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  • 1. Energy Efficient Solutions for FPSO Applications Presentation by Arne SpetalenHead of Global Sales, Topsides Systems Solutions for the Oil & Gas Industry
  • 2. Scope of Presentation1. Energy Efficient Solutions – What it means to Siemens.2. Energy Efficient Solution for FPSO’s – Variable Speed Drive (VSD)3. Mechanical versus Electrical Drive (Case Study)4. Summary Innovative and Reliable Solutions for Cleaner Energy WorldwidePage 2
  • 3. Energy Efficient Solutions; It all begins with CommitmentsOur Vision is to Create Innovative and Major R&D investments in Siemens AGReliable Solutions for Cleaner Energy €3.9 billion in fiscal 2009, or 5.1% of revenueWorldwide 31,800 R&D employees worldwide 17,000 software engineers 176 R&D locations in over 30 countries around the world 7,700 inventions in FY2009 More than 56,000 active patents Our patent position in fiscal 2009: Germany: No. 2 Europe: No. 2 USA: No. 12 Innovative and Reliable Solutions for Cleaner Energy Worldwide Page 3
  • 4. Subsea Power and Processing What’s involved? Production systems moved to sea bed Now – minimizing topsides Future – sub sea to beach – no topsides Operating - subsea transformers, VSD, motor, power distribution Near future – sub sea compression, process packagesPros / Cons Selected References Significantly lower investment than surface installations Statoil testing – subsea capable compressor ordered Unmanned facilities – safety for personnel StatoilHydro – SnoA, COP 8 Control System Reduced environmental impact Statoil – SnoB, Gas Detection Suitable for arctic conditions / hurricane areas Norsk Hydro – SnoA, X-tree & Well Control Sound economic arguments Saga / Hydro – Snorre B, DIACS Subsea experience to be built for machinery – reliabilitysubsea to be proven Innovative and Reliable Solutions for Cleaner Energy Worldwide Page 4
  • 5. Electric Power on Sea (EPOS)•EPOS explores the value of stranded gas in areas in areas with no or limited gas transport infrastructure no•EPOS employs commercial plant technologies with very low risks related to production and operation related•It refines “lost” and marginal energy resources and offers a very low environmental footprint lost” environmental Innovative and Reliable Solutions for Cleaner Energy Worldwide Page 5
  • 6. Cable from Shore Involves: Centralized power plant onshore Electrical power transmission by HVAC or HVDC technology depending on distance to grid/consumer and power capacity All electric drives on vessel / platformOverall Objective Selected References Removes CO2 obligations from platform operator Centralised power production reduces overall emissions Statoil FEED - Luva project, North Sea and increases efficiency 300km offshore Maintenance costs reduced by removing the GT’s Increases reliability / availability on platform Economic case strong for cables to say 100km; study looking at 300km Innovative and Reliable Solutions for Cleaner Energy Worldwide Page 6
  • 7. Utilization of VSD as an Energy Efficient Solutionfor FPSO Applications Variable Speed Drive (VSD) Definition A VSD regulates the speed and rotational force, or torque output, of an electric motor.•Significant technology improvement over the last 15 years•General knowledge about VSD’d have resulted in a largermarket share in the offshore market - fixed and floaters•Wide speed range up to 15.000 rpm•Currently, VSD’s up to 65 MW are being put in operation 23 MW VSD in Holland Innovative and Reliable Solutions for Cleaner Energy WorldwidePage 7
  • 8. Development of Variable Speed Drive Systems Project Snøhvit/ Hammerfest Project SEGAS technical complexity & power range Project TIGA 2x65 MW VSDS 1x32 MW VSDS Project OMAN 2x17 MW starter- as prime movers helper VSDS of refrigerant network analysis compressors 4x10 MW starter- dynamic & network analysis helper VSDS vibration study dynamic & incl. scheme for full load vibration study export of power performance test full load MV switchgear Automation performance test 4x7,5 MW VSDS SHELL- specification order date 1996 1999 2002 2002 operational 2000 2003 2004 2005 Innovative and Reliable Solutions for Cleaner Energy Worldwide Page 8
  • 9. VSD Drive – Key Features Converter transformer Frequency Converter Adapt the power system voltage to the converter Rectify incoming power voltage & frequency to & motor voltage generate a variable output voltage & frequency Provide for isolation and the pulse supply system for the motor Limit possible fault current in thyristor circuit Motor Induction motor ~2- 20MW, to 15,000 rpm Synchronous above ~8MW, to 7000 rpm VSD’s provides:•Limited thermal and mechanical stress In Summary:•No measurable tear and weir over time A VSD solution is robust•Not sensitive towards frequent starts and loads variations and almost .•Limited number of moving components – easy to handle maintenance free•Suited for 3-5 years continuous operation 3-•Small demand for stocking spare parts (very few required) Innovative and Reliable Solutions for Cleaner Energy Worldwide Page 9
  • 10. Mechanical versus Variable Speed Drive; Case Study Innovative and Reliable Solutions for Cleaner Energy WorldwidePage 10
  • 11. Energy Efficient Solutions Specifically for FPSO’s Selection of drivers for high speed rotating machinery. Electrical versus mechanical On what basis is this decision being made? By the mindset of individuals and/or by what’s regarded as ”company standard”? Or By a proper case evaluation where energyefficiency is one of the key criteria for making the decision? Innovative and Reliable Solutions for Cleaner Energy Worldwide Page 11
  • 12. Commercial Considerations Gas Turbine Electric VSD Auxiliary equipment - Air intake, anti-icing and exhaust - Utility substation silencer - Harmonic Filters - Air filtration & Noise enclosure - Converter building or module - Fire and gas detection & Fighting if required - Emission control and regulation - Additional lube oil system - Hydraulic starter - Water-washing system on-/offline - Ventilation for cooling and pressure- preset Maintenance Very High Very Low Scheduled Downtime Approx. 5 days p.a. Approx. 1 day p.a. CAPEX Low High Spare Parts High Low Insurance cost High (Due to fire hazard) Low Pollution, emissions High “None” Innovative and Reliable Solutions for Cleaner Energy WorldwidePage 12
  • 13. Performance Related Considerations Gas Turbine Electric VSDOutput Power Highly depends on temperature No adjustments for site conditions.Output power vs speed Almost constant Proportional to speedFull load efficiency < Approx 40 % > 96%Part load efficiency < low at 70% load Always running at high efficiencyStarting reliability Lower than 100 % Typically 100%Reliability Medium HighAvailability Medium HighRestart after forced shut-down (trip) Typically about 2 hours ImmediatelySpeed control range Limited speed range Less limitationSpeed control accuracy High HighDesign flexibility Low HighStarting time Medium Short (seconds)Load assumption Approx. 15 min. after successful start Instantaneous after switch-on, but limited to compressorInfluence on power supply None Depends on char. of grid. Harmonic study requiredDynamic braking Impossible StandardRun out by power failure Short time to stop Longer time (motor inertia), requires more oil Innovative and Reliable Solutions for Cleaner Energy Worldwide Page 13
  • 14. Summary of Evaluation Criteria Speed control Impact of ambient range / part Operational conditions CAPEX* OPEX load efficiency flexibility ** Starting Availability / Interfaces / reliability/ Weight / Reliability hook up # starts allowed footprint Start up time *CAPEX – based on multiple GTGs and comps ** When moving from one field to another – ease of adaptation with existing VSD drives Innovative and Reliable Solutions for Cleaner Energy WorldwidePage 14
  • 15. Case Study: Mechanical versus Electrical Drives Traditional concept using gas turbines as compressor drives: In this example your drive configuration on the FPSO appears as follows: Electrical load, GT rated at 32 degC 19,000 kW (3 x 50%) Compression 2 x 100% LP shaft power 2,200 kW each Compression 3 x 50% HP shaft power 4,300 kW eachPG: 3 x 13 MW ISO (n+1) LP: 2 x 3.1 MW ISO HP: 3 x 6.0 MW ISO G G Total installed gas G turbine power: Innovative and Reliable Solutions for Cleaner Energy Worldwide Page 15 63,2 MW
  • 16. Case Study: Mechanical versus Electrical Drives Here, the gas turbine drives are replaced by VSD’s: Power Generation 19,000 kW 19,000 Power for LP Compression (2x100%) 2,200 kW each 2,200 Power for HP Compression (3x50%) 4,300 kW each 8,600 Σ 29,800 kWPG: 4 x 13 MW ISO (n+1) LP: 2 x 2.4 MW drives HP: 3 x 4.7 MW drive M M G G G G G G G G M M Total installed gas M turbine power:Page 16 52 MW Innovative and Reliable Solutions for Cleaner Energy Worldwide
  • 17. Summary of ExampleInitial concept: By introducing VSD’s, your G total installed gas turbine G duties drops from 63,2 MW G to 52 MW. More importantly, number of gas turbines is reducedAlternative concept: by 50% (from eight to four) and we’re only having one turbine type M G G G G G G G G M M M M Innovative and Reliable Solutions for Cleaner Energy WorldwidePage 17
  • 18. Final Word: Why are VSD systems normally the”looser” when decisions are made ? 1. Commercial 2. Psychological: 3. Technical: If the reasons : No secure source of Electrical equipment, high Outside the comfort are not electrical power available voltage in particular, zone of mechanicalpsychological, at the facility represent a safety issue for personnel when itthen these are the reasons. the workers comes to vibrations and Uncertainty regarding the harmonics as applies to The procurement policy is rotor dynamics from an VSD systems. focusing entirely on electrically driven shaft CAPEX, OPEX is not Need for step-up gear for Lack of offshore considered important special applications references "Unproven equipment“ Outside the comfort Focus is on rotating zone of ops personnel machinery drives alone and not in combination Lack of competence and with the power generation skills to evaluate VSD plant systems and solutions Innovative and Reliable Solutions for Cleaner Energy Worldwide Page 18
  • 19. Thank you for listening Water treatment Power Distribution VSD Power GenerationPower Management System Compressor Systems Control system & Communication (Offshore – Onshore) Innovative and Reliable Solutions for Cleaner Energy Worldwide Page 19