CFD simulation of air to air enthalpy heat exchanger

variable membrane moisture resistance

Rafat Al-Waked*, Mohammad Shakir Nasif, Graham Morrison, Masud Behnia

*Corresponding author for this work

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Conjugate heat and mass transfer processes across membrane heat exchangers of variable mass transportation resistance were investigated numerically. One half of flow channel for the hot stream and another for the adjacent cold stream were simulated. Effects of channel height, Reynolds number and flow direction on heat exchanger thermal effectiveness and energy recovered were studied. The validated CFD model showed that values of moisture resistance decrease with the increase in flow rates and/or the decrease in vapour mass fractions on both sides of the membrane. Furthermore, total hydraulic diameter effects on the thermal efficiency within membrane heat exchangers were found strong.

Original languageEnglish
Pages (from-to)301-309
Number of pages9
JournalApplied Thermal Engineering
Volume84
DOIs
Publication statusPublished - 5 Jun 2015
Externally publishedYes

Keywords

  • CFD
  • Conjugate heat transfer
  • Conjugate mass transfer
  • Energy recovery
  • Membrane
  • Variable resistance heat exchanger

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