High-latent-heat medium-temperature composite phase change material based on nano heat conduction enhancement and preparation method of high-latent-heat medium-temperature composite phase change material

A technology of composite phase change material and thermal conductivity enhancement, which is applied in heat exchange materials, chemical instruments and methods, shape preparation of alkali metal carbonate, etc., can solve the problems of low heat storage density and heat storage efficiency, and achieve heat absorption and release Fast speed, stable performance, and the effect of overcoming the cumbersome preparation method

Pending Publication Date: 2022-03-15
南京金合能源材料有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a high-latent-heat medium-temperature composite phase change material based on nano-scale heat conduction enhancement and a preparation method thereof. Through the theoretical calculation-phase diagram calculation method, a new eutectic salt system can be accurately designed and developed, and the cost of eutectic salt design and preparation can be reduced. Moreover, the prepared phase change material overcomes the problems of low heat storage density and low heat storage efficiency in the phase change heat storage materials existing in the prior art.

Method used

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  • High-latent-heat medium-temperature composite phase change material based on nano heat conduction enhancement and preparation method of high-latent-heat medium-temperature composite phase change material

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Experimental program
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Effect test

Embodiment 1

[0036] Based on the enhanced high latent heat conductive nano avid temperature phase change composite material preparation method, is calculated by the phase diagram, and ultrasonic vibration high temperature melting eutectic salt Preparation of Nano composite phase change material, comprises the steps of:

[0037] Step 1: Eucalyptus Salt Section Determination

[0038] LiF at high latent heat modified carbonate salts Na 2 CO 3 -Li 2 CO 3 System, to achieve effective control of the phase change system and raising the temperature of the latent heat;

[0039] Step 2: Component calculation

[0040] The Na component in each end of the inter- 2 CO 3LI 2 CO 3 , LIF's crystal characteristics and thermodynamic parameters, select Factsage's Phase Diagram module, select the FT-DEMO database, enter the three-component component to be calculated, set the temperature, pressure, quality parameters, product and solution phase, select pure The phase component and solid-liquid deposition phase are ...

Embodiment 2

[0052] A method of preparing a high-temperature medium temperature composite phase change material based on nanomatic heat enhancement, including the following steps:

[0053] Step 1: Eucalyptus Salt Section Determination

[0054] Metallic carbonate NA with high latent heat inorganic salt LIF 2 CO 3 -Li 2 CO 3 System, effective regulation of system phase transition temperature and the increase in latent heat;

[0055] Step 2: Component calculation

[0056] According to each end of the component NA 2 CO 3 LI 2 CO 3 , LIF's crystal characteristics and thermodynamic parameters, select Factsage's Phase Diagram module, select the FT-DEMO database, enter the three-component component to be calculated, set the temperature, pressure, quality parameters, product and solution phase, select pure The phase component and solid-liquid deposition phase are calculated for phase diagram of the triplet, which is constantly optimizing the interaction parameters of each phase by means of phase diagra...

Embodiment 3

[0068] A method of preparing a high-temperature medium temperature composite phase change material based on nanomatic heat enhancement, including the following steps:

[0069] Step 1: Eucalyptus Salt Section Determination

[0070] Metallic carbonate NA with high latent heat inorganic salt LIF 2 CO 3 -Li 2 CO 3 The system, the effective regulation of the temperature of the system phase transition and the increase in latent heat.

[0071] Step 2: Component calculation

[0072] According to each end of the component NA 2 CO 3 LI 2 CO 3 , LIF's crystal characteristics and thermodynamic parameters, select Factsage's Phase Diagram module, select the FT-DEMO database, enter the three-component component to be calculated, set the temperature, pressure, quality parameters, product and solution phase, select pure The phase component and solid-liquid deposition phase are calculated for phase diagram of the triplet, which is constantly optimizing the interaction parameters of each phase by me...

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Abstract

The invention discloses a high-latent-heat medium-temperature composite phase change material based on nano heat conduction enhancement and a preparation method thereof, and belongs to the field of phase change heat storage materials. A novel eutectic salt system is designed and developed through a theoretical calculation-phase diagram calculation method, villiaumite with high latent heat and carbonate are compounded with high-latent-heat multi-element eutectic salt, and nano AlN with high heat conductivity and light weight is used as a heat conduction reinforcing material, and a solid nano layer on the surface of a nano-particle medium can reinforce the heat conduction performance of the eutectic salt. The method overcomes the defects that a traditional trial-and-error method-preparation method is tedious, low in efficiency and the like, and the design and preparation cost of the eutectic salt is reduced; and the prepared phase change material overcomes the problems of low heat storage density, low heat storage efficiency and the like of the phase change heat storage material in the prior art.

Description

Technical field [0001] The present invention is in the field of phase change thermal storage materials, particularly to a thermally-based nano-enhanced high temperature latent avid composite phase change material and its preparation method. Background technique [0002] With the development of society, traditional energy sources are depleted, so the development of new energy sources, improving energy efficiency has become the focus of growing concern. However, clean energy sources such as solar and other affected by the weather, geography greater impact, there is instability and intermittent shortcomings, its use is limited in space and time. Therefore, well-developed thermal storage technology is the efficient use of clean energy prerequisite. Thermal energy storage technology comprises a sensible heat storage, phase change thermal storage, thermal chemical heat storage. Wherein the phase change thermal storage compared with the other two heat storage heat storage mode having a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06C01D7/38C01D15/04C01D15/08
CPCC09K5/063C01D7/38C01D15/08C01D15/04C01P2002/88C01P2006/32
Inventor 李伟伟金翼谈玲华张叶龙苗琪丁宏亮杨飒王雪梦来源
Owner 南京金合能源材料有限公司
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