CN101289612A - Carbonate molten heat transmission and thermal storage medium, preparation thereof and applications - Google Patents
Carbonate molten heat transmission and thermal storage medium, preparation thereof and applications Download PDFInfo
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- CN101289612A CN101289612A CNA2008100276389A CN200810027638A CN101289612A CN 101289612 A CN101289612 A CN 101289612A CN A2008100276389 A CNA2008100276389 A CN A2008100276389A CN 200810027638 A CN200810027638 A CN 200810027638A CN 101289612 A CN101289612 A CN 101289612A
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- 230000005540 biological transmission Effects 0.000 title claims description 31
- 238000003860 storage Methods 0.000 title claims description 16
- 238000002360 preparation method Methods 0.000 title claims description 15
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 title abstract description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 30
- 238000005338 heat storage Methods 0.000 claims abstract description 24
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims abstract description 16
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims abstract description 16
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims abstract description 5
- 150000003839 salts Chemical class 0.000 claims description 95
- 239000000654 additive Substances 0.000 claims description 43
- 230000000996 additive effect Effects 0.000 claims description 43
- 230000004927 fusion Effects 0.000 claims description 33
- 239000007787 solid Substances 0.000 claims description 19
- 230000003068 static effect Effects 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 18
- WHRZCXAVMTUTDD-UHFFFAOYSA-N 1h-furo[2,3-d]pyrimidin-2-one Chemical compound N1C(=O)N=C2OC=CC2=C1 WHRZCXAVMTUTDD-UHFFFAOYSA-N 0.000 claims description 16
- 235000006173 Larrea tridentata Nutrition 0.000 claims description 16
- 244000073231 Larrea tridentata Species 0.000 claims description 16
- 229960002126 creosote Drugs 0.000 claims description 16
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 claims description 14
- 235000015320 potassium carbonate Nutrition 0.000 claims description 14
- 235000017550 sodium carbonate Nutrition 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 239000001257 hydrogen Substances 0.000 claims description 2
- 238000000197 pyrolysis Methods 0.000 claims description 2
- 238000012546 transfer Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 229910000027 potassium carbonate Inorganic materials 0.000 abstract 1
- 239000001103 potassium chloride Substances 0.000 abstract 1
- 235000011164 potassium chloride Nutrition 0.000 abstract 1
- 239000011780 sodium chloride Substances 0.000 abstract 1
- 238000002844 melting Methods 0.000 description 49
- 230000008018 melting Effects 0.000 description 49
- 238000012986 modification Methods 0.000 description 31
- 230000004048 modification Effects 0.000 description 31
- 238000012360 testing method Methods 0.000 description 26
- 239000000203 mixture Substances 0.000 description 16
- 238000001938 differential scanning calorimetry curve Methods 0.000 description 8
- 239000011734 sodium Substances 0.000 description 7
- 229910002056 binary alloy Inorganic materials 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- AAFFTDXPYADISO-UHFFFAOYSA-N C1CC#CCC1 Chemical compound C1CC#CCC1 AAFFTDXPYADISO-UHFFFAOYSA-N 0.000 description 1
- 206010012373 Depressed level of consciousness Diseases 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- -1 air Chemical class 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000015598 salt intake Nutrition 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- 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
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
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- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention discloses a molten carbonate heat-transfer and heat-storage medium, a method for making the same and a user of the same. The molten carbonate heat-transfer and heat-storage medium comprises potassium carbonate, sodium carbonate and an addition agent, wherein the addition agent consists of sodium chloride and potassium chloride with the mass ratio ranging between 0.1:1 and 0.9:1. The molten carbonate heat-transfer and heat-storage medium can meet the requirements of the operating temperature range required by a solar thermochemical reactor, and has ideal thermal stability and great phase change latent heat; moreover, the medium is undemanding in system size and energy, and has high energy utilization rate and excellent energy-conservation effect.
Description
Technical field
The present invention relates to high temperature heat utilization technology in the sun power, particularly a kind of molten salt creosote thermal transmission heat storage medium and preparation method thereof and application.
Background technology
Sun power has intermittent and can not stablize the shortcoming of supply, can not satisfy the requirement of the continuous energy supply of heavy industrialization.For conversion, storage and the transport issues that solves renewable energy source effectively, must development efficient heat transfer heat storage technology.In the high temperature heat utilization technology, the heat transfer heat storage medium that uses mainly contains at present: metals such as air, mixing oil, water/steam, sodium and aluminium, molten salts etc. in sun power.Wherein, melting salt can reach higher temperature as heat-transfer medium, has heat accumulation function simultaneously, can also overcome because therefore the problems such as steam parameter instability that obnubilation brings are to use more, comparatively sophisticated heat transfer heat storage medium at present.
Practical application is had relatively high expectations to medium of fused salt, must satisfy various thermodynamics, chemistry and economy condition.Wherein, thermodynamic condition requires: alap fusing point to reduce the insulation energy consumption, makes melting salt be difficult for condensing; High as far as possible boiling point makes melting salt have wide use temperature scope, to improve the efficiency of heat engine of system; Good heat conductivity is decomposed because of local superheating when the accumulation of heat to prevent melting salt, and is made it can effectively provide heat when heat supply; Specific heat capacity is big, makes melting salt consumption under identical heat transfer capacity less; Viscosity is low, makes the melting salt good fluidity, to reduce pump delivery power.Electrochemical conditions requires: Heat stability is good makes melting salt can use long-term stable operation repeatedly; Corrodibility is little, makes melting salt and container, piping material consistency good; Nontoxic and nonflammable explosive, security of system is reliable.The economy conditional request: molten salt components cheaply is easy to get, cheap.Existing mixed nitrate fused salt has low, the Heat stability is good of fusing point, to characteristics such as container and piping material corrodibility is little, relatively is suitable as solar energy thermal-power-generating heat transfer heat storage medium.Yet the nitric acid fused salt at high temperature decomposes easily, and its upper limit use temperature generally is no more than 600 ℃, and the solar energy high temperature that is not suitable in 600～800 ℃ of scopes is used.Therefore, be necessary to develop the heat transfer heat-storing material that is used for the utilization of sun power high temperature.Alkaline carbonate fusing point height, Heat stability is good are the first-selected fused salt materials of this temperature range.
At present, the research about the carbonic acid fused salt both at home and abroad mainly concentrates on fuel cells applications, also has a small amount of research to attempt reclaiming nuke rubbish with the carbonic acid fused salt, and also relatively more rare as the research of solar thermal utilization heat transfer heat-storing material the carbonic acid fused salt.
Summary of the invention
The objective of the invention is to prepare a kind of Heat stability is good, can be in 600～800 ℃ of scopes works better, production cost is low, can be used for high temperature heat utilization technology in the sun power, especially for the molten salt creosote thermal transmission heat storage medium of solar heat chemical reactor.
Another object of the present invention is to provide a kind of preparation method of above-mentioned molten salt creosote thermal transmission heat storage medium.
Another object of the present invention is to provide a kind of application of above-mentioned molten salt creosote thermal transmission heat storage medium.
Purpose of the present invention is achieved through the following technical solutions: a kind of molten salt creosote thermal transmission heat storage medium comprises following component by mass percentage:
Salt of wormwood 35～80%
Yellow soda ash 35～80%
Additive 10～40%
Wherein, described additive is (0.1～0.9) by mass percent: 1 sodium-chlor and Repone K are formed.
Preferred 40～50% (mass percents) of described salt of wormwood.In this scope, mixed melting salt has lower fusing point than other scope, can reduce the insulation energy consumption better like this, makes melting salt be difficult for condensing.
Preferred 40～50% (mass percents) of described yellow soda ash.In this scope, mixed melting salt has lower fusing point than other scope, can reduce the insulation energy consumption better like this, makes melting salt be difficult for condensing.
Preferred 28～31% (mass percents) of described additive.Additive level is lower than 28%, and it is maximum that the latent heat of phase change of mixed melting salt does not reach; The thermophysical property that additive level is higher than 31% pair of mixed melting salt changes not quite, but the price of mixed melting salt is increased.
The preparation method of described fusion tray of thermal transmission and storage medium comprises the steps:
(1) be (0.1～0.9) with mass ratio: 1 sodium-chlor and Repone K mix and stir, and static state is heated to the whole fusions of solid, is incubated 10～30 minutes then, naturally cools to room temperature again, obtains described additive;
(2) be that 35～80% salt of wormwood, 35～80% yellow soda ash, 10～40% additive mix and stir with mass percent, static state is heated to the whole fusions of solid, be incubated 10～30 minutes then, naturally cool to room temperature again, obtain described fusion tray of thermal transmission and storage medium.
This molten salt creosote thermal transmission heat storage medium can be used for the solar heat chemical reactor, especially for solar heat chemical reactor pyrolysis hydrogen manufacturing.
Action principle of the present invention is: adopt additive to binary system (K
2CO
3-Na
2CO
3) carry out modification, contain sodium-chlor and Repone K in the additive that is adopted, can effectively reduce binary system (K
2CO
3-Na
2CO
3) fusing point, strengthen the latent heat of phase change of fused salt, improve the heat storage capacity of fused salt.The fusing point of sodium-chlor and Repone K and stability can improve the safe handling upper temperature limit of molten salt system all than higher.The latent heat of phase change of sodium-chlor and Repone K is big, can effectively increase melting salt system latent heat of phase change.
The present invention compared with prior art has following advantage and effect:
(1) the working temperature upper limit and the K of the molten salt creosote thermal transmission heat storage medium of the present invention's preparation
2CO
3-Na
2CO
3Binary system is compared, and is constant substantially, but latent heat of phase change is big, good heat-transfer, Heat stability is good, can be in 600～800 ℃ of scopes works better, it is constant substantially that the additive that is added can be kept the melting salt working temperature upper limit.
(2) fusing point of the molten salt creosote thermal transmission heat storage medium of the present invention's preparation is 567 ℃, compares K
2CO
3-Na
2CO
3Binary system (698 ℃ of fusing points) is low, and the additive that is added can make (K
2CO
3-Na
2CO
3) fusing point of binary system reduces about 131 ℃, widened the operating temperature range of fusion tray of thermal transmission and storage medium, satisfies desired 600～800 ℃ of operating temperature ranges of solar heat chemical reactor.
(3) latent heat of phase change of the fusion tray of thermal transmission and storage medium of the present invention's preparation can compare K up to 103J/g
2CO
3-Na
2CO
3The 34J/g of binary system has improved 3 times, makes the size of system greatly reduce, the capacity usage ratio height.
Description of drawings
Fig. 1 is unmodified and the differential scanning of embodiment 1 modification melting salt (DSC) curve.
Fig. 2 is the DSC curve of embodiment 3 modification melting salts.
Fig. 3 is the DSC curve of embodiment 5 modification melting salts.
Fig. 4 is the DSC curve of embodiment 7 modification melting salts.
Fig. 5 is unmodified and the thermostability curve of modification melting salt under 850 ℃ of embodiment 1,3,5,7 preparations.
Fig. 6 is unmodified and the thermostability curve of modification melting salt under 900 ℃ of embodiment 1,3,5,7 preparations.
Embodiment
Below in conjunction with embodiment the present invention is done further detailed description, but embodiments of the present invention are not limited thereto.
With mass ratio is that 0.1: 1 sodium-chlor and Repone K mix and stirs, and static state is heated to the whole fusions of solid, is incubated 10 minutes then, naturally cools to room temperature again, obtains described additive.
With mass percent is that 37% salt of wormwood, 53% yellow soda ash, 10% described additive mix and stir, static state is heated to the whole fusions of solid, be incubated 10 minutes then, naturally cool to room temperature again, obtain described modification fusion tray of thermal transmission and storage medium.
The carbonate molten for preparing is carried out fusing point, latent heat of phase change test.Test adopts general differential scanning (DSC) instrument to carry out.The DSC curve that test obtains is shown in Fig. 1 curve b.Adopt same procedure that unmodified fused salt is tested, the DSC curve that test obtains is shown in Fig. 1 curve a.Test result shows that the fusing point of the modification carbonate molten of the present invention's preparation is than having reduced by 139 ℃ before unmodified, and latent heat of phase change slightly increases.Illustrate that additive can make the use temperature lower limit of fused salt obviously reduce.
Thermal stability to the medium of fused salt for preparing is tested.Test adopts weighting method to carry out: in silicon carbide crucible, add prepared melting salt, weigh with analytical balance, static state is heated to the whole fusions of solid and makes the temperature of melting salt reach 850 ℃ then, be incubated 5 hours, naturally cool to room temperature and take out, weigh with analytical balance again, calculate the rate of loss and the surplus ratio of melting salt after the insulation 5 hours.Repeated experiments allows the holding temperature be 850 ℃, and soaking time was respectively 10,15,20 and 25 hours, counting loss rate and surplus ratio.With surplus ratio soaking time is mapped, obtain the rate of loss curve, as the curve b among Fig. 5.Changing holding temperature is 900 ℃, and repeated experiments obtains the curve b in the rate of loss graphic representation 6.Adopt aforesaid method to unmodified fused salt, under 850 ℃ and 900 ℃, test respectively, make the rate of loss curve according to test data, shown in Fig. 5 curve a and Fig. 6 curve a.
Comparison diagram 5 curve a and curve b be as can be seen: the fused salt after the modification is 850 ℃ of operations 25 hours down, and the component rate of loss is 5%, reduces by 3 percentage points than unmodified component rate of loss 8%.Comparison diagram 6 curve a and curve b as can be seen, fused salt is 900 ℃ of down operations 25 hours after the modification, the component rate of loss reaches 8%, but the rate of loss of unmodified fused salt also has 11%, the two differs still is 3%.The fused salt that the present embodiment preparation is described can improve fused salt to a certain extent 850 ℃ of stability of moving down.Improve operating temperature, the rate of loss of modification and unmodified fused salt increases synchronously.
As seen, additive of the present invention can not only reduce the fusing point of melting salt significantly, can improve the thermostability of melting salt simultaneously.
Embodiment 2
With mass ratio is that 0.6: 1 sodium-chlor and Repone K mix and stirs, and static state is heated to the whole fusions of solid, is incubated 30 minutes then, naturally cools to room temperature again, obtains described additive.
With mass percent is that 45% salt of wormwood, 39% yellow soda ash, 16% described additive mix and stir, static state is heated to the whole fusions of solid, be incubated 10 minutes then, naturally cool to room temperature again, obtain described modification fusion tray of thermal transmission and storage medium.
Fusing point, latent heat of phase change to melting salt are tested.Testing method is with embodiment 1.Test result shows that the fusing point of modification melting salt is compared with example 1 and changed not quite, and latent heat of phase change has largely to be increased.
Thermal stability to medium of fused salt is tested.Testing method is with embodiment 1.The result shows, compares with embodiment 1, increases additive amount, and modification melting salt thermostability is further improved.
Embodiment 3
With mass ratio is that 0.2: 1 sodium-chlor and Repone K mix and stirs, and static state is heated to the whole fusions of solid, is incubated 15 minutes then, naturally cools to room temperature again, obtains described additive.
With mass percent is that 34% salt of wormwood, 46% yellow soda ash, 20% described additive mix and stir, static state is heated to the whole fusions of solid, be incubated 10 minutes then, naturally cool to room temperature again, obtain described modification fusion tray of thermal transmission and storage medium.
Fusing point, latent heat of phase change to melting salt are tested.Testing method is with embodiment 1.The DSC curve of test as shown in Figure 2.The result shows, it is also little that the fusing point of the prepared modification melting salt of this example and example 1 are compared variation, and latent heat of phase change has again largely than example 2 to be increased, and reaches 78J/g.
Thermal stability to medium of fused salt is tested.Testing method is with embodiment 1.The result shows, compares with embodiment 1, increases additive amount, and modification melting salt thermostability is further improved, and sees the curve c among Fig. 5 and Fig. 6.
Embodiment 4
With mass ratio is that 0.8: 1 sodium-chlor and Repone K mix and stirs, and static state is heated to the whole fusions of solid, is incubated 20 minutes then, naturally cools to room temperature again, obtains described additive.
With mass percent is that 46% salt of wormwood, 30% yellow soda ash, 24% described additive mix and stir, static state is heated to the whole fusions of solid, be incubated 10 minutes then, naturally cool to room temperature again, obtain described modification fusion tray of thermal transmission and storage medium.
Fusing point, latent heat of phase change to melting salt are tested.Testing method is with embodiment 1.Test result shows that the fusing point of the prepared modification melting salt of this example is compared with example 1 and changed still not quite, and latent heat of phase change is also increasing.
Thermal stability to medium of fused salt is tested.Testing method is with embodiment 1.The result shows, compares with embodiment 1, increases additive amount, and modification melting salt thermostability is further improved.
As seen, the consumption of continuation increasing additive also can improve the latent heat of phase change of melting salt.
With mass ratio is that 0.1: 1 sodium-chlor and Repone K mix and stirs, and static state is heated to the whole fusions of solid, is incubated 25 minutes then, naturally cools to room temperature again, obtains described additive.
With mass percent is that 29% salt of wormwood, 42% yellow soda ash, 29% described additive mix and stir, static state is heated to the whole fusions of solid, be incubated 10 minutes then, naturally cool to room temperature again, obtain described modification fusion tray of thermal transmission and storage medium.
Fusing point, latent heat of phase change to melting salt are tested.Testing method is with embodiment 1.The DSC curve of test as shown in Figure 3.The result shows, it is also little that the fusing point of the prepared modification melting salt of this example and example 1 are compared variation, and latent heat of phase change reaches 103J/g, is that 34J/g compares with unmodified fused salt latent heat of phase change, and latent heat of phase change has increased 3 times.
Thermal stability to medium of fused salt is tested.Testing method is with embodiment 1.The result shows, compares with embodiment 1, increases additive amount, and modification melting salt thermostability is further improved, and sees the curve d among Fig. 5 and Fig. 6.
Embodiment 6
With mass ratio is that 0.5: 1 sodium-chlor and Repone K mix and stirs, and static state is heated to the whole fusions of solid, is incubated 20 minutes then, naturally cools to room temperature again, obtains described additive.
With mass percent is that 42% salt of wormwood, 24% yellow soda ash, 34% described additive mix and stir, static state is heated to the whole fusions of solid, be incubated 10 minutes then, naturally cool to room temperature again, obtain described modification fusion tray of thermal transmission and storage medium.
Fusing point, latent heat of phase change to melting salt are tested.Testing method is with embodiment 1.Test result shows, it is all little that the fusing point of the prepared modification melting salt of this example and latent heat of phase change and example 5 are compared variation.
Thermal stability to medium of fused salt is tested.Testing method is with embodiment 1.The result shows, compares with embodiment 1, increases additive amount, and modification melting salt thermostability is further improved.
As seen, the consumption of continuation increasing additive can not improve the latent heat of phase change of melting salt again.
Embodiment 7
With mass ratio is that 0.2: 1 sodium-chlor and Repone K mix and stirs, and static state is heated to the whole fusions of solid, is incubated 20 minutes then, naturally cools to room temperature again, obtains described additive.
With mass percent is that 27% salt of wormwood, 33% yellow soda ash, 40% described additive mix and stir, static state is heated to the whole fusions of solid, be incubated 10 minutes then, naturally cool to room temperature again, obtain described modification fusion tray of thermal transmission and storage medium.
Fusing point, latent heat of phase change to melting salt are tested.Testing method is with embodiment 1.The DSC curve of test as shown in Figure 4.The result shows, it is also little that the fusing point of the prepared modification melting salt of this example and example 1 are compared variation, latent heat of phase change 104J/g, and to compare variation also very little with example 5.
Thermal stability to medium of fused salt is tested.Testing method is with embodiment 1.The result shows, compares with embodiment 1, further increases additive amount, and modification melting salt thermostability is further improved, and sees the curve e among Fig. 5 and Fig. 6.
As seen, with regard to the thermal physical characteristic of melting salt, the optimum amount of additive is 29%, no matter surpassed the fusing point and the latent heat of phase change of optimum amount to fused salt, still to thermostability, does not all have further obviously to improve.Take all factors into consideration factors such as the price of salt and thermophysical property, the amount ranges of additive is 28～31%.
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention are 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 (9)
1, a kind of molten salt creosote thermal transmission heat storage medium is characterized in that: comprise following component by mass percentage:
Salt of wormwood 35～80
Yellow soda ash 35～80%
Additive 10～40%
Wherein, described additive is (0.1～0.9) by mass percent: 1 sodium-chlor and Repone K are formed.
2, molten salt creosote thermal transmission heat storage medium according to claim 1 is characterized in that: described salt of wormwood mass percent is 40～50%.
3, molten salt creosote thermal transmission heat storage medium according to claim 1 is characterized in that: described yellow soda ash mass percent is 40～50%.
4, molten salt creosote thermal transmission heat storage medium according to claim 1 is characterized in that: described additive mass percent is 28～31%.
5, a kind of method for preparing each described fusion tray of thermal transmission and storage medium of claim 1～5 is characterized in that comprising the steps:
(1) be (0.1～0.9) with mass ratio: 1 sodium-chlor and Repone K mix and stir, and static state is heated to the whole fusions of solid, is incubated 10～30 minutes then, naturally cools to room temperature again, obtains described additive;
(2) be that 35～80% salt of wormwood, 35～80% yellow soda ash, 10～40% additive mix and stir with mass percent, static state is heated to the whole fusions of solid, be incubated 10～30 minutes then, naturally cool to room temperature again, obtain described fusion tray of thermal transmission and storage medium.
6, the preparation method of molten salt creosote thermal transmission heat storage medium according to claim 5 is characterized in that: described salt of wormwood mass percent is 35～80%.
7, the preparation method of molten salt creosote thermal transmission heat storage medium according to claim 5 is characterized in that: described yellow soda ash mass percent is 35～80%.
8, the preparation method of molten salt creosote thermal transmission heat storage medium according to claim 5 is characterized in that: described additive mass percent is 10～40%.
9, according to the application of each described fusion tray of thermal transmission and storage medium of claim 1～5, it is characterized in that: be used for the solar heat chemical reactor, be particularly useful for solar heat chemical reactor pyrolysis hydrogen manufacturing.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2008100276389A CN100551991C (en) | 2008-04-23 | 2008-04-23 | A kind of molten salt creosote thermal transmission heat storage medium and preparation method thereof and application |
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|---|---|---|---|
| CNB2008100276389A CN100551991C (en) | 2008-04-23 | 2008-04-23 | A kind of molten salt creosote thermal transmission heat storage medium and preparation method thereof and application |
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| CN101508888B (en) * | 2009-02-24 | 2011-05-11 | 中山大学 | Lithium-containing molten salt creosote thermal transmission heat storage medium, preparation and uses thereof |
| CN102197267A (en) * | 2008-10-27 | 2011-09-21 | 三井造船株式会社 | Method for controlling heliostat used for condensing of sunlight and device thereof |
| CN102533226A (en) * | 2011-12-15 | 2012-07-04 | 中山大学 | Nitrate molten salt heat transferring and reserving medium and preparation method and application thereof |
| CN103017367A (en) * | 2013-01-16 | 2013-04-03 | 南京工业大学 | Tower-type solar composite plate-fin heat receiver with novel support structure and hot plates |
| CN103911120A (en) * | 2013-12-26 | 2014-07-09 | 深圳市爱能森科技有限公司 | Quartz sand-molten carbonate composite heat-transfer heat-storage medium and preparation method thereof |
| CN103911126A (en) * | 2013-12-26 | 2014-07-09 | 深圳市爱能森科技有限公司 | Sodium silicate-molten carbonate composite heat-transfer heat-storage medium and its preparation method and use |
| CN104479645A (en) * | 2014-11-15 | 2015-04-01 | 北京工业大学 | Mixed carbonate heat transfer and heat storage working medium |
| CN105778870A (en) * | 2016-04-25 | 2016-07-20 | 碧城（上海）新能源科技有限公司 | Mixed molten salt heat conduction and storage medium and preparation method thereof |
| CN105838337A (en) * | 2016-04-25 | 2016-08-10 | 碧城（上海）新能源科技有限公司 | Nano mixed molten salt heat transfer and storage medium with high specific heat and preparation method thereof |
| WO2016199454A1 (en) * | 2015-06-10 | 2016-12-15 | 綜研テクニックス株式会社 | Molten-salt type heat medium, method for using molten-salt type heat medium, and solar heat utilization system |
| CN113441092A (en) * | 2021-08-12 | 2021-09-28 | 成都市润和盛建石化工程技术有限公司 | Propane dehydrogenation method and system adopting tube array type fixed bed molten salt heating reactor |
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| CN102197267A (en) * | 2008-10-27 | 2011-09-21 | 三井造船株式会社 | Method for controlling heliostat used for condensing of sunlight and device thereof |
| CN102197267B (en) * | 2008-10-27 | 2013-12-04 | 三井造船株式会社 | Method for controlling heliostat used for condensing of sunlight and device thereof |
| CN101508888B (en) * | 2009-02-24 | 2011-05-11 | 中山大学 | Lithium-containing molten salt creosote thermal transmission heat storage medium, preparation and uses thereof |
| CN102533226A (en) * | 2011-12-15 | 2012-07-04 | 中山大学 | Nitrate molten salt heat transferring and reserving medium and preparation method and application thereof |
| CN103017367A (en) * | 2013-01-16 | 2013-04-03 | 南京工业大学 | Tower-type solar composite plate-fin heat receiver with novel support structure and hot plates |
| CN103017367B (en) * | 2013-01-16 | 2015-11-18 | 南京工业大学 | With the tower type solar composite plate wing hot plate type heat dump of Novel support structure |
| CN103911126A (en) * | 2013-12-26 | 2014-07-09 | 深圳市爱能森科技有限公司 | Sodium silicate-molten carbonate composite heat-transfer heat-storage medium and its preparation method and use |
| CN103911120A (en) * | 2013-12-26 | 2014-07-09 | 深圳市爱能森科技有限公司 | Quartz sand-molten carbonate composite heat-transfer heat-storage medium and preparation method thereof |
| CN103911120B (en) * | 2013-12-26 | 2017-01-11 | 深圳市爱能森科技有限公司 | Quartz sand-molten carbonate composite heat-transfer heat-storage medium and preparation method thereof |
| CN104479645A (en) * | 2014-11-15 | 2015-04-01 | 北京工业大学 | Mixed carbonate heat transfer and heat storage working medium |
| WO2016199454A1 (en) * | 2015-06-10 | 2016-12-15 | 綜研テクニックス株式会社 | Molten-salt type heat medium, method for using molten-salt type heat medium, and solar heat utilization system |
| CN105778870A (en) * | 2016-04-25 | 2016-07-20 | 碧城（上海）新能源科技有限公司 | Mixed molten salt heat conduction and storage medium and preparation method thereof |
| CN105838337A (en) * | 2016-04-25 | 2016-08-10 | 碧城（上海）新能源科技有限公司 | Nano mixed molten salt heat transfer and storage medium with high specific heat and preparation method thereof |
| CN113441092A (en) * | 2021-08-12 | 2021-09-28 | 成都市润和盛建石化工程技术有限公司 | Propane dehydrogenation method and system adopting tube array type fixed bed molten salt heating reactor |
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