CN102527077A - Method for boosting crystallization of phase-change cold-storing material of eutectic salt solution - Google Patents
Method for boosting crystallization of phase-change cold-storing material of eutectic salt solution Download PDFInfo
- Publication number
- CN102527077A CN102527077A CN2011104259172A CN201110425917A CN102527077A CN 102527077 A CN102527077 A CN 102527077A CN 2011104259172 A CN2011104259172 A CN 2011104259172A CN 201110425917 A CN201110425917 A CN 201110425917A CN 102527077 A CN102527077 A CN 102527077A
- Authority
- CN
- China
- Prior art keywords
- aqueous solution
- cold
- magnetic field
- eutectic salts
- salt solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
Landscapes
- Soft Magnetic Materials (AREA)
Abstract
The invention discloses a method for boosting crystallization of a phase-change cold-storing material of a eutectic salt solution. The method comprises the following steps: mixing 100 parts of eutectic salt solution with a mass concentration of 10-26.4% with 0.1-1.2 parts of magnetic metal nanometer particles or magnetic metal oxide nanometer particles, and then adding 0.2-0.6 parts of surface dispersing agent, and ultrasonically treating for more than 30 minutes, thereby obtaining a suspended low-temperature phase-change cold-storing material of the eutectic salt solution. An electromagnetic coil is uniformly wound on an outer wall around a cold-storing tank; a direct current is introduced; the direction of a generated magnetic field is opposite to the direction of gravity; and the strength of the magnetic field is adjusted by changing the size of a voltage. According to the method provided by the invention, the magnetic nanometer particles and the magnetic field effect are utilized to strengthen the heat-transfer characteristic of the traditional cold-storing material of the eutectic salt solution, the nucleating condensate depression is improved, the crystallizing time is shortened, the cold-storing efficiency is increased, and meanwhile, the volume of a heat exchanger is reduced.
Description
Technical field
The present invention relates to eutectic salts aqueous solution phase change cold-storage field, specifically is a kind of method that promotes the crystallization of eutectic salts aqueous solution phase-change material for cold storage.
Background technology
In recent years, along with the quick growth of China's economic development, the energy scarcity problem is serious day by day, and network load is overweight, and peak, the contradiction that the paddy load difference is big are outstanding all the more, have caused huge energy waste thus.Phase change cold-storage is the effective means that realizes the electrical network peak load shifting; The temperature of industry cold-storage is generally all below 0 ℃; Under present technical conditions; There is following problem in the industry cold-storage: the one, and the nucleation degree of supercooling is bigger during phase change cold-storage, makes the evaporating temperature of refrigeration unit will fall lowlyer, thereby has reduced the operating efficiency of refrigeration unit; The 2nd, the thermal conductivity factor of cool storage material is not high, and the heat transfer efficiency when making cold-storage is relatively poor, finally influences whole cold-storage efficient.At present, the measure of cold-storage apparatus augmentation of heat transfer is mainly started with from enhanced heat exchange surface, manufacturing process, but receives the restriction of cold-storage apparatus structure and manufacturing cost.Thereby carry out augmentation of heat transfer promotion crystallization so be necessary to take other means to start with from cool storage material itself.
Summary of the invention
The objective of the invention is to deficiency, a kind of method that promotes the crystallization of eutectic salts aqueous solution phase-change material for cold storage is provided to prior art.The present invention utilizes the effect in magnetic nano-particle and magnetic field to strengthen the heat-transfer character of traditional eutectic salts aqueous solution cool storage material, not only can improve the nucleation degree of supercooling, shortens crystallization time, improves cold-storage efficient, also can reduce the volume of heat exchanger simultaneously.
The present invention realizes through following technical scheme:
A kind of method that promotes the crystallization of eutectic salts aqueous solution phase-change material for cold storage comprises the steps:
The first step: the preparation of eutectic salts aqueous solution low temperature phase change cold storage material: umber meter by volume; With mass concentration is that 100 parts of 10～26.4% the eutectic salts aqueous solution mix for 0.1～1.2 part with nano metallic nickel granular material or magnetic metal oxide nano particle; Add again and advance 0.2～0.6 part of surface dispersant; Ultrasonic more than 30 minutes, can make the eutectic salts aqueous solution low temperature phase change cold storage material of suspension;
Second step: adding a magnetic field around the cold-storage groove of eutectic salts aqueous solution low temperature phase change cold storage material: when above-mentioned eutectic salts aqueous solution low temperature phase change cold storage material is lowered the temperature cold-storage; With the solenoid uniform winding around the cold-storage groove on the outer wall; And feeding DC current; The magnetic direction and the gravity direction that are produced are opposite, and adjust magnetic field intensity through the size that changes voltage.
The said eutectic salts aqueous solution is inorganic salt solution.
Preferably, said inorganic salts comprise barium chloride, sodium chloride or potassium chloride.
Said nano metallic nickel granular material is iron, cobalt or the nickel of particle diameter less than 100nm; Said magnetic metal oxide nano particle is oxide or the nitride of particle diameter less than iron content, cobalt or the nickel element of 100nm.
Said surface dispersant is the mixture of sodium phosphate trimer and triethanolamine, and its weight ratio is 1:1.
Compared with prior art, the present invention has following advantage and beneficial effect:
The present invention strengthens the nano particle disturbance through the adjustment magnetic field intensity, and particle overcomes the influence of gravity; Stably be suspended among the fluid, play the effect of nucleator well, nano-particles size is suitable with the fluid molecule size; Liquid can be wetting at particle surface well, and contact angle approaches 0
o, and then can eliminate the nucleation degree of supercooling of the eutectic salts aqueous solution.
The essence of eutectic salts aqueous solution free convection is the effect of magnetic field force to magnetic liquid in addition; Externally-applied magnetic field has increased between particle and particle, particle and liquid, the base fluid molecule of magnetic liquid, interaction and collision between particle and the wall; Magnetic field force can show as the apparent density that magnetic field changes magnetic liquid intuitively to the effect of magnetic liquid; And free convection is that the buoyancy of generation produces by the fluid density variation, so magnetic field has strengthened the heat transfer property of the novel eutectic salts aqueous solution.
Moreover the growth of crystal depends primarily on heat transfer, will emit a large amount of heats of solidification during crystallization, and this heat will in time be taken away, and crystal just can constantly be grown up.And the heat transfer property of the novel eutectic salts aqueous solution has been strengthened in the effect in magnetic field, thus the growth of crystal there is facilitation, thus can improve cold-storage efficient.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Wherein, 1. cold-storage groove 2. dc voltage regulators 3. heat exchangers 4. solenoids 5. eutectic salts aqueous solution cool storage materials.
The specific embodiment
Below in conjunction with specific embodiment the present invention is done further concrete detailed description the in detail; But embodiment of the present invention is not limited thereto, and the technical conceive that every employing claim of the present invention limits and other simple transformation on this basis are all in protection scope of the present invention.
As shown in Figure 1, (refrigerating medium is a glycol water to the eutectic salts aqueous solution cool storage material 5 in the cold-storage groove 1, and heat exchanger is immersed in the eutectic salts aqueous solution through refrigerating medium; Refrigerating medium flows in the pipe of heat exchanger) carry out crystallisation by cooling, solenoid 4 outer cold-storage groove 1 surfaces that are wrapped in are in 5 coolings of eutectic salts aqueous solution cool storage material; Opening dc voltage regulator 2 produces magnetic field for solenoid 4 energisings; Dc voltage regulator 2 can change the size of magnetic field intensity, and magnetic field acts on the eutectic salts aqueous solution behind the interpolation magnetic particle, quickens it and becomes crystalline nucleation; Shorten the time of phase transformation, thereby improve the efficient of cold-storage.
Nanometer Fe
3O
4Particle adds magnetic field and promotes BaCl
2Aqueous solution crystallization is 1.2% Fe with volume fraction
3O
4Nano particle and mass concentration are 100 parts of BaCl of 26.4%
2Aqueous solution is in order to let Fe
3O
4Nano particle is suspended in BaCl uniformly
2In the aqueous solution, select the composite dispersing agent of sodium phosphate trimer and triethanolamine for use, the volume fraction of dispersant is 0.6%, carries out ultrasonic vibration then and makes suspending stabilized Fe in 30 minutes
3O
4-BaCl
2-H
2The O cool storage material, magnetic field intensity is 550Gauss during crystallization, and its nucleation degree of supercooling has reduced by 94.2%, and crystallization time has shortened 75.2%.
Embodiment 2
Nanometer Fe
3O
4Particle adds magnetic field and promotes the crystallization of the KCl aqueous solution, is 0.1% Fe with volume fraction
3O
4Nano particle and mass concentration are 100 parts of KCl aqueous solution of 25.5%, in order to let Fe
3O
4Nano particle is suspended in the KCl aqueous solution uniformly, selects the composite dispersing agent of sodium phosphate trimer and triethanolamine for use, and the volume fraction of dispersant is 0.36%, carries out ultrasonic vibration then and makes suspending stabilized Fe in 40 minutes
3O
4-KCl-H
2The O cool storage material, magnetic field intensity is 600Gauss during crystallization, and its nucleation degree of supercooling has reduced by 35.4%, and crystallization time has shortened 28.5%.
Nano Co
2O
3Particle adds magnetic field and promotes the crystallization of the KCl aqueous solution, is 0.5% Co with volume fraction
2O
3Nano particle and mass concentration are 100 parts of KCl aqueous solution of 25.5%, in order to let Co
2O
3Nano particle is suspended in the KCl aqueous solution uniformly, selects the composite dispersing agent of sodium phosphate trimer and triethanolamine for use, and the volume fraction of dispersant is 0.45%, carries out ultrasonic vibration then and makes suspending stabilized Co in 30 minutes
2O
3-KCl-H
2The O cool storage material, magnetic field intensity is 650Gauss during crystallization, and its nucleation degree of supercooling has reduced by 57.3%, and crystallization time has shortened 52.4%.
Embodiment 4
Nano Co
2O
3Particle adds magnetic field and promotes the crystallization of the NaCl aqueous solution, is 1% Co with volume fraction
2O
3Nano particle and mass concentration are 100 parts of NaCl aqueous solution of 26.4%, in order to let Co
2O
3Nano particle is suspended in the NaCl aqueous solution uniformly, selects the composite dispersing agent of sodium phosphate trimer and triethanolamine for use, and the volume fraction of dispersant is 0.55%, carries out ultrasonic vibration then and makes suspending stabilized Co in 30 minutes
2O
3-NaCl-H
2The O cool storage material, magnetic field intensity is 650Gauss during crystallization, and its nucleation degree of supercooling has reduced by 88.5%, and crystallization time has shortened 74.6%.
The foregoing description is a preferred implementation of the present invention; But embodiment of the present invention is not restricted to the described embodiments; Other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; All should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (5)
1. a method that promotes the crystallization of eutectic salts aqueous solution phase-change material for cold storage is characterized in that, comprises the steps:
The first step: the preparation of eutectic salts aqueous solution low temperature phase change cold storage material: umber meter by volume; With mass concentration is that 100 parts of 10～26.4% the eutectic salts aqueous solution mix for 0.1～1.2 part with nano metallic nickel granular material or magnetic metal oxide nano particle; Add again and advance 0.2～0.6 part of surface dispersant; Ultrasonic more than 30 minutes, can make the eutectic salts aqueous solution low temperature phase change cold storage material of suspension;
Second step: adding a magnetic field around the cold-storage groove of eutectic salts aqueous solution low temperature phase change cold storage material: when above-mentioned eutectic salts aqueous solution low temperature phase change cold storage material is lowered the temperature cold-storage; With the solenoid uniform winding around the cold-storage groove on the outer wall; And feeding DC current; The magnetic direction and the gravity direction that are produced are opposite, and adjust magnetic field intensity through the size that changes voltage.
2. method according to claim 1 is characterized in that, the said eutectic salts aqueous solution is inorganic salt solution.
3. method according to claim 2 is characterized in that said inorganic salts comprise barium chloride, sodium chloride or potassium chloride.
4. according to claim 1 or 3 described methods, it is characterized in that said nano metallic nickel granular material is iron, cobalt or the nickel of particle diameter less than 100nm; Said magnetic metal oxide nano particle is oxide or the nitride of particle diameter less than iron content, cobalt or the nickel element of 100nm.
5. method according to claim 4 is characterized in that, said surface dispersant is the mixture of sodium phosphate trimer and triethanolamine, and its weight ratio is 1:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104259172A CN102527077A (en) | 2011-12-16 | 2011-12-16 | Method for boosting crystallization of phase-change cold-storing material of eutectic salt solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104259172A CN102527077A (en) | 2011-12-16 | 2011-12-16 | Method for boosting crystallization of phase-change cold-storing material of eutectic salt solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102527077A true CN102527077A (en) | 2012-07-04 |
Family
ID=46335851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104259172A Pending CN102527077A (en) | 2011-12-16 | 2011-12-16 | Method for boosting crystallization of phase-change cold-storing material of eutectic salt solution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102527077A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105727584A (en) * | 2016-03-16 | 2016-07-06 | 武汉艾力拓科技有限公司 | Crystallization interferometer |
| CN108456509A (en) * | 2018-03-13 | 2018-08-28 | 青海大学 | A kind of inorganic hydrous salt phase transition energy-storing material and preparation method thereof |
| CN110686545A (en) * | 2019-10-21 | 2020-01-14 | 浙江大学 | Phase-change heat storage strengthening device based on variable magnetic field and operation method thereof |
| CN111253913A (en) * | 2020-02-29 | 2020-06-09 | 复旦大学 | Heat storage material based on graphene composite framework structure and preparation method thereof |
| CN111588436A (en) * | 2020-04-27 | 2020-08-28 | 贵州省人民医院 | A bag hemostasis pressurization area for implanted heart electron device |
| CN111991834A (en) * | 2020-09-08 | 2020-11-27 | 安徽银丰药业股份有限公司 | Crystallization barrel is used in menthol processing |
| CN113252378A (en) * | 2021-06-16 | 2021-08-13 | 北京建筑大学 | Cold accumulation working medium test method for cold accumulation tank |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0198689A (en) * | 1987-10-12 | 1989-04-17 | Toshiba Corp | Heat storing device |
| CN101418209A (en) * | 2008-11-21 | 2009-04-29 | 中国科学院广州能源研究所 | Inorganic combined phase-change material for heat storage |
| CN101525530A (en) * | 2009-04-01 | 2009-09-09 | 顺德职业技术学院 | Low temperature phase change cold storage nanofluid and preparation method thereof |
-
2011
- 2011-12-16 CN CN2011104259172A patent/CN102527077A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0198689A (en) * | 1987-10-12 | 1989-04-17 | Toshiba Corp | Heat storing device |
| CN101418209A (en) * | 2008-11-21 | 2009-04-29 | 中国科学院广州能源研究所 | Inorganic combined phase-change material for heat storage |
| CN101525530A (en) * | 2009-04-01 | 2009-09-09 | 顺德职业技术学院 | Low temperature phase change cold storage nanofluid and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 舒碧芬等: "纳米磁性液体对多元多相体系结晶特性的影响", 《中国科学（B辑:化学）》, vol. 37, no. 6, 31 December 2007 (2007-12-31), pages 569 - 574 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105727584A (en) * | 2016-03-16 | 2016-07-06 | 武汉艾力拓科技有限公司 | Crystallization interferometer |
| CN108456509A (en) * | 2018-03-13 | 2018-08-28 | 青海大学 | A kind of inorganic hydrous salt phase transition energy-storing material and preparation method thereof |
| CN108456509B (en) * | 2018-03-13 | 2020-11-06 | 青海大学 | Inorganic hydrated salt phase change energy storage material and preparation method thereof |
| CN110686545A (en) * | 2019-10-21 | 2020-01-14 | 浙江大学 | Phase-change heat storage strengthening device based on variable magnetic field and operation method thereof |
| CN111253913A (en) * | 2020-02-29 | 2020-06-09 | 复旦大学 | Heat storage material based on graphene composite framework structure and preparation method thereof |
| CN111588436A (en) * | 2020-04-27 | 2020-08-28 | 贵州省人民医院 | A bag hemostasis pressurization area for implanted heart electron device |
| CN111991834A (en) * | 2020-09-08 | 2020-11-27 | 安徽银丰药业股份有限公司 | Crystallization barrel is used in menthol processing |
| CN111991834B (en) * | 2020-09-08 | 2021-11-16 | 安徽银丰药业股份有限公司 | Crystallization barrel is used in menthol processing |
| CN113252378A (en) * | 2021-06-16 | 2021-08-13 | 北京建筑大学 | Cold accumulation working medium test method for cold accumulation tank |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102527077A (en) | Method for boosting crystallization of phase-change cold-storing material of eutectic salt solution | |
| Zhang et al. | An overview of phase change material slurries: MPCS and CHS | |
| Li et al. | A comprehensive review on positive cold energy storage technologies and applications in air conditioning with phase change materials | |
| Wu et al. | A review on the effect of external fields on solidification, melting and heat transfer enhancement of phase change materials | |
| Safari et al. | A review on supercooling of Phase Change Materials in thermal energy storage systems | |
| CN104087254A (en) | High-heat-conductivity inorganic phase-change energy storage material | |
| CN107502299B (en) | Multi-phase medium phase-change heat storage material and preparation method thereof | |
| Liang et al. | Preparation and thermal properties of eutectic hydrate salt phase change thermal energy storage material | |
| Sadegh et al. | An experimental investigation into the melting of phase change material using Fe 3 O 4 magnetic nanoparticles under magnetic field | |
| Shi et al. | Crystallization of tetra-n-butyl ammonium bromide clathrate hydrate slurry and the related heat transfer characteristics | |
| CN101525530A (en) | Low temperature phase change cold storage nanofluid and preparation method thereof | |
| CN110003863A (en) | A kind of micro- jelly chilled food is fresh-keeping to use phase-change material for cold storage and preparation method | |
| Attia et al. | Comparative study on AL2O3 nanoparticle addition on cool storage system performance | |
| Dong et al. | Review of latent thermal energy storage systems for solar air‐conditioning systems | |
| Zheng et al. | Experimental study on the preparation and cool storage performance of a phase change micro-capsule cold storage material | |
| Belkhiria et al. | Experimental study of a metal–hydrogen reactor's behavior under the action of an external magnetostatic field during absorption and desorption | |
| Lv et al. | Research progress on the effect of additives on ice slurry | |
| CN104697373A (en) | Foam metal heat exchange structure | |
| CN106893562A (en) | A kind of composite phase-change energy storage material and preparation method | |
| Xing et al. | Ice thermal energy storage enhancement using aligned carbon nanotubes under external magnetic field | |
| JP4665820B2 (en) | Method for promoting solidification and melting of heat storage material and heat storage device | |
| CN113357724B (en) | Ice storage air conditioning system | |
| Kumar et al. | Performance Enhancement of a Domestic Refrigerator With Nanoparticle Enhanced PCM over the Condenser Side. | |
| JP2001280875A (en) | Method for cool storing using mixture slurry of inclusion hydrate and ice and cool storage system | |
| CN103668008A (en) | Thulium-based metal glass, preparation method and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120704 |