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Phase change performance assessment of salt mixtures for thermal energy storage material
Zhu, F. Y.1; Zhou, H. X.2; Zhou, Y. Q.1; Ge, H. W.1; Fang, W. C.1; Fang, Y.1; Fang, C. H.1
2017-10-25
Source PublicationINTERNATIONAL JOURNAL OF ENERGY RESEARCH
Volume41Issue:13Pages:1855-1866
SubtypeArticle
AbstractThe phase transition performance of the CaCl (2)center dot 6H(2)O-Ca(NO3)(2)center dot 4H(2)O composite salt system with nucleating and thickening agents was investigated in this paper. The CaCl2 center dot 6H(2)O-Ca(NO3)(2)center dot 4H(2)O composite salt system was prepared by adding Ca(NO3) 2 center dot 4H2O (12 wt%) to CaCl2 center dot 6H(2)O. Different nucleating agents including SrCl2 center dot 6H(2)O, SrCO3, BaCl2, BaCO3, Na2B4O7 center dot 10H(2)O, H3BO3 and NH4Cl were used to address the problems of phase segregation and supercooling phenomena during the phase change process. The results show that the single nucleating agent SrCl2 center dot 6H(2)O or the mixture of nucleating agents with 2 wt% SrCl2 center dot 6H(2)O, 1 wt% BaCl2 and 0.5 wt% of thickening agent carboxyl methyl cellulose is the most suitable for this system. The latent heat remained constant at about 116 J/g before and after adding the agents. Density functional theory was used to further investigate the microstructure-related reason for the salt-water separation and supercooling phenomena. It can be deduced that the hydrogen bond is the vital factor involved during the phase transition. The aim of adding thickener was to form more hydrogen bonds which encapsulated the hydrated species and made it difficult to lose the hydrated waters. The main purpose of adding nucleating agent was to break the metastable state among microscopic species. The results of this work indicate that the CaCl2 center dot 6H(2)O-Ca(NO3)(2)center dot 4H(2)O salt mixture has potential as a thermal energy storage material. Copyright (C) 2017 John Wiley & Sons, Ltd.
KeywordPhase Change Material (Pcm) Nucleating Agent Supercooling Phenomena Density Functional Theory Molten Structure
WOS HeadingsScience & Technology ; Technology
WOS KeywordLATENT-HEAT STORAGE ; MAGNESIUM-CHLORIDE HEXAHYDRATE ; CALCIUM-CHLORIDE ; AQUEOUS-SOLUTIONS ; PCM ; DENSITY ; TEMPERATURE ; SYSTEM ; TANK
Indexed BySCI
Language英语
WOS Research AreaEnergy & Fuels ; Nuclear Science & Technology
WOS SubjectEnergy & Fuels ; Nuclear Science & Technology
WOS IDWOS:000417408200006
Citation statistics
Document Type期刊论文
Identifierhttp://ir.isl.ac.cn/handle/363002/6407
Collection青海盐湖研究所知识仓储
盐湖资源与化学实验室
Affiliation1.Chinese Acad Sci, Lab Salt Resources & Chem, Inst Salt Lakes, Xining 810008, Qinghai, Peoples R China
2.Qinghai Univ, Mech Engn Coll, Xining 810001, Qinghai, Peoples R China
Recommended Citation
GB/T 7714
Zhu, F. Y.,Zhou, H. X.,Zhou, Y. Q.,et al. Phase change performance assessment of salt mixtures for thermal energy storage material[J]. INTERNATIONAL JOURNAL OF ENERGY RESEARCH,2017,41(13):1855-1866.
APA Zhu, F. Y..,Zhou, H. X..,Zhou, Y. Q..,Ge, H. W..,Fang, W. C..,...&Fang, C. H..(2017).Phase change performance assessment of salt mixtures for thermal energy storage material.INTERNATIONAL JOURNAL OF ENERGY RESEARCH,41(13),1855-1866.
MLA Zhu, F. Y.,et al."Phase change performance assessment of salt mixtures for thermal energy storage material".INTERNATIONAL JOURNAL OF ENERGY RESEARCH 41.13(2017):1855-1866.
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