W 8L50DF
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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