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A Novel Enhanced Composite Phase Change Fluid and Its Preparation Method and Application

A composite phase change and fluid technology, applied in chemical instruments and methods, thermal storage equipment, chemical industry, etc., can solve the problem of large particle size variation of phase change materials, low thermal conductivity of organic phase change materials, and short life of phase change materials and other problems, to achieve good mechanical properties, reduce flammability and liquid fluidity, and prolong life

Active Publication Date: 2021-03-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, phase change materials are prone to a series of problems such as leakage and environmental pollution during use, and when phase change materials are used alone, due to the influence of the environment, the particle size of phase change materials changes greatly, and their performance deteriorates. The material conducts heat less efficiently, resulting in a shorter lifetime of the phase change material

Method used

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  • A Novel Enhanced Composite Phase Change Fluid and Its Preparation Method and Application
  • A Novel Enhanced Composite Phase Change Fluid and Its Preparation Method and Application
  • A Novel Enhanced Composite Phase Change Fluid and Its Preparation Method and Application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The preparation of a new type of enhanced composite phase change fluid in this example can be used in direct contact cold storage, and the raw material formula is shown in Table 1.

[0050] Table 1 Embodiment 1 raw material formula

[0051]

[0052] (1) Preheat all the raw materials (deionized water, phase change material, emulsifier and nucleating agent) for preparing the core phase change material to 75°C.

[0053] (2) Mix the preheated phase change materials such as myristyl palmitate and other esters, and stir with a stirrer at a low speed for 15 minutes to prepare the dispersed phase to obtain the first solution; then mix the preheated emulsifier with the synthetic Nucleating agents such as steareth-10, steareth-30, steareth-40, steareth-50, steareth-100, steareth-20 , steareth-2, polyvinyl alcohol, oleyl polyoxyethylene ether, magnesium stearate, glycerin, etc. were added to deionized water, and 0.2 g of nano-sized aluminum nitride and 0.2 g of molybdenum disu...

Embodiment 2

[0060] The preparation of a new type of enhanced composite phase change fluid in this example can be used for solar photovoltaic photothermal panels, and the raw material formula is shown in Table 2.

[0061] Table 2 embodiment 2 raw material formula

[0062]

[0063] (1) Preheat all the raw materials (deionized water, phase change material, emulsifier and nucleating agent, etc.) for preparing the core phase change material to 75°C.

[0064] (2) Mix the preheated phase change materials such as tridecyl pentadecyl esters, and stir with a stirrer at low speed for 15 minutes to prepare the dispersed phase to obtain the first solution; then mix the preheated emulsifier with the synthetic Add nucleating agents such as nonoxynol, polyoxyethylene lauryl ether, ceteth-12, polyvinylcyclobutane, magnesium stearate, and glycerin to deionized water, and add 0.4 g of nano-scale nitrogen aluminum oxide and 0.4 g of molybdenum disulfide. Keep the temperature and keep stirring until the ...

Embodiment 3

[0071] The preparation of a new type of enhanced composite phase change fluid in this example can be used in the circulating cooling system of the diverter valve, and the raw material formula is shown in Table 3.

[0072] Table 3 embodiment 3 raw material formula

[0073]

[0074]

[0075] (1) Preheat all the raw materials (deionized water, phase change material, emulsifier and nucleating agent, etc.) for preparing the core phase change material to 75°C.

[0076] (2) Mix the preheated phase change materials such as tridecyl heptadecanoate and other ester acids, and stir with a stirrer at a low speed for 15 minutes to prepare the dispersed phase to obtain the first solution; then mix the preheated emulsifier With nucleating agents such as lauryl heptaglycol ether, cetyl 1,3 propylene glycol ether, oleth-8, polyvinyl-2-methylcyclohexane, poly-3-methyl - 1-butene, polycyclopentene and glycerol were added to deionized water, and 1 g of nano-scale aluminum nitride and 1 g of...

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Abstract

The invention belongs to the technical field of phase change materials, and particularly discloses a preparation method and application of a novel reinforced composite phase change fluid. The preparation method comprises the following steps that a fluid phase change material and a water-soluble melamine prepolymer is firstly synthesized, then the obtained water-soluble melamine prepolymer is mixedwith a fatty acid ester water-based emulsion, an emulsification reaction is carried out, a reinforced composite heat transfer microcapsule is obtained; and then the obtained reinforced composite heattransfer microcapsule is uniformly mixed with the obtained fluid phase change material, and the novel reinforced composite phase change fluid is obtained. According to the novel reinforced compositephase change fluid, due to the addition of the reinforced composite heat transfer microcapsule, the change of a particle size in the use process of the phase change fluid is greatly reduced, and a reinforced heat transfer agent is added on the basis, so that the heat transfer efficiency of the original phase change material is greatly improved, the service life is further prolonged to a certain extent; and in addition, the phase change fluid further has the advantages of high latent heat of phase change, flexible and controllable phase change temperature range, good stability and the like.

Description

technical field [0001] The invention belongs to the technical field of phase change materials, and in particular relates to a novel reinforced composite phase change fluid and its preparation method and application. Background technique [0002] Phase change materials (phase change materials, PCMs) refer to materials that can change their physical state (solid-liquid, liquid-gas, solid-gas, solid-solid, etc.) under certain conditions, depending on the temperature difference between the environment and the system, or Light, electric field, magnetic field, chemical energy, etc. are used as the driving force to realize the absorption and release of heat energy, or the function of shape memory recovery, recording, etc., and during the phase transition process, the chemical properties of the material remain unchanged, and the temperature can change slightly . As an energy storage phase change material, the main conditions that it should meet are: suitable phase transition temper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D20/00C08G12/32C09K5/06
CPCC08G12/32C09K5/063F28D20/0034Y02E60/14Y02P20/10
Inventor 胡剑峰苏皓瞿金清
Owner SOUTH CHINA UNIV OF TECH
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