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

E johan.gullman-strand@lr-ods.com

w www.lr-ods.com