WÄRTSILÄ WARTSILA 20 Manuale utente
WÄRTSILÄ 20
PRODUCT GUIDE
© Copyright by WÄRTSILÄ FINLAND OY
All rights reserved. No part of this booklet may be reproduced or copied in any form or by any means (electronic,
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THIS PUBLICATION IS DESIGNED TO PROVIDE AN ACCURATE AND AUTHORITATIVE INFORMATION WITH
REGARD TO THE SUBJECT-MATTER COVERED AS WAS AVAILABLE AT THE TIME OF PRINTING. HOWEVER,THE
PUBLICATION DEALS WITH COMPLICATED TECHNICAL MATTERS SUITED ONLY FOR SPECIALISTS IN THE
AREA, AND THE DESIGN OF THE SUBJECT-PRODUCTS IS SUBJECT TO REGULAR IMPROVEMENTS,
MODIFICATIONS AND CHANGES. CONSEQUENTLY, THE PUBLISHER AND COPYRIGHT OWNER OF THIS
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IN THE RESPECTIVE PRODUCT BEING DIFFERENT FROM THOSE SHOWN IN THIS PUBLICATION. THE PUBLISHER
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CONSEQUENTIAL DAMAGES OR OTHER LOSS, OR ANY OTHER DAMAGE OR INJURY, SUFFERED BY ANY
PARTY MAKING USE OF THIS PUBLICATION OR THE INFORMATION CONTAINED HEREIN.
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 1/2016 issue replaces all previous issues of the Wärtsilä 20 Project Guides.
UpdatesPublishedIssue
Technical data section updated06.09.20161/2016
Numerous updates throughout the product guide14.10.20151/2015
Chapters Fuel Oil System and Lubrication Oil System updated with low sulphur
operation, several other updates throughout the product guide.
19.04.20131/2013
Chapters Technical Data and Lubricating Oil System updated19.11.20093/2009
Wärtsilä, Marine Solutions
Vaasa, October 2016
Wärtsilä 20 Product Guide - a13 - 6 September 2016 iii
IntroductionWärtsilä 20 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 modes ..............................................................................................................
2-12.2 Engine operating range ...............................................................................................................
2-32.3 Loading capacity .........................................................................................................................
2-62.4 Operation at low load and idling ..................................................................................................
2-62.5 Low air temperature ....................................................................................................................
3-13. Technical Data ......................................................................................................................................
3-13.1 Wärtsilä 4L20 ...............................................................................................................................
3-43.2 Wärtsilä 6L20 ...............................................................................................................................
3-73.3 Wärtsilä 8L20 ...............................................................................................................................
3-103.4 Wärtsilä 9L20 ...............................................................................................................................
4-14. Description of the Engine ....................................................................................................................
4-14.1 Definitions ....................................................................................................................................
4-14.2 Main components and systems ..................................................................................................
4-44.3 Cross sections of the engine .......................................................................................................
4-54.4 Overhaul intervals and expected lifetimes ...................................................................................
4-54.5 Engine storage .............................................................................................................................
5-15. Piping Design, Treatment and Installation .........................................................................................
5-15.1 Pipe dimensions ..........................................................................................................................
5-25.2 Trace heating ...............................................................................................................................
5-25.3 Operating and design pressure ...................................................................................................
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 ...................................................................................................
6-76.2 Internal fuel oil system .................................................................................................................
6-106.3 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 ......................................................................................................
7-127.5 Flushing instructions ....................................................................................................................
8-18. Compressed Air System ......................................................................................................................
8-18.1 Internal compressed air system ..................................................................................................
8-38.2 External compressed air system .................................................................................................
iv Wärtsilä 20 Product Guide - a13 - 6 September 2016
Wärtsilä 20 Product GuideTable of contents
9-19. Cooling Water System .........................................................................................................................
9-19.1 Water quality ...............................................................................................................................
9-29.2 Internal cooling water system ......................................................................................................
9-59.3 External cooling water system ....................................................................................................
10-110. Combustion Air System .......................................................................................................................
10-110.1 Engine room ventilation ...............................................................................................................
10-310.2 Combustion air system design ....................................................................................................
11-111. Exhaust Gas System ............................................................................................................................
11-111.1 Internal exhaust gas system ........................................................................................................
11-211.2 Exhaust gas outlet .......................................................................................................................
11-311.3 External exhaust gas system .......................................................................................................
12-112. Turbocharger Cleaning ........................................................................................................................
12-112.1 Turbine cleaning system ..............................................................................................................
12-112.2 Compressor cleaning system ......................................................................................................
13-113. Exhaust Emissions ...............................................................................................................................
13-113.1 Diesel engine exhaust components ............................................................................................
13-213.2 Marine exhaust emissions legislation ..........................................................................................
13-613.3 Methods to reduce exhaust emissions ........................................................................................
14-114. Automation System .............................................................................................................................
14-114.1 UNIC C2 .......................................................................................................................................
14-614.2 Functions ....................................................................................................................................
14-814.3 Alarm and monitoring signals ......................................................................................................
14-814.4 Electrical consumers ...................................................................................................................
15-115. Foundation ............................................................................................................................................
15-115.1 Steel structure design ..................................................................................................................
15-115.2 Mounting of main engines ...........................................................................................................
15-615.3 Mounting of generating sets ........................................................................................................
15-815.4 Flexible pipe connections ............................................................................................................
16-116. Vibration and Noise ..............................................................................................................................
16-116.1 External forces and couples ........................................................................................................
16-216.2 Torque variations .........................................................................................................................
16-216.3 Mass moments of inertia .............................................................................................................
16-316.4 Structure borne noise ..................................................................................................................
16-416.5 Air borne noise .............................................................................................................................
16-416.6 Exhaust noise ..............................................................................................................................
17-117. Power Transmission ............................................................................................................................
17-117.1 Flexible coupling ..........................................................................................................................
17-217.2 Clutch ..........................................................................................................................................
17-217.3 Shaft locking device ....................................................................................................................
17-317.4 Power-take-off from the free end ................................................................................................
17-417.5 Input data for torsional vibration calculations .............................................................................
17-517.6 Turning gear .................................................................................................................................
18-118. Engine Room Layout ...........................................................................................................................
18-118.1 Crankshaft distances ...................................................................................................................
18-218.2 Space requirements for maintenance .........................................................................................
18-218.3 Transportation and storage of spare parts and tools ..................................................................
18-318.4 Required deck area for service work ...........................................................................................
Wärtsilä 20 Product Guide - a13 - 6 September 2016 v
Table of contentsWärtsilä 20 Product Guide
19-119. Transport Dimensions and Weights ...................................................................................................
19-119.1 Lifting of engines .........................................................................................................................
19-319.2 Engine components .....................................................................................................................
20-120. Product Guide Attachments ...............................................................................................................
21-121. ANNEX ...................................................................................................................................................
21-121.1 Unit conversion tables .................................................................................................................
21-221.2 Collection of drawing symbols used in drawings ........................................................................
vi Wärtsilä 20 Product Guide - a13 - 6 September 2016
Wärtsilä 20 Product GuideTable of contents
1. Main Data and Outputs
The Wärtsilä 20 is a 4-stroke, non-reversible, turbocharged and intercooled diesel engine with
direct injection of fuel.
200 mmCylinder bore ........................................
280 mmStroke ....................................................
8.8 l/cylPiston displacement .............................
2 inlet valves and 2 exhaust valvesNumber of valves ..................................
4, 6, 8, 9, in-lineCylinder configuration ...........................
Clockwise, counterclockwise on requestDirection of rotation ..............................
900, 1000 rpmSpeed ....................................................
8.4, 9.3 m/sMean piston speed ...............................
1.1 Maximum continuous output
Table 1-1 Rating table for Wärtsilä 20
Generating setsMain enginesCylinder
configuration 1000 rpm / 50 Hz900 rpm / 60 Hz1000 rpm
Generator
[kVA]
Engine
[kW]
Generator
[kVA]
Engine
[kW]
bhpkW
9508008807401080800W 4L20
142012001320111016301200W 6L20
190016001760148021701600W 8L20
214018001980166524401800W 9L20
The mean effective pressure pecan 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 20 Product Guide - a13 - 6 September 2016 1-1
1. Main Data and OutputsWärtsilä 20 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.
15°Transverse inclination, permanent (list) ........
22.5°Transverse inclination, momentary (roll) .......
10°Longitudinal inclination, permanent (trim) .....
10°Longitudinal inclination, momentary (pitch) ...
1-2 Wärtsilä 20 Product Guide - a13 - 6 September 2016
Wärtsilä 20 Product Guide1. Main Data and Outputs
1.4 Dimensions and weights
Fig 1-1 Main engines (3V92E0068c)
KIHGF2F1EDCC*BB*AA*Engine
98071815514807257253251800148313482510W 4L20
98071815520808246243251800157915801348152831083292W 6L20
98071815526808246243251800171317561465161437834011W 8L20
98071815529808246243251800171317561449161440764299W 9L20
F1 for dry sump and F2 for deep wet sump
WeightTT*SS*RR*PP*NN*MM*Engine
7.2349694248920665854W 4L20
9.33432667637623283289711200663589950951W 6L20
11.03393298639073903901000122473870810841127W 8L20
11.63393298639073903901000122473169610841127W 9L20
* Turbocharger at flywheel end
Dimensions in mm. Weight in tons.
Wärtsilä 20 Product Guide - a13 - 6 September 2016 1-3
1. Main Data and OutputsWärtsilä 20 Product Guide
Fig 1-2 Generating sets (3V58E0576d)
Weight
*
ML*K*IH*G*F*E*D*C*BA*Engine
14.0116823381580/173018001770/19201270/1420990725246040506654910W 4L20
16.812992243/2323/23731580/1730/188018001770/1920/20701270/1420/1570895/975/1025725230045756635325W 6L20
20.713902474/25241730/188018001920/20701420/15701025/1075725231051007316030W 8L20
23.813902524/25741880/211018002070/23001570/18001075/1125725258054007316535W 9L20
* Dependent on generator type and size.
Dimensions in mm. Weight in tons.
1-4 Wärtsilä 20 Product Guide - a13 - 6 September 2016
Wärtsilä 20 Product Guide1. Main Data and Outputs
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