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Low-temperature phase change coolant

A technology of low temperature phase change and cool storage agent, which is applied in heat exchange materials, chemical instruments and methods, etc., can solve the problem of lack of cool storage agent, etc., and achieve the effect of large latent heat value of phase change, low phase change temperature and small expansion coefficient.

Inactive Publication Date: 2019-06-21
SHIHEZI UNIVERSITY
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  • Claims
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Problems solved by technology

However, due to the lack of research on low-temperature (below -20°C) phase change materials for existing cold storage technology, and the lack of cold storage agents suitable for low-temperature transportation environments, the application of cold storage technology in cold chain transportation is subject to technical bottlenecks.

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Embodiment Construction

[0021] The present invention will be described in further detail below in conjunction with the embodiments and with reference to the accompanying drawings, but the embodiments do not limit the present invention in any form.

[0022] In this embodiment, a low-temperature phase-change cold storage agent is composed of the following proportions by mass percentage: sodium chloride: 15%, ethanol: 10%, and water: 75%. Above-mentioned sodium chloride and ethanol are more than 99%, and water is pure water or distilled water.

[0023] The preparation method of described low-temperature cold storage agent is as follows:

[0024] S1. Add 75% water and 15% sodium chloride in a clean container, stir until uniform with a magnetic stirrer, and let stand for a while;

[0025] S2. Add 10% ethanol into the container and stir until uniform with a magnetic stirrer.

[0026] The preparation process of the low-temperature cool storage agent is always carried out at room temperature and normal pre...

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Abstract

The invention provides a formula of a low-temperature phase change coolant. The coolant comprises the following compounds in proportion in percentages by weight: 15% of sodium chloride, 10% of ethanoland 75% of water. The low-temperature phase change coolant in the invention has the characteristics of low phase change temperature, large phase change latent heat, wide raw material resource, low cost, no crystal-liquid separation phenomenon after repeated phase change, small coefficient of cubical expansion and the like, the low-temperature phase change coolant can be reused repeatedly and is basically free of corrosion, and the low-temperature phase change coolant can be widely applied to cold-chain logistics equipment of frozen food, biological medicine and vaccines.

Description

technical field [0001] The invention relates to the technical field of low-temperature cold storage, in particular to a low-temperature phase-change cold storage agent with low phase change temperature, large phase change latent heat value, repeated use, basically no corrosion, and small volume expansion coefficient. Background technique [0002] According to the composition of materials, phase change cold storage materials include two categories: inorganic and organic. Inorganic phase change materials mainly include crystalline hydrated salts, molten salts, metals and alloys, etc. Among them, inorganic salts are the most widely used due to their advantages of cheap price, large volume heat storage density, large phase change latent heat, fixed melting point, and higher thermal conductivity than organic phase change materials, such as ammonium chloride solution and sodium chloride solution. The solution has been developed into a commercial PCM. However, there are unfavorab...

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Application Information

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IPC IPC(8): C09K5/06
CPCY02E60/14
Inventor 李靖李俊峰任玉成汪秋刚额热艾汗王昭阳
Owner SHIHEZI UNIVERSITY
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