Flow Measurement in Saturated Steam Application for Custody Transfer
Multivariable flow measurement to optimize steam usage and reduce risk of overcharge for utility costs
Increase safety level of online sensor maintenance while providing rep
Accurate and reliable flow measurement for saturated steam usage to monitor utility costs enables confirmation of steam billing and ensures there is no overcharge for steam. Without a reliable steam measurement point, plants may have minimal insight to increasing utility costs. Unstable meter performance may require more frequent replacement and maintenance, causing increased process shutdowns. Online sensor replacement leveraging the CriticalProcess™ Vortex Flow Meter design can greatly enhance safety level by verifying the sensor containment. A more reliable performance and reducing frequency of sensor replacement will optimize the steam measurement point.
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Product Solutions
The Rosemount 8800 MultiVariable Vortex Flow Meter combines temperature and flow devices into a single, highly accurate instrument, eliminating the costly installation of two or more separate devices. The integrated, removable temperature sensor provides an accurate process temperature measurement and is isolated from the process and separate from the Vortex flow sensor. With the input from an external HART® pressure transmitter, it also provides temperature and pressure compensation, enabling compensated mass flow and corrected volume in steam and liquid applications.
- Temperature and pressure compensation capability provides steam and liquid mass flow measurement eliminating the need for a flow computer
- The integrated temperature sensor provides accurate temperature measurement without the need of an external thermowell or separate temperature sensor
- Superheat Diagnostics helps detect superheat steam degradation
Flow Meter Accuracy
± 0.70% of mass flow rate in water using 8800 MultiVariable (MTA option)± 2% of mass flow in steam using 8800 MultiVariable (MTA option)± 1.3% of rate at 30 psia through 2,000 psia in steam using 8800 MultiVariable (MPA option)± 1.2% of rate at 150 psia in steam using 8800 MultiVariable (MCA option)± 1.3% of rate at 300 psia in steam using 8800 MultiVariable (MCA option)± 1.6% of rate at 800 psia in steam using 8800 MultiVariable (MCA option)± 2.5% of rate at 2,000 psia in steam using 8800 MultiVariable (MCA option) ± 0.65% of volumetric rate for liquids (uncompensated)± 1% of volumetric rate for gas and steam (uncompensated)
Turndown
38:1
Output
4-20 mA with HART 5 or 7 (MTA/MPA/MCA option)
4-20 mA with HART 5 or 7 and scalable pulse output (MTA/MPA/MCA option)
FOUNDATION fieldbus ITK6 with 2 Analog Input blocks, 1 Backup Link Active Scheduler function block, 1 Integrator function block, and 1 PID function block(MTA option)
Modbus RS-485 with device status and 4 variables (MTA option)
4-20 mA with HART 5 or 7 and scalable pulse output (MTA/MPA/MCA option)
FOUNDATION fieldbus ITK6 with 2 Analog Input blocks, 1 Backup Link Active Scheduler function block, 1 Integrator function block, and 1 PID function block(MTA option)
Modbus RS-485 with device status and 4 variables (MTA option)
