Hanwha Power’s GTOP packages combine hot gas path component upgrades, compressor aerodynamic improvements, and combustion system enhancements into a coordinated performance solution for GE7F, GE 7B/EA, and Siemens/MHI 501F gas turbines. GTOP supports three operating modes: Maintenance Mode for extended inspection intervals (up to 32,000+hours), Performance Mode for increased output (up to 7%) and improved heat rate(up to 3%), and Peak Mode for maximum output. Operators can switch between modes using Hanwha Power’s FlexSuite counters, adapting to seasonal demand, market conditions, or operational priorities. GTOP is compatible with multiple combustion systems, including Hanwha Power’s FlameSheet.
Operational Flexibility
Unlock higher performance or extended maintenance intervals, without compromising reliability.With GTOP, operators can choose between Maintenance Mode and Performance Mode, allowing you to adapt based on operational or seasonal demands:
- Maintenance Mode: Extend hot gas path inspection intervals up to 32,000 or even 40,000 hours.
- Performance Mode: Increase power output (up to 7%) and heat rate (up to 3%).
- Peak Mode: Maximum output for short-duration dispatch, available with upgraded hardware options.
- AutoTune Compatibility: Seamlessly switch between modes for optimal flexibility.
Optimized Combustion Parts
Hanwha Power’s DLN combustion systems have been upgraded for better emissions control and durability. New options offer NOx levels below 5ppm or 9ppm, depending on the selected system.
7B-EA Standard and Upgrade Options
Our structured GTOP packages include upgrades to combustion and hot gas path components, providing performance near or above OEM standards. Highlights include:
- Extended Component Life: Inspection intervals up to 32,000 hours in Maintenance Mode.
- FlexSuite™ Counters: Easily switch between maintenance and performance operation.
- High Firing Capability: Optional upgraded hardware for peak output.
- S1 and S2 Bucket Upgrades: From OEM to Hanwha Power’s advanced alloys for improved durability and creep resistance.
7F Upgrade Packages
GTOP3.0
Installed during a standard HGP outage, this package enhances efficiency and emissions performance:
- Redesigned transition piece and flow sleeves for reduced pressure drop
- Improved cooling features and thermal barrier coatings
- ≤9ppm NOx with Hanwha Power AutoTune
- Drop-in compatibility with standard 7F hardware
GTOP3.1
Builds on GTOP3.0 with aerodynamic upgrades to the R0, S0, and S1 compressor stages:
- Improved inlet flow for better efficiency
- Components designed with proven Hanwha Power mechanical integrity
- Optional upgraded 1st & 2nd stage buckets for durability
Shared Benefits of GTOP3.0 & 3.1
- Hot gas path inspection intervals extended to 32,000 hours
- Enhanced performance without sacrificing lifecycle
- Flexible operation mode switching
GTOP4.1
- GTOP 4.1 The latest evolution of Hanwha Power’s 7F upgrade package, GTOP 4.1 builds on the proven
- GTOP 3.1 platform with advanced cooling in the first turbine stages for improved component life and reduced lifecycle costs. Compatible with both 7F.03 and 7F.04 machines.
501F GTOP Offerings
Tailored packages for MHI and Siemens-based 501F units:
GTOP6
- R16 compressor blade with IGV control
- Robust 4th blade and ring segment
- Enhanced durability and reduced flow losses
GTOP7
- Modular vane design
- Advanced coatings and cooling for vanes and blades
GTOP8
- GTOP7-based solution optimized for MHI 501F turbines
The Ontelaunee 501F installation achieved 7% net plant output increase and 1.7% net plant heat rate improvement.
Want to learn more about upgrade options?
GTOP FAQs
GTOP (Gas Turbine Optimization Package) is Hanwha Power’scomprehensive upgrade solution that combines hot gas path componentimprovements with compressor aerodynamic upgrades and combustion systemenhancements. GTOP is available for GE 7F, GE 7B/EA, and Siemens/MHI 501F gasturbines. It supports three operating modes: Maintenance Mode (extendinginspection intervals to 32,000+ hours), Performance Mode (up to 7% output increaseand 3% heat rate improvement), and Peak Mode for maximum output.
GTOP packages are available for GE 7F (GTOP 3.0, 3.1, and4.1), GE 7B/EA (B/E-class GTOP), and Siemens/MHI 501F (GTOP 6, 7, and 8). Eachpackage is tailored to the specific frame with targeted component upgrades.GTOP is compatible with multiple combustion systems including Hanwha Power’sFlameSheet and OEM DLN systems.
GTOP 3.0 and 3.1 on standard GE 7F.03 engines extend hotgas path inspection intervals to 32,000+ hours while delivering measurableoutput and heat rate gains. In Performance Mode, operators can achieve up to 7%power output increase and up to 3% heat rate improvement. GTOP 3.1 addsaerodynamic upgrades to the R0, S0, and S1 compressor stages for improved inletflow and efficiency.
Yes. GTOP packages are designed for installation during astandard hot gas path inspection outage. The components are drop-in compatiblewith existing OEM hardware, and no major structural or control systemmodifications are required. Operators can also use Hanwha Power’s FlexSuitecounters to switch between Maintenance and Performance modes afterinstallation.
GTOP 3.0 focuses on the combustion and hot gas pathsections: redesigned transition pieces, improved flow sleeves, enhanced coolingfeatures, and thermal barrier coatings. GTOP 3.1 builds on 3.0 by addingaerodynamic upgrades to the R0, S0, and S1 compressor stages for improved inletflow and efficiency, plus optional upgraded 1st and 2nd stage buckets foradditional durability.
Related Technologies and Services
Complementary Technologies:
FlameSheet: Advanced Combustion System
AutoTune: Automated Combustion Tuning
