Building phase-change heat storage composite material used as light aggregate

A phase change heat storage and composite material technology, which is applied in the field of phase change heat storage material preparation, can solve the problems of easy leakage, difficult cement base, and poor packaging, and achieves easy leakage, small porosity, and difficulty in The effect of leakage

Inactive Publication Date: 2016-06-01
SOUTHEAST UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] Technical problems: In view of the current phase change energy storage technology, it is easy to leak, the package is not dense, the room temperature is unstable, it is difficult to store it for a long time at room temperature, it has strong hydrophobicity, and it is difficult to be compatible with the cement base; the molding process is easy to float and uneven. And other issues

Method used

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  • Building phase-change heat storage composite material used as light aggregate
  • Building phase-change heat storage composite material used as light aggregate
  • Building phase-change heat storage composite material used as light aggregate

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Experimental program
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Embodiment

[0026] The phase change material is made of liquid paraffin at 5°C and sliced ​​paraffin at 58-60°C in a ratio of 1:2 to prepare a phase change material with a melting point of 28°C and a latent heat of phase change of 218J / g.

[0027] The encapsulation material adopts P·II42.5R cement and Class I fly ash mixed in proportions of 80% and 20% as the cementing material, and the ratio of water and encapsulation material is 0.15-0.25.

[0028] Adsorbent materials Group 1 used vitrified microbeads, Groups 2 and 3 used sepiolite, and Groups 4, 5 and 6 used waste EPS.

[0029] After 4 hours of molding, put it in an environment with a temperature of 20°C and a relative humidity greater than 90% for 7 days, and then put it in a steam curing room at 40°C for 24 hours. The measured results are shown in Table 1. The products are as follows: figure 1 shown.

[0030] Table 1 The ratio and performance of different phase change materials, adsorption materials, and packaging materials

[0031...

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Abstract

The invention discloses a building phase-change heat storage material used as light aggregate, which solves the problems of difficulty in storage, high leakage tendency in use, and difficulty in actual construction in the phase-change material which is used in building materials at present. The phase-change heat storage material serving as an aggregate has adjustable phase-change temperature points. The particle diameter is 1.6-20mm, the phase-change latent heat is 10-100 J/g, the cylindrical compressive strength is 2.5-10.0 MPa, and the 80-DEG C cold/heat circulation loss rate is almost zero. The heat storage material is applicable to mortar, concrete or masonry structures with requirements for the heat storage function. The building phase-change heat storage composite material is composed of an adsorbing material, a phase-change material and a packaging material. The adsorbing material adsorbs a certain proportion of the phase-change material with the phase-change temperature of 15-32 DEG C, and then is packaged by the packaging material. The building phase-change heat storage composite material has the advantages of favorable sealability, controllable phase-change temperature and higher strength, and can solve the problems of difficulty in storage, low stability, poor formability and the like in the existing phase-change material.

Description

technical field [0001] The invention belongs to the field of building materials, and belongs to phase-change energy storage materials, which can be used as aggregates of concrete, mortar or masonry, and can also be used as thermal insulation and heat storage materials in structures that require thermal insulation and heat storage, such as external walls and floors. A preparation method of a phase-change heat storage material that can be widely used in building structures. Background technique [0002] Phase change heat storage composite material is a kind of thermal functional composite material, which can store energy in the form of phase change latent heat in its body. It can be used in building materials and can effectively improve the heat storage capacity of buildings. There are currently two main methods for phase change materials used in building materials: (1) Direct immersion method, that is, directly melted phase change materials are infiltrated into porous materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/12C09K5/06
CPCC04B20/12C09K5/063C04B20/1077C04B20/1025C04B20/0016Y02E60/14
Inventor 庞超明王少华孙友康徐剑张继文
Owner SOUTHEAST UNIV
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