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-28 DEG C phase change coolant and preparation method thereof

A phase-change cool storage agent and potassium chloride technology, which is applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of large subcooling degree of cool storage material, excessive temperature of cool storage agent, and large volume of refrigerated trucks. Solve the effects of low refrigeration efficiency, long service life and fast heat conduction

Inactive Publication Date: 2020-02-25
上海直帆冷链技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large volume of refrigerated trucks, there is a huge waste of resources in transporting small batches of frozen goods, and a low-temperature phase-change cold storage agent is needed to transport goods
[0003] The existing low-temperature phase-change cold storage materials on the market have a large supercooling degree. In order to solve the problem of excessive temperature of the cold storage agent, the present invention discloses a cold storage material composition with a crystallization temperature of -28°C. The crystallization temperature of the cold storage agent is between -30°C and -26°C, the cold storage agent is safe, non-toxic, low in price, and easy to make

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Prepare raw materials according to the following mass percentages: 10% potassium chloride, 8% sodium chloride, 7% ammonium chloride, 0.5% sodium carboxymethyl cellulose, 0.4% nanoscale metal material composite, and the rest is deionized water ;

[0030] Preparation:

[0031] (1) take deionized water with container;

[0032] (2) Stir continuously at 1000r / min, first add nanoscale metal material composite A, continue to add potassium chloride, sodium chloride, ammonium chloride in sequence, and fully dissolve;

[0033] (3) Set the rotating speed to 3500r / min, add sodium carboxymethyl cellulose, continue stirring to fully swell the sodium carboxymethyl cellulose, and keep stirring for 1 hour to obtain a phase-change cold storage liquid. According to the step-cooling curve method, the crystallization temperature of the phase-change cold storage liquid is -28.7°C, and the latent heat of fusion is 248kJ / kg.

Embodiment 2

[0035] Prepare raw materials according to the following mass percentages: 12% potassium chloride, 7% sodium chloride, 9% ammonium chloride, 0.4% sodium carboxymethyl cellulose, 0.35% nanoscale metal material composite, and the rest is deionized water ;

[0036] Preparation:

[0037] (1) take deionized water with container;

[0038] (2) Stir continuously at 1000r / min, first add nanoscale metal material composite A, continue to add potassium chloride, sodium chloride, ammonium chloride in sequence, and fully dissolve;

[0039] (3) Set the rotating speed to 3500r / min, add sodium carboxymethyl cellulose, continue stirring to fully swell the sodium carboxymethyl cellulose, and keep stirring for 1 hour to obtain a phase-change cold storage liquid. According to the step-cooling curve method, the crystallization temperature of the phase-change cold storage liquid is -29.2°C, and the latent heat of fusion is 245kJ / kg.

Embodiment 3

[0041] Prepare raw materials according to the following mass percentages: 18% potassium chloride, 6% sodium chloride, 12% ammonium chloride, 0.7% sodium carboxymethyl cellulose, 0.7% nanoscale metal material composite, and the rest is deionized water ;

[0042] Preparation:

[0043] (1) take deionized water with container;

[0044] (2) Stir continuously at 1000r / min, first add nanoscale metal material composite A, continue to add potassium chloride, sodium chloride, ammonium chloride in sequence, and fully dissolve;

[0045] (3) Set the rotating speed to 3500r / min, add sodium carboxymethyl cellulose, continue stirring to fully swell the sodium carboxymethyl cellulose, and keep stirring for 1 hour to obtain a phase-change cold storage liquid. The crystallization temperature of the phase change cold storage liquid is -29.5°C and the latent heat of fusion is 240kJ / kg as tested by the step cooling curve method.

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Abstract

The invention discloses a -28 DEG C phase change coolant and a preparation method thereof. The -28 DEG C phase change coolant comprises, by mass, 10-15% of potassium chloride, 5-10% of sodium chloride, 8-15% of ammonium chloride, 0.2-1% of sodium carboxymethyl cellulose, 0.1-1.5% of a nanoscale metal material compound A, and the balance of deionized water. The crystallization temperature of the -28 DEG C phase change coolant is -30 to-26 DEG C, the phase change latent heat can reach 230 kJ / kg, and the phase change coolant is safe, nontoxic and cheap, and can be used as a refrigerant to meet the freezing requirements of frozen medicines, meat and seafood.

Description

technical field [0001] The invention relates to a -28°C phase-change cold storage agent, the crystallization temperature of which is between -30°C and -26°C. The -28°C phase-change cold storage material obtained according to the invention can be used in the fields of low-temperature storage and transportation of various frozen foods and frozen medicines. Background technique [0002] With the development of the express delivery industry and the improvement of residents' living standards, a large number of ice cream and frozen seafood products have entered thousands of households. Pharmaceutical production, wholesale, distribution enterprises and centers for disease control transport freeze-dried drugs, which need to be transported at low temperature. Due to the large volume of refrigerated trucks, there is a great waste of resources in transporting small batches of refrigerated goods, and a low-temperature phase-change cold storage agent is needed to transport goods. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/066
Inventor 宋汝祥刘小辉
Owner 上海直帆冷链技术有限公司
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