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Gas Turbines M501F Series

  • Standalone Gas Turbine Output

    180 MW class

  • Combined Cycle Output

    280 MW class / 580 MW class

  • Fuel Diversification

    Compatible with blast furnace gas (BFG)

Gas turbines for 60 Hz power generation matched with diversification of fuels

In 1991, MHPS developed the M501F Series gas turbines for 60 Hz power generation. The following year, it developed the M701F Series for 50 Hz power generation as a series with similar design.

Since then, MHPS has continued to improve the design of F Series gas turbines. While introducing advanced elemental technologies and material technologies verified with the G Series with a proven track record, the F Series attains continuous performance enhancement.

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

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

Combustor

A premixing low NOx combustor is composed of one pilot burner and eight main burners that surround it. The compressor has an air bypass mechanism that enables fuel-air ratio regulation in the combustion region.

Turbine

Rotating blades at the first two stages are free-standing, while those at the third and fourth stages are integral shroud blades.

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

Configuration

  M501F
Compressor Number of Stages 16
Combustor Number of Cans 16
Cooling Method Air Cooled
Turbine Number of Stages 4
Rotor Number of Rotors 1
Output Shaft Cold End
Rated Speed 3,600 rpm
Gas Turbine Approx. L × W × H 11.6 × 5.2 × 4.9 m
Approx. Weight 225 ton

Simple Cycle Performance

  M501F
Frequency 60 Hz
ISO Base Rating 185.4 MW
Efficiency 37.0 %LHV
LHV Heat Rate 9,740 kJ/kWh
9,230 Btu/kWh
Exhaust Flow 468 kg/s
1,032 lb/s
Exhaust Temperature 613 °C
1,136 °F
Exhaust Emission NOx 25 ppm@15%O2
CO 10 ppm@15%O2
Turn Down Load 75 %
Ramp Rate 12 MW/min
Starting Time 30 minutes

Combined Cycle Performance

  M501F
1 on 1 Plant Output 285.1 MW
Plant Efficiency 57.1 %LHV
2 on 1 Plant Output 572.2 MW
Plant Efficiency 57.3 %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

  1. Gas Turbines
  2. Steam Turbines
  3. Generators
  4. Inlet Air Filter
  5. Heat Recovery Steam Generator (HRSG)
  6. Electrical / Control Package
  7. Main Transformer
  8. Condenser

Typical Plant Layout - 2 on 1 configuration

  1. Gas Turbines
  2. GT Generator
  3. Steam Turbines
  4. ST Generator
  5. Inlet Air Filter
  6. Heat Recovery Steam Generator (HRSG)
  7. Electrical / Control Package
  8. GT Main Transformer
  9. ST Main Transformer
  10. Condenser

Main Delivery Records

Himeji No. 1 Power Station Unit 5, The Kansai Electric Power Co., Inc. (Japan) (Photo courtesy of The Kansai Electric Power Co, Inc.)
729 MW, 3 x M501F
Kawagoe Thermal Power Station Group 4, Chubu Electric Power Co., Inc. (Japan)
1,701 MW, 7 x M501F
Mizushima Power Station Unit 1, The Chugoku Electric Power Co., Inc. (Japan)
285 MW, 1 x M501F
Sakaide Thermal Power Station Unit 1, Shikoku Electric Power Co., Inc. (Japan)
283.1 MW, 1 x M501F

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