ME
IMO Tier 2
AUX
IMO Tier 2
AUX
IMO Tier 2
DE
IMO Tier 2
DE
IMO Tier 2
Wärtsilä 8V31
750
610
750
610
720
590
750
610
720
590
RPM
kW/cyl
Engine speed
Cylinder output
110
110
110
110
110
kPa
Pressure drop over charge air cooler (two-stage)
115
115
115
115
115
kPa
Pressure drop over oil cooler
100
100
100
100
100
kPa
Pressure drop in external system, max.
70 ... 150
70 ... 150
70 ... 150
70 ... 150
70 ... 150
kPa
Pressure from expansion tank
Starting air system
3000
3000
3000
3000
3000
kPa
Pressure, nom.
1500
1500
1500
1500
1500
kPa
Pressure at engine during start, min. (20°C)
3000
3000
3000
3000
3000
kPa
Pressure, max.
1600
1600
1600
1600
1600
kPa
Low pressure limit in air vessels
4.9
4.9
4.9
4.9
4.9
Nm
3
Air consumption per start
Notes:
At ISO 15550 conditions (ambient air temperature 25°C, LT-water 25°C) and 100% load. Flow tolerance 5%.
Note 1
At ISO 15550 conditions (ambient air temperature 25°C, LT-water 25°C). Flow tolerance 5% and temperature tolerance
10°C.
Note 2
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 20%. Fouling factors and a margin to be taken into account when dimensioning heat
exchangers. In arctic option charge air coolers in LT circuit.
Note 3
At ambient conditions according to ISO 15550. Lower calorific value 42 700 kJ/kg. With engine driven pumps (two cooling
water + one lubricating oil pump). Tolerance 5%.
Note 4
ME = Engine driving propeller, variable speed
AE = Auxiliary engine driving generator
DE = Diesel-Electric engine driving generator
Subject to revision without notice.
Wärtsilä 31 Product Guide - a1 - 18 October 2016
3-3
3. Technical Data
Wärtsilä 31 Product Guide
Содержание 31
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