Quaternary sodium phosphate dibasic dodecahydrate-based phase change heat storage material capable of being encapsulated by aluminum

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

Active Publication Date: 2018-11-16
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Na 2 HPO 4 •12H 2 O has a strong corrosion to al...

Method used

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  • Quaternary sodium phosphate dibasic dodecahydrate-based phase change heat storage material capable of being encapsulated by aluminum

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Experimental program
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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 sodium phosphate dibasic dodecahydrate-based phase change heat storage material capable of being encapsulated by aluminum. The material comprises the components, in percent by mass, 75-95% of Na2HPO4.12H2O, 3-22% of Na2SO4.10H2O, 1-4% of Na2SiO3.9H2O and 1-3% of Na2CrO4.4H2O, and the composite material can further contain water, wherein the mass ratio of the composite material to the water is 1:(1-1.3). The invention relates to the phase change heat storage material in thermal energy utilization, reinforcement of heat conduction and reduction of the degreeof supercooling, and particularly controlling of the degree of supercooling of the Na2HPO4.12H2O-based phase change heat storage material, widening of the application scope of the material and improving of the application stability of the material are achieved.

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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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
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