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Porous composite organic phase change heat-storing material and preparation method thereof

A heat storage material and phase change heat storage technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of unfavorable recovery, high reaction requirements, complicated preparation process, etc. Simple, thermally stable effect

Inactive Publication Date: 2012-06-13
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the preparation process of metal materials as packaging carriers is complicated, the reaction requirements are high, and it is not conducive to recycling, so it is not suitable as the preferred packaging carrier

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] First mix n-octadecane and n-eicosane in a mass ratio of 3:7, heat to a molten state, maintain the temperature at 50°C, and stir at 600r / min for 30-60 minutes to make a uniform organic heat storage material Liquid eutectic mixture.

[0015] Then the liquid mixture was mixed with 13X molecular sieve at a ratio of 1:5, stirred at 600r / min for 100 minutes, and dried at 27°C for 100 minutes to obtain a porous composite organic phase change thermal storage material. It has been determined that the solidification temperature of the composite phase change thermal storage material is 34.7°C, the melting temperature is 35.9°C, the solidification latent heat is 35.8kJ / kg, and the melting latent heat is 38.6kJ / kg.

Embodiment 2

[0017] First mix n-octadecane and n-eicosane at a mass ratio of 7:3, heat to a molten state, maintain the temperature at 50°C, and stir at 600r / min for 30-60 minutes to make a uniform organic heat storage material Liquid eutectic mixture.

[0018] Then the liquid mixture was mixed with 4A molecular sieve at a ratio of 1:3, stirred at 600r / min for 100 minutes, and dried at 27°C for 100 minutes to obtain a porous composite organic phase change thermal storage material. It has been determined that the solidification temperature of the composite phase change heat storage material is 27.8°C, the melting temperature is 28.9°C, the solidification latent heat is 56.8kJ / kg, and the melting latent heat is 59.4kJ / kg.

Embodiment 3

[0020] First mix n-octadecane and n-eicosane at a mass ratio of 5:5, heat to a molten state, maintain the temperature at 50°C, and stir at 600r / min for 30-60 minutes to make a uniform organic heat storage material Liquid eutectic mixture.

[0021] Then the liquid mixture was mixed with 5A molecular sieve at a ratio of 1:1, stirred at 600r / min for 100 minutes, and dried at 27°C for 100 minutes to obtain a porous composite organic phase change thermal storage material. It has been determined that the solidification temperature of the composite phase change heat storage material is 32.9°C, the melting temperature is 33.8°C, the solidification latent heat is 115.8kJ / kg, and the melting latent heat is 117.3kJ / kg.

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Abstract

The invention discloses a porous composite organic phase change heat-storing material and a preparation method thereof, belonging to the field of energy materials. The phase change heat-storing material is a combination of n-octadecane and n-eicosane; a molecular sieve is taken as a carrier; the mass ratio of the phase change heat-storing material to the molecular sieve is 1:(1-5); and the mass ratio of the n-octadecane to the n-eicosane is 3:7-7:3. The invention further discloses a preparation method of the phase change heat-storing material. High-stability alkane is taken as the phase change heat-storing material, and the upper and lower limits of a phase change temperature are adjusted by combining the n-octadecane with the n-eicosane, so that the requirement of the phase change heat-storing material for an outer wall body of a building is met; moreover, the phase change heat-storing material is non-corrosive, and is prevented from being overcooled; and the molecular sieve is taken as a carrier, so that the problem of permeation of the phase change heat-storing material during heat absorption melting is solved, and the overall heat stability is enhanced.

Description

technical field [0001] The invention relates to the field of energy materials applied to building exterior walls, in particular to a porous composite organic phase-change thermal storage material and a preparation method thereof. Background technique [0002] The temperature of a certain material rises after absorbing heat energy, that is, it uses the temperature difference to store heat as a sensible heat storage material. The material undergoes phase change after absorbing heat energy but the temperature remains the same or the temperature changes very little is the latent heat storage material. The heat storage capacity of materials using phase change energy storage is far greater than that of sensible heat storage materials, and it has the characteristics of constant temperature absorption and heat release. During the process of its own phase change, the phase change heat storage material absorbs the heat of the environment and releases heat to the environment when need...

Claims

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Application Information

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IPC IPC(8): C09K5/06
Inventor 方贵银陈智曹磊单锋
Owner NANJING UNIV
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