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Organic phase-change energy storage material with inorganic matrix and preparation method of organic phase-change energy storage material with inorganic matrix

An energy storage material and organic phase technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of limiting the use range of phase change energy storage materials, affecting the heat storage capacity, and no phase separation, and achieving volume reduction. Small, no liquid leakage, the effect of solving liquid leakage

Inactive Publication Date: 2012-11-21
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most inorganic phase change energy storage materials are corrosive and have the disadvantages of supercooling and phase separation during the phase change process, which affects their heat storage capacity; while organic phase change energy storage materials are not only less corrosive, but also There is almost no disadvantage of phase separation in the process, and the chemical performance is stable and the price is cheap
Since phase-change energy storage materials become liquid when they melt and absorb heat, container packaging is required, which limits the scope of use of phase-change energy storage materials

Method used

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  • Organic phase-change energy storage material with inorganic matrix and preparation method of organic phase-change energy storage material with inorganic matrix

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First, mix hexadecanoic acid and octadecanoic acid in a mass ratio of 4:6, heat to a molten state, maintain the temperature at 80 °C, and stir at 800 r / min for 50-70 minutes to prepare a uniform organic phase change energy storage material Liquid eutectic mixture.

[0019] The liquid mixture was then mixed with activated alumina at a ratio of 1:3, stirred at 500 r / min for 120 minutes, and dried at 45 °C for 80 minutes to obtain a composite organic phase change energy storage material. It is determined that the solidification temperature of the composite phase change energy storage material is 66.5°C, the melting temperature is 69.1°C, the latent heat of solidification is 17.5kJ / kg, and the latent heat of fusion is 28.6kJ / kg.

[0020] The microstructure diagram of organic phase change energy storage materials with inorganic matrix is ​​shown in the attached figure 1 (a).

Embodiment 2

[0022] First, mix hexadecanoic acid and octadecanoic acid in a mass ratio of 5:5, heat it to a molten state, maintain the temperature at 80 °C, and stir at 800 r / min for 50-70 minutes to prepare a uniform organic phase change energy storage material Liquid eutectic mixture.

[0023] The liquid mixture was then mixed with activated alumina at a ratio of 1:2, stirred at 500 r / min for 120 minutes, and dried at 47 °C for 70 minutes to obtain a composite organic phase change energy storage material. It is determined that the solidification temperature of the composite phase change energy storage material is 63.2°C, the melting temperature is 66.8°C, the latent heat of solidification is 45.5kJ / kg, and the latent heat of fusion is 43.3kJ / kg.

[0024] The microstructure diagram of organic phase change energy storage materials with inorganic matrix is ​​shown in the attached figure 1 (b).

Embodiment 3

[0026] First, mix hexadecanoic acid and octadecanoic acid in a mass ratio of 6:4, heat to a molten state, maintain the temperature at 80 °C, and stir at 800 r / min for 50-70 minutes to prepare a uniform organic phase change energy storage material Liquid eutectic mixture.

[0027] The liquid mixture was then mixed with activated alumina at a ratio of 1:1, stirred at 500 r / min for 120 minutes, and dried at 50 °C for 60 minutes to obtain a composite organic phase change energy storage material. It was determined that the solidification temperature of the composite phase change energy storage material was 62.1 °C, the melting temperature was 64.8 °C, the latent heat of solidification was 85.51 kJ / kg, and the latent heat of fusion was 90.2 kJ / kg.

[0028] The microstructure diagram of organic phase change energy storage materials with inorganic matrix is ​​shown in the attached figure 1 (c).

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Abstract

The invention discloses an organic phase-change energy storage material with an inorganic matrix, which is characterized by being formed by mixing hexadecanoic acid, octadecanoic acid and active alumina, wherein the hexadecanoic acid is mixed with the octadecanoic acid on mass ratio of (4-6):(6-4); and the mixture is mixed with the active alumina on mass ratio of 1:(1-3). The invention also discloses a preparation method of the organic phase-change energy storage material with the inorganic matrix. With the adoption of the organic phase-change energy storage material with the inorganic matrix, the hexadecanoic acid and the octadecanoic acid are used as the phase-change energy storage materials, and the activated aluminium oxide is used as the inorganic matrix to play an encapsulation role, so that the organic phase-change energy storage material is prevented from effusing when being heated and molted.

Description

technical field [0001] The invention belongs to the field of composite phase-change energy storage materials, and in particular relates to an organic phase-change energy storage material with an inorganic matrix and a preparation method thereof. Background technique [0002] Phase change energy storage materials absorb heat from the environment during the phase change process, and release heat to the environment when needed, so as to achieve the purpose of controlling the temperature of the surrounding environment and saving energy. It has broad application prospects in building energy saving, solar energy utilization, heat recovery and other fields. [0003] A phase change energy storage material is a material that absorbs heat when it melts and releases heat when it condenses. At present, the commonly used phase change energy storage materials mainly include inorganic substances and organic substances. Most inorganic phase change energy storage materials are corrosive an...

Claims

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Application Information

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IPC IPC(8): C09K5/06
Inventor 方贵银曹磊单锋陈智李辉
Owner NANJING UNIV
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