Ambient conditions
The equipment is designed for the following conditions:
Maximum ambient air temperature 45 °C
Maximum LT cooling water temperature before engine 38 °C
Maximum sea water temperature 32 °C
Classification
The equipment meets the requirements of LR for unrestricted service at the date of quotation.
Electric power supply
If not specially mentioned, all electrical equipment delivered with the engine is designed to operate with:
Main voltage 3x440 V
Frequency 60 Hz
Control voltage 24 VDC
Fuel oil quality
The equipment is specified for fuel according to ISO 8217:2005 (E) with a viscosity of max. 380 cSt/50°C.
HFO
The following conditions, not specified in the ISO standard also apply:
Viscosity min., before injection pumps 16 cSt
Viscosity max., before injection pumps 24 cSt
CCAI, max. 870
Water before engine, max 0.3 % volume
Sodium before engine, max 30 mg/kg
Aluminium + Silicon before engine, max 15 mg/kg
Asphaltenes, max 14 % mass
MDF
The following conditions, not specified in the ISO standard also apply:
Viscosity min., before injection pumps 2.0 cSt
Viscosity max., before injection pumps 24 cSt
Sodium before engine, max 30 mg/kg
Aluminium + Silicon before engine, max 15 mg/kg
Flash point (PMCC), min 60 C
Pour point, max 0-6 C
Water quality
Fresh cooling water shall be treated with approved products.
Lubricating oil quality
Only approved oils shall be used for the equipment.
1.1.1 Wärtsilä 8L32 6
Application
Engine driving a generator at constant speed.
Main particulars
Max continuous rating (MCR) 3840 kW
Speed 720 rpm
Configuration In-line engine
Number of cylinders 8
Cylinder bore 320 mm
Stroke 400 mm
Swept volume per cylinder 32.2 dm3
Mean piston speed 9.6 m/s
Mean effective pressure 24.9 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 HFO and corrected to a net calorific value of 42,700 kJ/kg:
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 MARPOL 73/78 ANNEX VI valid at the date of the quotation.
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 closest to the actual specification. 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
- Spring loaded control valve in the return pipe
- Fuel oil pulse dampers (supply and return)
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 back flushing line
- Lubricating oil cooler of tube type
- Lubricating oil thermostatic valve
- Wet oil sump
- Separator connections including shut off valves
Starting air system
- Starting air master valve
- Blocking valve for turning gear
- Control air container
- None return valve
- Starting air distributor
- Starting air valve in each cylinder head
- Flame arrestor
Cooling water system
- Engine driven HT-cooling water pump without stand-by connection
- HT thermostatic valve, direct acting type
- Engine driven LT-cooling water pump without stand-by connection
- LT thermostatic valve, direct acting type
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 operated
- Exhaust gas waste gate
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:
- shutdowns (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 and monitoring system through Ethernet Modbus TCP/IP or RS-485 serial link/Modbus RTU
- hardwired interface with external systems for control functions such as remote start and stop
Operator interface
The operator interface consists of a local control panel (LCP) with backup indications, control switches and buttons, as well as a local display unit (LDU).
Both are built on the engine. 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.
Independent indications on the local control panel:
- Engine rpm
- Turbocharger rpm
- Running hours
- HT water temperature
- Lubricating oil pressure
Control switches and pushbuttons on the local control panel:
- BLOW/BLOCKED/LOCAL/REMOTE control mode switch
- Local START/STOP pushbuttons
- Shutdown RESET pushbutton
- Emergency stop pushbutton
Sensors
- Alarm, safety and measuring sensors according to maker and class requirements as per enclosed sensor list A01887215.
- Connections for testing of pressure sensors
- Additional FAKS sensors
- Sensors are wired to the engine mounted I/O- and control modules
Miscellaneous
- Flywheel with a gear ring for turning
- Electrical turning device
- Crankcase explosion valves
- Safety valve in each cylinder head
- 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 acrylic-based paint in colour Munsell no 7,5 BG 7/2
1.12 Foundation
1.12.2 Flexible pipe connections 6
Flexible hoses for the pipe connections on engine(s).
1.12.3 Common base frame 6
Foundation for the engine and the alternator:
- Common base frame of welded steel
- Flexible mounts for common base frame
- Alternator fittings materials are included.
- Flywheel cover between engine and alternator
