Wartsila 31 User manual
PRODUCT GUIDE
Wärtsilä 31
© Copyright by WÄRTSILÄ FINLAND Oy
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Introduction
This Product Guide provides data and system proposals for the early design phase of marine
engine installations. For contracted projects specific instructions for planning the installation
are always delivered. Any data and information herein is subject to revision without notice.
UpdatesPublishedIssue
First version of Product Guide W3118.10.20161/2016
Wärtsilä, Marine Solutions
Vaasa, October 2016
Wärtsilä 31 Product Guide - a1 - 18 October 2016 iii
IntroductionWärtsilä 31 Product Guide
Table of contents
1-11. Main Data and Outputs .......................................................................................................................
1-11.1 Maximum continuous output .......................................................................................................
1-21.2 Reference conditions ...................................................................................................................
1-21.3 Operation in inclined position .....................................................................................................
1-31.4 Dimensions and weights .............................................................................................................
2-12. Operating Ranges ................................................................................................................................
2-12.1 Engine operating range ...............................................................................................................
2-22.2 Loading capacity .........................................................................................................................
2-42.3 Operation at low load and idling ..................................................................................................
2-42.4 Low air temperature ....................................................................................................................
3-13. Technical Data ......................................................................................................................................
3-13.1 Wärtsilä 8V31 ...............................................................................................................................
3-43.2 Wärtsilä 10V31 .............................................................................................................................
3-73.3 Wärtsilä 12V31 .............................................................................................................................
3-103.4 Wärtsilä 14V31 .............................................................................................................................
3-133.5 Wärtsilä 16V31 .............................................................................................................................
4-14. Description of the Engine ....................................................................................................................
4-14.1 Definitions ....................................................................................................................................
4-14.2 Main components and systems ..................................................................................................
4-54.3 Expected overhaul intervals and life times ..................................................................................
4-54.4 Engine storage .............................................................................................................................
5-15. Piping Design, Treatment and Installation .........................................................................................
5-15.1 Pipe dimensions ..........................................................................................................................
5-25.2 Trace heating ...............................................................................................................................
5-25.3 Pressure class ..............................................................................................................................
5-35.4 Pipe class ....................................................................................................................................
5-45.5 Insulation .....................................................................................................................................
5-45.6 Local gauges ...............................................................................................................................
5-45.7 Cleaning procedures ...................................................................................................................
5-55.8 Flexible pipe connections ............................................................................................................
5-65.9 Clamping of pipes ........................................................................................................................
6-16. Fuel Oil System ....................................................................................................................................
6-16.1 Acceptable fuel characteristics ...................................................................................................
6-56.2 Internal fuel oil system .................................................................................................................
6-86.3 External fuel oil system ................................................................................................................
7-17. Lubricating Oil System ........................................................................................................................
7-17.1 Lubricating oil requirements ........................................................................................................
7-27.2 Internal lubricating oil system ......................................................................................................
7-57.3 External lubricating oil system .....................................................................................................
7-117.4 Crankcase ventilation system ......................................................................................................
7-137.5 Flushing instructions ....................................................................................................................
8-18. Compressed Air System ......................................................................................................................
8-18.1 Instrument air quality ...................................................................................................................
8-18.2 Internal compressed air system ..................................................................................................
8-38.3 External compressed air system .................................................................................................
iv Wärtsilä 31 Product Guide - a1 - 18 October 2016
Wärtsilä 31 Product GuideTable of contents
9-19. Cooling Water System .........................................................................................................................
9-19.1 Water quality ...............................................................................................................................
9-29.2 Internal cooling water system ......................................................................................................
9-89.3 External cooling water system ....................................................................................................
10-110. Exhaust Gas System ............................................................................................................................
10-110.1 Internal exhaust gas system ........................................................................................................
10-410.2 Exhaust gas outlet .......................................................................................................................
10-610.3 External exhaust gas system .......................................................................................................
11-111. Turbocharger Cleaning ........................................................................................................................
11-111.1 Turbine cleaning system ..............................................................................................................
11-211.2 Compressor cleaning system ......................................................................................................
12-112. Exhaust Emissions ...............................................................................................................................
12-112.1 Diesel engine exhaust components ............................................................................................
12-212.2 Marine exhaust emissions legislation ..........................................................................................
12-612.3 Methods to reduce exhaust emissions ........................................................................................
13-113. Automation System .............................................................................................................................
13-113.1 Technical data and system overview ...........................................................................................
13-513.2 Functions ....................................................................................................................................
13-713.3 Alarm and monitoring signals ......................................................................................................
13-713.4 Electrical consumers ...................................................................................................................
13-913.5 System requirements and guidelines for diesel-electric propulsion ............................................
14-114. Foundation ............................................................................................................................................
14-114.1 Steel structure design ..................................................................................................................
14-114.2 Mounting of main engines ...........................................................................................................
14-814.3 Mounting of generating sets ........................................................................................................
14-1014.4 Flexible pipe connections ............................................................................................................
15-115. Vibration and Noise ..............................................................................................................................
15-115.1 External forces and couples ........................................................................................................
15-215.2 Torque variations .........................................................................................................................
15-215.3 Mass moments of inertia .............................................................................................................
15-215.4 Air borne noise .............................................................................................................................
15-315.5 Exhaust noise ..............................................................................................................................
16-116. Power Transmission ............................................................................................................................
16-116.1 Flexible coupling ..........................................................................................................................
17-117. Engine Room Layout ...........................................................................................................................
17-117.1 Space requirements for maintenance .........................................................................................
17-117.2 Transportation and storage of spare parts and tools ..................................................................
17-217.3 Required deck area for service work ...........................................................................................
18-118. Transport Dimensions and Weights ...................................................................................................
18-118.1 Lifting of main engines ................................................................................................................
18-218.2 Lifting of generating sets .............................................................................................................
18-318.3 Engine components .....................................................................................................................
19-119. Product Guide Attachments ...............................................................................................................
20-120. ANNEX ...................................................................................................................................................
20-120.1 Unit conversion tables .................................................................................................................
20-220.2 Collection of drawing symbols used in drawings ........................................................................
Wärtsilä 31 Product Guide - a1 - 18 October 2016 v
Table of contentsWärtsilä 31 Product Guide
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1. Main Data and Outputs
The Wärtsilä 31 is a 4-stroke, non-reversible, turbocharged and intercooled diesel engine with
direct fuel injection.
310 mmCylinder bore ........................
430 mmStroke ...................................
2 inlet valves
2 exhaust valves
Number of valves .................
8, 10, 12, 14 and 16Cylinder configuration .........
50°V-angle .................................
Clockwise, counterclockwiseDirection of rotation .............
720, 750 rpmSpeed ...................................
10.32 - 10.75 m/sMean piston speed ...............
1.1 Maximum continuous output
Table 1-1 Rating table for Wärtsilä 31
Generating setsMain enginesCylinder
configuration 750 rpm720 rpm750 rpm
Generator [kVA]Engine [kW]Generator [kVA]Engine [kW][kW]
58564880566447204880W 8V31
73206100708059006100W 10V31
87847320849670807320W 12V31
102488540991282608540W 14V31
1171297601132894409760W 16V31
The mean effective pressure Pe can be calculated as follows:
where:
mean effective pressure [bar]Pe =
output per cylinder [kW]P =
engine speed [r/min]n =
cylinder diameter [mm]D =
length of piston stroke [mm]L =
operating cycle (4)c =
Wärtsilä 31 Product Guide - a1 - 18 October 2016 1-1
1. Main Data and OutputsWärtsilä 31 Product Guide
1.2 Reference conditions
The output is available up to a charge air coolant temperature of max. 38°C and an air
temperature of max. 45°C. For higher temperatures, the output has to be reduced according
to the formula stated in ISO 3046-1:2002 (E).
The specific fuel oil consumption is stated in the chapter Technical data. The stated specific
fuel oil consumption applies to engines with engine driven pumps, operating in ambient
conditions according to ISO 15550:2002 (E). The ISO standard reference conditions are:
100 kPatotal barometric pressure
25°Cair temperature
30%relative humidity
25°Ccharge air coolant temperature
Correction factors for the fuel oil consumption in other ambient conditions are given in standard
ISO 3046-1:2002.
1.3 Operation in inclined position
Max. inclination angles at which the engine will operate satisfactorily.
Table 1-2 Inclination with Normal Oil Sump
15°
●Transverse inclination, permanent (list)
22.5°
●Transverse inclination, momentary (roll)
10°
●Longitudinal inclination, permanent (trim)
10°
●Longitudinal inclination, momentary (pitch)
NOTE
Inclination in all directions requires special arrangements.
1-2 Wärtsilä 31 Product Guide - a1 - 18 October 2016
Wärtsilä 31 Product Guide1. Main Data and Outputs
1.4 Dimensions and weights
1.4.1 Main engines
Fig 1-1 Main engine dimensions (DAAF336230)
LE4LE2HE3HE4WE1*WE1HE1*HE1LE1LE1*Engine
35035601496650311331133205320561146175W8V31
35042001496650311331133205320567546813W10V31
Weight
ton**
WE2WE3LE5LE5*WE6WE6*LE3LE3*WESEngine
56.71650115350050067-67167516751582W8V31
621650115350050067-67167516751585W10V31
Total length of engineLE1
Height from the crankshaft centerline to the highest pointHE1
Total width of the engineWE1
Height from the crankshaft centerline to the engine feetsHE4
Dimension from the crankshaft centerline to the bottom of the oil sump, when shallow oil
sump
HE3
Length of the engine blockLE2
Dimension from the end of the block to the end of the crankshaftLE4
Width of the oil sumpWE3
Width of the engine block at the engine feetWE2
Dimension from the center of the crankshaft to the outermost point of the engineWE5
Dimension from the engine block to the outermost point in turbocharger endLE3
Dimension from the center of the crankshaft to the centre of the exhaust outletWE6
Dimension from the end of the engine block to the centre of the exhaust gas outletLE5
* Turbocharger at flywheel end
** Weight with liquids (wet sump) but without flywheel
All dimensions in mm.
Wärtsilä 31 Product Guide - a1 - 18 October 2016 1-3
1. Main Data and OutputsWärtsilä 31 Product Guide
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2. Operating Ranges
2.1 Engine operating range
Below nominal speed the load must be limited according to the diagrams in this chapter in
order to maintain engine operating parameters within acceptable limits. Operation in the
shaded area is permitted only temporarily during transients. Minimum speed is indicated in
the diagram, but project specific limitations may apply.
2.1.1 Controllable pitch propellers
The engine load must be limited according to the diagram below when operating below nominal
speed, in order to maintain engine operating parameters within acceptable limits. Operation
in the shaded area is permitted only temporarily during transients to permit smooth overload
control.
Note that project specific vibration calculations may result in higher minimum speed than in
the diagram below.
The propulsion control must also include automatic limitation of the load increase rate.
Maximum loading rates can be found later in this chapter.
The propeller efficiency is highest at design pitch. It is common practice to dimension the
propeller so that the specified ship speed is attained with design pitch, nominal engine speed
and 85% output in the specified loading condition. The power demand from a possible shaft
generator or PTO must be taken into account. The 15% margin is a provision for weather
conditions and fouling of hull and propeller. An additional engine margin can be applied for
most economical operation of the engine, or to have reserve power.
Fig 2-1 Operating field for CP Propeller
Wärtsilä 31 Product Guide - a1 - 18 October 2016 2-1
2. Operating RangesWärtsilä 31 Product Guide
2.2 Loading capacity
Controlled load increase is essential for highly supercharged diesel engines, because the
turbocharger needs time to accelerate before it can deliver the required amount of air. A slower
loading ramp than the maximum capability of the engine permits a more even temperature
distribution in engine components during transients.
The engine can be loaded immediately after start, provided that the engine is pre-heated to
a HT-water temperature of min 70ºC, and the lubricating oil temperature is min. 40 ºC.
The ramp for normal loading applies to engines that have reached normal operating
temperature.
2.2.1 Mechanical propulsion
Fig 2-2 Maximum recommended load increase rates for variable speed engines
The propulsion control must include automatic limitation of the load increase rate. If the control
system has only one load increase ramp, then the ramp for a preheated engine should be
used. In tug applications the engines have usually reached normal operating temperature
before the tug starts assisting. The “emergency” curve is close to the maximum capability of
the engine.
Large load reductions from high load should also be performed gradually. In normal operation
the load should not be reduced from 100% to 0% in less than 15 seconds. When absolutely
necessary, the load can be reduced as fast as the pitch setting system can react (overspeed
due to windmilling must be considered for high speed ships).
2-2 Wärtsilä 31 Product Guide - a1 - 18 October 2016
Wärtsilä 31 Product Guide2. Operating Ranges
2.2.2 Diesel electric propulsion and auxiliary engines
Fig 2-3 Maximum recommended load increase rates for engines operating at
nominal speed
In diesel electric installations loading ramps are implemented both in the propulsion control
and in the power management system, or in the engine speed control in case isochronous
load sharing is applied. If a ramp without knee-point is used, it should not achieve 100% load
in shorter time than the ramp in the figure. When the load sharing is based on speed droop,
the load increase rate of a recently connected generator is the sum of the load transfer
performed by the power management system and the load increase performed by the
propulsion control.
The “emergency” curve is close to the maximum capability of the engine and it shall not be
used as the normal limit. In dynamic positioning applications loading ramps corresponding to
20-30 seconds from zero to full load are however normal. If the vessel has also other operating
modes, a slower loading ramp is recommended for these operating modes.
In typical auxiliary engine applications there is usually no single consumer being decisive for
the loading rate. It is recommended to group electrical equipment so that the load is increased
in small increments, and the resulting loading rate roughly corresponds to the “normal” curve.
In normal operation the load should not be reduced from 100% to 0% in less than 15 seconds.
If the application requires frequent unloading at a significantly faster rate, special arrangements
can be necessary on the engine. In an emergency situation the full load can be thrown off
instantly.
2.2.2.1 Maximum instant load steps
The electrical system must be designed so that tripping of breakers can be safely handled.
This requires that the engines are protected from load steps exceeding their maximum load
acceptance capability. The load steps are in three equal steps. The resulting speed drop is
less than 10% and the recovery time to within 1% of the steady state speed at the new load
level is max. 5 seconds.
When electrical power is restored after a black-out, consumers are reconnected in groups,
which may cause significant load steps. The engine must be allowed to recover for at least
10 seconds before applying the following load step, if the load is applied in maximum steps.
2.2.2.2 Start-up time
A diesel generator typically reaches nominal speed in about 20 seconds after the start signal.
The acceleration is limited by the speed control to minimise smoke during start-up. If requested
faster starting times can be arranged.
Wärtsilä 31 Product Guide - a1 - 18 October 2016 2-3
2. Operating RangesWärtsilä 31 Product Guide
2.3 Operation at low load and idling
Table 2-1 Idling and low load operation restrictions
HFO, max continous
time [h]
LFO, max continous
time [h]
Load
10150%
10502%
20030017.5%
Fig 2-4 Low load operating restrictions
NOTE
Above 17.5% load there is no additional restriction from low load operation.1)
Duration of low load only applies if charge air temp in receiver is at:2)
- LFO: 35C or above
- HFO: 45C or above
High load running (minimum 70%) is to be followed for a minimum of 60 minutes to clean up the engine
after maximum allowed low load running time has been reached.
3)
2.4 Low air temperature
In cold conditions the following minimum inlet air temperatures apply:
●Min 5ºC
For lower suction air temperatures engines shall be configured for arctic operation.
For further guidelines, see chapter Combustion air system design.
2-4 Wärtsilä 31 Product Guide - a1 - 18 October 2016
Wärtsilä 31 Product Guide2. Operating Ranges
3. Technical Data
3.1 Wärtsilä 8V31
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
48804880472048804720kWEngine output
3.013.013.033.013.03MPaMean effective pressure
Combustion air system (Note 1)
8.638.638.328.638.32kg/sFlow at 100% load
4545454545°CTemperature at turbocharger intake, max.
6565656565°CAir temperature after air cooler (TE 601)
Exhaust gas system (Note 2)
8.888.888.568.888.56kg/sFlow at 100% load
7.527.67.287.67.28kg/sFlow at 85% load
6.486.86.566.86.56kg/sFlow at 75% load
4.565.24.965.24.96kg/sFlow at 50% load
273273275273275°CTemperature after turbocharger, 100% load (TE 517)
277275277275277°CTemperature after turbocharger, 85% load (TE 517)
295282284282284°CTemperature after turbocharger, 75% load (TE 517)
320286288286288°CTemperature after turbocharger, 50% load (TE 517)
5.05.05.05.05.0kPaBackpressure, max.
705705693705693
mmCalculated pipe diameter for 35m/s
Heat balance (Note 3)
494494460494460kWJacket water, HT-circuit
926926858926858kWCharge air, HT-circuit
12301230119512301195kWCharge air, LT-circuit
522522487522487kWLubricating oil, LT-circuit
137137131137131kWRadiation
For optional engineversions heat balances may differ
Fuel system (Note 4)
1000±1001000±1001000±1001000±1001000±100kPaPressure before injection pumps (PT 101)
60.060.060.060.060.0m3/hEngine driven pump capacity (MDF only)
16...2416...2416...2416...2416...24cStHFO viscosity before engine
140140140140140°CHFO temperature before engine, max. (TE 101)
2.02.02.02.02.0cStMDF viscosity, min
4545454545°CMDF temperature before engine, max. (TE 101)
174.4174.9173.9174.4173.4
g/kWhFuel consumption at 100% load, HFO
171.6172.0171.1171.6170.6
g/kWhFuel consumption at 85% load, HFO
171.6174.0173.0173.5172.5
g/kWhFuel consumption at 75% load, HFO
178.5183.8182.8183.3182.3
g/kWhFuel consumption at 50% load, HFO
Wärtsilä 31 Product Guide - a1 - 18 October 2016 3-1
3. Technical DataWärtsilä 31 Product Guide
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
173.5174.0173.0173.5172.5
g/kWhFuel consumption at 100% load, MDF
170.6171.1170.1170.6169.7
g/kWhFuel consumption at 85% load, MDF
170.6173.0172.0172.5171.6
g/kWhFuel consumption at 75% load, MDF
176.6181.9180.9181.4180.4
g/kWhFuel consumption at 50% load, MDF
17.717.717.017.717.0
kg/hClean leak fuel quantity, MDF at 100% load
3.63.63.43.63.4
kg/hClean leak fuel quantity, HFO at 100% load
Lubricating oil system
420420420420420
kPaPressure before bearings, nom. (PT 201)
4040404040
kPaSuction ability main pump, including pipe loss, max.
6060606060
kPaPriming pressure, nom. (PT 201)
3535353535
kPaSuction ability priming pump, including pipe loss, max.
7070707070
°CTemperature before bearings, nom. (TE 201)
8282828282
°CTemperature after engine, approx.
144130125130125
m³/hPump capacity (main), engine driven
100100100100100
m³/hPump capacity (main), stand-by
20.0 / 20.020.0 / 20.020.0 / 20.020.0 / 20.020.0 / 20.0m³/hPriming pump capacity, 50Hz/60Hz
2.542.542.542.542.54
m³Oil volume, wet sump, nom.
6.66.66.46.66.4
m³Oil volume in separate system oil tank, nom.
0.450.450.450.450.45
g/kWhOil consumption (100% load), approx.
19601960196019601960l/minCrankcase ventilation flow rate at full load
0.10.10.10.10.1kPaCrankcase ventilation backpressure, max.
6.0...6.86.0...6.86.0...6.86.0...6.86.0...6.8litersOil volume in turning device
Cooling water system
High temperature cooling water system
358 + stat-
ic
358 + stat-
ic
358 + stat-
ic
358 + stat-
ic
358 + stat-
ic
kPaPressure at engine, after pump, nom. (PT 401)
600600600600600
kPaPressure at engine, after pump, max. (PT 401)
8383838383
°CTemperature before cylinders, approx. (TE 401)
9696969696°CHT-water out from engine, nom (TE432)
8080808080
m³/hCapacity of engine driven pump, nom.
210210210210210kPaPressure drop over engine, total
100100100100100
kPaPressure drop in external system, max.
70...15070...15070...15070...15070...150kPaPressure from expansion tank
0.6030.6030.6030.6030.603
m³Water volume in engine
Low temperature cooling water system
25 ... 3825 ... 3825 ... 3825 ... 3825 ... 38°CTemperature before engine (TE 451)
8080808080
m³/hCapacity of engine driven pump, nom.
4141414141
kPaPressure drop over charge air cooler (one-stage)
3-2 Wärtsilä 31 Product Guide - a1 - 18 October 2016
Wärtsilä 31 Product Guide3. Technical Data
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
110110110110110
kPaPressure drop over charge air cooler (two-stage)
115115115115115
kPaPressure drop over oil cooler
100100100100100
kPaPressure drop in external system, max.
70 ... 15070 ... 15070 ... 15070 ... 15070 ... 150kPaPressure from expansion tank
Starting air system
30003000300030003000
kPaPressure, nom.
15001500150015001500
kPaPressure at engine during start, min. (20°C)
30003000300030003000
kPaPressure, max.
16001600160016001600
kPaLow pressure limit in air vessels
4.94.94.94.94.9
Nm3
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 DataWärtsilä 31 Product Guide
3.2 Wärtsilä 10V31
ME
IMO Tier 2
AUX
IMO Tier 2
AUX
IMO Tier 2
DE
IMO Tier 2
DE
IMO Tier 2
Wärtsilä 10V31
750
610
750
610
720
590
750
610
720
590
RPM
kW/cyl
Engine speed
Cylinder output
61006100590061005900kWEngine output
3.013.013.033.013.03MPaMean effective pressure
Combustion air system (Note 1)
10.7910.7910.410.7910.4kg/sFlow at 100% load
4545454545°CTemperature at turbocharger intake, max.
6565656565°CAir temperature after air cooler (TE 601)
Exhaust gas system (Note 2)
11.111.110.711.110.7kg/sFlow at 100% load
9.49.59.19.59.1kg/sFlow at 85% load
8.18.58.28.58.2kg/sFlow at 75% load
5.76.56.26.56.2kg/sFlow at 50% load
273273275273275°CTemperature after turbocharger, 100% load (TE 517)
277275277275277°CTemperature after turbocharger, 85% load (TE 517)
295282284282284°CTemperature after turbocharger, 75% load (TE 517)
320286288286288°CTemperature after turbocharger, 50% load (TE 517)
5.05.05.05.05.0kPaBackpressure, max.
788788775788775
mmCalculated pipe diameter for 35m/s
Heat balance (Note 3)
618618575618575kWJacket water, HT-circuit
11571157107311571073kWCharge air, HT-circuit
15371537149415371494kWCharge air, LT-circuit
653653609653609kWLubricating oil, LT-circuit
171171164171164kWRadiation
For optional engineversions heat balances may differ
Fuel system (Note 4)
1000±1001000±1001000±1001000±1001000±100kPaPressure before injection pumps (PT 101)
60.060.060.060.060.0m3/hEngine driven pump capacity (MDF only)
16...2416...2416...2416...2416...24cStHFO viscosity before engine
140140140140140°CHFO temperature before engine, max. (TE 101)
2.02.02.02.02.0cStMDF viscosity, min
4545454545°CMDF temperature before engine, max. (TE 101)
174.4174.9174.0174.4173.5
g/kWhFuel consumption at 100% load, HFO
171.6172.0171.1171.6170.6
g/kWhFuel consumption at 85% load, HFO
171.6174.0173.0173.5172.5
g/kWhFuel consumption at 75% load, HFO
178.5183.8182.8183.3182.3
g/kWhFuel consumption at 50% load, HFO
173.5174.0173.0173.5172.5
g/kWhFuel consumption at 100% load, MDF
170.6171.1170.1170.6169.7
g/kWhFuel consumption at 85% load, MDF
170.6173.0172.0172.5171.6
g/kWhFuel consumption at 75% load, MDF
3-4 Wärtsilä 31 Product Guide - a1 - 18 October 2016
Wärtsilä 31 Product Guide3. Technical Data
ME
IMO Tier 2
AUX
IMO Tier 2
AUX
IMO Tier 2
DE
IMO Tier 2
DE
IMO Tier 2
Wärtsilä 10V31
750
610
750
610
720
590
750
610
720
590
RPM
kW/cyl
Engine speed
Cylinder output
176.6181.9180.9181.4180.4
g/kWhFuel consumption at 50% load, MDF
22.122.121.322.121.2
kg/hClean leak fuel quantity, MDF at 100% load
4.44.54.34.44.3
kg/hClean leak fuel quantity, HFO at 100% load
Lubricating oil system
420420420420420
kPaPressure before bearings, nom. (PT 201)
4040404040
kPaSuction ability main pump, including pipe loss, max.
6060606060
kPaPriming pressure, nom. (PT 201)
3535353535
kPaSuction ability priming pump, including pipe loss, max.
7070707070
°CTemperature before bearings, nom. (TE 201)
8282828282
°CTemperature after engine, approx.
144130125130125
m³/hPump capacity (main), engine driven
120120120120120
m³/hPump capacity (main), stand-by
24.0 / 24.024.0 / 24.024.0 / 24.024.0 / 24.024.0 / 24.0m³/hPriming pump capacity, 50Hz/60Hz
3.03.03.03.03.0
m³Oil volume, wet sump, nom.
8.28.28.08.28.0
m³Oil volume in separate system oil tank, nom.
0.450.450.450.450.45
g/kWhOil consumption (100% load), approx.
24502450245024502450l/minCrankcase ventilation flow rate at full load
0.10.10.10.10.1kPaCrankcase ventilation backpressure, max.
6.0...6.86.0...6.86.0...6.86.0...6.86.0...6.8litersOil volume in turning device
Cooling water system
High temperature cooling water system
382 + stat-
ic
382 + stat-
ic
382 + stat-
ic
382 + stat-
ic
382 + stat-
ic
kPaPressure at engine, after pump, nom. (PT 401)
600600600600600
kPaPressure at engine, after pump, max. (PT 401)
8383838383
°CTemperature before cylinders, approx. (TE 401)
9696969696°CHT-water out from engine, nom (TE432)
9090909090
m³/hCapacity of engine driven pump, nom.
210210210210210kPaPressure drop over engine, total
100100100100100
kPaPressure drop in external system, max.
70...15070...15070...15070...15070...150kPaPressure from expansion tank
0.6420.6420.6420.6420.642
m³Water volume in engine
Low temperature cooling water system
25 ... 3825 ... 3825 ... 3825 ... 3825 ... 38°CTemperature before engine (TE 451)
9090909090
m³/hCapacity of engine driven pump, nom.
00000
kPaPressure drop over charge air cooler
4141414141
kPaPressure drop over charge air cooler (one-stage)
110110110110110
kPaPressure drop over charge air cooler (two-stage)
100100100100100
kPaPressure drop in external system, max.
Wärtsilä 31 Product Guide - a1 - 18 October 2016 3-5
3. Technical DataWärtsilä 31 Product Guide
ME
IMO Tier 2
AUX
IMO Tier 2
AUX
IMO Tier 2
DE
IMO Tier 2
DE
IMO Tier 2
Wärtsilä 10V31
750
610
750
610
720
590
750
610
720
590
RPM
kW/cyl
Engine speed
Cylinder output
70 ... 15070 ... 15070 ... 15070 ... 15070 ... 150kPaPressure from expansion tank
Starting air system
30003000300030003000
kPaPressure, nom.
15001500150015001500
kPaPressure at engine during start, min. (20°C)
30003000300030003000
kPaPressure, max.
16001600160016001600
kPaLow pressure limit in air vessels
5.15.15.15.15.1
Nm3
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.
3-6 Wärtsilä 31 Product Guide - a1 - 18 October 2016
Wärtsilä 31 Product Guide3. Technical Data
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