W 8L20DF
Описание двигателя Wärtsilä 8L20DF
Wärtsilä 8L20DF - 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 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 |
Notes:
Note 1 At ISO 3046-1 conditions (ambient air temperature 25°C, LT-water 25°C) and 100% load. Tolerance 5%.
Note 2 At ISO 3046-1 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 3046-1 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 3046/1, lower calorific value 42 700 kJ/kg for liquid fuel and 49620kJ/kg for gas fuel, with engine driven pumps. Tolerance 5%. Load according to propeller law for mechanical propulsion engines (ME).
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.
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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