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Ventilation Fitting Pressure Loss Coefficients

  1. May 17, 2010 #1
    Good morning,
    I'm calculating the pressure loss of a ventilation system for pot-off gas of an aluminum smelter using ASHRAE tables for fitting loss coefficients. The problem is that for much of the ducting, the diameters and flowrate ratios I have do not exist in the tables. (We're talking about Converging Tees, 90deg, 60" with 10" branches, 19m/s)

    Should I approximate the fitting loss coefficient using the closest combination of diameters and flowratios in the tables? even though my diameters and flow ratios are very very different from the closest?

    Thank you,
  2. jcsd
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