Phase change materials in the ternary system NH4Cl + CaCl2 + H2O
文献类型：期刊论文
| 作者 | Dong, Ouyang
|
| 刊名 | CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY
 |
| 出版日期 | 2011 |
| 卷号 | 35期号:3页码:269-275 |
| 关键词 | Phase change materials Pitzer-Simonson-Clegg thermodynamic model |
| 英文摘要 | Solubility isotherms of the ternary system (NH4Cl + CaCl2 + H2O) were elaborately determined at T = (273.15 and 298.15) K by using the isothermal method. In the equilibrium phase diagram, there are two solubility branches corresponding to the solid phases CaCl2 center dot 6H(2)O and NH4Cl. Invariant point compositions are 36.32 wt% CaCl2 and 3.4 wt% NH4Cl at 273.15 K, and 45.86 wt% CaCl2 and 5.22 wt% NH4Cl at 298.15 K. A Pitzer-Simonson-Clegg thermodynamic model was applied to represent the thermodynamic properties of this ternary system and to construct a partial phase diagram of the ternary system at temperatures between (273.15 and 323.15) K. It was found in the predicted solubility phase diagram that the double salt 2NH(4)Cl center dot CaCl2 center dot 3H(2)O, found by other authors at (323.1 and 348.1) K. will disappear at temperatures below 298.15 K. Besides, it was found that there are two peritectic points in the ternary system with peritectic temperatures at 299.65 K and 298.15 K, and the former peritectic point falls just on the line between the composition points of NH4Cl and CaCl2 center dot 6H(2)O. According to phase rule, a solution made of this point will begin to crystallize at 299.65 K and end at 298 K and therefore can be acted as a "pseudo eutectic" phase change material (PCM). A heat storing and releasing experiment of 50 grams of the PCM was carried out, obtaining a satisfying result. (C) 2011 Elsevier Ltd. All rights reserved. Solubility isotherms of the ternary system (NH4Cl + CaCl2 + H2O) were elaborately determined at T = (273.15 and 298.15) K by using the isothermal method. In the equilibrium phase diagram, there are two solubility branches corresponding to the solid phases CaCl2 center dot 6H(2)O and NH4Cl. Invariant point compositions are 36.32 wt% CaCl2 and 3.4 wt% NH4Cl at 273.15 K, and 45.86 wt% CaCl2 and 5.22 wt% NH4Cl at 298.15 K. A Pitzer-Simonson-Clegg thermodynamic model was applied to represent the thermodynamic properties of this ternary system and to construct a partial phase diagram of the ternary system at temperatures between (273.15 and 323.15) K. It was found in the predicted solubility phase diagram that the double salt 2NH(4)Cl center dot CaCl2 center dot 3H(2)O, found by other authors at (323.1 and 348.1) K. will disappear at temperatures below 298.15 K. Besides, it was found that there are two peritectic points in the ternary system with peritectic temperatures at 299.65 K and 298.15 K, and the former peritectic point falls just on the line between the composition points of NH4Cl and CaCl2 center dot 6H(2)O. According to phase rule, a solution made of this point will begin to crystallize at 299.65 K and end at 298 K and therefore can be acted as a "pseudo eutectic" phase change material (PCM). A heat storing and releasing experiment of 50 grams of the PCM was carried out, obtaining a satisfying result. (C) 2011 Elsevier Ltd. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-08-22 |
| 源URL | [http://ir.isl.ac.cn/handle/363002/1868]  |
| 专题 | 青海盐湖研究所_青海盐湖研究所知识仓储 青海盐湖研究所_盐湖资源与化学实验室 |
| 推荐引用方式 GB/T 7714 | Dong, Ouyang. Phase change materials in the ternary system NH4Cl + CaCl2 + H2O[J]. CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY,2011,35(3):269-275. |
| APA | Dong, Ouyang.(2011).Phase change materials in the ternary system NH4Cl + CaCl2 + H2O.CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY,35(3),269-275. |
| MLA | Dong, Ouyang."Phase change materials in the ternary system NH4Cl + CaCl2 + H2O".CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY 35.3(2011):269-275. |
入库方式： OAI收割
来源：青海盐湖研究所
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