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

High-performance medium-temperature inorganic phase-change material and preparation method thereof

An inorganic phase change material, high-performance technology, applied in heat exchange materials, chemical instruments and methods, climate sustainability, etc., can solve the problems of unstable phase separation, difficult long-term use, etc., and achieve simple and easy preparation methods Good encapsulation and recyclability

Inactive Publication Date: 2012-02-15
TIANJIN UNIV OF SCI & TECH
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, some inorganic phase change materials disclosed in the prior art in this temperature range are prone to phase separation after repeated heat absorption and heat release, resulting in instability, and are not easy to use for a long time

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
  • High-performance medium-temperature inorganic phase-change material and preparation method thereof
  • High-performance medium-temperature inorganic phase-change material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A high-performance medium-temperature inorganic phase change material, the raw materials and mass percentages are:

[0021] Magnesium nitrate hexahydrate (Mg(NO 3 ) 2 ·6H 2 O) 86%

[0022] Lithium nitrate (LiNO) 3 ) 14%.

[0023] The preparation method is as follows: according to the above mass ratio, the crystal of magnesium nitrate hexahydrate and lithium nitrate are uniformly mixed to obtain a heat storage system, and the above heat storage system is placed in a glass test tube with a diameter of 30 mm, melted in a 90 ℃ water bath, and the sample is completely melted. Then keep the temperature for more than 10min to make the sample mix more evenly, and finally pour the mixture into a container for packaging.

[0024] The following matters should be paid attention to in the production process:

[0025] 1. The packaging container can be made of plastic or metal, and the shape can be spherical, rectangular, cubic or cylindrical, but no matter which packaging metho...

Embodiment 2

[0029] A high-performance medium-temperature inorganic phase change material, the raw materials and mass percentages are:

[0030] Magnesium nitrate hexahydrate (Mg(NO 3 ) 2 ·6H 2 O) 90%;

[0031] Lithium nitrate (LiNO) 3 ) 10%.

[0032] The preparation method is as follows: uniformly mixing magnesium nitrate hexahydrate crystals and lithium nitrate according to the above mass ratio to obtain a heat storage system, placing the above heat storage system in a glass test tube with a diameter of 30 mm, and heating it in a 90°C water bath until the sample is melted. , the sample is completely melted and then kept for more than 10 minutes to make the sample mix more evenly, and finally the mixture is poured into a container for packaging.

[0033] The following matters should be paid attention to in the production process:

[0034] 1. The packaging container can be made of plastic or metal, and the shape can be spherical, rectangular, cubic or cylindrical, but no matter which ...

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
phase transition enthalpyaaaaaaaaaa
melting pointaaaaaaaaaa
phase transition temperatureaaaaaaaaaa
Login to View More

Abstract

The invention relates to a high-performance medium-temperature inorganic phase-change material and a preparation method thereof. The materials of the inorganic phase-change material and the weight percentage ranges of the materials are as follows: 86 to 90 percent of magnesium nitrate hexahydrate; and 10 to 14 percent of lithium nitrate. The preparation method includes the following steps: the magnesium nitrate hexahydrate and the lithium nitrate are uniformly mixed according to the weight percentage, are completely melted under the temperature of 90 DEG C and are packaged, and thereby the finished inorganic phase-change material produce is prepared. The materials of the medium-temperature phase-change energy-storing material provided by the invention are abundant, the price is low, the medium-temperature phase-change energy-storing material is nontoxic and noncorrosive, the preparation method is simple, the latent heat of phase change is high, the phase change temperature is between 62 DEG C and 73 DEG C, the performance is excellent, repetitive experiments prove that the performance of the inorganic phase-change material is stable, and the inorganic phase-change material does not have the phenomena of undercooling or phase separation, and can be widely popularized and applied in fields such as electric heating elements, heat storage and temperature regulation of water heaters, daily energy-saving products and the like.

Description

technical field [0001] The invention relates to a composite phase-change energy storage material, which is applied to electric heating elements, water heater heat storage and temperature adjustment and daily energy-saving products, in particular to a high-performance medium-temperature inorganic phase-change material and a preparation method thereof. Background technique [0002] The phase change energy storage technology uses the characteristics of substances to absorb or release energy during the constant temperature phase change process, and store the temporarily unused energy, and then use it when needed, thus solving the problem of heating and heat consumption due to time or place. The problem of low energy utilization rate caused by mismatch and unevenness, in order to maximize the thermal efficiency of the entire heating system, has shown a very wide range of and important applications in the fields of energy, aerospace, military, agriculture, construction, chemical in...

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
CPCY02P20/10
Inventor 邓天龙闫东军郭亚飞王士强高道林李玉婷
Owner TIANJIN UNIV OF SCI & TECH
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