Air-side heat transfer and friction correlations for flat-tube louver-fin heat exchangers

Young Gil Park, Anthony M. Jacobi

Research output: Contribution to journalArticlepeer-review


The objective of this study is to develop an accurate, reliable, and updated predictive model for the air-side performance of flat-tube louver-fin heat exchangers. Using the most comprehensive experimental database to date-consisting of 1030 heat-transfer and 1270 pressure-drop measurements, from nine independent laboratories for 126 sample heat exchangers-j- and f-factor correlations are developed to predict the air-side performance of heat exchangers. The database is analyzed, the form of the curve fits is explored, and the predictive performance of the correlations is evaluated. The j- and f-factor correlations predict the experimental data with rms errors of 11.5% and 16.1%, respectively. Multiple regressions for a locally linearized data model were used to estimate the confidence intervals and covariances of the regression constants. A comparison to prior correlations shows the proposed correlations to provide more accurate predictions and to span a much broader parameter space than prior work. Practical utility in design and optimization, and unavoidable limitations in developing such correlations are discussed.

Original languageEnglish (US)
Pages (from-to)1-12
Number of pages12
JournalJournal of Heat Transfer
Issue number2
StatePublished - Feb 2009


  • Confidence interval
  • Correlation
  • Flat-tube
  • Friction
  • Heat exchanger
  • Heat transfer
  • Louver-fin

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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