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Coated hydrous salt heat-storage material and preparation method

A heat storage material and hydrated salt technology, applied in the direction of heat exchange materials, chemical instruments and methods, can solve the problems of corrosion and liquid leakage, and achieve high phase change enthalpy, avoid liquid leakage, phase reversible effect

Inactive Publication Date: 2017-09-29
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above-mentioned patent documents have made certain contributions to solving the problems of phase separation and supercooling, but they have not covered the hidden problems such as corrosion and liquid leakage during use.

Method used

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  • Coated hydrous salt heat-storage material and preparation method
  • Coated hydrous salt heat-storage material and preparation method
  • Coated hydrous salt heat-storage material and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0042] 1) At room temperature, weigh 22.2g of anhydrous calcium chloride and dissolve in 21.6g of water to form a clear and transparent calcium chloride solution, then weigh 0.9g of nucleating agent borax and 0.15g of thickener hydroxyethyl cellulose Add the element into the calcium chloride solution and stir evenly at 50°C to form a phase change mother solution;

[0043] 2) Weigh 5.0 g of porous material expanded graphite, add it to the phase change mother liquor in step 1), stir it evenly, put it in an environment of 5° C. to cool down and crystallize;

[0044] 3) Weigh 1.5g of methyl methacrylate, 0.5g of urethane acrylate and 0.1g of α, α-diethoxyacetophenone to make a photocurable resin solution, put it in a sprayer, and take out step 2 ) crystallized composite material, after spraying evenly with a sprayer, quickly put it under an ultraviolet lamp to illuminate, and after curing, a coated calcium chloride hexahydrate composite phase change heat storage material is obtain...

Embodiment 2

[0048] 1) At room temperature, weigh 35.7g of anhydrous calcium chloride and dissolve it in 34.8g of water to form a clear and transparent calcium chloride solution, then weigh 25g of magnesium chloride hexahydrate solid and add it to the calcium chloride solution. The homogenizer is 5000r / min homogenization for 2 minutes, finally weigh and add 6.1g nucleating agent strontium chloride hexahydrate, 1.0g strontium carbonate and 0.4g thickening agent hydroxyethyl cellulose, continue homogenization for 2 minutes at a speed of 5000r / min , forming a phase change mother liquor;

[0049] 2) Weigh 4.5g of expanded perlite, a porous material, and add it to the phase-change mother liquor in step 1), stir it evenly, and put it in an environment of 5°C to cool down and crystallize;

[0050] 3) Take by weighing 4.5g of n-butyl acrylate, 1.5g of polyurethane and 0.3g of α-hydroxyalkyl phenone, make it into photocurable resin solution, put it in a sprayer, take out step 2) after crystallizat...

Embodiment 3

[0055] 1) At room temperature, weigh 11.1g of anhydrous magnesium nitrate and dissolve it in 8.1g of water to form a clear and transparent magnesium nitrate solution, then weigh 19.2g of magnesium chloride hexahydrate solid and add it to the magnesium nitrate solution, homogenizer 3000r / min Homogenize for 5 minutes, finally weigh and add 0.8g of nucleating agent barium hydroxide, 0.5g of strontium carbonate and 0.2g of thickener carboxymethyl cellulose, and continue homogenizing for 5 minutes at a speed of 3000r / min to form a phase change mother liquor ;

[0056] 2) Weigh 4.4g of diatomite, a porous material, and add it to the phase change mother liquor in step 1), stir it evenly, and put it into room temperature to crystallize;

[0057] 3) Weigh 3.5g of n-butyl methacrylate, 1.0g of polyurethane methacrylate and 0.25g of 2,4-dihydroxybenzophenone to prepare a photocurable resin solution and put it in a sprayer. Take out the crystallized composite material in step 2), spray i...

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Abstract

The invention discloses a coated hydrous salt heat-storage material and a preparation method. The coated hydrous salt heat-storage material is composed of an inner core material and an outer wall material. The preparation method comprises the following steps of: firstly, dissolving inorganic salt, a nucleating agent and a thickener in water to obtain a mixed solution; mixing a porous adsorption material with the mixed solution and uniformly mixing the mixture to obtain a composite material; crystallizing the composite material to prepare a compound phase change material; preparing a photocured resin solution by a resin monomer and a prepolymer; and spraying the photocured resin to the composite phase change material, and lighting the material under an UV lamp after uniform spraying to obtain the coated hydrous salt heat-storage material. The heat storage material prepared by the method has the advantages of non-phase separation, no toxicity and corrosion, small degree of supercooling, no liquid leakage and the like. Meanwhile, the heat storage material has the advantage of great heat conductivity coefficient of a carbon material, and the heat storage performance and the heat stable performance are good.

Description

technical field [0001] The invention relates to a phase-change heat storage material, in particular to a non-toxic, non-corrosive, non-supercooled, phase-separated, and liquid-leakage coated hydrated salt heat storage material and a preparation method. Background technique [0002] With the continuous consumption of primary energy, the energy crisis has become a major problem that the world needs to face. While actively exploring the development and utilization of new energy sources, how to improve energy utilization efficiency has become equally important. As the most common member of the energy industry, thermal energy can be stored and used efficiently, which plays a non-negligible role in improving energy utilization efficiency, and thermal storage technology has emerged as the times require. Heat storage technologies are divided into three categories: sensible heat storage, phase change heat storage, and chemical reaction heat storage. Among them, phase change heat st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 张正国方晓明苑坤杰
Owner SOUTH CHINA UNIV OF TECH
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