Grinding-stirring preparation system and method for low-carbon phase change cold storage material
By using low-carbon energy supply modules and waste heat exchangers in the preparation process of phase change cooling materials, the problems of uneven stirring, high energy consumption and high carbon emissions during the preparation process in the prior art are solved, the uniformity and performance stability of the material are achieved, and the preparation cost and energy consumption are reduced.
Patent Information
- Application Number
- CN202411860803.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-03-14
AI Technical Summary
The existing preparation process of phase change cooling materials has problems such as uneven stirring, high energy consumption and high carbon emissions, resulting in high material preparation costs and comprehensive energy consumption per unit product.
The preparation system and method of grinding-mixing low-carbon phase change cooling material is adopted, including preparation modules, low-carbon energy supply modules and waste heat exchangers. Power energy is provided through photovoltaic power generation, and the heating unit and the cooling unit provide heat load and cooling load respectively. The waste heat exchanger is used to recover and reuse waste heat and cooling heat to achieve a low-carbon and low-energy consumption preparation process.
The uniformity of phase-change cooling materials and the stability of finished product performance are achieved, while reducing the energy consumption and carbon emissions of the preparation process and reducing the preparation cost of the material.
Smart Images
Figure CN119607995A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of phase change material preparation and grinding-stirring, and in particular relates to a system and method for grinding-stirring preparation of a low-carbon phase change cold storage material. Background Art
[0002] Cold storage technology is a green building energy-saving technology proposed in recent years. It has not only become a very effective "peak shifting and valley filling" strategy, but also shows significant potential in the efficient use of renewable energy. As a physical energy storage technology, using valley electricity to store cold and providing cooling during peak hours can shift 40% to 50% of the air conditioning refrigeration load during peak hours, which can not only reduce users' electricity costs, but also promote peak shifting and valley filling; at the same time, it can also effectively reduce the installed capacity of refrigeration equipment, thereby reducing the operating costs of air conditioners.
[0003] However, the current preparation process of phase change cold storage materials is mainly based on the stirring process of a stirred tank, which has disadvantages such as uneven stirring, high energy consumption, and high carbon emissions, thereby increasing the preparation cost of the material and the comprehensive energy consumption per unit product. Summary of the invention
[0004] In view of the above technical problems, the present disclosure provides a preparation system and method for grinding and stirring a low-carbon phase-change cold storage material, in order to at least partially solve the above technical problems.
[0005] As a first aspect of the present disclosure, a low-carbon phase-change cold storage material grinding-stirring preparation system is provided, comprising: a preparation module for preparing phase-change cold storage material, a low-carbon energy supply module for providing cold and hot loads for the preparation module, and a waste heat exchanger.
[0006] The preparation module includes: a feeding unit for feeding phase change material, a mixer for evenly dispersing the phase change material and converting it from powder to colloid, a sand mill for evenly grinding the colloidal phase change material, and a pipeline for conveying the phase change material ground by the sand mill to the mixer for redispersion.
[0007] The low-carbon energy supply module includes: a heating unit that provides heat load for the mixer, a cooling unit that provides cold load for the sand mill, and a photovoltaic power generation unit that provides electrical energy for the heating unit and the cooling unit.
[0008] The waste heat exchanger is used to recover the first waste heat released by the mixer when dispersing the phase change material and the first cooling heat taken away by the cooling unit when cooling the sand mill and the phase change material inside it, and obtain the second waste heat and the second cooling heat through heat exchange, wherein the second waste heat is transported to the heating unit for reheating and reuse, and the second cooling heat is transported to the cooling unit for recooling and reuse.
[0009] As a second aspect of the present disclosure, a preparation method of low-carbon phase change cold storage material grinding-stirring is provided, comprising: conveying the phase change material into a mixer for uniform dispersion, and using the heat load provided by a heating unit to convert the phase change material from powder to a gel; conveying the gel-like phase change material into a sand mill for grinding, and using the cold load provided by a cooling unit to reduce the temperature of the sand mill and the phase change material inside the sand mill; conveying the ground gel-like phase change material into a mixer for redispersion, repeating the grinding and dispersing operations to obtain a finished phase change cold storage material; and using a waste heat exchanger to recover the first waste heat released by the mixer when dispersing the phase change material and the first cooling heat taken away by the cooling unit when cooling the sand mill and the phase change material inside the sand mill, to obtain a second waste heat and a second cooling heat through heat exchange, wherein the second waste heat is conveyed to the heating unit for reheating and reuse, and the second cooling heat is conveyed to the cooling unit for recooling and reuse; wherein the electric energy of the heating unit and the cooling unit is provided by a photovoltaic power generation unit.
[0010] In an embodiment of the present disclosure, the phase change material enters the mixer through the feeding unit, and the mixer converts the phase change material entering the mixer from powder to colloidal phase change material by receiving the heat load provided by the heating unit. Subsequently, the colloidal phase change material is transported to the sand mill for uniform grinding. During the grinding process, the sand mill reduces the temperature of the sand mill and the colloidal phase change material inside it by using the cold load provided by the cooling unit. Subsequently, the ground colloidal phase change material is transported to the mixer for further stirring and dispersion. By repeating the operations of stirring in the mixer and grinding in the sand mill, a finished phase change cold storage material can be obtained. In addition, the electricity, cold and heat loads required for the preparation of the phase change cold storage material disclosed in the present disclosure are all provided by a low-carbon energy supply module. Among them, the photovoltaic power generation unit provides electricity for the heating unit and the cooling unit, and the heating unit converts electricity into heat load for the mixer. Similarly, the cooling unit converts electricity into cold load for the sand mill. The conversion from traditional city electricity to green electricity reduces energy consumption, reduces carbon emissions, and reduces the preparation cost of phase change cold storage materials. Therefore, by using the grinding-stirring preparation system and method of the low-carbon phase change cold storage material provided by the present invention, the uniformity of phase change materials of different components under different particle size requirements and the stability of the performance of the phase change cold storage material finished product can be achieved, while achieving energy supply and low carbon in the production process. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the framework of the grinding and stirring preparation system of the low-carbon phase-change cold storage material in the embodiment of the present disclosure.
[0012] Description of Reference Numerals
[0013] 1-photovoltaic power generation unit, 2-heating unit, 3-cooling unit, 4-electrochemical power storage unit, 5-phase change cold storage unit, 6-waste heat exchanger, 7-feeding unit, 8-air compressor, 9-mixer, 10-peristaltic pump, 11-sand mill, 12-finished product tank. DETAILED DESCRIPTION
[0014] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.
[0015] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.
[0016] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.
[0017] When using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, and C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc. When using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, or C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.
[0018] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only reference directions of the drawings and are not intended to limit the scope of protection of the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present disclosure.
[0019] In the process of implementing the disclosed inventive concept, it was found that the current phase change cold storage material is mainly prepared by a stirring kettle stirring process. The phase change cold storage material prepared by this process has the problem of poor product performance due to uneven stirring, and the energy consumption and carbon emissions in the production process are high. In addition, most of the existing phase change cold storage material preparation processes use industrial and commercial electricity prices with peak and valley electricity prices, which are relatively costly.
[0020] Therefore, the present disclosure provides a preparation system and method for grinding and stirring a low-carbon phase-change cold storage material, which uses photovoltaic power generation instead of traditional city electricity to reduce dependence on and consumption of traditional energy sources, reduce carbon emissions, and use a waste heat exchanger to recover the waste heat generated by the preparation module, so as to achieve the purpose of improving quality and efficiency, and reduce the cost of preparing phase-change cold storage materials. In addition, the coordinated work of the mixer and the sand mill in the preparation module can meet the uniformity of phase-change materials of different compositions under different particle size requirements, and obtain a finished phase-change cold storage material with stable performance, and the prepared phase-change cold storage material can provide a cold load for preparing phase-change cold storage materials. Furthermore, through the feeding unit, the mixer, the sand mill and the photovoltaic power generation unit, the raw material ratio, mixing, grinding process and process parameters of the phase-change cold storage material can be more accurately controlled, so that a phase-change cold storage material with higher quality, higher performance, more stable and higher consistency can be prepared. By adopting the preparation system and method for grinding and stirring a low-carbon phase-change cold storage material provided by the present disclosure, the production cycle of preparing phase-change cold storage materials can be further shortened and the production cost can be reduced. In addition, the grinding-stirring preparation system and method of the low-carbon phase-change cold storage material provided by the present disclosure are suitable for producing inorganic salt phase-change materials.
[0021] Figure 1 It is a schematic diagram of the framework of the grinding and stirring preparation system of the low-carbon phase-change cold storage material in the embodiment of the present disclosure.
[0022] like Figure 1 As shown, the low-carbon phase-change cold storage material grinding-stirring preparation system provided by the present disclosure includes: a preparation module for preparing phase-change cold storage materials, and a low-carbon energy supply module for providing cold and hot loads for the preparation module. Further, the preparation module includes: a feeding unit 7, a mixer 9, and a sand mill 11; the low-carbon energy supply module includes: a photovoltaic power generation unit 1, a heating unit 2, a cooling unit 3, and a waste heat exchanger 6.
[0023] More specifically, the preparation module includes: a feeding unit 7 for feeding the phase change material, a mixer 9 for evenly dispersing the phase change material and converting it from powder to colloid, a sand mill 11 for evenly grinding the colloidal phase change material, and a pipeline for transporting the phase change material ground by the sand mill 11 to the mixer 9 for redispersion.
[0024] The low-carbon energy supply module includes: a heating unit 2 for providing heat load for the mixer 9 , a cooling unit 3 for providing cold load for the sand mill 11 , and a photovoltaic power generation unit 1 for providing electrical energy for the heating unit 2 and the cooling unit 3 .
[0025] The waste heat exchanger 6 is used to recover the first waste heat released by the mixer 9 when dispersing the phase change material and the first cooling heat taken away by the cooling unit 3 when cooling the sand mill 11 and the phase change material inside it, and obtain the second waste heat and the second cooling heat through heat exchange, wherein the second waste heat is transported to the heating unit 2 for reheating and reuse, and the second cooling heat is transported to the cooling unit 3 for recooling and reuse.
[0026] In the embodiment of the present disclosure, the conventional preparation of phase change cold storage material is mainly provided by the mains, while the cold and hot loads required for the preparation of phase change cold storage material in the present disclosure are provided by the low-carbon energy supply module. Among them, the photovoltaic power generation unit 1 is the core component of the low-carbon energy supply module, which can provide power for the heating unit 2 and the cooling unit 3. The heating unit 2 converts the electric energy into a heat load and provides it to the mixer 9. The phase change material enters the mixer 9 through the feeding unit 7. The heat load provided by the heating unit 2 accelerates the dissolution of the phase change material entering the mixer 9, so that it is converted from a powder into a colloidal phase change material. Subsequently, the colloidal phase change material is transported to the sand mill 11 for uniform grinding. The sand mill 11 releases heat during the grinding of the colloidal phase change material. At this time, the cooling unit 3 converts the electric energy into a cold load and provides it to the sand mill 11 to reduce the temperature of the sand mill 11 and the colloidal phase change material inside it, and then the colloidal phase change material is transported to the mixer 9 for stirring and dispersion again. By repeating the operations of stirring with the mixer 9 and grinding with the sand mill 11, a phase change cold storage material with uniform particle size, higher performance and more stability can be obtained. The present invention converts traditional city electricity into green electricity, reduces dependence on and consumption of traditional energy, reduces carbon emissions, and reduces the preparation cost of phase change cold storage materials. Therefore, the preparation system of grinding and stirring low-carbon phase change cold storage materials provided by the present invention can achieve good uniformity of phase change materials of different components while meeting different particle size requirements and stable performance of finished phase change cold storage materials, achieving energy supply and low carbon in the production process.
[0027] More specifically, the photovoltaic power generation unit 1 of the present disclosure can be one or more photovoltaic power generation components. When the photovoltaic power generation components are irradiated by sunlight, they output electrical energy, and the generated electrical energy is transmitted to the heating unit 2 and the cooling unit 3 through cables. The heating unit 2 provides heat load for the mixer 9, wherein the heating unit 2 can be a compression heat pump. The compression heat pump can compress the refrigerant (working medium) to a high pressure state through an electric motor or a gas engine, causing it to heat up to increase the temperature and pressure. Subsequently, the high-temperature and high-pressure refrigerant (working medium) enters the condenser, and releases heat to the external environment through heat exchange with the external environment, thereby achieving a heating effect. In this process, electrical energy is converted into mechanical energy, which in turn drives the heat pump to work and output heat load, wherein the working medium can be air or water.
[0028] The cooling unit 3 provides cooling load for the sand mill 11, wherein the cooling unit 3 may be a compression refrigeration unit. The working principle of the compression refrigeration unit is: the compressor in the compression refrigeration unit is driven by electric energy, and the compressor extracts the refrigerant in the evaporator and compresses it to vaporize the refrigerant. During the vaporization process, the refrigerant absorbs the heat of the surrounding medium, thereby reducing the temperature of the medium and achieving the cooling effect. In this process, electric energy is converted into mechanical energy, driving the compressor to work and output cooling load.
[0029] The mixer 9 is provided with a stirrer and a disperser. The stirrer may be a stirring paddle or a stirring rod; the disperser may be a dispersion disk. The phase change material (i.e., raw material) enters the mixer 9 through the feeding unit 7, and the power source of the stirring and dispersing motor in the mixer 9 drives the intermediate transmission component to realize the stirring of the stirrer and the dispersing operation of the disperser, so that the phase change material entering the mixer 9 is evenly dispersed. The mixer 9 is also provided with a jacketed heat exchanger for heat exchange with the heat load provided by the heating unit 2 to obtain a colloidal phase change material, and at the same time facilitates the waste heat exchanger 6 to recover the first waste heat released during the stirring and dispersing of the phase change material by the mixer 9. Further, the mixer 9 disclosed in the present invention may be a double planetary mixer, and other mixers that can better achieve the stirring and dispersing of the phase change material may also be used.
[0030] The sand mill 11 is provided with a grinder to further grind the colloidal phase change material evenly dispersed by the mixer 9. The sand mill 11 is also provided with a jacketed heat exchanger for exchanging heat with the cold load provided by the cooling unit 3 to reduce the temperature of the sand mill 11 grinding the colloidal phase change material process, obtain a phase change material at a lower temperature, and facilitate the waste heat exchanger 6 to recover the first cooling heat taken away by the cooling unit 3 to cool the sand mill 11 and the phase change material, wherein the temperature of the first cooling heat is higher than the temperature of the first waste heat. Through the repeated dispersion and grinding process of the mixer 9 and the sand mill 11, the prepared phase change cold storage material can meet the uniformity and performance stability under different particle size requirements.
[0031] The waste heat exchanger 6 is connected to the mixer 9 and the sand mill 11 at one end, and is connected to the heating unit 2 and the cooling unit 3 at the other end. The first cooling heat of the sand mill 11 and the first waste heat of the mixer 9 are heat exchanged through the waste heat exchanger 6 to obtain the second waste heat and the second cooling heat. The second waste heat (i.e., the recovered heat) can be used as a low-temperature heat source for the heating unit 2, and can be fed back to the mixer 9 for reuse after being improved in quality and efficiency (i.e., further heated) by the heating unit 2. Similarly, after the first cooling heat and the first waste heat are heat exchanged, the second cooling heat obtained can be cooled again by the cooling unit 3 and then fed back to the sand mill 11 for reuse, which reduces the power consumption of the cooling unit 3 and realizes the cascade utilization of the waste heat of the mixer 9 and the sand mill 11.
[0032] According to an embodiment of the present disclosure, continue as Figure 1 As shown, the preparation module of the present disclosure further includes a peristaltic pump 10. The peristaltic pump 10 is connected to the mixer 9 at one end through a pipeline, and is connected to the sand mill 11 at the other end, and is used to transport the colloidal phase change material from the mixer 9 to the sand mill 11 for grinding. The use of the peristaltic pump 10 ensures that the colloidal phase change material circulates and is stably transported in the preparation module.
[0033] According to an embodiment of the present disclosure, continue as Figure 1 As shown, the preparation module of the present disclosure further includes: a finished product tank 12, which is connected to the outlet of the sand mill 11 and is used to store the phase change cold storage material prepared by the preparation module.
[0034] According to an embodiment of the present disclosure, continue as Figure 1 As shown, the low-carbon energy supply module of the present disclosure also includes: an electrochemical power storage unit 4. The electrochemical power storage unit 4 is connected to the photovoltaic power generation unit 1, and is used to store the electric energy of the photovoltaic power generation unit 1 and provide electric energy for the heating unit 2. In the embodiment of the present disclosure, the electrochemical power storage unit 4 is used to store the electric energy output by the photovoltaic power generation unit 1 under sunlight or during the day, and the stored electric energy is used to provide electric energy for the heating unit 2 under no sunlight or at night, so as to ensure the 24-hour power demand of the preparation module in the phase change cold storage material production process.
[0035] According to an embodiment of the present disclosure, the low-carbon energy supply module of the present disclosure also includes: a phase change cold storage unit 5. The finished product tank 12 is connected to the phase change cold storage unit 5 to provide phase change cold storage material to the phase change cold storage unit 5. The cold supply unit 3 is connected to the phase change cold storage unit 5 to provide a low-temperature environment for the phase change cold storage material so that the phase change cold storage material absorbs the cold load and realizes the storage of cold. The phase change cold storage unit 5 is used to store the cold load released by the cold supply unit 3, and is connected to the sand mill 11 to provide the sand mill 11 with a cold load, thereby reducing the temperature of the sand mill 11 and the phase change material therein. In an embodiment of the present disclosure, the electrochemical power storage unit 4 and the phase change cold storage unit 5 can ensure that the 24-hour electric energy, heat load and cold load requirements of the grinding-stirring preparation process are matched, while realizing the "peak shifting and valley filling" of electricity and reducing the production energy cost.
[0036] According to an embodiment of the present disclosure, the preparation system provided by the present disclosure further includes: an air compressor 8, which provides compressed air for the feeding process of the phase change material.
[0037] According to an embodiment of the present disclosure, the preparation system provided by the present disclosure also includes: a control unit for controlling the operating status of each component inside the preparation module and the low-carbon energy supply module to obtain higher quality, more stable and more uniform phase change cold storage material.
[0038] As a second aspect of the present disclosure, a method for preparing a low-carbon phase-change cold storage material by grinding and stirring is provided, comprising: Figure 1 The preparation system of grinding and stirring low-carbon phase change cold storage material shown in the figure is executed. The preparation method includes: conveying the phase change material to the mixer 9 for uniform dispersion, and using the heat load provided by the heating unit 2 to convert the phase change material from powder to colloid; conveying the colloid phase change material to the sand mill 11 for grinding, and using the cold load provided by the cooling unit 3 to reduce the temperature of the sand mill and the phase change material inside; conveying the ground colloid phase change material to the mixer 9 for re-dispersion, repeating the grinding and dispersing operations to obtain the finished phase change cold storage material; wherein, the first waste heat released by the mixer 9 when dispersing the phase change material is recovered by the waste heat exchanger 6 and the first cooling heat taken away by the cooling unit 3 when cooling the sand mill 11 and the phase change material, and the second waste heat and the second cooling heat are obtained through heat exchange, wherein the second waste heat is conveyed to the heating unit 2 for reheating and reuse, and the second cooling heat is conveyed to the cooling unit 3 for recooling and reuse; the electric energy of the heating unit 2 and the cooling unit 3 is provided by the photovoltaic power generation unit 1.
[0039] In the embodiment of the present disclosure, the phase change material (i.e., raw material) is introduced into the mixer 9 through the feeding unit 7 to be evenly dispersed, and the heat load provided by the heating unit 2 in the low-carbon energy supply module is used to ensure the uniform reaction temperature in the mixer, while converting the powdered phase change material into a colloidal phase change material, and taking away the first waste heat released by the mixer 9 when dispersing the phase change material. Subsequently, the colloidal phase change material is transported to the sand mill 11 for even grinding, and the ground phase change material is introduced into the mixer 9 for redispersion. After several cycles, the finished phase change cold storage material is obtained, and the obtained finished phase change cold storage material is stored in the finished product tank 12 for use. A large amount of heat will be released during the grinding of the colloidal phase change material by the sand mill 11. The cold load provided by the cooling unit 3 in the low-carbon energy supply module cools the sand mill 11 and the phase change material therein to take away the first cooling heat. The low-carbon energy supply module provides electricity, cold load and heat load for the phase change cold storage material grinding-stirring preparation method. Among them, the photovoltaic power generation unit 1 provides heat load and cold load requirements for the process of producing phase change cold storage materials, wherein the electric energy of the heating unit 2 and the cooling unit 3 is provided by the photovoltaic power generation unit 1, and the heat released by the heating unit 2 is used to heat the mixer 9 to obtain the first waste heat, and the first cooling heat taken away by the cooling unit 3 for cooling the sand mill 11 is heat exchanged through the waste heat exchanger 6 to obtain the second waste heat and the second cooling heat. The second waste heat can provide a low-temperature heat source for the heating unit 2, and the second cooling heat can provide a cold source for the cooling unit 3, so as to realize the waste heat recovery and step-by-step quality improvement and efficiency enhancement.
[0040] According to an embodiment of the present disclosure, the first waste heat temperature is 35°C, the first cooling heat temperature is 45°C, the second waste heat temperature is 40°C, and the second cooling heat temperature is 30°C.
[0041] According to an embodiment of the present disclosure, the preparation method further includes: storing the electric energy of the photovoltaic power generation unit 1 through the electrochemical energy storage unit 4, and providing electric energy for the heating unit 2. In an embodiment of the present disclosure, the photovoltaic power generation unit 1 and the electrochemical power storage unit 4 work together to ensure the 24-hour electricity demand of the production process of the phase change cold storage material.
[0042] According to an embodiment of the present disclosure, the preparation method further includes: using the phase change cold storage unit 5 to store the cold load released by the cooling unit 3, and providing the cold load for the sand mill 11. In the embodiment of the present disclosure, by configuring the phase change cold storage unit 5, working in conjunction with the cooling unit 3, it is possible to ensure that the cold load demand for the sand mill is provided 24 hours a day.
[0043] According to an embodiment of the present disclosure, the temperature in the mixer 9 and the sand mill 11 is 35°C±1°C.
[0044] In summary, the electricity, cooling load and heat load provided by the low-carbon energy supply module provided in the present invention can be coupled and integrated by the photovoltaic power generation unit 1, the heating unit 2, the cooling unit 3, the electrochemical power storage unit 4, the phase change cold storage unit 5 and the waste heat exchanger 6, which is a low-carbon, efficient and clean production process system.
[0045] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the present disclosure is defined by the attached claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.
Claims
1. A grinding-stirring preparation system for low-carbon phase-change cold storage materials, characterized in that: The preparation system comprises: The preparation module comprises: a feeding unit for feeding the phase change material, a mixer for evenly dispersing the phase change material and converting it from powder to colloid, a sand mill for evenly grinding the colloid phase change material, and a pipeline for conveying the phase change material ground by the sand mill to the mixer for redispersion; A low-carbon energy supply module, comprising: a heating unit for providing heat load for the mixer, a cooling unit for providing cold load for the sand mill, and a photovoltaic power generation unit for providing electric energy for the heating unit and the cooling unit; The preparation system further comprises: A waste heat exchanger, used to recover the first waste heat released by the mixer when dispersing the phase change material and the first cooling heat taken away by the cooling unit when cooling the sand mill and the phase change material inside the sand mill, and obtain the second waste heat and the second cooling heat through heat exchange; The second waste heat is transported to the heating unit for reheating and reuse, and the second cooling heat is transported to the cooling unit for recooling and reuse.
2. The preparation system according to claim 1, characterized in that: The mixer is a double star mixer; The heating unit is a compression heat pump; The cooling unit is a compression refrigeration unit.
3. The preparation system according to claim 1, characterized in that: The preparation module also includes: a peristaltic pump, used to transport the colloidal phase change material from the mixer to the sand mill; and / or The finished product tank is connected to the outlet of the sand mill and is used to store the phase change cold storage material prepared by the preparation module.
4. The preparation system according to claim 1, characterized in that: The low-carbon energy supply module also includes: The electrochemical power storage unit is used to store the electric energy of the photovoltaic power generation unit and provide electric energy for the heating unit.
5. The preparation system according to claim 1, characterized in that: The low-carbon energy supply module also includes: a phase change cold storage unit; The finished product tank pipeline is connected to the phase change cold storage unit to provide the phase change cold storage unit with phase change cold storage material; The phase-change cold storage unit is used to store the cold load released by the cold supply unit and provide the cold load for the sand mill.
6. The preparation system according to claim 1, characterized in that: The preparation system also includes: an air compressor for providing compressed air for the feeding process of the phase change material.
7. A grinding-stirring preparation method of a low-carbon phase-change cold storage material, characterized in that: The preparation method comprises: The phase change material is transported to the mixer and evenly dispersed, and the phase change material is converted from powder to gel by using the heat load provided by the heating unit; The colloidal phase change material is conveyed to a sand mill for grinding, and the temperature of the sand mill and the phase change material therein is reduced by using the cooling load provided by a cooling unit; The ground colloidal phase change material is conveyed to a mixer for redispersion, and the grinding and dispersing operations are repeated to obtain a finished phase change cold storage material; and A waste heat exchanger is used to recover the first waste heat released by the mixer when dispersing the phase change material and the first cooling heat taken away by the cooling unit when cooling the sand mill and the phase change material therein, and a second waste heat and a second cooling heat are obtained through heat exchange, wherein the second waste heat is transported to the heating unit for reheating and reuse, and the second cooling heat is transported to the cooling unit for recooling and reuse; Wherein, the electric energy of the heating unit and the cooling unit is provided by a photovoltaic power generation unit.
8. The preparation method according to claim 7, characterized in that: The preparation method further comprises: The electric energy of the photovoltaic power generation unit is stored by an electrochemical energy storage unit, and the electric energy is provided to the heating unit.
9. The preparation method according to claim 7, characterized in that: The preparation method further comprises: A phase-change cold storage unit is used to store the cold load released by the cold supply unit and provide the cold load for the sand mill.