CN102504768A - Method for reducing supercooling degree of hydrous salt phase change material - Google Patents
Method for reducing supercooling degree of hydrous salt phase change material Download PDFInfo
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- CN102504768A CN102504768A CN2011103385799A CN201110338579A CN102504768A CN 102504768 A CN102504768 A CN 102504768A CN 2011103385799 A CN2011103385799 A CN 2011103385799A CN 201110338579 A CN201110338579 A CN 201110338579A CN 102504768 A CN102504768 A CN 102504768A
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- phase transition
- hydrous salt
- salt phase
- transition material
- condensate depression
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Abstract
The invention relates to a method for reducing the supercooling degree of a hydrous salt phase change material, which is characterized by comprising the following step of: in the melting and solidifying circulation process, ensuring the highest temperature of the hydrous salt phase change material to be lower than an upper limit temperature of a phase change temperature range when the hydrous salt phase change material is totally molten and to be higher than a lower limit temperature of the phase change temperature range when the hydrous salt phase change material is totally molten, wherein in the melting and solidifying circulation process, the hydrous salt phase change material is not completely molten, so that the heat release solidification of the hydrous salt phase change material can be realized in the cooling process, and thus, the aim of reducing the supercooling degree of the hydrous salt phase change material is fulfilled. According to the invention, the heat release solidification of the phase change material can be realized in the cooling process and the supercooling degree is greatly reduced without adding any other nucleating agents. In the method, only the temperature of the hydrous salt phase change material is needed to be controlled. The method is simple to operate and has high reliability.
Description
Technical field
The present invention relates to the method that a kind of hydrous salt phase transition material condensate depression reduces, belong to the technical field of materialogy.
Background technology
Hydration salt phase change material is one type of important in middle low temperature accumulation of energy phase change material, many advantages such as use is extensive, low price, Heat of fusion is high, thermal conductivity is good that it has.But also there are two outstanding problems in it in application process, be respectively cold problem and problem of phase separation.
Also non-crystallizable when fluent meterial is cooled to " zero pour ", begin crystallization and must be cooled to " zero pour " following certain temperature time side, this phenomenon was called cold, and the condensate depression of hydrous salt phase transition material is sometimes up to attending Baidu.And the domestic method that suppresses condensate depression is the interpolation nucleator.Wherein a kind of method still there are some researches show that also the nucleation performance and the unit cell parameters of the nucleator of interpolation do not have positive connection for adding microgranular texture and the similar material of phase change material structure as nucleator.Comprehensive existing research, the system of selection of nucleator still is to lean on " Edison's method " basically, promptly checks the performance of nucleator through a large amount of experiments.
The interpolation nucleator can reduce the condensate depression of hydrous salt phase transition material; But also increased use cost; And the effect of adding different nucleators is also inequality; Sometimes along with the increase of phase transformation cycle index, the effect of nucleator is also with variation, therefore if can seek a kind of application prospect that method that nucleator just can suppress the phase change material condensate depression then will improve the hydrous salt phase transition material greatly that need not to add.
Summary of the invention
Technical problem:The objective of the invention is to solve the bigger problem of hydrous salt phase transition material condensate depression, a kind of method that reduces hydrous salt phase transition material condensate depression is provided.
Technical scheme:For solving the problems of the technologies described above, the scheme that the present invention proposes is a kind of method that reduces hydrous salt phase transition material condensate depression, and this method comprises the steps:
Solidify in the working cycle in the phase change material fusing; The ceiling temperature of phase transition temperature interval when the top temperature that makes the hydrous salt phase transition material reached melts less than the hydrous salt phase transition material fully; And the lower limit temperature of phase transition temperature interval when melting fully greater than the hydrous salt phase transition material; The hydrous salt phase transition material of this moment is fusing fully, and the hydrous salt phase transition material just can realize that heat release solidifies in temperature-fall period, thereby reaches the purpose of reduction hydrous salt phase transition material condensate depression.
Preferably, described hydrous salt phase transition material is a Sodium acetate trihydrate, and phase transition temperature interval was 59 when it melted fully
oC-67
OC, when heating, make that the top temperature of Sodium acetate trihydrate is 63.5
OC, the condensate depression of Sodium acetate trihydrate can be reduced near 0 like this
OC, reach the purpose that reduces the Sodium acetate trihydrate condensate depression.
Preferably, described hydrous salt phase transition material is a sal glauberi, and phase transition temperature interval was about 33.5 when it melted fully
oC-40
OC, when heating, make that the top temperature of sal glauberi is 36
OC, the condensate depression of sal glauberi can be reduced near 0 like this
OC, reach the purpose that reduces the sal glauberi condensate depression.
Preferably, described hydrous salt phase transition material is a disodium hydrogen phosphate, and phase transition temperature interval was about 36.5 when it melted fully
oC-42.5
OC, when heating, make that the top temperature of disodium hydrogen phosphate is 39.5
OC, the condensate depression of disodium hydrogen phosphate can be reduced to 10 like this
OCIn, reach the purpose that reduces the disodium hydrogen phosphate condensate depression.
Beneficial effect:
1. need not to add the cold problem of mistake that any other nucleator just can solve the hydrous salt phase transition material.
2. method is simple to operate, and safety is high.
Embodiment
Further specify in the face of the present invention down.
The method of reduction hydrous salt phase transition material condensate depression provided by the invention, this method comprises the steps:
Solidify in the working cycle in the phase change material fusing; The ceiling temperature of phase transition temperature interval when the top temperature that makes the hydrous salt phase transition material reached melts less than the hydrous salt phase transition material fully; And the lower limit temperature of phase transition temperature interval when melting fully greater than the hydrous salt phase transition material; The hydrous salt phase transition material of this moment is fusing fully, and the hydrous salt phase transition material just can realize that heat release solidifies in temperature-fall period, thereby reaches the purpose of reduction hydrous salt phase transition material condensate depression.
Described hydrous salt phase transition material is a Sodium acetate trihydrate, and phase transition temperature interval was 59 when it melted fully
oC-67
OC, when heating, make that the top temperature of Sodium acetate trihydrate is 63.5
OC, the condensate depression of Sodium acetate trihydrate can be reduced near 0 like this
OC, reach the purpose that reduces the Sodium acetate trihydrate condensate depression.
Described hydrous salt phase transition material is a sal glauberi, and phase transition temperature interval was about 33.5 when it melted fully
oC-40
OC, when heating, make that the top temperature of sal glauberi is 36
OC, the condensate depression of sal glauberi can be reduced near 0 like this
OC, reach the purpose that reduces the sal glauberi condensate depression.
Described hydrous salt phase transition material is a disodium hydrogen phosphate, and phase transition temperature interval was about 36.5 when it melted fully
oC-42.5
OC, when heating, make that the top temperature of disodium hydrogen phosphate is 39.5
OC, the condensate depression of disodium hydrogen phosphate can be reduced to 10 like this
OCIn, reach the purpose that reduces the disodium hydrogen phosphate condensate depression.
The hydrous salt phase transition material that the present invention selects is Sodium acetate trihydrate (CH
3COONa3H
2O), its transition temperature area is about 59
oC-67
OC, and its condensate depression can reach tens degree.The method of utilizing the present invention to propose, control Sodium acetate trihydrate temperature in test process, making the interval ceiling temperature of its residing temperature variation is 63.5
OC, find that in test process its condensate depression can be reduced near 0
OC
Second kind of hydrous salt phase transition material that the present invention selects is sal glauberi (Na
2SO
410H
2O), its transition temperature area is about 33.5
oC-40
OC,, and its condensate depression can reach tens degree.The method of utilizing the present invention to propose, control sal glauberi temperature in test process, making the interval ceiling temperature of its residing temperature variation is 36
OC, find that in test process its condensate depression can be reduced near 0
OC
The third hydrous salt phase transition material that the present invention selects is disodium hydrogen phosphate (Na
2HPO
412H
2O), its transition temperature area is about 59
oC-67
OC, and its condensate depression can reach tens degree.The method of utilizing the present invention to propose, control disodium hydrogen phosphate temperature in test process, making the interval ceiling temperature of its residing temperature variation is 39.5
OC, find that in test process its condensate depression can be reduced to 10
OCIn.
The above is merely preferred embodiments of the present invention; Protection scope of the present invention is not exceeded with above-mentioned embodiment; As long as the equivalence that those of ordinary skills do according to disclosed content is modified or changed, all should include in the protection domain of putting down in writing in claims.
Claims (4)
1. method that reduces hydrous salt phase transition material condensate depression, it is characterized in that: this method comprises the steps:
Solidify in the working cycle in the phase change material fusing; The ceiling temperature of phase transition temperature interval when the top temperature that makes the hydrous salt phase transition material reached melts less than the hydrous salt phase transition material fully; And the lower limit temperature of phase transition temperature interval when melting fully greater than the hydrous salt phase transition material; The hydrous salt phase transition material of this moment is fusing fully, and the hydrous salt phase transition material just can realize that heat release solidifies in temperature-fall period, thereby reaches the purpose of reduction hydrous salt phase transition material condensate depression.
2. the method for reduction hydrous salt phase transition material condensate depression according to claim 1 is characterized in that: described hydrous salt phase transition material is a Sodium acetate trihydrate, and phase transition temperature interval was 59 when it melted fully
oC-67
oC when heating, makes that the top temperature of Sodium acetate trihydrate is 63.5
oC, the condensate depression of Sodium acetate trihydrate can be reduced near 0 like this
oC reaches the purpose that reduces the Sodium acetate trihydrate condensate depression.
3. the method for reduction hydrous salt phase transition material condensate depression according to claim 1 is characterized in that: described hydrous salt phase transition material is a sal glauberi, and phase transition temperature interval was about 33.5 when it melted fully
oC-40
oC when heating, makes that the top temperature of sal glauberi is 36
oC, the condensate depression of sal glauberi can be reduced near 0 like this
oC reaches the purpose that reduces the sal glauberi condensate depression.
4. the method for reduction hydrous salt phase transition material condensate depression according to claim 1 is characterized in that: described hydrous salt phase transition material is a disodium hydrogen phosphate, and phase transition temperature interval was about 36.5 when it melted fully
oC-42.5
oC when heating, makes that the top temperature of disodium hydrogen phosphate is 39.5
oC, the condensate depression of disodium hydrogen phosphate can be reduced to 10 like this
oIn the C, reach the purpose that reduces the disodium hydrogen phosphate condensate depression.
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| CN2011103385799A CN102504768A (en) | 2011-11-01 | 2011-11-01 | Method for reducing supercooling degree of hydrous salt phase change material |
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| CN2011103385799A CN102504768A (en) | 2011-11-01 | 2011-11-01 | Method for reducing supercooling degree of hydrous salt phase change material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743275A (en) * | 2014-01-20 | 2014-04-23 | 华北电力大学 | Device and method for utilizing hydrated salt phase-change material to stabilize supercooling energy storage device and application |
| CN107384325A (en) * | 2017-07-11 | 2017-11-24 | 江苏理工学院 | A kind of method for extending hydrous salt phase change material service life |
| CN108531138A (en) * | 2018-04-23 | 2018-09-14 | 西北大学 | Low degree of supercooling quaternary disodium hydrogen phosphate base phase change heat storage material |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212340A (en) * | 2011-04-11 | 2011-10-12 | 北京京润宝网络技术有限公司 | Sodium acetate trihydrate phase change energy storage material compositions |
| CN102212341A (en) * | 2011-04-11 | 2011-10-12 | 北京京润宝网络技术有限公司 | Sodium sulfate decahydrate phase change energy storage material compositions |
-
2011
- 2011-11-01 CN CN2011103385799A patent/CN102504768A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212340A (en) * | 2011-04-11 | 2011-10-12 | 北京京润宝网络技术有限公司 | Sodium acetate trihydrate phase change energy storage material compositions |
| CN102212341A (en) * | 2011-04-11 | 2011-10-12 | 北京京润宝网络技术有限公司 | Sodium sulfate decahydrate phase change energy storage material compositions |
Non-Patent Citations (4)
| Title |
|---|
| 《工程热物理学报》 20060930 李晶，等 "改善三水醋酸钠固液相变性能的实验研究" 第817－819页 1－4 第27卷, 第5期 * |
| 《走中国创造之路－2011中国制冷学会学术年会论文集》 20111023 金星,等 "三水醋酸钠部分熔化时相变特性分析" 第926－931页 1－4 , * |
| 李晶，等: ""改善三水醋酸钠固液相变性能的实验研究"", 《工程热物理学报》, vol. 27, no. 5, 30 September 2006 (2006-09-30), pages 817 - 819 * |
| 金星,等: ""三水醋酸钠部分熔化时相变特性分析"", 《走中国创造之路－2011中国制冷学会学术年会论文集》, 23 October 2011 (2011-10-23), pages 926 - 931 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103743275A (en) * | 2014-01-20 | 2014-04-23 | 华北电力大学 | Device and method for utilizing hydrated salt phase-change material to stabilize supercooling energy storage device and application |
| CN103743275B (en) * | 2014-01-20 | 2015-07-15 | 华北电力大学 | Device and method for utilizing hydrated salt phase-change material to stabilize supercooling energy storage device and application |
| CN107384325A (en) * | 2017-07-11 | 2017-11-24 | 江苏理工学院 | A kind of method for extending hydrous salt phase change material service life |
| CN108531138A (en) * | 2018-04-23 | 2018-09-14 | 西北大学 | Low degree of supercooling quaternary disodium hydrogen phosphate base phase change heat storage material |
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Application publication date: 20120620 |