M701J Series
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Standalone Gas Turbine Output
440-570 MW class
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Combined Cycle Output
650-840 MW class
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Combined Cycle Efficiency
More than 64%
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High Reliability Verified
Cumulative total number of hours of operation as commercial unit:More than 1,000,000 hours
Cutting-edge high-capacity gas turbines for 50 Hz power generation
incorporating state-of-the-art technologies
The J Series gas turbines are an integration of the proven G Series and elemental technologies for temperature increase as a result of the Japanese national project for development of 1,700°C class gas turbines. They operate at a turbine inlet temperature of 1,600°C.
Developed as a model with a similar design, the M701J Series for 50 Hz power generation began commercial operation at the beginning of 2016. The M701JAC Series gas turbines adopt air cooling for combustors instead of steam cooling. With performance equivalent to the M701J Series gas turbines, they produce a high level of operability including a shorter start-up time.
Overall Design
The gas turbine unit is based on the basic structure adopted in the early 1970s that has accumulated a track record of at least 40 years. Its main features are as follows:
- A compressor shaft end drive reduces the effect of thermal expansion on alignment
- A rotor with simple single-shaft two-bearing support
- A rotor structure has bolt-connected discs with the torque pins in the compressor section and CURVIC couplings in the turbine section to ensure stable torque transmission
- An axial flow exhaust structure advantageous in combined cycle plant layouts
- Horizontally split casings that facilitate field removal of the blades with the rotor in place
Compressor
Advanced three-dimensional design techniques are used to improve performance while reducing the shockwave loss in the initial stages and frictional loss in the intermediate and final stages. The inlet guide vanes and variable stationary vanes at the first three stages are controlled to ensure stable operation at the start-up and enhanced performance at partial load in combined cycle operation.
Combustor
The J Series combustor is based on the steam cooling system proven with the G Series. An improved fuel nozzle is used to help produce a more homogeneous mixture of fuel and air. Despite the rise in turbine inlet temperature, the combustor attains NOx emission concentration equivalent to that of the G Series.
Incorporating air-cooled combustors, the JAC series adds operational flexibility by eliminating any need for steam cooling from the bottoming cycle.
Turbine
The turbine inlet temperature is 100°C higher than that of the G Series. However, the application of high performance cooling technologies developed in a Japanese national project for the development of 1,700°C class gas turbines and advanced thermal barrier coating (TBC) helps to maintain the metal temperature of the turbine blades at the level of conventional gas turbines.
Configuration
M701J | M701JAC | ||
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Compressor | Number of Stages | 15 | 15 |
Combustor | Number of Cans | 22 | 22 |
Cooling Method | Steam Cooled | Air Cooled | |
Turbine | Number of Stages | 4 | 4 |
Rotor | Number of Rotors | 1 | 1 |
Output Shaft | Cold End | Cold End | |
Rated Speed | 3,000 rpm | 3,000 rpm | |
Gas Turbine | Approx. L × W × H | 16.7 × 6.5 × 6.9 m | 16.7 × 6.5 × 6.9 m |
Approx. Weight | 550 ton | 550 ton |
Simple Cycle Performance
M701J | M701JAC(2015) | M701JAC(2018) | ||
---|---|---|---|---|
Frequency | 50 Hz | 50 Hz | 50 Hz | |
ISO Base Rating | 478 MW | 574 MW | 448 MW | |
Efficiency | 42.3 %LHV | 43.4 %LHV | 44.0 %LHV | |
LHV Heat Rate | 8,511 kJ/kWh | 8,295 kJ/kWh | 8,182 kJ/kWh | |
8,067 Btu/kWh | 7,826 Btu/kWh | 7,755 Btu/kWh | ||
Exhaust Flow | 896 kg/s | 1,024 kg/s | 765 kg/s | |
1,977 lb/s | 2,181 lb/s | 1,687 lb/s | ||
Exhaust Temperature | 630 °C | 646 °C | 663 °C | |
1,166 °F | 1,201 °F | 1,226 °F | ||
Exhaust Emission | NOx | 25 ppm@15%O2 | 25 ppm@15%O2 | 25 ppm@15%O2 |
CO | 9 ppm@15%O2 | 9 ppm@15%O2 | 9 ppm@15%O2 | |
Turn Down Load | 50 % | 50 % | 50 % | |
Ramp Rate | 58 MW/min | 66 MW/min | 53 MW/min | |
Starting Time | 30 minutes | 30 minutes | 30 minutes |
Combined Cycle Performance
M701J | M701JAC(2015) | M701JAC(2018) | ||
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1 on 1 | Plant Output | 701 MW | 840 MW | 650 MW |
Plant Efficiency | 62.3 %LHV | >64.0 %LHV | >64.0 %LHV | |
2 on 1 | Plant Output | ‐ | ‐ | ‐ |
Plant Efficiency | ‐ | ‐ | ‐ | |
Starting Time | ‐ | ‐ | ‐ |
Performance Correction Curves
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Effects of Compressor Inlet Temperature on Gas Turbine Performance (Typical)
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Effects of Barometric Pressure on Gas Turbine Performance (Typical)
Typical Plant Layout - 1 on 1 configuration, single-shaft
- Gas Turbines
- Steam Turbines
- Generators
- Inlet Air Filter
- Heat Recovery Steam Generator (HRSG)
- Electrical / Control Package
- Main Transformer
- Condenser
Typical Plant Layout - 2 on 1 configuration
- Gas Turbines
- GT Generator
- Steam Turbines
- ST Generator
- Inlet Air Filter
- Heat Recovery Steam Generator (HRSG)
- Electrical / Control Package
- GT Main Transformer
- ST Main Transformer
- Condenser
Main Delivery Records
Recent Orders
Number of units x Series | Year of start of operation | Plant specifications | |
---|---|---|---|
Kawasaki Thermal Power Station Unit 2, TEPCO Fuel & Power, Inc. (Japan) | 2 × M701J | 2016 | Combined cycle |
Products
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Technical Information
- Gas Turbines for Mechanical Drive Applications
- Cutting-Edge Elemental Technology Producing 1600°C Class J Gas Turbines
- Development of High-Efficiency Gas Turbine Applying 1600°C Class J Technology
- Combustor Technologies Supporting Stable Operation
- Overview and Verification Status of T-Point 2 Demonstration Facility
- Comprehensive Efforts from Development to Manufacturing
- Summary of Orders
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DIASYS Optional Products
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