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Phase change material for thermal energy storage and preparation method thereof.

A phase change energy storage material and a phase change material technology, which are applied in the field of composite stereotyped energy storage phase change materials of mixed acid/expanded graphite and their preparation, which can solve the problems of low thermal conductivity, liquid leakage, restricting the application of organic phase change materials, etc. problem, to achieve the effect of high thermal conductivity, large energy storage, and fixed energy storage form

Inactive Publication Date: 2013-03-20
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal conductivity of organic phase change materials is low, and there are problems such as liquid leakage in solid-liquid phase transitions, which restrict the application of organic phase change materials.

Method used

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  • Phase change material for thermal energy storage and preparation method thereof.
  • Phase change material for thermal energy storage and preparation method thereof.
  • Phase change material for thermal energy storage and preparation method thereof.

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) Take 3-4g of expandable graphite and dry it in a 60°C drying oven, then take an appropriate amount of expandable graphite in an evaporating dish each time, put the container in a microwave oven, and adjust the power of the microwave oven to 700W, and you can get worms after 30s shaped expanded graphite.

[0032] 2) In a water bath at 80°C and at a speed of 500r / min, prepare a capric acid-lauric acid-palmitic acid ternary eutectic mixed acid system, wherein capric acid: lauric acid: palmitic acid=3:5:2 (mass ratio ), stirred for 1.5h, so that the eutectic mixture was evenly mixed, and set aside.

[0033] 3) Add the prepared capric acid-lauric acid-palmitic acid ternary eutectic mixed acid into a beaker equipped with expanded graphite, wherein capric acid-lauric acid-palmitic acid: expanded graphite=90:10 (mass ratio), at 85 Heating in a drying oven at ℃ for 2 hours, taking it out and dispersing it in an ultrasonic cleaner for 10-15 minutes to obtain a composite phase...

Embodiment 2

[0038] 1) Take 3-4g of expandable graphite and dry it in a 60°C drying oven, then take an appropriate amount of expandable graphite in an evaporating dish each time, put the container in a microwave oven, and adjust the power of the microwave oven to 700W, and you can get worms after 30s shaped expanded graphite.

[0039] 2) In a water bath at 80°C and at a speed of 500r / min, prepare a capric acid-lauric acid-palmitic acid ternary eutectic mixed acid system, wherein capric acid: lauric acid: palmitic acid = 5: 3: 2 (mass ratio ), stirred for 1.5h, so that the eutectic mixture was evenly mixed, and set aside.

[0040] 3) Add the prepared capric acid-lauric acid-palmitic acid ternary eutectic mixed acid into a beaker equipped with expanded graphite, wherein capric acid-lauric acid-palmitic acid: expanded graphite=94:6 (mass ratio), at 80 Heating in a drying oven at ℃ for 2 hours, taking it out and dispersing it in an ultrasonic cleaner for 10-15 minutes to obtain a composite ph...

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Abstract

The present invention relates to a phase change material for thermal energy storage and a preparation method thereof. The phase change material for thermal energy storage adopts expanded graphite phase as a carrier to adsorb organic fatty acids of different ratios, and then a composite coating agent is coated on the outside of the prepared material. The adsorption of organic fatty acids into the expanded graphite carrier improves the thermal conductivity of the organic acids as the phase change material, and suppresses the liquid leakage problem of the organic acids when the organic acids are applied in thermal storage techniques; and the composite coating agent further performs reinforcing and shaping functions.

Description

technical field [0001] The invention belongs to the field of composite energy storage phase change materials, in particular to a mixed acid / expanded graphite composite shaped energy storage phase change material and a preparation method thereof. Background technique [0002] Phase change materials use the property of absorbing (or releasing) a large amount of heat when a substance undergoes a phase change to store heat. It has the advantages of high heat storage density, small equipment volume, high thermal efficiency, and heat absorption and release are constant temperature processes. It has broad application prospects in solar energy utilization, building energy saving, heat energy recovery, aerospace and other fields. [0003] Heat storage technologies mainly include sensible heat storage, latent heat storage and chemical reaction heat storage. Among them, the heat storage method using the solid-liquid phase change latent heat of phase change materials has become the res...

Claims

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Application Information

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IPC IPC(8): C09K5/06
Inventor 孙立贤孟新张焕芝赵梓名徐芬
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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