WÄRTSILÄ WARTSILA 20, Product Manual, Page: 17 / 178

3. Technical Data
3.1 Wärtsilä 4L20
ME
SCR
mode
ME
SCR
mode
AE/DE
SCR
mode
AE/DE
SCR
mode
ME
Tier 2
mode
ME
Tier 2
mode
AE/DE
Tier 2
mode
AE/DE
Tier 2
mode
Wärtsilä 4L20
200 200 200 185 200 200 200 185
kW Cylinder output
1000 1000 1000 900 1000 1000 1000 900 RPM Engine speed
800 800 800 740 800 800 800 740 kW Engine output
2.73 2.73 2.73 2.8 2.73 2.73 2.73 2.8 MPa Mean effective pressure
Combustion air system (Note 1)
1.5 1.5 1.5 1.38 1.5 1.57 1.5 1.38 kg/s Flow at 100% load
45 45 45 45 45 45 45 45
°C Temperature at turbocharger intake, max.
50...70 50...70 50...70 50...70 50...70 50...70 50...70 50...70 °C Temperature after air cooler (TE601)
Exhaust gas system (Note 2)
1.55 1.55 1.55 1.42 1.55 1.55 1.55 1.42 kg/s Flow at 100% load
1.43 1.36 1.43 1.24 1.43 1.39 1.43 1.31
kg/s Flow at 85% load
1.29 1.2 1.29 1.08 1.29 1.2 1.29 1.16
kg/s Flow at 75% load
0.93 0.8 0.93 0.81 0.93 0.8 0.93 0.81
kg/s Flow at 50% load
365 370 365 370 365 370 365 370
°C Temperature after turbocharger, 100% load
(TE517)
340 340 340 340 335 340 335 335
°C Temperature after turbocharger, 85% load
(TE517)
340 350 340 340 335 350 335 335
°C Temperature after turbocharger, 75% load
(TE517)
355 385 355 355 355 385 355 355
°C Temperature after turbocharger, 50% load
(TE517)
5.0 5.0 5.0 5.0 5.0 5.0 5.0 5.0
kPa Backpressure, max.
318 320 318 306 318 320 318 306
mm Calculated pipe diameter for 35 m/s
Heat balance (Note 3)
175 175 175 166 175 175 175 166
kW Jacket water, HT-circuit
275 275 275 251 275 275 275 251
kW Charge air, LT-circuit
130 130 130 122 130 130 130 122
kW Lubricating oil, LT-circuit
33 33 34 33 33 33 33 32
kW Radiation
Fuel system (Note 4)
700±50 700±50 700±50 700±50 700±50 700±50 700±50 700±50 kPa Pressure before injection pumps (PT101)
0.87 0.87 0.87 0.78 0.87 0.87 0.87 0.78 m 3 /h Engine driven pump capacity (MDF only)
0.71 0.71 0.71 0.65 0.71 0.71 0.7 0.65 m 3 /h Fuel flow to engine (without engine driven
pump), approx.
16... 24 16... 24 16... 24 16... 24 16... 24 16... 24 16... 24 16... 24 cSt HFO viscosity before engine
140 140 140 140 140 140 140 140 °C Max. HFO temperature before engine (TE101)
1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 cSt MDF viscosity, min.
Wärtsilä 20 Product Guide - a13 - 6 September 2016 3-1
3. Technical Data Wärtsilä 20 Product Guide