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W 12V38

V38DF_разрез

Описание двигателя Wärtsilä 12V38

Wärtsilä 12V38 - двенадцатицилиндровый, V-образный, четырехтактный, реверсивный, с турбонаддувом и промежуточным охлаждением дизельный двигатель, с прямым впрыском топлива.

Технические характеристики

Diesel engine Wärtsilä 12V38

 

DE

CPP

Engine speed

RPM

600

600

Engine output

kW

8700

8700

Cylinder bore

mm

380

380

Stroke

mm

475

475

Mean effective pressure

MPa

2.7

2.7

Mean piston speed

m/s

9.5

9.5

Idling speed

rpm

320

320

Combustion air system

 

 

 

Flow of air at 100% load

kg/s

15.22

15.22

Ambient air temperature, max.

°C

45

45

Air temperature after air cooler (TE601)

°C

50

50

Air temperature after air cooler, alarm

°C

60

60

Exhaust gas system (Note 1)

 

 

 

Exhaust gas flow, 100% load

kg/s

15.7

15.7

Exhaust gas flow, 85% load

kg/s

15.19

14.5

Exhaust gas flow, 75% load

kg/s

13.83

12.62

Exhaust gas flow, 50% load

kg/s

9.72

9.85

Exhaust gas temperature after turbocharger, 100% load (TE517)

°C

389

389

Exhaust gas temperature after turbocharger, 85% load (TE517)

°C

309

320

Exhaust gas temperature after turbocharger, 75% load (TE517)

°C

307

328

Exhaust gas temperature after turbocharger, 50% load (TE517)

°C

323

314

Exhaust gas back pressure, max.

kPa

3

3

Exhaust gas pipe diameter, min.

mm

900

900

Calculated exhaust diameter for 35 m/s

mm

1032

1032

Heat balance at 100% load (Note 2)

 

 

 

Jacket water, HT-circuit

kW

1001

1001

Charge air, HT-circuit

kW

1663

1663

Lubricating oil, LT-circuit

kW

1042

1042

Charge air, LT-circuit

kW

770

770

Radiation

kW

340

340

Fuel system (Note 3)

 

 

 

Pressure before injection pumps (PT101)

kPa

700

700

Viscosity before injection pumps (HFO)

cSt

16..24

16..24

Viscosity before injection pumps (MDF), min.

cSt

2

2

Fuel temperature before injection pumps (HFO) (TE101)

°C

< 140

< 140

Fuel temperature before injection pumps (MDF) (TE101)

°C

< 45

< 45

Circulating fuel flow / consumption ratio (100% load), min.

 

4:1

4:1

Fuel consumption (HFO), 100% load

g/kWh

182

182

Fuel consumption (HFO), 85% load

g/kWh

178

176

Fuel consumption (HFO), 75% load

g/kWh

179

175

Fuel consumption (HFO), 50% load

g/kWh

185

180

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

kg/h

3.3

3.3

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

kg/h

33.1

33.1

Lubricating oil system

 

 

 

Pressure before engine, nom. (PT201)

kPa

450

450

Pressure before engine, alarm (PT201)

kPa

380

380

Pressure before engine, stop (PT201)

kPa

340

340

Priming pressure, nom. (PT201)

kPa

50

50

Temperature before engine, nom. (TE201)

°C

63

63

Temperature before engine, alarm (TE201)

°C

70

70

Temperature after engine, approx.

°C

80

80

Pump capacity (main), engine driven

m³/h

155

155

Pump capacity (main), separate

m³/h

131

131

Pump capacity (priming), 50/60 Hz

m³/h

35 / 35

35 / 35

Suction ability of main engine driven pump (including pressure losses in pipes), max.

kPa

40

40

Oil volume in separate system oil tank, nom.

11.8

11.8

Filter fineness, mesh size

μm

30

30

Filters difference pressure, alarm

kPa

100

100

Oil consumption (100% load), approx.

g/kWh

0.7

0.7

Crankcase ventilation flow rate

l/min/cyl

210

210

Crankcase backpressure, max.

kPa

0.2

0.2

High temperature cooling water system

 

 

 

Pressure before engine, nom. (PT401)

kPa

380 + static

380 + static

Pressure before engine, alarm (PT401)

kPa

250 + static

250 + static

Pressure before engine, max. (PT401)

kPa

460 + static

460 + static

Temperature before engine, approx. (TE401)

°C

73

73

Temperature after engine, nom. (TE402)

°C

93

93

Temperature after engine, alarm (TE402)

°C

103

103

Temperature after engine, stop (TE402)

°C

110

110

Pump capacity, nom.

m³/h

132

132

Pressure drop over engine

kPa

180

180

Water volume in engine

0.6

0.6

Pressure from expansion tank

kPa

70...150

70...150

Pressure drop over external system, max.

kPa

160

160

Delivery head of stand-by pump

kPa

380

380

Low temperature cooling water system

 

 

 

Pressure before charge air cooler, nom. (PT471)

kPa

340 + static

340 + static

Pressure before charge air cooler, alarm (PT471)

kPa

250 + static

250 + static

Pressure before charge air cooler, max. (PT471)

kPa

460 + static

460 + static

Temperature before engine, max. (TE471)

°C

38

38

Temperature after engine, min.

°C

44

44

Pump capacity, nom.

m³/h

168

168

Pressure drop over engine

kPa

180

180

Water volume in engine

0.6

0.6

Pressure drop over external system, max.

kPa

120

120

Pressure from expansion tank

kPa

70...150

70...150

Delivery head of stand-by pump

kPa

340

340

Starting air system (Note 4)

 

 

 

Air pressure, nom. (PT301)

kPa

3000

3000

Air pressure, min. (20°C) (PT301)

kPa

1200

1200

Air pressure, max. (PT301)

kPa

3000

3000

Low pressure limit in air vessels

kPa

1800

1800

Air consumption per start (20°C)

Nm3

4.7

4.7

Air consumption per start, with generator (20°C)

Nm3

6.7

6.7

COMMON RAIL

 

 

 

Fuel system

 

 

 

Pressure before injection pumps, min.

kPa

1000

1000

Viscosity before injection pumps (HFO)

cSt

16..24

16..24

Viscosity before injection pumps (MDF)

cSt

2

2

Quantity of clean leak fuel, HFO (100% load, excluding injector return)

kg/h

1.7

1.7

Quantity of clean leak fuel, MDF (100% load, excluding injector return)

kg/h

16.6

16.6

Clean return fuel from fuel injector, HFO (100% load)

kg/h

331

331

Clean return fuel from fuel injector, MDF (100% load)

kg/h

331

331

Fuel temperature before fuel pumps (HFO)

°C

< 140

< 140

Fuel temperature before fuel pumps (MDF)

°C

< 45

< 45

Circulating fuel flow / consumption ratio (100%) load, min.

 

3:1

3:1

Mixing tank pressure, max.

kPa

500

500

Filter absolute mesh size (HFO), max. (automatic fine filter)

μm

10

10

Filter absolute mesh size (MDF), max. (automatic or duplex filter)

μm

10

10

Safety filter absolute mesh size (HFO), max.

μm

25

25

Lubricating oil system

 

 

 

Pressure at engine inlet, nom.

kPa

450

450

Pressure after control oil pump, nom.

kPa

25000

25000

Control oil flow to engine (engine running), nom.

l/min/cyl

0.5

0.5

Control oil flow to engine, max. momentary flow (= max. pump capacity)

l/min

110

110

Temperature before control oil pump, nom.

°C

63

63

Filter absolute mesh size, max. (automatic fine filter)

μm

10

10

Filter absolute mesh size, max. (by-pass filter for automatic filter)

μm

25

25

Running-in filters on injectors holder mesh size, max.

μm

100

100

Starting air system

 

 

 

Air consumption per start (20°C)

Nm3

4.7

4.7

Notes:

Note 1 At ISO 3046/1 conditions and 100% load. Flow tolerance 5% and temperature tolerance ±10°C.

Note 2 At ISO 3046/1 conditions and 100% load. Tolerance for cooling water heat ±10%, tolerance for radiation heat ±15%. Fouling factors and a margin to be taken into account when dimensioning heat exchangers.

Note 3 According to ISO 3046/1, lower calorofic value 42 700 kJ/kg at constant engine speed, with engine driven pumps. Tolerance 5%. Constant speed applications are Auxiliary and DE. Mechanical propulsion variable speed applications according to propeller law.

Note 4 Starting procedure performed by automation system. Starting air consumption is higher for propulsion engines without clutch.

Subject to revision without notice.


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