ENN EGT80:
GAS TURBINE GENERATOR SET

EGT80
Gas Turbine Generator Set

1. General Technical Specification

Gas Turbine

  • Cycle type: simple cycle
  • Power-generation type, single shaft
  • 14-stage axial compressor
  • 3-stage axial turbine
  • Combustor: 12 low-emission combustors
  • NOx emissions: <=25 ppm (50 mg/m3)
  • Single torch igniter system

Bearings

  • One set of tilting-pad thrust bearings (active)
  • One set of fixed tapered-land thrust bearings (inactive)
  • Three sets of tilting-pad radial journal bearings

Vibration Detection

  • Eddy-current vibration sensors
  • Two sensors per radial bearing and two sensors per thrust bearing

Reduction Gearbox

  • Planetary type
  • Output speed: 1,500 rpm or 1,800 rpm (50 Hz or 60 Hz)
  • Reduction ratio: 10.095 or 8.413
  • Drives the main lubricating-oil pump

Generator

  • 4-pole, 3-phase, 6-wire, wye-connected synchronous generator with permanent-magnet generator exciter
  • Rated voltage: multiple options available
  • Output frequency: 50 Hz or 60 Hz

2. Packaged Unit

Acoustic Enclosure

  • Noise level: 85 dB(A), measured 1 m from the acoustic enclosure
  • Gas-leak detection and alarm; fire detection
  • Optional CO2 fire-suppression system
  • Active enclosure ventilation fan
  • Exhaust silencer
  • Carbon-steel base with vibration-isolation pads

Lubrication System

  • Oil pumps: one turbine-driven main lubricating-oil pump, one AC auxiliary lubricating-oil pump, and one DC emergency lubricating-oil pump
  • Lubricating oil: VG32, compliant with ISO 3448
  • Electric oil-tank heater
  • Water-cooled oil heat exchanger
  • Duplex filter
  • Negative-pressure fan and oil-mist separation device

Intake and Exhaust System

  • Air-inlet filtration: G4 coarse filter and F9 fine filter
  • Air-inlet filter differential-pressure / pressure-loss monitoring
  • Exhaust arrangement: axial exhaust

Starting System

  • Direct-drive AC starting motor with variable-frequency drive (VFD) control

Control System

  • PLC control
  • Human-machine interface: touchscreen and physical pushbuttons
  • Real-time operating data and alarm display
  • Start, stop, and emergency-stop buttons
  • Centralized control from the control room

Fuel System

  • Fuel control: flow-control valve
  • Standard fuel: natural gas
  • Customizable fuels: diesel, biomass gas, coke-oven gas, biogas/methane, coal-bed methane, oilfield associated gas, kerosene, etc.

3. Main Performance Parameters

ParameterValueParameterValue
Power output7,537 kWElectrical efficiency33.56%
Exhaust gas temperature507 °CExhaust gas flow26.61 kg/s
Natural gas consumption2,378 Nm³/hHeat rate10,727 kJ/kWh

4. Dimensions and Weight

ItemSpecification
Gas turbine skid dimensions10.8 × 2.8 × 3.7 m (reference; inlet filtration system not included)
Maintenance clearanceLeft side: 3 m; Right side: 3 m; Front: 4.3 m
Weight63 t

5. Combined Heat and Power (CHP) Application

CHP OutputRated Value
Steam production                     14.9 t/h                     
Hot-water production229.1 t/h
Drying heat11,220 kW

6. Notes and Rating Basis

[1] Rated-state parameters are based on standard conditions of 15 °C, 101.325 kPa, and 60% relative humidity. Fuel performance is based on natural gas with a lower heating value (LHV) of 34 MJ/Nm³.
[2] When looking from the gas turbine toward the exhaust end, the left-hand side is defined as the left side of the unit and the right-hand side as the right side.
[3] Steam production is based on steam pressure of 0.8 MPa(g) and steam temperature of 175 °C.
[4] Hot-water production is based on an inlet-water temperature of 15 °C, outlet-water temperature of 60 °C, and exhaust-gas outlet temperature of 75 °C.
[5] Drying heat is based on available exhaust-gas heat above 120 °C.

7. Performance Variation with Inlet Air Temperature

The source specification includes curves showing how unit power output and heat rate vary with inlet-air temperature. The curves are retained conceptually as part of the technical specification; numerical curve points are not separately tabulated in the source document.