An experimental study on melting heat transfer of paraffin dispersed with Al2O3 nanoparticles in a vertical enclosure

C. J. Ho, J. Y. Gao

研究成果: Article同行評審

111 引文 斯高帕斯(Scopus)

摘要

Melting experiments in a vertical square enclosure are undertaken with a solid-liquid phase-change material (n-octadecane) dispersed with nanoparticles (Al2O3) as the nano-phase-change-material (nano-PCM). The enclosure has a cross-section dimension of 25 by 25 mm and it was 60 mm long. The vertical side walls were differentially heated isothermally while the remaining side walls were thermally insulated. The effect of dispersing nanoparticles in the base phase change material (PCM) on the melting heat transfer characteristics in the enclosure is examined for the relevant parameters in the following ranges: the mass particle fraction of nanoparticles, ωp = 0, 5, 10 wt.%; the Rayleigh number, Raf = 1.71 × 106-5.67 × 107; the Stefan number, Ste f = 0.037-0.108; and the subcooling parameter, Sb = 0.042-0.537. The surface-averaged heat transfer results obtained during the melting experiments indicate that natural convection heat transfer into the melted region of the enclosure tends to degrade markedly with increasing mass fraction of nanoparticles dispersed in the nano-PCM, when compared with that of the base PCM.

原文English
頁(從 - 到)2-8
頁數7
期刊International Journal of Heat and Mass Transfer
62
發行號1
DOIs
出版狀態Published - 2013

All Science Journal Classification (ASJC) codes

  • 凝聚態物理學
  • 機械工業
  • 流體流動和轉移過程

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