M701J/JAC Series

Large Capacity Gas Turbine - For 50Hz
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Cutting-edge large-capacity gas turbines for 50 Hz power generation
incorporating state-of-the-art technologies

Features

Standalone Gas Turbine Output
448-574 MW class
Combined Cycle Output
650-840 MW class
Combined Cycle Efficiency
More than 64%
Total commercial operating hours
Over 3.2 million hours
  • J Series as of December 2025
  • World-class combined cycle efficiency of over 64%.
  • High reliability with cumulative commercial operation time exceeding 3.2 million hours.
  • 30% hydrogen co-firing has been demonstrated, supporting the transition to carbon neutrality.
  • Reduces CO₂ emissions by approximately 65% compared to conventional coal-fired power plants.
Featured Case Studies

Mitsubishi Power Lands Significant Gas Turbine Order for Qatar's Facility E IWPP Project

In 2026, Mitsubishi Power was awarded a contract to supply four state-of-the-art, hydrogen-ready M701JAC gas turbines for Qatar's Facility E power and desalination project. The project will add 2.4 GW of power and produce 495,000 tons of desalinated water per day.

Product Details

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 50 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
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Key Component Technologies

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.

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Long-term Validation - T-POINT 2 Proving Ground for Gas Turbine Advancements

Mitsubishi Power has a unique design and validation approach, unlike any other Original Equipment Manufacturer (OEM). The current verification process for the J-series technology takes place at our grid-connected T-Point 2 commercial combined cycle power plant located at Takasago Machinery Works 1 km2 campus 48 km west of Kobe, Japan. In one single location, we house the four key pillars of validation: research and development, design, manufacturing, and full-scale validation. These turbine designs undergo long-term operation of at least 8,000 hours of validation, equivalent to nearly one year of normal operation.

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Hydrogen Capability

With Mitsubishi Power's hydrogen combustion technology, power plant owners can convert existing gas turbine combined cycle (GTCC) plants to hydrogen co-firing, reducing CO₂ emissions. In the future, it will also be possible to switch to 100% hydrogen combustion with minimal modifications.

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Configuration

M701JAC
Compressor Number of Stages 15
Combustor Number of Cans 22
Cooling Method Air Cooled
Turbine Number of Stages 4
Rotor Number of Rotors 1
Output Shaft Cold End
Rated Speed 3,000 rpm
Gas Turbine Approx. L × W × H 16.7 × 6.5 × 6.9 m
Approx. Weight 550 ton

Simple Cycle Performance

M701JAC（2015） M701JAC（2018）
Frequency 50 Hz 50 Hz
ISO Base Rating 574 MW 448 MW
Efficiency 43.4 %LHV 44.0 %LHV
LHV Heat Rate 8,295 kJ/kWh 8,182 kJ/kWh
7,826 Btu/kWh 7,755 Btu/kWh
Exhaust Flow 1,024 kg/s 765 kg/s
2,181 lb/s 1,687 lb/s
Exhaust Temperature 646 °C 663 °C
1,201 °F 1,226 °F
Exhaust Emission NOx 25 ppm@15%O2 25 ppm@15%O2
CO 9 ppm@15%O2 9 ppm@15%O2
Turn Down Load 50 % 50 %
Ramp Rate 66 MW/min 53 MW/min
Starting Time 30 minutes 30 minutes

Combined Cycle Performance

M701JAC（2015） M701JAC（2018）
1 on 1 Plant Output 840 MW 650 MW
Plant Efficiency ＞64.0 %LHV ＞64.0 %LHV

Performance Correction Curves

Effects of Compressor Inlet Temperature on Gas Turbine Performance (Typical)

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Effects of Barometric Pressure on Gas Turbine Performance (Typical)

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Typical Plant Layout - 1 on 1 configuration, single-shaft

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  • 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

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  • 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

Representative Example

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TEPCO Fuel & Power, Inc.

Country/Region Japan
Plant Kawasaki Thermal Power Station Units 2
Plant specifications × Qty Combined cycle × 2
Year of operation 2016 started

Hin Kong Power Company Limited

Country/Region Japan
Plant Hin Kong Power Plant
Plant specifications × Qty Combined cycle × 2
Year of operation 2025 started

Gulf PD Company Limited

Country/Region Thailand
Plant Gulf Pluak Daeng Power Plant
Plant specifications × Qty Combined cycle × 4
Year of operation 2021 started

Other Delivery Records

Client / Plant Country/Region Year of starting operation Plant specifications × Qty
Sichuan Energy Investment (Zhongjiang Project) / Deyang Zhongjiang Gas Fired Power Plant China 2025 Combined cycle × 2
Sichuan Provincial Investment (Luzhou Project) / Luzhou Gas Fired Power Plant China 2025 Combined cycle × 2
Aluminium Bahrain B.S.C / Power Station 5 Block4 Combined Cycle Gas Turbine Power Bahrain 2024 Combined cycle × 1
JERA Power Anesaki G.K. / Anegasaki Thermal Power Station New Unit 1,2 Japan 2023 Combined cycle × 3
Tohoku Electric Power Co., Inc. / Joetsu Thermal Power Station Unit No. 1 Japan 2022 Combined cycle × 1
Gulf SRC Company Limited / Gulf Sriracha Power Plant Thailand 2021-2022 Combined cycle ×4

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