Elster Instromet 2000 - Page 38

Model 2000 Flow Computer Instruction Manual
2.0 GENERAL DESCRIPTION
Model 2000 issue 21 Page No
31
Calculation of Liquid Density at base conditions
9)
mm
LM
LS
CPLCTL ×
ρ
=ρ
Where
αT : Coefficient of thermal expansion of liquid Alpha in °C-1 Equation 3)
CTLm : Meter Correction Factor to API MPMS 12.2.5.3 1st Edition Oct 1995 Equation 4)
CPLm : Meter Correction Factor to API MPMS 12.2.5.4 1st Edition Oct 1995 Equation 5)
ρLM : Line Density of Liquid at metering conditions in kg/m3 Measured
ρLS : Base Density of Liquid in kg/m3 Equation 9)
tl : Line Liquid Temperature in °C Measured/Data Entry
pl : Line Liquid pressure in Bar.a Measured/Data Entry
tb : Base temperature in °C Data Entry
pe : Equilibrium pressure in Bar.a Data Entry
K0 : Temp. independent API constant ASTM-D-1250 Data Entry
K1 : Temp. independent API constant ASTM-D-1250 Data Entry
K2 : Temp. independent API constant ASTM-D-1250 Data Entry
βm : Compressibility factor in bar-1 API MPMS 11.2.1 Equation 6) or 8)
C : Intermediate Calculation Equation 7)
Condensate and Water Mass and Volume flow rate equations
10)
1
WC
=ς+ς
11)
()
(
)
CSCWSWLS
ρ
×
ς
+ρ×ς=ρ
12)
MMCSCM
CPLCTL
×
×ρ
=
ρ
13)
CLC
qMqM ς×=
14)
CS
C
C
qM
qN
ρ
=
15)
CM
C
C
qM
qG
ρ
=
16)
WLW
qMqM ς×=
17)
WS
W
W
qM
qN
ρ
=
18)
WM
W
W
qM
qG
ρ
=
Where
qML : Mass flow rate Liquid in kg/hr Measured
qMC : Mass flow rate Condensate in kg/hr Equation 13)
qNC : Volume flow rate Condensate at base conditions in m3/hr Equation 14)
qGC : Volume flow rate Condensate at line conditions in m3/hr Equation 15)
qMW : Mass flow rate Water in kg/hr Equation 16)
qNW : Volume flow rate Water at base conditions in m3/hr Equation 17)
qGW : Volume flow rate Water at line conditions in m3/hr Equation 18)
ρCM : Line Density of Condensate at metering conditions in kg/m3 Equation 12)
ρWM : Line Density of Water at metering conditions in kg/m3 Data Entry
ρLS : Base Density of Liquid in kg/m3 Equation 9)
ρCS : Base Density of Condensate in kg/m3 Data Entry
ρWS : Base Density of Water in kg/m3 Data Entry
ζC : Condensate Mass Fraction Derived from Equations 10 & 11
ζW : Water Mass Fraction Derived from Equations 10 & 11
CTLm : Meter Correction Factor to API MPMS 12.2.5.3 1st Edition Oct 1995 Equation 4)
CPLm : Meter Correction Factor to API MPMS 12.2.5.4 1st Edition Oct 1995 Equation 5)