Gross Heat Measurement - Siemens SITRANS FX330 Operating Instructions Manual

OPERATION
6

6.8.2 Gross heat measurement

In order to calculate gross power the mass flow (compensated by density) is multiplied by the
specific enthalpy:
Gross power [Q
When measuring gross heat, internally both the flow totalizer and the energy totalizer are used.
The following configuration example describes an easy way to program all necessary settings.
For this example is assumed that the internal temperature and pressure sensor are used for the
gross heat calculation of superheated steam.
Function
C6.3 Extras
Enter process parameters:
C1.1 Fluid
C1.2 Medium
C1.6 Temp. Sensor
C1.6.1 Temp. Source1
C1.7 Pressure Sensor
C.1.7.1 Pressure Source
C6.5 Units
C1.10 Operating Values
C1.10.3 Oper. Density
Configure output and totalizers:
C2.1 Current Output
C2.1.1 Current Out. Meas.
C2.1.2 0% Range; C2.1.3 100% Range
C4.2 Energy Totalizer
C4.2.1 Measurement
C4.2.5 Start Totalizer?
Display two values on local display: (Gross power, Gross energy)
C5.3.1 Function
C5.3.2 Measurement 1. Line
C5.3.6 Measurement 2. Line
Table 6-37: Gross heat measurement
INFORMATION!
This is an example setup for basic gross heat measurement. Other setup options are feasible.
90
] = mass flow [Q ] x enthalpy [H]
H m
Parameters
Activate one of the meter type options "Heat" (for saturated steam and
temperature compensation) or "Heat & Dens. by Pres." (for superheated
steam and density compensation by temperature and pressure) by entering
the proper four digit code (if not activated by order). This needs to be done
once.
Steam
Superheated Steam
Internal ("Temp. Source2" must not be selected as "Internal")
Internal
Set units for temperature, pressure and flow.
Operating density is important for sensor limits but will not be used during
operation.
Gross Power
Enter value for 0% and 100% in selected unit.
Gross Power
Yes
Two Values
Gross Power
Gross Energy
www.siemens.com/flow
SITRANS FX330
08/2022 - A5E36751269-AG EN