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DIESEL ENGINE OF 2MW3.1 TECHNICAL DATA Technical particulars for the
diesel engine are as follows: .
Number of cylinders
8 . Arrangement of cylinders In Line .
Bore (mm) X Stroke (mm)
300 X 380
.
Type
4
stroke, single
acting, direct
injection/turbocharged
charge air cooled .
Rotational speed 600 RPM .
Mean effective pressure
20.5 Bar
at rated power & speed .
Mean piston speed
7.6 m/sec. .
Rotation as seen from
Clockwise
coupling side. .
Swept volume per cylinder
26.875 litres .
Combustion chamber volume 2.067
litres .
Compression ratio
13:1 .
Avg max. combustion pressure 130
bar
(at rated power/speed) 3.2 Power rating 3.2.1
Rated power under ISO Conditions mentioned in
2.1.1 . Maximum
continuous rating (MCR)
3000 HP
at engine crankshaft .
Corresponding rotational speed 600
RPM 3.2.2
Under the following limiting ambient conditions : . Air temp. at turbocharger inlet
45 deg. C . Water temp. at charge air
cooler inlet32 deg. C Deration to power applicable for
engine 0 %(nil) Beyond the abovementioned
limiting conditions, deration to power as per ISO 3046 will be applicable. Rated Power under site conditions
mentioned in 2.1.2
. Maximum continuous rating (MCR)
3000 HP at engine crankshaft 3.2.3
The engine should be capable of accepting a sudden load as per the
guidelines in ISO-8528-5-1993(e). As per this standard, the maximum sudden load
increase stages are
Baseload
% Sudden load
increase to % --------------------------------------------------- 1st Stage
0%
40
40% 2nd Stage
40%
30
70% 3rd Stage
70%
20
90% 4th Stage
90%
10
100% During each of the
above-mentioned stages of sudden loading,
the transient speed drop will be restricted to a maximum value of 10% of the
rated speed. 3.3
FUEL AND LUBE OIL 3.3.1 Fuel Each of the engine offered should
be suitable for operation on Fuels: HFO
/ DO.(max. viscosity 700 cst at 50
deg.C.)
Fuel consumption: The hourly rate of fuel
consumption per Metric Horse Power delivered at the crankshaft flange at rated
power & speed (after running in of the engine & for engine with driven
raw water, fresh water & lube oil pumps ) is
145.00 gms,
when engine operates at
Maximum Continuous Rating (MCR). FUEL CONSUMPTION (with 3 driven
pumps) ====================================================
G8300ZD8
Consumption at
(600 RPM)
engine Cr.shaft
gm/hp/hr ====================================================
100% Load
145.00
SITE
-----------------------------------------------
75% Load
148.00
CONDITION-------------------------------------------
50% Load
155.00
==================================================== The values are subject to a 3% tolerance and apply when burning fuel with a net calorific value of 10,200 KCal/Kg minimum. 3.3.2 Lubricating Oil: Oil sump capacity (ltr) The engine is equipped with a dry
sump attached to the bottom of the crankcase. The lube oil for the engine is
stored in a separate tank positioned away from the engine. This arrangement
offers much more reliability than the wet sump arrangement & also increases
the time between oil changes. The
total oil capacity of this lube oil tank is 2000
ltrs. Lube oil consumption The average lube oil consumption
is 1.6 gm/kwh
(+/- 0.2 gm/kwh) at MCR at crankshaft for a well-run engine. Continuous centrifuging is
essential for lube oil when operating on Furnace Oil.
3.4 SCOPE OF SUPPLY (STD) 3.4.1 Starting air circuit 3.4.1.1 Equipment fitted on the engine: Compressed
air starting equipment including: -
One rotary distributor -
One air starting valve in each cylinder head -
Connecting air piping on the engine 3.4.1.2 Equipment delivered loose: - One air compressor air - One air bottle of 500 ltrs (30 bar) capacity. This
capacity is enough to start the engine 7 times
without intermediate refilling of the receiver. - Complete
interconnecting piping with flanges, fasteners, valves, non-return valves,
bosses, supports, etc as necessary. 3.4.2 Lube Oil Circuit: 3.4.2.1
Equipment fitted on the Engine:
- One engine driven lube oil
supply pump -
One engine driven lube oil transfer pump - One pressure regulating valve -
One lube oil thermostatic valve (option) - Complete interconnecting piping with flanges,
fasteners, valves, non-return valves, bosses,
supports, etc as necessary. 3.4.2.2 Equipment delivered loose: -
One tank for lube oil (2000 ltrs capacity)
with interconnections to the engine -
One electric motor driven lube oil-priming pump (option) - One manual lube oil-priming pump - One lube oil cooler - One
centrifugal lube oil filter (FLL75 bypass type) 3.4.3 Cooling Water Circuit The
engine cooling is achieved by close cooling water
circuit. A) Close Loop circuit: Drawn
by the water pump from the radiator, the cooling water flows to the air cooler,
and to the injector cooling oil cooler if provided and to the lube oil cooler,
and then enters the inlet water main pipe and the turbocharger. The cooling
water is discharged out through the outlet water main pipe. Between the inlet
water main pipe and the outlet water main pipe there is a thermostatic valve
with a sensor at the engine outlet water main pipe, which by-passes part of the
outlet water to the inlet of the water pump to keep the water temperature to be
not too low. Finally the water is cooled in the radiator. B) Injector cooling: A separate tank contains lube oil
for injector cooling circuit. An engine-driven pump circulates lube oil through
all injectors and an injector cooler carries out the heat transfer. After
cooling the injectors, the lube oil returns to the separate tank. 3.4.3.1 Equipment fitted on the
engine: -
One electrical water pump -
One engine driven injector cooling pump -
One water thermostatic valve -
One water-cooled charge air cooler -
Injector cooling circuit pipes -
Injectors with cooling pipe connections 3.4.3.2 Equipment delivered loose: - One radiator - One injector cooler - One separate tank - One dosing arrangement for water system (for
each D.G. Set) 3.4.4 Fuel Circuit While starting or stopping the
engine DO (Diesel Oil) is used as fuel. When the water temperature at inlet to
engine is more than 60 deg.C and the HFO (Heavy Fuel Oil) is heated to the
required temperature, the fuel can be changed from DO to HFO through a 3-way
fuel valve. 3.4.4.1 Equipment fitted on the engine: - Individual fuel injection pump for each cylinder
with fuel rack & linkages. - Individual injector fitted on each cylinder head - High-pressure injection pipes - Main fuel rails for feeding and return. - High-pressure pipe connection for each cylinder 3.4.4.2 Equipment delivered loose: 1)
Two HFO separator (one for
working, one for standby) 2)
One fuel viscosity control unit
(booster) consisting of: Two electric motor driven fuel
feed pump (one for working, one for standby); Two electric motor driven fuel
booster pump (one for working, one for standby); One duplex type coarse filter; One
pressure-regulating valve; One
steam heater for HFO; One
flow meter for HFO; One
3 way fuel changeover valve; One
viscosimeter & temp controller; One
emergency pressure safety valve; One
duplex type fine filter; one
mixing vessel with safety valve; One
pressure-regulating valve in fuel return; - Complete interconnecting piping
with flanges, fasteners, valves, non-return valves, bosses,
supports, etc as
necessary up to Day Tank. 3.4.5
Air intake & Exhaust system 3.4.5.1 Equipment fitted on the engine: - Lagged set of exhaust manifold with expansion
bellows - One ABB turbocharger. - Exhaust outlet connection with expansion bellow. 3.4.5.2 Equipment delivered loose: - One air filtration system with air ducting - Exhaust ducting with necessary expansion bellows - One exhaust silencer - Insulation /lagging/cladding for exhaust ducting
3.4.6 Compressed Air Circuit for Over-speed Protection 3.4.6.1 Equipment fitted on the engine: - One pneumatically operated safety valve in the
engine fuel pipe shuts off the fuel in case of engine over-speed. 3.4.6.2 Equipment delivered loose: - See 3.4.1.2. 3.4.7 Control and measuring instrument: 3.4.7.1 Equipment fitted on the engine: - One YT111 type hydraulic governor. - One servobooster with piping for governor - Exhaust gas pyrometric system with thermocouple
for each cylinder for
turbine inlet & turbine
outlet with pyrometric duct. - One engine barring arrangement (manual) with safety arrangement for detecting engaged barring gear. - Arrangement for manual stopping of the engine
with safety arrangement for detecting locked hand
stop control. Note: All electrical equipments
installed on the engine are electrically wired up to one or more terminal strips
attached to the common baseframe. Connections for remote pressure detection are
also grouped together on the
baseframe. 3.4.8 Miscellaneous equipments. 3.4.8.1 Equipment fitted on engine: - Individual cylinder head for each cylinder,
each containing two inlet and two exhaust valves
(with valve rotators). - One torsional vibration damper - 4 nos of explosion relief valves on crankcase. - One flywheel & coupling arrangement with
necessary fasteners. - One common baseframe for engine & alternator
with coupling guard, fasteners, anchor bolt etc. NOTE The system is designed for max 380 cst fuel at 50 degree C since this is the most commonly available fuel. If fuel of higher cst is to be used, then please furnish the specifications of the fuel for proper designing of the system. In this case there will be change in certain auxiliary equipment specifications and a corresponding increase in price.
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