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August
2019
HYDROCARBON
ENGINEERING
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York Process Systems
York Process Systems (YPS), a global leader in process
refrigeration and gas compression systems, offers extensive
engineering, factory packaging, control system, and field
service capabilities. YPS provides proven solutions to the oil
and gas, and petrochemical industries through
manufacturing facilities in the US, Brazil, China, and Europe,
and a sophisticated US$6.7 million high-pressure,
high-capacity screw compressor testing laboratory in the
US.
The company’s equipment has performed in some of
the most complicated processes in the most demanding
industries for over a century. No matter the application
– fuel gas boosting, open cycle process gas compression, or
closed cycle refrigeration – and no matter the capacity, YPS
offers a large-capacity solution
YPS engineers design the optimum system for specific
applications, from utilising Frick® brand screw compressors
and York® brand centrifugal compressors in customised
systems, to modifying standard chiller products to handle
process cooling requirements.
Its broad range of oil-flooded screw compressors
includes anti-friction or API 619-compliant sleeve-bearing
designs. It also offers a comprehensive selection of
Siemens Oil & Gas
Siemens Oil & Gas offers a comprehensive portfolio of
turbo and reciprocating compression solutions for the oil
and gas industry and other markets. Compressor solutions
can be standardised or tailored to meet customer needs in
a variety of industries – such as on- or offshore oil and gas
production; pipelines; air separation; metallurgy; chemicals,
petrochemicals; and refineries, among others. Drive systems
employ industrial and aeroderivative gas turbines, steam
turbines or electric motors.
Reciprocating compressors range from medium- to
high-speed separable units driven by engines or electric
motors, to large, slow-speed, motor-driven process
reciprocating compressors. Siemens was selected to supply
three Dresser-Rand® 5HHE-VL-NL reciprocating compressors
for a new, state-of-the-art steam methane reformer (SMR)
in Texas that will become the largest hydrocarbon
production unit in the US.
The range of turbocompressors includes integrally geared,
single-shaft and axial compressors that can be matched with
all kinds of drive systems for highest efficiencies, optimum
performance and lowest life cycle costs. For the Encana
Pipestone Processing Facility in Alberta, Canada, Siemens was
chosen to supply an SGT-750 gas turbine driving two DATUM
compressors for gas compression service and an electric
motor-driven DATUM compressor for refrigeration
compression. This order marks the first North American gas
process plant application for the SGT-750 turbine that offers
customers a lightweight industrial gas turbine that maintains
the robustness, flexibility, and longevity of traditional
heavy-duty industrial gas turbines. The DATUM compressor,
known for its efficiency, reliability, and ease of maintenance,
is ideally suited for the un-spared feed/sales gas and
refrigeration compression applications.
Braskem entered into an agreement with Siemens earlier
this year to modernise a cogeneration power and steam
plant at its petrochemical complex in São Paulo, Brazil,
whereby Siemens will implement a fully integrated and
redundant equipment solution, including two SGT-600 gas
turbines, an E-house, and an extension of the existing
high-voltage substation, three reciprocating compressors, an
advanced load-shedding system, and associated software
for plant control.
Siemens will also supply two SGT-300 industrial gas
turbines for an established Montney producer in Alberta,
which will mark the first application of an SGT-300 turbine
in Canada.
Siemens’ SGT-750 turbine will soon debut in its first
North American gas process plant application.
verification if the diagnostic algorithms are prompt enough
in their reaction.
One important feature of TGSim Plus relates to one of the
key subsystems of the gas turbine, i.e. the compressor.
Although a gas turbine compressor is not affected by
complex variations of the properties of the gas being
compressed (as air can be considered as an ideal gas), its large air
flow requires axial flow compressors with many stages. Their
head and compression ratio balancing varies with the operating
conditions or during transients such as start-up, which requires
multiple surge protection controllers, acting on bleed flows, and
accurate mapping of the compressor. In order to better model
the stage balancing and to account for the pneumatic and
thermal accumulation effects in the stages and ancillary
volumes, the TGSim Plus’ compressor model (derived from the
COMPSYS suite used for process compressors) can be either a
single map or a multiple map model, i.e. split into a number of
compression stage sets and lumped volume sequences, each
characterised by multidimensional maps, i.e. considering several
values of inlet guide vane angle (IGVA) positions (see image on
p. 92).