Population balance modeling for the charging process of a PCM cold energy storage tank

Wu, Jing; Gagnière, Émilie; Jay, F.; Jallut, Christian

doi:10.1016/j.ijheatmasstransfer.2015.02.012

Cited by 8 publications

(1 citation statement)

References 32 publications

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“…Phase change materials (PCMs) offer an effective method for the efficient usage of latent thermal energy. Phase change materials are widely applied in the thermal energy storage field, such as solar energy, industrial waste heat and intermittent electric heating energy . The investigation and development of high performance PCMs are of great significance for energy storage, supply and demand.…”

Section: Introductionmentioning

confidence: 99%

Phase change performance assessment of salt mixtures for thermal energy storage material

Zhu

Zhou

et al. 2017

Int. J. Energy Res.

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Summary The phase transition performance of the CaCl2 · 6H2O–Ca(NO3)2 · 4H2O composite salt system with nucleating and thickening agents was investigated in this paper. The CaCl2 · 6H2O–Ca(NO3)2 · 4H2O composite salt system was prepared by adding Ca(NO3)2 · 4H2O (12 wt%) to CaCl2 · 6H2O. Different nucleating agents including SrCl2 · 6H2O, SrCO3, BaCl2, BaCO3, Na2B4O7 · 10H2O, 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 · 6H2O or the mixture of nucleating agents with 2 wt% SrCl2 · 6H2O, 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 · 6H2O–Ca(NO3)2 · 4H2O salt mixture has potential as a thermal energy storage material. Copyright © 2017 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%