Preparation method of high temperature heat storage material for solar photo-thermal power generation

A heat storage material and photothermal power generation technology, which is applied in heat exchange materials, chemical instruments and methods, etc., can solve the problems of limited inorganic salt content, complex process and high cost, and achieve the effect of increasing added value.

Inactive Publication Date: 2012-01-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages: the process is more complicated, the cost is high, and the content of inorganic salt is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Take polyaluminum chloride (Al 2 o 3 The content is 11.19%, the basicity is 43.20) 100mL, heated and stirred until the molten salt is precipitated, the heating temperature is 80°C, and the stirring speed is 55rpm. Increase the stirring intensity to 100 rpm, adjust the temperature to 55° C., continue stirring until a gel appears, stop stirring and cool to form a heat storage material precursor. The precursor is dried in an oven at 90°C for 3 hours, then calcined at 600°C for 3 hours, and cooled to become a heat storage material. The phase change latent heat of the material tested by SDT Q600 synchronous thermal analyzer is 35.5J g -1 , and the phase transition temperatures are 491.9°C and 538.7°C.

Embodiment 2

[0017] Take polyaluminum chloride (Al 2 o 3 The content is 11.59%, the basicity is 45.20) 100mL, heated and stirred until the molten salt is precipitated, the heating temperature is 75°C, and the stirring speed is 60rpm. Increase the stirring intensity to 105rpm, adjust the temperature to 50°C, continue stirring until gel-like, stop stirring and cool to form a heat storage material precursor. The precursor is dried in an oven at 100°C for 2 hours, then calcined at 700°C for 2 hours, and cooled to become a heat storage material. The phase change latent heat of the material tested by SDT Q600 synchronous thermal analyzer is 49.1J g -1 , and the phase transition temperatures are 492.8°C and 534.5°C.

Embodiment 3

[0019] Take polyaluminum chloride (Al 2 o 3 The content is 13.09%, the basicity is 80.00) 100mL, heated and stirred until the molten salt is precipitated, the heating temperature is 70°C, and the stirring speed is 50rpm. Increase the stirring intensity to 100rpm, adjust the temperature to 45°C, continue stirring until a gel appears, stop stirring and cool to form a heat storage material precursor. Put the precursor in an oven at 110°C for 1 hour, then bake it at 800°C for 1 hour, and cool it down to become the heat storage material. The phase change latent heat of the material tested by SDT Q600 synchronous thermal analyzer is 80.7J g -1 , the phase transition temperature is 797.3°C.

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Abstract

The invention discloses a preparation method of a high temperature heat storage material for solar photo-thermal power generation, which comprises the following steps of: with polyaluminum chloride as a main raw material, heating and stirring to dissolve out fused salt and form a precursor of the heat storage material, drying, roasting and cooling to obtain the heat storage material. The latent heat of phase change of the material is 35.5-80.7 J.g-1; and the phase-transition temperature range of the material is 492-797 DEG C. The preparation method of the heat storage material is characterized by simple process, simple and easy available raw materials, in-situ preparation and the like and provides the candidate heat storage material with industrial application potential for the solar photo-thermal power generation.

Description

technical field [0001] The invention relates to a preparation method of a high-temperature heat storage material for solar photothermal power generation. Background technique [0002] With the global energy crisis, a low-carbon society has been advocated by countries all over the world, and renewable energy and energy conservation and emission reduction have become the focus of social attention. Many engineering applications need to store heat and release it when needed, so heat storage technology is very important. Heat storage technology is applied to solar thermal power generation, and the temperature of tower and butterfly solar thermal power generation is 400-800°C, so heat storage materials with high energy storage density and high temperature resistance are required. Molten salt / ceramic matrix composite phase change heat storage materials have large latent heat and high heat storage temperature, and are selected as heat storage materials for solar thermal power gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 杨华明李传常
Owner CENT SOUTH UNIV
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