KEP SUPERtrol II Manual
Also see for SUPERtrol II: Startup guide
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Contents
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SUPERtrol II Flow Computer100ILVA Flowmeter - This meter type requires an initial linearization using the lineariza-tion table. In addition, the following specialized corrections are required.For Gas/Steam Expansion (imperial) Y = 1 – (115.814 • (dp / p) • 0.0001)Where: Y = gas expansion correction (NOTE: Y=1 for liquid)dp = differential pressure - inches water gaugep = upstream pressure - psiaFor Reynolds Number (volumetric calculations for Gas/Steam)Cre = (1 – (n / Qn)-1to a maximum value of mWhere: Cre = Reynolds number correction (NOTE Cre = 1 for liquid)Qn = nominal water volumetric flowrate (column 6)m = (see table below)n = (see table below)Meter Size n mDN50 2.53 1.200DN80 0.64 1.125DN100 0.21 1.100DN150 0.13 1.067DN200 0.07 1.050DN250 0 1DN300 0 1The final gas expansion and Reynolds number correction is: Qc = Qn • Y • CreFor Volumetric Calculations: (calculate the density corrected volumetric flowrate):Qd = Qc • (Dn / Da)0.5Where: Qd = density corrected volumetric flowrateQc = nominal water volumetric flowrate (column 6) corrected forReynolds Number and gas expansion effects.Da = actual flowing density of working fluidDn = nominal density of water at reference conditionsOnce corrected for density a further correction is required to take into account theeffect of temperature on the ILVA primary element.Temperature CompensationFor Volumetric Calculations: Using the value of Qd derived above, the temperaturecorrected flowrate can be calculated: Qa = ((Ta - Tref) • 0.000189 • Qd) + Qd)Where: Qa = actual volumetric flowrateQd = density corrected volumetric flowrate (from above)Tref = reference temperature in °C (generally 20°C)Ta = actual flowing temperature of working fluid (in °C)It is possible to convert from a mass flowrate to a volumetric flowrate and vice versausing the following simple formula: Ma = Qn • DaWhere: Da = actual flowing density of working fluid7.3.13ILVA Flow MeterEquations |
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