XPLORE
Turbine Calculation Module
The Xodus Turbine Calculation Module utilises operational
data, custom calculations, industry standard calculations
and advanced simulation technology to provide a state
of the art monitoring system analysing all aspects
of turbine operation and maintenance.
Each system is custom designed utilising the required
functionality from the following list:
› Online real-time visualisation
› Thermodynamic calculations
› Mechanical degradation monitoring
› Real time/ historical, predictive and ‘what if’ operating
modes.
Online Real-Time Visualisation
The Turbine Calculation Module gives the user the
ability to view a large amount of system data and
complex calculated
information in real-time. Such information is normally
only available following offline studies. Typical
plots available to the user are EGT (Exhaust Gas
Temperature)
-v- RPM (Turbine Speed), CDP (Turbine Compressor
Discharge Pressure) -v- RPM (Turbine Speed), EGHP
(Exhaust Gas
Horse-Power) -v- RPM (Turbine Speed), EGHP (Exhaust
Gas Horse-Power) -v- SFC (Specific Fuel Consumption),
EGT (Exhaust Gas Temperature) -v- EGHP (Exhaust
Gas Horse-Power).
Each plot shows the design curve and the limit
curve (both stored as configurable data). In
addition the
actual operating point is shown to provide indication
of where the turbine is operating in relation
to design/limit.
Click image to enlarge.
Thermodynamic Calculations
All such complex calculations are performed online
in real-time, are available through the user interface
and can be trended. For turbine monitoring we recommend
and utilise Multiflash. Multiflash gives us access
to a vast number of thermodynamic methods allowing
us to analyse each system and select the most appropriate
method.
NOTE: The XPLORE Emissions Monitoring System Module
is also available which provides additional information
regarding CO2, CO, NOx, SOx, UHCs and VOC emissions
helping the operator to meet IPPC regulations.
Mechanical Degradation Monitoring
Hot section component materials and coatings degrade
when they are exposed to service. The extent of
degradation depends on both metal temperature and
service time.
In a cooled component, the material and coating
degradation varies from location to location.
With the help of the performance monitoring system
the performance degradation of the turbine unit
can be evaluated and monitored. It is essential
to detect
degradation before corrective action can be started.
Real time condition assessment monitoring is an
important part of modern and efficient management
of industrial
drive machinery. Turbine performance is calculated
by monitoring certain parameters, e.g. fuel gas
flow, pressure, and speed. In order to reliably
monitor
performance, condition assessment monitoring system
has to produce
a reference value against which the real operating
value can be compared. Usually the reference value
is selected so that it represents the reference
value of a new turbine.
Real time / Historical, Predictive and ‘What
If’ Modes
The system can operate in any one of three modes.
Real time operation shows the current status of
the turbine.
All of the measured and calculated data is saved
to a historical database therefore the user can
go back
in time and review historical operation.
The system can include the ability to run in predictive
mode so that in addition to real-time information
the user also has information regarding the operation
of
the turbine in the near future. Depending on the
complexity of the model we can predict up to 36
hours into the
future.
In ‘what if’ mode the user can freeze the
system and change any of the input parameters, for
example the gas composition, and review what happens
to the turbine operation. In this mode the real time
data is stored in the background and refreshed when
real time mode is reselected.
Click image to enlarge.
A typical architecture for a turbine monitoring system
includes the standard XPLORE framework linking to the
customer’s data historian. In the example the
system also incorporates the compression calculation
module. Along with custom calculations and information
from the Multiflash package supply the user via a web
server with real-time and historical (and if required
predictive and ‘what if’) information regarding
the operation of their system.
For more information contact:
Steve Hamilton, Director – Technology Division
Tel: +44 (0)1224 628307 Email:
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