Benefits
Increased profitability, improved O&M costs
Today’s combined-cycle plant operators are facing critical component wear and tear due to equipment age and increasing cyclic duty. As a result, plant output and efficiency are on the decline and unplanned emergent work is becoming more common. But with an ASP upgrade, you will experience better steam flow, improved O&M costs and reduced life consumption—which will help keep you online and profitable for years to come.
ASP benefits
- Reduced risk of unplanned outages and major emergent repairs during planned outages that are both costly and extend outage duration
- Increased steam turbine output based on recovery of aging losses and improved technology
- Enables combined-cycle plant upgrades that increase steam flow
- Improved combined-cycle heat rate
ASP features
What’s involved in an ASP upgrade?
An ASP upgrade includes:
- Singlet** diaphragms in the HP and IP sections
- Modern N2 packing head configuration made of 9-Cr material with reduced axial loading and improved clearances
- Enhanced sealing features including HP tip and root J-seals, N2 packing head brush seals, IP tip brush seals
- The new steam path is designed to fit within the existing shell
Consider your options
Is an ASP Lite upgrade better for me?
If you aren’t experiencing any bending, cracks or other major issues with your steam generator rotor, a partial steam path upgrade (ASP Lite) is a better option than replacing your entire rotor. The ASP Lite upgrade addresses multiple TILs with a solution that includes improved materials, blade profiles, and advanced sealing for improved thermal efficiency. The new steam path provides improved reliability, availability, thermal efficiency for increased MW output, and reduced plant heat rate.
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D10/D11 hardware repair and upgrade package summary
| Package 1 Component Repair |
Package 2 Advanced Steam Path "Lite" |
Package 3 Advanced Steam Path |
Package 4 Advanced Steam Path "Plus" |
|
|---|---|---|---|---|
| Package scope |
|
|
|
Package 3 plus:
|
| Customer benefits |
|
|
|
Package 3 plus:
|
| Address TILS | Short Term | Yes | Yes | Yes |
| Address rotor bow | Short Term | Good | Better | Best |
| ST MW output gain** (fleet average) |
None | To be confirmed (potentially Up to 0.9%) |
Up to 2.2% (1.2596) |
Up to 2.2% (1.25%) |
| CC HR improvement** (fleet average) |
None | To be confirmed (potentially Up to 0.3%) |
Up to 0.7% (0.495) |
Up to 0.7% (0.496) |
| Estimated outage days | 35-55 days | 25-30 days | <35 days | TBD |
| Operational flexibility | None | Minor tuning of HP/IP swallowing capacity | Enhancement of plant upgrades (GT, HRSG, etc.) | Package 3 Plus:
|
| Estimated delivery cycle | N/A | 40-45 weeks | 45-65 weeks (32 weeks for shell 2) |
65 weeks |
Customer stories
- East Coast, USA
- West Coast, USA
A huge ASP upgrade on the East Coast
538 MW
natural-gas-fueled combined cycle plant
70+%
of D-11 equipped fleet is monitored by GE M&D Center
A customer on the U.S. east coast was dealing with an aging plant, and asked GE to help modernize their D-11 steam turbine. GE diagnosed the issue as rotor bowing from extreme forced cooling and integrated its advanced steam path (ASP) upgrade to prevent cracks in the shell, further bowing, and new loss of steam.
Monitored, diagnosed, and upgraded: GE’s ASP solution
70+%
of D-11 equipped fleet is monitored by M&D Center in Atlanta
+3 MW
of capacity added with upgrade vs. maintenance
GE’s Monitoring & Diagnostics (M&D) Center can pick up early signs of instability in its D-11 fleets—like it did for a cogeneration customer on the west coast. When M&D saw vibrational interference from rotor bowing, its advanced steam path (ASP) upgrade was integrated. Now, singlet diaphragms and improved sealing help steam efficiency for this power plant.
** Trademark of General Electric Company
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