CN103045175A - High-performance moderate-temperature phase-change energy-storage material and preparation method thereof - Google Patents
High-performance moderate-temperature phase-change energy-storage material and preparation method thereof Download PDFInfo
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- CN103045175A CN103045175A CN2012105571151A CN201210557115A CN103045175A CN 103045175 A CN103045175 A CN 103045175A CN 2012105571151 A CN2012105571151 A CN 2012105571151A CN 201210557115 A CN201210557115 A CN 201210557115A CN 103045175 A CN103045175 A CN 103045175A
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Abstract
The invention relates to a high-performance moderate-temperature inorganic phase-change energy-storage material and a preparation method thereof. The material comprises the following components by weight percent: 95-99% of sodium phosphate dibasic dodecahydrate and 1-5% of sodium salt additive, wherein the sodium salt additive comprises sodium metasilicate nonahydrate, sodium salt of carboxy methyl-cellulose and sodium polyacrylate. According to the invention, as an improvement of a traditional inorganic phase-change energy-storage material, the material provided by the invention has larger phase change latent heat larger than 210 J/g and appropriate phase change temperature 30-40 DEG C, is an energy storage material with good performance within the temperature range, and has a wide application prospect.
Description
Technical field
The present invention relates to phase-changing energy storage material, especially a kind of high-performance medium-temperature phase-changing energy storage material and preparation method thereof.
Background technology
Phase-changing energy storage material can carry out energy exchange with environment in phase transition process, absorb or discharge a large amount of latent heats of phase change, can effectively alleviate energy supply and demand unbalanced problem on room and time, has played the effect that improves capacity usage ratio.Compare with the sensible heat energy storage, phase-change accumulation energy has that temperature control is constant, the transformation temperature range of choice is wide, energy storage density is high, energy-saving effect is remarkable, be easy to the advantage such as control, has important application prospect in fields such as heating and air-conditioning, accumulation of heat building, sun power utilization, power supply system optimization, aerospace and extreme environment clothes.
Phase-changing energy storage material mainly is divided into organic phase change energy storage material and inorganic-phase variable energy storage material.The organic phase change energy storage material stable performance, the transformation temperature scope is wide, and exothermic process is almost without mistake cold-peace phenomenon of phase separation, but its latent heat of phase change is lower, and density is less, so the unit volume energy storage capacity is less, and its application prospect is not expected.The inorganic-phase variable heat accumulating has higher unit volume energy storage heat and good thermal conductivity, but the problem that usually existed cold-peace to be separated, if can adopt suitable method to improve the problems referred to above, then the inorganic-phase variable energy storage material will have fairly obvious advantage.
In real life, the middle temperature phase change material purposes between 30 ℃～40 ℃ is more extensive, and warm phase change material relatively lacks in the inorganic hydrated salt class that can develop at present.Therefore, developing the inorganic middle temperature phase change material with actual application value has great importance.
By retrieval, find two pieces of middle temperature phase-changing energy storage materials relevant with present patent application:
1, a kind of preparation method of inorganic hydrous salt phase transition energy-storing material (CN200810065301.7), its first step: add 40～60 gram inorganic salt particles in the water and 3～5 grams were prevented mixing cryogen at 100 grams, make the hydrated inorganic salts solution; Second step: in the hydrated inorganic salts solution, add 5～10 gram sodium polyacrylates, mix, make thick hydrated inorganic salt mixed solution.The hydrated inorganic salt phase transformation material preparation method that this invention provides adds when its preparation process and prevented cryogen and sodium polyacrylate; Can effectively prevent the cold and phenomenon of phase separation of mistake that hydrated inorganic salt phase transformation material occurs in phase transition process, guarantee that hydrated inorganic salt phase transformation material can also keep its homogeneity after repeatedly circulating.
2, a kind of inorganic-phase variable energy storage material (CN102604599A), this invention relates to the energy storage material technical field, especially refers to a kind of inorganic-phase variable energy storage material, its each component mass percentage content is as follows: energy storage material 70-99.5%, nucleator 0.25-20%, properties-correcting agent 0.1-15%, water 0.1-15%.Described energy storage material is bases hydrate or crystalline hydrate salt, espespecially bases hydrate; Described nucleator is carbonate, and described properties-correcting agent is dispersion agent.Nucleator and the proportioning thereof of this invention by select being fit to can effectively solve material and be separated, especially by in system, adding dispersion agent, and the phase-changing energy storage material of preparation, good cycling stability does not change through potential heat value after thousands of the circulations simultaneously.
Through contrast, above-mentioned two pieces of patent publication us have more identical with teachings herein.
Summary of the invention
The object of the invention is to overcome the weak point of above technology, provide that a kind of thermal circulation performance is stable, condensate depression is little, high-performance medium-temperature phase-changing energy storage material and preparation method thereof.
The objective of the invention is to be achieved by the following scheme:
A kind of high-performance medium-temperature inorganic-phase variable energy storage material, its raw material form weight percentage and are:
Disodium hydrogen phosphate: 95～99%;
Sodium salt additive: 1～5%.
And described sodium salt additive is selected from non-hydrate sodium metasilicate, Xylo-Mucine and sodium polyacrylate any one or any two kinds of combinations.
And a kind of preparation method of high-performance medium-temperature inorganic-phase variable energy storage material comprises the steps:
⑴ be heated to fully fusing with described disodium hydrogen phosphate under 60～70 ℃ of conditions;
⑵ add described sodium salt additive, fully continues to be heated into the flow-like material behind the mixing;
⑶ pour into the flow-like material in the container and encapsulate.
Advantage of the present invention and positively effect are:
1, middle temperature phase-changing energy storage material provided by the invention is with Na
2HPO
412H
2The O inorganic hydrated salt makes material monolithic have larger density, solution heat and thermal conductivity as base-material, and condensate depression is less than 3 ℃, and exothermic process is stable, without phenomenon of phase separation, good reproducibility.
2, the present invention is by improveing traditional inorganic-phase variable energy storage material, make it have larger latent heat of phase change large (greater than 210J/g) and suitable transformation temperature suitable (30 ℃～40 ℃), be well behaved energy storage material in this temperature range, have broad application prospects.
3, middle temperature phase-changing energy storage material provided by the invention has only namely promoted the phase-changing energy storage material superperformance by a small amount of sodium salt additive, and almost do not increase its Financial cost, has higher economic benefit, also avoided the too much and interactive problem of additive, guaranteed that phase-changing energy storage material has preferably stability.
4, simple, the easy handling of middle temperature phase-changing energy storage material preparation method provided by the invention, its abundant raw material, nontoxic, nothing corrosion become uniform liquid state after melting, be easy to encapsulation.
Embodiment
Embodiments of the invention are described further; Following embodiment is illustrative, is not determinate, can not limit protection scope of the present invention with following embodiment.
Embodiment 1:
A kind of high-performance medium-temperature phase-changing energy storage material, it consists of raw material and weight is respectively:
Disodium hydrogen phosphate: 95.25g;
Non-hydrate sodium metasilicate: 4.75 g.
Each chemical composition that present embodiment adopts need seal preservation, is exposed under the disodium hydrogen phosphate normal temperature particularly that easy-weathering loses crystal water in the air, has a strong impact on its use properties.The packing that the selected material of the present invention adopts when dispatching from the factory all can satisfy seal request, does not therefore damage outer packaging as long as note in the transportation.
The preparation method of above-mentioned middle temperature phase-changing energy storage material may further comprise the steps: first disodium hydrogen phosphate is heated to fully fusing under 60 ℃～70 ℃ conditions; Then add nine water water glass, fully continue to be heated into the flow-like material behind the mixing; At last the flow-like material is poured in the container and encapsulate, get product.
Should note following item in the production process:
(1) packaging container can adopt plastics or metal vessel, and it can be sphere, rectangle, cubes or cylindrical that shape is selected, no matter but adopt which kind of packaged type, all should guarantee itself and the stopping property in the external world.
(2) before the adding additive, disodium hydrogen phosphate is fully melted, can be heated to a little higher than transformation temperature and add again additive; When adding additive, should slowly add, and constantly stir, avoid once desired additives is all added.
The phase-changing energy storage material of making according to above-mentioned prescription and technique is white in color, and becomes transparence when liquid.This material phase transformation latent heat is greater than 210 J/g, and transformation temperature is about 35 ℃.
Embodiment 2:
A kind of high-performance medium-temperature phase-changing energy storage material, it consists of raw material and weight is respectively:
Disodium hydrogen phosphate: 95.50 g;
Xylo-Mucine: 4.50 g.
Its preparation method and precaution are same as embodiment 1.
The phase-changing energy storage material of making according to above-mentioned prescription and technique is creamy white, and is sticky shape when liquid.This material phase transformation latent heat is greater than 220 J/g, and transformation temperature is about 36 ℃.
Embodiment 3:
A kind of high-performance medium-temperature phase-changing energy storage material, it consists of raw material and weight is respectively:
Disodium hydrogen phosphate: 94.54 g;
Xylo-Mucine: 4.46 g;
Sodium polyacrylate: 1.00 g.
Its preparation method and precaution are same as embodiment 1.
The phase-changing energy storage material of making according to above-mentioned prescription and technique is creamy white, and is sticky shape when liquid.This material phase transformation latent heat is greater than 220 J/g, and transformation temperature is about 36 ℃.
More than the phase-changing energy storage material that obtains of three kinds of technical formulas through repetition test, stable performance, condensate depression does not occur being separated less than 3 ℃.The shared mass percent of above-mentioned formulation additives is less, and is very little for the impact of major ingredient energy storage, so kept well the energy storage capacity of disodium hydrogen phosphate.
More than show and described ultimate principle of the present invention, principal character and advantage of the present invention.Industry technician should understand; the present invention is not restricted to the described embodiments; that describes in above embodiment and the specification sheets only illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent.
Claims (3)
1. high-performance medium-temperature inorganic-phase variable energy storage material is characterized in that: its raw material forms weight percentage and is:
Disodium hydrogen phosphate: 95～99%;
Sodium salt additive: 1～5%.
2. warm phase-changing energy storage material in the high-performance inorganic according to claim 1 is characterized in that: described sodium salt additive is selected from non-hydrate sodium metasilicate, Xylo-Mucine and sodium polyacrylate any one or any two kinds of combinations.
3. a method for preparing high-performance medium-temperature inorganic-phase variable energy storage material as claimed in claim 1 or 2 is characterized in that: comprise the steps:
⑴ be heated to fully fusing with described disodium hydrogen phosphate under 60～70 ℃ of conditions;
⑵ add described sodium salt additive, fully continues to be heated into the flow-like material behind the mixing;
⑶ pour into the flow-like material in the container and encapsulate.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103468071A (en) * | 2013-08-30 | 2013-12-25 | 贵州中益能低碳节能科技股份有限公司 | Inorganic nano phase change energy storage paint and preparation method thereof |
| CN104357020A (en) * | 2014-11-28 | 2015-02-18 | 巴彦淖尔市卓越建筑材料有限公司 | Nanometer modified inorganic room-temperature phase change heat storage material and preparation method thereof |
| CN112574716A (en) * | 2019-09-29 | 2021-03-30 | 长沙理工大学 | Composite phase change regulator and preparation method and application of composite phase change heat storage material thereof |
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| US6152212A (en) * | 1996-06-25 | 2000-11-28 | Sumitomo Chemical Company, Limited | Heat storage system and heat release control method |
| CN101343530A (en) * | 2008-02-15 | 2009-01-14 | 上海海事大学 | Phase-change heat-storing material and preparation thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6152212A (en) * | 1996-06-25 | 2000-11-28 | Sumitomo Chemical Company, Limited | Heat storage system and heat release control method |
| CN101343530A (en) * | 2008-02-15 | 2009-01-14 | 上海海事大学 | Phase-change heat-storing material and preparation thereof |
Non-Patent Citations (1)
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| 盛青青等: "《十二水磷酸氢二钠的相变性能》", 《化工进展》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103468071A (en) * | 2013-08-30 | 2013-12-25 | 贵州中益能低碳节能科技股份有限公司 | Inorganic nano phase change energy storage paint and preparation method thereof |
| CN104357020A (en) * | 2014-11-28 | 2015-02-18 | 巴彦淖尔市卓越建筑材料有限公司 | Nanometer modified inorganic room-temperature phase change heat storage material and preparation method thereof |
| CN104357020B (en) * | 2014-11-28 | 2017-08-25 | 巴彦淖尔市卓越建筑材料有限公司 | A kind of nano modified inorganic room temperature phase-change heat accumulating and preparation method thereof |
| CN112574716A (en) * | 2019-09-29 | 2021-03-30 | 长沙理工大学 | Composite phase change regulator and preparation method and application of composite phase change heat storage material thereof |
| CN112574716B (en) * | 2019-09-29 | 2022-02-25 | 长沙理工大学 | Composite phase change regulator and preparation method and application of composite phase change heat storage material thereof |
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Application publication date: 20130417 |