Model 9FA - Heavy Duty Gas Turbine
From Gas Turbines - Heavy Duty
The most experienced F-class 50 Hz product. First introduced in 1992, the 9FA heavy duty gas turbine is a popular choice for combined cycle, cogeneration, or simple cycle plants where flexible operation and high performance are prime considerations. Designed for 50 Hz applications, this advanced technology turbine delivers power with high efficiency, availability, reliability, and low emissions. The 9FA gas turbine provides the flexibility required today in many regions for power that can be rapidly adjusted to compensate for changes in renewable generation, demand or use. It provides the plant operator with choices to best meet fluctuating power demands.
Features & Benefits
- The Enhanced Compressor increases reliability and availability, and reduces periodic inspections and maintenance costs.
- Dry Low NOx (DLN) 2.6+ combustion system provides low NOx level emissions, increased emissions compliant turndown capability, and longer combustion inspection intervals.
- Blade Health Monitoring System provides real-time measurements of key static and dynamic deflection features to help determine blade deterioration.
- Cooling Optimization provides improved 9FA gas turbine power output and baseload efficiency through better management of turbine section clearances and cooling air flows.
- Fast Start reduces start time of the gas turbine across the entire start sequence. For simple cycle, this product option delivers a 15-minute start to full load. For combined cycle power plants, this production option reduces the start time of the power plant by as much as 20 min.
- Mark* VIe Control System controls the gas turbine using real-time physics based modeling, increasing the overall performance, operability, and reliability of the gas turbine. The control system can be expanded to provide a common platform for power station control.
Application/Industries Served
GE Energy's wide range of flexible power generation applications for the 9FA gas turbine include simple cycle, combined cycle, and cogeneration in both cyclic and baseload operation using a wide range of fuels.
- Combined Cycle applications are common in today's power plants. The gas turbine generator produces electricity and captures the waste heat to make steam to generate additional electricity via a steam turbine. Today, 95% of the 9FA gas turbine fleet is operating in combined cycle mode.
- Cogeneration is the production of electricity and useful thermal energy simultaneously from a common fuel source. The rejected heat from industrial processes can be used to power an electric generator. Surplus heat from an electric generator can be used for industrial processes or for heating purposes.
- Integrated Gasification Combined Cycle (IGCC) is the production of electricity from combined cycle gas turbine power plant operating on synthesis gas (syngas) derived from gasification of coal or other fossil fuels. In this case, the 9FA gas turbine is configured as a 9F syngas turbine with GE's Multi-Nozzle Quiet Combustor (MNQC) for operation on syngas or high hydrogen fuels, enabling carbon capture and sequestration (CCS) or use of CO2 for enhanced oil recovery (EOR).
- Integrated Water and Power Plant (IWPP) is the co-production of electricity and water in a single plant. Potable water is generated using the thermal energy in the gas turbine exhaust to drive desalination.
Regional Considerations
GE's 9FA gas turbine is a 50 Hz product that typically operates in a traditional market, such as Western Europe (England, Italy, Spain, etc.). Over the past few years, the customer base for the 9FA gas turbine has expanded to new markets in Eastern Europe (Latvia, Lithuania), North Africa (Algeria, Egypt), the Middle East, South America (Chile, Argentina), and China. GE has shipped more than 200 9FA gas turbines with 8.1 million fired hours since November 2010.
Design
The 9FA heavy duty gas turbine is aerodynamically scaled from 7FA gas turbine. It uses advanced aircraft engine technology in its design. Key advantages of the 9FA gas turbine include its fuel-flexible combustion system and high output performance.
- Dry Low NOx (DLN) 2.6+ combustor has five outer fuel nozzles with a single center fuel nozzle, which ensures a stable combustion across a wide range of operating conditions. The DLN 2.6 architecture also has an advanced fuel nozzle, called the swizzle, which combines the fuel injection gas ports into the swirler vanes all within the fuel nozzle body to provide a better mixed, more stable combustion zone. The DLN 2.6+ is able to maintain low NOx and CO emission levels while extending the load range available for operation.
- Eighteen-stage, axial flow compressor is designed with an ISO base pressure ratio of 17:1 and airflow of 203 kg/second. High strength, corrosion resistant stainless steel airfoil material is used on the first eight stages with the remaining airfoils made of steel alloy.
- Advanced controls - Model Based Control (MBC) - GE has developed industry leading, aviation-proven technology for advanced control of the gas turbine using detailed, thermodynamic models of the gas turbine and its sub-systems. By controlling the gas turbine using a real-time physics-based model, the overall performance, operability, and reliability of the gas turbine is increased. GE's MBC methodology has been used for several years on the 7FA gas turbine product and was introduced on the 9FA gas turbine in 2009.
Specifications
- Output (MW): 261 simple cycle, 791 combined cycle
- Baseload Efficiency (%): 37.3 simple cycle, 57.4 combined cycle
- Emissions: 25 ppm NOx and CO
- Emission Compliant Turndown (% Baseload): 45 simple cycle, 35 combined cycle
- Start Time (minutes/Hot Start): 15 simple cycle, 34 combined cycle
- Combustion Interval (hours/starts): 24k/450
- HGP Interval (hours/starts) - 24k/900
- Rotor Life (hours/starts): 144k/5000
On-site Capabilities
GE offers world-class project management services, such as project engineering, controls, global field operation, contract management, and sourcing. We are a leader in emission capabilities, providing our customers environmental permitting support. We also offer grid connectivity and compliance support from concept to project completion.
Financing solutions and support for the 9FA gas turbine are available from GE Capital Markets for all stages of the initial project phase-from acquisition to final negotiation. We also support regulatory advocacy.
Testing Capabilities
GE Energy's Quality Management System is designed to satisfy ISO9001:2000 requirements. In particular:
- Rotor balancing and full-speed no-load test of the 9FA gas turbine is usually performed in the factory before shipment.
- Test software is validated on the 9FA gas turbine control cubicles before shipment.
- Over speed test and full-load rejection tests are done at customer site.
- Performance, noise, and emission measurements are also performed in situ on the 9FA gas turbine.
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