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An environmentally friendly phase change energy storage device

A technology of phase change energy storage and composite phase change materials, which is applied in the field of phase change energy storage composite materials, can solve the problems of low heat exchange efficiency, affecting heat exchange efficiency, and small heat exchange area of ​​phase change energy storage devices, and achieves The effect of short thermal cycle, high heat transfer efficiency, and easy large-scale industrial continuous production

Active Publication Date: 2017-11-24
中关村人居环境工程与材料研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the heat exchange area of ​​the phase change energy storage device is small, and the heat exchange efficiency is low. Moreover, it exchanges heat with the metal through the phase change material, and then the metal exchanges heat with the adjustment object (such as air, electronic components, etc.). affect the heat transfer efficiency

Method used

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  • An environmentally friendly phase change energy storage device

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Effect test

Embodiment 1

[0046] A phase-change energy storage device is composed of a hollow cylinder and three sector bodies, wherein the hollow cylinder and the sector bodies are movably connected.

[0047] Holes are evenly distributed on both sides of the sector body, and the movable connection is a bolt connection.

[0048] The invention increases the heat exchange area of ​​the energy storage device by dividing it into three sectors and a hollow cylinder, which is beneficial to improve the heat exchange efficiency. The two sides of the fan-shaped body of the heat storage device of the present invention are provided with certain holes, and while having the current general heat exchange mode, the gas can also directly enter the heat storage device to provide a direct heat exchange method between the gas and the phase change material. Thereby further improving the heat exchange efficiency. The present invention adopts the movable connection mode, which is easy to produce, process, construct and ins...

Embodiment 2

[0050] A phase-change energy storage device has a hollow cylinder structure, and holes are evenly distributed on the inner side wall of the hollow cylinder.

[0051] The present invention adopts the geometric structure of a hollow cylinder, which increases the heat exchange area compared to a solid cylinder / rod. There are holes of a certain size on the inner side wall. While having the current general heat exchange mode, the gas can also directly enter the heat storage device to provide a direct heat exchange method between the gas and the phase change material, thereby further improving the heat exchange efficiency. .

Embodiment 3

[0053] An environment-friendly composite phase change material, the modified paraffin mixture is coated in the micropores of expanded graphite, the modified paraffin mixture contains a flame retardant, and the modified paraffin mixture accounts for 30% by mass of the composite phase change material , the flame retardant accounts for 20% of the modified paraffin mixture, the temperature adjustment range of the composite phase change material is 25-45 ℃, the phase change enthalpy is 113J / g, the burning time is 286s, and the thermal conductivity is 1.12W / m.K.

[0054] The paraffin is a chlorine-based emulsified paraffin.

[0055] A preparation method of an environment-friendly composite phase change material, the method comprises the following steps:

[0056] (1) The acidified graphite particles are placed in a microwave oven of 800W and expanded for 8s to prepare expanded graphite;

[0057] (2) adsorbing the expanded graphite prepared in step (1) and chlorine-based flame-retard...

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Abstract

The invention provides an environment-friendly composite phase change material and a phase change energy storage device. Micropores of expanded graphite are coated with modified paraffin mixtures which contain fire retardants, wherein the weight percentage of organic matters is 30%-90%, the paraffin phase change temperature ranges from 25 DEG C to 45 DEG C, the phase change enthalpy is larger than 100 J / g, and the heat conductivity coefficient is 1.12-8.37 W / m*k; and the phase change energy storage device comprises a hollow cylinder and three fan-shaped bodies which are movably connected. The prepared composite phase change material adopts a shaped phase change material, has higher fire resistance property and phase change temperature adjustment property and can be easily processed into a decoration building material, and a comfortable and healthy indoor living environment can be created. The phase change energy storage device is attractive and high in heat transfer efficiency, facilitates large-scale industrial continuous production and has the advantages of energy storage, short heat release period, small phase change material loss and the like.

Description

technical field [0001] The invention relates to a phase-change energy storage composite material, which can be used for indoor energy storage decoration materials, especially suitable for indoor temperature regulation (25-45° C.) to create a comfortable living environment. The invention also relates to the phase-change composite material. Material preparation method and energy storage device thereof. Background technique [0002] The phase change energy storage material has a high energy storage density, a wide selection range of phase change temperature, constant temperature control, and remarkable energy saving effect. Selecting suitable phase change energy storage materials and applying them to building materials can not only reduce the volume of building materials that store the same heat, but also control the indoor temperature fluctuations in a very narrow range, thereby greatly improving the comfort of the living environment. [0003] At present, there are many studi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/06F28D20/02
CPCC09K5/063F28D20/023Y02E60/14Y02P20/10
Inventor 赵金平冯小江
Owner 中关村人居环境工程与材料研究院
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