Methodology - ABB 800xA Operation

Section 9 Heat Exchanger Asset Monitor (HXAM)
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The calculated values are:

Methodology

The heat exchanger will operate at one or more OPS for long enough to be
considered steady state operation, such that Base Operating Point Set (BOPS) and
Comparative Operation Point Set (COPS) may be read and saved for comparative
Performance Factor calculations.
Monitoring
Before BOPS and COPS are compared, the OPS set pass under low pass filtering
and averaging. The HXAM-G will collect the set of input data values at every
execution interval (every one minute) till an absolute period of Monitoring Interval
time is reached. This is called Collection phase.
The next cycle is the Analysis phase, during this phase the collected data is applied
with a low pass filtering and the filtered values are averaged. This average value is
called COPS and is compared with the BOPS (trained or manually entered). The
low pass filtering is not applied if the Monitoring interval of HXAM-G is less than 4
execution time interval. After the analysis phase, the HXAM-G will continue with a
fresh collection of COPS values for another period Monitoring Interval. This cycle
of collection and analysis continues and this state of the Asset Monitor is called as
Monitoring.
3BUA000150-600
Mass flow less than 0 Kg/hr.
Mass flow greater than 1000000 Kg/hr.
Pressure less than -10,000 (any units).
Pressure greater than 10,000 (any units).
Volume flow less than 0 M
Volume flow greater than 1,000,000 M
Calculated Values
– E: Performance Factor.
– HD Hot: Hot Side Heat Duty.
– HD Cold: Cold Side Heat Duty.
3
/hr.
3
/hr.
Methodology
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