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Phase change energy storage aggregate cement based composite material and preparation process thereof

A composite material and phase change energy storage technology, which is applied in the field of building materials, can solve the problems of easy leakage of phase change materials, low content of phase change materials, and low thermal conductivity, and achieve good energy storage temperature adjustment effect and energy storage density. High, high thermal conductivity effect

Active Publication Date: 2016-05-25
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of the above technology is that the dosage of phase change material is low, the energy storage density is low, and the phase change material is easy to leak when the phase change occurs, and the thermal conductivity is low, which limits its application.

Method used

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  • Phase change energy storage aggregate cement based composite material and preparation process thereof
  • Phase change energy storage aggregate cement based composite material and preparation process thereof
  • Phase change energy storage aggregate cement based composite material and preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1-6

[0035] 1) Heat the phase change material and expanded graphite separately above the phase change temperature (preferably 20-40°C above the phase change temperature), then mix evenly, and then heat the mixture above the phase change temperature (preferably 20-40°C above the phase change temperature) 40°C) for 25-35 minutes, then cooled to room temperature to obtain a composite phase change energy storage aggregate. The components and dosage of each raw material are shown in Table 1.

[0036] Table 1 Preparation parameters of composite phase change energy storage aggregates

[0037]

[0038]

[0039] Wherein, "proportion of expanded graphite" refers to the percentage of expanded graphite in the total mass of the composite phase change energy storage aggregate.

[0040] 2) Immerse the composite phase change energy storage aggregate in the pore-forming agent to saturation, and obtain the pretreated composite phase change energy storage aggregate after taking it out;

[0041] ...

Embodiment 7

[0047] The cement is preferably ordinary Portland cement with a strength grade not lower than 42.5, and the ordinary aggregate is river sand. The phase change energy storage aggregate is the phase change energy storage aggregate labeled a. The stabilizer is calcium lauryl sulfate. The pore forming agent is hydrogen peroxide with a concentration of 50wt%. Cement: common aggregate: phase change energy storage aggregate: stabilizer: pore former: water = 20:50:10:20:2:2:16. The compressive strength of the phase-change energy storage aggregate cement-based composite material is 8.8MPa, the thermal conductivity is 0.08W / m·k, and the temperature difference is 7.2°C. The rest are the same as in Example 1.

Embodiment 8

[0049] The cement is preferably ordinary Portland cement with a strength grade not lower than 42.5, and the ordinary aggregate is river sand. The phase change energy storage aggregate is the phase change energy storage aggregate marked c. The stabilizer is calcium lauryl sulfate. The pore forming agent is hydrogen peroxide with a concentration of 30wt%. Cement: common aggregate: phase change energy storage aggregate: stabilizer: pore former: water = 20:50:10:20:2:3:15. The compressive strength of the phase-change energy storage aggregate cement-based composite material is 8.5MPa, the thermal conductivity is 0.07W / m·k, and the temperature difference is 8.1°C. The rest are the same as in Example 1.

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Abstract

The invention discloses a phase change energy storage aggregate cement based composite material and preparation process and a preparation process thereof, which are used for solving the problems that an existing phase change energy storage composite material for a building purpose is low in mixing amount of a phase change material and low in energy storage density, and the phase change material is easily leaked during phase change, has relatively low heat conduction coefficient and the like. The composite material disclosed by the invention is prepared from 20 to 30 parts of cement, 30 to 50 parts of common aggregate, 5 to 20 parts of composite phase change energy storage aggregate, 1 to 2 parts of stabilizer, 1 to 3 parts of pore forming agent and 15 to 22 parts of water, wherein the composite phase change energy storage aggregate is prepared from a phase change material and expanded graphite. The phase change energy storage aggregate cement based composite material is simple in process, low in cost, high in energy storage density, high in heat conduction coefficient, and is especially suitable for the building field, and the phase change material is unlikely to leak.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a phase-change energy storage aggregate cement-based composite material and a preparation process thereof. Background technique [0002] Phase change energy storage mainly stores energy through phase change energy storage materials that change the phase state of matter within a specific temperature or temperature range, and absorb or release a large amount of latent heat of phase change along with the phase change process. Phase change energy storage technology is an important technology to improve energy utilization efficiency and protect the environment. It has broad application prospects in the fields of solar thermal utilization, peak shifting of electric power, recovery of industrial waste heat, and civil and military applications. By adding phase change materials to common building materials, phase change energy storage building materials with higher heat capacit...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B38/02
CPCC04B28/04C04B2201/32C04B2201/50C04B14/068C04B14/024C04B2103/0071C04B24/16C04B22/068C04B38/02
Inventor 张运华袁颂东闵捷姚丽萍周梦雪郑智勇张竹柳王杰邹京来
Owner HUBEI UNIV OF TECH
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