Tag: FINNED TUBES
AC-19 Mixed Convection Heat Transfer Outside High-finned Tube Bundles in Low Airflow
June 23, 2022Modeling natural-draft air coolers requires accurate prediction of airside heat transfer coefficients at low airflow rates. HTRI has collected additional data from the Air-cooled Unit (ACU) to develop a correlation for mixed convection that predicts low airflow heat transfer. The improved correlation, based on Rayleigh and Reynolds numbers, results in an...
TT-15 Single-phase vapor and condensing heat transfer across inline low-finned tube bundles in cross flow
January 26, 2017Component: Xace, Xist Applicable to: Version 7.3 and previous Date posted: 22 May 2012 Last updated: 7 September 2017 Externally finned tube bundles can be specified for applications where the outside heat transfer coefficient is less than the inside coefficient. Using inline low-finned tubes in 90-degree layouts allows for cleaning by mechanical means....
PFE-3 Prandtl Number Effect on Offset-strip Plate Fin via CFD
January 16, 2017Using CFD simulations of laminar flow in an offset-strip fin geometry validated with experimental data, we have confirmed that the Colburn j-factor can be substantially overpredicted for fluids whose Prandtl number is significantly greater than that of air. In addition, we determined that the j-factor varies inversely with a Prandtl number...