Effectiveness correlations for heat and moisture transfer processes in an enthalpy exchanger with membrane cores

L. Z. Zhang, Jianlei Niu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

125 Citations (Scopus)

Abstract

The performance correlations for the effectiveness of heat and moisture transfer processes in an enthalpy exchanger with membrane cores are presented. The physical phenomena relevant to the heat and moisture transfer in these devices have been used to develop a novel set of correlations based on the relevant dimensionless parameters. The total enthalpy effectiveness can be calculated from sensible effectiveness, latent effectiveness, and the ratio of latent to sensible energy differences across the unit. Studies show that the sensible effectiveness is a function of NTU, the number of transfer units for heat; while the latent effectiveness is a function of NTUL, the number of transfer units for moisture. The relations between NTULand NTU are derived and studied with the proper separation of moisture resistance for membranes. This newly developed dimensionless parameter. NTUL, is to summarize the sorption characteristics of membrane material, the exchanger configurations, as well as the operating conditions. A number of experimental results on an enthalpy exchanger with novel hydrophilic membrane cores has been used to valid these correlations.
Original languageEnglish
Pages (from-to)922-929
Number of pages8
JournalJournal of Heat Transfer
Volume124
Issue number5
DOIs
Publication statusPublished - 1 Oct 2002

Keywords

  • Deliumidification
  • Exchanger
  • Heat transfer
  • Membrane
  • Moisture

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Physical and Theoretical Chemistry
  • Mechanical Engineering

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