packaging turbomachines for offshore · pdf filepackaging turbomachines for offshore...
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© 2013 Solar Turbines Incorporated
Packaging Turbomachines for
Offshore ApplicationsRainer Kurz
Solar Turbines Incorporated, Klaus Brun
Southwest Research Institute, Marybeth Nored
Apache Corp
Gas Electric Partnership 2013
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© 2013 Solar Turbines Incorporated
Scope
• Turbomachinery in Offshore Applications
• Certification
• Movement and Deflection
• Air
• Fuel
• Weight
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© 2013 Solar Turbines Incorporated
Offshore Applications
Generator Set
Mechanical Drive
Multi Body Compressor Set
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© 2013 Solar Turbines Incorporated
Gas Turbine Installation on an FPSO
• Power Generation
• Mechanical Drive
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© 2013 Solar Turbines Incorporated
Certification
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© 2013 Solar Turbines Incorporated
Certification and Compliance
Classification of Floating Offshore Installations, Fixed
Location – FPSO / FPU, TLP, SPAR, CTs
Facilities Offshore Guide –Fixed Leg Platforms
Steel Ship’s Rules for Building and Classing – FPSOs
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Division 1Zone 1
Division 1Division 2
Hazardous LocationsHazardous Locations
1000 Hrs./Yr.10 Hrs./Yr.1 Hr./Yr.
Duration of time Gas is Present
Risk
Not
Classified
Zone 0
Zone 2
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Movements and Deflection
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Movements
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© 2013 Solar Turbines IncorporatedTOP VIEW
SIDE VIEW
Fluid Management
Evaluate L/O Tanks for
Pitch & Roll using CFD
• Bearing Scavenge Systems
• Package Scavenging
• Separate Lube Oil Tank
• Lube Oil Tank Baffles
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Moderate Package Scavenge System
PACKAGE SCAVENGE OIL TANK
Lube Oil Tank and Drain Vent System Lube Oil Supply System
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Installation Orientation
Parallel Orientation
ROLL ANGLE
Perpendicular Orientation
OIL CAN’T
DRAIN TO
TANK
OIL CAN
DRAIN TO
TANKROLL ANGLE
OIL CAN
DRAIN TO
TANK
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© 2013 Solar Turbines Incorporated
Deck Deflections
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© 2013 Solar Turbines Incorporated
Base Plate MountingBase Plate Mounting
TTS105-001
PACKAGE
MOUNTING
SURFACE
DECK
MOUNTING
SURFACE
STAINLESS STEEL VIBRATION
ISOLATORS
SPHERICAL
BEARING
Anti-Vibration
Mount (AVM)
MethodGimbal Mount Method
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© 2013 Solar Turbines Incorporated
3-Point Mount Base Plates
TTS10
Single-Piece Base Plate
Two-Piece Base
Plate
Two-Piece Base Platewith Sub-Base
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© 2013 Solar Turbines Incorporated
Air Filtration
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© 2013 Solar Turbines Incorporated
Environment: The issues
• Environmental conditions can lead to fouling and corrosion
– Viscous hydrocarbons from flares, exhausts
– cement dust, shot blast, iron oxides
– salt crystals
– cyclic wet/dry conditions etc.
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© 2013 Solar Turbines Incorporated
Air Filters Trade-Off
Cost,Size
Pressure Loss GT Main
tenance
Effectiveness
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© 2013 Solar Turbines Incorporated
Behavior of Airborne Salt with Changes
in Relative Humidity
10 20 30 40 50 60 70 80 90 1000
DR
OP
LE
T
DIA
ME
TE
R
RE
LA
TIO
NS
HIP
SALT DROPLET SIZE RELATION WITH HUMIDITY
Low Transitional High
Solids Both Liquids
~ 5
to
10 m
icro
ns
~ 0.5 to 2 microns
Filter has to deal with salt dissolved in water and salt particulates both in the airstream and in its surface!
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Fractional efficiency for filter elements
1ST-STAGE
VANE
SEPARATOR
DRAINAGE SYSTEM
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HIGH VELOCITY INLET SYSTEM MEDIUM VELOCITY INLET SYSTEM
Offshore Air Inlet Systems
© 2010 Solar Turbines Incorporated
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© 2013 Solar Turbines Incorporated
Fuel
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© 2013 Solar Turbines Incorporated
Hot Corrosion
• A form of accelerated oxidation
• 1100 to 1750F temperature range: two types
– Type I, High Temperature (1350 – 1750F )
– Type II, Low Temperature (1020 – 1350F )
• Na2SO4 commonly responsible
• Sodium intake is critical
• Potassium, vanadium, and lead also contribute to hot corrosion
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© 2013 Solar Turbines Incorporated
Dealing with Contaminants in Gas Fuels
• Scale, Rust, Slag, Dirt
– Clean and PassivatePiping
– Use Proper Filtration
Fuel Filters and Coalescers
• Condensibles, Oils, Water
– Use Coalescing Filtration
– Fuel Heating
– Fuel Analysis (up to C14!)
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© 2013 Solar Turbines Incorporated
Weight
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Offshore Concepts Gas Turbines and Electric Drives
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1Driven compressors not included (same for all scenarios). Weight for Generators (EMD Solutions) not included
Installed Weights and FootprintsDriver Systems for 10 MW Compressors
26 m2
40,000 kg
Electric Drive –Constant Speed
41 m2
60,000 kg
Electric Drive –Variable
Frequency
32 m2
60,000 kg
Electric Drive –Variable-Speed
Gear
30 m2
55,000 kg
All Gas Turbine
Driver System
Footprint
Driver System Weight
System Option1
• Driver System Weight and Footprint Impact Cost
• Gas Turbine and Variable Frequency Electric Drive Systems Comparable
– Provided Full Electrical Equipment Scope Included in Analysis
• Constant Speed Option Compact, But Limits Operability, Increases Size of Power Generation
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© 2013 Solar Turbines Incorporated
Questions?Questions?