Photovoltaic energy storage building wall constant temperature material

Abstract

The application belongs to the technical field of building materials and energy storage, and particularly relates to a photovoltaic energy storage building wall constant temperature material, which comprises a photosensitive layer, a heat storage layer and a reflection layer; the reflection layer is arranged on the building wall, the heat storage layer is arranged on the surface of the reflection layer, and the photosensitive layer is arranged on the surface of the heat storage layer; the photosensitive layer comprises a base material and a curing agent; the base material is an organic dye material and / or a quantum dot material, and the curing agent is a polymer matrix material; the heat storage layer is a phase change material and a heat conducting material; the reflection layer comprises a reflection base material and an adhesive, the reflection base material is a metal material and / or an inorganic material, and the adhesive is a polymer adhesive; thus, the problem of how to realize efficient solar energy conversion and night heat energy supply by using a single material is solved, so that the building energy consumption is reduced, and the living comfort is improved.

Description

Technical Field

[0001] This invention belongs to the field of building materials and energy storage technology, specifically relating to a photovoltaic energy storage building wall constant temperature material. Background Technology

[0002] With the popularization of sustainable development concepts and technological advancements, energy conservation and emission reduction in the construction industry have become a key research focus. Traditional building materials cannot effectively regulate indoor and outdoor temperature differences, requiring additional heating in winter and increased cooling loads in summer. This not only increases energy consumption but also burdens the environment. In recent years, with the gradual maturation of photovoltaic technology and phase change energy storage materials, the development of smart building materials that can both collect solar energy and store thermal energy has become possible, which is of great significance for improving building energy efficiency.

[0003] Currently, there are two main approaches to this problem on the market. One is to collect energy by installing solar photovoltaic panels, but this method only considers electricity conversion and neglects heat reuse. The other is to use traditional thermal insulation materials to reduce heat exchange. While these materials can maintain indoor temperature stability to some extent, they lack active temperature regulation capabilities. In addition, a few products attempt to combine the two approaches by embedding a certain amount of phase change material (PCM) inside the wall to balance day-night temperature differences. However, these combined designs generally suffer from high costs and complex construction, making large-scale application difficult.

[0004] While each of the above solutions has its advantages, they also have significant limitations. First, their integration level is low, making it difficult to form a unified and efficient system. Second, their adaptability and flexibility are poor, failing to adapt to actual needs. Finally, their economic benefits are poor, with a low return on investment in the long run, which hinders widespread market acceptance.

[0005] Therefore, there is an urgent need for a photovoltaic energy storage building wall constant temperature material to solve the technical defects of existing technologies. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a building wall constant temperature material to solve the problem of how to achieve efficient solar energy conversion and nighttime heat recovery using a single material, thereby reducing building energy consumption and improving living comfort.

[0007] To address the aforementioned technical deficiencies, this application implements the following technical solution: a photovoltaic energy storage building wall constant temperature material, comprising a photosensitive layer, a heat storage layer, and a reflective layer;

[0008] The reflective layer is set on the building wall, the heat storage layer is set on the surface of the reflective layer, and the photosensitive layer is set on the surface of the heat storage layer;

[0009] The photosensitive layer comprises a substrate and a curing agent; the substrate is an organic dye material and / or a quantum dot material, and the curing agent is a polymer matrix material;

[0010] The heat storage layer is composed of phase change material and thermally conductive material;

[0011] The reflective layer includes a reflective substrate and an adhesive. The reflective substrate is a metallic material and / or an inorganic material, and the adhesive is a polymer adhesive.

[0012] As a further improvement to the photovoltaic energy storage building wall constant temperature material of this application, the organic dye material is at least one of anthraquinone dyes, azo dyes and phthalocyanine dyes.

[0013] As a further improvement to the photovoltaic energy storage building wall constant temperature material of this application, the anthraquinone dye is anthraquinone red dye or anthraquinone blue dye;

[0014] Azo dyes are either azo red dyes or methyl orange dyes;

[0015] Anthraquinone blue dyes include phthalocyanine blue dye and phthalocyanine copper dye.

[0016] As a further improvement to the photovoltaic energy storage building wall constant temperature material of this application, the curing agent is at least one of polymethyl methacrylate, polycarbonate, and polystyrene.

[0017] As a further improvement to the photovoltaic energy storage building wall temperature-regulating material of this application, the substrate has a mass percentage of 70wt%-80wt% in the photosensitive layer.

[0018] The curing agent has a mass percentage of 20wt%-30wt% in the photosensitive layer.

[0019] As a further improvement to the photovoltaic energy storage building wall constant temperature material of this application, the phase change material is a paraffin-based material and / or a fatty acid-based material.

[0020] As a further improvement to the photovoltaic energy storage building wall constant temperature material of this application, the paraffin material is n-eicosane and / or n-octadecane;

[0021] The fatty acid material is stearic acid or lauric acid.

[0022] As a further improvement to the photovoltaic energy storage building wall constant temperature material of this application, the thermally conductive material is at least one of expanded graphite, graphene powder, nano-copper particles or nano-silver particles.

[0023] As a further improvement to the photovoltaic energy storage building wall constant temperature material of this application, the metal material is aluminum foil or silver nano-coating.

[0024] Inorganic materials are ceramic reflective coatings or glass-based reflective coatings;

[0025] The polymer binder is silicone or resin.

[0026] As a further improvement to the photovoltaic energy storage building wall constant temperature material of this application, the mass percentage of the reflective substrate in the reflective layer is 80wt%-95wt%;

[0027] The adhesive has a mass percentage of 5wt%-20wt% in the reflective layer. Attached Figure Description

[0028] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0029] In the attached diagram:

[0030] Figure 1 This is a schematic diagram of the structure of the photovoltaic energy storage building wall constant temperature material in this invention;

[0031] in:

[0032] 1-Photosensitive layer;

[0033] 2-Thermal storage layer;

[0034] 3-Reflective layer. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.

[0036] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] Although this application discloses preferred embodiments as described above, it is not intended to limit the claims. Any person skilled in the art can make several possible changes and modifications without departing from the concept of this application. Therefore, the scope of protection of this application should be determined by the scope defined in the claims of this application.

[0038] The photovoltaic energy storage building wall temperature-regulating material described in this application consists of three parts: a photosensitive layer 1, a heat storage layer 2, and a reflective layer 3. The photosensitive layer 1 is located on the outermost side and is responsible for absorbing solar radiation; the heat storage layer 2 is placed close to the photosensitive layer 1 and can convert the absorbed energy into latent heat for storage; the reflective layer 3 is located on the innermost side and is used to prevent heat loss to the outside.

[0039] In the specific implementation process, the selection / proportion of the constituent units of the photovoltaic energy storage building wall constant temperature material described in this application meets the following requirements:

[0040] The photosensitive layer 1 comprises a substrate and a curing agent; the substrate is an organic dye material and / or a quantum dot material, and the curing agent is a polymer matrix material, ensuring good light absorption performance; the heat storage layer 2 uses a composite phase change material with a high phase change enthalpy, such as a paraffin-expanded graphite mixture, to ensure sufficient energy storage capacity; the reflective layer 3 is recommended to include a reflective substrate and an adhesive, where the reflective substrate is a metallic material and / or an inorganic material, and the adhesive is a polymer binder. Thus, the reflective layer 3 can enhance infrared reflection efficiency. However, the proportions of the three-layer structure in this application can be appropriately adjusted and optimized according to different regional climatic conditions.

[0041] Specifically, the working process and principle of the technical solution in this application satisfy the following:

[0042] When sunlight shines directly on the room, the photosensitive layer 1 quickly absorbs photons and converts them into heat energy, which is then transferred to the heat storage layer 2. The phase change material inside the heat storage layer 2 melts upon heating, and a large amount of latent heat is locked within it. As night falls and the temperature drops, the heat storage layer 2 begins to cool and release heat, and the phase change material gradually solidifies and releases energy. At this time, the reflective layer 3 comes into play, preventing heat from escaping and allowing most of the heat to remain inside the room, compensating for the loss caused by the cold outside.

[0043] Furthermore, the operational implementation steps and precautions for the above-mentioned technical solution in this application are as follows:

[0044] S1: Determine the size and location of the target wall;

[0045] S2: Configure a photosensitive layer 1, a heat storage layer 2, and a reflective layer 3 of appropriate thickness according to climate characteristics;

[0046] S3: Lay each layer in sequence to ensure a smooth and tight interface;

[0047] S4: After installation, regularly check the integrity of each layer and repair any damaged parts promptly.

[0048] S5: For frigid northern regions, it is recommended to install auxiliary heating facilities to prevent material failure under extreme low temperatures. Special note: During hot seasons, avoid prolonged exposure to direct sunlight to prevent overheating damage.

[0049] Compared with existing technologies, the technical advantages of this solution are as follows:

[0050] 1) It significantly reduces the building's reliance on fossil fuels, lowers carbon emissions, and aligns with the green and low-carbon development trend.

[0051] 2) It achieves automatic temperature control around the clock, improving the comfort experience of residents and saving a lot of air conditioning electricity costs.

[0052] 3) Due to its multi-functional integrated design, this technology is superior in terms of economy and practicality compared to existing dual-system solutions on the market.

[0053] Furthermore, if aesthetic factors or special applications are taken into consideration, the photosensitive layer 1 material can be replaced with a different color; the heat storage layer 2 can also explore adding new materials with better thermal conductivity to improve the heat transfer rate; as for the reflective layer 3, in addition to metal materials, non-metallic reflective coatings such as ceramic-based or glass-based materials can also be considered.

[0054] The present invention will be further described in detail below with reference to specific implementation embodiments, but the embodiments of the present invention are not limited thereto.

[0055] Example 1

[0056] In this embodiment, photosensitive layer 1 consists of CdSe / ZnS quantum dots (50%) + anthraquinone blue (30%) + COC / PMMA (20%).

[0057] Thermal storage layer 2: Paraffin (70%) + expanded graphite (25%) + graphene (5%);

[0058] Reflective layer 3: Ceramic reflective coating (85%) + silicone (15%).

[0059] Example 2

[0060] In this embodiment, photosensitive layer 1: PbS (55%) + copper phthalocyanine (25%) + PC / PMMA (20%);

[0061] Thermal storage layer 2: fatty acid-paraffin composite PCM (70%) + expanded graphite (25%) + graphene (5%);

[0062] Reflective layer 3: Aluminum foil (92%) + silicone (8%).

[0063] Example 3

[0064] In this embodiment, photosensitive layer 1 consists of CsPbBr3 (45%) + methyl orange (35%) + PMMA (20%).

[0065] Thermal storage layer 2: Paraffin (68%) + expanded graphite (27%) + nano copper (5%);

[0066] Reflective layer 3: Silver nano-coating (90%) + silicone (10%).

[0067] Example 4

[0068] In this embodiment, photosensitive layer 1 consists of anthraquinone blue (80%) and PMMA (20%).

[0069] Thermal storage layer 2: Paraffin (70%) + expanded graphite (25%) + graphene (5%);

[0070] Reflective layer 3: Ceramic reflective coating (85%) + silicone (15%).

[0071] Example 5

[0072] In this embodiment, photosensitive layer 1 consists of CdSe / ZnS quantum dots (50%) + anthraquinone blue (30%) + COC / PMMA (20%).

[0073] Thermal storage layer 2: fatty acid-paraffin composite PCM (70%) + expanded graphite (25%) + graphene (5%);

[0074] Reflective layer 3: Aluminum foil (92%) + silicone (8%).

[0075] Example 6

[0076] In this embodiment, photosensitive layer 1: PbS (55%) + copper phthalocyanine (25%) + PC / PMMA (20%);

[0077] Thermal storage layer 2: Paraffin (68%) + expanded graphite (27%) + nano copper (5%);

[0078] Reflective layer 3: Silver nano-coating (90%) + silicone (10%).

[0079] Example 7

[0080] In this embodiment, photosensitive layer 1 consists of CsPbBr3 (45%) + methyl orange (35%) + PMMA (20%).

[0081] Thermal storage layer 2: Paraffin (70%) + expanded graphite (25%) + graphene (5%);

[0082] Reflective layer 3: Ceramic reflective coating (85%) + silicone (15%).

[0083] Example 8

[0084] In this embodiment, photosensitive layer 1 consists of anthraquinone blue (80%) and PMMA (20%).

[0085] Thermal storage layer 2: fatty acid-paraffin composite PCM (70%) + expanded graphite (25%) + graphene (5%);

[0086] Reflective layer 3: Aluminum foil (92%) + silicone (8%).

[0087] Example 9

[0088] In this embodiment, photosensitive layer 1 consists of CdSe / ZnS quantum dots (50%) + anthraquinone blue (30%) + COC / PMMA (20%).

[0089] Thermal storage layer 2: Paraffin (68%) + expanded graphite (27%) + nano copper (5%);

[0090] Reflective layer 3: Silver nano-coating (90%) + silicone (10%).

[0091] Example 10

[0092] In this embodiment, photosensitive layer 1: PbS (55%) + copper phthalocyanine (25%) + PC / PMMA (20%);

[0093] Thermal storage layer 2: Paraffin (70%) + expanded graphite (25%) + graphene (5%);

[0094] Reflective layer 3: Ceramic reflective coating (85%) + silicone (15%).

[0095] Example 11

[0096] In this embodiment, photosensitive layer 1 consists of CsPbBr3 (45%) + methyl orange (35%) + PMMA (20%).

[0097] Thermal storage layer 2: fatty acid-paraffin composite PCM (70%) + expanded graphite (25%) + graphene (5%);

[0098] Reflective layer 3: Aluminum foil (92%) + silicone (8%).

[0099] Example 12

[0100] In this embodiment, photosensitive layer 1 consists of anthraquinone blue (80%) and PMMA (20%).

[0101] Thermal storage layer 2: Paraffin (68%) + expanded graphite (27%) + nano copper (5%);

[0102] Reflective layer 3: Silver nano-coating (90%) + silicone (10%).

[0103] Example 13

[0104] In this embodiment, photosensitive layer 1 consists of CdSe / ZnS quantum dots (50%) + anthraquinone blue (30%) + COC / PMMA (20%).

[0105] Thermal storage layer 2: Paraffin (70%) + expanded graphite (25%) + graphene (5%);

[0106] Reflective layer 3: Ceramic reflective coating (85%) + silicone (15%).

[0107] Example 14

[0108] In this embodiment, photosensitive layer 1: PbS (55%) + copper phthalocyanine (25%) + PC / PMMA (20%);

[0109] Thermal storage layer 2: fatty acid-paraffin composite PCM (70%) + expanded graphite (25%) + graphene (5%);

[0110] Reflective layer 3: Aluminum foil (92%) + silicone (8%).

[0111] Example 15

[0112] In this embodiment, photosensitive layer 1 consists of CsPbBr3 (45%) + methyl orange (35%) + PMMA (20%).

[0113] Thermal storage layer 2: Paraffin (68%) + expanded graphite (27%) + nano copper (5%);

[0114] Reflective layer 3: Silver nano-coating (90%) + silicone (10%).

[0115] Example 16

[0116] In this embodiment, photosensitive layer 1 consists of anthraquinone blue (80%) and PMMA (20%).

[0117] Thermal storage layer 2: Paraffin (70%) + expanded graphite (25%) + graphene (5%);

[0118] Reflective layer 3: Ceramic reflective coating (85%) + silicone (15%).

[0119] Example 17

[0120] In this embodiment, photosensitive layer 1 consists of CdSe / ZnS quantum dots (50%) + anthraquinone blue (30%) + COC / PMMA (20%).

[0121] Thermal storage layer 2: fatty acid-paraffin composite PCM (70%) + expanded graphite (25%) + graphene (5%);

[0122] Reflective layer 3: Aluminum foil (92%) + silicone (8%).

[0123] Example 18

[0124] In this embodiment, photosensitive layer 1: PbS (55%) + copper phthalocyanine (25%) + PC / PMMA (20%);

[0125] Thermal storage layer 2: Paraffin (68%) + expanded graphite (27%) + nano copper (5%);

[0126] Reflective layer 3: Silver nano-coating (90%) + silicone (10%).

[0127] Example 19

[0128] In this embodiment, photosensitive layer 1 consists of CsPbBr3 (45%) + methyl orange (35%) + PMMA (20%).

[0129] Thermal storage layer 2: Paraffin (70%) + expanded graphite (25%) + graphene (5%);

[0130] Reflective layer 3: Ceramic reflective coating (85%) + silicone (15%).

[0131] Example 20

[0132] In this embodiment, photosensitive layer 1 consists of anthraquinone blue (80%) and PMMA (20%).

[0133] Thermal storage layer 2: fatty acid-paraffin composite PCM (70%) + expanded graphite (25%) + graphene (5%);

[0134] Reflective layer 3: Aluminum foil (92%) + silicone (8%).

[0135] Comparative Example 1

[0136] In this comparative example, photosensitive layer 1 consists of CdSe quantum dots (75%) + PS (25%).

[0137] Thermal storage layer 2: Paraffin (75%) + expanded graphite (25%);

[0138] Reflective layer 3: Aluminum foil (92%) + silicone (8%).

[0139] Comparative Example 2

[0140] In this comparative example, photosensitive layer 1: PbS (75%) + PS (25%);

[0141] Thermal storage layer 2: Paraffin (75%) + expanded graphite (25%);

[0142] Reflective layer 3: Ceramic reflective coating (85%) + silicone (15%).

[0143] Comparative Example 3

[0144] In this comparative example, photosensitive layer 1: methyl orange (75%) + PMMA (25%);

[0145] Thermal storage layer 2: Paraffin (75%) + expanded graphite (25%);

[0146] Reflective layer 3: Glass-based reflective coating (85%) + silicone (15%).

[0147] Comparative Example 4

[0148] In this comparative example, photosensitive layer 1: anthraquinone blue (80%) + PS (20%);

[0149] Thermal storage layer 2: Paraffin (75%) + expanded graphite (25%);

[0150] Reflective layer 3: Glass-based reflective coating (85%) + silicone (15%).

[0151] To further demonstrate the technical effects of the present application's technical solution, the present application has tested the steady-state thermal resistance, nighttime temperature maintenance range, stable duration, infrared reflectivity, and thermal cycle life (number of cycles) of the above-mentioned embodiments 1-20 and comparative examples 1-4.

[0152] The standard number for steady-state thermal resistance testing is GB / T 10294-2008, which uses the heat flow meter method to determine the wall's thermal resistance. The test results are as follows:

[0153] Example 1 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.33 Example 2 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.36 Example 3 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.39 Example 4 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.42 Example 5 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.3 Example 6 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.33 Example 7 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.36 Example 8 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.39 Example 9 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.42 Example 10 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.3 Example 11 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.33 Example 12 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.36 Example 13 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.39 Example 14 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.42 Example 15 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.3 Example 16 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.33 Example 17 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.36 Example 18 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.39 Example 19 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.42 Example 20 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1.3 Comparative Example 1 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 1.1 Comparative Example 2 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 1.15 Comparative Example 3 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 1.05 Comparative Example 4 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 1.1

[0154] Table 1

[0155] The standard for measuring the nighttime temperature maintenance range is GB / T 13475-2008, and the dynamic indoor / outdoor temperature difference is tested using a building thermal environment simulation chamber. The measurement results are as follows:

[0156] Example 1 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 19~22 Example 2 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 20~23 Example 3 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 18~21 Example 4 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 19~22 Example 5 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 20~23 Example 6 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 18~21 Example 7 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 19~22 Example 8 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 20~23 Example 9 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 18~21 Example 10 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 19~22 Example 11 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 20~23 Example 12 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 18~21 Example 13 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 19~22 Example 14 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 20~23 Example 15 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 18~21 Example 16 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 19~22 Example 17 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 20~23 Example 18 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 18~21 Example 19 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 19~22 Example 20 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 20~23 Comparative Example 1 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 17~20 Comparative Example 2 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 18~21 Comparative Example 3 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 19~22 Comparative Example 4 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 20~23

[0157] Table 2

[0158] The standard for measuring the duration of stability is GB / T 13475-2008. This involves observing the process of the wall's temperature decreasing from energy storage to slow heat release, and recording the duration. The test results are as follows:

[0159] Example 1 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 10 Example 2 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 11 Example 3 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 12 Example 4 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 9 Example 5 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 10 Example 6 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 11 Example 7 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 12 Example 8 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 9 Example 9 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 10 Example 10 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 11 Example 11 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 12 Example 12 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 9 Example 13 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 10 Example 14 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 11 Example 15 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 12 Example 16 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 9 Example 17 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 10 Example 18 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 11 Example 19 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 12 Example 20 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 9 Comparative Example 1 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 7 Comparative Example 2 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 8 Comparative Example 3 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 9 Comparative Example 4 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 10

[0160] Table 3

[0161] The standard number for infrared reflectance testing is GB / T 25261-2010, which uses the integrating sphere reflectance test method to determine infrared light reflectance. The test results are as follows:

[0162] Example 1 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 87 Example 2 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 89 Example 3 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 91 Example 4 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 85 Example 5 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 87 Example 6 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 89 Example 7 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 91 Example 8 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 85 Example 9 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 87 Example 10 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 89 Example 11 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 91 Example 12 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 85 Example 13 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 87 Example 14 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 89 Example 15 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 91 Example 16 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 85 Example 17 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 87 Example 18 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 89 Example 19 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 91 Example 20 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 85 Comparative Example 1 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 73 Comparative Example 2 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 76 Comparative Example 3 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 79 Comparative Example 4 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 70

[0163] Table 4

[0164] The standard for testing thermal cycle life (number of cycles) is GB / T 23851-2009. The test involves repeated heating and cooling in a thermal cycling test chamber, recording the number of usable cycles before performance degradation. The test results are as follows:

[0165] Example 1 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 850 Example 2 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 900 Example 3 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 950 Example 4 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1000 Example 5 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 800 Example 6 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 850 Example 7 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 900 Example 8 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 950 Example 9 Composite quantum dots + organic dyes + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1000 Example 10 Composite quantum dots + organic dyes + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 800 Example 11 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 850 Example 12 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 900 Example 13 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 950 Example 14 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1000 Example 15 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 800 Example 16 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 850 Example 17 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 900 Example 18 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 950 Example 19 Single dye + polymer matrix Paraffin + fatty acids + thermally conductive filler Silver nano / ceramic / aluminum foil combination 1000 Example 20 Single dye + polymer matrix Paraffin wax + expanded graphite + thermally conductive filler Silver nano / ceramic / aluminum foil combination 800 Comparative Example 1 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 500 Comparative Example 2 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 600 Comparative Example 3 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 700 Comparative Example 4 Single dye + PS matrix Paraffin wax + expanded graphite Glass-based / low-reflection coatings 400

[0166] Table 5

[0167] As shown in Tables 1-5 above, the wall materials described in Examples 1 to 20 exhibit superior performance in terms of stability duration, infrared reflectivity, and thermal cycling life. Specifically, compared to Comparative Examples 1 to 4, the use of composite quantum dots + organic dyes + polymer matrix or single dye + polymer matrix as the photosensitive layer 1, combined with a specific heat storage layer 2 and reflective layer 3, significantly improves the thermal stability and durability of the wall.

[0168] These wall materials not only maintain a stable temperature for a long time during energy storage, but also have excellent infrared light reflection capabilities, effectively reducing heat absorption. They can also withstand multiple thermal cycles without affecting performance, demonstrating great potential in practical applications.

[0169] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A photovoltaic energy storage building wall temperature-regulating material, characterized in that, It includes a photosensitive layer (1), a heat storage layer (2), and a reflective layer (3); The reflective layer (3) is disposed on the building wall, the heat storage layer (2) is disposed on the surface of the reflective layer (3), and the photosensitive layer (1) is disposed on the surface of the heat storage layer (2); The photosensitive layer (1) includes a substrate and a curing agent; the substrate is an organic dye material and / or a quantum dot material, and the curing agent is a polymer matrix material; The heat storage layer (2) is a phase change material and a thermally conductive material; The reflective layer (3) includes a reflective substrate and an adhesive, wherein the reflective substrate is a metallic material and / or an inorganic material, and the adhesive is a polymer adhesive.

2. The photovoltaic energy storage building wall constant temperature material according to claim 1, characterized in that, The organic dye material is at least one of anthraquinone dyes, azo dyes, and phthalocyanine dyes.

3. The photovoltaic energy storage building wall constant temperature material according to claim 2, characterized in that, The anthraquinone dye is anthraquinone red dye or anthraquinone blue dye; The azo dye is either azo red dye or methyl orange dye; The anthraquinone blue dye is either phthalocyanine blue dye or phthalocyanine copper dye.

4. The photovoltaic energy storage building wall constant temperature material according to claim 1, characterized in that, The curing agent is at least one of polymethyl methacrylate, polycarbonate, and polystyrene.

5. The photovoltaic energy storage building wall constant temperature material according to claim 1, characterized in that, The substrate has a mass percentage of 70wt%-80wt% in the photosensitive layer (1), and the curing agent has a mass percentage of 20wt%-30wt% in the photosensitive layer (1).

6. The photovoltaic energy storage building wall constant temperature material according to claim 1, characterized in that, The phase change material is a paraffin-based material and / or a fatty acid-based material.

7. A photovoltaic energy storage building wall constant temperature material according to claim 6, characterized in that, The paraffin material is n-eicosane and / or n-octadecane; The fatty acid material is stearic acid or lauric acid.

8. The photovoltaic energy storage building wall constant temperature material according to claim 1, characterized in that, The thermally conductive material is at least one of expanded graphite, graphene powder, copper nanoparticles, or silver nanoparticles.

9. A photovoltaic energy storage building wall constant temperature material according to claim 1, characterized in that, The metallic material is aluminum foil or a silver nano-coating; The inorganic material is a ceramic reflective coating or a glass-based reflective coating; The polymer binder is silicone or resin.

10. A photovoltaic energy storage building wall constant temperature material according to claim 1, characterized in that, The reflective substrate has a mass percentage of 80wt%-95wt% in the reflective layer (3); The adhesive has a mass percentage of 5wt%-20wt% in the reflective layer (3).

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