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Composite fixing phase change material of 79-83 deg.c and its preparing method

A technology of shape-setting phase change materials and latent heat of phase change, which is applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems that qualitative phase change materials have not made great progress, and achieve low weight loss rate and stable material properties. Effect

Inactive Publication Date: 2006-06-07
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But so far, qualitative phase change materials that can be used in higher temperature environments and have good packaging effects have not made great progress.

Method used

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  • Composite fixing phase change material of 79-83 deg.c and its preparing method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Put 800g of paraffin wax with a melting point of 81.6°C and a latent heat of phase transition of 209.1kJ / kg into the reactor, heat and melt at 100-120°C, put 150g of high-density polyethylene into it, and raise the temperature to 140-160°C , stir at a speed of 100r / min until the paraffin wax and high-density polyethylene are integrated into a viscous liquid, add 100g of SEBS, stir evenly, and finally add 50g of expanded graphite, stir evenly. The blend is taken out and put into a mold of 140*140*10mm, and pressed with a pressure of 300kPa. After cooling, it is taken out from the mold to obtain a fixed-shape phase-change material. Using the Pyris Diamond differential scanning calorimeter of PE Company in the United States, the peak value of the melting curve of the material is 82.31° C., and the latent heat of phase change is 149.2 kJ / kg. Take a 30*30*10mm shaped phase change material and soak it in hot water at 88°C for 200 hours. The material has no obvious deformatio...

Embodiment 2

[0017] Put 800g of paraffin wax with a melting point of 81.6°C and a latent heat of phase transition of 212.5kJ / kg into the reactor, heat and melt at 100-120°C, put 100g of high-density polyethylene into it, and raise the temperature to 140-160°C , Stir at a speed of 120r / min until the paraffin wax and high-density polyethylene are integrated into a viscous liquid, add 50g of SEBS, stir evenly, and finally add 50g of expanded graphite, stir evenly. The blend is taken out and put into a mold of 140*140*10mm, and pressed with a pressure of 200kPa. After cooling, it is taken out from the mold to obtain a fixed-shape phase-change material. Using the Pyris Diamond differential scanning calorimeter of the American PE company, the peak value of the melting curve of the material is 81.62 ° C, and the latent heat of phase change is 168.8. Take a 30*30*10mm shaped phase change material and soak it in 88°C hot water for 200 hours. The material has no obvious deformation. After drying, i...

Embodiment 3

[0019] Put 800g of paraffin wax with a melting point of 81.6°C and a latent heat of phase transition of 212.5kJ / kg into the reactor, heat and melt at 100-120°C, put 150g of high-density polyethylene into it, and raise the temperature to 140-160°C , Stir at a speed of 120r / min until the paraffin wax and high-density polyethylene are integrated into a viscous liquid, add 50g of SEBS, stir evenly, and finally add 50g of expanded graphite, stir evenly. The blend is taken out and put into a mold of 140*140*10mm, and pressed with a pressure of 300kPa. After cooling, it is taken out from the mold to obtain a fixed-shape phase-change material. Using the Pyris Diamond differential scanning calorimeter of PE Company in the United States, the peak value of the melting curve of the material is 83.83° C., and the latent heat of phase change is 153.0 kJ / kg. Take a 30*30*10mm shaped phase change material and soak it in hot water at 88°C for 200 hours. The material has no obvious deformation...

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Abstract

The composite fixed 76-83 deg C phase change material and its preparation belongs to the field of phase change heat accumulating material technology. The present invention has SEBS of smelting point 76-81.6 deg C as the packing and oil absorbing material and paraffin of phase change latent heat 200-220 kJ / kg as main energy storing material, and consists of paraffin in 66-80 wt%, high density polyethylene in 11-15 wt%, SEBS in 4-12 wt% and expanded graphite in 3-7 wt%. The composite phase change material is prepared through smelting paraffin in a reactor, adding and smelting high density polyethylene and SEBS, adding expanded graphite and mixing homogeneously, molding at 200-300 KPa pressure to form plate, cooling and demoulding. The material may be set directly inside boiler to contact water as heat transferring medium, and after soaking in hot water in temperature above the smelting point for 200 hr, it has weight loss less than 2 % and phase change latent heat change less than 10 %.

Description

technical field [0001] The invention relates to paraffin wax as the main heat storage agent, high-density polyethylene HDPE as the encapsulation support material, hydrogenated styrene-butadiene-styrene triblock copolymer SEBS as the encapsulation oil-absorbing material, and expanded graphite EG as the heat-conducting filler Composite shape-setting phase change material and preparation method thereof. Background technique [0002] Energy is the basis for human survival and development. With the development of science and technology, human beings' demand for energy is increasing day by day, but at the same time, the utilization rate of energy is not high, which makes the supply of energy increasingly tense. Energy storage technologies used in industrial waste heat recovery, phase change energy storage electric heaters, energy-saving air conditioners and other fields can not only reduce energy consumption, but also enable the power system to achieve the effect of "shaving peak...

Claims

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Application Information

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IPC IPC(8): C09K5/06
Inventor 夏定国方春香焦庆影陈超于志辉戚道铎
Owner BEIJING UNIV OF TECH
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