Heat transfer enhancement of paraffin wax using compressed expanded natural graphite for thermal energy storage
Heat transfer enhancement of paraffin wax using compressed expanded natural graphite for thermal energy storage
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DOI：
10.1016/j.carbon.2009.09.033
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发表时间：
2010
期刊：
影响因子：
10.9
通讯作者：
Yajuan Zhong;Sizhong Li;Xing Wei;Zhanjun Liu;Q. Guo;Jingli Shi;Lang Liu
中科院分区：
文献类型：
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作者：
Yajuan Zhong;Sizhong Li;Xing Wei;Zhanjun Liu;Q. Guo;Jingli Shi;Lang Liu
采用不同密度的压缩膨胀天然石墨（CENG）基体来提高石蜡的热性能。为了预测石蜡/CENG复合材料作为热能储存系统的性能，对其结构、热导率和潜热进行了表征。结果表明，该复合材料的导热系数可达纯石蜡的28-180倍。由于CENG基质中孔结构和导热系数的各向异性，自然对流的存在可以减少熔化所需的时间。导热系数与CENG基体的体积密度、复合材料的潜热与石蜡在CENG基体中的质量比几乎呈线性关系。
Compressed expanded natural graphite (CENG) matrices with different densities were used to increase the thermal property of paraffin wax. To predict the performance of the paraffin wax/CENG composites as a thermal energy storage system, their structure, thermal conductivity and latent heat were characterized. Results indicated that the thermal conductivity of the composites can be 28–180× that of the pure paraffin wax. The existence of natural convection can reduce the time necessary for melting due to the anisotropy of the pore structure and thermal conductivity in CENG matrix. There are almost linear relationships between the thermal conductivity and the bulk density of the CENG matrix, and between the latent heat of the composite and the mass ratio of paraffin wax in the CENG matrix.