CN105199677A - Low-melting-point mixed molten salt heat transfer and thermal storage working medium and application thereof - Google Patents
Low-melting-point mixed molten salt heat transfer and thermal storage working medium and application thereof Download PDFInfo
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- CN105199677A CN105199677A CN201510718403.4A CN201510718403A CN105199677A CN 105199677 A CN105199677 A CN 105199677A CN 201510718403 A CN201510718403 A CN 201510718403A CN 105199677 A CN105199677 A CN 105199677A
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Abstract
The invention belongs to the field of mixed molten salt as an energy storage material and particularly relates to a low-melting-point mixed molten salt heat transfer and thermal storage working medium and an application thereof. The working medium is characterized by comprising components in percentage by weight as follows: 16wt%-27wt% of Ca(NO3)2*4H2O, 49wt%-57wt% of KNO3, 5wt%-13wt% of NaNO3, 6wt%-12wt% of LiNO3 and 4wt%-11wt% of Na2CO3. The application of the low-melting-point mixed molten salt heat transfer and thermal storage working medium is characterized in that the working medium is widely applied to the medium-and-high-temperature heat transfer and thermal storage fields of solar thermal power generation energy storage, wind curtailment and photoelectricity curtailment as well as coal-to-electricity thermal storage heating or industrial waste heat recovery storage. The preparation components of the mixed molten salt are low in cost, and the preparation technology is quite simple. The thermophysical property of the mixed molten salt is quite stable, the phenomenon of separation of a single component in a use process is avoided, the mixed molten salt has the good heat transfer property in a liquid temperature zone, and the saturated steam pressure is lower than 2 atmospheres. The working medium has little metal corrosion and has a wide application range.
Description
Technical field
The invention belongs to energy storage material fused salt mixt field, particularly relate to a kind of low melting point fused salt mixt heat transfer accumulation of heat working medium and application thereof.
Background technology
The fields such as solar energy thermal-power-generating, nuclear power, middle high-temperature heat accumulation, heat supply and chemical industry, drying, process industrial all need middle high temperature heat transfer accumulation of heat working medium.One of application aspect that middle high temperature heat transfer working medium is main, namely solar energy thermal-power-generating technology is developed so far from the eighties in last century, employ and comprise water and steam, air or nitrogen, liquid metal, the multiple heat transfer accumulation of heat such as thermal oil and melting salt working medium, because melting salt has higher use temperature, high thermal stability, high specific heat capacity, high convective heat-transfer coefficient, low viscosity, low saturated vapor pressure, the advantage of low price etc. " four high three low ", be subject to domestic and international expert to pay much attention to, it is one of main application and development direction of current solar heat power generation system heat transfer accumulation of heat working medium.
One-component fused salt fusing point is too high, cannot meet the demand of heat-transfer working medium to fusing point.Several fused salt significantly can reduce the fusing point of eutectic molten salt mixture after mixing and forming eutectic fused salt mixt, and can in liquid warm area steady running, and the fused salt working medium therefore in industrial application is all this mixing eutectic fused salt.The fields such as solar energy thermal-power-generating, nuclear power, middle high-temperature heat accumulation, heat supply and chemical industry, drying, process industrial are all not quite similar to the requirement of heat transfer accumulation of heat working medium, the invention provides a kind of fused salt mixt with the diversified middle high temperature heat transfer accumulation of heat working medium demand of satisfied industry.
Summary of the invention
In order to promote the application of fused salt mixt in middle high temperature heat transfer hold over system, the invention provides a kind of low melting point fused salt mixt heat transfer accumulation of heat working medium.
In order to achieve the above object, the technical solution used in the present invention is, a kind of low melting point fused salt mixt heat transfer accumulation of heat working medium, by Ca (NO
3)
24H
2o, KNO
3, NaNO
3, LiNO
3and Na
2cO
3composition, its quality proportioning is: Ca (NO
3)
24H
2o:16-27wt%; KNO
3: 49-57wt%; NaNO
3: 5-13wt%; LiNO
3: 6-12wt%; Na
2cO
3: 4-11wt%.
A kind of low melting point fused salt mixt heat transfer accumulation of heat working medium, preparation method is as follows:
(1) first by Ca (NO to be mixed
3)
24H
2o, KNO
3, NaNO
3, LiNO
3and Na
2cO
3material pulverizes grinding respectively, makes Solids Particle Diameter be less than 3cm, in proportion each material is put into stainless steel vessel, mix and blend;
(2) fused salt mixt is progressively heated, and do not stop to be stirred to about 120 DEG C and keep 10 minutes, by the water evaporates in fused salt mixt simultaneously;
(3) continue to be warming up to about 200 DEG C and maintain this temperature, strengthening stirring dynamics, by Ca (NO
3)
24H
2crystal water removing in O, after water vapour is got rid of completely, stop stirring after fused salt cooling, namely this mixing eutectic fused salt has newly configured.
An application for low melting point fused salt mixt heat transfer accumulation of heat working medium, is characterized in that, be widely used in solar energy thermal-power-generating energy storage, abandons wind and abandon high temperature heat transfer accumulation of heat field in photoelectricity and " coal changes electricity " storage heating or industrial afterheat recovery storage etc.
Compared with prior art, the present invention has following beneficial effect:
1, the composition cost of the preparation of fused salt mixt of the present invention is low, blending process is extremely simple.
2, fused salt mixt of the present invention hot physical property performance is highly stable, there will not be the separation phenomenon of a certain composition in use procedure, has good heat transfer property at liquid warm area, and saturated vapour pressure is lower than 2 normal atmosphere.
3, working medium of the present invention is little to metal protection, has wide range of applications.
Accompanying drawing explanation
Fig. 1 is the DSC curve of fused salt mixt of the present invention;
Fig. 2 is the TG curve of fused salt mixt of the present invention.
Embodiment
Below embodiments of the invention are described.
Embodiment: a kind of low melting point fused salt mixt heat transfer accumulation of heat working medium, by Ca (NO
3)
24H
2o, KNO
3, NaNO
3, LiNO
3and Na
2cO
3composition, its quality proportioning is: Ca (NO
3)
24H
2o:16-27wt%; KNO
3: 49-57wt%; NaNO
3: 5-13wt%; LiNO
3: 6-12wt%; Na
2cO
3: 4-11wt%.
A kind of preparation method of low melting point fused salt mixt heat transfer accumulation of heat working medium is as follows:
(1) first by Ca (NO to be mixed
3)
24H
2o, KNO
3, NaNO
3, LiNO
3and Na
2cO
3material pulverizes grinding respectively, makes Solids Particle Diameter be less than 3cm, in proportion each material is put into stainless steel vessel, mix and blend;
(2) fused salt mixt is progressively heated, and do not stop to be stirred to about 120 DEG C and keep 10 minutes, by the water evaporates in fused salt mixt simultaneously;
(3) continue to be warming up to about 200 DEG C and maintain this temperature, strengthening stirring dynamics, by Ca (NO
3)
24H
2crystal water removing in O, after water vapour is got rid of completely, stop stirring, after fused salt cooling, namely this mixing eutectic fused salt has newly configured.
Fig. 1,2 is respectively DSC curve and the TG curve of fused salt mixt of the present invention.
An application for low melting point fused salt mixt heat transfer accumulation of heat working medium, is characterized in that, can be widely used in solar energy thermal-power-generating energy storage, abandons wind and abandon high temperature heat transfer accumulation of heat field in photoelectricity and " coal changes electricity " storage heating or industrial afterheat recovery storage etc.
Protection scope of the present invention is not limited to the above embodiments, everyly in technical foundation of the present invention, makes equivalents, all falls within protection scope of the present invention.
Claims (2)
1. a low melting point fused salt mixt heat transfer accumulation of heat working medium, is characterized in that, by Ca (NO
3)
24H
2o, KNO
3, NaNO
3, LiNO
3and Na
2cO
3composition;
The quality proportioning of each component is: Ca (NO
3)
24H
2o:16-27wt%; KNO
3: 49-57wt%; NaNO
3: 5-13wt%; LiNO
3: 6-12wt%; Na
2cO
3: 4-11wt%.
2. the application of a kind of low melting point fused salt mixt heat transfer accumulation of heat working medium according to claim 1, it is characterized in that, be widely used in solar energy thermal-power-generating energy storage, abandon the middle high temperature heat transfer accumulation of heat field that wind abandons photoelectricity and " coal changes electricity " storage heating or industrial afterheat recovery storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510718403.4A CN105199677A (en) | 2015-10-30 | 2015-10-30 | Low-melting-point mixed molten salt heat transfer and thermal storage working medium and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510718403.4A CN105199677A (en) | 2015-10-30 | 2015-10-30 | Low-melting-point mixed molten salt heat transfer and thermal storage working medium and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105199677A true CN105199677A (en) | 2015-12-30 |
Family
ID=54947643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510718403.4A Pending CN105199677A (en) | 2015-10-30 | 2015-10-30 | Low-melting-point mixed molten salt heat transfer and thermal storage working medium and application thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106281254A (en) * | 2016-07-21 | 2017-01-04 | 北京工业大学 | A kind of two end number mixing Molten Salt Heat Transfer heat storage medium |
| CN106854457A (en) * | 2016-12-22 | 2017-06-16 | 华东理工大学 | A kind of polynary high-performance passes thermal storage and energy accumulation fused salt mixt and preparation method thereof |
| CN107057654A (en) * | 2016-02-18 | 2017-08-18 | 百吉瑞（天津）新能源有限公司 | A kind of mixed nitrate heat transfer accumulation of heat working medium, preparation method and applications |
| CN107057653A (en) * | 2016-02-18 | 2017-08-18 | 百吉瑞（天津）新能源有限公司 | A kind of fused salt mixt heat transfer accumulation of heat working medium, preparation method and applications |
| CN111607363A (en) * | 2020-06-12 | 2020-09-01 | 全球能源互联网研究院有限公司 | Heat transfer and storage medium and preparation method and application thereof |
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| CN103074040A (en) * | 2013-01-01 | 2013-05-01 | 北京工业大学 | Mixed molten salt as heat transfer and storage medium low in melting point |
| CN103259028A (en) * | 2013-04-18 | 2013-08-21 | 中国科学院上海微系统与信息技术研究所 | Molten nitrate salt and application thereof |
| CN103441312A (en) * | 2013-08-16 | 2013-12-11 | 中国科学院上海微系统与信息技术研究所 | (LiNO3-KNO3-KNO2-Ca(NO3)2) quaternary nitric acid eutectic salt and application thereof |
| CN104610926A (en) * | 2013-01-01 | 2015-05-13 | 北京工业大学 | Heat transfer and storage medium containing low melting point mixed molten salt |
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2015
- 2015-10-30 CN CN201510718403.4A patent/CN105199677A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074040A (en) * | 2013-01-01 | 2013-05-01 | 北京工业大学 | Mixed molten salt as heat transfer and storage medium low in melting point |
| CN104610926A (en) * | 2013-01-01 | 2015-05-13 | 北京工业大学 | Heat transfer and storage medium containing low melting point mixed molten salt |
| CN103259028A (en) * | 2013-04-18 | 2013-08-21 | 中国科学院上海微系统与信息技术研究所 | Molten nitrate salt and application thereof |
| CN103441312A (en) * | 2013-08-16 | 2013-12-11 | 中国科学院上海微系统与信息技术研究所 | (LiNO3-KNO3-KNO2-Ca(NO3)2) quaternary nitric acid eutectic salt and application thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107057654A (en) * | 2016-02-18 | 2017-08-18 | 百吉瑞（天津）新能源有限公司 | A kind of mixed nitrate heat transfer accumulation of heat working medium, preparation method and applications |
| CN107057653A (en) * | 2016-02-18 | 2017-08-18 | 百吉瑞（天津）新能源有限公司 | A kind of fused salt mixt heat transfer accumulation of heat working medium, preparation method and applications |
| CN106281254A (en) * | 2016-07-21 | 2017-01-04 | 北京工业大学 | A kind of two end number mixing Molten Salt Heat Transfer heat storage medium |
| CN106854457A (en) * | 2016-12-22 | 2017-06-16 | 华东理工大学 | A kind of polynary high-performance passes thermal storage and energy accumulation fused salt mixt and preparation method thereof |
| CN111607363A (en) * | 2020-06-12 | 2020-09-01 | 全球能源互联网研究院有限公司 | Heat transfer and storage medium and preparation method and application thereof |
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Application publication date: 20151230 |