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Flow-X─ Function Reference
Flow-X General functions - fxISO5167_Venturi
standard!)
When 'User-defined' is selected then the
input 'Discharge coefficient' will be used in
the calculations instead.
Pressure Location
1: Upstream
Input 'Pressure' represents the
pressure at the upstream pressure
tapping (p
1
).
Since the absolute pressure is
usually measured at the upstream
tapping this is the most common
setting.
2: Downstream
Input 'Pressure' represents the
pressure at the downstream
tapping (p
2
).
-
1
Temperature
Location
1: Upstream
Input 'Temperature' represents the
upstream temperature (t
1
).
2: Downstream
Input 'Temperature represents the
temperature at the downstream
tapping (t
2
).
3: Recovered
Input 'Temperature' represents the
downstream temperature at a
location Where the pressure has
fully recovered (t
3
).
Since temperature measurement is
usually downstream of the flow
device this is the most common
setting.
-
2
Temperature
Correction
This parameter specifies how the
temperature should be corrected from
downstream to upstream conditions (or
vice versa)
1: (1-
)/
Isentropic expansion using (1-
)/
as the temperature referral
exponent
2: Constant
Isentropic expansion using input
'Temperature Exponent' as the
temperature referral exponent [-].
Please note that this value must be
< 0
3: Joule Thomson
Isenthalpic expansion using input
'Temperature Exponent' as the
Joule Thomson coefficient [°C/bar].
This method is prescribed by
ISO5167-1:2003.
3
Temperature
Exponent
Refer to input Temperature Correction
Unit depends on input Temperature
Correction value
-
-
°C/bar
0
Density Location
This parameter specifies if and how the
density should be corrected from
downstream to upstream conditions (or
vice versa).
-
1
Summary of Contents for flow-x
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