Wartsila ?31DF Series Manuel utilisateur

PRODUCT GUIDE

Wärtsilä 31DF

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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. This 01/2019 issue

replaces all previous issues of the Wärtsilä 31DF Project Guides.

Wärtsilä, Marine Solutions

Vaasa, March 2019

DBAE248994 iii

IntroductionWärtsilä 31DF Product Guide

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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 (only for Marine Solutions engines) ......................................................

1-31.4 Dimensions and weights .....................................................................................................................

2-12. Operating Ranges ....................................................................................................................................

2-12.1 Engine operating range ........................................................................................................................

2-22.2 Loading capacity ..................................................................................................................................

2-82.3 Low load operation ...............................................................................................................................

2-102.4 Low air temperature ............................................................................................................................

3-13. Technical Data ..........................................................................................................................................

3-13.1 Introduction ..........................................................................................................................................

3-33.2 Wärtsilä 8V31DF ...................................................................................................................................

3-113.3 Wärtsilä 10V31DF .................................................................................................................................

3-193.4 Wärtsilä 12V31DF .................................................................................................................................

3-273.5 Wärtsilä 14V31DF .................................................................................................................................

3-353.6 Wärtsilä 16V31DF .................................................................................................................................

4-14. Description of the Engine ........................................................................................................................

4-14.1 Definitions .............................................................................................................................................

4-14.2 Main components and systems ...........................................................................................................

4-64.3 Time between Inspection or Overhaul & Expected Life Time ..............................................................

4-74.4 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 ............................................................................................................................

5-65.8 Flexible pipe connections .....................................................................................................................

5-85.9 Clamping of pipes ................................................................................................................................

6-16. Fuel Oil System .........................................................................................................................................

6-16.1 Acceptable fuel characteristics ............................................................................................................

6-96.2 Operating principles .............................................................................................................................

6-106.3 Fuel gas system ...................................................................................................................................

6-186.4 External fuel oil system ........................................................................................................................

7-17. Lubricating Oil System ............................................................................................................................

7-17.1 Lubricating oil requirements .................................................................................................................

7-27.2 External lubricating oil system .............................................................................................................

7-87.3 Crankcase ventilation system .............................................................................................................

7-107.4 Flushing instructions ............................................................................................................................

8-18. Compressed Air System ..........................................................................................................................

8-18.1 Instrument air quality ............................................................................................................................

8-18.2 External compressed air system ..........................................................................................................

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Table of contentsWärtsilä 31DF Product Guide

9-19. Cooling Water System .............................................................................................................................

9-19.1 Water quality ........................................................................................................................................

9-29.2 External cooling water system .............................................................................................................

10-110. Combustion Air System .........................................................................................................................

10-110.1 Engine room ventilation ......................................................................................................................

10-210.2 Combustion air system design ...........................................................................................................

11-111. Exhaust Gas System ..............................................................................................................................

11-111.1 Exhaust gas outlet ..............................................................................................................................

11-311.2 External exhaust gas system .............................................................................................................

12-112. Turbocharger Cleaning ..........................................................................................................................

12-112.1 Turbine cleaning system .....................................................................................................................

12-212.2 Compressor cleaning system .............................................................................................................

13-113. Exhaust Emissions .................................................................................................................................

13-113.1 Dual fuel engine exhaust components ...............................................................................................

13-113.2 Marine exhaust emissions legislation .................................................................................................

13-113.3 Methods to reduce exhaust emissions ..............................................................................................

14-114. Automation System ................................................................................................................................

14-114.1 Technical data and system overview .................................................................................................

14-714.2 Functions ...........................................................................................................................................

14-1114.3 Alarm and monitoring signals .............................................................................................................

14-1114.4 Electrical consumers ..........................................................................................................................

14-1314.5 System requirements and guidelines for diesel-electric propulsion ..................................................

15-115. Foundation ..............................................................................................................................................

15-115.1 Steel structure design ........................................................................................................................

15-115.2 Mounting of main engines ..................................................................................................................

15-415.3 Mounting of generating sets ..............................................................................................................

15-515.4 Flexible pipe connections ...................................................................................................................

16-116. Vibration and Noise ................................................................................................................................

16-116.1 External forces & couples ...................................................................................................................

16-416.2 Mass moments of inertia ....................................................................................................................

16-416.3 Air borne noise ...................................................................................................................................

16-416.4 Exhaust noise .....................................................................................................................................

17-117. Power Transmission ...............................................................................................................................

17-117.1 Flexible coupling ................................................................................................................................

17-117.2 Torque flange ......................................................................................................................................

17-117.3 Clutch .................................................................................................................................................

17-117.4 Shaft locking device ...........................................................................................................................

17-217.5 Input data for torsional vibration calculations ....................................................................................

17-317.6 Turning gear ........................................................................................................................................

18-118. Engine Room Layout ..............................................................................................................................

18-118.1 Crankshaft distances ..........................................................................................................................

18-518.2 Space requirements for maintenance ................................................................................................

18-518.3 Transportation and storage of spare parts and tools .........................................................................

18-518.4 Required deck area for service work ..................................................................................................

19-119. Transport Dimensions and Weights .....................................................................................................

19-119.1 Lifting of main engines .......................................................................................................................

19-219.2 Lifting of generating sets ....................................................................................................................

19-319.3 Engine components ...........................................................................................................................

vi DBAE248994

Wärtsilä 31DF Product GuideTable of contents

20-120. Product Guide Attachments ..................................................................................................................

21-121. ANNEX .....................................................................................................................................................

21-121.1 Unit conversion tables ........................................................................................................................

21-221.2 Collection of drawing symbols used in drawings ...............................................................................

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Table of contentsWärtsilä 31DF Product Guide

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1. Main Data and Outputs

The Wärtsilä 31DF 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 valvesNumber 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 31DF

Generating setsMain enginesCylinder

configuration 750 rpm720 rpm750 rpm

Generator [kVA]Engine [kW]Generator [kVA]Engine [kW][kW]

52804400509042404400W 8V31DF

66005500636053005500W 10V31DF

79206600763063606600W 12V31DF

92407700890074207700W 14V31DF

1056088001018084808800W 16V31DF

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 =

DBAE248994 1-1

1. Main Data and OutputsWärtsilä 31DF Product Guide

1.2 Reference conditions

The output is available within a range of ambient conditions and coolant temperatures specified

in the chapter Technical Data. The required fuel quality for maximum output is specified in the

section Fuel characteristics. For ambient conditions or fuel qualities outside the specification,

the output may have to be reduced.

The specific fuel consumption is stated in the chapter Technical Data. The statement applies

to engines operating in ambient conditions according to ISO 15550:2002 (E).

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 15550:2002 (E).

1.3 Operation in inclined position (only for Marine Solutions

engines)

The engine is designed to ensure proper engine operation at inclination positions. Inclination

angle according to IACS requirement M46.2 (1982) (Rev.1 June 2002) - Main and auxiliary

machinery.

Max. inclination angles at which the engine will operate satisfactorily:

Table 1-2 Inclination with Normal Oil Sump

15°

●Permanent athwart ship inclinations (list)

22.5°

●Temporary athwart ship inclinations (roll)

10°

●Permanent fore and aft inclinations (trim)

10°

●Temporary fore and aft inclinations (pitch)

1-2 DBAE248994

Wärtsilä 31DF Product Guide1. Main Data and Outputs

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