Low-phase-transition-temperature heat storage material and preparation method thereof

A technology of phase change temperature and heat storage materials, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of limited heat storage density and high price, and achieve the effect of high heat storage density

Inactive Publication Date: 2017-05-31
贺迈新能源科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the phase change materials that have been actually used in such applications on the market, organic phase change materials are more common, but their heat storage density is limited and the price is relatively expensive.

Method used

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  • Low-phase-transition-temperature heat storage material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A thermal storage material with a low phase transition temperature is prepared using the following quality material-grade steps: 92g sodium acetate trihydrate, 2g potassium chloride, 3g deionized water, 1g starch, and 2g sodium pyrophosphate.

[0026] When preparing, first heat and melt sodium acetate trihydrate and potassium chloride, then replenish 3g of water, after complete clarification, add starch and stir to thicken, then add sodium pyrophosphate, after stirring evenly, take out the sample, and make it after cooling to solidify Differential scanning calorimetry analysis and T-t curve, use differential calorimetry scanner (DSC) to test its phase transition temperature, obtain as figure 1 The phase change material is measured to have a phase change latent heat of 275kJ / kg, a phase change temperature of 55°C, and a heat storage density (45-75°C) of 390kJ / L, which can be used in hand warmers and other fields.

Embodiment 2

[0028] A heat storage material with a low phase transition temperature, prepared using the following quality material-level steps: 83.8g sodium acetate trihydrate, 8g magnesium nitrate, 4g deionized water, 1.2g carboxymethyl cellulose, and 3g expanded graphite.

[0029] When preparing, first heat and melt sodium acetate trihydrate and magnesium nitrate, then replenish 4g of water, after complete clarification, add carboxymethyl cellulose to stir and thicken, then add expanded graphite, after stirring evenly, take out the sample, and wait for cooling and solidification Doing differential scanning calorimetry analysis and T-t curve, it is determined that the latent heat of phase transition is 250kJ / kg, the phase transition temperature is 48°C, and the heat storage density (40-70°C) is 370kJ / kg, which can be obtained in the field of small kitchen treasures. application.

Embodiment 3

[0031] A heat storage material with a low phase transition temperature, prepared using the following quality material-level steps: 75g of sodium acetate trihydrate, 17g of lithium chloride, 4g of deionized water, 1g of polyacrylamide, and 3g of carbon nanotubes.

[0032] When preparing, first heat and melt sodium acetate trihydrate and lithium chloride, then replenish 4g of water, after complete clarification, add polyacrylamide and stir to thicken, then add carbon nanotubes, after stirring evenly, take out the sample, wait for cooling and solidification Doing differential scanning calorimetry and T-t curves, it is determined that the latent heat of phase transition is 230kJ / kg, the phase transition temperature is 44°C, and the heat storage density (30-65°C) is 350kJ / kg, which can be used in small kitchen treasures and other fields .

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Abstract

The invention discloses a low-phase-transition-temperature heat storage material and a preparation method thereof. The low-phase-transition-temperature heat storage material comprises the following components in parts by weight: 55 to 93 parts of sodium acetate trihydrate, 1 to 40 parts of a temperature regulator, 2 to 6 parts of deionized water, 1 to 2 parts of a thickener, and 2 to 3 parts of a nucleating agent. The phase transition heat storage material provided by the invention has the adjustable phase transition temperature of 35 to 56 DEG C, and the phase transition latent heat of 200 to 280 kJ/kg. The application temperature range of a sodium acetate trihydrate system is expanded, and the phase transition heat storage material provided by the invention belongs to solid-liquid phase transition, has high heat storage density and can be effectively applied to the field of civil life.

Description

technical field [0001] The invention relates to the technical field of phase change materials, in particular to a low phase change temperature heat storage material and a preparation method. Background technique [0002] Phase change materials mainly use their rapid release or absorption of energy during the solid-solid and solid-liquid changes to achieve the purpose of regulating the temperature change of the external system. With the continuous progress of society, people have high requirements for life taste and convenience. If phase change materials are applied to people's daily life, it can not only improve the quality of life and efficiency, but also make efficient use of energy and realize It is a benefit. [0003] Phase change materials have great application space in the field of temperature regulation in life, especially in the fields of temperature regulation water cups and kitchen treasures. Among the phase change materials that have been actually used in such ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 孙梦寒柯昌申雁鸣刘小晋李明广田波李春旭
Owner 贺迈新能源科技(上海)有限公司
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