Low-temperature composite phase-change coolant and preparation method thereof

A technology of phase-change cold storage agent and temperature-sensitive discoloration, which is applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of high temperature energy consumption and limited economy, and achieve good heat transfer performance and low preparation cost , enhance the effect of thermal conductivity

Inactive Publication Date: 2020-09-11
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many low-temperature composite phase-change materials in use at home and abroad, but the phase-change temperatures of various phase-change cool storage agents for cold chains are mostly below 10°C. For chemical products, biological drugs, etc., the energy consumption is high at too low temperature, and the economical efficiency of use is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this embodiment, a phase-change cold storage agent for cold chain, calculated by weight percentage, includes n-hexadecane, 52# paraffin, copper nanoparticles, food flavor, food coloring, organic reversible thermochromic material, the composition of which The weight percent content is as follows, n-hexadecane is 61%, 52# paraffin is 38.9%, and copper nanoparticles are 0.1%; the addition amount of food essence is that every kilogram of cold chain uses phase-change cold storage agent to add 0.01g; The addition amount is 0.02g per kilogram of phase-change cool storage agent for cold chain; the addition amount of the organic reversible thermochromic material is 0.1g per kilogram of phase-change cool storage agent for cold chain.

[0039] When preparing the composite phase change cold storage agent, first mix n-hexadecane and 52# paraffin in an appropriate proportion and melt in a constant temperature water bath at 60°C-70°C for more than 15 minutes, then add copper nanopar...

Embodiment 2

[0042] In this embodiment, a phase-change cold storage agent for cold chain, calculated by weight percentage, includes n-hexadecane, 52# paraffin, copper nanoparticles, food flavor, food coloring, organic reversible thermochromic material, the composition of which The weight percent content is as follows, n-hexadecane is 67.9%, 52# paraffin is 32%, and copper nanoparticles are 0.1%; the amount of food flavor added is 0.01g per kilogram of cold chain with phase change cold storage agent; The addition amount is 0.02g per kilogram of phase-change cool storage agent for cold chain; the addition amount of the organic reversible thermochromic material is 0.1g per kilogram of phase-change cool storage agent for cold chain.

[0043] When preparing the composite phase change cold storage agent, first mix n-hexadecane and 52# paraffin in an appropriate proportion and melt in a constant temperature water bath at 60°C-70°C for more than 15 minutes, then add copper nanoparticles, organic re...

Embodiment 3

[0046] In this embodiment, a phase-change cold storage agent for cold chain, calculated by weight percentage, includes n-hexadecane, 52# paraffin, and copper nanoparticles. The weight percentage content of each component is as follows, n-hexadecane is 64.5%, 52# paraffin is 35.4%, and copper nanoparticles are 0.1%.

[0047]When preparing the composite phase change cold storage agent, first mix n-hexadecane and 52# paraffin in an appropriate proportion and melt in a constant temperature water bath at 60°C-70°C for more than 15 minutes, then add copper nanoparticles, organic reversible After adding the thermochromic material, food flavor and food coloring, stir with a magnetic stirrer for 1-2 hours at 60°C-70°C, and then cool to room temperature.

[0048] The phase change temperature of the phase change cold storage agent for cold chain is 16.8°C, and the latent heat of phase change is 203.2J / g.

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Abstract

The invention discloses a phase-change coolant for a cold chain and a preparation method thereof. The phase-change coolant for a cold chain contains n-hexadecane, 52 # paraffin and copper nanoparticles. The cold-chain coolant is simple in preparation process, high in stability, good in heat transfer performance and large in latent heat of cold accumulation. The phase-change coolant is wide in application range, is particularly suitable for cold storage and fresh keeping of perishable foods (like chocolate and red wine), chemical products and biological medicines and the like which cannot be over-high in temperature during transportation, and can also be used as a coolant of a constant-temperature cold storage refrigeration house.

Description

technical field [0001] The patent of the invention relates to the technical field of cold storage, in particular to a phase-change cold storage agent for cold chains and a preparation method thereof. Background technique [0002] Among the various links of fresh and perishable food logistics, refrigerated transportation is recognized as one of the key links to ensure food quality and safety and extend the shelf life of perishable food due to the complex external environment. As an important carrier of refrigerated transportation, there are about 4 million refrigerated vehicles in use around the world, and they continue to grow at a rate of 2.5% per year; in recent years, refrigerated transportation in my country has developed rapidly. By the end of 2019, the number of refrigerated vehicles had reached 20 million vehicles. However, it should also be noted that more than 90% of the currently used refrigerated vehicles use mechanical refrigeration systems, and the energy utiliz...

Claims

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Application Information

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IPC IPC(8): C09K5/06
CPCC09K5/066Y02E60/14
Inventor 刘广海谢如鹤邹毅峰
Owner GUANGZHOU UNIVERSITY
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