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W 8L50DF

L50DF_разрез

Описание двигателя

Wärtsilä 8L50DF - восьмицилиндровый, рядный, четырехтактный, нереверсивный, с турбонаддувом, промежуточным охлаждением, двойной подачей топлива в двигатель, с прямым впрыском жидкого топлива и непрямым впрыском газообразного топлива. Двигатель может работать в газовом режиме или в режиме дизель.

Технические характеристики

Wärtsilä 8L50DF  IMO Tier 2

DE

DE

ME

Gas

mode

Diesel mode

Gas

mode

Diesel mode

Gas

mode

Diesel mode

Cylinder output

kW

950

975

975

Engine speed

rpm

500

514

514

Engine output

kW

7600

7800

7800

Mean effective pressure

MPa

2.0

2.0

2.0

Combustion air system (Note 1)

Flow at 100% load

kg/s

12.2

15.0

12.2

15.0

12.2

14.6

Temperature at turbocharger intake, max.

°C

45

45

45

Temperature after air cooler, nom. (TE 601)

°C

45

50

45

50

45

50

Exhaust gas system

Flow at 100% load

kg/s

12.5

15.4

12.5

15.4

12.5

15.0

Flow at 75% load

kg/s

9.5

11.9

9.5

11.9

9.6

11.2

Flow at 50% load

kg/s

7.2

8.4

7.2

8.4

7.1

8.1

Temperature after turbocharger at 100% load (TE 517)

°C

373

343

373

343

369

350

Temperature after turbocharger at 75% load (TE 517)

°C

424

351

424

351

388

380

Temperature after turbocharger at 50% load (TE 517)

°C

426

385

426

385

390

370

Backpressure, max.

kPa

4

4

4

Calculated exhaust diameter for 35 m/s

mm

910

986

910

986

907

979

Heat balance at 100% load (Note 2)

Jacket water, HT-circuit

kW

880

1387

880

1387

853

1440

Charge air, HT-circuit

kW

1120

1680

1120

1680

1147

1653

Charge air, LT-circuit

kW

667

840

667

840

667

813

Lubricating oil, LT-circuit

kW

627

1040

627

1040

627

1093

Radiation

kW

213

240

213

240

280

307

Fuel consumption (Note 3)

Total energy consumption at 100% load

kJ/kWh

7300

-

7300

-

7300

-

Total energy consumption at 75% load

kJ/kWh

7620

-

7620

-

7490

-

Total energy consumption at 50% load

kJ/kWh

8260

-

8260

-

7830

-

Fuel gas consumption at 100% load

kJ/kWh

7258

-

7258

-

7258

-

Fuel gas consumption at 75% load

kJ/kWh

7562

-

7562

-

7429

-

Fuel gas consumption at 50% load

kJ/kWh

8153

-

8153

-

7734

-

Fuel oil consumption at 100% load

g/kWh

1.0

189

1.0

189

1.0

190

Fuel oil consumption at 75% load

g/kWh

1.5

192

1.5

192

1.5

196

Fuel oil consumption 50% load

g/kWh

2.4

204

2.4

204

2.3

200

Fuel gas system (Note 4)

Gas pressure at engine inlet, min (PT901)

kPa (a)

472

-

472

-

472

-

Gas pressure to Gas Valve unit, min

kPa (a)

592

-

592

-

592

-

Gas temperature before Gas Valve Unit

°C

0...60

-

0...60

-

0...60

-

Fuel oil system

Pressure before injection pumps (PT 101)

kPa

800±50

800±50

800±50

Fuel oil flow to engine, approx

m3/h

8.1

8.3

8.4

HFO viscosity before the engine

cSt

-

16...24

-

16...24

-

16...24

Max. HFO temperature before engine (TE 101)

°C

-

140

-

140

-

140

MDF viscosity, min.

cSt

2.0

2.0

2.0

Max. MDF temperature before engine (TE 101)

°C

45

45

45

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

kg/h

-

6.0

-

6.0

-

6.2

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

kg/h

16.0

30.1

16.0

30.1

15.5

31.1

Pilot fuel (MDF) viscosity before the engine

cSt

2...11

2...11

2...11

Pilot fuel pressure at engine inlet (PT 112)

kPa

400...800

400...800

400...800

Pilot fuel pressure drop after engine, max

kPa

150

150

150

Pilot fuel return flow at 100% load

kg/h

284

284

284

Lubricating oil system (Note 5)

Pressure before bearings, nom. (PT 201)

kPa

400

400

400

Pressure after pump, max.

kPa

800

800

800

Suction ability, including pipe loss, max.

kPa

40

40

40

Priming pressure, nom. (PT 201)

kPa

80

80

80

Temperature before bearings, nom. (TE 201)

°C

63

63

63

Temperature after engine, approx.

°C

78

78

78

Pump capacity (main), engine driven

m3/h

149

153

198

Pump capacity (main), electrically driven

m3/h

145

145

145

Oil flow through engine

m3/h

115

115

115

Priming pump capacity (50/60Hz)

m3/h

45.0 / 45.0

45.0 / 45.0

45.0 / 45.0

Oil volume in separate system oil tank

m3

11

11

11

Oil consumption at 100% load, approx.

g/kWh

0.5

0.5

0.5

Crankcase ventilation flow rate at full load

l/min

1500

1500

1500

Crankcase volume

m3

19.5

19.5

19.5

Crankcase ventilation backpressure, max.

Pa

500

500

500

Oil volume in turning device

l

8.5...9.5

8.5...9.5

8.5...9.5

Oil volume in speed governor

l

1.4

1.4

1.4

HT cooling water system

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

kPa

250 + static

250 + static

250 + static

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

kPa

480

480

480

Temperature before cylinders, approx. (TE 401)

°C

74

74

74

Temperature after charge air cooler, nom.

°C

91

91

91

Capacity of engine driven pump, nom.

m3/h

180

180

180

Pressure drop over engine, total

kPa

50

50

50

Pressure drop in external system, max.

kPa

150

150

150

Pressure from expansion tank

kPa

70...150

70...150

70...150

Water volume in engine

m3

1.35

1.35

1.35

LT cooling water system

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

kPa

250+ static

250+ static

250+ static

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

kPa

440

440

440

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

180

180

180

Pressure drop over charge air cooler

kPa

30

30

30

Pressure drop in external system, max.

kPa

200

200

200

Pressure from expansion tank

kPa

70...150

70...150

70...150

Starting air system (Note 6)

Pressure, nom. (PT 301)

kPa

3000

3000

3000

Pressure at engine during start, min. (20 °C)

kPa

1000

1000

1000

Pressure, max. (PT 301)

kPa

3000

3000

3000

Low pressure limit in starting air vessel

kPa

1800

1800

1800

Consumption per start at 20 °C (successful start)

Nm3

4.8

4.8

4.8

Consumption per start at 20 °C (with slowturn)

Nm3

5.8

5.8

5.8


Notes:

Note 1 - At Gas LHV 49620kJ/kg

Note 2 - At 100% output and nominal speed. The figures are valid for ambient conditions according to ISO 15550, except for LT-water temperature, which is 35ºC in gas operation and 45ºC in back-up fuel operation. And with engine driven water, lube oil and pilot fuel pumps.

Note 3 - According to ISO 15550, lower calorific value 42700 kJ/kg, with engine driven pumps (two cooling water + one lubricating oil pumps). Tolerance 5%. Gas Lower heating value >28 MJ/m3N and Methane Number High (>80). The fuel consumption BSEC and SFOC are guaranteed at 100% load and the values at other loads are given for indication only.

Note 4 - Fuel gas pressure given at LHV ≥ 36MJ/m³N. Required fuel gas pressure depends on fuel gas LHV and need to be increased for lower LHV's. Pressure drop in external fuel gas system to be considered.

Note 5 - Lubricating oil treatment losses and oil changes are not included in oil consumption. The lubricating oil volume of the governor is depending of the governor type.

Note 6 - At manual starting the consumption may be 2...3 times lower.


ME = Engine driving propeller, variable speed

AE = Auxiliary engine driving generator

DE = Diesel-Electric engine driving generator


Subject to revision without notice.



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