HOWDEN SERIES TWIN-CA 56 STEAM TURBINE AND AC GENERATOR (7.0MW) MFG 2018

Howden 7MW TWIN Condensing Steam Turbine with A.C. Generator MFG 2018 • OEM: Siemens Turbomachinery Equipment Series SST-110 • Unit type: Twin-CA 56 • Power output: 7.0MW • Main Steam Temp: 445°C • Operates on 900°F superheated steam at 800psi. • Provides plant process steam at 375°F at 46psi RO make-up water treatment system • Sole source of Plant processing power via gas fired boiler Power output at coupling Normal 6155 kW Maximum 5500 kW Terminal output Normal kWe Maximum kWe Output speed Minimum --- rpm Normal 1800 rpm Maximum --- rpm Trip speed Normal 1962 rpm Gear ratio 8.48 Main steam pressure Minimum (limit) 49.4 bar Minimum (operation) --- bar Normal (operation) 54.6 bar Maximum (operation) 59.1 bar 51 Maximum (limit) 59.6 bar Maximum (safety valve) 59.6 bar Main steam temperature Minimum (limit) 425 °C Minimum (operation) --- °C Normal (operation) 471 °C Maximum (operation) --- °C Maximum (limit) 486 °C Intermediate pressure Minimum (limit) 2.2 bar Minimum (operation) --- bar Normal (operation) 3.2 bar Maximum (operation) 3.95 bar Maximum (limit) 4.2 bar Maximum (safety valve) 4.2 bar Intermediate temperature Maximum (limit) 388 °C Intermediate temperature (uncoupled, short-term) Maximum (limit) 471 °C Leakoff steam pressure Maximum 2 bar Discharge leakoff steam to low-pressure system or atmosphere Differential pressure Δ p4 at impeller Alarm bar Shutdown of bar See installation drawing for direction of rotation Sound pressure level (turbine) dB (A) Sound power level (turbine) dB (A) Gear ratio 6.29 Exhaust steam pressure Minimum (limit) -0.848 bar Minimum (operation) --- bar Normal (operation) -0.828 bar Maximum (operation) 0.2 bar Maximum (limit) 0.5 bar Maximum (safety valve) 2 bar Exhaust steam temperature Maximum (limit) 350 °C Differential pressure Δ p4 at impeller Alarm 0.35 bar Shutdown of 0.4 bar Sound pressure level (turbine) 86.1 dB (A) Sound power level (turbine) 101.1 dB (A) Includes A.C. GENERATOR This generator is a Brush less AC generator with an AC exciter and rotating rectifier mounted on a common shaft. The specification of the generator is as follows: AC GENERATOR DETAILS 1. Type Cylindrical Rotor type 2. Conforming standards. NEMA MG-1 3. Type of excitation system Brushless 4. Continuous rated output kW / kVA 7000 / 8750 5. Speed in (rpm) 1800 6. Voltage (Volts) 13800 7. Full load current (Amps) 366 8. Frequency (Hz) 60 Hz 9. No. Of phases / No of terminals 3 ph / 6 10. Power factor 0.8 (Lag) 11. No. Of poles 4 12. Insulation Class Stator: Class F Rotor: Class F 13. Temperature rise class limited to Class B 14. Enclosure Main: IP 54 15. Cooling System Main: IC 81W 16. Bearings Two nos. sleeve Bearings 17. Bearing oil feed system Forced Lubrication Used less than 1 year. Available due to complete plant closure. Still Under power