Organic phase change heat storage material and preparation method thereof

A heat storage material and organic phase technology, applied in heat exchange materials, chemical instruments and methods, etc., can solve problems such as oxidation thermal conductivity, etc., and achieve the effects of improving cycle stability, solving stratification, and expanding the scope of application.

Inactive Publication Date: 2021-06-11

强野机械科技(上海)有限公司

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AI-Extracted Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide an organic phase change heat storage material, which is used to solve the problems of easy oxidation and relatively...

Abstract

The invention relates to the technical field of phase change heat storage materials and preparation methods, and especially relates to an organic phase change heat storage material. The organic phase change heat storage material comprises, by weight, 80-97 parts of an organic phase change material, 1-15 parts of an oxidation inhibitor, 1-5 parts of a thickening agent, 1-5 parts of a nucleating agent and 0.1-5 parts of an enhanced heat conduction material. A preparation method of the organic phase change heat storage material comprises the following steps: heating, stirring and melting the organic phase change material, adding the oxidation inhibitor, the thickening agent, the nucleating agent and the enhanced heat-conducting material, and uniformly stirring and mixing to obtain the organic phase change heat storage material. The problems that in the prior art, the organic phase change material serves as an energy storage main body material, oxidation is prone to occurring, and the heat conductivity coefficient is relatively low are solved, the supercooling and phase separation phenomena of the organic material are effectively prevented by selecting proper materials and proportions, and good cycle stability is shown; and the organic phase change heat storage material also has the advantages of strong oxidation resistance and good thermal conductivity.

Application Domain

Heat-exchange elements

Technology Topic

ChemistryThermal conductivity +6

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Examples

Experimental program(4)
Comparison scheme(2)

Example Embodiment

[0041] Example 1

[0042] An organic phase change heat storage material including the following components of the weight fraction: an organic phase change material (92 g of erythritol), oxidative inhibitor (1 g of ethylenediamine tetracetate Sodium), thickener (1 g of konjac powder, 1 g of melan gum), nucleating agent (1 g of calcium fluoride, 1 g of calcium phosphate), enhanced thermal conductive material (3 g of nano alumina).

[0043] A method of preparing the above organic phase change heat storage material, including the following steps:

[0044] Step 1, after the ratio of the above weight is stirred, the heating temperature is 135 ° C, and the addition of the oxidation inhibitor is mixed, and then the thickener is mixed, the stirring rate is 1000R / min, resulting The viscous mixture is for use;

[0045] Step 2, add nucleating agents and enhance the thermally conductive material to the viscous mixture, mix well, stir mixed, and the stirring rate is 2500 r / min, that is, the phase transition storage material is obtained.

[0046] DSC (Differential Heat Scanner) Tested the phase change temperature of the organic phase change heat storage material and the phase change temperature was 118 ° C.

[0047] The above organic phase change heat storage material was subjected to circulating stability test, and its value was 326 kJKG, and the circulation was attenuated by 10%.

[0048] Hot Disk Tested the thermal conductivity of the above organic phase change heat storage material. Under the premise of the other components constant, data is added to the reinforced thermally conductive material and the two sets of thermally conductive coefficients of the heat conductive material, The thermal conductivity of the control group (phase change energy storage material without the reinforced thermally conductive material) was 0.53 W / mK, and the thermal conductivity of the experimental group (phase change energy storage material added to the heat conductive material) was 0.738 W / mK.

Example Embodiment

[0049] Example 2

[0050] An organic phase change heat storage material including the following components of the weight of the weight: organic phase change material (92 g of erythritol), oxidative inhibitor (2g ethylenediamine tetracetate Sodium), thickener (1 g of konjac powder, 1 g of melon), nucleating agent (1 g of calcium fluoride), reinforced thermal material (3 g of nano alumina).

[0051] A method of preparing the above organic phase change heat storage material, including the following steps:

[0052] Step 1, after the ratio of the above weight is stirred, the heating temperature is 135 ° C, and the addition of the oxidation inhibitor is mixed, and then the thickener is mixed, the stirring rate is 1000R / min, resulting The viscous mixture is for use;

[0053] Step 2, add nucleating agents and enhance the thermally conductive material to the viscous mixture, mix well, stir mixed, and the stirring rate is 2500 r / min, that is, the phase transition storage material is obtained.

[0054] DSC (Differential Heat Scanner) Tested the phase change temperature of the organic phase change heat storage material and the phase change temperature was 118 ° C.

[0055] The above organic phase change heat storage material is circulated and stabilized, and its value is 326 kJKG, and the circulating 3500 times storage amount is not attenuated.

[0056] Hot Disk Tested the thermal conductivity of the above organic phase change heat storage material. Under the premise of the other components constant, data is added to the reinforced thermally conductive material and the two sets of thermally conductive coefficients of the heat conductive material, The thermal conductivity of the control group (phase change energy storage material without reinforced thermally conductive material) is 0.55 W / mK, and the thermal conductivity of the experimental group (the phase change energy storage material of the reinforced thermally conductive material) is 1.48W / mK.

Example Embodiment

[0057] Example 3

[0058] An organic phase change heat storage material including the following components of the weight parts: an organic phase change material (92 g of xylitol), oxidative inhibitor (2 g of butyl hydroxylholdernee ether), Thickener (1G konjac powder, 1 g of melan gum), nucleating agent (1 g of calcium fluoride), enhanced thermally conductive materials (3 g of expansion graphite).

[0059] A method of preparing the above organic phase change heat storage material, including the following steps:

[0060] Step 1, after the ratio of the above weight is stirred, the heating temperature is 135 ° C, and the addition of the oxidation inhibitor is mixed, and then the thickener is mixed, the stirring rate is 1000R / min, resulting The viscous mixture is for use;

[0061] Step 2, add nucleating agents and enhance the thermally conductive material to the viscous mixture, mix well, stir mixed, and the stirring rate is 2500 r / min, that is, the phase transition storage material is obtained.

[0062] DSC (Differential Heat Scanner) Tested the phase change temperature of the organic phase change heat storage material and the phase change temperature was 118 ° C.

[0063] The above organic phase change heat storage material was subjected to a circulating stability test, and its value was 323 kJKG, and the circulation was not attenuated with 3500 times.

[0064] Hot Disk Tested the thermal conductivity of the above organic phase change heat storage material. Under the premise of the other components constant, data is added to the reinforced thermally conductive material and the two sets of thermally conductive coefficients of the heat conductive material, The thermal conductivity of the control group (phase change energy storage material without the reinforced thermally conductive material) was 0.53 W / mK, and the thermal conductivity of the experimental group (phase change energy storage material added to the heat conductive material) was 1.352w / mk.

PUM

Property	Measurement	Unit
Phase transition temperature	118.0	°C
Phase transition temperature	101.0	°C
Thermal conductivity	0.55	W·k/m

Description & Claims & Application Information

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AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

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Example Embodiment

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Description & Claims & Application Information

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