Hi Cheresources Members,
For the differential pressure type flow meter the mass flow of liquid or gas can be calculated as follows (Ref: ISO 5167-2003 in Metric Unit). Is there any "generalized or model-specific temperature and pressure compensation factor" to convert measured point flow to actual (or real) flow ?
Qm = 3.512407(10^-5)* C * (1-β^4)^-2 * ε * X * d^2 * Fs * (DP * ρ)^0.5 .................(1)
Qm=Mass Flow, [kg/s]
C = Orifice Discharge Coefficient = func of (D, β, ReD), [-]
β = Orifice Diameter to Pipe Diameter Ratio = d/ D, [-]
d, D = Diameter of Orifice, Pipe, respectively, [mm]
ε = Expansion Factor = func of (β, DP/p Ratio, κ(=Cp/Cv)), Cp, Cv=Isobaric, Isochoric Specific Enthalpies respectively
X=Flow Meter Reading Scale as 0~10,[-]
Fs=Steam Quality Correction Factor = 1 + 0.0074 w , w= Liquid Content in Steam, [w%], Fx=1 for Liquid or Gas
DP=Differential Pressure, [Pa], p = Absolute Inlet Pressure,[bar]
Any guidance would be helpful for me, thanx in advance.
~Stefano