M701D Series

Large Capacity Gas Turbine - For 50Hz

Gas turbines for 50Hz power generation matched with diversification of fuels

CATALOGUE: GTCC Power Plants

Features

Standalone Gas Turbine Output: 140MW class

Combined Cycle Output: 210MW/430MW/650MW class

Compatible with a wide range of fuels, including blast furnace gas (BFG).
Proven design based on over 50 years of experience

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

Key Component Technologies

Compressor

The DA Series incorporates a high efficiency compressor with a proven track record. Stationary vanes at backward stages are supported by blade rings to minimize the tip clearance of rotating blades.

Variable inlet guide vanes ensure operational stability at the start-up and enhanced performance at partial load in combined cycle operation.

Combustor

Mitsubishi Power introduced the world' s first commercial dry low NOx combustors to the D Series gas turbines in 1984. A premixing low NOx combustor is composed of one pilot burner and eight main burners that surround it. The combustor has an air bypass mechanism that enables fuel-air ratio regulation in the combustion region.

Turbine

In response to the increase in the turbine inlet temperature, stationary vanes at the first three stages and rotating blade at the first two stages are air-cooled. The rotating blade at the fourth stage is equipped with a Z-shaped shroud to enhance the vibration resistance strength of the blades.

Stationary vanes are supported by blade rings that are independent at individual stages to prevent the turbine casings from being affected by thermal expansion.

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Combustor Technologies Supporting Stable Operation

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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Configuration

		M701DA
Compressor	Number of Stages	19
Combustor	Number of Cans	18
Combustor	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	11.9 × 5.0 × 5.3 m
Gas Turbine	Approx. Weight	240 ton

Simple Cycle Performance

		M701DA
Frequency		50 Hz
ISO Base Rating		144.09 MW
Efficiency		34.8 %LHV
LHV Heat Rate		10,350 kJ/kWh
LHV Heat Rate		9,810 Btu/kWh
Exhaust Flow		453 kg/s
Exhaust Flow		999 lb/s
Exhaust Temperature		542 °C
Exhaust Temperature		1,008 °F
Exhaust Emission	NOx	25 ppm@15%O₂
Exhaust Emission	CO	30 ppm@15%O₂
Turn Down Load		75 %
Ramp Rate		9 MW/min
Starting Time		30 minutes

Combined Cycle Performance

		M701DA
1 on 1	Plant Output	212.5 MW
1 on 1	Plant Efficiency	51.4 %LHV
2 on 1	Plant Output	426.6 MW
2 on 1	Plant Efficiency	51.6 %LHV
Starting Time		70 minutes

Performance Correction Curves

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

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

Representative Example

Tohoku Electric Power Co., Inc.

Country/Region	Japan
Plant	Higashi-Niigata Thermal Power Station Unit 3
Plant specifications × Qty	Combined cycle×6
Year of operation	1984 started

JFE Steel Corporation

Country/Region	Japan
Plant	East Japan Works
Plant specifications × Qty	Combined cycle×1
Year of operation	1987 started

Other Delivery Records

Client / Plant	Country/Region	Year of starting operation	Plant specifications × Qty
The Hongkong Electric Co., Ltd. (HEC) / Lamma OCGT	Hong Kong	2025	Simple cycle × 3
Turkmenenergo / Zerger Gas-Fired Power Plant	Turkmenistan	2019	Simple cycle × 3
Shougang Jingtang United Iron & Steel Co., Ltd. / Caofeidian Plant	China	2018	Blast furnace gas-fired combined cycle × 1