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Air energy cold storage phase-change material and preparation method thereof

A technology of phase change materials and air energy, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve problems such as thermal conductivity and packaging leakage, and achieve high stability, simple preparation process, and easy production and packaging.

Inactive Publication Date: 2019-10-25
XIAN JIAOTONG UNIV CITY COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the shortcomings of the existing phase change materials in the application of air energy storage, the present invention aims to provide a phase change storage material and its preparation method, considering the phase change temperature, energy storage density, and layering of the phase change process of the phase change material problems, compatibility with heat exchangers, thermal conductivity of materials, packaging leakage and economy, etc., to develop an organic composite phase change material

Method used

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  • Air energy cold storage phase-change material and preparation method thereof
  • Air energy cold storage phase-change material and preparation method thereof
  • Air energy cold storage phase-change material and preparation method thereof

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Experimental program
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Embodiment 1

[0026] The steps of this embodiment include:

[0027] (1) Take by weighing capric acid, lauric acid, nano ferric oxide, sodium dodecylbenzenesulfonate and expanded graphite that quality is respectively 60g, 32g, 0.4g, 0.4g, 7.2g;

[0028] (2) Put the weighed capric acid and lauric acid reagents into a beaker, mix well, heat and melt the capric acid and lauric mixed materials with a constant temperature hot water bath at 65°C, and stir evenly with an electric constant temperature stirrer at the same time. for 30 minutes to obtain binary eutectic fatty acids;

[0029] (3) Pour the nanometer iron sesquioxide powder that weighs into the binary eutectic fatty acid that step (2) makes, stir under normal temperature;

[0030] (4) Sodium dodecylbenzenesulfonate (SDBS) is poured into the container of step (3), and stirred evenly at room temperature;

[0031] (5) Put the stirred solution in step (4) together with the container into an ultrasonic oscillator with a water bath temperatur...

Embodiment 2

[0037] The steps of this embodiment include:

[0038] (1) Take by weighing capric acid, lauric acid, nano ferric oxide, sodium dodecylbenzenesulfonate and expanded graphite that are respectively 60.5g, 32.5g, 0.7g, 0.2g, 6.1g;

[0039] (2) Put the weighed capric acid and lauric acid reagents into a beaker, mix well, heat and melt the capric acid and lauric mixed materials with a constant temperature hot water bath at 65°C, and stir evenly with an electric constant temperature stirrer at the same time. for 30 minutes to obtain binary eutectic fatty acids;

[0040] (3) Pour the nanometer iron sesquioxide powder that weighs into the binary eutectic fatty acid that step (2) makes, stir under normal temperature;

[0041] (4) Sodium dodecylbenzenesulfonate (SDBS) is poured into the container of step (3), and stirred evenly at room temperature;

[0042] (5) Put the stirred solution in step (4) together with the container into an ultrasonic oscillator with a water bath temperature o...

Embodiment 3

[0047] (1) Take by weighing capric acid, lauric acid, nano ferric oxide, sodium dodecylbenzenesulfonate and expanded graphite that quality is respectively 61g, 33g, 0.5g, 0.3g, 5.2g;

[0048] (2) Put the weighed capric acid and lauric acid reagents into a beaker, mix well, heat and melt the capric acid and lauric mixed materials with a constant temperature hot water bath at 65°C, and stir evenly with an electric constant temperature stirrer at the same time. for 30 minutes to obtain binary eutectic fatty acids;

[0049] (3) Pour the nanometer iron sesquioxide powder that weighs into the binary eutectic fatty acid that step (2) makes, stir under normal temperature;

[0050] (4) Sodium dodecylbenzenesulfonate (SDBS) is poured into the container of step (3), and stirred evenly at room temperature;

[0051] (5) Put the stirred solution in step (4) together with the container into an ultrasonic oscillator with a water bath temperature of 60°C and a power of 80W for 90 minutes;

[0...

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Abstract

The invention discloses an air energy cold storage phase-change material and a preparation method thereof. Decanoic acid, lauric acid, expanded graphite, nano ferric oxide and dodecylbenzene sulfonicacid are adopted as raw materials, a phase-change cold storage material is prepared through a series of processes such as mixing, co-melting, stirring, oscillation, dispersion, cooling and adsorption,the start melting temperature is 18+ / -1 DEG C, the phase-change peak temperature is 23+ / -2 DEG C, the phase-change enthalpy is 120-129kJ / kg, and the material has good toughness and strength and is good in stability. The phase-change material has a surface phase as a solid phase in the phase-change process, has no flowability and is free of leakage problem. The phase-change material is powder which is sealed in a container, and can also form an overall structure with a building material. The material is used in a region with large day and night temperature differences and is used for storing air cold energy at night in summer, and in case of a high indoor temperature, the cold energy can be released into a room, and thus an indoor air temperature can be adjusted.

Description

technical field [0001] The invention relates to the technical field of preparation of phase change materials, in particular to an air energy cold storage phase change material and a preparation method thereof. Background technique [0002] Phase change energy storage uses phase change materials to store and release cold and heat during the phase change process to realize energy transfer in space and time, which provides conditions for the application of natural energy in buildings, effectively alleviates indoor temperature fluctuations, and reduces air conditioning or floor heating. Load, "shifting peaks and filling valleys", energy saving and environmental protection have broad application prospects. [0003] In recent years, with the development of our country, the energy consumption of buildings has gradually increased, accounting for about 30% of the total energy consumption of the society, of which the energy consumption of air-conditioning systems accounts for about 50...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/066Y02E60/14
Inventor 张润霞
Owner XIAN JIAOTONG UNIV CITY COLLEGE
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