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Ardealite-based composite phase change energy storage material and preparation method thereof

A phase-change energy storage material and a composite phase-change technology, which are applied in the field of phosphogypsum-based composite phase-change energy storage materials and their preparation, can solve the problems of leakage, low thermal conductivity of materials, etc., and achieve low cost and simple and easy production process. , the effect of easy large-scale production

Active Publication Date: 2021-12-28
GUIZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Method 3 Since only phosphogypsum boards are combined with end plugs for packaging, the thermal conductivity of the material is low and there is also a risk of leakage

Method used

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  • Ardealite-based composite phase change energy storage material and preparation method thereof
  • Ardealite-based composite phase change energy storage material and preparation method thereof
  • Ardealite-based composite phase change energy storage material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] After uniformly mixing 33.3wt% hemihydrate phosphogypsum powder with 66.6wt% water, continue to pass air into the phosphogypsum fluid to disturb the fluid at a flow rate of 0.03L / min, pour it into the mold after slightly disturbing for 1min, and place- Freeze at 10°C for 12h. Then place it in a vacuum oven at -2.5Mpa and dry at 80°C to constant weight to obtain a porous phosphogypsum material.

[0046] Fully melt the polyethylene glycol phase-change energy storage material at 70°C, put the porous phosphogypsum material prepared above into the melted polyethylene glycol, and soak it in a vacuum environment of -2.5Mpa for 2 to 5 hours to make the polyethylene glycol The diol fully fills the pores in the porous phosphogypsum to obtain the phosphogypsum-based composite phase change energy storage material. The relevant structure and performance parameters are shown in Table 1.

Embodiment 2

[0048] After mixing 20wt% hemihydrate phosphogypsum powder with 80wt% water evenly, continuously pass air disturbance fluid into the phosphogypsum fluid at a flow rate of 0.03L / min, pour it into the mold after slight disturbance for 1min, and place it at -10°C Freeze for 12 hours. Then place it in a vacuum oven at -2.5Mpa and dry at 80°C to constant weight to obtain a porous phosphogypsum material.

[0049] Fully melt the polyethylene glycol phase-change energy storage material at 70°C, put the porous phosphogypsum material prepared above into the melted polyethylene glycol, and soak it in a vacuum environment of -2.5Mpa for 2 to 5 hours to make the polyethylene glycol The diol fully fills the pores in the porous phosphogypsum to obtain the phosphogypsum-based composite phase change energy storage material. The relevant structure and performance parameters are shown in Table 1.

Embodiment 3

[0051] After mixing 20wt% hemihydrate phosphogypsum powder with 80wt% water evenly, continuously pass air disturbance fluid into the phosphogypsum fluid at a flow rate of 0.03L / min, pour it into the mold after slight disturbance for 11min, and place it at -10°C Freeze for 12 hours. Then place it in a vacuum oven at -2.5Mpa and dry at 80°C to constant weight to obtain a porous phosphogypsum material.

[0052] Fully melt the polyethylene glycol phase-change energy storage material at 70°C, put the porous phosphogypsum material prepared above into the melted polyethylene glycol, and soak it in a vacuum environment of -2.5Mpa for 2 to 5 hours to make the polyethylene glycol The diol fully fills the pores in the porous phosphogypsum to obtain the phosphogypsum-based composite phase change energy storage material. The relevant structure and performance parameters are shown in Table 1.

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Abstract

The invention provides an ardealite-based composite phase change energy storage material and a preparation method thereof in order to solve problems in resource utilization of the solid waste ardealite and defects in the field of phase change energy storage. According to the ardealite-based composite phase change energy storage material, a heat-conducting porous ardealite material is used as a support, expanded graphite is used as a heat-conducting filler, and the heat-conducting porous ardealite-encapsulated phase change energy storage material is prepared according to a certain ratio by combining a micro-perturbation technology and vacuum drying, so the phase change energy storage material has high phase change energy storage material encapsulation capacity and high heat conductivity, wherein the encapsulation capacity can reach 83%, and the heat conductivity can reach 0.505 W / (m.K). In addition, the production process of the ardealite-based composite phase change energy storage material provided by the invention is simple and easy to implement, low in cost and easy for large-scale production, and has important practical significance.

Description

technical field [0001] The invention belongs to the field of solid waste utilization and energy storage materials, in particular to a phosphogypsum-based composite phase change energy storage material and a preparation method thereof. Background technique [0002] Phosphogypsum is phosphogypsum, which is a solid waste discharged from the production of phosphate fertilizer and phosphoric acid. Its main component is calcium sulfate dihydrate. For every ton of phosphoric acid produced, about 4 tons of phosphogypsum will be produced by-product, and the current total reserves of phosphogypsum in Guizhou Province alone have exceeded 100 million tons. Due to the complex composition of phosphogypsum, in addition to calcium sulfate, there are incompletely decomposed phosphate rock, residual phosphoric acid, fluoride, acid insoluble matter, organic matter, etc., so the resource utilization of phosphogypsum is difficult. The effective utilization rate of phosphogypsum in the world is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
CPCC09K5/063Y02E60/14
Inventor 罗大军施启富王浩黄文旭罗超代松张学亮刘仪柯
Owner GUIZHOU INST OF TECH
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