CTrend©
PERFORMANCE ANALYSIS SOFTWARE FOR PROCESS CENTRIFUGAL COMPRESSORS (OIL & GAS)
Software Concept
CTrend is specialized software for the thermodynamic and
performance analysis of process centrifugal
compressors designed to API617 chapters 1 & 2, which correspond to between-bearings design type (also
known as, single-shaft compressors). Starting from a known reference/design operating condition (datasheets and compressor map available as input), CTrend enables the estimation of the adapted performance envelope at off-design operation; off-design means an offset in process parameters and gas composition or a degraded machine condition (degraded seals, increased clearances, wear and tear, fouling, etc.). The simulation can encompass multi-section train arrangements.
CTrend implements real gas equations of state (GERG2008, AGA8) and is geared towards natural gas
upstream/production, midstream as
well as refinery/petrochemicals and
other hydrocarbon gases and process
air applications while the analysis can
encompass multi-casing tandem train
lines with up to four (4) compression
phases per set of project file.
CTrend provides a unique investigation and assessment tool for the process engineer and operational crews. The underlying principles are common - for example similitude law - so, virtually any OEM brand
machinery can be simulated (e.g.,
Siemens/Dresser-Rand, GE/BakerHugues, Man Diesel and Turbo, Hitachi,
Mitsubishi).
Compatible Machines
Baker Hugues (former GE Oil & Gas): BCL/MCL/PCL
Siemens Energy/Dresser-Rand: STC-SC/STC-SV/DATUM (D-R)
Hitachi: BCH/MCH/PCH
MAN Diesel & Turbo: RB/RH
Solar Turbines: C series
Above is a non-exhaustive list of manufacturers and models.
Download
Download CTrend (portable version) or alternatively (setup version)
(Windows 10 OS)
30-day free evaluation available.
See presentation
Check also on this website:
centrifugal compressor performance evaluation tool online
centrifugal compressor sizing calculations / tool
stage to stage vs. section to section simulation considerations
Intuitive Graphical User
Interface (GUI) for the
process simulation
CTrend incorporates a process input
mask with search criterion options
allowing the user to iterate on speed,
inlet or discharge pressures, or flow.
The user can tune the control line
distance and the software calculates
automatically the point at surge
control, and choke when required.
Up to 20 alternative operating cases
can be created and up to 10 speed
lines can be added to the operating
envelope with graphical and tabular
maps available including all typical
compressor output variables with
printout reports and Excel exporting.
Advanced methods for performance characterisation
CTrend is equipped with data-driven algorithms that can model the reference
operating map of an existing compressor and automatically generate a
characterisation, so-called thermodynamic signature, of the machine. Subsequently
this signature can be used to simulate off-design conditions.
CTrend has an edge
over its competitors in that it is uniquely equipped with methods spanning from
simple 2D linear regression to more sophisticated nonlinear interpolations (2D polynomial / splines) methods including
configurable artificial neural networks. In this way, the user has a wide range of methods in order to calibrate the model to the compressor map/data at hand, especially should
data with inherently more complex patterns need to be tackled.
Put differently, CTrend leverages the predictability window by calibrating the characterisation of the compressor to the reference/design OEM map
PLUS any alternative cases that happen to be documented (i.e., OEM map and datasheet). Volumetric, efficiency, head shifting can be applied if needed and offer an extra layer of fine tuning.
While such techniques and methods are primarily intended for compressors
operating within variable speed performance envelopes, CTrend offers as a
premium the capability to model fixed speed units provided certain conditions are
met (for further details, see QuickStart manual provided with install package).
SCADA/DCS data fetching via MODBUS TCP/IP or RTU
Trending and 3rd-party interfacing module (https://www.modbustools.com) for MODBUS data fetching is available
thereby enabling live performance monitoring.
Companion Tools
CTrend provides several utility tools for example the preliminary centrifugal compressor sizing tool QHmap.
To know more:
https://ctrend-tech.com
To get you started, a 30-day evaluation free access to the tool is available. In addition, we offer you a 1-hour demo session to be scheduled via remote conferencing.
Contact: compressors (include '@') ctrend-tech.com (sollicitations for seo, website/app development are directed to the bin).
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