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Low-temperature composite phase change cold storage agent and preparation method thereof

A composite phase change and cold storage agent technology, applied in the direction of chemical instruments and methods, heat exchange materials, etc., can solve the problems that it is difficult to meet the requirements of cold storage and the performance requirements of cold storage agent, and achieve large phase change latent heat, The preparation process is simple and feasible, and the effect of the preparation process is simple

Inactive Publication Date: 2014-12-24
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a single material cannot well meet the performance requirements of the cold storage agent. If the inorganic salt solution and the aqueous alcohol solution can be mixed, and the advantages of the two can be combined to reduce the influence of their respective shortcomings, a composite phase with superior performance can be obtained. variable cold storage material
At present, there are many low-temperature composite phase change materials in use at home and abroad, but the phase transition temperature of most of the formulations is above -20°C, and can only provide a storage and transportation environment of about -10°C to -15°C. -15°C food, chemical products, biological drugs, etc. are difficult to meet the refrigeration requirements

Method used

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  • Low-temperature composite phase change cold storage agent and preparation method thereof
  • Low-temperature composite phase change cold storage agent and preparation method thereof
  • Low-temperature composite phase change cold storage agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] In this embodiment, a low-temperature composite phase-change cool storage agent is composed of the following component ratios according to the mass percentage:

[0026] Sodium Chloride 15%,

[0027] Glycerol 12.5%,

[0028] Water 72.5%.

[0029] Wherein, the above-mentioned water can be selected pure water or distilled water.

[0030] The preparation method of the low-temperature composite phase change cold storage agent comprises the following steps:

[0031] S1. prepare 20% sodium chloride solution according to the mass percentage: pour pure water or distilled water into the stirring container, add sodium chloride, fully stir to make sodium chloride dissolve, and obtain 20% sodium chloride solution;

[0032] S2. Prepare a 50% glycerol solution according to the mass percentage: pour pure water or distilled water into the stirring container, add glycerol, and stir to obtain a 50% glycerol solution;

[0033] S3. Pour the sodium chloride solution and glycerol solution...

Embodiment 2

[0036] In this embodiment, a low-temperature composite phase-change cool storage agent is composed of the following component ratios according to the mass percentage:

[0037] Sodium Chloride 15.75%,

[0038] Glycerol 12.5%,

[0039] Water 71.75%.

[0040] Wherein, the above-mentioned water can be selected pure water or distilled water.

[0041] The preparation method of the low-temperature composite phase change cold storage agent comprises the following steps:

[0042] S1. prepare 21% sodium chloride solution according to the mass percentage: pour pure water or distilled water into the stirring container, add sodium chloride, fully stir to make sodium chloride dissolve, and obtain 21% sodium chloride solution;

[0043] S2. Prepare a 50% glycerol solution according to the mass percentage: pour pure water or distilled water into the stirring container, add glycerol, and stir to obtain a 50% glycerol solution;

[0044] S3. Pour the sodium chloride solution and glycerol solu...

Embodiment 3

[0047] In this embodiment, a low-temperature composite phase-change cool storage agent is composed of the following component ratios according to the mass percentage:

[0048] Sodium Chloride 16.5%,

[0049] Glycerol 12.5%,

[0050] Water 71%.

[0051] Wherein, the above-mentioned water can be selected pure water or distilled water.

[0052] The preparation method of the low-temperature composite phase change cold storage agent comprises the following steps:

[0053] S1. prepare 22% sodium chloride solution according to the mass percentage: pour pure water or distilled water into the stirring container, add sodium chloride, fully stir to make sodium chloride dissolve, and obtain 22% sodium chloride solution;

[0054] S2. Prepare a 50% glycerol solution according to the mass percentage: pour pure water or distilled water into the stirring container, add glycerol, and stir to obtain a 50% glycerol solution;

[0055] S3. Pour the sodium chloride solution and glycerol solution...

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Abstract

The invention discloses low-temperature composite phase change cold storage agent and a preparation method thereof. The low-temperature composite phase change cold storage agent is composed of 15-16.5% of sodium chloride, 12.5% of glycerol and rest of water by weight. The preparation method for the low-temperature composite phase change cold storage agent includes steps that S1, preparing 20-22% of sodium chloride solution according to the mass percent; S2, preparing 50% of glycerol according to the mass percent; S3, pouring the solution of the S1 and the solution of the S2 into a vessel according to the ratio of 3: 1 to mix, and using a magnetic stirrer to stir uniformly. The low-temperature composite phase change cold storage agent is low in phase change temperature, large in phase change latent heat, easy to prepare, low in cost, low in use concentration, small in volume change in the phase change process, safe to use, non-toxic, odorless, pollution free, and small in corrosivity.

Description

technical field [0001] The invention relates to the technical field of cold storage, in particular to a low-temperature composite phase-change cold storage agent and a preparation method thereof. Background technique [0002] At present, the low-temperature cold storage materials that are widely used are mainly inorganic salt solutions and organic phase change materials. Inorganic salt solution (sodium chloride solution, ammonium chloride solution, etc.) has the advantages of low phase transition temperature and large phase transition latent heat, but there will be unfavorable factors such as supercooling and phase separation during use, which will affect its cold storage capacity. Metal containers are highly corrosive. Organic phase change materials (mainly alcohols, alkanes, and paraffins) have the advantages of small undercooling, no phase separation, and low corrosion, but organic materials generally have higher phase transition temperatures, lower latent heat of phase ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 谢如鹤刘广海李靖陶文博
Owner GUANGZHOU UNIVERSITY
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