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Quaternary dodecahydrate disodium hydrogen phosphate-based phase change heat storage material that can be packaged in aluminum

A disodium hydrogen phosphate-based, phase-change heat storage technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve problems such as corrosion, difficulty in using aluminum packaging, and aluminum strength.

Active Publication Date: 2021-02-26
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Na 2 HPO 4 •12H 2 O has a strong corrosion to aluminum, it is difficult to use aluminum for its packaging

Method used

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  • Quaternary dodecahydrate disodium hydrogen phosphate-based phase change heat storage material that can be packaged in aluminum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 95% Na 2 HPO 4 12H 2 O, 3% Na 2 SO 4 10H 2 O, 1% Na 2 SiO 3 9H 2 O, 1% Na 2 CrO 4 4H 2 O, added to the container together, and the container was sealed and placed in a constant temperature water bath at 70°C. After 40 minutes, the hydrated salt in the container was completely melted, and then cooled in a constant temperature water bath at 20°C to obtain quaternary Na 2 HPO 4 •12H 2 O-based phase change thermal storage composite materials. The corrosion rate of this material to aluminum is 0.03mm / a, and the corrosion resistance of metal aluminum is available.

Embodiment 2

[0017] 89% Na 2 HPO 4 12H 2 O, 7% Na 2 SO 4 10H 2 O, 2% Na 2 SiO 3 9H 2 O, 2% Na 2 CrO 4 4H 2 O, added to the container together, and the container was sealed and placed in a constant temperature water bath at 70°C. After 43 minutes, the hydrated salt in the container was completely melted, and then cooled in a constant temperature water bath at 20°C to obtain quaternary Na 2 HPO 4 •12H 2 O-based phase change thermal storage composite materials. The corrosion rate of this material to aluminum is 0.02mm / a, and the corrosion resistance of metal aluminum is available.

Embodiment 3

[0019] 85% Na 2 HPO 4 12H 2 O, 10% Na 2 SO 4 10H 2 O, 1% Na 2 SiO 3 9H 2 O, 4% Na 2 CrO 4 4H 2 O, added to the container together, and the container was sealed and placed in a constant temperature water bath at 70°C. After 43 minutes, the hydrated salt in the container was completely melted, and then cooled in a constant temperature water bath at 20°C to obtain quaternary Na 2 HPO 4 •12H 2 O-based phase change thermal storage composite materials. The corrosion rate of this material to aluminum is 0.04mm / a, and the corrosion resistance of metal aluminum is available.

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Abstract

The invention discloses a quaternary dodecahydrate disodium hydrogen phosphate-based phase change thermal storage material which can be packaged with aluminum. The components and their mass percentages are: Na 2 HPO 4 •12H 2 O 75%~95%; Na 2 SO 4 •10H 2 O 3%~22%; Na 2 SiO 3 9H 2 O 1%~4%; Na 2 CrO 4 • 4H 2 O 1%~3%, the above composite material can also contain water, wherein the mass ratio of composite material to water is 1: (1~1.3). The invention relates to phase change thermal storage materials, enhanced thermal conductivity and reduced supercooling in thermal energy utilization, especially the realization of Na 2 HPO 4 •12H 2 Controlling the supercooling degree of O-based phase change thermal storage materials broadens its scope of use and improves its stability.

Description

technical field [0001] The invention relates to a quaternary dodecahydrate disodium hydrogen phosphate-based phase change thermal storage material which can be encapsulated by aluminum. Background technique [0002] Inorganic salt phase change materials are solid-liquid phase change materials, which are in a liquid state when the phase transition occurs, so they need to be stored in containers, and the choice of container materials is also an important issue to be considered in the application of inorganic salt phase change materials. Common container materials are metal, plastic, composite film and so on. One of the main problems in the application of inorganic hydrated salt phase change materials is its corrosiveness. Most low-temperature hydrated salt heat storage materials will strongly corrode metal and alloy packaging materials. When the container material and the phase change material are corroded, it is easy to cause material leakage, pollute the environment, and en...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06
CPCC09K5/063
Inventor 郑茂盛谢超超柳佳靳浩滕海鹏魏利平
Owner NORTHWEST UNIV