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Long-acting low-temperature phase-change cool-storage material, and preparation method thereof

A technology of low-temperature phase change and cold storage materials, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of inconvenient use, supercooling phenomenon, low latent heat value of phase change, etc., and achieve wide solidification temperature range, large phase The effect of variable latent heat and long-term cooling effect

Inactive Publication Date: 2014-07-02
SHANGHAI CHANCE ENERGY EFFICIENCY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, eutectic salt and paraffin are both commonly used cooling agents, but each has its own advantages and disadvantages: the working range of eutectic salt is adjustable, and it is convenient to use, but the latent heat value of phase change is low, and there is supercooling phenomenon during phase change and solidification; paraffin Stable properties, relatively high latent heat value of phase change, but single working temperature, inconvenient to use

Method used

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  • Long-acting low-temperature phase-change cool-storage material, and preparation method thereof
  • Long-acting low-temperature phase-change cool-storage material, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Under normal temperature and pressure, ammonium chloride, sodium nitrate, and sodium phosphate were dissolved in water according to the components specified in Table 1, and stirred at 5000r / min for 30 minutes; Sodium dialkylbenzenesulfonate was mixed and stirred at 5000r / min for 1 hour; then the aqueous and organic phases obtained in the above two steps were mixed and stirred at 5000r / min for 2 hours. Then the phase change temperature and latent heat of phase change of the obtained phase change cold storage material were tested, and the test results are listed in Table 1.

[0019] The present invention also carried out a further experiment on the phase-change cold storage material obtained according to the above ratio, using a commercially available common 26L incubator, and the insulation layer was polyurethane foam with a thickness of 2cm. At a constant room temperature of 18°C, 5kg of the phase-change cold storage material obtained according to the above proportions ...

Embodiment 2

[0021] Repeat the method of Example 1 with the content of each component specified in Table 1, but replace sodium dodecylbenzenesulfonate with Span 80 (Sorbitan monooleate), and the test results are shown in Table 1.

Embodiment 3

[0023] Repeat the method of Example 1 according to the content of each component specified in Table 1, but replace dodecane with a mixture of Tween 80 (polyoxyethylene sorbitan monooleate) and lecithin in a weight ratio of 1:1 Sodium phenyl sulfonate, the test results are listed in Table 1.

[0024] Table 1

[0025]

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Abstract

The invention discloses a long-acting low-temperature phase-change cool-storage material, and a preparation method thereof. The long-acting low-temperature phase-change cool-storage material is composed of, by weight, 10 to 15% of ammonium chloride, 5 to 10% of sodium nitrate, 1 to 5% of sodium phosphate, 10 to 20% of n-dodecane, 10 to 15% of n-decane, 5 to 10% of a surfactant, and the balance water. The preparation method comprises following steps: (a) ammonium chloride, sodium nitrate, and sodium phosphate are dissolved in water, and an obtain mixture liquid is stirred so as to realize complete dissolving; (b) n-dodecane, n-decane, and the surfactant are mixed, and an obtained mixed solution is stirred to be uniform; (c) the mixture liquid is mixed with the mixed solution, and an obtained product is stirred to be uniform. Solidification temperature of the long-acting low-temperature phase-change cool-storage material ranges from -30 to -12 DEG C, phase change latent heat ranges from 300 to 340J / g, and long-term refrigeration can be realized.

Description

technical field [0001] The invention relates to a cold storage material and a preparation method thereof, in particular to a long-acting low-temperature phase change cold storage material and a preparation method thereof. Background technique [0002] In daily life, we often encounter situations that require long-distance preservation of low-temperature frozen items. Typically, dry ice is used to meet this need. However, dry ice has the following disadvantages: it cannot be recycled; storage in airtight containers may cause explosion hazards; the manufacturing technology is special and the manufacturing cost is high; the gasification temperature of dry ice is too low, and improper operation may cause personal injury, etc. [0003] In order to solve the above problems, phase change cold storage materials came into being. Their working principle is to use the phenomenon that the working fluid absorbs a large amount of heat during the process of changing from one phase to anot...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCY02E60/147Y02E60/14
Inventor 陈继泽
Owner SHANGHAI CHANCE ENERGY EFFICIENCY TECH
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