Insight: Gas turbine exhaust duct failures on offshore platforms
9
Lloyd’s Register services to the energy industry Johan Gullman-Strand, Ph.D. Senior consultant Lloyd’s Register ODS Lloyd’s Register ODS Gas turbine exhaust duct failures
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Risk mitigation: Investigation and analysis of gas turbine exhaust ducts. This presentation looks at the causes of cracks and breaks in gas turbines and how we can help minimise the risk and reduce the causes.
Transcript of Insight: Gas turbine exhaust duct failures on offshore platforms
Lloyd’s Register services to the energy industry
Johan Gullman-Strand, Ph.D.Senior consultantLloyd’s Register ODS
Lloyd’s Register ODSGas turbine exhaust duct failures
Lloyd’s Register services to the energy industry
Gas turbine exhaust ducts
Immediate problems
• Damage on duct walls, cracks, missing insulation,
• WHRU* failure, exhaust gas leaks , silencer degradation
• Emergency shutdown, loss of production
* Waste Heat Recovery Unit
Lloyd’s Register services to the energy industry
The main problems
•Structural integrity compromised by pressure fluctuations in the highly separated flow
•Start-up and shutdown causing excessive thermal stresses.
Lloyd’s Register services to the energy industry
Lloyd’s Register ODS services and solutions
•Failure investigation
•Coupled analysis of complete system (FSI)
•Fluid Dynamics (CFD)
•Structural analysis (FEA)
•Analytical evaluation of old and new designs
•Verification by on-site measurements•Pressure, vibration, temperature, strain
Lloyd’s Register services to the energy industry
Pressure, vibration, temperature, strain
Lloyd’s Register services to the energy industry
FSI Response
Lloyd’s Register services to the energy industry
Summary
• Benefits:• Capture complex interactions.
• Better understanding of failure mechanics.
• Provide knowledge and tools for re-design.
• The ODS advantage:• Extensive experience
• Combination of analyses and measurements
• Computational resources for coupled analyses.
• Experts in each field
Typical solutions:
Guide vane design
Valve re-design
Flange improvement
Duct insulation changes
Lloyd’s Register services to the energy industry
Turbulence
Immediate problems
• Damagage on duct walls, cracks, missing insulation,
• WHRU* failure, exhaust gas leaks , silencer degradation
• Emergency shutdown, loss of production
Services are provided by members of the Lloyd's Register Group. For further information visit www.lr.org/entities
For more information, please contact:
Johan Gullman-Strand M.Sc, Ph.d. Senior Consultant, Lloyd’s Register ODS
Lloyd’s Register group entity71 Fenchurch StreetLondon, EC3M 4BS
T +46 733 298 330
w www.lr-ods.com
