The blades which were installed  in SGT-400 gas turbines were made out  of high performing Nickel Superalloys as follow:

Turbines Stage               Nozzles                    Blades                     Wheels or Discs

         1                          INCO 738 LC           MAR M247                      INCO 718

         2                          INCO 738 LC           INCO 738 LC                    INCO 718

Engine Core

• Engine core 12.9 MW(e) rating at ISO.
• Compressor assembly with variable guide vanes.
• Dry Low Emissions (DLE) combustion system designed for dual fuel operation.
• Capability to burn liquid fuel, 2.2% CO2 fuel and 1.7% CO2 fuel (with burner change out).

Exhaust Collector

• Exhaust outlet casing phased vertically.
• Exhaust outlet flexible joint.

Instrumentation

• Air inlet casing temperature thermocouples.
• Turbine compressor discharge temperature thermocouples.
• Turbine compressor discharge pressure transmitters.
• Low pressure turbine exhaust outlet temperature thermocouples.
• Engine bearing temperature monitoring.
• Rotor speed probe.
• Non-contacting turbine bearing vibration probes.
• Key phasor.

Underbase

• Separate underbases to carry the gas turbine, auxiliary gearbox and gearbox and generator  fabricated steel construction.
• Integral lube oil tank constructed from carbon steel.

Lube Oil System

• Integral lube oil system serving the gas turbine, gearbox and generator.
• Main lube oil pump, gearbox driven.
• Auxiliary lube oil pump and AC motor.
• Emergency lube oil pump and explosion proof DC motor.
• On-skid lube oil piping, stainless steel.
• Lube oil pressure transmitter and switch.
• Lube oil supply temperature thermocouple and transmitter.
• Lube oil tank temperature thermocouple.
• Lube oil tank low level switch and annunciation.
• Two (2) lube oil tank immersion heaters.
• Duplex type 10 micron lube oil filter, fitted with differential pressure transmitter.

Lube Oil Breather System

• Low pressure oil mist eliminator constructed of carbon steel.
• Supply and return pipe work to turbine package Siemens Energy, Inc.                                                               

Oil Cooler

• 1 x 100% air blast lubrication oil cooler suitable for an ambient air temperature up to 104°F (40°C).
• Non-return valves for lube oil cooler piping supplied loose for fitting by others.

Engine Auxiliaries

• Turbine compressor cleaning system for on-line and off-line water washing.
• Aluminum instrument bodies.
• Instrument tagging per Siemens standards.
• Identification and warning labels in English and Spanish.
• Stenciled skid edge service connection identification, to Siemens format.

Paint Finish

• Standard Siemens on-shore paint finish.

Start System

• AC electric motor driven hydraulic starting system.

Dual Fuel System

• Modular Liquid fuel and Gas fuel system.
• Automatic changeover capability.

DLE Gas Fuel System

• On-skid gas fuel piping in stainless steel.
• Two rapid-acting gas shut-off valves.
• Independent control of main and pilot gas fuel valves.

DLE Liquid Fuel System

• Liquid fuel pump, AC motor driven.
• Duplex type, 10 micron, liquid fuel filter complete with differential pressure transmitter.
• On-skid fuel piping in stainless steel downstream of filter.
• Shut-off valves.
• Liquid fuel grounding.
• Independent control of primary, secondary and tertiary liquid fuel flows.
• Off-skid shut-off and thermal relief valves (Supplied loose for customer’s liquid fuel off-
• skid piping).
• Liquid fuel startup assist design supplied for improved reliability.

Liquid Fuel Conditioning skid

• Liquid fuel conditioning system contained on a Painted carbon steel skid.
• Duplex Liquid fuel filter.
• Liquid fuel pump.
• Instrumentation for pressure and temperature monitoring Siemens Energy, Inc.

Air Intake System

• Three stage combustion air intake filter, fabricated of 316 SS.
• SS Weather hood/Vane Separator, Prefilter and HEPA filter.
• Combustion air intake silencer, fabricated of stainless steel, designed for overall sound attenuation to 85dB(A) SPL at 3ft (1m) with distance measured at 5ft (1.5m) above grade.
• Expansion joint.
• Transition duct.
• 90° elbow.

Exhaust System

• Exhaust diffuser fabricated in stainless steel.
• Exhaust flex.
• Secondary diffuser fabricated in stainless steel.
• Exhaust Silencer fabricated in painted carbon steel with stainless steel internals, designed for an overall sound attenuation of 85 dB (A) SPL at 3ft (1m) 5ft (1.5m) above grade.
• Exhaust ducting fabricated in stainless steel to a stack 15m above grade

Acoustic Enclosure

• Enclosure fitted over the turbine bolted to the underbase, for average sound attenuation to 85dB(A) SPL at 3ft (1m) with distance measured at 5ft (1.5m) above grade.
• Enclosure over the gearbox and generator bolted to the underbase, for average sound attenuation to 85dB(A) SPL at 3ft (1m) with distance measured at 5ft (1.5m) above grade.
• Internal lighting is provided.
• Painted carbon steel construction with 316SS internals.
• Doors and removable side panels for personnel/maintenance access.

Ventilation System

• Ventilation inlet and outlet dampers.
• Inertial filter.
• Ventilation inlet and outlet silencers fabricated of carbon steel, designed for an overall noise level of 85dB (A) SPL at 3ft (1m) with distance measured at 5ft (1.5m) above grade.
• 2 x 100% AC electric motor driven ventilation fans operating in parallel designed for Class 1.
• Division 2 Group D area classification, and up to a maximum ambient temperature of 104°F (40°C).

Fire and Gas System

Three (3) Triple IR flame detectors. Two (2) thermal detectors.

Two (2) gas detectors.

Four (4) CO2 cylinders, located off main skid in a weatherproof enclosure, twin-shot fire protection system.

Audible and visible alarms for extinguish and release. Suitable for Class 1 Division 2 Group D area classification.

Provision for weighing the CO2 bottles to monitor charge Siemens Energy, Inc.

Gearbox & Couplings:

Auxiliary Gearbox

• Auxiliary gearbox incorporating input shaft for start system and output drive for mechanically driven lube oil pump.

Speed Reducing Gearbox

• Parallel shaft speed reducing gearbox with an output shaft speed of 1800 rpm.
• Accelerometer vibration probe mounted on the gearbox casing.
• Designed for 12.9 MW(e) rated core.

Output Coupling

• Coupling between gas turbine and gearbox.
• Coupling with torque-limiting device between gearbox and generator.

Coupling Guard

• Coupling guard fabricated of Aluminum between gas turbine and gearbox.
• Coupling guard fabricated of Aluminum between generator and gearbox.

AC Generator and Electrical Equipment

• An 1800 rpm, 4.16 kV, 3 phase, 4 wire, 4 pole, 60 Hz, 0.8 power factor, salient pole brushless AC generator suitable for a safe area.
• Open Drip Proof (ODP).
• Generator bearing temperature detectors.
• Class ’F’ insulation with class ’B’ temperature rise.
• Outlet and junction boxes.
• Line side Cubicle including 3 surge capacitors, and 3 lightening arrestors.
• Neutral Cubicle including 11CT’s (3 for Metering, 3 for Differential Protection, 3 for Generator Protection, 1 for CCCT, and 1 for NGR).

Electrical Accessories

• All on-package electric devices meet or exceed Class 1 Division 2 Group D classification.
• All on-package control cabling.
• Junction boxes located on external surfaces of gas turbine generator.
• Aluminum cable trays.
• Integral grounding protection.
• Emergency ’stop’ push-button on turbine enclosure.

Battery Cabinet

• Fabricated of painted carbon steel.
• Suitable for locating in safe area.

Lead Acid Batteries

• 120 VDC Lead Acid batteries, charger and inverter for 24V DC Supply mounted in the battery rack Siemens Energy, Inc.