CN106221676B - The phase change heat storage material and its preparation process of multiphase height - Google Patents
The phase change heat storage material and its preparation process of multiphase height Download PDFInfo
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- CN106221676B CN106221676B CN201610612727.4A CN201610612727A CN106221676B CN 106221676 B CN106221676 B CN 106221676B CN 201610612727 A CN201610612727 A CN 201610612727A CN 106221676 B CN106221676 B CN 106221676B
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- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
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Abstract
The invention discloses a kind of phase change heat storage materials of multiphase height, combined processing is carried out by the different phase-change material of two or more phase transition temperature, then it is prepared by adding stabilizer, the combined processing is to sequentially add two or more phase-change material from low to high according to phase transition temperature to melt stirring in reaction kettle, stabilizer is added after being sufficiently stirred, furthermore its preparation process is also disclosed, including prepares the first phase-change material, the second phase-change material and stabilizer；Reaction kettle is added in first phase-change material, is heated to being stirred after it is completely melt；Second phase-change material is added in reaction kettle and is stirred；Stabilizer is stirred with being added in reaction kettle；Carry out DSC test, obtain a kind of phase-change material of non-single phase transformation temperature points, can be applied to specific field, such as heat accumulating type solar heat water system, summer and winter sunshine situation can be effectively matched, can effective use of energy sources, improve hot-water heating system heating efficiency.
Description
Technical field
The present invention relates to the phase change heat storage material and its preparation process of a kind of multiphase height, specially a kind of same material tool
There are two the phase change heat storage materials and its preparation process of phase transformation temperature points.
Background technique
There are many existing phase-change material type, have many research institution and enterprise to carry out a large amount of research and development work
Make, but commercially viable phase-change material and few, mainly limited by material Self-heat-storage density and stability.
Phase-change material has very big application space in field of solar energy, especially to solar water heater system.Present city
There are a non-water tank solar water heater, also referred to as phase-change heat-storage solar energy water heater on, is exactly to utilize efficient phase transformation
Heat accumulating (PCMs) substitutes water as heat storage medium, thus realize the cistern free of water heater, modularization, architecture-integral,
And it can effectively solve the problems, such as that solar energy night is unserviceable.Compared to cistern type water heater, have without heavy water tank, the thermal efficiency
Height, system is simple, fresh hot water, thermal starting block, can 24 hours supplying hot waters the advantages that.
Phase-change heat-storage solar energy water heater key problem in technology is phase change heat storage material, but can be applied to solar heat now
The phase-change material thermal storage density of hydrophone is relatively low, and phase-transition heat-storage temperature is single, can not combine summer and winter sunshine amount, not
Solar energy heating efficiency can be effectively improved, is the principal element for limiting the application of its phase-change material.
Therefore, how to solve the problems, such as phase-change material phase transition temperature it is single be those skilled in the art be dedicated to research side
To.
Summary of the invention
It is an object of the invention to overcome the shortcomings of above-mentioned technology, to provide a kind of phase-transition heat-storage of non-single transformation temperature
Material and its preparation process are solid-liquid phase change, and thermal storage density is big, can be effectively applied to solar water field.
It invents a kind of used technical solution and is such that the phase transformation material different by two or more phase transition temperature
Material carries out combined processing, is then prepared by adding stabilizer, and the combined processing is will be two or more
Phase-change material sequentially adds from low to high according to phase transition temperature melts stirring in reaction kettle, stabilizer is added after being sufficiently stirred.
Further improved to be: mass ratio shared by every kind of phase-change material is 10-90%, mass ratio shared by stabiliser content
Example is 1-20%.
It is further improved to be: to be formed by the different phase-change material combined processing of two kinds of phase transition temperatures, wherein the first phase transformation
Material is one of sugar alcohol substance, wherein the second phase-change material is one of alcohols or alkanes substance or mixture.
Further improved to be: the stabilizer is nano silica, nano-titanium dioxide, nano aluminium oxide, nanometer
Copper, nano aluminum, Nano-Zinc, nano nickel, talcum powder, one or more of montmorillonite.
Another technical solution used by inventing is such that the preparation process of the phase change heat storage material of multiphase height,
The following steps are included: the following steps are included:
S1: preparing the first phase-change material, the second phase-change material and stabilizer, and mass ratio shared by phase-change material is 10-
90%, mass ratio shared by stabiliser content is 1-20%；
S2: reaction kettle is added in the first phase-change material, is heated to being stirred after it is completely melt with 130-150 DEG C；
S3: the second phase-change material is slowly added into stirring in reaction kettle until it is melted completely；
S4: stabilizer is slowly added into reaction kettle and is stirred 45-75 minutes；
S5: mixture in reaction kettle is taken out and carries out DSC test.
Further improved to be: first phase-change material is one of antierythrite, xylitol, second phase transformation
Material is one of trimethylolethane, trimethylolpropane.
Further improved to be: the stabilizer is nano silica, nano-titanium dioxide, nano aluminium oxide, nanometer
Copper, nano aluminum, Nano-Zinc, nano nickel, talcum powder, montmorillonite, graphene, carbon nanotube, one or more of porous graphite.
Further improved to be: in step S2-S4, the stirring in reaction kettle is carried out under air-proof condition.
Further improved to be: mixing speed is 500-1000 revs/min.
By using preceding solution, the beneficial effects of the present invention are: obtaining a kind of phase of non-single phase transformation temperature points
Become material, can be applied to specific field, such as heat accumulating type solar heat water system, summer and winter sunshine shape can be effectively matched
Condition, can effective use of energy sources, improve hot-water heating system heating efficiency.
Detailed description of the invention
Fig. 1 is DSC test effect figure.
Specific embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Embodiment 1
A kind of phase change heat storage material of multiphase height, is prepared: antierythrite using following quality materials grade step
120g, trimethylolethane 80g, nano silica 10g.120g antierythrite is added to reaction kettle by feed opening first
In, 140 DEG C of heating are stirred after being completely melt, then 80g trimethylolethane are slowly added into reaction kettle, to sufficiently melt
Afterwards, it is slow added into 10g nano silica, is taken out after stirring 1 hour and carries out DSC test.
Its phase transition temperature is tested using differential calorimetric scan instrument (DSC), Fig. 1 such as is obtained and has the phase there are two phase transformation temperature points
Become material, the peak temperature of two phase transformation temperature points is respectively 83 DEG C and 97 DEG C, can be effectively applied to heat accumulating type solar heat water
System.
Embodiment 2
A kind of phase change heat storage material of multiphase height, is prepared: antierythrite using following quality materials grade step
140g, trimethylolpropane 60g, nano-titanium dioxide 10g.140g antierythrite is added to reaction kettle by feed opening first
In, 140 DEG C of heating are stirred after being completely melt, then 60g trimethylolethane are slowly added into reaction kettle, to sufficiently melt
Afterwards, it is slow added into 10g nano-titanium dioxide, is taken out after stirring 1 hour and carries out DSC test.
Embodiment 3
A kind of phase change heat storage material of multiphase height, is prepared using following quality materials grade step: xylitol 120g,
2-Amino-2-methyl-1,3-propanediol 80g, Nanometer Copper 10g.120g antierythrite is added to reaction by feed opening first
In kettle, 140 DEG C of heating are stirred after being completely melt, then 80g trimethylolethane is slowly added into reaction kettle, to sufficiently molten
After melting, it is slow added into 10g Nanometer Copper, is taken out after stirring 1 hour and carries out DSC test.
Embodiment 4
A kind of phase change heat storage material of multiphase height, is prepared: D-sorbite using following quality materials grade step
100g, trimethylolethane 70g, 1,4-butanediol 30g, porous graphite 10g.100g D-sorbite is added by feed opening first
Enter into reaction kettle, 140 DEG C of heating are stirred after being completely melt, then by 70g trimethylolethane and 30g 1,4-butanediol point
It is not slowly added into reaction kettle, after sufficiently melting, is slow added into 10g porous graphite, takes out and carry out after stirring 1 hour
DSC test.
Nano particle may be homogenously dispersed in liquid as stabilizer, reduce liquid fluidity, avoids layers of material or divides
Phase；Can be used as nucleating agent makes phase-change material homogeneous nucleation, reduces degree of supercooling；The thermal conductivity that material can be increased is scattered in material
Energy.
And be wherein slowly added to, it is that in reaction kettle is added agglomeration occurs for material in order to prevent, to being slowly added to
Speed control be those skilled in the art conventional means.
Basic principles and main features and its advantage of the invention have been shown and described above, the technical staff of the industry answers
The understanding, the present invention is not limited to the above embodiments, only illustrates original of the invention described in above-described embodiment and explanation
Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements
It all fall within the protetion scope of the claimed invention, the claimed scope of the invention is by appended claims and its equivalent circle
It is fixed.
Claims (7)
1. the phase change heat storage material of multiphase height, it is characterised in that: carried out by the different phase-change material of two kinds of phase transition temperatures compound
Processing is then prepared by adding stabilizer, and the combined processing is according to phase transition temperature by two kinds of phase-change materials by low
Supreme sequentially add melts stirring in reaction kettle, stabilizer is added after being sufficiently stirred；
The different phase-change material of two kinds of phase transition temperatures includes the first phase-change material and the second phase-change material, wherein the first phase-change material
For antierythrite, wherein the second phase-change material is trimethylolethane, the matter of first phase-change material and the second phase-change material
Amount ratio is 3:2.
2. the phase change heat storage material of multiphase height according to claim 1, it is characterised in that: mass ratio shared by phase-change material
Example is 10-90%, and mass ratio shared by stabiliser content is 1-20%.
3. according to claim 1 to the phase change heat storage material of multiphase height described in any one of 2 claims, feature exists
In: the stabilizer is nano silica, nano-titanium dioxide, nano aluminium oxide, Nanometer Copper, nano aluminum, Nano-Zinc, nanometer
Nickel, talcum powder, one or more of montmorillonite.
4. the preparation process of the phase change heat storage material of multiphase height, it is characterised in that: the following steps are included:
S1: preparing the first phase-change material, the second phase-change material and stabilizer, wherein the first phase-change material is antierythrite,
In the second phase-change material be trimethylolethane, the mass ratio of first phase-change material and the second phase-change material is 3:2, phase
Become mass ratio shared by material as 10-90%, mass ratio shared by stabiliser content is 1-20%；
S2: reaction kettle is added in the first phase-change material, is heated to being stirred after it is completely melt with 130-150 DEG C；
S3: the second phase-change material is slowly added into stirring in reaction kettle until it is melted completely；
S4: stabilizer is slowly added into reaction kettle and is stirred 45-75 minutes；
S5: mixture in reaction kettle is taken out and carries out DSC test.
5. the preparation process of the phase change heat storage material of multiphase height according to claim 4, it is characterised in that: the stabilization
Agent is nano silica, nano-titanium dioxide, nano aluminium oxide, Nanometer Copper, nano aluminum, Nano-Zinc, nano nickel, talcum powder,
Montmorillonite, graphene, carbon nanotube, one or more of porous graphite.
6. the preparation process of the phase change heat storage material of multiphase height according to claim 4, it is characterised in that: step S2-
In S4, the stirring in reaction kettle is carried out under air-proof condition.
7. the preparation process of the phase change heat storage material of multiphase height according to claim 4, it is characterised in that: mixing speed
It is 500-1000 revs/min.
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