Effect of carbon-fiber brushes on conductive heat transfer in phase change materials

Jun Fukai, Yuichi Hamada, Yoshio Morozumi, Osamu Miyatake

Research output: Contribution to journalArticle

144 Citations (Scopus)

Abstract

Brushes made of carbon fibers are used to improve the thermal conductivities of phase change materials packed around heat transfer tubes. The transient thermal responses measured in brush/n-octadecane composites essentially improve as the volume fraction of the fibers and the brush diameter increase. However, there is a critical diameter above which further improvement is not expected due to thermal resistance between the fibers and the tube surface. A two-dimensional heat transfer model describing anisotropic heat flow in the composite is numerically solved. The calculated transient temperature agree well with the experimental. A simple model is also developed to predict the heat exchange rate between the composite and the heat transfer fluid. The values of the correction factors are identified on the basis of the results for the anisotropic model.

Original languageEnglish
Pages (from-to)4781-4792
Number of pages12
JournalInternational Journal of Heat and Mass Transfer
Volume45
Issue number24
DOIs
Publication statusPublished - Sep 16 2002

Fingerprint

phase change materials
Phase change materials
brushes
Brushes
carbon fibers
conductive heat transfer
Carbon fibers
heat transfer
Heat transfer
composite materials
Composite materials
tubes
fibers
Fibers
Tubes (components)
thermal resistance
Heat resistance
heat transmission
Volume fraction
Thermal conductivity

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes
  • Energy(all)
  • Mechanical Engineering

Cite this

Effect of carbon-fiber brushes on conductive heat transfer in phase change materials. / Fukai, Jun; Hamada, Yuichi; Morozumi, Yoshio; Miyatake, Osamu.

In: International Journal of Heat and Mass Transfer, Vol. 45, No. 24, 16.09.2002, p. 4781-4792.

Research output: Contribution to journalArticle

Fukai, Jun ; Hamada, Yuichi ; Morozumi, Yoshio ; Miyatake, Osamu. / Effect of carbon-fiber brushes on conductive heat transfer in phase change materials. In: International Journal of Heat and Mass Transfer. 2002 ; Vol. 45, No. 24. pp. 4781-4792.
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