Orifice/Pipe Diameter (Inches); Auxiliary Factor (Faux); Viscosity; Liquid Type - ABB Totalflow uFLO 6213 Application Manual

3.2.4

Orifice/Pipe Diameter (inches)

The Orifice and Pipe Diameter fields allow the user to set the orifice and pipe
diameters. These are entered as floating point values, as measured in inches.
Changes to the pipe and orifice will cause significant changes to the flow rate
calculation. These rate changes can be viewed within the Current Values tab.
3.2.5

Auxiliary Factor (Faux)

The Auxiliary Factor (Faux) is a direct multiplier to flow rate. The rate changes can be
viewed within the Current Values tab.
3.2.6

Viscosity

Viscosity is a measure of fluid resistance to flow. The default value for viscosity (water)
is 0.8970, centipoise. Larger values will decrease flow rate. Smaller values will
increase flow rate.
3.2.7

Liquid Type

The Liquid Type field allows the user to establish the liquid from a drop-down selection
field. The default is set to water.
If the user selects water as the liquid:
If the selection is any of the other choices:
Then the VCF is calculated as follows:
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VCF = ( 999.840 + 6379830e-2 * tfc – 9.10603e-3 * tfc^2 + 1.00527e-4 * tfc^3 –
1.12671e-6 * tfc^4 + 6.59180e-9 * tfc^5 ) / 999.012;
Tfc = Flowing Temperature in Deg C.
•
Unspecified hydrocarbon
•
Crude oils
•
Lubricating oils
•
Gasoline/napthene
•
Jet fuels/gasoline
•
Jet fuels/kerosene/solvents
•
Diesels/heating and fuel oils
If base gravity ( gb ) is > 0.6110
VCF = ( exp (-at * ( 1+ 0.8 * at );
At = deltaT * ( k0 / rhob^2 + k1 / rhob + k2);
Rhob = gb * 9999.012;
deltaT = tf – 60.0.
If ( 0.5 >= gb <= 0.611 )
VCF = 1 + (-1.162e02 + 3.026e-2 * gb – 2.087e-2 * gb^2) * deltaT + (-
2.840e-5 + 7.298e-5 * gb + 4.368e-5 * gb^2) * deltaT^2;
deltaT = tf – 60.0.
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