吴丽彬,陈威,钱静.有机-无机混合相变材料的热物性研究[J].包装工程,2017,38(9):113-117.
WU Li-bin,CHEN Wei,QIAN Jing.Thermophysical Property of Organic-Inorganic Phase Change Mixed Material[J].Packaging Engineering,2017,38(9):113-117. |
| 有机-无机混合相变材料的热物性研究 |
| Thermophysical Property of Organic-Inorganic Phase Change Mixed Material |
| 投稿时间：2016-07-20 修订日期：2017-05-10 |
| DOI： |
| 中文关键词: 有机-无机相变材料 相变潜热 过冷度 循环稳定性 |
| 英文关键词: organic-inorganic phase change materials latent heat of phase change supercooling degree cycling stability |
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| 中文摘要: |
| 目的 获得有效改善过冷，同时保持较高潜热、性能稳定的混合相变储能材料。方法 分别制备不同质量比的硬脂酸/Mg(NO3)2·6H2O、硬脂酸/Na2HPO4·12H2O 的混合材料，使用高低温交变箱测试长期循环性能，用温度记录仪测其步冷曲线，得到相变温度和过冷度，再使用参比温度曲线法对相变材料循环前后的相变潜热进行测试比较。结果 硬脂酸/Na2HPO4·12H2O 混合材料的过冷度降低至3℃左右，经300 次融化/凝固循环后过冷度维持恒定，潜热衰减率在20%以内。结论 采用结构相似的2 种混合相变材料均可改善无机水合盐的过冷度。硬脂酸与Mg(NO3)2·6H2O 相容性不佳，相变潜热的衰减加剧，循环稳定性变差，而硬脂酸与Na2HPO4·12H2O 的相容性良好，性能表现稳定，是一种良好的储能材料。 |
| 英文摘要: |
| The work aims to obtain the phase change energy-storage mixed material that can effectively improve supercooling and maintain higher latent heat and stable performance. The mixed materials with different mass ratios of stearic acid/Mg(NO3)2·6H2O and stearic acid/Na2HPO4·12H2O mixtures were respectively prepared. The long-term cycling performance was tested with low temperature alternating box and its step cooling curve was tested with temperature logger to obtain the phase change temperature and supercooling degree. Then, the reference temperature curve method was adopted to test and compare the latent heat of phase change before and after the cycling of phase-change material. The supercooling degree of stearic acid/Na2HPO4·12H2O mixed material reduced to around 3 ℃. After melting/ solidification cycling for 300 times, the supercooling degree remained constant and the attenuation rate of latent heat was within 20%. Both phase-change mixed materials with similar structures can improve the supercooling degree of inorganic hydrous salt. Stearic acid and Mg(NO3)2·6H2O are of poor compatibility, the latent heat of phase change attenuates dramatically and the cycling stability becomes worse. However, stearic acid and Na2HPO4·12H2O are of good compatibility and with stable performance, which is a good material for energy storage. |
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