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材料工程  2017, Vol. 45 Issue (1): 58-64    DOI: 10.11868/j.issn.1001-4381.2015.000073
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
Na2SO4·10H2O/EG复合相变材料的制备与性能分析
冷从斌1, 季旭1, 罗熙1, 李明1, 余琼粉1, 徐永锋1,2
1. 云南师范大学太阳能研究所, 昆明 650500;
2. 浙江省太阳能产品质量检验中心, 浙江 海宁 314400
Preparation and Performance Analysis of Na2SO4·10H2O/EG Composite Phase-change Materials
LENG Cong-bin1, JI Xu1, LUO Xi1, LI Ming1, YU Qiong-fen1, XU Yong-feng1,2
1. Solar Energy Research Institute, Yunnan Normal University, Kunming 650500, China;
2. Solar Product Quality Inspection Center in Zhejiang Province, Haining 314400, Zhejiang, China
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摘要 以十水硫酸钠为相变材料,采用真空吸附法制备十水合硫酸钠/膨胀石墨复合相变储能材料(Na2SO4·10H2O/EG),对其融化-凝固、相分离、过冷、潜热等热物性进行测试分析。结果表明:在Na2SO4·10H2O中添加2%(质量分数,下同)硼砂和8% EG后,可得到理想的Na2SO4·10H2O/EG固-固复合相变材料。此时,Na2SO4·10H2O相分离得到消除,过冷度由13.6℃降低到0.6℃以下,相变潜热和体储能密度分别为225.77kJ·kg-1和218.09MJ·m-3。此外,导热率也得到提高,相比于只添加成核剂硼砂的Na2SO4·10H2O PCM,储热时间缩短52.6%,放热时间缩短55.1%,经过500次急剧升温-降温循环后也未出现性能衰减,储/放热性能较好。
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冷从斌
季旭
罗熙
李明
余琼粉
徐永锋
关键词 Na2SO4·10H2O/EG复合相变储能材料相变潜热体储能密度    
Abstract:Sodium sulfate decahydrate/expanded graphite composite phase-change material (Na2SO4·10H2O/EG) was prepared by vacuum adsorption method.The thermal properties of Na2SO4·10H2O/EG,such as melting-solidification,phase separation,supercooling and latent heat were tested and analyzed.The results show that with the addition of 2%(mass fraction) borax and 8% EG,the composite phase-change materials Na2SO4·10H2O/EG obtain ideal properties.The phase separation is eliminated,the supercooling degree of Na2SO4·10H2O is reduced from 13.6℃ to below 0.6℃,the latent heat and the energy storage density of the phase-change materials reach 225.77kJ·kg-1 and 218.09MJ·m-3 respectively.The thermal conductivity is also greatly improved.Compared with Na2SO4·10H2O with the addition of the nucleating agent borax only,the time for heat storage is shortened by 52.6%,and the time for heat release is shortened by 55.1%.Even after 500 times of rapid heating and cooling cycles,the performance of Na2SO4·10H2O/EG does not deteriorate.The novel composite phase-change material has better storage/exothermic properties.
Key wordsNa2SO4·    10H2O/EG    composite phase-change material    latent heat    energy storage density
收稿日期: 2015-01-14      出版日期: 2017-01-19
中图分类号:  TB332  
通讯作者: 季旭(1976-),男,博士,副教授,研究方向:太阳能热利用,联系地址:云南省昆明市呈贡区聚贤街768号云南师范大学呈贡校区太阳能研究所(650500),E-mail:jixu@ynnu.edu.cn     E-mail: jixu@ynnu.edu.cn
引用本文:   
冷从斌, 季旭, 罗熙, 李明, 余琼粉, 徐永锋. Na2SO4·10H2O/EG复合相变材料的制备与性能分析[J]. 材料工程, 2017, 45(1): 58-64.
LENG Cong-bin, JI Xu, LUO Xi, LI Ming, YU Qiong-fen, XU Yong-feng. Preparation and Performance Analysis of Na2SO4·10H2O/EG Composite Phase-change Materials. Journal of Materials Engineering, 2017, 45(1): 58-64.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.000073      或      http://jme.biam.ac.cn/CN/Y2017/V45/I1/58
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