W 8L46DF
Описание двигателя
Wärtsilä 8L46DF - 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 8L46DF |
ME |
DE | |||
|
Gas mode |
Diesel mode |
Gas mode |
Diesel mode | ||
|
Cylinder output |
kW |
1145 |
1145 | ||
|
Engine speed |
rpm |
600 |
600 | ||
|
Engine output |
kW |
9160 |
9160 | ||
|
Mean effective pressure |
MPa |
2.38 |
2.38 | ||
|
Combustion air system (Note 1) | |||||
|
Flow at 100% load |
kg/s |
14.7 |
16.4 |
14.7 |
16.4 |
|
Temperature at turbocharger intake, max. |
°C |
45 |
45 | ||
|
Temperature after air cooler, nom. (TE 601) |
°C |
45 |
50 |
45 |
50 |
|
Exhaust gas system (Note 2) | |||||
|
Flow at 100% load |
kg/s |
15.1 |
16.9 |
15.1 |
16.9 |
|
Flow at 75% load |
kg/s |
11.6 |
13.2 |
11.4 |
13.8 |
|
Flow at 50% load |
kg/s |
- |
9.5 |
- |
11.8 |
|
Temperature after turbocharger at 100% load (TE 517) |
°C |
354 |
354 |
354 |
354 |
|
Temperature after turbocharger at 75% load (TE 517) |
°C |
373 |
399 |
405 |
377 |
|
Temperature after turbocharger at 50% load (TE 517) |
°C |
- |
345 |
- |
320 |
|
Backpressure, max. |
kPa |
4 |
4 | ||
|
Calculated exhaust diameter for 35 m/s |
mm |
986 |
1041 |
986 |
1041 |
|
Heat balance at 100% load (Note 3) | |||||
|
Jacket water, HT-circuit |
kW |
928 |
1472 |
920 |
1472 |
|
Charge air, HT-circuit |
kW |
2008 |
2448 |
2008 |
2448 |
|
Charge air, LT-circuit |
kW |
808 |
920 |
808 |
920 |
|
Lubricating oil, LT-circuit |
kW |
624 |
1104 |
624 |
1104 |
|
Radiation |
kW |
264 |
270 |
264 |
270 |
|
Fuel consumption (Note 4) | |||||
|
Total energy consumption at 100% load |
kJ/kWh |
7290 |
- |
7290 |
- |
|
Total energy consumption at 75% load |
kJ/kWh |
7450 |
- |
7610 |
- |
|
Total energy consumption at 50% load |
kJ/kWh |
7910 |
- |
8250 |
- |
|
Fuel gas consumption at 100% load |
kJ/kWh |
7248 |
- |
7248 |
- |
|
Fuel gas consumption at 75% load |
kJ/kWh |
7387 |
- |
7551 |
- |
|
Fuel gas consumption at 50% load |
kJ/kWh |
7776 |
- |
8105 |
- |
|
Fuel oil consumption at 100% load |
g/kWh |
1.0 |
186 |
1.0 |
185 |
|
Fuel oil consumption at 75% load |
g/kWh |
1.3 |
193 |
1.3 |
198 |
|
Fuel oil consumption 50% load |
g/kWh |
3.2 |
196 |
3.4 |
204 |
|
Fuel gas system (Note 5) | |||||
|
Gas pressure at engine inlet, min (PT901) |
kPa (a) |
517 |
- |
517 |
- |
|
Gas pressure to Gas Valve unit, min |
kPa (a) |
517 |
- |
517 |
- |
|
Gas temperature before Gas Valve Unit |
°C |
0...60 |
- |
0...60 |
- |
|
Fuel oil system | |||||
|
Pressure before injection pumps (PT 101) |
kPa |
800±0 |
800±0 | ||
|
Fuel oil flow to engine, approx |
m3/h |
9.6 |
9.6 | ||
|
HFO viscosity before the engine |
cSt |
- |
16...24 |
- |
16...24 |
|
Max. HFO temperature before engine (TE 101) |
°C |
- |
140 |
- |
140 |
|
MDF viscosity, min. |
cSt |
2.0 |
2.0 | ||
|
Max. MDF temperature before engine (TE 101) |
°C |
40 |
40 | ||
|
Leak fuel quantity (HFO), clean fuel at 100% load |
kg/h |
- |
6.0 |
- |
6.0 |
|
Leak fuel quantity (MDF), clean fuel at 100% load |
kg/h |
15.5 |
30.0 |
|
30.0 |
|
Pilot fuel (MDF) viscosity before the engine |
cSt |
2...11 |
2...11 | ||
|
Pilot fuel pressure at engine inlet (PT 112) |
kPa |
400...800 |
400...800 | ||
|
Pilot fuel pressure drop after engine, max |
kPa |
150 |
150 | ||
|
Pilot fuel return flow at 100% load |
kg/h |
284 |
284 | ||
|
Lubricating oil system | |||||
|
Pressure before bearings, nom. (PT 201) |
kPa |
450 |
450 | ||
|
Pressure after pump, max. |
kPa |
800 |
800 | ||
|
Suction ability, including pipe loss, max. |
kPa |
40 |
40 | ||
|
Priming pressure, nom. (PT 201) |
kPa |
80 |
80 | ||
|
Temperature before bearings, nom. (TE 201) |
°C |
56 |
56 | ||
|
Temperature after engine, approx. |
°C |
75 |
75 | ||
|
Pump capacity (main), engine driven |
m3/h |
228 |
207 | ||
|
Pump capacity (main), electrically driven |
m3/h |
198 |
198 | ||
|
Oil flow through engine |
m3/h |
170 |
170 | ||
|
Priming pump capacity (50/60Hz) |
m3/h |
45.0 / 45.0 |
45.0 / 45.0 | ||
|
Oil volume in separate system oil tank |
m3 |
17 |
17 | ||
|
Oil consumption at 100% load, approx. |
g/kWh |
0.7 |
0.7 | ||
|
Crankcase ventilation flow rate at full load |
l/min |
1700 |
1700 | ||
|
Crankcase volume |
m3 |
4.2 |
4.2 | ||
|
Crankcase ventilation backpressure, max. |
Pa |
300 |
300 | ||
|
Oil volume in turning device |
l |
8.5...9.5 |
8.5...9.5 | ||
|
Oil volume in speed governor |
l |
1.7 |
1.7 | ||
|
HT cooling water system | |||||
|
Pressure at engine, after pump, nom. (PT 401) |
kPa |
250 + static |
250 + static | ||
|
Pressure at engine, after pump, max. (PT 401) |
kPa |
530 |
530 | ||
|
Temperature before cylinders, approx. (TE 401) |
°C |
74 |
74 | ||
|
Temperature after charge air cooler, nom. |
°C |
91 |
91 | ||
|
Capacity of engine driven pump, nom. |
m3/h |
180 |
180 | ||
|
Pressure drop over engine, total |
kPa |
100 |
100 | ||
|
Pressure drop in external system, max. |
kPa |
150 |
150 | ||
|
Pressure from expansion tank |
kPa |
70...150 |
70...150 | ||
|
Water volume in engine |
m3 |
1.4 |
1.4 | ||
|
LT cooling water system | |||||
|
Pressure at engine, after pump, nom. (PT 471) |
kPa |
250+ static |
250+ static | ||
|
Pressure at engine, after pump, max. (PT 471) |
kPa |
530 |
530 | ||
|
Temperature before engine, max. (TE 471) |
°C |
38 |
38 | ||
|
Temperature before engine, min. (TE 471) |
°C |
25 |
25 | ||
|
Capacity of engine driven pump, nom. |
m3/h |
180 |
180 | ||
|
Pressure drop over charge air cooler |
kPa |
50 |
50 | ||
|
Pressure drop in external system, max. |
kPa |
200 |
200 | ||
|
Pressure from expansion tank |
kPa |
70...150 |
70...150 | ||
|
Starting air system (Note 6) | |||||
|
Pressure, nom. (PT 301) |
kPa |
3000 |
3000 | ||
|
Pressure at engine during start, min. (20 °C) |
kPa |
1500 |
1500 | ||
|
Pressure, max. (PT 301) |
kPa |
3000 |
3000 | ||
|
Low pressure limit in starting air vessel |
kPa |
1800 |
1800 | ||
|
Consumption per start at 20 °C (successful start) |
Nm3 |
8.0 |
8.0 | ||
|
Consumption per start at 20 °C (with slowturn) |
Nm3 |
9.0 |
9.0 | ||
Notes:
Note 1 - At ISO 15550 conditions (ambient air temperature 25°C, LT-water 25°C) and 100% load. Tolerance 5%.
Note 2 - At ISO 15550 conditions (ambient air temperature 25°C, LT-water 25°C) and 100% load. Flow tolerance 5% and temperature tolerance 15°C.
Note 3 - At ISO 15550 conditions (ambient air temperature 25°C, LT-water 25°C) and 100% load. Tolerance for cooling water heat 10%, tolerance for radiation heat 30%. Fouling factors and a margin to be taken into account when dimensioning heat exchangers.
Note 4 - According to ISO 15550, lower calorific value 42700 kJ/kg, with engine driven pumps (two cooling water + one lubricating oil pumps). Tolerance 5%. The fuel consumption at 85 % load is guaranteed and the values at other loads are given for indication only.
Note 5 - 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 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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