CN108264888A - A kind of fused salt aqueous solution energy storage working medium and its application - Google Patents
A kind of fused salt aqueous solution energy storage working medium and its application Download PDFInfo
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- CN108264888A CN108264888A CN201611260070.6A CN201611260070A CN108264888A CN 108264888 A CN108264888 A CN 108264888A CN 201611260070 A CN201611260070 A CN 201611260070A CN 108264888 A CN108264888 A CN 108264888A
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Abstract
The invention discloses a kind of fused salt aqueous solution energy storage working medium, are mixed in a certain ratio and formed with water by two or more in potassium nitrate, sodium nitrate, lithium nitrate, calcium nitrate, potassium carbonate, sodium carbonate.Its fusing point is less than 0 DEG C, and boiling point is higher than 110 DEG C.Solar thermal utilization energy storage is can be applied to, wind is abandoned and abandons cryogenic heat transfer energy storage field in photoelectricity and " coal changes electricity " storage heating, heating etc..Fused salt aqueous solution of the present invention is at low cost, preparing process is extremely simple.The hot physical property of fused salt aqueous solution is highly stable, is not in the segregation phenomenon of a certain ingredient during use, boiling point obtains effective promotion compared to water, and fusing point is low, specific heat is big, operation and maintenance are simple.The present invention is the current new direction for solving heating system energy storage working medium, is one of the direction of middle low temperature energy-storage system development.
Description
Technical field
The present invention relates to energy storage material technical field, especially a kind of fused salt aqueous solution energy storage working medium and its application.
Background technology
Solar thermal utilization energy storage abandons wind and abandons the fields such as photoelectricity and " coal changes electricity " storage heating, heating and is required to middle low temperature
Energy storage working medium has water energy-accumulating medium, molten salt energy-storage medium, solid brick energy-accumulating medium etc. at present.As sensible heat energy storage without phase-change,
Water can only work below 100 DEG C under normal pressure, and energy storage is small using the temperature difference, and the density of water is smaller, and energy storage device volume is larger, limit
Application range is made.
Energy-accumulating medium is done with fused salt, there is higher temperature in use, but its fusing point is higher, to avoid in the process of running
Fused salt is set in pipeline, and particularly valve, flange, elbow etc. can not have fused salt residual, otherwise easily cause whole system
Frozen block.
Solid brick energy-accumulating medium, the temperature of heat exchanging fluid can continue with the decline of solid brick temperature during energy-storage system heat release
Decline, take heat it is more and more difficult, heat accumulation efficiency is low, and the easy dusting of heat-storage medium, heat reservoir service life are shorter.
Invention content
In view of the above problems, the object of the present invention is to provide a kind of fused salt aqueous solution energy storage working medium, it can reach and push away
The advantageous effect that wide fused salt is applied in middle cryogenic heat transfer hold over system.
The technical scheme is that：A kind of fused salt aqueous solution energy storage working medium, by KNO3、NaNO3、LiNO3、Ca(NO3)2、
K2CO3And Na2CO3In two or more form fused salt mixt aqueous solution by a certain percentage with water.
Further, using NaNO3、K2CO3And water, quality proportioning NaNO35-10%, K2CO35-40%, H2O
50-90%；Weigh the NaNO of corrresponding quality3、K2CO3, be put into flask and be sufficiently stirred with water, be configured to mass concentration for 10%,
30%th, 50% NaNO3And K2CO3Fused salt mixt aqueous solution, be slowly heated each flask respectively until fused salt mixt aqueous solution
Boiling, mass concentration calculation formula are
Further, using Ca (NO3)2、LiNO3And water, quality proportioning are Ca (NO3)25-40%, LiNO3 5-
10%th, H2O 50-90%；Weigh the Ca (NO of corrresponding quality3)2、LiNO3, it is put into flask and is sufficiently stirred with water, is configured to matter
Measure a concentration of 10%, 30%, 50% Ca (NO3)2And LiNO3Fused salt mixt aqueous solution, it is straight to be slowly heated each flask respectively
It boils to fused salt mixt aqueous solution, mass concentration calculation formula is
Further, using KNO3、NaNO3、Ca(NO3)2And water, quality proportioning KNO33-20%, NaNO3 3-
20%th, Ca (NO3)24-30%, H2O 50-90%；Weigh the KNO of corrresponding quality3、NaNO3With Ca (NO3)2, it is put into flask
It is sufficiently stirred with water, is configured to the fused salt mixt aqueous solution that mass concentration is 10%, 30%, 50%, is slowly heated respectively each
Until fused salt mixt aqueous solution boils, mass concentration calculation formula is flask
Further, using NaNO3、K2CO3、Na2CO3And water, quality proportioning NaNO33-20%, K2CO3 4-
40%th, Na2CO33-20%, H2O 50-90%；Weigh the NaNO of corrresponding quality3、K2CO3、Na2CO3, it is put into flask and is filled with water
Divide stirring, be configured to the fused salt mixt aqueous solution that mass concentration is 10%, 30%, 50%, it is straight to be slowly heated each flask respectively
It boils to fused salt mixt aqueous solution, mass concentration calculation formula is
A kind of application of fused salt aqueous solution energy storage working medium applied to solar thermal utilization or abandons that wind abandons photoelectricity and " coal changes
Low temperature energy storage field in electricity " storage heating or heating etc..
Compared with prior art, the beneficial effects of the invention are as follows：
(1) fused salt aqueous solution of the present invention is at low cost, preparing process is extremely simple
(2) the hot physical property performance of fused salt aqueous solution of the present invention is highly stable, is not in point of a certain ingredient during use
From phenomenon, there is good heat transfer property in liquid warm area.
(3) solidification point of fused salt aqueous solution of the present invention is extremely low, does not have to consider anti-condensation problem, operation dimension in the process of running
Shield is simple.
(4) specific heat of fused salt aqueous solution of the present invention is high, reduces the volume of energy storage device, has saved the first throwing of energy-storage system
Money and floor space.
(5) the fused salt aqueous solution energy-accumulating medium in the present invention has higher boiling point relative to water, and heat transfer temperature difference is big, and its
With advantages such as high thermal stability, high specific heat capacities；There is relatively low solidification point relative to molten salt energy-storage medium.Therefore with fused salt water
For solution as energy storage working medium, system bulk is small, operational safety, safeguards simple.
Description of the drawings
Fig. 1 is the various fused salt aqueous solution boiling points of the present invention with the trend chart of mass concentration.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
Embodiment 1：
Using NaNO3、K2CO3And water, quality proportioning NaNO35%th, K2CO35%th, H2O 90%；Weigh corresponding matter
The NaNO of amount3、K2CO3, it is put into flask and is sufficiently stirred with water, is configured to the NaNO that mass concentration is 10%3And K2CO3Mixing
Fused salt aqueous solution, slow heating flask is until fused salt mixt aqueous solution boils.
Embodiment 2：
Using NaNO3、K2CO3And water, quality proportioning NaNO310%th, K2CO320%th, H2O 70%；It weighs corresponding
The NaNO of quality3、K2CO3, it is put into flask and is sufficiently stirred with water, is configured to the NaNO that mass concentration is 30%3And K2CO3It is mixed
Fused salt aqueous solution is closed, slow heating flask is until fused salt mixt aqueous solution boils.
Embodiment 3：
Using NaNO3、K2CO3And water, quality proportioning NaNO310%th, K2CO340%th, H2O 50%；It weighs corresponding
The NaNO of quality3、K2CO3, it is put into flask and is sufficiently stirred with water, is configured to the NaNO that mass concentration is 50%3And K2CO3It is mixed
Fused salt aqueous solution is closed, slow heating flask is until fused salt mixt aqueous solution boils.
Embodiment 4：
Using Ca (NO3)2、LiNO3And water, quality proportioning are Ca (NO3)25%th, LiNO35%th, H2O 90%；It weighs
Ca (the NO of corrresponding quality3)2、LiNO3, it is put into flask and is sufficiently stirred with water, is configured to the Ca (NO that mass concentration is 10%3)2
And LiNO3Fused salt mixt aqueous solution, slow heating flask until fused salt mixt aqueous solution boil.
Embodiment 5：
Using Ca (NO3)2、LiNO3And water, quality proportioning are Ca (NO3)220%th, LiNO310%th, H2O 70%；Claim
Measure the Ca (NO of corrresponding quality3)2、LiNO3, it is put into flask and is sufficiently stirred with water, is configured to the Ca that mass concentration is 30%
(NO3)2And LiNO3Fused salt mixt aqueous solution, slow heating flask until fused salt mixt aqueous solution boil.
Embodiment 6：
Using Ca (NO3)2、LiNO3And water, quality proportioning are Ca (NO3)240%th, LiNO310%th, H2O 50%；Claim
Measure the Ca (NO of corrresponding quality3)2、LiNO3, it is put into flask and is sufficiently stirred with water, is configured to the Ca that mass concentration is 50%
(NO3)2And LiNO3Fused salt mixt aqueous solution, slow heating flask until fused salt mixt aqueous solution boil.
Embodiment 7：
Using KNO3、NaNO3、Ca(NO3)2And water, quality proportioning KNO33%th, NaNO33%th, Ca (NO3)24%th,
H2O 90%；Weigh the KNO of corrresponding quality3、NaNO3With Ca (NO3)2, it is put into flask and is sufficiently stirred with water, it is dense is configured to quality
The fused salt mixt aqueous solution for 10% is spent, slow heating flask is until fused salt mixt aqueous solution boils.
Embodiment 8：
Using KNO3、NaNO3、Ca(NO3)2And water, quality proportioning KNO320%th, NaNO35%th, Ca (NO3)25%th,
H2O 70%；Weigh the KNO of corrresponding quality3、NaNO3With Ca (NO3)2, it is put into flask and is sufficiently stirred with water, it is dense is configured to quality
The fused salt mixt aqueous solution for 30% is spent, slow heating flask is until fused salt mixt aqueous solution boils.
Embodiment 9：
Using KNO3、NaNO3、Ca(NO3)2And water, quality proportioning KNO310%th, NaNO310%th, Ca (NO3)2
30%th, H2O 50%；Weigh the KNO of corrresponding quality3、NaNO3With Ca (NO3)2, it is put into flask and is sufficiently stirred with water, is configured to
Mass concentration is 50% fused salt mixt aqueous solution, and slow heating flask is until fused salt mixt aqueous solution boils.
Embodiment 10：
Using NaNO3、K2CO3、Na2CO3And water, quality proportioning NaNO33%th, K2CO34%th, Na2CO33%th, H2O
90%；Weigh the NaNO of corrresponding quality3、K2CO3、Na2CO3, it is put into flask and is sufficiently stirred with water, being configured to mass concentration is
10% fused salt mixt aqueous solution, slow heating flask is until fused salt mixt aqueous solution boils.
Embodiment 11：
Using NaNO3、K2CO3、Na2CO3And water, quality proportioning NaNO320%th, K2CO35%th, Na2CO35%th,
H2O 70%；Weigh the NaNO of corrresponding quality3、K2CO3、Na2CO3, it is put into flask and is sufficiently stirred with water, is configured to mass concentration
For 30% fused salt mixt aqueous solution, slow heating flask is until fused salt mixt aqueous solution boils.
Embodiment 12：
Using NaNO3、K2CO3、Na2CO3And water, quality proportioning NaNO35%th, K2CO340%th, Na2CO35%th,
H2O 50%；Weigh the NaNO of corrresponding quality3、K2CO3、Na2CO3, it is put into flask and is sufficiently stirred with water, is configured to mass concentration
For 50% fused salt mixt aqueous solution, slow heating flask is until fused salt mixt aqueous solution boils.
Fig. 1 is variation tendency of the various fused salt aqueous solution boiling points with mass concentration.The boiling point of various fused salt aqueous solutions is with molten
The increase of salt quality concentration, boiling point constantly rise.
Two or more fused salt mixt aqueous solutions in the solubility fused salt such as all chlorates, nitrate, carbonate can obtain
Go out similar variation tendency, be regarded as making equivalents in technical foundation of the present invention.
Using above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the content on specification, it is necessary to determine its technical scope according to right.
Claims (6)
1. a kind of fused salt aqueous solution energy storage working medium, which is characterized in that by KNO3、NaNO3、LiNO3、Ca(NO3)2、K2CO3With
Na2CO3In two or more form fused salt mixt aqueous solution by a certain percentage with water.
2. a kind of fused salt aqueous solution energy storage working medium according to claim 1, which is characterized in that using NaNO3、K2CO3With
Water, quality proportioning NaNO35-10%, K2CO35-40%, H2O 50-90%；Weigh the NaNO of corrresponding quality3、K2CO3,
It is put into flask and is sufficiently stirred with water, be configured to the NaNO that mass concentration is 10%, 30%, 50%3And K2CO3Fused salt mixt
Aqueous solution is slowly heated each flask until fused salt mixt aqueous solution boils respectively, and mass concentration calculation formula is
3. a kind of fused salt aqueous solution energy storage working medium according to claim 1, which is characterized in that using Ca (NO3)2、LiNO3
And water, quality proportioning are Ca (NO3)25-40%, LiNO35-10%, H2O 50-90%；Weigh the Ca of corrresponding quality
(NO3)2、LiNO3, it is put into flask and is sufficiently stirred with water, is configured to the Ca (NO that mass concentration is 10%, 30%, 50%3)2With
LiNO3Fused salt mixt aqueous solution, be slowly heated respectively each flask until fused salt mixt aqueous solution boil, mass concentration calculate
Formula is
4. a kind of fused salt aqueous solution energy storage working medium according to claim 1, which is characterized in that using KNO3、NaNO3、Ca
(NO3)2And water, quality proportioning KNO33-20%, NaNO33-20%, Ca (NO3)24-30%, H2O 50-90%；Claim
Measure the KNO of corrresponding quality3、NaNO3With Ca (NO3)2, be put into flask and be sufficiently stirred with water, be configured to mass concentration for 10%,
30%th, 50% fused salt mixt aqueous solution is slowly heated each flask until the boiling of fused salt mixt aqueous solution, mass concentration respectively
Calculation formula is
5. a kind of fused salt aqueous solution energy storage working medium according to claim 1, which is characterized in that using NaNO3、K2CO3、
Na2CO3And water, quality proportioning NaNO33-20%, K2CO34-40%, Na2CO33-20%, H2O 50-90%；It weighs
The NaNO of corrresponding quality3、K2CO3、Na2CO3, be put into flask and be sufficiently stirred with water, be configured to mass concentration for 10%, 30%,
50% fused salt mixt aqueous solution is slowly heated each flask until fused salt mixt aqueous solution boils respectively, and mass concentration calculates
Formula is
6. a kind of application of fused salt aqueous solution energy storage working medium, which is characterized in that applied to solar thermal utilization or abandon wind and abandon light
Low temperature energy storage field in electricity and " coal changes electricity " storage heating or heating etc..
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113025286A (en) * | 2021-03-11 | 2021-06-25 | 北京工业大学 | Sodium-based binary fused salt high-temperature heat transfer and storage working medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1668718A (en) * | 2002-07-12 | 2005-09-14 | 默克专利有限公司 | Heat storage means |
| CN104845590A (en) * | 2015-03-31 | 2015-08-19 | 戚荣生 | Compound brine used in heat energy storage |
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2016
- 2016-12-30 CN CN201611260070.6A patent/CN108264888A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1668718A (en) * | 2002-07-12 | 2005-09-14 | 默克专利有限公司 | Heat storage means |
| CN104845590A (en) * | 2015-03-31 | 2015-08-19 | 戚荣生 | Compound brine used in heat energy storage |
Non-Patent Citations (1)
| Title |
|---|
| 宫秀敏: "《相变理论基础及应用》", 31 December 2004, 武汉理工大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113025286A (en) * | 2021-03-11 | 2021-06-25 | 北京工业大学 | Sodium-based binary fused salt high-temperature heat transfer and storage working medium |
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Application publication date: 20180710 |