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Phasochange energy storage ceramic particle and its preparation method

A phase change energy storage, ceramsite technology, applied in chemical instruments and methods, heat exchange materials and other directions, can solve the problems of high cost and easy leakage of phase change materials, achieve low cost, increase the heat efficiency of phase change, and the preparation process. simple effect

Inactive Publication Date: 2004-02-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The advantage of this method is that the cost is relatively low, but there are still problems such as easy leakage of phase change substances during use and storage reliability.
In current solar buildings, concrete and pebbles are still the main way to store thermal energy in the form of sensible heat. Although the energy storage density of sensible heat storage is not high and the volume is large, it has the advantages of low cost and long-term stable energy storage performance. Therefore, in order to replace the position of sensible heat storage in the construction field, phase change latent heat energy storage technology must simultaneously solve the two problems of high cost and durability (that is, the storage reliability of phase change materials)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The expanded clay ceramsite with a porosity of 75.6% is used to store the organic phase change material. The maximum particle size of the ceramsite is 20mm, and the shape is approximately spherical. Paraffin (alkane mixture) with a melting point of 45° C. and a phase transition enthalpy of 200 J / g was selected as the organic phase transition substance. The parameters of the vacuum impregnation are: the vacuuming time is 30 minutes, the vacuum pressure is 88.5kPa, and the soaking time is 30 minutes. The storage capacity of the organic phase change material in the ceramsite is about 65% (volume ratio). The sealing film layer is a composite material composed of epoxy resin and aluminum powder, the volume content of the aluminum powder is 2%, and the content of organic phase change substances in the phase change energy storage ceramsite after adding the sealing layer is about 63.5%. The phase change temperature of phase change energy storage ceramsite is 47.5°C, and the ph...

Embodiment 2

[0014] The expanded clay with a porosity of 73.3% is used to store the organic phase change material. The maximum particle size of the clay is 3mm and the shape is ellipsoid. Paraffin (alkane mixture) with a melting point of 45° C. and a phase transition enthalpy of 200 J / g was selected as the organic phase transition substance. The parameters of the vacuum impregnation are: the vacuuming time is 30 minutes, the vacuum pressure is 88.5kPa, and the soaking time is 30 minutes. The storage capacity of organic phase change substances in ceramsite is 60%. The material of the sealing film layer is made of hardened pure polymer emulsion-based composite material, and the emulsion is made of commercial styrene-butadiene rubber emulsion, and 2% aluminum powder is added by volume. The content of organic phase-change substances in the phase-change energy-storage ceramsite after adding the sealing film layer is 59.1%. The phase change temperature of phase change energy storage ceramsite ...

Embodiment 3

[0016] The expanded clay ceramsite with a porosity of 75.6% is used to store the organic phase change material. The maximum particle size of the ceramsite is 20mm, and the shape is approximately spherical. Butyl stearate with a melting point of 22° C. and a phase change enthalpy of 128.5 J / g was selected as the organic phase change substance. The parameters of vacuum impregnation are: the vacuuming time is 30 minutes, the vacuum pressure is 88.5kPa, and the soaking time is 35 minutes. The storage capacity of organic phase change substances in ceramsite is 67.5%. The sealing film layer adopts a composite material composed of epoxy resin and aluminum powder, and the volume content of the aluminum powder is 2%. The content of organic phase-change substances in the phase-change energy storage ceramsite after adding the sealing layer is 65.7%. The phase change temperature of phase change energy storage ceramsite is 23.1°C, and the phase change energy storage density is 44.8MJ / m ...

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Abstract

An energy-accumulating phase-change haydite is composed of light-weight porous haydite, organic phase-change substance adsorbed by said porous haydite and polymer-base composite coated on the surfaceof said porous hay dite. Its preparing process includes vacuum osmosis to make haydite adsorb the phase-change substance and soaking in polymer-base composite. Its advantages are high heat-exchangingefficiency during phase change, and low cost.

Description

technical field [0001] The invention relates to a phase change energy storage material, in particular to a phase change energy storage ceramsite and a preparation method thereof. Background technique [0002] Energy storage refers to the storage of energy at one time and one place in a certain form to meet the energy demand at other times and (or) places. The use of renewable energy has important value. In building heating and cooling, energy is used in the form of heat, so storing heat in these areas is more efficient than storing other forms of energy. According to the energy storage temperature, thermal energy storage technology can be divided into low-temperature energy storage and high-temperature energy storage. According to the energy storage mechanism, it can also be divided into sensible heat energy storage and latent heat energy storage. Compared with sensible heat energy storage, latent heat energy storage has the advantages of high energy storage density (one ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/02
Inventor 张东吴科如
Owner TONGJI UNIV
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