CN102757766A - Low-temperature phase change thermal storage material and preparation method thereof - Google Patents
Low-temperature phase change thermal storage material and preparation method thereof Download PDFInfo
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- CN102757766A CN102757766A CN2012102586013A CN201210258601A CN102757766A CN 102757766 A CN102757766 A CN 102757766A CN 2012102586013 A CN2012102586013 A CN 2012102586013A CN 201210258601 A CN201210258601 A CN 201210258601A CN 102757766 A CN102757766 A CN 102757766A
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Abstract
The invention provides a low-temperature phase change thermal storage material and a preparation method thereof. The low-temperature phase change thermal storage material comprises the following components by weight: 96-98% of sodium acetate trihydrate, 1-2% of sodium pyrophosphate decahydrate and 1-2% of polyacrylamide. The preparation method comprises the following steps: weighed sodium acetate trihydrate is heated in a reaction kettle to 68.5-71 DEG C; weighed sodium pyrophosphate decahydrate and polyacrylamide are sequentially added in the reaction kettle after the sodium acetate trihydrate is completely melted; stirring and mixing are performed at the same time; the mixture at 68.5-71 DEG C is filled into a container after being stirred fully and uniformly, with the volume dose of the mixture filled into the container being 88-90% of the volume of the container; and the container is sealed after the liquid mixture is cooled to be at room temperature. The invention has the advantages that fewer additives are added; the material is high in stability and phase change latent heat and moderate in crystallization temperature, and doesn't exceed 2 DEG C in degree of supercooling; the phase change thermal storage material is a gelatiniform liquid when melted, so as to avoid a phase separation phenomenon; the preparation process is simple, and the encapsulation is easy; and the production is convenient.
Description
Technical field
The present invention relates to a kind of heat-storing material that is used for low temperature phase change and preparation method thereof, belong to the heat-storing material technical field.
Background technology
Use heat storage technology and not only can regulate the energy imbalance between supply and demand, realize " peak load shifting " of EPS, the equilibrium energy system can also make full use of industrial exhaust heat, used heat, improves capacity usage ratio, reduces production costs.Accumulation of heat can solve the energy dissipation problem that not matching on time and space brought between the heat energy supply and demand.At present, heat storage technology mainly contains sensible heat accumulation of heat, phase-transition heat-storage and three kinds of modes of reversible chemical reaction accumulation of heat; Compare with all the other two kinds of heat storage types; Phase-transition heat-storage has advantages such as thermal storage density is big, the accumulation of heat volume is little, exothermic temperature is stable; Therefore phase-transition heat-storage has received people's extensive attention, and the phase-transition heat-storage technology has been widely used in fields such as sun power utilization, industrial waste heat utilization, energy-saving and environmental protection, air-conditioning, heat supply.
Inorganic hydrated salt is as material for storing heat of phase change in low temperature commonly used; Have that thermal storage density is big, good heat conductivity (comparing), nontoxicity, non-corrosiveness with the organic phase-change heat-storing material, and be chemical by-product, advantage such as cheap and easy to get mostly, be prone to produce problems such as cold-peace is separated but also exist; Through after the recycling of certain number of times; Its heat storage capacity obviously reduces, and has shortened its work-ing life greatly, has directly influenced the widespread use of inorganic hydrated salt as phase change heat storage material.
Chinese patent document CN1944567A has announced " a kind of phase change heat storage material and preparation method thereof "; This phase change heat storage material is by the major ingredient sodium acetate; Additive borax and SEPIGEL 305 are formed, and the borax weight percent is 1-3%, and the SEPIGEL 305 weight percent is 0.5-2%; Its preparation technology is earlier that above-mentioned each component ground and mixed is even, pours in the container behind the heating and melting and uses.
Chinese patent document CN1357593A discloses " a kind of New-type phase change heat-storing material "; This material for storing heat of phase change in low temperature is made up of major ingredient sodium-acetate, sodium phosphate, yellow soda ash and atlapulgite; The weight percent of sodium-acetate is that the weight percent of 85-90%, sodium phosphate is that the weight percent of 3-5%, yellow soda ash is 3-5%; Surplus is an atlapulgite, its preparation technology for earlier with above-mentioned materials prepare in proportion, levigate, mix thoroughly, pour in the container after the fusion and use.
Above-mentioned heat-storing material additive is more, and cost is high, the preparation process is complicated, and condensate depression is higher than 4 ℃.
Summary of the invention
Existing deficiency when the present invention is directed to inorganic hydrated salt as material for storing heat of phase change in low temperature has proposed a kind of stable performance, material for storing heat of phase change in low temperature that condensate depression is little, and a kind of preparation method of this heat-storing material is provided simultaneously, and this method is simple and convenient.
Material for storing heat of phase change in low temperature of the present invention; Be made up of sodium acetate trihydrate (
), sodium pyrophosphate decahydrate (
) and SEPIGEL 305 (
), the weight percent of three kinds of components is respectively 96%-98%, 1%-2% and 1%-2%.
Above-mentioned material for storing heat of phase change in low temperature is major ingredient with the sodium acetate trihydrate, is additive with sodium pyrophosphate decahydrate and SEPIGEL 305, and sodium pyrophosphate decahydrate mainly works to eliminate condensate depression; SEPIGEL 305 is a kind of good thickening material; Has good effect to suppressing the phenomenon of phase separation of sodium acetate trihydrate in phase transition process; The component of this material and weight proportion thereof obtain through testing repeatedly, compare with existing heat-storing material to have following outstanding feature:
1. the additive types that constitutes phase change heat storage material is few, and adding proportion is low, and prescription is simple, and materials are all industrial pure material, and is with low cost, be easy to get.
2. condensate depression is low, is lower than 2 ℃.
3. SEPIGEL 305 is as a kind of good thickening material, and it is effective to prevent to be separated, and through nearly 500 times evidence, does not almost have phenomenon of phase separation.
The preparation method of above-mentioned material for storing heat of phase change in low temperature is:
The ratio that is respectively 96%-98%, 1%-2% and 1%-2% by weight percentage takes by weighing sodium acetate trihydrate, sodium pyrophosphate decahydrate and SEPIGEL 305; Earlier load weighted sodium acetate trihydrate is heated to 68.5-71 ℃ in reaction kettle, after the fusing, successively load weighted sodium pyrophosphate decahydrate and SEPIGEL 305 is added in the reaction kettle fully; Mix while stirring; After stirring, canned while hot in container under 68.5-71 ℃ of temperature, the volume of injection is the 88%-90% of vessel volume; Retain the space of 10%-12% in the container, treat sealed vessel after liquid cooling to the room temperature.During use, container directly uses with heat-storing material, need not open container.
Material for storing heat of phase change in low temperature additive types of the present invention is less, and is high through the stability of this material of experiment proof repeatedly, latent heat of phase change big (being about 250kJ/kg); Tc moderate (55～56 ℃); Condensate depression is no more than 2 ℃, is colloidal liquid during this phase change heat storage material fusing, has avoided phenomenon of phase separation; Simple, the easy encapsulation of preparation process, it is convenient to produce.
Embodiment
Embodiment 1
96%, 2% and 2% the ratio of being respectively by weight percentage takes by weighing sodium acetate trihydrate, sodium pyrophosphate decahydrate and SEPIGEL 305; Earlier load weighted sodium acetate trihydrate is heated to 69 ℃ in reaction kettle; After the fusing, successively load weighted sodium pyrophosphate decahydrate, SEPIGEL 305 are added in the reaction kettle fully, stir on the limit, mix on the limit; After stirring, canned while hot in experiment container.The volume that injects is 88% of a vessel volume, retains 12% space in the container, treats sealed vessel after the liquid cooling.
Material for storing heat of phase change in low temperature latent heat through advance copy embodiment preparation is 248kJ/kg, and Tc is 55 ℃, and condensate depression is 2 ℃.
Embodiment 2
97%, 1.5% and 1.5% the ratio of being respectively by weight percentage takes by weighing sodium acetate trihydrate, sodium pyrophosphate decahydrate and SEPIGEL 305; Earlier load weighted sodium acetate trihydrate is heated to 70 ℃ in reaction kettle; After the fusing, successively load weighted sodium pyrophosphate decahydrate, SEPIGEL 305 are added in the reaction kettle fully, stir on the limit, mix on the limit; After stirring, canned while hot in experiment container.The volume that injects is 89% of a vessel volume, retains 11% space in the container, treats sealed vessel after the liquid cooling.
Material for storing heat of phase change in low temperature latent heat through advance copy embodiment preparation is 250kJ/kg, and Tc is 56 ℃, and condensate depression is 1.5 ℃.
Embodiment 3
98%, 1% and 1% the ratio of being respectively by weight percentage takes by weighing sodium acetate trihydrate, sodium pyrophosphate decahydrate and SEPIGEL 305; Earlier load weighted sodium acetate trihydrate is heated to 71 ℃ in reaction kettle; After the fusing, successively load weighted sodium pyrophosphate decahydrate, SEPIGEL 305 are added in the reaction kettle fully, stir on the limit, mix on the limit; After stirring, canned while hot in experiment container.The volume that injects is 90% of a vessel volume, retains 10% space in the container, treats sealed vessel after the liquid cooling.
Material for storing heat of phase change in low temperature latent heat through advance copy embodiment preparation is 253kJ/kg, and Tc is 57 ℃, and condensate depression is 1.8 ℃.
Claims (2)
1. material for storing heat of phase change in low temperature, it is characterized in that: be made up of sodium acetate trihydrate, sodium pyrophosphate decahydrate and SEPIGEL 305, the weight percent of three kinds of components is respectively 96%-98%, 1%-2% and 1%-2%.
2. the preparation method of the said material for storing heat of phase change in low temperature of claim 1 is characterized in that:
The ratio that is respectively 96%-98%, 1%-2% and 1%-2% by weight percentage takes by weighing sodium acetate trihydrate, sodium pyrophosphate decahydrate and SEPIGEL 305; Earlier load weighted sodium acetate trihydrate is heated to 68.5-71 ℃ in reaction kettle, after the fusing, successively load weighted sodium pyrophosphate decahydrate and SEPIGEL 305 is added in the reaction kettle fully; Mix while stirring; After stirring, canned while hot in container under 68.5-71 ℃ of temperature, the volume of injection is the 88%-90% of vessel volume; Retain the space of 10%-12% in the container, treat sealed vessel after liquid cooling to the room temperature.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105308149A (en) * | 2013-06-03 | 2016-02-03 | 苏纳珀有限公司 | Improved phase change compositions |
| CN105505329A (en) * | 2015-12-29 | 2016-04-20 | 华南理工大学 | Method for reducing condensate depression of hydrous salt phase change material by adding antisolvent |
| CN106753259A (en) * | 2016-11-25 | 2017-05-31 | 贺迈新能源科技（上海）有限公司 | The heat accumulating and preparation method of a kind of low transformation temperature |
| CN108485611A (en) * | 2018-06-12 | 2018-09-04 | 江苏星云物联科技有限公司 | A kind of phase change heat storage material and preparation method thereof |
| CN110591654A (en) * | 2019-09-29 | 2019-12-20 | 新奥石墨烯技术有限公司 | Phase-change heat storage composite material and preparation method thereof |
-
2012
- 2012-07-25 CN CN2012102586013A patent/CN102757766A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 阮德水等: "《三水合醋酸钠相变贮热的研究》", 《华中师范大学学报》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105308149A (en) * | 2013-06-03 | 2016-02-03 | 苏纳珀有限公司 | Improved phase change compositions |
| CN105308149B (en) * | 2013-06-03 | 2019-03-22 | 苏纳珀有限公司 | Improved phase change compositions |
| US10308855B2 (en) | 2013-06-03 | 2019-06-04 | Sunamp Limited | Phase change compositions |
| US10767093B2 (en) | 2013-06-03 | 2020-09-08 | Sunamp Limited | Phase change compositions |
| CN105505329A (en) * | 2015-12-29 | 2016-04-20 | 华南理工大学 | Method for reducing condensate depression of hydrous salt phase change material by adding antisolvent |
| CN105505329B (en) * | 2015-12-29 | 2018-10-30 | 华南理工大学 | A method of reducing supercooling degree of hydrous salt phase change material by adding anti-solvent |
| CN106753259A (en) * | 2016-11-25 | 2017-05-31 | 贺迈新能源科技（上海）有限公司 | The heat accumulating and preparation method of a kind of low transformation temperature |
| CN108485611A (en) * | 2018-06-12 | 2018-09-04 | 江苏星云物联科技有限公司 | A kind of phase change heat storage material and preparation method thereof |
| CN110591654A (en) * | 2019-09-29 | 2019-12-20 | 新奥石墨烯技术有限公司 | Phase-change heat storage composite material and preparation method thereof |
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Application publication date: 20121031 |