Preparation and thermal energy storage studies of CH3COONa•3H2O-KCl composites salt system with enhanced phase change performance

The phase change performance of the CH3COONa center dot 3H(2)O-KCl composites salt system with Al2O3 nanoparticles and carboxyl methyl cellulose (CMC) were investigated in this paper. The CH3COONa center dot 3H(2)O-KCl composite salt system was prepared by adding KCI (at 2, 4, 6, 8, and 10 wt.%) to CH3COONa center dot 3H(2)O, respectively. Al2O3 nanoparticles were proposed as the nucleating agent and CMC was selected as a thickening agent for the CH3COONa center dot 3H(2)O-8 wt.%KCl composites salt system. The results show CH3COONa.3H(2)O-8 wt.%KCl composites salt system with 1 wt.% Al2O3 nanoparticles and 4 wt.% CMC, in which almost no supercoiling phenomenon occurs. After 50 cycles of the melting-freezing cycle test, aluminum oxide is uniformly dispersed in SAT composites matrix, the latent heat remained constant at about 232.29 J/g. The maximum deviations of latent heat of composites CH3COONa center dot 3H(2)O-8 wt.%KCl with 1 wt.% Al2O3 nanoparticles and 4 wt.% CMC before and after the fifty-run-recycling test are only 3.6%. (C) 2016 Elsevier Ltd. All rights reserved.