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Phase-change energy-storage building insulation structure

A technology for building thermal insulation and phase change energy storage, which is applied to building components, building structures, thermal insulation, etc. It can solve problems such as limiting the practical application of building walls, high prices of organic phase change materials, and affecting the sustainability of phase change materials. Achieve the effect of large latent heat of phase change, overcome easy phase separation and supercooling, and improve environmental comfort

Inactive Publication Date: 2017-10-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since paraffin, polyethylene and expanded graphite are all flammable, there are fire safety hazards, and the price of organic phase change materials is generally high, which limits their practical application in building walls
However, the direct use of inorganic phase materials has the disadvantages of easy phase separation and large undercooling, which affects the sustainability of phase change materials in wall applications.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The wall base 1 is made of sand-lime brick and cement plaster layer. An EPS foam board with a thickness of 200mm is selected as the thermal insulation layer 2, and a plywood board with a thickness of 100mm is selected as the directional structure board 3. The inorganic hydrated magnesium chloride hexahydrate and magnesium nitrate hexahydrate are mixed and melted to obtain molten magnesium chloride hexahydrate / magnesium nitrate hexahydrate phase change material, and then compounded with the expanded graphite carrier to obtain a novel inorganic composite phase of expanded graphite-based magnesium chloride hexahydrate / magnesium nitrate hexahydrate The phase change temperature is 40℃, and the molten magnesium chloride hexahydrate / magnesium nitrate hexahydrate phase change material accounts for 95% of the composite phase change material. The composite phase change material is solid at room temperature. Choose a ring with a mass fraction of 5% The oxyacrylate resin is photocur...

Embodiment 2

[0041] Referring to Example 1, the difference is that the insulation board is a ceramic insulation board with a thickness of 100 mm. The test experiment shows that the temperature fluctuation in the experimental room is reduced by 16°C, and the maximum temperature is delayed by 80 minutes, and the temperature fluctuation in the reference room is reduced by 8°C, and the maximum temperature is delayed by 10 minutes, indicating that there is a fixed phase change energy storage The wall structure of the insulation board has more excellent heat storage capacity, can significantly improve the thermal inertia of the wall, delay the appearance of the indoor peak temperature, and fully reduce the range of indoor temperature fluctuations. The thermal insulation effect of this laboratory room is slightly worse than that of the laboratory room of Example 1, because the thermal conductivity of the ceramic thermal insulation board is higher than that of the EPS foam board, and the thickness o...

Embodiment 3

[0043] Referring to Example 1, the difference is that the thermal insulation board is an XPS extruded board with a thickness of 50 mm.

[0044] The test experiment with Example 1 shows that the temperature fluctuation in the experimental room is reduced by 17°C, the maximum temperature is delayed by 85 minutes, and the temperature fluctuation in the reference room is reduced by 9°C, and the maximum temperature is delayed by 15 minutes, indicating that the phase change energy storage is included The wall structure of the insulation board has more excellent heat storage capacity, can significantly improve the thermal inertia of the wall, delay the appearance of the indoor peak temperature, and fully reduce the range of indoor temperature fluctuations. The thermal insulation effect of this laboratory room is similar to that of Example 1, because the thermal conductivity of the XPS extruded board thermal insulation board is lower than that of the EPS foam board.

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Abstract

The invention discloses a phase-change energy-storage building insulation structure. A wall structure is successively provided with a wall substrate, an insulation layer, a directional structural plate, a fixed-form phase-change energy-storage insulation board and an exterior board in the direction from outdoor to indoor, and the fixed-form phase-change energy-storage insulation board comprises an inorganic composite phase change material and a packaging plate; the inorganic composite phase change material is composited from inorganic hydrated salt and a porous structure carrier, and the phase transition temperature of the phase change material is 10-40 DEG C; in inorganic composite phase change material, the weight percentage content of the inorganic hydrated salt is 40-95%, and the inorganic composite phase change material is coated with light-cured resin with fire resistance and corrosion resistance. The phase-change energy-storage building insulation structure has the good effects of heat preservation and thermal insulation, and can store cold quantity in outdoor air at summer night in the phase-change energy-storage insulation board; in the daytime, the stored cold quantity is released into indoor air so as to prolong the time of an indoor peak temperature, reduce the fluctuation of the indoor temperature, improve the environmental comfort and reduce the energy consumption of an air conditioner in summer.

Description

Technical field [0001] The invention relates to a building thermal insulation structure, in particular to a phase change energy storage building thermal insulation structure, and belongs to the technical field of building thermal insulation. Background technique [0002] With the continuous development of the social economy, the proportion of energy consumed by building heating and cooling in the total energy consumption is constantly rising. Specifically, building energy consumption accounts for approximately 32% of global energy consumption, and greenhouse gas emissions caused by buildings can reach 30% of its total. Traditional lightweight building materials have small heat capacity and poor heat storage capacity, which cannot meet people's requirements for environmental comfort. The development of new building energy storage materials is of great significance to the realization of building energy saving. [0003] The phase change material has a large latent heat value and ener...

Claims

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Application Information

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IPC IPC(8): E04B2/00C09K5/06F24F5/00
CPCF24F5/0017C09K5/063E04B2/00Y02E60/14F28D20/023E04B1/7608E04B1/7675E04B1/80E04B2103/00F28D2020/0008
Inventor 张正国方晓明付露露
Owner SOUTH CHINA UNIV OF TECH
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