Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Composite low-temperature phase-change cold storage material

A cold storage material and low-temperature phase change technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of not easy to decompose, thermal performance attenuation, etc., and achieve easy operation, small supercooling degree, and appropriate phase change temperature Effect

Inactive Publication Date: 2014-02-26
SHANGHAI MARITIME UNIVERSITY
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic phase change cold storage materials have high phase change latent heat value per unit volume and good thermal conductivity. The disadvantage is that it is prone to supercooling and phase separation, and the thermal performance will be seriously attenuated after long-term use.
[0004] There are many reports on low-temperature phase-change cold storage materials, but there are few studies on ultra-low temperature (below -45°C) phase-change materials. Therefore, there is a need for a cold storage material with good stability, not easy to decompose, safe, non-toxic, and low cost. It can be used in ultra-low temperature refrigerated trucks to transport frozen food, biological products, medicines and vaccines with special requirements
About the composite low-temperature phase-change cold storage material of the present invention, there is no report yet

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Composite low-temperature phase-change cold storage material
  • Composite low-temperature phase-change cold storage material
  • Composite low-temperature phase-change cold storage material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～ Embodiment 6

[0021] Preparation and performance testing of cold storage materials in Examples 1 to 6

[0022] Weigh each raw material according to the weight percentage shown in Table 1, mix the weighed expanded graphite and n-hexanol with an ultrasonic oscillator, and cool to room temperature to obtain a composite low-temperature phase change cold storage material.

[0023] Each raw material weight percentage in table 1 embodiment 1~embodiment 6

[0024] raw material

Example 1

Example 2

Example 3

Example 4

Example 5

Example 6

expanded graphite

5%

5.2%

5.7%

6.1%

6.5%

7%

[0025] n-Hexanol

95%

94.8%

94.3%

93.9%

93.5%

93%

[0026] Performance tests were performed on the phase change cold storage materials prepared in Examples 1 to 6 in Table 1. Phase change latent heat adopts differential scanning calorimetry (DSC), test conditions: 1) purge gas and flow rate: high-purity nitrogen...

Embodiment 7

[0029] Example 7 Cyclic charging / discharging performance test of cold storage material

[0030] Prepare three cold storage materials, namely 5.2% expanded graphite + 94.8% n-hexanol, 5.7% expanded graphite + 94.3% n-hexanol, 6.1% expanded graphite + 93.9% n-hexanol, and charge the three cold storage materials 50 times Cold and cooling experiments, see the results figure 1 . From figure 1 It can be seen from the figure that the cycle charging and cooling performance of the three phase change cold storage materials are relatively good, and the fluctuation range of the phase change temperature is relatively fixed. After 50 times of cooling and cooling experiments, the 5.2% expanded graphite + 94.8% n-hexanol and 5.7% expanded graphite + 94.3% n-hexanol cold storage materials appeared solid-liquid separation phenomenon, and the 6.1% expanded graphite + 93.9% n-hexanol There is no solid-liquid separation phenomenon in the cold storage material, indicating that the expanded graph...

Embodiment 85

[0031] Example 85.7% expanded graphite + 94.3% n-hexanol phase change cold storage material characteristic analysis

[0032] Through the cooling and cooling experiments of n-hexanol, 5.7% expanded graphite + 94.3% n-hexanol phase change cold storage materials, their phase change start temperature, phase change end temperature, and phase change time can be obtained. The results are shown in Table 3.

[0033] Table 3 Phase change temperature and cold charging time of phase change cold storage materials

[0034]

[0035]

[0036] It can be seen from Table 3 that when the flow rate is 120L / h, compared with n-hexanol, the phase change charging and cooling time of expanded graphite + n-hexanol phase change material is shortened by 41%, which also shows that the phase change is greatly increased after adding expanded graphite. Thermal conductivity of cold storage materials. The cooling time and cooling flow rate of expanded graphite + n-hexanol phase change material show a lin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a composite low-temperature phase-change cold storage material which is prepared from the following components by the weight percentage: 5%-7% of expanded graphite, and 93%-95% of n-hexanol. The composite low-temperature phase-change cold storage material is obtained by mixing evenly the expanded graphite and n-hexanol and then cooling to the room temperature. The cold storage material is in a semi-fluid state, can adapt to containers with different shapes, has no corrosiveness, and also does not easily generate leakage pollution problems; the cold storage material has high phase change latent heat, high thermal conductivity coefficient, appropriate phase change temperature, small degree of supercooling, and good charge / discharge cold circulation performance, and is applicable to a cold storage refrigeration car system; and the cool storage material has a few of components, allows the preparation method to be simple and easy to operate, has easily obtained raw materials, and is suitable for industrialized popularization.

Description

technical field [0001] The invention relates to the technical field of phase-change materials, in particular to a composite low-temperature phase-change cold storage material. Background technique [0002] Phase change cold storage material is a functional material for storing cold energy in a phase change cold storage system. Using its storage and release of cold energy to achieve the purpose of shifting peak use of cold and shifting peaks to fill valleys, it is at the core of cold storage technology. The general requirements for phase change cold storage materials are: (1) High latent heat of phase change, large latent heat of phase change, only need less cold storage material and smaller ice storage tank volume to store the same cold capacity; ( 2) It has a suitable phase transition temperature. For the refrigerated transportation industry, the refrigerated transportation temperature of some special products such as tuna is required to be below -45°C; (3) The phase transi...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCY02E60/147Y02E60/14
Inventor 章学来黄艳赵群志陈旭东袁园甘伟罗孝学华维三王惠惠
Owner SHANGHAI MARITIME UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com