CN108003843A - A kind of high-temperature phase-change thermal energy storage material and preparation method thereof - Google Patents
A kind of high-temperature phase-change thermal energy storage material and preparation method thereof Download PDFInfo
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- CN108003843A CN108003843A CN201711319781.0A CN201711319781A CN108003843A CN 108003843 A CN108003843 A CN 108003843A CN 201711319781 A CN201711319781 A CN 201711319781A CN 108003843 A CN108003843 A CN 108003843A
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Abstract
The invention belongs to heat accumulating technical field, specifically discloses a kind of high-temperature phase-change thermal energy storage material and preparation method thereof.In terms of parts by weight, which is prepared by following raw material：3~8 parts of 60~80 parts of inorganic salts, 24~30 parts of expanded graphite, 8~15 parts of copper powder and graphene.Composite phase-change heat-storage material heat conductivility higher prepared by the present invention, heat absorption exotherm rate is faster；Maximum enthalpy is up to 228.7mAcm‑2, thermal conductivity 4.2mW/mg, has the advantages that latent heat of phase change is big, high-temperature stability is strong, small toxicity, corrosivity are small, is used as phase-change heat-storage material, improve energy conversion efficiency.
Description
Technical field
The invention belongs to heat accumulating technical field, and in particular to a kind of high-temperature phase-change thermal energy storage material and its preparation side
Method.
Background technology
It is energy saving with it is environmentally friendly be field of energy utilization an important topic, utilize phase-change heat-storage material latent heat of phase change storage
Energy is a kind of new power-saving technology.Phase-change material absorbs the heat of surrounding environment in phase transition process, and in surrounding environment
When temperature reduces, heat is discharged to surrounding environment, so as to achieve the purpose that to control ambient temperature and energy saving.It is in solar energy
All have wide practical use using fields such as, thermal energy recycling, air conditioner refrigerating, building energy conservation, aerospaces.
The shortcomings that current heat accumulating generally existing heat conductivility is poor, therefore manufactured phase-change thermal storage component is due to heat conduction
Property is poor, can not give full play to the heat storage function of heat accumulating.Secondly, when solid-liquid phase change occurs for heat accumulating, leakage can be caused to ask
Topic.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of high-temperature phase-change thermal energy storage material, the phase-change heat-storage material
Latent heat of phase change it is higher, heat conductivility is preferable, occur solid-liquid phase change when, shape invariance can be kept.
In terms of parts by weight, the high-temperature phase-change thermal energy storage material is prepared by following raw material：Complex inorganic salt catalyst 60
3~8 parts of~80 parts, 24~30 parts of expanded graphite and graphene.
Preferably, in terms of parts by weight, the high-temperature phase-change thermal energy storage material is prepared by following raw material：Compound nothing
5~8 parts of 60~70 parts of machine salt, 26~30 parts of expanded graphite and graphene.
More there is choosing, in terms of parts by weight, the high-temperature phase-change thermal energy storage material is prepared by following raw material：It is compound
5 parts of 66 parts of inorganic salts, 30 parts of expanded graphite and graphene.
Wherein, in above-mentioned high-temperature phase-change thermal energy storage material, the complex inorganic salt catalyst is by sodium carbonate, strontium carbonate and calcium carbonate
According to mass ratio 1:0.8~1:0.7~1.
Wherein, in above-mentioned high-temperature phase-change thermal energy storage material, lamella 5~15um of size of the graphene, specific surface area 7
~9m2/g。
Second technical problem to be solved by this invention is to provide the preparation side of above-mentioned high-temperature phase-change thermal energy storage material
Method, this method specifically include following steps：
(1) complex inorganic salt catalyst is prepared：Complex inorganic salt catalyst is according to sodium carbonate, strontium carbonate and calcium carbonate mass ratio 1:0.8~1:
0.7~1 dispensing, being warming up to molten condition insulation is uniformly mixed it, and then cooling is ground to particle diameter and reaches 300~400 mesh, obtains
To complex inorganic salt catalyst；
(2) by 3~8 parts of 60~80 parts of complex inorganic salt catalyst, 24~30 parts of expanded graphite and graphene mixing, water stirring is added to rise
Temperature stirs 1~1.5h, obtains mixture to 50~60 DEG C；
(3) by said mixture vacuum freeze-drying, high-temperature phase-change thermal energy storage material is obtained.
Wherein, the preparation method of above-mentioned high-temperature phase-change thermal energy storage material, is warming up to 700 DEG C described in step (1), described
Soaking time is 1.5h.
Wherein, the preparation method of above-mentioned high-temperature phase-change thermal energy storage material, the addition of water described in step (2) for 40~
50 parts.
Wherein, the preparation method of above-mentioned high-temperature phase-change thermal energy storage material, the condition of vacuum freeze-drying is in step (3)：Temperature
- 20~-15 DEG C of degree, time 24h.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) have the advantages that latent heat of phase change is big, high-temperature stability is strong, small toxicity, corrosivity are small, as phase-change heat-storage material
Use, improve energy conversion efficiency；
(2) composite phase-change heat-storage material heat conductivility higher prepared by the present invention, heat absorption exotherm rate is faster；Maximum enthalpy
Up to 228.7mAcm-2, thermal conductivity 4.2mW/mg.
(3) composite phase-change heat-storage material prepared by the present invention will not change its shape in phase transformation, can effectively anti-stopping leak
Dew.
Embodiment
The present invention provides a kind of high-temperature phase-change thermal energy storage material, the latent heat of phase change of the phase-change heat-storage material is higher, leads
Hot property is preferable, when solid-liquid phase change occurs, can keep shape invariance.
In terms of parts by weight, the high-temperature phase-change thermal energy storage material is prepared by following raw material：Complex inorganic salt catalyst 60
3~8 parts of~80 parts, 24~30 parts of expanded graphite and graphene；The complex inorganic salt catalyst is pressed by sodium carbonate, strontium carbonate and calcium carbonate
According to mass ratio 1:0.8~1:0.7~1；Lamella 5~the 15um of size, 7~9m of specific surface area of the graphene2/g。
Preferably, in terms of parts by weight, the high-temperature phase-change thermal energy storage material is prepared by following raw material：Compound nothing
5~8 parts of 60~70 parts of machine salt, 26~30 parts of expanded graphite and graphene.
More there is choosing, in terms of parts by weight, the high-temperature phase-change thermal energy storage material is prepared by following raw material：It is compound
5 parts of 66 parts of inorganic salts, 30 parts of expanded graphite and graphene.
Further, present invention also offers the preparation method of above-mentioned high-temperature phase-change thermal energy storage material, this method are specific
Comprise the following steps：
(1) complex inorganic salt catalyst is prepared：Complex inorganic salt catalyst is according to sodium carbonate, strontium carbonate and calcium carbonate mass ratio 1:0.8~1:
0.7~1 dispensing, it is in molten condition to be warming up to 700 DEG C, and insulation 1.5h is uniformly mixed it, and then cooling is ground to particle diameter and reaches
300~400 mesh, obtain complex inorganic salt catalyst；
(2) by 3~8 parts of 60~80 parts of complex inorganic salt catalyst, 24~30 parts of expanded graphite and graphene mixing, water 40~50 is added
Part stirring is warming up to 50~60 DEG C, stirs 1~1.5h, obtains mixture；
(3) by said mixture vacuum freeze-drying, high-temperature phase-change thermal energy storage material is obtained.
Wherein, the preparation method of above-mentioned high-temperature phase-change thermal energy storage material, the condition of vacuum freeze-drying is in step (3)：Temperature
- 20~-15 DEG C of degree, time 24h.
The present invention is made further explanation and description below in conjunction with specific embodiment, but is not intended to limit the present invention
Protection domain.
Lamella 5~the 15um of size, 7~9m of specific surface area of graphene used in embodiment 1~32/g。
Embodiment 1
The preparation method of high-temperature phase-change thermal energy storage material, this method specifically include following steps：
(1) complex inorganic salt catalyst is prepared：Complex inorganic salt catalyst is according to sodium carbonate, strontium carbonate and calcium carbonate mass ratio 1:0.8:0.7
Dispensing, it is in molten condition to be warming up to 700 DEG C, and insulation 1.5h is uniformly mixed it, and then cooling is ground to particle diameter and reaches 300 mesh,
Obtain complex inorganic salt catalyst；
(2) by 5 parts of 66 parts of complex inorganic salt catalyst, 30 parts of expanded graphite and graphene mixing, 40 parts of stirrings of water are added to be warming up to 60
DEG C, 1h is stirred, obtains mixture；
(3) by said mixture vacuum freeze-drying, -20 DEG C of temperature, time 24h, obtains high-temperature phase-change thermal energy storage material.
Calculate after testing, the enthalpy of thermal energy storage material prepared by embodiment 1 is 228.7mAcm-2, thermal conductivity is
4.2mW/mg。
Embodiment 2
The preparation method of high-temperature phase-change thermal energy storage material, this method specifically include following steps：
(1) complex inorganic salt catalyst is prepared：Complex inorganic salt catalyst is according to sodium carbonate, strontium carbonate and calcium carbonate mass ratio 1:1:1 dispensing,
It is in molten condition to be warming up to 700 DEG C, and insulation 1.5h is uniformly mixed it, and then cooling is ground to particle diameter and reaches 400 mesh, is answered
Close inorganic salts；
(2) by 8 parts of 70 parts of complex inorganic salt catalyst, 26 parts of expanded graphite and graphene mixing, 50 parts of stirrings of water are added to be warming up to 50
DEG C, 1.5h is stirred, obtains mixture；
(3) by said mixture vacuum freeze-drying, -18 DEG C of temperature, time 24h, obtains high-temperature phase-change thermal energy storage material.
Calculate after testing, the enthalpy of thermal energy storage material prepared by embodiment 2 is 220.7mAcm-2, thermal conductivity is
3.8mW/mg。
Embodiment 3
The preparation method of high-temperature phase-change thermal energy storage material, this method specifically include following steps：
(1) complex inorganic salt catalyst is prepared：Complex inorganic salt catalyst is according to sodium carbonate, strontium carbonate and calcium carbonate mass ratio 1:0.9:0.8
Dispensing, it is in molten condition to be warming up to 700 DEG C, and insulation 1.5h is uniformly mixed it, and then cooling is ground to particle diameter and reaches 400 mesh,
Obtain complex inorganic salt catalyst；
(2) by 3 parts of 60 parts of complex inorganic salt catalyst, 24 parts of expanded graphite and graphene mixing, 45 parts of stirrings of water are added to be warming up to 55
DEG C, 1.5h is stirred, obtains mixture；
(3) by said mixture vacuum freeze-drying, -15 DEG C of temperature, time 24h, obtains high-temperature phase-change thermal energy storage material.
Calculate after testing, the enthalpy of thermal energy storage material prepared by embodiment 3 is 224.2mAcm-2, thermal conductivity is
4.0mW/mg。
Claims (9)
1. a kind of high-temperature phase-change thermal energy storage material, it is characterised in that in terms of parts by weight, the heat accumulating is by following raw material system
It is standby to obtain：3~8 parts of 60~80 parts of inorganic salts, 24~30 parts of expanded graphite, 8~15 parts of copper powder and graphene.
A kind of 2. high-temperature phase-change thermal energy storage material according to claim 1, it is characterised in that in terms of parts by weight, institute
High-temperature phase-change thermal energy storage material is stated to be prepared by following raw material：60~70 parts of inorganic salts, 26~30 parts of expanded graphite, copper powder
10~15 parts and 5~8 parts of graphene.
A kind of 3. high-temperature phase-change thermal energy storage material according to claim 2, it is characterised in that in terms of parts by weight, institute
High-temperature phase-change thermal energy storage material is stated to be prepared by following raw material：66 parts of inorganic salts, 30 parts of expanded graphite, 12 parts of copper powder and stone
Black 5 parts of alkene.
4. according to a kind of high-temperature phase-change thermal energy storage material of claims 1 to 3 any one of them, it is characterised in that the nothing
Machine salt is by sodium carbonate, strontium carbonate and calcium carbonate according to mass ratio 1:0.8~1:0.7~1.
5. according to a kind of high-temperature phase-change thermal energy storage material of claims 1 to 3 any one of them, it is characterised in that the stone
Lamella 5~the 15um of size, 7~9m of specific surface area of black alkene2/g。
6. the preparation method of any one of Claims 1 to 5 high-temperature phase-change thermal energy storage material, it is characterised in that this method
Specifically include following steps：
(1) complex inorganic salt catalyst is prepared：Complex inorganic salt catalyst is according to sodium carbonate, strontium carbonate and calcium carbonate mass ratio 1:0.8~1:0.7~
1 dispensing, being warming up to molten condition insulation is uniformly mixed it, and then cooling is ground to particle diameter and reaches 300~400 mesh, is answered
Close inorganic salts；
(2) by 3~8 parts of 60~80 parts of complex inorganic salt catalyst, 24~30 parts of expanded graphite and graphene mixing, water stirring is added to be warming up to
50~60 DEG C, 1~1.5h is stirred, obtains mixture；
(3) by said mixture vacuum freeze-drying, high-temperature phase-change thermal energy storage material is obtained.
7. the preparation method of high-temperature phase-change thermal energy storage material according to claim 6, it is characterised in that institute in step (1)
State and be warming up to 700 DEG C, the soaking time is 1.5h.
8. the preparation method of high-temperature phase-change thermal energy storage material according to claim 6, it is characterised in that institute in step (2)
The addition for stating water is 40~50 parts.
9. the preparation method of high-temperature phase-change thermal energy storage material according to claim 6, it is characterised in that true in step (3)
The lyophilized condition of sky is：Temperature -20~-15 DEG C, time 24h.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114644906A (en) * | 2020-12-17 | 2022-06-21 | 国家电投集团科学技术研究院有限公司 | Composite phase-change heat storage material and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012130285A1 (en) * | 2011-03-29 | 2012-10-04 | Siemens Aktiengesellschaft | Thermal energy storage medium with carbonate salts and use of the thermal energy storage medium |
-
2017
- 2017-12-12 CN CN201711319781.0A patent/CN108003843A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012130285A1 (en) * | 2011-03-29 | 2012-10-04 | Siemens Aktiengesellschaft | Thermal energy storage medium with carbonate salts and use of the thermal energy storage medium |
Non-Patent Citations (1)
| Title |
|---|
| 王如竹等: "《绿色建筑能源系统》", 31 October 2013, 上海交通大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114644906A (en) * | 2020-12-17 | 2022-06-21 | 国家电投集团科学技术研究院有限公司 | Composite phase-change heat storage material and preparation method thereof |
| CN114644906B (en) * | 2020-12-17 | 2023-06-23 | 国家电投集团科学技术研究院有限公司 | Composite phase-change heat storage material and preparation method thereof |
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