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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 PublicationMATERIALS
Volume13Issue:3Pages:11
AbstractSodium 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.
Keywordphase change materials sodium acetate trihydrate phase separation latent heat reduction
DOI10.3390/ma13030584
Language英语
WOS KeywordTHERMAL-ENERGY STORAGE ; CHANGE PERFORMANCE ; CONDUCTIVITY ; PCM ; NANOPARTICLES ; ENHANCEMENT
Funding ProjectNational 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 AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
Funding OrganizationNational 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 IDWOS:000515503100091
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/40054
Collection中国科学院过程工程研究所
Corresponding AuthorLi, Jianqiang; Wang, Xixin; Guo, Lijiang
Affiliation1.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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