CN110257020A - A kind of phase-changing energy storage material and preparation method thereof with two-phase changing temperature degree - Google Patents
A kind of phase-changing energy storage material and preparation method thereof with two-phase changing temperature degree Download PDFInfo
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- CN110257020A CN110257020A CN201910572839.5A CN201910572839A CN110257020A CN 110257020 A CN110257020 A CN 110257020A CN 201910572839 A CN201910572839 A CN 201910572839A CN 110257020 A CN110257020 A CN 110257020A
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- C09K5/02—Materials undergoing a change of physical state when used
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Abstract
The invention discloses a kind of phase-changing energy storage material and preparation method thereof with two-phase changing temperature degree.The phase-changing energy storage material includes following components by weight: 55-70 parts of material of main part, 70-100 parts of solvent, and the first 10-25 parts of cooling agent, the second 2-10 parts of cooling agent, 5-10 parts of nucleating agent, 2-150 parts of thickener.The preparation method includes: to mix the material of main part raw material of formula ratio, solvent, the first cooling agent, the second cooling agent, nucleating agent and thickener, obtains the phase-changing energy storage material with two-phase changing temperature degree.Phase-changing energy storage material provided by the invention with two-phase changing temperature degree is because have good matching relationship between each component, therefore there are two phase transition temperatures for tool, the decaying that enthalpy of phase change is generated with the increase of cycle-index simultaneously is less, applicable temperature range is wider, the demand of wide scope refrigeration is can satisfy, and low in cost.
Description
Technical field
The invention belongs to energy storage material technical field, a kind of phase-changing energy storage material and preparation method thereof is designed, more particularly to
A kind of phase-changing energy storage material and preparation method thereof with two-phase changing temperature degree.
Background technique
As world energy sources crisis is got worse, energy-saving and emission-reduction are imperative.Cool Storage Technology " is moved because it can be realized power grid
Peak load " causes the interest of domestic and foreign scholars in recent years.Cool Storage Technology is in food low-temperature processing, cryopreservation, air conditioner refrigerating etc.
Many-sided be all widely used background and energy-saving potential.
Phase-change accumulation energy is the storage and utilization that energy is realized using the latent heat of phase change of material, be alleviate energy supply and demand when
Between, unmatched effective means in place and intensity.The core of phase change energy storage technology is phase-change material (Phase change
Materials, PCM), it is the material in phase transition process along with energy absorption and release, absorbs or the energy of release claims
For latent heat of phase change, phase transformation is only dependent upon temperature, can be widely applied to temperature control field.
Phase-change material studied both at home and abroad at present is concentrated mainly on solid-liquid phase change material, including crystalline hydrate salt inorganic phase
Become material and paraffin, ester, polyalcohol and polymer etc..At present phase-change material building cooling supply heating, peak load shifting,
Each field such as solar energy is widely used.With the development of technology, phase-change material has obtained good development in low temperature field,
Good application has been obtained in fields such as icebox, the transport of temperature sensitive product, air-conditionings.
There are many type of phase-change material, and existence form is also varied.It is divided by the range of phase transition temperature: high-temperature phase-change material
Expect (250 DEG C of >), medium temperature phase-change material (100~250 DEG C) and low-temperature phase-change material (100 DEG C of <).
However existing low-temperature phase-change material, in the prevalence of at high cost, preparation process is cumbersome, enthalpy of phase change is with circulation time
The problem of number decaying is serious and is unable to satisfy different temperatures demand.
CN102925115A discloses a kind of phase-changing energy storage material applied to air conditioning cooling water system.The preparation of the program
Method is that anhydrous sodium sulfate and 40 DEG C of water be configured to sal glauberi solution according to the mass ratio of 1:1.28, then thereto
Other additives are added, is fitted into sealing shell is cooled and shaped after mixing evenly, form sal glauberi phase-change accumulation energy system.Add
Agent type and its mass fraction in sal glauberi phase-change accumulation energy system is added to be respectively as follows: borax 3%, sodium carboxymethylcellulose
1.5%, gas-phase silica 1%, calgon 1%, sodium chloride 4%.But this method phase transition temperature is 26~28 DEG C, it can not
Meets the demand of the needs of different temperatures and wide scope refrigeration.
CN1803965A discloses a kind of preparation process of organic salt/ceramic base high temperature phase-changing energy-storing material, the preparation work
Skill is prepared using the method for addition pore creating material with three-dimensional communication ultra microstructure porous ceramic preforms, then by phase transformation first
Latent heat heat accumulating inorganic salts are warming up to complete melting in normal pressure resistance furnace, are rapidly immersed precast body, melt inorganic
Salt is soaked due to having good wetability to precast body, and because of the effect of capillary tension in spontaneous infiltration porous ceramic preforms
Room temperature is cooled to the furnace after seeping a period of time, implements surface and salt treatment is gone to get product.The processing step is cumbersome, is melted
Melt, energy consumption is high, at high cost.
CN107201215A discloses a kind of low-temperature inorganic phase-changing energy storage material and preparation method thereof.The low-temperature inorganic phase
Change energy-storage material includes following component: main body phase-change material 70~98%, temperature depressant A0.5~15%, temperature depressant B
0.5~15%, thickener 0.5~5%, nucleating agent 0.5~5%.But the program needs to prepare using the method for melting
Phase-change material is obtained, energy consumption is high, at high cost.
Summary of the invention
Aiming at the above shortcomings existing in the prior art, the purpose of the present invention is to provide a kind of with two-phase changing temperature degree
Phase-changing energy storage material and preparation method thereof.Phase-changing energy storage material provided by the invention has two-phase changing temperature degree, this makes it have two
A to use temperature range, applicable temperature range is wider, can satisfy the demand of wide scope refrigeration.
To achieve this purpose, the present invention adopts the following technical scheme:
In a first aspect, the present invention provides a kind of phase-changing energy storage material with two-phase changing temperature degree, the phase-changing energy storage material
By weight include following components:
55-70 parts of material of main part
70-100 parts of solvent
First 10-25 parts of cooling agent
Second 2-10 parts of cooling agent
5-10 parts of nucleating agent
80-150 parts of thickener.
In phase-changing energy storage material provided by the invention with two-phase changing temperature degree, by weight, material of main part 55-70
Part, such as 55 parts, 58 parts, 60 parts, 65 parts, 67 parts or 70 parts etc., it is not limited to cited numerical value, in the numberical range
Other unlisted numerical value are equally applicable；Solvent be 70-100 parts, such as 70 parts, 75 parts, 80 parts, 85 parts, 90 parts, 95 parts or
100 parts etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are equally applicable；First drop
Warm agent is 10-25 parts, such as 10 parts, 15 parts, 20 parts or 25 parts etc., it is not limited to cited numerical value, the numberical range
Other interior unlisted numerical value are equally applicable；Second cooling agent is 2-10 parts, such as 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8
Part, 9 parts or 10 parts etc., it is not limited to cited numerical value, other unlisted numerical value are equally applicable in the numberical range；
Nucleating agent is 5-10 parts, such as 5 parts, 6 parts, 7 parts, 8 parts, 9 parts or 10 parts etc., it is not limited to cited numerical value, the number
It is equally applicable to be worth other unlisted numerical value in range；Thickener be 2-150 parts, such as 2 parts, 10 parts, 20 parts, 30 parts, 40 parts,
50 parts, 60 parts, 70 parts, 80 parts, 90 parts, 100 parts, 110 parts, 120 parts, 130 parts, 140 parts or 150 parts etc., it is not limited to
Cited numerical value, other interior unlisted numerical value of the numberical range are equally applicable.
In phase-changing energy storage material provided by the invention, each component have mutually matched relationship, their collective effects so that
Phase-changing energy storage material provided by the invention has two-phase changing temperature degree, while as cycle-index increase enthalpy of phase change decaying is less.Tool
For body, the first cooling agent and the second cooling agent cooperate, and their contents in phase-changing energy storage material are in above-mentioned model
In enclosing, for realizing that it is key that two-phase changing temperature degree plays the role of, if the first cooling agent or the second drop in phase-changing energy storage material
The content of warm agent within the above range, not will be unable to realize two-phase changing temperature degree；The effect of material of main part is to provide enthalpy of phase change and storage
It can material core material；The effect of solvent is core material and assists preparing uniform mixture；The effect of nucleating agent is help
Crystallization, storage of cold；The effect of thickener is that adjustment viscosity prevents from mutually separating, and reduces the decaying of enthalpy of phase change.
Phase-changing energy storage material provided by the invention with two-phase changing temperature degree is low-temperature phase-change energy-storing material.
In addition, the phase-changing energy storage material provided by the invention with two-phase changing temperature degree is low in cost, in low temperature process, low temperature
Storage, many-sided be all widely used background and the energy-saving potential such as air conditioner refrigerating.
It is used as currently preferred technical solution below, but not as the limitation to technical solution provided by the invention, leads to
Following preferred technical solution is crossed, can preferably reach and realize technical purpose and beneficial effect of the invention.
As currently preferred technical solution, the material of main part includes sodium sulphate.
Preferably, first cooling agent is ammonium chloride and/or ammonium sulfate.
Preferably, second cooling agent is potassium chloride and/or potassium sulfate.
In the present invention, the first cooling agent selects ammonium chloride, and the second cooling agent selects potassium chloride effect more excellent.
Preferably, the parts by weight of first cooling agent are greater than the parts by weight of the second cooling agent；
In the present invention, when the first cooling agent be ammonium chloride, the second cooling agent be potassium chloride, and the two ratio be suitable for when,
The phase-changing energy storage material that can make has obviously two-phase changing temperature degree.
Preferably, the solvent includes water.
Preferably, the nucleating agent includes borax.
Preferably, the thickener is inorganic thickening agent and/or organic thickening agent.
Preferably, the inorganic thickening agent includes any one in bentonite, palygorskite or sepiolite or at least two
Combination.In the present invention, using the inorganic thickening agent of mentioned kind, more compared to polymer viscosifier (such as Sodium Polyacrylate)
Add stabilization, and the decaying that enthalpy of phase change is generated as cycle-index increases can be reduced, promotes the phase of the two-phase changing temperature degree
The enthalpy of phase change of change energy-storage material, while cost is relatively low.
Preferably, the bentonite includes calcium-base bentonite and/or sodium bentonite.
Preferably, the partial size of the inorganic thickening agent is 23-38 μm, such as 23 μm, 25 μm, 37 μm, 30 μm, 32 μm, 35 μ
M or 38 μm etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are equally applicable.I.e. without
Particle size range between the preferred 400-600 mesh screen of the partial size of machine thickener.
Preferably, the organic thickening agent includes Sodium Polyacrylate and/or methyl hydroxyethylcellulose.
Preferably, when the thickener is inorganic thickening agent, the parts by weight of the inorganic thickening agent are 80-150 parts, example
Such as 80 parts, 90 parts, 100 parts, 110 parts, 120 parts, 130 parts, 140 parts or 150 parts, it is not limited to cited numerical value,
Other unlisted numerical value are equally applicable in the numberical range.
Preferably, when the thickener is organic thickening agent, the parts by weight of the organic thickening agent are 2-9 parts, such as 2
Part, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts or 9 parts etc., it is not limited to cited numerical value, in the numberical range, other are not
The numerical value enumerated is equally applicable.
As currently preferred technical solution, the phase-changing energy storage material further includes thickening aids, the thickening aids
Parts by weight be 5-10 part, such as 5 parts, 6 parts, 7 parts, 8 parts, 9 parts or 10 parts etc., it is not limited to cited numerical value, this
Other unlisted numerical value are equally applicable in numberical range.In the present invention, because viscosity is for described with two-phase changing temperature degree
The performance of phase-changing energy storage material also has the function of important, therefore thickening aids can be added to adjust viscosity, but thicken
Auxiliary agent obtains having the phase-changing energy storage material of two-phase changing temperature degree not necessarily for the present invention.
Preferably, the thickening aids include calgon.Auxiliary thickening power can be played using calgon
And its property is relatively stable, is conducive to the overall stability for improving the phase-changing energy storage material with two-phase changing temperature degree, reduces
The decaying that enthalpy of phase change is generated as cycle-index increases.
As currently preferred technical solution, the phase-changing energy storage material includes following components by weight:
60-65 parts of material of main part
80-90 parts of solvent
First 15-20 parts of cooling agent
Second 5-8 parts of cooling agent
6-8 parts of nucleating agent
100-130 parts of inorganic thickening agent
7-9 parts of thickening aids.
Phase-changing energy storage material performance provided by the invention with two-phase changing temperature degree can be made more using said components formula
Add excellent.
As currently preferred technical solution, the two-phase changing temperature degree of the phase-changing energy storage material is respectively the first phase alternating temperature
Degree and the second phase transition temperature, first phase transition temperature are higher than the second phase transition temperature, and first phase transition temperature is 12-14 DEG C,
Such as 12 DEG C, 12.5 DEG C, 13 DEG C, 13.5 DEG C or 14 DEG C etc., it is not limited in cited numerical value, other are not in the numberical range
The numerical value enumerated is equally applicable.
Preferably, the second phase transition temperature of the phase-changing energy storage material is 5-6 DEG C, such as 5 DEG C, 5.2 DEG C, 5.5 DEG C, 5.8
DEG C or 6 DEG C etc., be not limited in cited numerical value, other unlisted numerical value are equally applicable in the numberical range.
Second aspect, the present invention provide a kind of system of phase-changing energy storage material with two-phase changing temperature degree as described in relation to the first aspect
Preparation Method the described method comprises the following steps:
The material of main part raw material of formula ratio, solvent, the first cooling agent, the second cooling agent, nucleating agent and thickener are mixed,
Obtain the phase-changing energy storage material with two-phase changing temperature degree.
Preparation method provided by the invention is easy to operate, at low cost, is suitable for industrialization and is mass produced.
As currently preferred technical solution, after material of main part raw material is is mixed by the mixed sequence with solvent,
Sequentially add the first cooling agent, the second cooling agent, nucleating agent and thickener.It is advantageous in that using said sequence, is stirred in machinery
Under the influence of mixing, material of main part and solvent are sufficiently mixed and generate the more uniform mixture of dispersion ratio, sequentially add soluble
First cooling agent and the second cooling agent, mixture do not agglomerate, and are uniformly dispersed.Add the nucleating agent that can not be dissolved and thickening
Agent is conducive to reach thickening purpose in material of main part and the relatively good pore structure into inorganic thickening agent of cooling agent, prevent phase
Isolated effect.
Preferably, the material of main part raw material is free of the crystallization water.
Preferably, the material of main part raw material includes anhydrous sodium sulfate.
As currently preferred technical solution, the preparation method further include: thickening aids are added.
Preferably, the mixed sequence be material of main part raw material is mixed with solvent after, sequentially add the first cooling agent,
Second cooling agent, nucleating agent, thickening aids and thickener.
As currently preferred technical solution, the mixing is with stirring.
Preferably, the rate of the stirring be 400-600r/min, such as 400r/min, 450r/min, 500r/min,
550r/min or 600r/min etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are same
Sample is applicable in.
Preferably, the mixed temperature is 30-40 DEG C, such as 30 DEG C, 32 DEG C, 35 DEG C, 38 DEG C or 40 DEG C etc., but not
It is only limitted to cited numerical value, other unlisted numerical value are equally applicable in the numberical range.Above-mentioned temperature is conducive to make main body
Material reaches higher solubility in a solvent, such as sodium sulphate is made to reach higher solubility in water.
Preferably, the mixed time is 1-2h, such as 1h, 1.2h, 1.4h, 1.6h, 1.8h or 2h etc., but simultaneously not only
It is limited to cited numerical value, other unlisted numerical value are equally applicable in the numberical range.
As the further preferred technical solution of preparation method of the present invention, the described method comprises the following steps:
After the material of main part raw material of formula ratio is mixed with solvent, the first cooling agent, the second drop of formula ratio are sequentially added
Warm agent, nucleating agent, thickening aids and thickener, under the stirring of 400-600r/min, with 30-40 DEG C of temperature mixing 1-2h,
Obtain the phase-changing energy storage material with two-phase changing temperature degree.
Compared with prior art, the invention has the following advantages:
(1) phase-changing energy storage material provided by the invention with two-phase changing temperature degree is low-temperature phase-change energy-storing material, because respectively
There is good matching relationship between component, therefore have there are two phase transition temperature, at the same enthalpy of phase change with the increase of cycle-index and
The decaying of generation is less, and applicable temperature range is wider, can satisfy the demand of wide scope refrigeration, and low in cost, low
Warm working, cryopreservation, many-sided be all widely used background and the energy-saving potential such as air conditioner refrigerating.It is provided by the invention to have
Total phase change enthalpy conservation rate of the total phase change enthalpy of the phase-changing energy storage material of two-phase changing temperature degree after 134kJ/kg or more, circulation 1000 times
80% or more.
(2) preparation method provided by the invention is easy to operate, and step is few, and process is short, is easy to carry out industrialization and gives birth on a large scale
It produces.
Detailed description of the invention
Fig. 1 is cooling curve and the water-bath for the phase-changing energy storage material with two-phase changing temperature degree that the embodiment of the present invention 1 provides
Temperature curve；
Fig. 2 is the cooling curve and bath temperature curve for the phase-changing energy storage material that comparative example 1 provides.
Specific embodiment
In order to better illustrate the present invention, it is easy to understand technical solution of the present invention, below further specifically to the present invention
It is bright.But following embodiments is only simple example of the invention, does not represent or limit the scope of the present invention, this
Invention protection scope is subject to claims.
The following are typical but non-limiting embodiments of the invention:
Embodiment 1
The present embodiment provides a kind of phase-changing energy storage materials with two-phase changing temperature degree, and the phase-changing energy storage material is by weight
Meter includes following components:
60 parts of sodium sulphate
80 parts of water
20 parts of ammonium chloride
8 parts of potassium chloride
6 parts of borax
100 parts of calcium-base bentonite (25-36 μm of partial size)
7 parts of calgon
Phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree is prepared according to lower section method is entered:
After the anhydrous sodium sulfate of formula ratio is mixed with water, the ammonium chloride, potassium chloride, borax, six of formula ratio are sequentially added
Sodium metaphosphate and calcium-base bentonite, with 35 DEG C of temperature mixing 1.5h, obtain described with two-phase under the stirring of 500r/min
The phase-changing energy storage material of temperature.
The performance test results of phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree are shown in Table 1.
Fig. 1 is the cooling curve and bath temperature song of the phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree
Line.Here, water-bath makes it generate phase transformation for the cooling phase-changing energy storage material with two-phase changing temperature degree.It can be seen from this figure that
Under the conditions of bath temperature gradually decreases and persistently maintains 2.5 DEG C, the cooling curve of phase-changing energy storage material provided in this embodiment
Occur two platforms respectively at 13 DEG C and 5.5 DEG C, temperature is not reduced with the reduction of bath temperature, implies phase transformation
There are two phase transition temperatures for the generation of journey, i.e. tool.After the completion of whole phase transformations, the phase-changing energy storage material with two-phase changing temperature degree
Temperature continues to reduce, until consistent with the temperature of water-bath.
Embodiment 2
The present embodiment provides a kind of phase-changing energy storage materials with two-phase changing temperature degree, and the phase-changing energy storage material is by weight
Meter includes following components:
65 parts of sodium sulphate
90 parts of water
15 parts of ammonium chloride
5 parts of potassium chloride
8 parts of borax
130 parts of sodium bentonite (23-30 μm of partial size)
9 parts of calgon
Phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree is prepared according to lower section method is entered:
After the anhydrous sodium sulfate of formula ratio is mixed with water, the ammonium chloride, potassium chloride, borax, six of formula ratio are sequentially added
Sodium metaphosphate and sodium bentonite, with 30 DEG C of temperature mixing 2h, obtain described with two-phase change under the stirring of 400r/min
The phase-changing energy storage material of temperature.
The performance test results of phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree are shown in Table 1.
Embodiment 3
The present embodiment provides a kind of phase-changing energy storage materials with two-phase changing temperature degree, and the phase-changing energy storage material is by weight
Meter includes following components:
55 parts of sodium sulphate
70 parts of water
10 parts of ammonium chloride
2 parts of potassium chloride
5 parts of borax
80 parts of sepiolite (30-38 μm of partial size)
5 parts of calgon
Phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree is prepared according to lower section method is entered:
After the anhydrous sodium sulfate of formula ratio is mixed with water, the ammonium chloride, potassium chloride, borax, six of formula ratio are sequentially added
Sodium metaphosphate and sepiolite, with 40 DEG C of temperature mixing 1h, obtain described with two-phase changing temperature degree under the stirring of 600r/min
Phase-changing energy storage material.
The performance test results of phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree are shown in Table 1.
Embodiment 4
The present embodiment provides a kind of phase-changing energy storage materials with two-phase changing temperature degree, and the phase-changing energy storage material is by weight
Meter includes following components:
70 parts of sodium sulphate
100 parts of water
25 parts of ammonium chloride
10 parts of potassium chloride
10 parts of borax
150 parts of palygorskite (23-38 μm of partial size)
10 parts of calgon
After the anhydrous sodium sulfate of formula ratio is mixed with water, the ammonium chloride, potassium chloride, borax, six of formula ratio are sequentially added
Sodium metaphosphate and palygorskite, with 35 DEG C of temperature mixing 1.5h, obtain described with two-phase changing temperature under the stirring of 600r/min
The phase-changing energy storage material of degree.
The performance test results of phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree are shown in Table 1.
Embodiment 5
The present embodiment provides a kind of phase-changing energy storage materials with two-phase changing temperature degree, and the phase-changing energy storage material is by weight
Meter includes following components:
60 parts of sodium sulphate
80 parts of water
20 parts of ammonium chloride
8 parts of potassium chloride
6 parts of borax
100 parts of calcium-base bentonite (25-36 μm of partial size)
This implements the preparation method of the phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree referring to embodiment
1, but it is added without thickening aids calgon.
The performance test results of phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree are shown in Table 1.
Embodiment 6
The present embodiment provides a kind of phase-changing energy storage materials with two-phase changing temperature degree, and the phase-changing energy storage material is by weight
Meter includes following components:
60 parts of sodium sulphate
80 parts of water
20 parts of ammonium chloride
8 parts of potassium chloride
6 parts of borax
2 parts of Sodium Polyacrylate
This implements the preparation method of the phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree referring to embodiment
1, but it is added without thickening aids calgon, and calcium-base bentonite is replaced with to the polypropylene of the present embodiment parts by weight
Sour sodium.
The performance test results of phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree are shown in Table 1.
Embodiment 7
The present embodiment provides a kind of phase-changing energy storage materials with two-phase changing temperature degree, and the phase-changing energy storage material is by weight
Meter includes following components:
60 parts of sodium sulphate
80 parts of water
20 parts of ammonium chloride
8 parts of potassium chloride
6 parts of borax
9 parts of methyl hydroxyethylcellulose
7 parts of calgon
The preparation method reference embodiment 1 of phase-changing energy storage material provided by the embodiment with two-phase changing temperature degree, but will
Calcium-base bentonite replaces with the methyl hydroxyethylcellulose of the present embodiment parts by weight.
The performance test results of phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree are shown in Table 1.
Embodiment 8
The present embodiment provides a kind of phase-changing energy storage materials with two-phase changing temperature degree, and the phase-changing energy storage material is by weight
Meter includes following components:
62 parts of sodium sulphate
83 parts of water
17 parts of ammonium sulfate
6 parts of potassium sulfate
8 parts of borax
110 parts of sodium bentonite (23-30 μm of partial size)
9 parts of calgon
Phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree is prepared according to lower section method is entered:
After the anhydrous sodium sulfate of formula ratio is mixed with water, the ammonium sulfate, potassium sulfate, borax, six of formula ratio are sequentially added
Sodium metaphosphate and sodium bentonite, with 30 DEG C of temperature mixing 2h, obtain described with two-phase change under the stirring of 400r/min
The phase-changing energy storage material of temperature.
The performance test results of phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree are shown in Table 1.
Comparative example 1
The phase-changing energy storage material that this comparative example provides is other than the parts by weight of ammonium chloride are 30 parts, other components type
It is same as Example 1 with the parts by weight of component.
The performance test results for the phase-changing energy storage material that this comparative example provides are shown in Table 1.
Fig. 2 is the cooling curve and bath temperature curve for the phase-changing energy storage material that this comparative example provides.Here, water-bath is used for
Cooling phase-change energy storage material makes it generate phase transformation.It can be seen from this figure that bath temperature gradually decreases and persistently maintains 2.5
Under the conditions of DEG C, the cooling curve for the phase-changing energy storage material that this comparative example provides only in 9 DEG C of appearance, one platform, temperature not with
The reduction of bath temperature and reduce, imply the generation of phase transition process, i.e. only one phase transition temperature.When whole phase transformations is completed
Afterwards, the temperature of phase-changing energy storage material continues to reduce, until consistent with the temperature of water-bath.
Comparative example 2
The phase-changing energy storage material that this comparative example provides is other than the parts by weight of ammonium chloride are 5 parts, other components type
It is same as Example 1 with the parts by weight of component.
The performance test results for the phase-changing energy storage material that this comparative example provides are shown in Table 1.
Comparative example 3
The phase-changing energy storage material that this comparative example provides is other than the parts by weight of potassium chloride are 20 parts, other components type
It is same as Example 1 with the parts by weight of component.
The performance test results for the phase-changing energy storage material that this comparative example provides are shown in Table 1.
Comparative example 4
The phase-changing energy storage material that this comparative example provides is other than the parts by weight of potassium chloride are 0.5 part, other components kind
The parts by weight of class and component are same as Example 1.
The performance test results for the phase-changing energy storage material that this comparative example provides are shown in Table 1.
Comparative example 5
The phase-changing energy storage material that this comparative example provides is other than being added without ammonium chloride, the weight of other components type and component
It is same as Example 1 to measure number.
The performance test results for the phase-changing energy storage material that this comparative example provides are shown in Table 1.
Comparative example 6
The phase-changing energy storage material that this comparative example provides is other than being added without potassium chloride, the weight of other components type and component
It is same as Example 1 to measure number.
The performance test results for the phase-changing energy storage material that this comparative example provides are shown in Table 1.
The performance test results of phase-changing energy storage material provided in this embodiment with two-phase changing temperature degree are shown in Table 1.
Test method
Using differential scanning calorimetry (DSC) method, the phase transformation for the phase-changing energy storage material that each embodiment and comparative example provides is tested
(for there is the sample of two-phase changing temperature degree, total phase change enthalpy is the total of enthalpy of phase change under two phase transition temperatures for temperature and total phase change enthalpy
With).
Using thermostat and multichannel temperature logger, the phase-changing energy storage material that each embodiment and comparative example is provided 0-20 DEG C it
Between the circulation that is heated up and cooled down, and it is each reach 0 DEG C and 20 DEG C of the two temperature spots when keep the temperature 2h, heating rate
Phase-changing energy storage material circulation 1000 times that each embodiment and comparative example offer is provided in 0.4 DEG C/min are controlled with rate of temperature fall
Total phase change enthalpy conservation rate afterwards (i.e. if there is two-phase changing temperature degree, calculates the holding of enthalpy of phase change summation under two phase transition temperatures
Rate).
Test result is as follows shown in table:
Table 1
Based on the above embodiments with comparative example it is found that the phase-change accumulation energy with two-phase changing temperature degree that embodiment 1-4 and 8 is provided
Each component type is suitable in material, and proportion rationally, enables each component sufficiently to cooperate, plays a role jointly, it ensure that real
The phase-changing energy storage material function admirable with two-phase changing temperature degree that a 1-4 and 8 is provided is applied, there is apparent two-phase changing temperature degree, and
And as cycle-index increase enthalpy of phase change decaying is less.
Embodiment 5 is not individually added into thickening aids, only relies on calcium-base bentonite and viscosity is adjusted, but in enthalpy of phase change
With influence smaller on cycle performance, do not influence to use.
Embodiment 6 is similar compared to composition still using the embodiment 1 of inorganic thickening agent using organic thickening agent
Product, the total phase change enthalpy conservation rate after total phase change enthalpy and circulation 1000 times of embodiment 6 have decline.
Embodiment 7 is similar compared to composition still using the embodiment 1 of inorganic thickening agent using organic thickening agent
Product, the total phase change enthalpy conservation rate after total phase change enthalpy and circulation 1000 times of embodiment 6 have decline.
First cooling agent (ammonium chloride) additional amount is excessive in comparative example 1, leads to not obtain the phase with two-phase changing temperature degree
Change energy-storage material.
First cooling agent (ammonium chloride) additional amount is very few in comparative example 2, leads to not obtain the phase with two-phase changing temperature degree
Change energy-storage material.
Second cooling agent (potassium chloride) additional amount is excessive in comparative example 3, leads to not obtain the phase with two-phase changing temperature degree
Change energy-storage material.
Second cooling agent (potassium chloride) additional amount is very few in comparative example 4, leads to not obtain the phase with two-phase changing temperature degree
Change energy-storage material.
The first cooling agent (ammonium chloride) is not contained in comparative example 5, leads to not obtain the storage of the phase transformation with two-phase changing temperature degree
It can material.
The second cooling agent (potassium chloride) is not contained in comparative example 6, leads to not obtain the storage of the phase transformation with two-phase changing temperature degree
It can material.
As it can be seen that the first cooling agent and the second cooling agent be for realizing that it is key that two-phase changing temperature degree plays the role of, if phase
The content of the first cooling agent or the second cooling agent not within the scope of the invention, will be unable to realize two-phase changing temperature in change energy-storage material
Degree.
The Applicant declares that the present invention is explained by the above embodiments detailed process equipment and process flow of the invention,
But the present invention is not limited to the above detailed process equipment and process flow, that is, it is above-mentioned detailed not mean that the present invention must rely on
Process equipment and process flow could be implemented.It should be clear to those skilled in the art, any improvement in the present invention,
Addition, selection of concrete mode of equivalence replacement and auxiliary element to each raw material of product of the present invention etc., all fall within of the invention
Within protection scope and the open scope.
Claims (10)
1. a kind of phase-changing energy storage material with two-phase changing temperature degree, which is characterized in that the phase-changing energy storage material is by weight
Including following components:
55-70 parts of material of main part
70-100 parts of solvent
First 10-25 parts of cooling agent
Second 2-10 parts of cooling agent
5-10 parts of nucleating agent
2-150 parts of thickener.
2. the phase-changing energy storage material according to claim 1 with two-phase changing temperature degree, which is characterized in that the material of main part
Including sodium sulphate；
Preferably, first cooling agent is ammonium chloride and/or ammonium sulfate；
Preferably, second cooling agent is potassium chloride and/or potassium sulfate；
Preferably, the parts by weight of first cooling agent are greater than the parts by weight of the second cooling agent；
Preferably, the solvent includes water；
Preferably, the nucleating agent includes borax；
Preferably, the thickener is inorganic thickening agent and/or organic thickening agent；
Preferably, the inorganic thickening agent include in bentonite, palygorskite or sepiolite any one or at least two group
It closes；
Preferably, the bentonite includes calcium-base bentonite and/or sodium bentonite；
Preferably, the partial size of the inorganic thickening agent is 23-38 μm；
Preferably, the organic thickening agent includes Sodium Polyacrylate and/or methyl hydroxyethylcellulose；
Preferably, when the thickener is inorganic thickening agent, the parts by weight of the inorganic thickening agent are 80-150 parts；
Preferably, when the thickener is organic thickening agent, the parts by weight of the organic thickening agent are 2-9 parts.
3. the phase-changing energy storage material according to claim 1 or 2 with two-phase changing temperature degree, which is characterized in that the phase transformation
Energy storage material further includes thickening aids, and the parts by weight of the thickening aids are 5-10 parts；
Preferably, the thickening aids include calgon.
4. the phase-changing energy storage material according to claim 1-3 with two-phase changing temperature degree, which is characterized in that described
Phase-changing energy storage material includes following components by weight:
60-65 parts of material of main part
80-90 parts of solvent
First 15-20 parts of cooling agent
Second 5-8 parts of cooling agent
6-8 parts of nucleating agent
100-130 parts of inorganic thickening agent
7-9 parts of thickening aids.
5. the phase-changing energy storage material according to claim 1-4 with two-phase changing temperature degree, which is characterized in that described
The two-phase changing temperature degree of phase-changing energy storage material is respectively the first phase transition temperature and the second phase transition temperature, and first phase transition temperature is higher than
Second phase transition temperature, first phase transition temperature are 12-14 DEG C；
Preferably, the second phase transition temperature of the phase-changing energy storage material is 5-6 DEG C.
6. a kind of preparation method of the phase-changing energy storage material as described in claim any one of 1-5 with two-phase changing temperature degree, special
Sign is, the described method comprises the following steps:
The material of main part raw material of formula ratio, solvent, the first cooling agent, the second cooling agent, nucleating agent and thickener are mixed, obtained
The phase-changing energy storage material with two-phase changing temperature degree.
7. preparation method according to claim 6, which is characterized in that the mixed sequence be by material of main part raw material with it is molten
After agent mixing, the first cooling agent, the second cooling agent, nucleating agent and thickener are sequentially added；
Preferably, the material of main part raw material is free of the crystallization water；
Preferably, the material of main part raw material includes anhydrous sodium sulfate.
8. preparation method described according to claim 6 or 7, which is characterized in that the preparation method further include: thickening is added and helps
Agent；
Preferably, the mixed sequence is after mixing material of main part raw material with solvent, to sequentially add the first cooling agent, second
Cooling agent, nucleating agent, thickening aids and thickener.
9. according to any one of the claim 6-8 preparation method, which is characterized in that the mixing is with stirring；
Preferably, the rate of the stirring is 400-600r/min；
Preferably, the mixed temperature is 30-40 DEG C；
Preferably, the mixed time is 1-2h.
10. according to any one of the claim 6-9 preparation method, which is characterized in that the described method comprises the following steps:
After the material of main part raw material of formula ratio is mixed with solvent, sequentially add the first cooling agent of formula ratio, the second cooling agent,
Nucleating agent, thickening aids and thickener, with 30-40 DEG C of temperature mixing 1-2h, obtain institute under the stirring of 400-600r/min
State the phase-changing energy storage material with two-phase changing temperature degree.
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