve the problems of time-based structural insulation, heat collection, and heat storage. Summary of the Invention

[0005] To address the aforementioned deficiencies in existing technologies, the present invention aims to provide an adjustable heat collection and storage composite wall, its operation method, and its application. This composite wall adjusts its heat collection, heat storage, and insulation modes in different time periods to match changes in external climate and indoor environmental requirements, thereby maximizing solar energy utilization and laying the foundation for achieving zero-carbon buildings in solar-rich areas.

[0006] The present invention is achieved through the following technical solution.

[0007] In one aspect, the present invention provides an adjustable heat collection and heat storage composite wall, comprising a double-layer pull-out window located above the window frame on the south facade of a building and a flip-type phase change heat collection and heat storage wall located below. The double-layer pull-out window includes a single-layer glass window on the outside and a pull-out window on the inside that can slide longitudinally along the upper and lower parts of the window frame; The flip-type phase change heat collection and storage wall includes a single-layer glass cover plate located on the outside of the window frame, a flip-type phase change heat storage composite louver wall on the inside of the window frame, and an openable and closable ventilation channel. During daytime operation, the phase change layer of the phase change heat storage composite louver wall faces the outside, and the louver units are staggered, allowing hot air to circulate between the indoor and outdoor areas. During operation at night or on cloudy days with weak solar radiation, the louver units rotate 180°, with the phase change layer of the phase change heat storage composite louver wall facing the interior. The louver units interlock with each other to prevent cold air from penetrating in.

[0008] According to an exemplary embodiment of the present invention, the single-pane glass window is provided with a rotating sash.

[0009] According to an exemplary embodiment of the present invention, the pull-up window is installed inside the window frame and includes a fixed window sash and a sliding window sash. The fixed window sash is provided with an openable sash, and the sliding window sash is disposed on the slide groove of the window frame and slides longitudinally along the double-layer pull-up window and the flip-type phase change heat collection and storage wall.

[0010] According to an exemplary embodiment of the present invention, the flip-type phase change heat collection and storage wall is a frame structure, with a single-layer glass cover plate disposed on the outer frame of the frame and flush with the single-layer glass window, and a flip-type phase change heat storage composite louver wall disposed inside the frame and fixed vertically through an openable and closable ventilation channel.

[0011] According to an exemplary embodiment of the present invention, the reversible phase change thermal storage composite louver wall includes multiple louver units and a transmission system. Each louver unit includes a phase change layer, a structural layer, and an insulation layer. The louver units are connected in series and hinged at both ends by insulation baffles. The transmission system connects each louver unit through a transmission linkage to achieve rotation under different working conditions.

[0012] According to an exemplary embodiment of the present invention, the phase change layer and the insulation layer of the louver unit are fixed to the structural layer from the front and back by anchor bolts respectively; the outer surface of the phase change layer is coated with a solar radiation selective absorption coating.

[0013] According to an exemplary embodiment of the present invention, a heat-insulating soft baffle is provided on the closable ventilation channel at the bottom of the rotatable phase change heat storage composite louver wall.

[0014] According to an exemplary embodiment of the present invention, the transmission structure includes a stepper motor mounted at the bottom of the window frame, the output shaft of the stepper motor meshing with a transmission link, and a transmission gear provided on the transmission link corresponding to each louver unit position, the transmission gear meshing with a damping shaft fixed on the structural layer of each louver unit.

[0015] Another aspect of the present invention provides a method for operating the adjustable heat collection and storage composite wall, comprising: During daytime operation, when the outdoor solar radiation intensity is ≥300 W / m 2 At this time, the upper pull-out window is pulled down to the lower part of the window frame, and the single-layer glass window at the top of the window frame collects heat; the lower part of the window frame forms a single-layer glass cover plate + a reversible phase change heat storage composite louver wall + a double-layer ventilated glass curtain wall with pull-out windows. The phase change layer of each louver unit in the lower phase change heat storage composite louver wall is flipped to the outdoor side, and the insulation layer is obliquely distributed towards the indoor side; sunlight heats the phase change layer through the single-layer glass cover, and the heated phase change material heats the air in the air interlayer. The cool air inside the room exchanges heat with the warm air outside through an openable and closable ventilation duct before returning to the room. Operating conditions at night or on cloudy days with weak solar radiation, when the outdoor solar radiation intensity is <300 W / m 2 At this time, the upper pull-up window is pulled up to the top of the window frame, forming a low heat transfer coefficient combination window with single-pane glass + sealed air gap + double-pane glass at the top of the window frame; Each louver unit of the lower phase change heat storage composite louver wall is rotated 180°, the phase change layer is rotated to the indoor side, and the insulation layer faces the outdoor side, forming an external insulation and internal phase change structure.

[0016] The present invention, by adopting the above technical solution, has the following beneficial effects: 1. By adjusting the position of the pull-up window sash and the heat storage wall panel, the heat collection of the window and the heat storage of the wall can be enhanced during the day, and the heat insulation of the window and the heat supply of the wall can be enhanced at night.

[0017] 2. By adjusting the position of the sliding window, high heat collection and high insulation performance of the window can be achieved at different times. Traditional windows, to simultaneously achieve high... SHGC With low K This approach requires a significant cost, while this method can achieve time-segmented control of both needs at a lower cost.

[0018] 3. The position of the phase change layer can be changed by using a flip-out phase change heat storage composite wall panel, thereby reducing heat loss in the phase change heat storage layer at night while providing heat to the room, thus improving the nighttime thermal efficiency of the heat collection and storage wall.

[0019] 4. The surface of the heat storage wall is coated with a solar radiation selective absorption coating, which reduces the long-wave radiation reflected by the wall to the outside environment and reduces heat loss during the heat storage process.

[0020] 5. By adjusting the thermal performance of the building envelope to match the fluctuating outdoor solar radiation and air temperature characteristics of solar-rich areas, the thermal efficiency of passive solar building envelopes is improved. This addresses the problem of traditional solar building envelopes having fixed performance parameters that cannot adapt to changes in thermal performance requirements caused by climate fluctuations. It enables time-based optimization of the insulation, heat storage, and heat collection performance of solar-utilizing building envelopes. This adjustable heat collection and storage composite wall is suitable for application in the solar-rich areas of the Qinghai-Tibet Plateau. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, do not constitute an undue limitation of the invention. In the drawings: Figure 1 A schematic diagram of the adjustable heat collection and storage composite wall structure; Figures 2(a)-(d) are schematic diagrams of the structure and flipping method of the flipping phase change heat collection and storage wall; Figures 2(a) and 2(b) are the side and front cross sections of the flipping phase change heat collection and storage wall, respectively, and Figures 2(c) and 2(d) are schematic diagrams of the dynamic flipping process of the phase change heat storage composite louver wall. Figures 3(a) and (b) are schematic diagrams of the operation of the adjustable heat collection and storage composite wall, where Figure 3(a) is the daytime operation and Figure 3(b) is the nighttime or cloudy operation. Figure 4 A comparison of the operational performance of adjustable heat collection and storage composite walls with traditional structures.

[0022] Among them: 1. Single-pane glass window, 2. Double-pane pull-out window, 3. Pull-out window, 4. Partition plate, 5. Single-pane glass cover plate, 6. Phase change heat storage composite louver wall, 6-1. Phase change layer, 6-2. Structural layer, 6-3. Insulation layer, 6-4. Insulation baffle, 6-5. Insulation soft baffle, 6-6. Transmission bearing, 6-7. Transmission gear, 6-8. Support shaft, 6-9. Transmission connecting rod, 6-10. Stepper motor, 6-11. Damping rotating shaft, 7. Openable and closable ventilation channel, 7-1. Upper ventilation channel, 7-2. Lower ventilation channel. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention.

[0024] like Figure 1As shown, an adjustable heat collection and storage composite wall is installed on the south side of the building and used as the building envelope. It includes an upper double-layered pull-out window 2 and a lower flip-type phase change heat collection and storage wall, with a partition plate 4 between them. The double-layered pull-out window 2 includes a single-pane glass window 1 and a pull-out window 3. The flip-type phase change heat collection and storage wall includes a single-pane glass cover plate 5, a flip-type phase change heat storage composite louvered wall 6, and an openable / closable ventilation opening 7.

[0025] The double-pane pull-out window 2 consists of a single-pane glass window 1 with a high solar heat gain coefficient and a pull-out window 3 with a low heat transfer coefficient. The pull-out window 3 is installed inside the wall frame and can slide longitudinally along a groove installed on the inner surface of the wall frame and be suspended at any position. The single-pane glass window 1 is located on the outer surface of the wall.

[0026] For a single-pane glass window 1, the window is equipped with an operable sash that can be opened by rotating it to meet daily ventilation needs.

[0027] The pull-up window 3 is installed inside the window frame and consists of a fixed window sash and a sliding window sash. The fixed window sash is equipped with an openable sash, while the sliding window sash can slide longitudinally on the track and can be suspended at any position.

[0028] When solar radiation is strong during the day, the pull-up window 3 can be pulled down to the lower flip-type heat collection and storage wall, so that the upper part forms a direct benefit window for heat collection by the single-pane glass window 1; when there is no solar radiation at night, the pull-up window 3 can be raised to the window, and combined with the single-pane glass window 1 to form a combination window of single-pane glass + closed air gap + double-pane glass to enhance the window's nighttime heat preservation.

[0029] In one embodiment, the solar thermal gain coefficient of a single-pane window is not less than 0.82, and the heat transfer coefficient is not greater than 2.0 W / m². 2 •K, the thickness of the air gap between the single-pane glass window 1 and the pull-out window 3 is between 150mm and 250mm, and the ratio of the window area of ​​the pull-out window 3 to the window-to-wall area of ​​the south-facing wall is not greater than 0.5.

[0030] The window-to-wall area ratio of the pull-out window to the south-facing wall shall not exceed 0.5, and the solar thermal gain coefficient of the single-pane glass shall not be less than 0.82, while the heat transfer coefficient of the pull-out window shall not exceed 2.0 W / m². 2 • K. A single-pane window and a lift-up window have an air gap between them, with the thickness of the air gap ranging from 150mm to 250mm.

[0031] The long-wave emissivity of the solar radiation selective absorption coating is not greater than 0.1, and the solar radiation absorptivity is not less than 0.9.

[0032] As shown in Figure 2(a), the flip-type phase change heat collection and storage wall includes a single-layer glass cover plate 5 located on the outside of the window frame and flush with the single-layer glass window 1, a flip-type phase change heat storage composite louver wall 6 located on the inside of the single-layer glass window 1, and an openable and closable ventilation channel 7 set on the upper and lower sides of the flip-type phase change heat storage composite louver wall 6.

[0033] An air gap exists between the phase change heat storage composite louver wall 6 and the glass cover plate 5. The thickness of the air gap should not be less than the width of the composite louver unit.

[0034] As shown in Figure 2(b), the rotatable phase change heat storage composite louver wall 6 includes multiple louver units and a transmission system. Each louver unit includes a phase change layer 6-1, a structural layer 6-2, and an insulation layer 6-3. Several louver units are connected in series and hinged end to end by insulation baffles 6-4. Insulation baffles 6-5 are provided on the openable and closable ventilation channels 7 at the bottom of the series-connected louver units.

[0035] The phase change layer 6-1 and the insulation layer 6-3 of the louver unit are fixed to the structural layer 6-2 at the front and rear respectively by anchor bolts.

[0036] In one embodiment, the phase change temperature of the selected phase change material is between 28°C and 36°C, and the distance between the phase change louver and the outer single-layer glass cover should meet the minimum distance requirement when the phase change louver rotates.

[0037] To avoid affecting the rotation of the louvers and the convection heating of hot air during the day, the spacing between each louver should not exceed 30mm.

[0038] The transmission structure includes a transmission bearing 6-6, a transmission gear 6-7, a support shaft 6-8, a transmission connecting rod 6-9, a stepper motor 6-10, and a damping shaft 6-11.

[0039] A stepper motor 6-10 is installed at the bottom of the window frame. The output shaft of the stepper motor 6-10 meshes with a transmission link 6-9. A transmission gear 6-7 is provided on the transmission link 6-9 corresponding to the position of each louver unit. The transmission gear 6-7 meshes with the damping shaft 6-11 fixed on the structural layer 6-2 of each louver unit. When the stepper motor 6-10 rotates forward and backward, it drives the transmission link 6-9 to rotate. The transmission gear 6-7 meshes with the damping shaft 6-11, thereby driving each louver unit to flip.

[0040] The support shaft 6-8 is installed on the structural layer 6-2 of the louver unit and nested in the transmission bearing 6-6. The transmission bearing 6-6 is nested with the damping shaft 6-11. The damping shaft 6-11 can provide a certain resistance support when the composite louver rotates, resist the influence of the louver unit's own gravity on the rotation, and enhance stability.

[0041] Figures 2(c) and 2(d) illustrate the flipping process of the louver unit. The louver unit can achieve synchronous near-180° unidirectional rotation by driving the transmission linkage 6-9 via a stepper motor 6-10 installed at the bottom of the wall. During the day, the phase change layer 6-1 faces the outside, and the louver units are at a certain angle. When the louver units are driven by the stepper motor 6-10 and begin to rotate, the insulation layer 6-3 installed below the louver units will be staggered, forming a certain gap between the louver units to facilitate the passage of hot air (see Figure 2(c)). At night, after the louver units have flipped nearly 180°, the insulation layer 6-3 faces the outside. At this time, the series-connected louver units are at an angle perpendicular to the ground, and the insulation layers 6-3 also interlock to prevent cold air from penetrating in at night.

[0042] There is an openable and closable ventilation channel 7 at the top and bottom of the flip-type phase change heat collection and storage wall, including an upper ventilation port 7-1 and a lower ventilation port 7-2. Each ventilation channel has two ventilation ports, and the opening and closing status of the ventilation ports can be adjusted according to different ventilation conditions.

[0043] Figures 3(a) and (b) show schematic diagrams of the operating conditions of the adjustable heat collection and storage composite wall. The operating method of the adjustable heat collection and storage composite wall of this invention includes the following steps: First operating condition: Daytime operating condition: As shown in Figure 3(a), the solar radiation intensity during the day is greater than or equal to 300 W / m². 2 Under these conditions, for the upper double-layered pull-out window, the pull-out window 3 is pulled down to the lower half of the wall, and the upper part of the wall collects heat only through the single-layered glass window 1 with a high solar heat gain coefficient, thus improving the heat collection efficiency of the window.

[0044] For the lower half of the wall, since the pull-up window 3 is pulled down to the lower part of the wall, it forms a double-layer ventilated glass curtain wall structure with the single-layer glass cover plate 5 and the reversible phase change heat storage composite louver wall 6, which consists of a single-layer glass cover plate + reversible phase change heat storage composite louver wall + double-layer glass.

[0045] For this structure, the phase change layer 6-1 of each louver unit of the phase change thermal storage composite louver wall 6 will have a solar radiation intensity greater than 300 W / m during the day. 2 During certain periods, the phase change layer 6-1 is flipped to the outdoor side, while the insulation layer 6-3 faces the indoor side. During the day, sunlight heats the phase change layer 6-1 through the single-layer glass cover 5, and the heated phase change material can then heat the air in the air gap. At the same time, the cold air in the room can also enter the air channel through the lower ventilation duct 7-2 and exchange heat with the hot air in the air channel, and finally return to the room through the upper ventilation duct 7-1.

[0046] The outer surface of the phase change layer 6-1 is coated with a solar radiation selective absorption coating to ensure that it can heat up quickly when absorbing solar radiation. Because the long-wave radiation emissivity of the solar radiation selective absorption coating is low, the heat exchange with the outside after the temperature rises is less than that of ordinary black paint.

[0047] In addition, the six louver units of the phase change thermal storage composite louver wall can dynamically adjust their flip angle based on the solar altitude angle and the air temperature in the air gap to maximize the utilization of solar energy.

[0048] The second operating condition: Operating condition on cloudy days with no solar radiation at night or weak solar radiation: As shown in Figure 3(b), when the outdoor solar radiation intensity is <300 W / m 2 At that time, for the upper part of the composite wall, since the pull-up window 3 is raised to the window position, together with the single-pane glass window 1 on the outside, it forms a low heat transfer coefficient combination window of "single-pane glass + closed air gap + double-pane glass", which improves the overall window's nighttime heat preservation performance and reduces heat loss through the window at night.

[0049] For the lower section, the reversible phase change thermal storage composite louver wall will rotate 180°. At this time, the phase change layer 6-1 will face the indoor side, while the insulation layer 6-3 will face the outdoor side, thus forming an external insulation and internal phase change structure. This allows more heat stored in the phase change layer to be transferred indoors, reducing heat loss through the thermal storage wall at night and improving the thermal storage utilization rate. Furthermore, the upper and lower ventilation openings are also closed at this time, reducing heat loss caused by convective heat transfer through the ventilation openings. In cold winter nights, sealing strips can be installed in the openings of each reversible louver to further reduce heat loss at night.

[0050] like Figure 4 The image shows a comparison of the operational performance of the adjustable heat collection and storage composite wall structure with the traditional "upper direct benefit window + lower solid wall" structure.

[0051] Specifically, compared to the traditional "upper directly benefiting window + lower solid wall" structure, the use of an adjustable heat collection and storage composite wall, along with the operating method mentioned in this invention, can reduce nighttime heat loss by up to 1013.5 kJ·m³. 2 The phase change layer heating capacity was increased by 1268.6 kJ·m³. 2 Increased hot air heating capacity by 3414.8 kJ·m 2 .

[0052] This invention dynamically adjusts the heat collection, heat storage, and insulation performance of the building envelope by changing the position of the pull-up window and the angle of the phase change heat storage composite louver wall, thereby improving the efficiency of the building envelope in using solar energy for heating and addressing the performance defects of traditional building envelopes.

[0053] Adjustable heat collection and storage composite walls are used as building envelopes, usually on the south facade of buildings, and are not used as load-bearing components.

[0054] This invention is not limited to the above embodiments. Based on the technical solutions disclosed in this invention, those skilled in the art can make some substitutions and modifications to some of the technical features without creative effort, and all such substitutions and modifications are within the protection scope of this invention.

Claims

1. An adjustable heat collection and storage composite wall, characterized in that, This includes double-layered pull-out windows located above the window frames on the south facade of the building and a flip-type phase change heat collection and storage wall at the bottom; The double-layered lift-up window includes an outer single-layer glass window (1) and an inner lift-up window (3) that can slide longitudinally along the upper and lower parts of the window frame. The flip-type phase change heat collection and storage wall includes a single-layer glass cover plate (5) located on the outside of the window frame, a flip-type phase change heat storage composite louver wall (6) on the inside of the window frame, and an openable and closable ventilation channel (7). During daytime operation, the phase change layer of the phase change heat storage composite louver wall (6) faces the outside, and the louver units are staggered, allowing the hot airflow to circulate between the indoor and outdoor areas. During operation at night or on cloudy days with weak solar radiation, the louver units rotate 180°, with the phase change surface of the phase change heat storage composite louver wall (6) facing the interior. The louver units interlock with each other to prevent cold air from penetrating in.

2. The adjustable heat collection and storage composite wall according to claim 1, characterized in that, The single-pane glass window (1) is equipped with a rotating opening sash.

3. The adjustable heat collection and storage composite wall according to claim 1, characterized in that, The pull-up window (3) is installed inside the window frame and includes a fixed window sash and a sliding window sash. The fixed window sash is provided with an openable sash, and the sliding window sash is set on the slide groove of the window frame and slides longitudinally along the double-layer pull-up window and the flip-type phase change heat collection and storage wall.

4. The adjustable heat collection and storage composite wall according to claim 1, characterized in that, The flip-type phase change heat collection and storage wall is a frame structure. The single-layer glass cover (5) is set on the outer frame of the frame and is flush with the single-layer glass window (1). The phase change heat storage composite louver wall (6) is set inside the frame and is fixed at the top and bottom through the openable and closable ventilation channel (7).

5. The adjustable heat collection and storage composite wall according to claim 1, characterized in that, The phase change thermal storage composite louver wall (6) includes multiple louver units and a transmission system; Each louver unit includes a phase change layer (6-1), a structural layer (6-2), and an insulation layer (6-3). The louver units are connected in series and hinged at both ends through insulation baffles (6-4). The transmission system connects each louver unit through transmission linkage (6-9) to achieve rotation under different working conditions.

6. The adjustable heat collection and storage composite wall according to claim 5, characterized in that, The phase change layer (6-1) and the insulation layer (6-3) of the louver unit are fixed to the structural layer (6-2) at the front and back respectively by anchor bolts; the outer surface of the phase change layer (6-1) is coated with a solar radiation selective absorption coating.

7. An adjustable heat collection and storage composite wall according to claim 5, characterized in that, A heat-insulating soft baffle (6-5) is provided on the closable ventilation channel (7) at the bottom of the phase change heat storage composite louver wall (6).

8. An adjustable heat collection and storage composite wall according to claim 5, characterized in that, The transmission structure includes a stepper motor (6-10) installed at the bottom of the window frame, the output shaft of the stepper motor (6-10) meshing with a transmission link (6-9), and a transmission gear (6-7) provided on the transmission link (6-9) corresponding to each louver unit position. The transmission gear (6-7) meshes with a damping shaft (6-11) fixed on the structural layer (6-2) of each louver unit.

9. A method for operating an adjustable heat collection and storage composite wall as described in any one of claims 1-8, characterized in that, include: During daytime operation, when the outdoor solar radiation intensity is ≥300 W / m 2 At that time, the upper pull-up window (3) is pulled down to the lower part of the window frame, and the single-pane glass window (1) at the top of the window frame collects heat; The lower part of the window frame forms a single-layer glass cover (5) + a reversible phase change heat storage composite louver + a pull-out window (3) type double-layer ventilated glass curtain wall; The phase change layer (6-1) of each louver unit of the lower phase change heat storage composite louver wall (6) is flipped to the outdoor side, and the insulation layer (6-3) is obliquely distributed towards the indoor side; sunlight heats the phase change layer (6-1) through the single-layer glass cover plate (5), and the heated phase change material heats the air in the air interlayer. The cold air in the room exchanges heat with the hot air in the outside through the openable and closable ventilation channel (7) and then returns to the room; Operating conditions at night or on cloudy days with weak solar radiation, when the outdoor solar radiation intensity is <300 W / m 2 At that time, the upper pull-up window (3) is pulled up to the upper part of the window frame, and the upper part of the window frame forms a low heat transfer coefficient combination window of single glass + closed air gap + double glass; The lower phase change heat storage composite louver wall (6) has each louver unit rotated 180°, the phase change layer (6-1) is rotated to the indoor side, and the insulation layer (6-3) faces the outdoor side, forming an external insulation and internal phase change structure.

10. The application of an adjustable heat collection and storage composite wall as described in any one of claims 1-8 in the solar energy rich area of ​​the Qinghai-Tibet Plateau.

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