M501F Series

Gas Turbines
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  • 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, Mitsubishi Power 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, Mitsubishi Power 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.

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