STG I and STG II steam back-pressure turbines (up to 7 MW)



Main advantages and parameters of STG I and STG II turbines

  • higher efficiency compared with standard single wheel turbines
  • utilization of higher pressure drop

Inlet steam

  • pressure: max. 65 bar abs.
  • temperature: max. 535 °C
  • flow rate: max. 60 t/h

Outlet steam

  • pressure: 1,2 bar abs. to 25 bar abs.

Shaft power

  • 100 kW to 8 MW

Use

  • for driving generators and electric energy generation
  • for driving compressors, feed pumps, fans and other machines


The STG I and STG II back-pressure steam turbine is one of the core products manufactured by PBS ENERGO and resulting from more than 30 years of development.

They have one or two turbine modules with high-speed shafts, on which overhanging end there is always one turbine wheel of the radial or axial turbine stage installed. The low-speed shaft of the gearbox with the usual speed of 3000 rpm or 1500 rpm is connected with the rotor of the power generator or other driven machine.

STG I steam turbines have one turbine module integrated with a high-speed transmission with spur gears, which contains one high-speed shaft with a speed of up to 28000 rpm.

STG II steam turbines have two turbine modules integrated with a high-speed transmission with spur gears, which contains two high-speed shafts with a speed of up to 28000 rpm.

The main advantage of the STG I and STG II turbo-sets is a higher efficiency in comparison with standard one-wheel turbines thanks to the use of high speed and a wide range of turbine stages of various types, which are always customized to reach a maximum efficiency of the turbine.

The STG II steam back-pressure turbines can be used for driving a generator and generating power as well as for driving feed pumps, compressors, fans or similar equipment.

Depending on the range of the controlled steam parameters, the STG I and STG II steam back-pressure turbines can be equipped with swivelling guide blades of the stator. The swivelling control increases overall efficiency of the steam turbo-set substantially in the non-design modes of the turbine run.

The STG II steam back-pressure turbines enable using controlled or non-controlled steam extraction from the transfer piping connecting the high-pressure and low-pressure modules on the steam side. The extraction pressure can be controlled in a wide range of flow by means of the swivelling guide blades of the low-pressure module.

Financing

Last but not least, PBS ENERGO offers its customers various models of financing. In cooperation with financial institutions we are ready to offer our customers an optimal financing model for the construction of the plant itself as well as for the medium-term or long-term crediting.

Selected references

PEC Jelenia Gora
Koramo Kolín
SYNTHOS Kralupy, a.s.
ŽDB
Heating plant Maloměřice
Heating plant Holešovice, Prague
Heating plant Klatovy