通过膨胀石墨粉与石蜡混合制备相变复合材料可有效提高该储能材料的传热性能.为研究膨胀石墨/石蜡相变复合材料的导热机制,提出了膨胀石墨粉与石蜡混合后的3尺度层次固体有效导热系数计算方法.然后,通过数值模拟计算得到了具有不同体积分数和不同导热系数的膨胀石墨导热颗粒的膨胀石墨/石蜡相变复合材料的有效导热系数.结果表明:膨胀石墨能够有效地提高石蜡的导热性能,当膨胀石墨的体积分数为10％时,膨胀石墨/石蜡相变复合材料的有效导热系数是纯石蜡的9倍.此外,提高底层尺度的石墨片与石蜡的混合程度及降低底层尺度石墨的体积分数都能有效提高膨胀石墨/石蜡相变复合材料的有效导热系数.所得结论为探究膨胀石墨粉提高相变复合材料导热系数的机理奠定了基础.
参考文献
| [1] | R. Velraj;R. V. Seeniraj;B. Hafner;C. Faber;K. Schwarzer.Heat transfer enhancement in a latent heat storage system[J].Solar Energy,19993(3):171-180. |
| [2] | Belen Zalba;Jose M Marin;Luisa F. Cabeza;Harald Mehling.Review on thermal energy storage with phase change: materials, heat transfer analysis and applications[J].Applied thermal engineering: Design, processes, equipment, economics,20033(3):251-283. |
| [3] | Liwu Fan;J.M.Khodadadi.Thermal conductivity enhancement of phase change materials for thermal energy storage: A review[J].Renewable & sustainable energy reviews,20111(1):24-46. |
| [4] | 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,20086(6):603-613. |
| [5] | 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,20112(2):636-643. |
| [6] | Kim, S;Drza, LT.High latent heat storage and high thermal conductive phase change materials using exfoliated graphite nanoplatelets[J].Solar Energy Materials and Solar Cells,20091(1):136-142. |
| [7] | Xavier Py;Regis Olives;Sylvain Mauran.Paraffin/porous-graphite-matrix composite as a high and constant power thermal storage material[J].International Journal of Heat and Mass Transfer,200114(14):2727-2737. |
| [8] | Ahmet Sari;Ali Karaipekli.Thermal conductivity and latent heat thermal energy storage characteristics of paraffin/expanded graphite composite as phase change material[J].Applied thermal engineering: Design, processes, equipment, economics,20078-9(8-9):1271-1277. |
| [9] | Sari, A;Karaipekli, A.Preparation, thermal properties and thermal reliability of palmitic acid/expanded graphite composite as form-stable PCM for thermal energy storage[J].Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion,20095(5):571-576. |
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%