新型复合相变储能材料Na/Paraffin的制备与性能分析

doi:10.11868/j.issn.1001-4381.2015.000687

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摘要

为提升广泛应用于相变储能领域的石蜡的导热系数，在手套箱内将导热系数高、熔点低、密度小的金属Na与石蜡复合为Na/paraffin新型相变储能材料，并对其导热系数、相变潜热及储/放热特性进行研究。结果表明：5% Na/95% paraffin复合相变储能材料导热系数较纯石蜡提高了17.6倍，储/放热速率均较纯石蜡提升了1倍；经过200次循环实验后，3% Na/97% paraffin复合相变储能材料相变温度由60.58℃下降到59.65℃，相变潜热由166.7520J·g^-1下降到160.5632J·g^-1，热导率由2.33W·m^-1·K^-1减少到1.98W·m^-1·K^-1。

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	徐永锋
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	王云峰
	冷从斌

关键词 ： Na/Paraffin, 复合相变储能材料, 相变潜热, 导热系数

Abstract：

In order to improve the thermal conductivity of paraffin widely applied in phase change energy storage field, metal Na with high thermal conductivity, low melting point and low density was compounded to paraffin to form a new phase change energy storage material (Na/paraffin) in glove box, and the thermal conductivity, latent heat and heat storage/release characteristics of Na/paraffin were studied. The results show that thermal conductivity of 5%Na/95% paraffin composite phase change energy storage materials is improved 17.6 times compared to pure paraffin and the heat storage/release ratio of 5%Na/95% paraffin is two times of pure paraffin. After 200 cycles experiment, the phase transition temperature of 3%Na/97% paraffin composite phase change energy storage materials falls from 60.58℃ to 59.65℃. The phase transformation latent heat and thermal conductivity rate are reduced from 166.7520J·g^-1 to 160.5632J·g^-1 and from 2.33W·m^-1·K^-1 to 1.98W·m^-1·K^-1, respectively.

Key words： Na/paraffin composite phase change energy storage material latent heat thermal conductivity

收稿日期: 2016-06-01 出版日期: 2017-11-18

中图分类号:

TB332

基金资助:国家自然科学基金(5166608);云南省应用基础研究计划项目(2012FD018);云南省教育厅科学研究基金研究生项目(2015J035)

通讯作者: 李明 E-mail: lmllldy@126.com

作者简介: 李明(1964-), 男, 博士生导师, 教授, 主要从事太阳能光热、光伏和制冷领域的研究, 联系地址:云南师范大学太阳能研究所(650500), E-mail:lmllldy@126.com

引用本文:

徐永锋, 李明, 罗熙, 余琼粉, 王云峰, 冷从斌. 新型复合相变储能材料Na/Paraffin的制备与性能分析[J]. 材料工程, 2017, 45(11): 66-71.
Yong-feng XU, Ming LI, Xi LUO, Qiong-fen YU, Yun-feng WANG, Cong-bin LENG. Preparation and Performance Analysis of Na/Paraffin New-style Composite Phase Change Energy Storage Material. Journal of Materials Engineering, 2017, 45(11): 66-71.

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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.000687 或 http://jme.biam.ac.cn/CN/Y2017/V45/I11/66

Fig.1 不同质量比Na/paraffin复合材料样品
(a)纯石蜡; (b), (c), (d)paraffin：Na质量比分别为99：1, 97：3和95：5

Fig.2 相变储能材料储/放热性能测试装置

Table 1 不同相变材料导热系数

Fig.3 纯石蜡与不同质量比Na/paraffin的DSC曲线 (a)纯石蜡; (b), (c), (d)paraffin：Na质量比分别为99：1, 97：3, 95：5

Fig.4 Paraffin中Na的分布情况 (a)paraffin：Na=99：1;(b)paraffin：Na=97：3

Fig.5 3种相变储能材料储/放热特性曲线

Table 2 3%Na/97%paraffin复合相变储能材料热物性参数变化

Fig.6 储/放热特性曲线对比
(a)10%EG/90%paraffin; (b)3%Na/97%paraffin

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