CN112092141A - Sandwich phase-change energy-storage gypsum board and preparation method thereof - Google Patents
Sandwich phase-change energy-storage gypsum board and preparation method thereof Download PDFInfo
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- CN112092141A CN112092141A CN202010803157.3A CN202010803157A CN112092141A CN 112092141 A CN112092141 A CN 112092141A CN 202010803157 A CN202010803157 A CN 202010803157A CN 112092141 A CN112092141 A CN 112092141A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/003—Apparatus or processes for treating or working the shaped or preshaped articles the shaping of preshaped articles, e.g. by bending
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B19/00—Machines or methods for applying the material to surfaces to form a permanent layer thereon
- B28B19/0092—Machines or methods for applying the material to surfaces to form a permanent layer thereon to webs, sheets or the like, e.g. of paper, cardboard
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/02—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat
- F28D20/021—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using latent heat the latent heat storage material and the heat-exchanging means being enclosed in one container
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
A sandwich phase-change energy-storage gypsum board and a preparation method thereof. The core of the sandwich phase-change energy-storage gypsum board contains a plurality of phase-change material products, and each phase-change material product comprises a shell and a phase-change material packaged in the shell. The method comprises the following steps: melting the phase-change material, pouring the melted phase-change material into a shell, sealing the shell, and cooling the phase-change material to obtain a phase-change material product; connecting a plurality of phase change material products together through a connecting belt to form a phase change material product group; and paving a layer of gypsum slurry on the upper protective paper, flatly paving one or more phase-change material product groups on the gypsum slurry, paving a layer of gypsum slurry on the one or more phase-change material product groups, paving the lower protective paper, covering edges of the gypsum slurry, molding and drying to obtain the sandwich phase-change energy-storage gypsum board. The sandwich phase-change energy-storage gypsum board has the advantages of simple production process, obvious energy-storage effect and low cost.
Description
Technical Field
The application relates to the field of building materials, in particular to a sandwich phase-change energy-storage gypsum board and a preparation method thereof.
Background
With the development of social economy, the contradiction of energy supply is increasingly prominent. Research shows that the building energy consumption accounts for 20-40% of primary energy consumption, and the development of green energy storage building materials and the reduction of the building energy consumption are effective ways for solving the problem of the global energy supply contradiction in the future. The phase change energy storage material is a high-efficiency energy storage substance, can improve the functions of building materials, reduce building energy consumption and adjust the indoor environment comfort level of a building, and can store available heat energy in a phase change latent heat mode, so that the storage and conversion of available energy are realized, and the phase change energy storage material has a good development prospect in building energy conservation.
The phase-change energy storage material is required to be packaged in a building material product when applied to the field of composite materials, particularly building materials, so that the phase-change energy storage material is prevented from leaking in the use process of the phase-change building material product, and the application of the phase-change energy storage material in the field of building materials is realized. The existing preparation methods of the phase-change energy-storage gypsum board can be divided into three types: dipping method, direct mixing method, and packaging method. Although the impregnation method and the direct mixing method have simple preparation processes, the phase-change material is easy to bleed out, so the method is rarely applied to actual production. The packaging method comprises microscopic packaging, and the microscopic packaging has the defects of complex process and high market cost at present, and limits the popularization and application of the phase-change energy-storage gypsum board.
Therefore, a simple and low-cost packaging process for packaging the phase change energy storage material in the building material product is urgently needed.
Disclosure of Invention
The application provides a phase-change energy-storage gypsum board which is simple in production process, obvious in energy-storage effect and low in cost and a preparation method thereof.
Specifically, the application provides a sandwich phase change energy storage gypsum board, contain a plurality of phase change material goods in the core of sandwich phase change energy storage gypsum board, phase change material goods include the shell and encapsulate the inside phase change material of shell.
In the embodiment of the present application, the material of the housing may be plastic or stainless steel.
Optionally, the plastic may be polyethylene, polyvinyl chloride, polypropylene, polystyrene, polyamide, or thermoplastic polyester.
In the embodiment of the present application, the phase change material product may be in the shape of a plate, a strip, a sheet, or a block, and the cross-sectional shape of the product may be rectangular, triangular, or circular, and may be designed as required.
In the embodiment of the application, the housing may be a cuboid, and the length of the housing may be 30-50cm, the width may be 2.5-5cm, and the height may be 0.35-1.25 cm; alternatively, the housing is a cylinder, which may be 30-50cm in length and 1.6-2cm in diameter.
In embodiments of the present application, the thickness of the housing may be 20-100 μm.
In embodiments herein, the phase change material may be selected from any one or more of organic phase change heat storage materials, optionally, from any one or more of paraffin, lauric acid, palmitic acid, hexadecane and octadecane.
In the embodiment of the application, the core of the sandwich phase-change energy-storage gypsum board can contain heat-conducting materials.
Optionally, the thermally conductive material may be selected from any one or more of graphite fiber powder, aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride, boron nitride, and silicon carbide.
In embodiments of the present application, the total volume of the plurality of phase change material articles may comprise 10-30% of the core volume of the sandwiched phase change energy storage gypsum board.
In embodiments of the present application, the plurality of phase change material articles may be distributed in an array in the core of the sandwiched phase change energy storage gypsum board. Optionally, the plurality of phase change material articles may be spaced 2-5cm apart in the transverse direction (along the short side of the gypsum board) and 5cm apart in the longitudinal direction (along the long side of the gypsum board).
In the embodiment of the application, in the process of preparing the sandwich phase-change energy-storage gypsum board, a plurality of phase-change material products can be connected together through a connecting belt to form a phase-change material product group, then one or more phase-change material product groups are tiled on gypsum slurry, and the gypsum slurry is poured on the one or more phase-change material product groups.
In the embodiment of the application, the connection band can adopt a material which can be cut off in the process of cutting the gypsum board, and preferably, the connection band is a plastic connection band or a water-soluble PVA fiber strip.
In embodiments of the present application, the number of phase change material articles contained in different sets of phase change material articles may be the same or different.
In the embodiment of the application, one or more layers of phase change material products, preferably one layer of phase change material products, can be contained in the thickness direction of the sandwich phase change energy storage gypsum board, and all the phase change material products in the sandwich phase change energy storage gypsum board are arranged at the same thickness.
The application also provides a preparation method of the sandwich phase-change energy-storage gypsum board, which comprises the following steps:
preparation of phase change material article group: melting the phase-change material, pouring the melted phase-change material into a shell, sealing the shell, and cooling the phase-change material to obtain a phase-change material product; connecting a plurality of phase change material products together through a connecting belt to form a phase change material product group;
preparing a phase-change energy-storage gypsum board: and paving a layer of gypsum slurry on the upper protective paper, flatly paving one or more phase-change material product groups on the gypsum slurry, paving a layer of gypsum slurry on the one or more phase-change material product groups, paving the lower protective paper, covering edges of the gypsum slurry, molding and drying to obtain the sandwich phase-change energy-storage gypsum board.
In the embodiment of the present application, the material of the housing may be plastic or stainless steel.
Optionally, the plastic is polyethylene, polyvinyl chloride, polypropylene, polystyrene, polyamide, or thermoplastic polyester.
In the embodiment of the application, the housing may be a cuboid, and the length of the housing may be 30-50cm, the width may be 2.5-5cm, and the height may be 0.35-1.25 cm; alternatively, the housing is a cylinder, which may be 30-50cm in length and 1.6-2cm in diameter.
In embodiments of the present application, the thickness of the housing may be 20-100 μm;
in embodiments of the present application, the phase change material may be selected from any one or more of organic phase change heat storage materials, and optionally, may be selected from any one or more of paraffin, lauric acid, palmitic acid, hexadecane, and octadecane.
In the embodiment of the application, the total volume of the phase-change material product contained in the sandwich phase-change energy-storage gypsum board can account for 10-30% of the core volume of the sandwich phase-change energy-storage gypsum board.
In an embodiment of the present application, the connection band may be a plastic connection band or a water-soluble PVA fiber strip.
In the embodiment of the application, the core of the sandwich phase-change energy-storage gypsum board can contain heat-conducting materials.
Optionally, the thermally conductive material may be selected from any one or more of graphite fiber powder, aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride, silicon carbide, and boron nitride.
The application also provides the sandwich phase-change energy-storage gypsum board prepared by the preparation method of the sandwich phase-change energy-storage gypsum board.
The shell is adopted in advance to encapsulate the phase change material, and a plurality of phase change material products are arranged in gypsum slurry through the connected reticular phase change material products at the positions behind the mixer of the gypsum plaster board production line and in front of the forming machine, so that the normal production of the gypsum plaster board is not influenced. By using a set of reticulated phase change material articles, a uniform, discontinuous distribution of phase change material articles in the gypsum board can be achieved. Meanwhile, the plastic connecting belt or the water-soluble PVA fiber strip in the reticular phase-change material group is convenient for cutting the phase-change energy-storage gypsum board in the actual use process.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. Other advantages of the present application may be realized and attained by the instrumentalities and combinations particularly pointed out in the specification and the drawings.
Drawings
The accompanying drawings are included to provide an understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the examples serve to explain the principles of the disclosure and not to limit the disclosure.
FIG. 1 is a schematic structural diagram of a group of articles of reticulated phase change material according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a phase-change energy-storage gypsum board according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The embodiment of the application provides a sandwich phase-change energy-storage gypsum board, as shown in fig. 1-2, a plurality of phase-change material products 1 are contained in a core 2 of the sandwich phase-change energy-storage gypsum board, and each phase-change material product 1 comprises a shell and a phase-change material packaged in the shell.
In the embodiment of the present application, the material of the housing may be plastic or stainless steel; optionally, the plastic may be polyethylene, polyvinyl chloride, polypropylene, polystyrene, polyamide, or thermoplastic polyester.
In the embodiment of the application, the housing may be a cuboid, and the length of the housing may be 30-50cm, the width may be 2.5-5cm, and the height may be 0.35-1.25 cm; alternatively, the housing may be a cylinder, which may be 30-50cm in length and 1.6-2cm in diameter; here, the length, width, height of the rectangular parallelepiped housing correspond to the length, width, thickness of the gypsum board, respectively; the length of the cylindrical shell corresponds to the length of the gypsum board;
optionally, the thickness of the shell may be 20-100 μm.
In embodiments herein, the phase change material may be selected from any one or more of organic phase change heat storage materials, optionally, from any one or more of paraffin, lauric acid, palmitic acid, hexadecane and octadecane.
In the embodiment of the present application, the core 2 of the sandwich phase change energy storage gypsum board may contain a heat conducting material, and optionally, the heat conducting material may be selected from any one or more of graphite fiber powder, aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride, boron nitride and silicon carbide.
In an embodiment of the present application, the total volume of the plurality of phase change material articles 1 may be 10-30% of the volume of the sandwiched phase change energy storage gypsum board core 2.
In the embodiment of the present application, the plurality of phase change material products 1 may be distributed in an array in the core 2 of the sandwich phase change energy storage gypsum board, for example, the plurality of phase change material products are spaced at intervals of 2-5cm in the transverse direction (along the short side direction of the gypsum board) and at intervals of 5cm in the longitudinal direction (along the long side direction of the gypsum board).
In the embodiment of the application, in the process of preparing the sandwich phase-change energy-storage gypsum board, a plurality of phase-change material products 1 are connected together through a connecting belt 3 to form a phase-change material product group, then one or more phase-change material product groups are tiled on gypsum slurry, and the gypsum slurry is poured on the one or more phase-change material product groups.
In the embodiment of the present application, the connection belt 3 may be a plastic connection belt or a water-soluble PVA fiber strip.
In the embodiment of the application, the raw material plaster of the sandwich phase change energy storage gypsum board can be desulfurized gypsum, phosphogypsum, natural gypsum and a mixture thereof.
The embodiment of the application also provides a preparation method of the sandwich phase-change energy-storage gypsum board, which comprises the following steps:
preparation of phase change material article group: melting the phase-change material, pouring the phase-change material into a shell, sealing the shell, and cooling the phase-change material to obtain a phase-change material product 1; connecting a plurality of phase change material products 1 together through a connecting belt 3 to form a phase change material product group;
preparing a phase-change energy-storage gypsum board: and paving a layer of gypsum slurry on the upper protective paper, flatly paving one or more phase-change material product groups on the gypsum slurry, paving a layer of gypsum slurry on the one or more phase-change material product groups, paving the lower protective paper, covering edges of the gypsum slurry, molding and drying to obtain the sandwich phase-change energy-storage gypsum board.
In the embodiment of the present application, the material of the housing may be plastic or stainless steel; optionally, the plastic may be polyethylene, polyvinyl chloride, polypropylene, polystyrene, polyamide, or thermoplastic polyester; optionally, the housing may be a cuboid, which may have a length of 30-50cm, a width of 2.5-5cm, and a height of 0.35-1.25 cm; alternatively, the housing may be a cylinder, which may be 30-50cm in length and 1.6-2cm in diameter; also optionally, the thickness of the shell may be 20-100 μm;
in embodiments of the present application, the phase change material may be selected from any one or more of organic phase change heat storage materials, and further optionally, may be selected from any one or more of paraffin, lauric acid, palmitic acid, hexadecane, and octadecane.
In the embodiment of the application, the total volume of the phase change material product 1 contained in the sandwich phase change energy storage gypsum board can account for 10-30% of the volume of the core 1 of the sandwich phase change energy storage gypsum board.
In the embodiment of the present application, the connection belt 3 may be a plastic connection belt or a water-soluble PVA fiber strip.
In the embodiment of the present application, the core 1 of the sandwich phase change energy storage gypsum board may contain a heat conducting material, and optionally, the heat conducting material may be selected from any one or more of graphite fiber powder, aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride, silicon carbide and boron nitride.
The embodiment of the application also provides the sandwich phase-change energy-storage gypsum board prepared by the method.
Example 1
The embodiment provides a preparation method of a sandwich phase-change energy-storage gypsum board, which comprises the following steps:
the method comprises the following steps: and (4) preparing a phase change material product. Firstly, preparing a plurality of rectangular parallelepipeds with the sizes of cavities: a mold having a length of 50cm, a width of 5cm and a height of 0.6cm, and an open plastic bag having the same shape and a thickness of 60 μm was previously placed in the rectangular parallelepiped mold. And then melting paraffin with the phase transition temperature of 20 ℃, pouring the paraffin into an open plastic bag of the cuboid mold, sealing, and cooling the phase transition material to obtain a plurality of paraffin-sealed phase transition material products with the length of 50cm, the width of 5cm, the height of 0.6cm, the cuboid shape and the plastic shell. After the phase change material product is manufactured, a plurality of same phase change material products are connected with each other at intervals of 5cm in the transverse direction (along the short side direction of the gypsum board) and at intervals of 5cm in the longitudinal direction (along the long side direction of the gypsum board) by using plastic strips, and a well-connected reticular phase change material product group is manufactured.
Step two: and (4) preparing the phase-change energy-storage gypsum board. According to the weight ratio of the formula, 100 parts of calcined gypsum powder, 0.3 part of water reducing agent, 0.01 part of foaming agent, 0.4 part of modified starch, 0.5 part of glass fiber, 1 part of graphite fiber powder, 70 parts of water and a plurality of face-protecting paper are added. The water, the water reducing agent and the modified starch are stirred and dispersed uniformly to form slurry, meanwhile, a foaming agent in a foaming machine is foamed, and then the calcined gypsum, the glass fiber and the graphite fiber powder are added into a stirrer simultaneously to form the slurry, so that gypsum slurry is obtained. And (2) paving a layer of gypsum slurry on the upper protective paper, then flatly paving the phase-change material product group prepared in the step one on the gypsum slurry (enabling the length, the width and the height of the phase-change material product to be respectively positioned in the length, the width and the thickness direction of the gypsum board to be formed), pouring a layer of gypsum slurry on the phase-change material product group, finally paving a lower protective paper on the second layer of gypsum slurry, covering edges of the gypsum slurry, waiting for the forming, cutting and drying of the gypsum board with the paper surface, and finishing the preparation to obtain the phase-change energy storage gypsum board with the phase-change material product, wherein the size of the phase-change energy storage gypsum board is 300cm in length, 120cm in width and.
The plastic bag and the plastic strip are made of polyethylene.
The total volume of the phase change material product contained in the phase change gypsum board is about 30% of the core volume of the phase change gypsum board.
Comparative example 1
The ordinary gypsum board of this comparative example differs from the sandwiched phase change energy storage gypsum board of example 1 only in that: the gypsum board does not contain phase change material products.
Preparation of ordinary gypsum board: according to the weight ratio of the formula, 100 parts of calcined gypsum powder, 0.3 part of water reducing agent, 0.01 part of foaming agent, 0.4 part of modified starch, 0.5 part of glass fiber, 1 part of graphite fiber powder, 70 parts of water and a plurality of face-protecting paper are added. Stirring and dispersing the water, the water reducing agent and the weight starch uniformly to form slurry, foaming a foaming agent in a foaming machine, simultaneously adding the plaster, the glass fiber and the graphite fiber powder into a stirrer, forming on a facing paper after uniformly stirring, and waiting for forming and drying of the gypsum plaster board to obtain the common gypsum board with the specification of 300cm in length, 120cm in width and 0.9cm in thickness.
The phase-change energy-storage gypsum board prepared in the embodiment 1 is compared with a common gypsum board prepared in the comparative example 1 in a heat preservation and heat insulation experiment under a set condition, and electric heating films with adjustable electric power are attached to the front surface and the back surface of the gypsum board so as to ensure that a gypsum board sample can be heated to a specified temperature. Setting conditions that the indoor temperature is 10 ℃, the outdoor temperature is 10 ℃ and the initial temperature is 10 ℃, starting an electric heating film on the surface of a gypsum board sample to simultaneously start heating the gypsum board sample, removing the electric heating film on the surface of the sample when the internal temperature of the sample reaches 40 ℃, moving the sample to an outdoor environment for natural cooling, and recording data of a sample internal temperature probe in the process as shown in table 1.
TABLE 1
Example 2
The embodiment provides a preparation method of a sandwich phase-change energy-storage gypsum board, which comprises the following steps:
the method comprises the following steps: and (4) preparing a phase change material product. Firstly, a plurality of rectangular parallelepipeds are prepared, and the sizes of cavities are as follows: a mold having a length of 30cm, a width of 2.5cm and a height of 0.35cm, and an open plastic bag having the same shape and a thickness of 20 μm was previously placed in the rectangular parallelepiped mold. And then melting lauric acid with a melting point of 44 ℃ (namely the phase transition temperature is about 44 ℃), pouring the lauric acid into an open plastic bag of the cuboid mold, sealing, and cooling the phase transition material to obtain a plurality of phase transition material products which are sealed with the phase transition material, have the length of 30cm, the width of 2.5cm, the height of 0.35cm, are cuboids and have plastic shells. After the phase change material product is manufactured, a plurality of identical phase change material products are connected with each other by a water-soluble PVA fiber strip according to the transverse (along the short side direction of the gypsum board) and the longitudinal (along the long side direction of the gypsum board) intervals of 5cm, and a connected reticular phase change material product group is manufactured.
Step two: and (4) preparing the phase-change energy-storage gypsum board. According to the weight ratio of the formula, 100 parts of calcined gypsum powder, 0.3 part of water reducing agent, 0.01 part of foaming agent, 0.4 part of modified starch, 0.5 part of glass fiber, 1 part of alumina powder, 70 parts of water and a plurality of face protecting paper of the desulfurized gypsum. The water, the water reducing agent and the modified starch are stirred and dispersed uniformly to form slurry, meanwhile, a foaming agent in a foaming machine is foamed, and then the calcined gypsum, the glass fiber and the alumina powder are added into a stirrer simultaneously to form the slurry, so that gypsum slurry is obtained. And (2) paving a layer of gypsum slurry on the upper protective paper, then flatly paving the phase-change material product group prepared in the step one on the gypsum slurry (enabling the length, the width and the height of the phase-change material product to be respectively positioned in the length, the width and the thickness direction of the gypsum board to be formed), pouring a layer of gypsum slurry on the phase-change material product group, finally paving a lower protective paper on the second layer of gypsum slurry, covering edges of the gypsum slurry, and waiting for the forming and drying of the gypsum board, thus finishing the preparation, and preparing the phase-change energy storage gypsum board containing the phase-change material product with the specification of 300cm in length, 120cm in width and 0.9cm in thickness.
The plastic bag is made of polyvinyl chloride.
The total volume of the phase change material product contained in the phase change gypsum board is about 10% of the core volume of the phase change gypsum board.
Comparative example 2
The ordinary gypsum board of this comparative example differs from the sandwiched phase change energy storage gypsum board of example 2 only in that: the gypsum board does not contain phase change material products.
Preparation of ordinary gypsum board: according to the weight ratio of the formula, 100 parts of calcined gypsum powder, 0.3 part of water reducing agent, 0.01 part of foaming agent, 0.4 part of modified starch, 0.5 part of glass fiber, 1 part of alumina powder, 70 parts of water and a plurality of face protecting paper of the desulfurized gypsum. The water, the water reducing agent and the starch are stirred and dispersed uniformly to form slurry, meanwhile, a foaming agent in a foaming machine is foamed, then, the plaster, the glass fiber and the alumina powder are added into a stirrer simultaneously to form slurry, the slurry is stirred uniformly and then is formed on the surface protecting paper, and finally, the gypsum board is obtained after drying.
The phase-change energy-storage gypsum board prepared in the embodiment 2 is compared with a common gypsum board prepared in the comparative example 2 in a heat preservation and heat insulation experiment under a set condition, and the electric heating film with adjustable electric power is attached to the front surface and the back surface of the gypsum board, so that the gypsum board sample can be heated to a specified temperature by the electric heating film. Setting conditions that the indoor temperature is 10 ℃, the outdoor temperature is 10 ℃ and the initial temperature is 10 ℃, starting an electric heating film on the surface of a gypsum board sample to simultaneously start heating the gypsum board sample, removing the electric heating film on the surface of the sample when the internal temperature of the sample reaches 60 ℃, moving the sample to an outdoor environment for natural cooling, and recording data of a sample internal temperature probe in the process as shown in table 2.
TABLE 2
Example 3
The embodiment provides a preparation method of a sandwich phase-change energy-storage gypsum board, which comprises the following steps:
the method comprises the following steps: and (4) preparing a phase change material product. Firstly, preparing a plurality of rectangular cavities with the sizes of the cavities as follows: and (2) a stainless steel round tube with the length of 30cm and the diameter of 1.6cm, melting hexadecane with the melting point of 18 ℃ (namely the phase change temperature is about 18 ℃) and pouring the hexadecane into the stainless steel round tube, cooling the phase change material, and sealing the phase change material by using a stainless steel round cover with a sealing ring to obtain a plurality of phase change material products which are 30cm in length, 1.6cm in diameter, cylindrical in shape and stainless steel in shell and are sealed with the phase change material. After the phase change material product is manufactured, a plurality of identical phase change material products are connected with each other by a water-soluble PVA fiber strip according to the transverse (along the short side direction of the gypsum board) and the longitudinal (along the long side direction of the gypsum board) intervals of 5cm, and a connected reticular phase change material product group is manufactured.
Step two: and (4) preparing the phase-change energy-storage gypsum board. According to the weight ratio of the formula, 100 parts of calcined gypsum powder, 0.3 part of water reducing agent, 0.01 part of foaming agent, 0.4 part of modified starch, 0.5 part of glass fiber, 1 part of silicon carbide powder, 70 parts of water and a plurality of face protecting paper of the desulfurized gypsum. The water, the water reducing agent and the modified starch are stirred and dispersed uniformly to form slurry, meanwhile, a foaming agent in a foaming machine is foamed, and then the calcined gypsum, the glass fiber and the silicon carbide powder are added into a stirrer simultaneously to form the slurry, so that gypsum slurry is obtained. And (2) paving a layer of gypsum slurry on the upper protective paper, then flatly paving the phase-change material product group prepared in the step one on the gypsum slurry (enabling the length and the diameter of the phase-change material product to be located in the length and width (thickness) directions of the gypsum board to be formed), pouring a layer of gypsum slurry on the phase-change material product group, finally paving a lower protective paper on the second layer of gypsum slurry, covering edges of the gypsum slurry, and waiting for the forming and drying of the gypsum board with paper surfaces to finish the preparation, thus obtaining the phase-change energy storage gypsum board with the specification of 300cm in length, 120cm in width and 2.5cm in thickness and containing the phase-change material product.
The thickness of the stainless steel pipe is 0.1 mm.
The total volume of the phase change material product contained in the phase change gypsum board is about 10% of the core volume of the phase change gypsum board.
Comparative example 3
The ordinary gypsum board of this comparative example differs from the sandwiched phase change energy storage gypsum board of example 3 only in that: the gypsum board does not contain phase change material products.
Preparation of ordinary gypsum board: according to the weight ratio of the formula, 100 parts of calcined gypsum powder, 0.3 part of water reducing agent, 0.01 part of foaming agent, 0.4 part of modified starch, 0.5 part of glass fiber, 1 part of silicon carbide powder, 70 parts of water and a plurality of face protecting paper of the desulfurized gypsum. The water, the water reducing agent and the starch are stirred and dispersed uniformly to form slurry, meanwhile, a foaming agent in a foaming machine is foamed, then, the plaster, the glass fiber and the silicon carbide powder are added into a stirrer simultaneously to form the slurry, the slurry is formed on the facing paper after being stirred uniformly, and then, the gypsum board with the specification of 300cm in length, 120cm in width and 2.5cm in thickness is obtained after drying.
The phase change energy storage gypsum board prepared in the embodiment 3 is compared with the common gypsum board prepared in the comparative example 3 in a heat preservation and heat insulation experiment under a set condition, and the electric heating films with adjustable electric power are attached to the front surface and the back surface of the gypsum board so as to ensure that the gypsum board sample can be heated to a specified temperature by the electric heating films. Setting conditions that the indoor temperature is 10 ℃, the outdoor temperature is 10 ℃ and the initial temperature is 10 ℃, starting an electric heating film on the surface of a gypsum board sample to simultaneously start heating the gypsum board sample, removing the electric heating film on the surface of the sample when the internal temperature of the sample reaches 40 ℃, moving the sample to an outdoor environment for natural cooling, and recording data of a sample internal temperature probe in the process as shown in table 3.
TABLE 3
From tables 1 to 3, it can be seen that the phase change energy storage gypsum board has the advantages of having an obvious temperature regulation and energy storage effect, increasing the time for feeling comfortable indoors (for example, the time taken from the process of starting to increase the temperature to 20 ℃ and then to decrease the temperature to 20 ℃) and reducing the energy consumption of buildings compared with the common gypsum board.
Comparative example 4
Preparation of a sandwich phase-change energy-storage gypsum board (a phase-change material product is integrated):
the method comprises the following steps: and (3) preparing an integrated phase change material product. Firstly, a mold with the length of 250cm, the width of 80cm, the height of 0.5cm and the shape of a cuboid is prepared, and an open plastic bag with the same shape as the mold is placed in the cuboid mold in advance. And then melting paraffin with the phase transition temperature of 20 ℃, pouring the molten paraffin into an open plastic bag of the cuboid mold, sealing, and cooling the paraffin to obtain the integral phase-change material product which is 250cm long, 80cm wide, 0.5cm high, cuboid in shape and plastic in shell and sealed with the paraffin.
Step two: and (4) preparing the phase-change energy-storage gypsum board. According to the weight ratio of the formula (same as that of the example 1), 100 parts of calcined gypsum powder, 0.3 part of water reducing agent, 0.01 part of foaming agent, 0.4 part of modified starch, 0.5 part of glass fiber, 1 part of graphite fiber powder, 70 parts of water and a plurality of face protecting paper are adopted. Firstly, uniformly stirring and dispersing the water, the water reducing agent and the modified starch to form slurry, simultaneously foaming a foaming agent in a foaming machine, simultaneously adding the calcined gypsum, the glass fiber and the graphite fiber powder into a stirrer to form slurry to obtain gypsum slurry, a layer of gypsum slurry is laid on the upper protective paper, then the integrated phase-change material product prepared in the step one is flatly laid on the gypsum slurry (the length, the width and the height of the integrated phase-change material product are respectively positioned in the length direction, the width direction and the thickness direction of a gypsum board to be formed), pouring a layer of gypsum slurry on the phase-change material product group, laying a lower protective paper on the second layer of gypsum slurry, covering edges of the gypsum slurry, waiting for the gypsum plaster board to be formed and dried, and finishing the manufacture to obtain the phase change energy storage gypsum board containing the phase change material product with the specification of 300cm in length, 120cm in width and 0.9cm in height.
The plastic bag is made of polyvinyl chloride and has a thickness of 60 mu m.
The total volume of the phase change material product contained in the phase change gypsum board is about 30% of the core volume of the phase change gypsum board.
The phase-change heat-storage gypsum board prepared in example 1 and the sandwiched phase-change energy-storage gypsum board prepared in comparative example 4 (the phase-change material product is integrated) are vertically placed to simulate the practical application of gypsum boards, heat preservation and insulation experiments are carried out under set conditions, the set conditions are that the indoor temperature is 10 ℃, the initial temperature is 10 ℃, heating is started simultaneously in an oven with the temperature set to be 40 ℃, when the internal temperature of a sample reaches 40 ℃, the sample is moved out of the oven and placed in an indoor environment for natural cooling, and the data recorded by a sample internal temperature probe in the process are shown in table 4.
TABLE 4
As can be seen from tables 1 and 4, the temperature regulation performance of the phase change energy storage gypsum board prepared in example 1 is close to that of the phase change energy storage gypsum board prepared in comparative example 4 (the phase change material product is integrated), but after 100 temperature cycle experiments, the sandwiched phase change energy storage gypsum board prepared in comparative example 4 (the phase change material product is integrated) is found to have uneven bottom and bulge. The reason is that the phase-change material in the integrated phase-change material product flows to the bottom under the influence of gravity, and the surface of the gypsum board bulges along with the expansion with heat and contraction with cold in the multiple phase-change processes, so that the integrated phase-change material product has obvious defects and influences the use. And the integrated phase-change material product cannot be cut, so that the practical application of the phase-change gypsum board is limited. Therefore, the sandwich phase-change energy-storage gypsum board provided by the application has the advantages of energy storage, temperature regulation, convenience in application, long service life and the like.
Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.
Claims (10)
1. The sandwich phase-change energy-storage gypsum board comprises a core and a plurality of phase-change material products, wherein the core comprises a shell and a phase-change material packaged inside the shell.
2. The sandwich phase change energy storage gypsum board of claim 1 wherein the shell is made of plastic or stainless steel; optionally, the plastic is polyethylene, polyvinyl chloride, polypropylene, polystyrene, polyamide, or thermoplastic polyester.
3. The sandwich phase change energy storage gypsum board of claim 1, wherein the shell is a cuboid having a length of 30-50cm, a width of 2.5-5cm, and a height of 0.35-1.25 cm; or the shell is a cylinder, the length of the shell is 30-50cm, and the diameter of the shell is 1.6-2 cm;
optionally, the thickness of the shell is 20-100 μm.
4. The sandwiched phase change energy storing gypsum board of claim 1, wherein the phase change material is selected from any one or more of organic phase change heat storage materials, optionally, from any one or more of paraffin, lauric acid, palmitic acid, hexadecane, and octadecane.
5. The sandwiched phase change energy storage gypsum board of claim 1, wherein the core of the sandwiched phase change energy storage gypsum board comprises a thermally conductive material, optionally the thermally conductive material is selected from any one or more of graphite fiber powder, aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride, boron nitride, and silicon carbide.
6. The sandwiched phase change energy storing gypsum board of any one of claims 1-5, wherein the total volume of the plurality of phase change material articles comprises 10-30% of the core volume of the sandwiched phase change energy storing gypsum board;
optionally, the plurality of phase change material articles are distributed in an array in the core of the sandwiched phase change energy storage gypsum board; also optionally, the plurality of articles of phase change material are spaced 2-5cm apart in the transverse direction and 5cm apart in the longitudinal direction.
7. The sandwiched phase change energy storing gypsum board of any one of claims 1-5, wherein in the process of making the sandwiched phase change energy storing gypsum board, a plurality of phase change material products are connected together by a connecting band to form a set of phase change material products, one or more of the sets of phase change material products are laid flat on a gypsum slurry, and a gypsum slurry is cast on the one or more sets of phase change material products;
optionally, the connecting band is a plastic connecting band or a water-soluble PVA fiber strip.
8. A method of making a sandwiched phase change energy storage gypsum board, the method comprising:
preparation of phase change material article group: melting the phase-change material, pouring the melted phase-change material into a shell, sealing the shell, and cooling the phase-change material to obtain a phase-change material product; connecting a plurality of phase change material products together through a connecting belt to form a phase change material product group;
preparing a phase-change energy-storage gypsum board: and paving a layer of gypsum slurry on the upper protective paper, flatly paving one or more phase-change material product groups on the gypsum slurry, paving a layer of gypsum slurry on the one or more phase-change material product groups, paving the lower protective paper, covering edges of the gypsum slurry, molding and drying to obtain the sandwich phase-change energy-storage gypsum board.
9. The method of claim 8, wherein the housing is made of plastic or stainless steel; optionally, the plastic is polyethylene, polyvinyl chloride, polypropylene, polystyrene, polyamide, or thermoplastic polyester; optionally, the shell is a cuboid, the length of the shell is 30-50cm, the width of the shell is 2.5-5cm, and the height of the shell is 0.35-1.25 cm; or the shell is a cylinder, the length of the shell is 30-50cm, and the diameter of the shell is 1.6-2 cm; also optionally, the shell has a thickness of 20-100 μm;
optionally, the phase change material is selected from any one or more of organic phase change heat storage materials, and also optionally selected from any one or more of paraffin, lauric acid, palmitic acid, hexadecane and octadecane;
optionally, the total volume of the phase-change material product contained in the sandwich phase-change energy-storage gypsum board accounts for 10-30% of the core volume of the sandwich phase-change energy-storage gypsum board;
optionally, the connecting band is a plastic connecting band or a water-soluble PVA fiber strip;
optionally, the core of the sandwich phase-change energy-storage gypsum board contains a heat-conducting material, and further optionally, the heat-conducting material is selected from any one or more of graphite fiber powder, aluminum oxide, magnesium oxide, zinc oxide, aluminum nitride, silicon carbide and boron nitride.
10. A sandwich phase change energy storage gypsum board made by the method of claim 8 or 9.
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