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GE 6FA CCGT Power Plant – GT Exhaust Expansion Joint in England
Creating a hot casing frame connection for the inlet, whilst maintaining the cold casing outlet frame, utilised the best arrangement for a high cycling available solution, whilst giving making the optimum transition and integration for the exhaust duct.
The Derwent cogeneration power plant consists of four GE Frame 6 MS6001B gas turbines connected to auxiliary fired Nooter Eriksen heat recovery steam generator (HRSG) boilers. There is also a 59 MWe steam turbine and surface condenser. It produces 50 MW for the National Grid, providing electricity for 180,000 homes in the surrounding area.
| Total Output: |
214 MW |
| Date Operational: | 1995 |
| Location: | Derbyshire, England |
| Primary Fuel: | Natural Gas |
Original: Base Load Expansion Joint
The original frame design was insufficient for long-term base loads or short-term cycling. This low quality installation led to the inevitable breakdown of the expansion joint and adjacent structures.
Regular problems caused by this design:
- Overheating inlet flange.
- Overheating cold casing on the outlet flange.
- Continual weld repairs required.
Solution: DEKOMTE Fabric Expansion Joint
DEKOMTE Fabric Expansion Joints offer greater flexibility whilst maintaining longevity and reliability. With the joint delivered complete with internal insulation, the installation process was quick and efficient, keeping the outage duration to a minimum.
Creating a hot casing frame connection for the inlet, whilst maintaining the cold casing outlet frame, utilised the best arrangement for a high cycling available solution, whilst giving making the optimum transition and integration for the exhaust duct. DEKOMTE fabric and steel frame design is much better suited to the varying starts, while remaining gas tight and cost-effective.
| Dimensions: |
3624mm x 1980mm |
| Operating Temperature: | 566˚C |
| Static Pressure: | 50 mbar |
| Movement: | Axial: +/- 6mm Lateral: +/- 19mm |
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