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Efficient composite phase change material and preparation method thereof

A composite phase change material and high-efficiency technology, which is applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of non-adjustable phase change temperature and long time required, and achieve adjustable phase change temperature, improved effect, and improved performance. obvious effect

Inactive Publication Date: 2018-09-14
曹斌斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, the above phase change materials still have problems such as long energy conduction time and non-adjustable phase change temperature.

Method used

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Examples

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preparation example Construction

[0024] Composite phase change material of the present invention and preparation method thereof, comprises the following steps:

[0025] A. Add 40-60 grams of inorganic salt particles to 100 grams of water, and mix evenly at a stirring rate of 450 rpm to 1000 rpm in the range of 70 ° C to 80 ° C to obtain a heat medium, that is, an aqueous solution of inorganic salts;

[0026] B. Add 0.5-3 grams of nucleating agent to the aqueous inorganic salt solution prepared in step A, and mix uniformly at a stirring rate of 450rpm-1000rpm in the range of 70°C-80°C to prepare a solution;

[0027] C. Add 3-7 grams of thickener, 1-15 grams of high-efficiency energy-conducting agent, and 0.1-10 grams of melting point regulator to the solution prepared in step B, and stir at 3000rpm-8000rpm in the range of 70°C-80°C Mix evenly at a high rate to prepare a high-efficiency composite phase change material.

[0028] The high-efficiency composite phase change material is composed of heat medium, nuc...

Embodiment 1

[0033] Step 1. Take 50 grams of anhydrous calcium chloride and 100 grams of water into a constant temperature stirring reactor, heat to 70° C. at a stirring rate of 500 rpm, and stir at a constant temperature for 30 minutes to obtain a solution;

[0034] Step 2. Add 1.5 grams of strontium chloride hexahydrate to the solution in step 1, and keep stirring at a constant temperature for 15 minutes at a stirring rate of 500 rpm and a temperature of 70° C.;

[0035] Step 3. Add 1.5 grams of polyacrylamide to the solution in step 2, then add 5.5 grams of attapulgite, and continue stirring at a constant temperature for 30 minutes at a stirring rate of 3000 rpm and a temperature of 70 ° C;

[0036] Step 4. Add 0.1 g of ammonium chloride to the solution in step 3, and keep stirring at a constant temperature for 5 minutes at a stirring rate of 3000 rpm and a temperature of 70° C.

[0037]Step 5. Add 1 gram of graphene to the solution in step 4, and continue stirring at a constant tempera...

Embodiment 2

[0040] Step 1. Take 49 grams of disodium hydrogen phosphate-free and 100 grams of water into a constant temperature stirring reactor, stir and mix at a stirring rate of 450 rpm, heat to 80 ° C, and stir at a constant temperature for 30 minutes to obtain an aqueous solution;

[0041] Step 2. Add 2 grams of sodium tetraborate decahydrate to the solution in step 1, and keep stirring at a constant temperature for 15 minutes at a stirring rate of 450 rpm and a temperature of 80°C;

[0042] Step 3. Add 1.5 grams of polyacrylamide to the solution in step 2, then add 5 grams of diatomaceous earth, and continue stirring at a constant temperature for 30 minutes at a stirring rate of 3000 rpm and a temperature of 80 ° C;

[0043] Step 4. Add 0.1 g of ammonium chloride to the solution in step 3, and keep stirring at a constant temperature for 5 minutes at a stirring rate of 450 rpm and a temperature of 80° C.;

[0044] Step 5. Add 5 grams of graphite to the solution in step 4, and continu...

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Abstract

The invention discloses an efficient composite phase change material and a preparation method thereof. The efficient composite phase change material is composed of 96.5%-75% of a thermal medium; 0.5%-3% of a nucleating agent; 3%-7% of a thickener; 1-15% of a high-efficiency conducting agent; and 0.1%-10% of a melting point regulator. The thermal medium is prepared by mixing one or more aqueous solutions of inorganic salts sodium sulfate, sodium carbonate, calcium chloride, lithium bromide and the like. The nucleating agent is any one of strontium chloride hexahydrate, potassium chloride, sodium tetraborate decahydrate, barium sulfate, or calcium fluoride. The thickener is any one or a mixture of several of the following substances in arbitrary proportion: diatomite, attapulgite, polyacrylamide and carboxymethylcellulose. The high-efficiency conducting agent is: (a) metal filler, (b) carbon filler, or (c) ceramic filler. The melting point regulator is any one of ammonium chloride, ammonium sulfate or ammonium nitrate. The efficient composite phase change material provided by the invention can rapidly play a conduction role in 60s to 180s, and the supercooling degree is 1.5DEG C.

Description

Technical field: [0001] The invention relates to the field of phase change materials, in particular to a high-efficiency composite phase change material and a preparation method thereof. Background technique: [0002] With energy saving and environmental protection being paid more and more attention by various countries. Due to the increasing gap between energy supply and demand, there is inconsistency in many energy utilization systems (such as solar energy, wind energy, carbon energy, etc.), resulting in irrational energy utilization and a lot of waste. People's understanding and research on heat storage materials, especially phase change heat storage materials, is something that happened in recent decades. As the basis of energy storage technology, phase change energy storage materials have been greatly developed at home and abroad. On the basis of summarizing the basic theory and research status of phase change energy storage materials, taking inorganic phase change ma...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 曹斌斌李维治
Owner 曹斌斌
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