Experimental Investigation on Mechanism of Latent Heat Reduction of Sodium Acetate Trihydrate Phase Change Materials

doi:10.3390/ma13030584

	Experimental Investigation on Mechanism of Latent Heat Reduction of Sodium Acetate Trihydrate Phase Change Materials
	Wu, Liu 1,2; Li, Jianqiang 1; Wang, Hui 1; Zhang, Ying 1; Feng, Shaowei 1; Guo, Yongchang 1; Zhao, Jianling 2; Wang, Xixin 2; Guo, Lijiang 1
刊名	MATERIALS
	2020-02-01
卷号	13 期号:3 页码:11
关键词	phase change materials sodium acetate trihydrate phase separation latent heat reduction
DOI	10.3390/ma13030584
英文摘要	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.
资助项目	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关键词	THERMAL-ENERGY STORAGE ; CHANGE PERFORMANCE ; CONDUCTIVITY ; PCM ; NANOPARTICLES ; ENHANCEMENT
WOS研究方向	Materials Science
语种	英语
出版者	MDPI
WOS记录号	WOS:000515503100091
资助机构	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
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/40053]
专题	中国科学院过程工程研究所
通讯作者	Li, Jianqiang; Wang, Xixin; Guo, Lijiang
作者单位	1.Chinese Acad Sci, Natl Engn Lab Hydromet Cleaner Prod Technol, Key Lab Green Proc & Engn, Inst Proc Engn, Beijing 100190, Peoples R China 2.Hebei Univ Technol, Sch Mat Sci & Engn, Tianjin 300130, Peoples R China
推荐引用方式 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.