Design/Project Engineering & Execution Phase
- Technical feasibility study, bid review, selection, specifications.
- Design appraisals.
- Rotordynamics design appraisals (lateral, torsional).
- Model testing/Campbell diagram of impellers.
- Appraisal of spiral grooved journal and thrust bearings dynamic properties (stiffness, damping, metal temps, peak pressure etc.).
- Magnetic bearings dynamic properties and control.
- Review of hardware design & construction drawings with OEM engineers/experts.
- Compressor-Expander assembly inspection and shop testing.
- Electro-mechanical-aerodynamics control system design review.
- Design and off-design performance.
- Refurbishment/Upgrade studies.
- Installation & commissioning matters and performance examination during warrantee period.
Operational Phase
- Reliability & Mission time (extension studies).
- Performance gap/stretch studies.
- Turbo-expanders malfunctions diagnosis and cure (vibration, noise, pulsation/acoustic, lube/seal, thermal signature, aerodynamic performance).
- Best practices of turbo-expander condition monitoring, operation and maintenance.
- Condition-based inspection & maintenance schemes and decisions.
- Pro-active performance appraisals of key parameters during steady state/transient modes to capture faults at embryonic stage before they turn in to full-scale problem that may lead to un-plan interruption in production.
- Actual flow measurement and calculation.
- On/off-lines condition monitoring schemes and performance package development (power & efficiency estimation).
- Root cause investigation of distressed components, failure and restoration (compressor/expander wheels, bearings, seals).
- Rotor balancing (high speed & low speed).
- Vibration, noise, pulsation diagnosis and cure.
- Control systems problems.
- Review/improvement of supervisory instrumentation.
- Best practices of condition monitoring, operation and maintenance.
- Alignment (hot/cold) and piping forces & moments.
- Life cycle cost & remaining life assessment.