首页 | 本学科首页   官方微博 | 高级检索  
     检索      

石蜡/膨胀石墨复合相变材料的结构与热性能
引用本文:张正国,王学泽,方晓明.石蜡/膨胀石墨复合相变材料的结构与热性能[J].华南理工大学学报(自然科学版),2006,34(3):1-5.
作者姓名:张正国  王学泽  方晓明
作者单位:华南理工大学,传热强化与过程节能教育部重点实验室,广东,广州,510640
基金项目:科技部科研项目;广东省科技厅科技计划
摘    要:以有机物石蜡为相变材料、膨胀石墨为支撑结构,利用膨胀石墨的多孔吸附特性,制备出了石蜡含量分别为50%(质量分数,下同),60%,70%和80%的石蜡/膨胀石墨复合相变储热材料.采用扫描电镜(SEM)和差示扫描量热分析(DSC)对复合相变储热材料的结构和热性能进行了表征.结果表明:膨胀石墨吸附石蜡后仍然保持了原来疏松多孔的蠕虫状形态,石蜡被膨胀石墨微孔所吸附;复合相变储热材料的相变温度与石蜡相似,其相变潜热与基于复合材料中石蜡含量的潜热计算值相当.储(放)热性能测试结果表明,含80%石蜡的复合相变储热材料其储热时间比石蜡减少69.7%,放热时间减少80.2%.

关 键 词:相变材料  石蜡  膨胀石墨  结构  热性能
文章编号:1000-565X(2006)03-0001-05
收稿时间:2005-03-02
修稿时间:2005年3月2日

Structure and Thermal Properties of Composite Paraffin/Expanded Graphite Phase-Change Material
Zhang Zheng-guo,Wang Xue-ze,Fang Xiao-ming.Structure and Thermal Properties of Composite Paraffin/Expanded Graphite Phase-Change Material[J].Journal of South China University of Technology(Natural Science Edition),2006,34(3):1-5.
Authors:Zhang Zheng-guo  Wang Xue-ze  Fang Xiao-ming
Institution:Key Laboratory of Enhanced Heat Transfer and Energy Conservation, the Ministry of Education, South China Univ. of Tech. , Guangzhou 510640, Guangdong, China
Abstract:Composite paraffin/expanded graphite phase-change materials(PCMs) respectively containing 50%(mass fraction,below the same),60%,70% and 80% of paraffin were prepared by using paraffin as a latent heat-storage material and expanded graphite as a supporting matrix.The structure and thermal properties of PCMs were then characterized by means of SEM and DSC.It is shown that paraffin can be uniformly absorbed into the pore network of expanded graphite,that expanded graphite remains its vermiform structure in PCMs,that the phase-change temperatures of composite PCMs are similar to that of paraffin,and that the latent heat of composite PCMs is equivalent to the calculated values based on the mass fraction of paraffin in the composite materials.Moreover,(tes-)ted results of heat storage and release indicate that the time of thermal-energy storage and release of the composite PCM containing 80% of paraffin decreases respectively by 69.7% and 80.2%,as compared with that of paraffin.
Keywords:phase-change material  paraffin  expanded graphite  structure  thermal property
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号