W 8L20DF

Wärtsilä 8L20DF

IMO Tier 2

AE/DE

AE/DE

ME

Gas

Dies.

Gas

Dies.

Gas

Dies.

Cylinder output

kW

146

176

176

Engine speed

rpm

1000

1200

1200

Engine output

kW

1168

1408

1408

Mean effective pressure

MPa

1.99

2.0

2.0

Combustion air system (Note 1)

Flow at 100% load

kg/s

1.9

2.4

2.4

3.0

2.3

3.0

Temperature at turbocharger intake, max.

°C

45

45

45

Temperature after air cooler (TE 601)

°C

45

50

45

50

45

50

Exhaust gas system (Note 2)

Flow at 100% load

kg/s

2.0

2.5

2.5

3.1

2.4

3.1

Flow at 75% load

kg/s

1.6

1.9

2.0

2.3

1.8

2.2

Flow at 50% load

kg/s

1.2

1.3

1.4

1.6

1.5

1.3

Temperature after turbocharger at 100% load (TE 517)

°C

372

310

350

322

362

312

Temperature after turbocharger at 75% load (TE 517)

°C

382

345

367

345

358

345

Temperature after turbocharger at 50% load (TE 517)

°C

382

350

387

350

337

350

Backpressure, max.

kPa

3

3

3

Calculated exhaust diameter for 35 m/s

mm

364

386

399

435

395

432

Heat balance at 100% load (Note 3)

Jacket water, HT-circuit

kW

244

252

293

309

293

323

Charge air, LT-circuit

kW

277

395

400

551

376

576

Lubricating oil, LT-circuit

kW

155

175

187

213

187

223

Radiation

kW

59

65

69

83

69

83

Fuel consumption (Note 4)

Total energy consumption at 100% load

kJ/kWh

8540

-

8710

-

8710

-

Total energy consumption at 75% load

kJ/kWh

9370

-

9640

-

9110

-

Total energy consumption at 50% load

kJ/kWh

10240

-

10920

-

10320

-

Fuel gas consumption at 100% load

kJ/kWh

8293

-

8500

-

8500

-

Fuel gas consumption at 75% load

kJ/kWh

9036

-

9361

-

8840

-

Fuel gas consumption at 50% load

kJ/kWh

9722

-

10516

-

9913

-

Fuel oil consumption at 100% load

g/kWh

5.8

194

4.8

203

4.8

204

Fuel oil consumption at 75% load

g/kWh

7.9

197

6.3

204

6.3

200

Fuel oil consumption 50% load

g/kWh

12.1

206

9.5

216

9.5

204

Fuel gas system (Note 5)

Gas pressure at engine inlet, min (PT901)

kPa (a)

520

-

550

-

550

-

Gas pressure to Gas Valve unit, min

kPa (a)

640

-

670

-

670

-

Gas temperature before Gas Valve Unit

°C

0...60

-

0...60

-

0...60

-

Fuel oil system

Pressure before injection pumps (PT 101)

kPa

700±50

700±50

700±50

Fuel oil flow to engine, approx

m3/h

1.3

1.6

1.6

HFO viscosity before the engine

cSt

-

16...24

-

16...24

-

16...24

MDF viscosity, min.

cSt

1.8

1.8

1.8

Max. HFO temperature before engine (TE 101)

°C

-

140

-

140

-

140

Leak fuel quantity (HFO), clean fuel at 100% load

kg/h

-

0.9

-

1.2

-

1.2

Leak fuel quantity (MDF), clean fuel at 100% load

kg/h

2.4

4.7

3.0

6.0

3.0

6.0

Pilot fuel pressure drop after engine, max

kPa

20

20

20

Lubricating oil system

Pressure before bearings, nom. (PT 201)

kPa

450

450

450

Suction ability, including pipe loss, max.

kPa

20

20

20

Priming pressure, nom. (PT 201)

kPa

80

80

80

Temperature before bearings, nom. (TE 201)

°C

66

66

66

Temperature after engine, approx.

°C

78

78

78

Pump capacity (main), engine driven

m3/h

48

48

64

Pump capacity (main), electrically driven

m3/h

27

27

27

Priming pump capacity (50/60Hz)

m3/h

8.6 / 10.5

8.6 / 10.5

8.6 / 10.5

Oil volume in separate system oil tank

m3

2

2

2

Oil consumption at 100% load, approx.

g/kWh

0.5

0.5

0.5

Crankcase ventilation flow rate at full load

l/min

823

823

823

Crankcase ventilation backpressure, max.

Pa

300

300

300

Oil volume in speed governor

l

1.4...2.2

1.4...2.2

1.4...2.2

HT cooling water system

Pressure at engine, after pump, nom. (PT 401)

kPa

200 + static

200 + static

200 + static

Pressure at engine, after pump, max. (PT 401)

kPa

500

500

350

Temperature before cylinders, approx. (TE 401)

°C

83

83

83

Temperature after engine, nom.

°C

91

91

91

Capacity of engine driven pump, nom.

m3/h

40

41

41

Pressure drop over engine, total

kPa

90

90

90

Pressure drop in external system, max.

kPa

150 (1.5)

150 (1.5)

150 (1.5)

Pressure from expansion tank

kPa

70...150

70...150

70...150

Water volume in engine

m3

0.15

0.15

0.15

Delivery head of stand-by pump

kPa

200

200

200

LT cooling water system

Pressure at engine, after pump, nom. (PT 471)

kPa

200+ static

200+ static

200+ static

Pressure at engine, after pump, max. (PT 471)

kPa

500

500

350

Temperature before engine, max. (TE 471)

°C

38

38

38

Temperature before engine, min. (TE 471)

°C

25

25

25

Capacity of engine driven pump, nom.

m3/h

48

51

51

Pressure drop over charge air cooler

kPa

30

30

30

Pressure drop in external system, max.

kPa

120 (1.2)

120 (1.2)

120 (1.2)

Pressure from expansion tank

kPa

70...150

70...150

70...150

Delivery head of stand-by pump

kPa

200

200

200

Starting air system

Pressure, nom.

kPa

3000

3000

3000

Pressure, max.

kPa

3000

3000

3000

Low pressure limit in air vessels

kPa

1800

1800

1800

Starting air consumption, start (successful)

Nm3

1.2

1.2

1.2

Wärtsilä 8L20DF

IMO Tier 2

AE/DE

AE/DE

ME

Gas

Dies.

Gas

Gas

Dies.

Cylinder output

kW

160

185

185

Engine speed

rpm

1000

1200

1200

Engine output

kW

1280

1480

1480

Mean effective pressure

MPa

2.18

2.1

2.1

Combustion air system (Note 1)

Flow at 100% load

kg/s

2.0

2.5

2.3

3.0

2.3

3.1

Temperature at turbocharger intake, max.

°C

45

45

45

Temperature after air cooler (TE 601)

°C

45

50

45

50

45

50

Exhaust gas system (Note 2)

Flow at 100% load

kg/s

2.1

2.6

2.4

3.1

2.4

3.1

Flow at 75% load

kg/s

1.6

1.9

1.9

2.3

1.9

2.2

Flow at 50% load

kg/s

1.2

1.4

1.5

1.6

1.4

1.4

Temperature after turbocharger at 100% load (TE 517)

°C

365

325

360

340

360

335

Temperature after turbocharger at 75% load (TE 517)

°C

410

340

380

350

375

365

Temperature after turbocharger at 50% load (TE 517)

°C

440

350

410

370

405

390

Backpressure, max.

kPa

4

4

4

Calculated exhaust diameter for 35 m/s

mm

371

400

395

439

395

442

Heat balance at 100% load (Note 3)

Jacket water, HT-circuit

kW

260

279

307

325

307

327

Charge air, LT-circuit

kW

333

440

387

600

413

627

Lubricating oil, LT-circuit

kW

180

187

213

223

213

223

Radiation

kW

60

60

67

67

67

67

Fuel consumption (Note 4)

Total energy consumption at 100% load

kJ/kWh

7980

-

8130

-

8170

-

Total energy consumption at 75% load

kJ/kWh

8560

-

8680

-

8600

-

Total energy consumption at 50% load

kJ/kWh

9400

-

9500

-

9270

-

Fuel gas consumption at 100% load

kJ/kWh

7809

-

7941

-

7980

-

Fuel gas consumption at 75% load

kJ/kWh

8329

-

8433

-

8347

-

Fuel gas consumption at 50% load

kJ/kWh

9208

-

9293

-

9064

-

Fuel oil consumption at 100% load

g/kWh

3.9

195

4.8

203

4.3

204

Fuel oil consumption at 75% load

g/kWh

5.3

196

5.8

204

5.8

200

Fuel oil consumption 50% load

g/kWh

4.3

206

4.8

216

4.8

204

Fuel gas system (Note 5)

Gas pressure at engine inlet, min (PT901)

kPa (a)

520

-

550

-

550

-

Gas pressure to Gas Valve unit, min

kPa (a)

640

-

670

-

670

-

Gas temperature before Gas Valve Unit

°C

0...60

-

0...60

-

0...60

-

Fuel oil system

Pressure before injection pumps (PT 101)

kPa

700±50

700±50

700±50

Fuel oil flow to engine, approx

m3/h

1.4

1.7

1.7

HFO viscosity before the engine

cSt

-

16...24

-

16...24

-

16...24

MDF viscosity, min.

cSt

1.8

1.8

1.8

Max. HFO temperature before engine (TE 101)

°C

-

140

-

140

-

140

Leak fuel quantity (HFO), clean fuel at 100% load

kg/h

-

1.0

-

1.2

-

1.2

Leak fuel quantity (MDF), clean fuel at 100% load

kg/h

2.6

5.2

3.2

6.3

3.2

6.3

Pilot fuel pressure drop after engine, max

kPa

20

20

20

Lubricating oil system

Pressure before bearings, nom. (PT 201)

kPa

450

450

450

Suction ability, including pipe loss, max.

kPa

20

20

20

Priming pressure, nom. (PT 201)

kPa

80

80

80

Temperature before bearings, nom. (TE 201)

°C

66

66

66

Temperature after engine, approx.

°C

78

78

78

Pump capacity (main), engine driven

m3/h

48

48

64

Pump capacity (main), electrically driven

m3/h

27

27

27

Priming pump capacity (50/60Hz)

m3/h

8.6 / 10.5

8.6 / 10.5

8.6 / 10.5

Oil volume in separate system oil tank

m3

2

2

2

Oil consumption at 100% load, approx.

g/kWh

0.5

0.5

0.5

Crankcase ventilation flow rate at full load

l/min

823

823

823

Crankcase ventilation backpressure, max.

Pa

300

300

300

Oil volume in speed governor

l

1.4...2.2

1.4...2.2

1.4...2.2

HT cooling water system

Pressure at engine, after pump, nom. (PT 401)

kPa

200 + static

200 + static

200 + static

Pressure at engine, after pump, max. (PT 401)

kPa

500

500

350

Temperature before cylinders, approx. (TE 401)

°C

83

83

83

Temperature after engine, nom.

°C

91

91

91

Capacity of engine driven pump, nom.

m3/h

40

41

41

Pressure drop over engine, total

kPa

90

90

90

Pressure drop in external system, max.

kPa

150 (1.5)

150 (1.5)

150 (1.5)

Pressure from expansion tank

kPa

70...150

70...150

70...150

Water volume in engine

m3

0.15

0.15

0.15

Delivery head of stand-by pump

kPa

200

200

200

LT cooling water system

Pressure at engine, after pump, nom. (PT 471)

kPa

200+ static

200+ static

200+ static

Pressure at engine, after pump, max. (PT 471)

kPa

500

500

350

Temperature before engine, max. (TE 471)

°C

38

38

38

Temperature before engine, min. (TE 471)

°C

25

25

25

Capacity of engine driven pump, nom.

m3/h

48

51

51

Pressure drop over charge air cooler

kPa

30

30

30

Pressure drop in external system, max.

kPa

120 (1.2)

120 (1.2)

120 (1.2)

Pressure from expansion tank

kPa

70...150

70...150

70...150

Delivery head of stand-by pump

kPa

200

200

200

Starting air system

Pressure, nom.

kPa

3000

3000

3000

Pressure, max.

kPa

3000

3000

3000

Low pressure limit in air vessels

kPa

1800

1800

1800

Starting air consumption, start (successful)

Nm3

1.2

1.2

1.2