ABB 800xA Operation page 119

Section 9 Heat Exchanger Asset Monitor (HXAM)
ACD will be created. The ACD will inform plant operations personnel that the heat
exchanger operational efficacy has fallen significantly and should be investigated
further.
Conversely, if Enew has gone up by a percentage (E_Improvement_Level) that is
configured by the user or more, an ACD will be created indicating that the heat
exchanger Performance Factor has improved and similarly, an ACD will be created.
The ACD will indicate that the heat exchanger Performance Factor has improved
significantly if Enew has gone up by a percentage
(E_Significant_Improvement_Level) that is configured by the user or more. At this
point, the BOPS used for the comparison will be replaced with the current COPS, if
it persists for more than three times the execution interval.
The Asset Monitor checks to determine if one or more BOPS have gone stale. A
BOPS is defined as going stale when the BOPS has not been referenced during a
specific time period. If any one or more BOPS go stale during Monitoring, an ACD
is created informing the plant operations personnel that one or more BOPS have
gone stale. At this point the Asset Monitor automatically goes back to Training.
Logging Function
If the Logging (Enable_Logging_Data) is enabled at configuration, the following
two additional functions will take place during training and operation of the Heat
Exchanger Asset Monitor:
•
•
Refer to
Optional Reporting
Optionally (to be specified at Asset Monitor configuration time), the Heat
Exchanger Asset Monitor can also send an ACD reporting any of the following
identified conditions:
3BUA000150-600
Heat Exchanger Asset Monitor will execute once per minute, regardless of E
calculation/comparison period.
During each execution, all field inputs and calculated variables of interest will
be recorded in a flat text file by appending a comma delimited line of data to
the existing log file.
Log File Description (.csv file) on page 176 for details on the Log File.
Methodology
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