Case Study C: How can we help optimizing your maintenance events.
Large CCGT facility with multiple maintenance events per year with a renewed focus on plant efficiency
Scenario:
- Large CCGT plant with 6 blocks 2×1.
- While typically fuel consumption wasn’t a concern, recent market trends have shifted the business focus to efficiency.
- Limited resources/expertise to optimize plant performance.
- Maintenance outages based on standard mechanical scopes, without any efforts on performance optimization.
Recommended Services:
- Initial Detailed Performance
Assessment – Total Plant. - Outage Performance Optimizer.
Resolution
Audits & Testing
- Pre-mobilization historian data review.
- Transmitter checks on GT, ST and HRSG.
- IGV measurement & verification.
- GT and WSC isolation audit.
- GT & ST control constant check.
- Condenser audit.
- Off-line WW audit.
- Baseload data collection.
Analysis
- GT characterization: airflow, compr. efficiency, turb. efficiency, ISO Tfire.
- ST characterization: Swallowing Capacities, P-ratio and section efficiency analysis.
- HRSG characterization: flows & temperatures, full controls validation, section-by-section analysis.
- Condenser characterization:
cleanliness factor calculation.
Findings
+0.5%
CC EFFICIENCY
recoverable from GT leaks
improved WW process.
+0.4%
CC POWER & EFFICIENCY
recoverable from HRSG leaks.
+0.3%
CC PLANT POWER & EFFICIENCY
recoverable from condenser
fouling.