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| Experimental Investigation on Mechanism of Latent Heat Reduction of Sodium Acetate Trihydrate Phase Change Materials | |
| Wu, Liu1,2; Li, Jianqiang2; Wang, Hui2; Zhang, Ying2; Feng, Shaowei2; Guo, Yongchang2; Zhao, Jianling1; Wang, Xixin1; Guo, Lijiang2 | |
| 2020-02-01 | |
| Source Publication | MATERIALS
 |
| Volume | 13Issue:3Pages:11 |
| Abstract | Sodium acetate trihydrate (SAT) phase change material (PCM) has been well known for thermal energy storage due to its high latent heat and resource abundance. However, SAT suffers from severe latent heat reduction after heating and cooling cycles. Although a few of previous researches showed the reduction could be effectively inhibited by using thickeners, the mechanisms of the reduction process and thickeners' inhibition have not been deeply explored till now. In this work, SAT modified by 5 wt.% nucleating agent of disodium hydrogen phosphate dodecahydrate (SAT/5 wt.% DSP) was prepared and 200 thermal cycles were carried out. The differential scanning calorimeter, Rheometer, X-ray diffractometry, and scanning electron microscope were used to investigate the extent of latent heat reduction, viscosity, phase composition and microstructure, respectively, and the infrared thermal imaging method was used to evaluate heat storage capacity. It was found that the latent heat of SAT/5 wt.% DSP dropped dramatically and the relative decrease in latent heat was measured to be 22.44%. The lower layer of SAT/5 wt.% DSP contained 24.1 wt.% CH3COONa, which was quantitatively consistent with the reduction extent. Furthermore, the phase change endothermic time of the lower layer was only 44.1% of that of the upper. SAT/5 wt.% DSP was further modified by 3 wt.% thickener of carboxymethyl cellulose (SAT/5 wt.% DSP/3 wt.% CMC) and endured 200 thermal cycles. The extent of the latent heat reduction of SAT/5 wt.% DSP/3 wt.% CMC was only 9.29%, and phase compositions were more homogeneous. The 3 wt.% CMC increased viscosity by 14 times, which effectively prevented the Stokes sedimentation velocity of CH3COONa in melts and inhibited the final macroscopic phase separation. |
| Keyword | phase change materials sodium acetate trihydrate phase separation latent heat reduction |
| DOI | 10.3390/ma13030584 |
| Language | 英语 |
| WOS Keyword | THERMAL-ENERGY STORAGE ; CHANGE PERFORMANCE ; CONDUCTIVITY ; PCM ; NANOPARTICLES ; ENHANCEMENT |
| Funding Project | National Key Research and Development Program of China[2016YFC0700905] ; National Key Research and Development Program of China[2017YFC0703200] ; Transformational Technologies for Clean Energy and Demonstration Strategic Priority Research Program of the Chinese Academy of Sciences[XDA21070302] |
| WOS Research Area | Materials Science |
| WOS Subject | Materials Science, Multidisciplinary |
| Funding Organization | National Key Research and Development Program of China ; Transformational Technologies for Clean Energy and Demonstration Strategic Priority Research Program of the Chinese Academy of Sciences |
| WOS ID | WOS:000515503100091 |
| Publisher | MDPI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ipe.ac.cn/handle/122111/40054 |
| Collection | 中国科学院过程工程研究所 |
| Corresponding Author | Li, Jianqiang; Wang, Xixin; Guo, Lijiang |
| Affiliation | 1.Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China 2.Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China |
| Recommended Citation GB/T 7714 | Wu, Liu,Li, Jianqiang,Wang, Hui,et al. Experimental Investigation on Mechanism of Latent Heat Reduction of Sodium Acetate Trihydrate Phase Change Materials[J]. MATERIALS,2020,13(3):11. |
| APA | Wu, Liu.,Li, Jianqiang.,Wang, Hui.,Zhang, Ying.,Feng, Shaowei.,...&Guo, Lijiang.(2020).Experimental Investigation on Mechanism of Latent Heat Reduction of Sodium Acetate Trihydrate Phase Change Materials.MATERIALS,13(3),11. |
| MLA | Wu, Liu,et al."Experimental Investigation on Mechanism of Latent Heat Reduction of Sodium Acetate Trihydrate Phase Change Materials".MATERIALS 13.3(2020):11. |
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