CN103571438A - Organic composite phase change material for water tank heat storage - Google Patents
Organic composite phase change material for water tank heat storage Download PDFInfo
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- CN103571438A CN103571438A CN201210265416.7A CN201210265416A CN103571438A CN 103571438 A CN103571438 A CN 103571438A CN 201210265416 A CN201210265416 A CN 201210265416A CN 103571438 A CN103571438 A CN 103571438A
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- phase change
- change material
- water tank
- heat storage
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Abstract
An organic composite phase change material for water tank heat storage is provided. The composite phase change material is composed of myristic acid and expanded graphite, and a preparation method of the composite phase change material comprises the following steps: carrying out a low-temperature expanding treatment on 80-mesh expandable graphite in a microwave oven to obtain expanded graphite, and then making the expanded graphite absorb myristic acid with a purity of 99% in a vacuum drying cabinet at the temperature of 80 DEG C and under the pressure of minus 0.1 Mpa for 24 hours, wherein the mass ratio of myristic acid to expanded graphite is 18:1. The phase change temperature of the composite phase change material is 53.19 DEG C, the latent heat of phase change is 191.75 J/g, and the heat conductivity coefficient is 2.10 W/(m.K). The composite phase change material has the advantages of proper phase change temperature, large latent heat of phase change, small supercooling degree, good chemical stability, and high coefficients of phase change moulding and heat conductivity. The phase change material is applied to a water tank heat storage system to increase the heat storage intensity of the water tank, so that the volume of the water tank is decreased while the heat storage amount is not changed, and thus the space is saved.
Description
Affiliated technical field:
The present invention relates to a kind of organic composite phase change material that can be used for water tank accumulation of heat.
Background technology:
At present, in water tank accumulation of heat, water because cost is low, stable performance, good fluidity, specific heat be large etc., and factor becomes main heat storage medium.But utilize water to have a shortcoming as heat storage medium: water accumulation of heat belongs to sensible heat accumulation of heat, and thermal storage density is little, and heat storage capacity is limited, and the volume of hot water storage tank is larger in the situation that heat storage capacity is larger, takes up room larger.In water tank, add composite phase-change material as the thermal storage unit of heat storage medium, utilize the latent-heat storage of phase change material, increase water tank thermal storage density, in the situation that heat storage capacity is certain, can effectively reduce water tank volume, save space.
Summary of the invention:
For solving hot water storage tank, only utilize sensible heat accumulation of heat, and cause the limited defect of heat storage capacity in given volume situation, the present invention develops the interior organic composite phase change material as heat storage medium of a kind of water tank.The transformation temperature of this material is 53.19 ℃, and latent heat of phase change is 191.75J/g, and thermal conductivity is 2.10W/ (mK), and condensate depression is low, and heat transfer property is good, and without phenomenon of phase separation, and phase transition process is reversible.
Embodiment:
The parent of organism tetradecanoic acid as heat accumulating phase change material usingd in the present invention, using expansible black lead be prepared into have enrich pore texture expanded graphite as support substrate, utilize the adsorptivity absorption tetradecanoic acid that expansible black lead is stronger, be prepared into tetradecanoic acid/expanded graphite organic composite phase change material.Specific embodiments is: 80 object expansible black leads low temperature expanding 30s in microwave oven is prepared to expanded graphite, expanded graphite is placed in container, on expanded graphite uniformly paving to spill purity be 99% tetradecanoic acid, wherein the quality proportioning of expanded graphite and tetradecanoic acid is 1: 18, then beaker is placed in to 80 ℃, 24h in the vacuum drying oven of-0.1Mpa, every 8h, taking out concussion therebetween once makes it more evenly adsorb, thereby prepare tetradecanoic acid/expanded graphite composite phase-changing material, the transformation temperature of tetradecanoic acid/expanded graphite composite phase-changing material is 53.19 ℃, latent heat of phase change is 191.75J/g, thermal conductivity is 2.10W/ (mK).
Beneficial effect:
Adopt that composite phase-change material prepared by the method has advantages of that transformation temperature is suitable, latent heat of phase change is large, condensate depression is little, chemical stability is good, phase transformation sizing and thermal conductivity high.Be applied to water tank hold over system, improved water tank thermal storage density, the in the situation that of certain heat storage capacity, reduced water tank volume, saved space.
Claims (1)
1. an organic composite phase change material that can be used for water tank accumulation of heat, its characteristic is: by 80 object expansible black leads, low temperature expanding 30s in microwave oven obtains expanded graphite, then by expanded graphite at 80 ℃, in the vacuum drying oven of-0.1Mpa, absorb purity and be 99% tetradecanoic acid 24h, wherein the mass ratio of tetradecanoic acid and expanded graphite is 18: 1, the transformation temperature of this composite phase-change material is 53.19 ℃, and latent heat of phase change is 191.75J/g, and thermal conductivity is 2.10W/ (mK).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210265416.7A CN103571438A (en) | 2012-07-30 | 2012-07-30 | Organic composite phase change material for water tank heat storage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210265416.7A CN103571438A (en) | 2012-07-30 | 2012-07-30 | Organic composite phase change material for water tank heat storage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103571438A true CN103571438A (en) | 2014-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210265416.7A Pending CN103571438A (en) | 2012-07-30 | 2012-07-30 | Organic composite phase change material for water tank heat storage |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464067A (en) * | 2013-08-07 | 2013-12-25 | 苏州伟纳节能科技有限公司 | Assembly line apparatus for preparing phase change energy storage microcapsules |
| CN103992772A (en) * | 2014-05-23 | 2014-08-20 | 西南交通大学 | Composite phase change energy storage material and preparation method thereof |
| CN106590537A (en) * | 2015-10-20 | 2017-04-26 | 北京林业大学 | Solar energy drying phase change heat storage material and preparation method thereof |
| CN109489278A (en) * | 2018-11-22 | 2019-03-19 | 湖南省农村科技发展中心 | Grapheme foam/paraffin wax phase change energy storage material production solar water heater water tank |
-
2012
- 2012-07-30 CN CN201210265416.7A patent/CN103571438A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103464067A (en) * | 2013-08-07 | 2013-12-25 | 苏州伟纳节能科技有限公司 | Assembly line apparatus for preparing phase change energy storage microcapsules |
| CN103464067B (en) * | 2013-08-07 | 2015-08-05 | 苏州伟纳节能科技有限公司 | A kind of flow-line equipment preparing phase-changing energy-storing microcapsules |
| CN103992772A (en) * | 2014-05-23 | 2014-08-20 | 西南交通大学 | Composite phase change energy storage material and preparation method thereof |
| CN106590537A (en) * | 2015-10-20 | 2017-04-26 | 北京林业大学 | Solar energy drying phase change heat storage material and preparation method thereof |
| CN109489278A (en) * | 2018-11-22 | 2019-03-19 | 湖南省农村科技发展中心 | Grapheme foam/paraffin wax phase change energy storage material production solar water heater water tank |
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Application publication date: 20140212 |