CN102079971A - Phase-change material for storing day/night temperature difference energy and preparation method thereof - Google Patents
Phase-change material for storing day/night temperature difference energy and preparation method thereof Download PDFInfo
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- CN102079971A CN102079971A CN2010101203062A CN201010120306A CN102079971A CN 102079971 A CN102079971 A CN 102079971A CN 2010101203062 A CN2010101203062 A CN 2010101203062A CN 201010120306 A CN201010120306 A CN 201010120306A CN 102079971 A CN102079971 A CN 102079971A
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Abstract
The invention discloses a phase-change material applicable to storing day/night temperature difference energy and a preparation method thereof. The phase-change material is prepared by mixing CaCl2.6H2O as a storage medium with added SrCl2.6H2O and carboxymethylcellulose sodium. The preparation method comprises the steps of: respectively weighing three materials in proportion and mixing at an average valence; and heating and stirring in a constant-temperature water bath at the temperature of 40 DEG C till a mixture is completely dissolved to form a transparent liquid. In the invention, the CaCl2.6H2O has the advantages of low melting point, large heat storage capacity, safety, no toxicity and low cost and is easy to obtain. The SrCl2.6H2O is favorable for obviously reducing the subcooled temperature of the CaCl2.6H2O, and the carboxymethylcellulose sodium enables the heat storage performance of the CaCl2.6H2O to keep stable after the CaCl2.6H2O is repeatedly circulated, and can be utilized for a plurality of times. In addition, the preparation method is simple, and raw materials are low in cost and easy to obtain. The phase-change material has the phase-change temperature of 28 DEG C, and the phase-change latent heat of more than 100kJ/kg.
Description
Technical field:
The present invention relates to a kind of phase change material that is applicable to storage day and night temperature energy and preparation method thereof, particularly a kind of transformation temperature is phase change material about 28 ℃ and preparation method thereof.
Background technology:
Day and night temperature can be a kind of of natural cold-energy, and natural cold-energy (Nature Cool Energy) is meant in the normal temperature environment, naturally the low temperature difference low temperature heat energy of Cun Zaiing.In fact cold energy feels it is relative, temperature height no matter, and the existence of the temperature difference just means energy.Because the Nature is kept the ability infinity of envrionment temperature, is a kind of potential flood tide low-grade energy.China's major part is in the continental climate district, and the variation round the clock of temperature and seasonal variation are all very big, and compared with low plain oceanic climate district, what the natural cold-energy potentiality will be big is many.Utilize cost relatively low,, and utilize process also can not produce environmental pollution with wind energy, the same economically valuable of sun power.
The utilization key of this thermal gradient energy is energy storage, and the phase change material kind that is suitable for storing natural cold-energy at present is less, and latent heat of phase change is less, and stability is poor, and corrodibility is stronger, makes the utilization of natural cold-energy be restricted.CaCl
26H
2O is used for day and night temperature and can stores and use because of near its suitable fusing point (28 ℃) and higher heat storage capacity are suitable as a kind of phase change material.But the CaCl that produces
26H
2O can be serious cold excessively when cooling, and condensate depression reaches 12 ℃, causes can not guarantee to discharge stored latent heat at fusing point.
Summary of the invention:
One of technical problem to be solved by this invention is at not enough and big, with low cost, the nontoxic non-corrosiveness of developing a kind of latent heat of phase change of prior art, stability better and be suitable for storing day and night temperature can phase change material.
Two of technical problem to be solved by this invention provides the preparation method of above-mentioned phase change material.
As the storage day and night temperature of first aspect present invention can phase change material, mix by following raw materials by weight percent: CaCl
26H
2100 parts of O, SrCl
26H
2O 1-3 part, sodium cellulose glycolate 3-4 part.
The phase change material preparation method of above-mentioned storage day and night temperature energy comprises the steps:
(1) CaCl
26H
2The preparation of O
Earlier with the Calcium Chloride Powder Anhydrous grind into powder, produce supersaturated solution under 40 ℃ according to its solubleness, then in the cooling bath of putting into 10 ℃, till complete crystallization; Debris is outwelled, get CaCl after the cryodrying
26H
2O;
(2) take by weighing 1-3 part SrCl
26H
2O is with SrCl
26H
2O adds water and stirs until dissolving fully;
(3) take by weighing 100 parts of CaCl
26H
2The O crystal is with itself and dissolved SrCl
26H
2O and 3-4 sodium cellulose glycolate uniform mixing;
(4) heating and constantly stirring in 40～50 ℃ water bath with thermostatic control is dissolved into liquid fully until mixture, can obtain the phase change material of needed storage day and night temperature energy.
Described Calcium Chloride Powder Anhydrous is a chemical pure.
Phase change material provided by the invention, its transformation temperature are 28 ℃, and latent heat of phase change is more than the 100kJ/kg, nontoxic non-corrosiveness, and phase transition process is reversible, can repeatedly utilize; And its preparation method is simple, and raw material is cheap and easy to get.Discover, add SrCl
26H
2O can significantly improve CaCl
26H
2The surfusion of O.And sodium cellulose glycolate can well improve its stability, and it can be reused.
Embodiment
Embodiment 1
(1) prepares material, select for use chemical pure Calcium Chloride Powder Anhydrous to grind, by the supersaturated solution under 40 ℃ of its solubility curve preparations;
(2) the calcium chloride supersaturated solution is put into 10 ℃ constant temperature cooling bath, till complete crystallization, the debris of about 1g is outwelled, cryodrying gets CaCl
26H
2O is standby;
(3) take by weighing the SrCl of 3g
26H
2O is with SrCl
26H
2The less water of adding O stirs until dissolving fully;
(4) take by weighing 30g CaCl
26H
2The O crystal is with itself and dissolved SrCl
26H
2O and 1g sodium cellulose glycolate are put into the glass test tube uniform mixing of 25 millimeters of diameters;
(5) heating and constantly stirring in 40～50 ℃ water bath with thermostatic control is dissolved into liquid fully until mixture.
(6) place cooling bath to cool off the dissolved material, temperature is controlled at 10 ℃.
The transformation temperature of the phase change material of present embodiment and enthalpy of phase change are measured and are adopted differential scanning calorimeter (DSC) or temperature variation curve analytical method.
Use KingView software, press the timed interval record sample temperature of 60s.With the temperature and time is that coordinate axis is made cooling curve, observes the condensate depression and the energy storage situation of phase transformation.
The transformation temperature of the phase change material that makes is 25.7 ℃, and condensate depression is 2.5 ℃, and latent heat of phase change is 160kJ/kg.
Embodiment 2
(1) prepares material, select for use chemical pure Calcium Chloride Powder Anhydrous to grind, by the supersaturated solution under 40 ℃ of its solubility curve preparations;
(2) the calcium chloride supersaturated solution is put into 10 ℃ constant temperature cooling bath, till complete crystallization, the debris of about 1g is outwelled, cryodrying gets CaCl
26H
2O is standby;
(3) take by weighing the SrCl of 6g
26H
2O is with SrCl
26H
2The less water of adding O stirs until dissolving fully;
(4) take by weighing 30g CaCl
26H
2The O crystal is with itself and dissolved SrCl
26H
2O and 1g sodium cellulose glycolate are put into the glass test tube uniform mixing of 25 millimeters of diameters;
(5) heating and constantly stirring in 40～50 ℃ water bath with thermostatic control is dissolved into liquid fully until mixture.
(6) place cooling bath to cool off the dissolved material, temperature is controlled at 10 ℃.
The transformation temperature of the phase change material of present embodiment and enthalpy of phase change are measured and are adopted differential scanning calorimeter (DSC) or temperature variation curve analytical method.
Use KingView software, press the timed interval record sample temperature of 60s.With the temperature and time is that coordinate axis is made cooling curve, observes the condensate depression and the energy storage situation of phase transformation.
The transformation temperature of the phase change material that makes is 26.15 ℃, and condensate depression is 1.7 ℃, and latent heat of phase change is 166kJ/kg.
Embodiment 3
(1) prepares material, select for use chemical pure Calcium Chloride Powder Anhydrous to grind, by the supersaturated solution under 40 ℃ of its solubility curve preparations;
(2) the calcium chloride supersaturated solution is put into 10 ℃ constant temperature cooling bath, till complete crystallization, the debris of about 1g is outwelled, cryodrying gets CaCl
26H
2O is standby;
(3) take by weighing the SrCl of 9g
26H
2O is with SrCl
26H
2The less water of adding O stirs until dissolving fully;
(4) take by weighing 30g CaCl
26H
2The O crystal is with itself and dissolved SrCl
26H
2O and 1g sodium cellulose glycolate are put into the glass test tube uniform mixing of 25 millimeters of diameters;
(5) heating and constantly stirring in 40～50 ℃ water bath with thermostatic control is dissolved into liquid fully until mixture;
(6) place cooling bath to cool off the dissolved material, temperature is controlled at 10 ℃.
The transformation temperature of the phase change material of present embodiment and enthalpy of phase change are measured and are adopted differential scanning calorimeter (DSC) or temperature variation curve analytical method.
Use KingView software, press the timed interval record sample temperature of 60s.With the temperature and time is that coordinate axis is made cooling curve, observes the condensate depression and the energy storage situation of phase transformation.
The transformation temperature of the phase change material that makes is 24.92 ℃, and condensate depression is 4 ℃, and latent heat of phase change is 148kJ/kg.
Claims (3)
1. store the phase change material of day and night temperature energy, it is characterized in that, mix by following raw materials by weight percent: CaCl
26H
2100 parts of O, SrCl
26H
2O 1-3 part, sodium cellulose glycolate 3-4 part.
2. a method for preparing the phase change material of the described storage day and night temperature energy of claim 1 is characterized in that, comprises the steps:
(1) CaCl
26H
2The preparation of O
Earlier with the Calcium Chloride Powder Anhydrous grind into powder, produce supersaturated solution under 40 ℃ according to its solubleness, then in the cooling bath of putting into 10 ℃, till complete crystallization; Debris is outwelled, get CaCl after the cryodrying
26H
2O;
(2) take by weighing 1-3 part SrCl
26H
2O is with SrCl
26H
2O adds water and stirs until dissolving fully;
(3) take by weighing 100 parts of CaCl
26H
2The O crystal is with itself and dissolved SrCl
26H
2O and 3-4 part sodium cellulose glycolate uniform mixing;
(4) heating and constantly stirring in 40～50 ℃ water bath with thermostatic control is dissolved into liquid fully until mixture, can obtain the phase change material of needed storage day and night temperature energy.
3. method as claimed in claim 2 is characterized in that, described Calcium Chloride Powder Anhydrous is a chemical pure.
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|---|---|---|---|
| CN2010101203062A CN102079971A (en) | 2010-03-09 | 2010-03-09 | Phase-change material for storing day/night temperature difference energy and preparation method thereof |
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|---|---|---|---|
| CN2010101203062A CN102079971A (en) | 2010-03-09 | 2010-03-09 | Phase-change material for storing day/night temperature difference energy and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102827577A (en) * | 2011-06-17 | 2012-12-19 | 北京中瑞森新能源科技有限公司 | Inorganic phase-change material (PCM-34) with phase-change temperature of 34 DEG C |
| CN103374337A (en) * | 2012-04-27 | 2013-10-30 | 北京中瑞森新能源科技有限公司 | Inorganic phase-change material (PCM-29) with phase-change temperature of 29 DEG C |
| CN103484065A (en) * | 2012-06-14 | 2014-01-01 | 中瑞森(天津)新能源科技有限公司 | Inorganic phase change material with phase change temperature of 5 DEG C |
| CN104419381A (en) * | 2013-09-06 | 2015-03-18 | 广州市香港科大***研究院 | Phase change material and preparation method thereof |
| CN106118609A (en) * | 2016-06-27 | 2016-11-16 | 热魔方（北京）新能源科技股份有限公司 | Phase-change heat-storage material and its preparation method and application |
| CN107556972A (en) * | 2017-08-24 | 2018-01-09 | 中国科学院青海盐湖研究所 | Normal low temperature phase change energy-accumulating medium and preparation method thereof |
| WO2018202623A1 (en) * | 2017-05-04 | 2018-11-08 | Universität Hamburg | Composite material for storing water and/or heat |
| CN114230229A (en) * | 2021-12-30 | 2022-03-25 | 河北农业大学 | Calcium chloride hexahydrate composite phase change thermal insulation mortar |
-
2010
- 2010-03-09 CN CN2010101203062A patent/CN102079971A/en active Pending
Non-Patent Citations (2)
| Title |
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| 周彦同等: "《六水合氯化钙蓄热材料制备的研究》", 《江苏广播电视大学学报》 * |
| 徐云龙等: "《六水氯化钙相变材料过冷性质的研究》", 《材料工程》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102827577A (en) * | 2011-06-17 | 2012-12-19 | 北京中瑞森新能源科技有限公司 | Inorganic phase-change material (PCM-34) with phase-change temperature of 34 DEG C |
| CN102827577B (en) * | 2011-06-17 | 2015-03-18 | 北京中瑞森新能源科技有限公司 | Inorganic phase-change material (PCM-34) with phase-change temperature of 34 DEG C |
| CN103374337A (en) * | 2012-04-27 | 2013-10-30 | 北京中瑞森新能源科技有限公司 | Inorganic phase-change material (PCM-29) with phase-change temperature of 29 DEG C |
| CN103374337B (en) * | 2012-04-27 | 2015-09-09 | 北京中瑞森新能源科技有限公司 | A kind of transformation temperature is the inorganic phase-changing material (PCM-29) of 29 DEG C |
| CN103484065A (en) * | 2012-06-14 | 2014-01-01 | 中瑞森(天津)新能源科技有限公司 | Inorganic phase change material with phase change temperature of 5 DEG C |
| CN104419381A (en) * | 2013-09-06 | 2015-03-18 | 广州市香港科大***研究院 | Phase change material and preparation method thereof |
| CN106118609A (en) * | 2016-06-27 | 2016-11-16 | 热魔方（北京）新能源科技股份有限公司 | Phase-change heat-storage material and its preparation method and application |
| WO2018202623A1 (en) * | 2017-05-04 | 2018-11-08 | Universität Hamburg | Composite material for storing water and/or heat |
| CN107556972A (en) * | 2017-08-24 | 2018-01-09 | 中国科学院青海盐湖研究所 | Normal low temperature phase change energy-accumulating medium and preparation method thereof |
| CN107556972B (en) * | 2017-08-24 | 2021-03-02 | 中国科学院青海盐湖研究所 | Normal-low temperature phase change energy storage medium and preparation method thereof |
| CN114230229A (en) * | 2021-12-30 | 2022-03-25 | 河北农业大学 | Calcium chloride hexahydrate composite phase change thermal insulation mortar |
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Application publication date: 20110601 |