1.

1 Main Engine (s)

1.1.1 Wärtsilä 9L20
Application
Engine driving a generator at consent speed

Main particulars
Max continuous rating (MCR) 1665kW
Speed 900rpm
Configuration In-line engine
Number of cylinders 9
Cylinder bore 200mm
Stroke 280mm
Swept volume per cylinder 8.8dm³
Mean piston speed 8.4m/s
Mean effective pressure 28 bar
Direction of rotation, looking at driving end Clockwise

The max continuous rating (MCR) is valid at ambient conditions mentioned above.

Fuel oil consumption (SFOC)

Fuel consumption at shaft according to ISO 3046/1 without engine driven pumps
using MDF and corrected to a net calorific value of 42,700 kJ/kg:
85% load 188 g/kWh
Tolerance +5 %

Lubricating oil consumption

85% max 0.5 g/kWh
Lubricating oil consumption does not include treatment losses or oil changes

NOx Emissions
The standard engine complies with the maximum permissible NOx emission
according to the MARPOL 73/78 ANNEX VI Tier II NOx emission standard

Testing
The engine will be tested at the max continuous rating (MCR) in our workshop in
accordance with the requirements of the classification society and our own standard
specification. The fuel oil used during the test run is MDF. After test run the fuel rack
position will be limited to 110% MCR.

Engine specification
The engine is a four-stroke, turbocharged and intercooled diesel engine. The
following equipment is mounted on the engine:-
Fuel system
- One injection pump per cylinder
- Direct driven fuel feed pump with built-in safety valve, with stand by
connection
- Fuel fine filter of duplex type equipped with a differential pressure alarm
switch. The filter inserts can be exchanged with engine running
- Spring loaded control valve in the return pipe

Lubricating oil system

- Direct driven lubricating oil pump with built-in safety valve and pressure
regulating valve, without stand-by connections
- Electric motor driven pre-lubricating oil pump with built-in safety valve
- Automatic lubricating oil filter of back flushing type equipped with a
differential pressure sensor
- Centrifugal filter mounted in the by-pass line
- Lubricating oil cooler of plate type
- Lubricating oil thermostatic valve
- Wet oil sump
- Separator connections including shut off valves

Starting air system

- Starting air motor with pressure reducing and safety valve
- Starting air master valve
- Blocking valve for turning gear
- Control air container
- Non-return valve

Cooling water system

- Engine driven HT-cooling water pump without stand-by connection
- HT thermostatic valve, direct acting type
- Adjustable orifice in HT by-pass line
- Engine driven LT-cooling water pump without stand-by connection
- LT thermostatic valve, direct acting type
- Adjustable orifice in LT by-pass line

Combustion air and exhaust gas system

- Turbocharger(s) with air filter and silencer at free end of engine
- Exhaust gas outlet(s) orientation, 0° from vertical
- Single stage charge air cooler(s)
- Connection(s) for cleaning device of turbine
- Cleaning device for compressor(s), manually opened
- Air waste gate
- Variable inlet valve closing system
 Control and monitoring equipment on engine
- Fuel rack actuator for electronic speed control
- Two speed pickups for electronic speed control
- Electro-pneumatic shutdown system independent of the governor
- Microprocessor based distributed real time system for engine control and
monitoring

Main components:-
- Engine safety module for shutdown of engine acc. to class
requirements
- Main control module for internal engine control functions
- Input/output modules for handling of sensor data

Main functions:-
- Shutdown (e.g. lubricating oil pressure, overspeed)
- Start blockings (e.g. lubricating oil pressure, turning gear)
- Measuring of engine and turbocharger speed
- Normal start and stop of the engine
- Engine speed control
- Other internal engine control functions as applicable
- Signal processing of engine monitoring and alarm sensors
- Data communication with ships alarm & monitoring system through
Ethernet Modbus TCP or RS-485 serial link Modbus RTU
- Hardwired interface with external systems for control functions such
as remote start and stop

Operator interface
The operators interface is based on a local control panel (LCP) built on the engine,
consisting of a display unit, backup indications and control switches & buttons.

The local display unit shows all engine measurements (e.g. temperatures and
pressures) and provides various engine status indications as well as an event history

The following independent back up indications are available:

- Engine rpm
- Turbocharger rpm
- Running hours
- HT water temperature
- Lubricating oil pressure
The LCP is equipped with the following control switches and pushbuttons:
- BLOW/BLOCKED/LOCAL/REMOTE control mode switches
- Local START/STOP pushbuttons
- Trip/Shutdown RESET pushbuttons
- Emergency stop pushbuttons

Sensors
- Alarm, safety and measuring sensors according to maker and class requirements
- Connections for testing of pressure sensors
- Sensors are wired to the engine mounted I/O- and control modules

Miscellaneous
- Flywheel with a gear rim for turning
- Manual turning device
- Crankcase explosion valves
- Indicator valve in each cylinder head
- Nameplates in English
- Counter flanges, gaskets, bolts and nuts
- Torsional vibration damper or tuning mass in case needed

Painting
- The generating set will be painted with factory standard colour RAL 5019 Capri
Blue]

1.2 Fuel Oil Systems

1.2.1 Suction strainer (MDF)
Duplex filter with differential pressure indicator with alarm contact. The inserts can
be exchanged with engine running.

1.2.2 Cooler (MDF)

Fuel oil cooler of tube type
- Counter flanges, gaskets, bolts and nuts

1.3 Compressed Air Systems

1.3.1 Starting air vessel
The total air volume of the starting air vessels are calculated for 12 starts.

Starting air vessel (0.500m³) for Vertical mounting with:-

- Valve head assembly with inlet, outlet, drain and safety valves
- Counter flanges, gaskets, bolts and nuts
Starting air vessel size to be confirmed by customer, since the approval discussions
are carried out between system designer and classification society.
1.3.2 Air filter (starting air inlet)
- Engine built air equipment protection strainer

1.4 Cooling water systems

1.4.1 Preheating unit
HT cooling water preheating unit with:
- Electric heater
- Circulating pump
- Control cabinet for heater and pump
- The unit is dimensioned to warm up the engine(s) from 20°C to 60°C in 10-15 hours,
excluding losses in the external system
- The unit is dimensioned for 2 engine(s)

1.5 Combustion air and exhaust gas systems

1.5.1 Turbocharger cleaning device
Turbocharger water cleaning device for turbocharger turbine side:
- Dosing unit
- 10 meter hose with quick couplings

1.5.2 Exhaust gas bellows

Flexible expansion bellows after turbocharger
- Counter flanges, gaskets, bolts and nuts

1.5.3 Exhaust gas silencer with spark arrestor

Uninsulated exhaust gas silencer with spark arrestor with approximately 35 dB(A)
noise reduction

1.6 Control and monitoring systems

1.6.1 Power unit
Power unit for supply of isolated and duplicated 24VDC to the engine
Cabinet for bulkhead mounting, protection degree: 1P44

Main Components
- 230VAC/24VDC power supply converter
- 24VDC/24VDC power supply converter
- Miniature Circuit Breakers (MCBs) and terminals
The converters are dimensioned for 100% load and redundant. Failure of one supply
will cause automatic takeover by the second supply.
Required power supply from ship’s systems:
- Supply 1: 230VAC / abt. 150W
- Supply 2: 24VDC / abt. 150W
At least one of these must be connected to UPS or battery backup on ship’s side

1.7 Electric Moto Starters

1.7.1 Starters for electric motor driven pumps
Motor starters included:
- Engine built on pre lubricating oil pumps (4pcs)
Features of the starters:
- Local start and stop control
- Standby-, remote- or automatic mode as applicable

1.8 Foundation
1.8.1 Flexible pipe connections spare set
Spare set of flexible hoses including one for each type of pipe connections on
engine(s)

1.8.2 Flexible pipe connections

Flexible hoses for the pipe connections on engine(s)

1.8.3 Common base frame

Foundation for the engine and the alternator:
- Common base frame of welded steel
- Flexible mounts for common base frame
- The generator and engine will be mounted on the common base frame at our
factory
- Alternator fittings materials are included
- Flywheel cover between engine and alternator

1.9 Power transmission

1.9.1 Flexible coupling (flywheel)
The final choice of flexible coupling will be based on the torsional vibration
calculations (made after the order).
Bolts for connecting the coupling to the flywheel

1.9.2 Generator 9L20

Brushless 3-phrase synchronous alternator for marine installation with separate or
built-in automatic voltage regulator
Output 2000 kVA
Speed 900 rpm
Frequency 60 Hz
Voltage 690 V
Cos.phi 0.8
Insulation/temperature rise H/F
Bearings Antifriction
Enclosure IP 44
Mounting IM1101

Construction
The frame and the end shields are of welded or cast construction, treated with
primer for protection against corrosion. The outer surfaces are treated at the factory
with paint finish. The rotors are designed to withstand the vibration caused by the
prime mover and the stresses appearing at 120% rated speed

Water cooling
The generator is cooled with a shaft mounted fan. The cooling air is circulated inside
the generator through a double tube air-to-water heat exchanger

Antifriction bearings
Antifriction bearings are standard grease lubricated bearings

Brushless excitation
The excitation system comprises an electronic voltage regulator, an exciter and a
rotating diode bridge. The voltage regulator controls the generator output voltage,
supplying the excitation current to the exciter. The exciter and diode bridge operate
as an amplifier and supply the excitation current to the generator main poles

Voltage control
The generator can be operated in parallel. A current transformer for reactive load
compensation is used. The degree of compensation can be adjusted to meet the
requirements for parallel operation with other generators. The static accuracy of the
generator is better than +1% at all symmetrical loads from no-load to rated load. The
voltage can be set steplessly within +10% of the rated voltage.

Overcurrent capability
The stator winding withstands a current, which can be over 3 times the rated current
for about 10 seconds

Accessories
- Anti Condensation heater 230 VAC
- 6 pieces of PT 100 in stator windings, (3 in use, 3 as spare)
- One PT 100 in each bearing

Preliminary reactances and time constants

One set of spares according to the recommendation of the classification society is
included

1.10 Tools and spare parts

1.10.1 Tools (engine)
Tools for the engine according to enclosed tools list T02880001D-04

1.10.2 Spare parts (engine)

Spare parts according to the recommendations of the IACS, unrestricted service, for
the engine(s) according to enclosed spare parts list S02880001D-04

1.11 Packing and transportation

1.11.1 VCI-Coating
The engine is protected during transportation by a plastic VCI-film (Volatile Corrosion
Inhibitor)

1.11.2 Tarpaulin
The engine is protected during transportation by a tarpaulin

1.12 Technical documentation

Installation Planning Instructions
Delivery includes, in English, Installation Planning Instructions (IPI) necessary for
Buyer’s installation work of equipment in Wärtsilä scope of supply.

Any delivery schedule of the IPI is subject to timely supply of necessary, complete
and correct technical data and drawings by Buyer.

InfoBoard
InfoBoard enables online access to project specific documentation (IPIs) and product
related documentation (Project Guides). InfoBoard can be accessed via any internet
service provider with one or several personal login names and passwords free of
charge.

Operating and maintenance manuals, spare part catalogues, certificates and the
record book of engine parameters are also published through InfoBoard.

Type Media Language Qty

Installation Planning InfoBoard + A4 English 3
Instructions (Wärtsilä 9L20) binder
Classification drawings
Buyer shall prepare and submit to the relevant Classification Society and Authorities
(class) all drawings necessary for certification and approval of the vessel unless
otherwise specifically stated. Wärtsilä shall provide equipment certificates of
equipment within the scope of supply.

Torsional Vibration Calculation

Torsional Vibration Calculation (TVC) of systems mechanically driven by Wärtsilä
engine(s) will be made and submitted for class approval by Wärtsilä.

Data and drawings of equipment NOT included in Wärtsilä scope of supply, which are
required for preparation of TVC, shall be supplied to Wärtsilä not later than four (4)
weeks after Contract, unless otherwise agreed

1.12.1 Engine Manuals

Set of engine Operating & Maintenance manuals (O&M manuals) and spare parts
catalogues per shipset for the equipment included in Wärtsilä scope of supply.

Operating & Maintenance manuals

Operating & Maintenance manuals cover instructions and descriptions by text and
pictures of the main actions and cautions needed when operating the delivered
equipment. The engine Operating & Maintenance manual are made specific for the
delivered engine(s)

Spare Parts Catalogue

Spare Parts Catalogues contain the needed pictures for identification of spare parts
to be ordered, stored or installed. The Spare Parts Catalogue furthermore contains
Wärtsilä specific Spare Part Numbers, which shall be used when ordering parts. The
Spare Parts Numbers are connected to Wärtsilä unique Code Resolution system,
enhancing the precision of spare parts processing and minimizing the need for
updating at the customer’s side.

Type Media Language Qty

O&M Manual (Wärtsilä 9L20) A4 Binder English 3
Spare parts catalogue (Wärtsilä 9L20) A4 Binder English 3

Record Book of Engine Parameters

The Record Book of engine parameters lists all the parts being under emission
regulations with pictures and codes and also contains original certificates

Delivery 1 pcs Book of Engines Parameters as A4 binders