Liquid metal composite phase change energy storage material and preparation method and application thereof

A composite phase change material and liquid metal technology, applied in the field of liquid metal composite phase change energy storage materials and their preparation, can solve the problems of inability to meet the transportation and preservation requirements of perishable food, increased pressure on environmental protection, increased transportation costs, and the like , to achieve the effect of simple production, good stability and simple preparation process

Active Publication Date: 2019-05-21
YUNNAN KEWEI LIQUID METAL VALLEY R & D CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the transportation and storage of perishable food need to be carried out in a low-temperature environment, but at present, the refrigerated transportation of food is basically realized through the refrigeration of on-board compressors. Using fuel oil as the energy source not only increases the transportation cost, but also makes the The pressure of environmental protection is increasing; and the ice-water mixture is mainly used as the cold source in short-distance transportation, which basically can only provide a transportation environment of 0-10°C, which cannot meet the transportation and storage requirements of most perishable foods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 A liquid metal composite phase change energy storage material

[0018] Accurately weigh 50.00g liquid metal (GaInSn 10 ) into a 250mL beaker, then add 70.00g molten salt (MgCl 2 , ZnCl 2 Eutectic mixture composed of a mass ratio of 2.5:1), stirring at 2000-2500r / min until the molten salt and liquid metal are completely mixed.

[0019] At room temperature, after standing for 24 hours, no stratification can be seen.

[0020] Its thermal conductivity is tested to be 13.27W / (m·℃), and the latent heat value of phase change can reach 240kJ / L.

Embodiment 2

[0021] Embodiment 2 A liquid metal composite phase change energy storage material

[0022] Accurately weigh 30.00g liquid metal (BiPbSn 18 ) in a 100.0mL beaker, heated to 110°C and kept at a constant temperature, then added 50.00g of molten salt (Ca(NO 3 ) 2 、KNO 3 、NaNO 3 、NaNO 2 Eutectic mixture composed of a mass ratio of 45:40:10:5), stirred at 2000-2500r / min until the molten salt and liquid metal are completely mixed.

[0023] At room temperature, after standing for 24 hours, no stratification can be seen.

[0024] Its thermal conductivity is tested to be 24.46W / (m·℃), and the latent heat value of phase change can reach 208kJ / kg.

Embodiment 3

[0025] Embodiment 3 A liquid metal composite phase change energy storage material

[0026] Accurately weigh 24.00g liquid metal (KNa 22 ) was placed in a 100mL beaker, the temperature of the beaker was controlled at 40°C, and then 48.00g of molten salt (NH 4 Cl, K 2 SO 4 , (NH 4 ) 2 S 2 o 8 , (NH 4 ) 2 SO 4 Eutectic mixture composed of a mass ratio of 50:22:12:16), stirred at 2000-2500r / min until the molten salt and liquid metal are completely mixed.

[0027] At room temperature, after standing for 24 hours, no stratification can be seen.

[0028] The test shows that its thermal conductivity is 19.39W / (m·℃), and the latent heat value of phase change can reach 279kJ / L.

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PUM

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Abstract

The invention relates to a liquid metal composite phase change energy storage material and a preparation method and application thereof. The liquid metal composite phase change energy storage materialis composed of a liquid metal and a molten salt in a mass ratio of 1: (1-2). The prepared liquid metal composite phase change energy storage material has characteristics of high thermal conductivity,good stability, simple manufacture and the like; and the preparation process is simple and easy to operate. The prepared liquid metal composite phase change energy storage material has the thermal conductivity of 13-25 W/(m. degrees) and latent heat value of phase change of 208-279 kj/L, can be widely applied in fields of perishable food storage and transportation, solar energy storage, chemicalengineering and the like, and can meet different heat transfer and heat storage and energy storage requirements.

Description

technical field [0001] The invention relates to the field of molten salt and liquid metal, in particular to a liquid metal composite phase change energy storage material and its preparation method and application. Background technique [0002] The melting or crystallization of any substance will be accompanied by a change in heat. Making full use of the heat change when the substance melts or crystallizes can save a lot of energy. However, in the fields of solar thermal power generation, nuclear power, heat storage and heat transfer, food refrigerated transportation, chemical industry, drying, etc., the requirements for heat transfer, heat storage and energy storage materials are different. For example, the transportation and storage of perishable food need to be carried out in a low-temperature environment, but at present, the refrigerated transportation of food is basically realized through the refrigeration of on-board compressors. Using fuel oil as the energy source not ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 彭胜金邓中山田鹏李颖蔡昌礼
Owner YUNNAN KEWEI LIQUID METAL VALLEY R & D CO LTD
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