Shape-stabilized phase change energy storage material for building and preparation method thereof

A phase-change energy storage material and energy storage material technology, applied in the field of shaped phase-change energy storage materials for buildings and their preparation, can solve the problems of poor adsorption stability of shaped phase-change materials, lack of thermal conductivity of materials, and low preparation costs. Achieve the effects of good plasticity, good practicability and good thermal conductivity

Inactive Publication Date: 2012-05-02
NANJING UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the comparison of the above processes, the preparation process of the physical adsorption method is simple, the preparation cost is low, and it is suitable for the preparation of fixed phase change energy storage materials for buildings. At present, more physical adsorption methods use expanded perlite, exp

Method used

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  • Shape-stabilized phase change energy storage material for building and preparation method thereof
  • Shape-stabilized phase change energy storage material for building and preparation method thereof
  • Shape-stabilized phase change energy storage material for building and preparation method thereof

Examples

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Example Embodiment

[0017] Example 1

[0018] Use porous matrix fatty acid composite phase change energy storage material and ordinary building gypsum powder (specific surface area 412m 2 / kg), to prepare shaped phase change energy storage materials for construction. In this embodiment, the porous matrix is ​​activated carbon powder, the molar ratio of the mixed phase change material is lauric acid: capric acid=6:4, the phase transition temperature is 25.1℃, and the activated carbon powder (average particle size is 22μm) fatty acid composite phase change storage The energy material is made by adding activated carbon powder to the molten fatty acid at a temperature of 60°C, and fully mixing the activated carbon powder and the molten fatty acid to make the activated carbon powder fatty acid composite phase change energy storage material, and then the ordinary building gypsum powder It is mixed with composite phase change energy storage materials to prepare shaped fatty acid phase change energy storage...

Example Embodiment

[0019] Example 2

[0020] Using porous matrix fatty acid composite phase change energy storage material and high-strength gypsum powder (specific surface area of ​​460m 2 / kg), to prepare shaped phase change energy storage materials for construction. In this embodiment, the porous matrix is ​​activated carbon powder (average particle size 33μm), the molar ratio of the mixed phase change material is lauric acid: capric acid=5:5, the phase transition temperature is 21.8°C, and the activated carbon powder fatty acid composite phase change energy storage The material is made by adding activated carbon powder to the molten fatty acid at a temperature of 60°C, and mixing the activated carbon powder and the molten fatty acid thoroughly after fully stirring the activated carbon powder fatty acid composite phase change energy storage material, and then combining high-strength gypsum powder and The composite phase change energy storage material is mixed to prepare the shaped fatty acid pha...

Example Embodiment

[0021] Example 3

[0022] Using porous matrix fatty acid composite phase change energy storage material and dihydrate gypsum powder (specific surface area 370m 2 / kg), to prepare shaped phase change energy storage materials for construction. In this embodiment, the porous substrate is diatomaceous earth powder (average particle size 18μm), the molar ratio of the mixed phase change material is lauric acid: capric acid=6:4, the phase change temperature is 25.1℃, and the diatomaceous earth powder is compounded with fatty acids. The phase change energy storage material is made by adding diatomaceous earth powder to the molten fatty acid at a temperature of 80°C, and then fully mixing the diatomaceous earth powder and the molten fatty acid to make the diatomite powder and the molten fatty acid. Energy storage materials, and then mixing dihydrate gypsum powder and composite phase change energy storage materials to prepare shaped fatty acid phase change energy storage materials. The ma...

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Abstract

The invention relates to a shape-stabilized phase change energy storage material for building and a preparation method thereof. The material provided by the invention comprises components of: by weight, 70-85% of a composite phase change energy storage material with its melting point being 18-30 DEG C and 15-30% of gesso. The composite phase change energy storage material with its melting point being 18-30 DEG C is composed of a porous matrix and a mixed fatty acid phase change material, wherein the mass ratio of the porous matrix to the mixed fatty acid phase change material is 1:4-1:6. At the temperature of 60-80 DEG C, the porous matrix is added in the molten lauric acid-capric acid mixed fatty acid to prepare a composite phase change material. Then, gesso is mixed with the composite phase change material to prepare a shape-stabilized fatty acid phase change energy storage material with a more stable adsorption property. The prepared shape-stabilized phase change energy storage material has good thermal conductivity, good adsorption stability and good material plasticity, will not cause seepage at high temperature, is easy to mix with a building material, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of composite phase change energy storage materials, in particular to a shaped phase change energy storage material for buildings and a preparation method thereof. Background technique [0002] Phase change material (PCM) refers to the ability to change the phase state of a substance at a specific temperature or temperature range (phase change temperature), and absorb or release a large amount of latent heat of phase change along with the phase change process, and apply phase change materials to building materials , using the phase change latent heat of the phase change material to realize energy storage and utilization, which can achieve the purpose of reducing the energy consumption of the air conditioning system and improving the indoor thermal comfort. It is precisely because of this characteristic of phase change materials that phase change energy storage technology has become a hot research topic in the...

Claims

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Application Information

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IPC IPC(8): C04B28/14C09K5/06
Inventor 李东旭张毅纪前仁张菁燕
Owner NANJING UNIV OF TECH
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