A pcm energy storage structure that can increase the crystallization speed of phase change energy storage materials

A technology of phase change energy storage and crystallization speed, applied in heat storage equipment, lighting and heating equipment, indirect heat exchangers, etc., can solve the problems of slow nucleation speed of crystal nuclei and poor heat storage performance, and achieve improved heat storage performance, increase the area, and avoid the effect of area reduction

Active Publication Date: 2022-04-05
珠海保能绿色能源科技有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a PCM energy storage structure that can increase the crystallization speed of phase change energy storage materials, so as to solve the problem of poor heat storage performance of the existing PCM energy storage structure due to the slow nucleation speed of crystal nuclei

Method used

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  • A pcm energy storage structure that can increase the crystallization speed of phase change energy storage materials

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Embodiment 1

[0030] Such as figure 1 As shown, the present invention discloses a PCM energy storage structure capable of increasing the crystallization speed of phase change energy storage materials, which is provided with a sealed container 1 and a phase change energy storage material 2 stored in the sealed container 1. The phase change energy storage material 2 exchanges heat with the outside through the sealed container 1 .

[0031] The PCM energy storage structure is also provided with a plurality of crystal auxiliary cores 3 placed in the phase change energy storage material 2; the specific gravity of the crystal auxiliary core 3 is the same as that of the phase change energy storage material 2 in a liquid state The difference in specific gravity is within ±10%, the crystal auxiliary core 3 is made of a non-phase-change energy storage material, and the non-phase-change energy storage material satisfies the following characteristics: the thermal conductivity of the non-phase-change ene...

Embodiment 2

[0041] On the basis of the first embodiment above, the second embodiment also adopts the following preferred structure:

[0042] The auxiliary crystallization core 3 is provided with openings. Opening holes can be realized by a drilling machine, so that the area of ​​non-uniform nucleation on the crystallization auxiliary core 3 can be further increased.

Embodiment 3

[0044] On the basis of the above-mentioned embodiment 1 or embodiment 2, this embodiment 3 also adopts the following preferred structure:

[0045] The crystallization auxiliary core 3 is made of a single non-phase-change energy storage material, the specific gravity of the single non-phase-change energy storage material is higher than that of the phase-change energy storage material 2 in a liquid state, and the crystallization auxiliary core 3 is provided with openings to reduce the specific gravity of the crystal auxiliary core 3 as a whole, so that the crystal auxiliary core 3 can be suspended in the liquid phase change energy storage material 2 .

[0046] Among them, preferably: the single non-phase-change energy storage material used in the auxiliary crystallization core 3 is cement.

[0047] Among them, preferably: the crystallization auxiliary core 3 is a cement sphere made of cement through a cement pelletizer. Therefore, the implementation of the present invention can...

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Abstract

The invention discloses a PCM energy storage structure capable of increasing the crystallization speed of a phase change energy storage material. It is provided with a sealed container and a phase change energy storage material stored in the sealed container. The phase change energy storage material is exchanged with the outside through the sealed container. heat; there are also multiple crystallization auxiliary cores placed in the phase change energy storage material; the specific gravity of the crystallization auxiliary core is within ±10% of the specific gravity of the phase change energy storage material in the liquid state, and the crystallization auxiliary core is composed of non-phase change energy storage material, and: the thermal conductivity of the non-phase change energy storage material is higher than the thermal conductivity of the phase change energy storage material in the liquid state, the non-phase change energy storage material and the phase change energy storage material in the liquid state When the contact angle is below 90°, the melting point of the non-phase-change energy storage material is higher than that of the phase-change energy storage material in a solid state. The invention can increase the crystal nucleus nucleation speed of the phase change energy storage material when exothermic, so that the phase change energy storage material can be solidified from liquid state to solid state more quickly, and the heat storage performance of the PCM energy storage structure is improved.

Description

technical field [0001] The invention relates to a PCM energy storage structure capable of increasing the crystallization speed of phase change energy storage materials. Background technique [0002] Inorganic hydrated salt is a phase change material (Phase Change Materials, PCM for short) widely used in medium and low temperature at present, and it has been applied in solar room heating system, household appliances and other fields. Inorganic hydrated salt phase change materials use the characteristics of absorbing or releasing latent heat during the solid-liquid phase change process of melting or solidifying inorganic hydrated salts to store and release heat. Its main advantages are: 1. The latent heat of solid-liquid phase transition of inorganic hydrated salt is much greater than its sensible heat, so less heat storage medium is required to store the same heat; 2. Heat storage and heat release can be carried out at a constant temperature. [0003] The PCM energy storage ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D20/02
CPCF28D20/021F28D20/025Y02E60/14
Inventor 柳一曼寇翠青柳国伟
Owner 珠海保能绿色能源科技有限公司
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