High heat conductive fixed phase change heat storage material suitable for large scale industrial production

A technology of shape-setting phase change and heat storage materials, which is applied in the field of high thermal conductivity shape-change heat storage materials and shape-fixed phase change heat storage materials. Good thermal conductivity, broad application prospects, and the effect of solving processing technology problems

Inactive Publication Date: 2005-03-02
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Because the melting points of the phase change material paraffin and the support material are far apart, and the paraffin itself has good lubricating properties, the processing equipment is severely slippery, so large-scale processing is very difficult
The shape-fixed phase change materials reported in the prior art have poor thermal conductivity on the one hand, and the storage and release of heat are delayed. On the other hand, even if some systems have good thermal conductivity, the preparation methods of these materials are not suitable for large-scale industrial use. Production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Mix 80% of paraffin wax with a melting point of 20°C with 10% polyethylene, 5% titanium dioxide, and 5% graphite evenly, and successfully extrude in a twin-screw extruder once.

[0010] The measured thermal conductivity of the material is 0.204W / mK. It is 74% higher than the thermal conductivity of paraffin (0.117W / mK).

Embodiment 2

[0012] Mix 50% paraffin wax with a melting point of 15°C with 30% SBS, 10% diatomaceous earth, and 10% iron powder, and successfully extrude it in a twin-screw extruder once.

[0013] The thermal conductivity of the measured material is 0.211W / mK, which is 80% higher than that of paraffin.

Embodiment 3

[0015] Mix 60% paraffin wax with a melting point of 70°C with 10% polypropylene, 10% SEBS, 5% montmorillonite, and 15% graphite, and successfully extrude in a twin-screw extruder once.

[0016] The measured thermal conductivity of the material is 0.310W / mK, which is 165% higher than that of paraffin.

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Abstract

The present invention relates to a high heat conductivity shaped phase change heat storing material suitable for large scale production, and belongs to the field of phase change material for building. The present invention consists of phase change heat storing material paraffin of phase change temperature 15-70 deg.c in 50-80 wt%; high molecular weight support material polyethylene, polypropylene, SBS and/or SEBS in 10-30 wt%; machining modifier alumina, montmorillonite, diatomite, clay, titania powder, calcium carbonate, bentonite and/or silica in 5-20 wt%; and heat conducting additive metal powder or graphite powder 5-15 wt%. The material may be well produced in large scale, has excellent heat conducting performance and is especially suitable for use in building.

Description

technical field [0001] The invention relates to a shape-fixed phase-change heat storage material, in particular to a high-thermal conductivity shape-change heat storage material suitable for large-scale industrial production, and belongs to the technical field of phase-change materials for construction. Background technique [0002] At present, building heating is mainly based on coal, which not only has low heat utilization efficiency, but also causes serious air pollution. Therefore, natural gas heating and electric heating are gradually replacing coal-fired heating. Natural gas heating is convenient, but expensive. Electric heating (such as electric heating) has caused serious peak and valley phenomena in electricity consumption due to the concentrated use time of users. The power supply is tight during the peak period of electricity consumption, and a large number of power resources are idle during the low period of electricity consumption. For this reason, many large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/02
Inventor 杨睿郭宝华
Owner TSINGHUA UNIV
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