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Energy-storing building wall structure containing double-layer phase-change material plate

A phase change material and building wall technology, applied in building components, building structures, buildings, etc., to reduce heat loss, make and install simple and fast, and reduce energy consumption.

Inactive Publication Date: 2017-12-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the double-layer phase change material plate is assembled by inorganic hydra

Method used

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  • Energy-storing building wall structure containing double-layer phase-change material plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The aluminum veneer with a thickness of 3mm is selected as the exterior panel, the 10mm polystyrene foam board is used as the interior and exterior insulation panels, the 200mm concrete wall is used as the wall layer, and the 2mm aluminum gusset is used as the interior panel.

[0026] Mix anhydrous calcium chloride and distilled water in a molar ratio of 1:6 to obtain calcium chloride hexahydrate, add strontium chloride hexahydrate with 2% mass of calcium chloride hexahydrate as a nucleating agent, and calcium chloride hexahydrate 0.5% by mass of hydroxyethyl cellulose is used as a thickening agent, and the mixture is uniform to obtain an inorganic hydrated salt with low supercooling and no phase separation; % mass ratio of the two to obtain calcium chloride hexahydrate / expanded graphite composite phase change material. The obtained material has a phase transition peak temperature of 30° C., a phase transition enthalpy value of 120 J / g, no supercooling and phase separat...

Embodiment 2

[0031]With reference to Example 1, the difference is that the wall body does not have an internal thermal insulation board, and the inorganic hydrated salt adopted by the external shape-setting phase change material board is a co-mixture obtained by mixing calcium chloride hexahydrate and magnesium nitrate hexahydrate in a mass ratio of 92:8. Instead of crystalline salt, the phase transition peak temperature of the obtained material is 28°C, the phase transition enthalpy value is 100J / g, the degree of undercooling is small, there is no phase separation phenomenon, and the stability is good. The test results of Example 1 show that, compared with the reference room, in summer, the indoor temperature fluctuation of the phase change room is reduced by 2.6 °C, and the peak temperature appearance time is delayed by 1.5 hours; in winter, the indoor temperature fluctuation of the phase change room is reduced by 1.7 ℃. ℃, the peak temperature appeared time delayed by 1h. It can be seen...

Embodiment 3

[0033] The aluminum-plastic board with a thickness of 4mm is selected as the exterior panel, the 10mm mineral wool board is used as the external insulation board, the 240mm brick wall is used as the wall layer, the 20mm polystyrene foam board is used as the internal insulation board, and the 12mm gypsum board is used as the interior. panel.

[0034] After the sodium sulfate decahydrate is heated and melted at a constant temperature, borax of 3% by mass of sodium sulfate decahydrate is added as a nucleating agent, and carboxymethyl cellulose of 1% by mass of sodium sulfate decahydrate is used as a thickener to obtain low supercooling, no Phase-separated inorganic hydrated salt; according to the mass ratio of the obtained low-supercooled, non-phase-separated inorganic hydrated salt 50% and expanded perlite carrier 50%, the two are compounded to obtain sodium sulfate decahydrate / expanded perlite composite phase change material. The obtained material has a phase transition peak te...

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Abstract

The invention discloses an energy-storing building wall structure containing a double-layer phase-change material plate. The building wall structure includes an exterior finishing plate, an exterior heat-insulation plate, an exterior shaping phase-change material plate, a wall layer, an interior shaping phase-change material plate, an interior heat-insulation plate and an interior finishing plate in sequence from exterior to interior, wherein the finishing plates, the heat-insulation plates and the shaping phase-change material plates are combined together to form a novel finishing heat-insulation plate, the exterior and interior shaping phase-change material plates are composed of a novel inorganic composite phase-change material and an encapsulating material thereof, and a high-temperature-resistant fire-prevention material is attached to the surface of the encapsulating material. According to the energy-storing building wall structure containing the double-layer phase-change material plate, the two materials with different phase-change temperatures are combined with a wall, not only are production and installation convenient and fast, but also the effect of heat insulation is good, the application range is wide, the energy-storing effect of the phase-change material is exerted in different seasons, the living comfort level of indoor environment can be effectively improved, and building energy consumption is reduced.

Description

technical field [0001] The invention belongs to the field of passive building energy saving, and in particular relates to an energy storage building wall structure containing double-layer phase change material plates. Background technique [0002] With the rapid development of the construction industry and the improvement of people's quality of life, building energy consumption has become my country's three major "energy consumers" together with industrial energy consumption and transportation energy consumption. At present, the lightweight envelope structure used in buildings can reduce the load-bearing of the building structure itself, and has a certain thermal insulation effect. However, ordinary lightweight materials have the disadvantages of small heat capacity and poor heat storage capacity, which often causes the indoor temperature to rise. Large fluctuations, the heating and cooling energy consumption caused by it accounts for 20 to 50% of the total energy consumptio...

Claims

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Application Information

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IPC IPC(8): E04B2/00E04F13/075C09K5/06
CPCE04B2/00C09K5/063E04F13/0875E04F2290/04E04F2290/047
Inventor 张正国方晓明叶荣达
Owner SOUTH CHINA UNIV OF TECH
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