Heat and mass transfer enhancement of binary nanofluids for H2O/LiBr falling film absorption process

Yong Tae Kang, Hyun June Kim, Kang Il Lee

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

The objectives of this study are to measure the vapor absorption rate and heat transfer rate for falling film flow of binary nanofluids, and to compare the enhancement of heat transfer and mass transfer under the same conditions of nanofluids. The key parameters are the base fluid concentration of LiBr, the concentration of nanoparticles in weight %, and nanoparticle constituents. The binary nanofluids are H2O/LiBr solution with nanoparticles of Fe and Carbon nanotubes (CNT) with the concentrations of 0.0, 0.01 and 0.1 wt %. The vapor absorption rate increases with increasing the solution mass flow rate and the concentration of Fe and CNT nanoparticles. It is found that the mass transfer enhancement is much more significant than the heat transfer enhancement in the binary nanofluids with Fe and CNT. It is also found that the mass transfer enhancement from the CNT nanoparticles becomes higher than that from the Fe nanoparticles. Therefore, the CNT is a better candidate than Fe nanoparticles for absorption performance enhancement in H2O/LiBr absorption system.

Original languageEnglish
Pages (from-to)850-856
Number of pages7
JournalInternational Journal of Refrigeration
Volume31
Issue number5
DOIs
Publication statusPublished - 2008 Aug 1
Externally publishedYes

Fingerprint

nanoparticles
mass transfer
heat transfer
films (materials)
carbon nanotubes
Nanoparticles
Carbon Nanotubes
Mass transfer
Hot Temperature
Heat transfer
Carbon nanotubes
vapors
Vapors
mass flow
nanofluids
Flow rate
Weights and Measures
Fluids

Keywords

  • Absorption
  • Absorption system
  • Additive
  • Enhancement
  • Falling film
  • Heat transfer
  • Mass transfer
  • Particle
  • Water-lithium bromide

ASJC Scopus subject areas

  • Food Science
  • Mechanical Engineering

Cite this

Heat and mass transfer enhancement of binary nanofluids for H2O/LiBr falling film absorption process. / Kang, Yong Tae; Kim, Hyun June; Lee, Kang Il.

In: International Journal of Refrigeration, Vol. 31, No. 5, 01.08.2008, p. 850-856.

Research output: Contribution to journalArticle

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AB - The objectives of this study are to measure the vapor absorption rate and heat transfer rate for falling film flow of binary nanofluids, and to compare the enhancement of heat transfer and mass transfer under the same conditions of nanofluids. The key parameters are the base fluid concentration of LiBr, the concentration of nanoparticles in weight %, and nanoparticle constituents. The binary nanofluids are H2O/LiBr solution with nanoparticles of Fe and Carbon nanotubes (CNT) with the concentrations of 0.0, 0.01 and 0.1 wt %. The vapor absorption rate increases with increasing the solution mass flow rate and the concentration of Fe and CNT nanoparticles. It is found that the mass transfer enhancement is much more significant than the heat transfer enhancement in the binary nanofluids with Fe and CNT. It is also found that the mass transfer enhancement from the CNT nanoparticles becomes higher than that from the Fe nanoparticles. Therefore, the CNT is a better candidate than Fe nanoparticles for absorption performance enhancement in H2O/LiBr absorption system.

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