在制备(KNO3-LiNO3-Ca(NO3)2)/膨胀石墨粉(Expanded graphite,EG)复合相变材料过程中,硝酸共晶盐与EG的混匀程度直接影响着复合相变材料的蓄放热性能.KNO3、LiNO3、Ca(NO3)2按一定比例熔融混合制备得到共晶盐,然后再加入不同质量的水使共晶盐溶解,最后再将设定质量比的EG加入并搅拌混匀,加热将水分蒸发完全后得到复合相变材料.利用电子扫描显微镜(SEM)观察EG的微观形貌,用综合热分析仪(DSC Q600)测定所制备的复合相变材料的相变潜热值并用导热仪测量其导热系数.实验结果表明,对于EG质量分数为5％的复合相变材料,当溶解水量大于200 g时,热物性较为理想.另外,EG含量越多,复合相变材料的导热系数越大.
参考文献
| [1] | Li M;Wu Z;Tan J .Heat storage properties of the cement mortar incorporated with composite phase change material[J].Applied Energy,2013,103:393. |
| [2] | 肖鑫,张鹏.泡沫石墨/石蜡复合相变材料热物性研究[J].工程热物理学报,2013(03):530-533. |
| [3] | Akira Hoshi;David R. Mills;Antoine Bittar;Takeo S. Saitoh .Screening of high melting point phase change materials (PCM) in solar thermal concentrating technology based on CLFR[J].Solar Energy,2005(3):332-339. |
| [4] | Murat M. Kenisarin .High-temperature phase change materials for thermal energy storage[J].Renewable & sustainable energy reviews,2010(3):955. |
| [5] | Oró E;Barreneche C;Farid M M et al.Experimental study on the selection of phase change materials for low temperature applications[J].RENEWABLE ENERGY,2013,57:130. |
| [6] | Oró E;de Gracia A;Castell A et al.Review on phase change materials (PCMs) for cold thermal energy storage applications[J].Applied Energy,2012,99:513. |
| [7] | 张寅平;胡汉平;孔祥东.相变贮能[M].合肥:中国科学技术大学出版社,1996 |
| [8] | S. Jegadheeswaran .Performance enhancement in latent heat thermal storage system: A review[J].Renewable & sustainable energy reviews,2009(9):2225-2244. |
| [9] | Zhao, C.Y.;Wu, Z.G. .Heat transfer enhancement of high temperature thermal energy storage using metal foams and expanded graphite[J].Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion,2011(2):636-643. |
| [10] | Couto Aktay K S;Tarnme R;Müller-Steinhagen H .Thermal conductivity of high-temperature multicomponent materials with phase change[J].International Journal of Thermophysics,2007,29(02):678. |
| [11] | Pincemin S;Py X;Olives R;Christ M;Oettinger O .Elaboration of conductive thermal storage composites made of phase change materials and graphite for solar plant[J].Journal of Solar Energy Engineering,2008(1):11005-1-11005-5-0. |
| [12] | 张焘,曾亮,张东.膨胀石墨、石墨烯改善无机盐相变材料热物性能[J].无机盐工业,2010(05):24-26. |
| [13] | 李月锋,张东.水溶液法制备NaNO3-LiNO3/石墨复合高温相变材料研究[J].功能材料,2013(10):1451-1456. |
| [14] | Pincemin S;Olives R;Py X;Christ M .Highly conductive composites made of phase change materials and graphite for thermal storage[J].Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion,2008(6):603-613. |
| [15] | D. Zhou;C. Y. Zhao .Experimental investigations on heat transfer in phase change materials (PCMs) embedded in porous materials[J].Applied thermal engineering: Design, processes, equipment, economics,2011(5):970-977. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%