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Preparation method of expanded-graphite-base hydrated salt composite solid-solid phase-change energy storage material

A technology of phase change energy storage material and expanded graphite, applied in the field of inorganic composite materials, can solve problems such as supercooling

Inactive Publication Date: 2015-04-22
YUNNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they have supercooling and phase separation phenomena. After a lot of research, these problems have been solved to a certain extent.

Method used

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  • Preparation method of expanded-graphite-base hydrated salt composite solid-solid phase-change energy storage material
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  • Preparation method of expanded-graphite-base hydrated salt composite solid-solid phase-change energy storage material

Examples

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Effect test

Embodiment 1

[0023] The preparation method of the expanded graphite (graphite foam) / sodium sulfate decahydrate hydrated salt composite solid-solid phase change energy storage material comprises the following steps:

[0024] (1) According to the proportioning of Table 1, with the mass ratio of sodium sulfate decahydrate: expanded graphite (graphite foam): borax=90:8:2, take by weighing 90g of sodium sulfate decahydrate, expanded graphite (graphite foam) 8g , 2 g of borax, put it into a 500 mL suction filter bottle, and add 16 g of distilled water at the same time;

[0025] (2) The mouth of the suction filter bottle is tightly plugged with a silicone plug to ensure no air leakage, the suction filter is plugged with filter cotton to prevent debris such as expanded graphite from entering the vacuum pump, and the suction filter is connected to the vacuum pump;

[0026] (3) Heat the suction filter bottle containing the phase change energy storage material in an ultrasonic constant temperature wa...

Embodiment 2

[0031] The preparation method of the expanded graphite (graphite foam) / calcium chloride hexahydrate hydrated salt composite solid-solid phase change energy storage material comprises the following steps:

[0032] (1) According to the proportioning of table 1, with calcium chloride hexahydrate: expanded graphite (graphite foam): the mass proportion of borax=89:8:3, take calcium chloride hexahydrate 89g, expanded graphite (graphite foam) Foam) 8g, borax 3g, put into 500 mL suction filter bottle, add 16g distilled water simultaneously;

[0033] (2) The mouth of the suction filter bottle is tightly plugged with a silicone plug to ensure no air leakage, the suction filter is plugged with filter cotton to prevent debris such as expanded graphite from entering the vacuum pump, and the suction filter is connected to the vacuum pump;

[0034] (3) Heat the suction filter bottle containing the phase change energy storage material in an ultrasonic constant temperature water bath at 38°C, an...

Embodiment 3

[0039] The preparation method of the expanded graphite (graphite foam) / dodecahydrate disodium hydrogen phosphate hydrated salt composite solid-solid phase change energy storage material comprises the following steps:

[0040] (1) According to the proportioning of Table 1, with disodium hydrogen phosphate dodecahydrate: expanded graphite (graphite foam): the mass proportion of activated alumina=88.5:8:3.5, take disodium hydrogen phosphate dodecahydrate 88.5g, expanded graphite (graphite foam) 8g, activated alumina 3.5g, put into 500mL suction filter bottle, add 16g distilled water at the same time;

[0041] (2) The mouth of the suction filter bottle is tightly plugged with a silicone plug to ensure no air leakage, the suction filter is plugged with filter cotton to prevent debris such as expanded graphite from entering the vacuum pump, and the suction filter is connected to the vacuum pump;

[0042] (3) Heat the suction filter bottle containing the phase change energy storage m...

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Abstract

The invention provides a preparation method of a graphite foam (GF) or expanded graphite (EG) / inorganic hydrated salt composite solid-solid phase-change energy storage material. The method comprises the following steps: adding 6-10 wt% of EG or GF into an inorganic hydrated salt phase-change material, adding distilled water which is 2 times by mass of the EG or GF, adding a corresponding nucleator, and carrying out vacuum adsorption in a water bath with the temperature of 5-20 DEG C higher than hydrated salt phase-change temperature for 1-3 hours while continuously stirring and vibrating or carrying out ultrasonic vibration. The composite solid-solid phase-change energy storage material thoroughly solves the problem of phase separation of the inorganic hydrated salt, has the characteristics of low degree of supercooling, favorable heat-conducting property, small phase-change volume change, stable performance and no leakage, and is convenient for packaging.

Description

Technical field [0001] The present invention involves a composite phase-changing energy storage material, especially a preparation method for expanding graphite inorganic hydrophilic salt-solid-phase transformer energy storage materials, which belongs to the field of inorganic composite materials. Background technique [0002] Due to the rise in energy prices, the risk of fossil energy depletion, the development of renewable resources and the recovery of renewal heat is imperative. However, most of these resources can be low and unstable, such as solar energy and wind energy.Therefore, energy storage must be performed to store energy that is temporarily unused, and it is released when it is needed. [0003] The advantages of economy, but there are disadvantages such as low energy storage density, large quality, volume, and large temperature changes; chemical energy storage relies on reversible chemical reactions for energy storage. It has high energy storage density, but it is di...

Claims

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Application Information

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IPC IPC(8): C09K5/02
CPCC09K5/02
Inventor 季旭冷从斌罗熙李明余琼粉李海丽
Owner YUNNAN NORMAL UNIV
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