Journal
SOLAR ENERGY
Volume 132, Issue -, Pages 405-414Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.solener.2016.03.036
Keywords
Latent heat storage; Phase change materials; Porous beads by suspension polymerization; Silica shell
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Funding
- Hungarian state
- European Union [TAMOP-4.2.2A-11/1/KONV-2012-0072, TAMOP-4.1.1C-12/1/KONV-2012-0017]
- Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences
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Phase change materials (PCMs) are used for latent heat storage. Most promising applications of PCMs are waste heat recovery systems, solar heating systems, building energy conservation systems, and air-conditioning systems. Macroporous poly(ethylene dimethacrylate) (PEDMA) carrier beads were formed by the suspension polymerization technique, imbibed with paraffin or cetyl alcohol phase change materials and coated with a silica shell to prevent their aggregation and the leakage of PCM. PEDMA beads contained 75.6% paraffin and 53.1% cetyl alcohol resulting in high latent heat storage capacities. The melting and crystallizing enthalpies were 132.6 and 133.4 J/g, respectively for paraffin-loaded capsules, while 89.6 and 88.6 J/g, respectively for cetyl alcohol containing beads. The excellent latent heat storage of the capsules was retained after 1000 heating cooling cycles indicating that the capillary forces of the silica-coated porous polymer beads efficiently prevented the leakage of the PCMs. (C) 2016 Elsevier Ltd. All rights reserved.
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