Wartsila, 18V50DF, 2011, 106 MW Combined Cycle Power Barge, 60 Hz, Dual Fuel

Overview

1. Estrella del Mar II

2. 106 mw combined cycle medium speed engine power barge operating on natural gas or low sulfur heavy fuel oil.

Operational Profile

1. Built and commissioned in 2011 by Wartsila.

2. Currently moored in the.

3. Total average operating hours across 6 engines (June 2022) around 88,000 operating hours.

Basic Power Generation Characteristics

1. Six Wartsila 18V50DF medium speed engines rated ~16.9 MWe each.

2. One Dresser Rand steam turbine generator rated ~ 10,500 KVA.

3. Total plant output rating at HV/GSU on HFO ~108 MWe; on natural gas ~106 MWe.

4. Output frequency 60 Hz at 13.8 kV.

5. Highly efficient and reliable performance.

6. Availability 2012-2016 - 91.1% (97.3% for 2016).

7. Heat rate on natural gas (BTU/kWh HHV) 7,138 BTU/kWh.

8. Heat rate on heavy fuel oil (BTU/kWh HHV) 7,138 BTU/kWh.

Configuration

1. Two engine halls (each with 3 engines).

2. Waste heat recovery section (amidships).

3. Deckhouse (amidships).

4. General arrangement plan: available.

5. General arrangement elevation: available.

Power Barge Physical Dimensions

1. Length 104.4 meters.

2. Width 32 meters.

3. Height (air draft) ~ 29 meters.

4. Depth 5.5 meters.

5. Draft 3.2-4 meters.

Codes and Classification

1. Marine (ABS – power barge hull was designed, built and supervised during construction by ABS).

2. Industrial plant.

3. UBC.

4. ISO 1996.

5. EN.

6. DIN.

7. IEC, IEEE.

Mooring Systems

1. Spud and clamp system (with tiebacks).

2. 2 pairs of spud and clamp devices inboard.

3. Wind load: 120 mph sustained.

4. Current: 10 knots.

5. Tidal fluctuations (surge): 3 meters.

Access Ramps and Connections

1. Two access ramps: truck ramp, personnel.

2. MV cableway.

3. HFO and diesel oil flex hoses.

4. Natural gas flex hose.

5. LO flex hose.

6. Sludge flex hose.

7. Water and fire fighting flex hoses.

Wartsila 18V50DF Characteristics

1. 18V50DF.

2. Cylinder bore 500 mm.

3. Stroke 580 mm.

4. Speed 514 rpm.

5. Mean effective pressure 19.5 bar.

6. Compression ratio 11.5:1.

7. Fwd flywheel rotation clockwise.

Steam Turbine Generator Characteristics

1. Single cylinder multi-stage.

2. Impulse/condensing.

3. Gearbox 1800 rpm.

4. Electronic governor.

5. Hydraulic relay.

6. Turbine protection system.

Fuel System – Heavy Fuel Oil

1. Heavy fuel oil.

2. Up to 700 CST.

3. HFO temperature at HP pumps 120 C @ 500 CST.

4. HFO centrifuges AL 886 - 3 running, one stand-by at plant full load on HFO.

5. Starting and stopping on HFO and diesel when in gas mode.

Fuel Systems – Natural Gas

1. Natural gas.

2. Pressure – 6.2 bar LP, 3.1 – 3.4 bar at engine inlet.

3. Max flow rate – 23,160 Sm3/h.

4. Consumption – 3,800 Sm3/h = 20,800 MMBTU/day at power plant full load.

5. Starting and stopping fuel – light fuel oil.

Internal Tank Capacities

1. Light fuel oil tanks (2) 785/807 m3.

2. Heavy fuel oil buffer tanks (2) 455/429 m3.

3. Heavy fuel oil day tanks (2) 384/384 m3.

4. Pilot fuel oil tank 195 m3.

5. New lube oil tank 202 m3.

6. Used lube oil tank 164 m3.

7. Fresh water/fire fighting tank (2) 381/381 m3.

8. Treated water tank 282 m3.

Engine/Condenser Cooling Water System

1. River water intake.

2. Discharge downstream.

3. Pumping flat below deck.

Modification Options

1. Cooling towers (landside).

2. SCR/CO (on barge).

3. 50 Hz conversion to 11.2 kV under technical review.

4. Generator swap.

5. Frequency inverter (shoreside).