Wartsila 31 Product Manual page 17

Wärtsilä 31 Product Guide
Wärtsilä 8V31
Engine speed
Cylinder output
Pressure drop over charge air cooler (two-stage)
Pressure drop over oil cooler
Pressure drop in external system, max.
Pressure from expansion tank
Starting air system
Pressure, nom.
Pressure at engine during start, min. (20°C)
Pressure, max.
Low pressure limit in air vessels
Air consumption per start
Notes:
Note 1
Note 2
Note 3
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
At ISO 15550 conditions (ambient air temperature 25°C, LT-water 25°C) and 100% load. Flow tolerance 5%.
At ISO 15550 conditions (ambient air temperature 25°C, LT-water 25°C). Flow tolerance 5% and temperature tolerance
10°C.
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.
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%.
DE DE
IMO Tier 2 IMO Tier 2
RPM 720 750
kW/cyl 590 610
kPa
110 110
kPa
115 115
kPa
100 100
kPa 70 ... 150 70 ... 150
kPa
3000 3000
kPa
1500 1500
kPa
3000 3000
kPa
1600 1600
Nm 3
4.9 4.9
3. Technical Data
AUX AUX ME
IMO Tier 2 IMO Tier 2 IMO Tier 2
720 750 750
590 610 610
110 110 110
115 115 115
100 100 100
70 ... 150 70 ... 150 70 ... 150
3000 3000 3000
1500 1500 1500
3000 3000 3000
1600 1600 1600
4.9 4.9 4.9
3-3