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Gas Diesel Engine
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Wärtsilä 32GD Generating Set
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Main Technical Data
Engine type Wärtsilä 32 GD Wärtsilä 32 LNGD
D-rating D-rating E-rating
Speed (RPM) 750 720 750 720 750 720
Cylinder output (kWshaft) 375 370 375 370 410 405Cylinder output (hp
shaft) 510 503 510 503 557 550
Mean effective pressure (bar) 21.3 21.9 21.3 21.9 23.3 24.0Mean piston speed (m/s) 8.75 8.4 8.75 8.4 8.75 8.4
Engine type Wärtsilä 32 GD Wärtsilä 32 LNGD
Cylinder bore 320 mm 320 mmStroke 350 mm 350 mmPiston displacement 28.2 l/cylinder 28.2 l/cylinderNumber of valves 2 inlet valves and 2 inlet valves and
2 exhaust valves 2 exhaust valvesCylinder configuration 4, 6, 8 and 9 in-line 4, 6, 8 and 9 in-line
12, 16, and 18 in V-form 12, 16, and 18 in V-formV-angle 50 ° 50 °Direction of rotation, seen fromflywheel end clockwise, counter-clockwise on
request
clockwise, counter-clockwise on
request
7/28/2019 Gas Diesel Engine March2010
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Gas Diesel - Main Components
QUICK CLOSING VALVE
DOUBLE WALLED GAS PIPE
SOLENOID VALVE
DUAL FUEL INJECTION VALVE
FUEL INJECTIONCONTROL
ELECTRONIC SPEED
GOVERNOR
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Gas Diesel Cylinder Head
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QCV
ERV
Injection valve
Double walled pipe
Gas Diesel Engine Concept
Gas injection system
Common rail system
Double walled pipes
Cylinder specific T-piece
O-ring seals of special hard FPMcompound
Quick closing valve (QCV)
Flow fuse
Accumulator
Combined diesel oil and gasinjection valve
Electronic rail valve (ERV) forhydraulic control of gas injection
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Gas Injection System
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p1p2 d
Gas Diesel Engine Concept
Quick closing valve
Flow fuse
Prevents excessive flow tocombustion chamber
Accumulator
Maintains gas pressure during
injection
Spring force and valve orificeoptimized
High performance
Maximum safety
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Multi-needle Injection Valve
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Gas Diesel Engine Concept
Multi-needle injection valve
Separate gas channels to eachneedle
Buffer gas volume connected toeach gas channel
Seal oil between nozzle and nozzle
holder
Seal oil around each gas needle
Seal oil pressure > gas pressure
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Gas Quality Requirements
Fuel property Min./max. Limit Unit
Lower heat value min. 30 MJ/Nm3 2)
Gas supply pressure to engine 1) max. 350 ± 5 bar
Gas temperature before engine max. 50 °C
Methane (CH4) min. 60 vol.-%
Carbon dioxide (CO2) max. 1 vol.-%
Chlorine's + fluorine's max. 50 vol. ppm
Hydrogen sulphide (H2S) max. 500 vol. ppm
Other sulphides or mercaptans max. 50 vol. ppm
Water (H2O) max. 100 vol. ppm
Particles or solids size max. 10 µm
1) 310 bar for engines with max output ≤ 85% D output 2) Nm 3 defined at 0°C, 1.01 bar
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Fuel Oil Quality Requirements
Fuel property Min./max. Limit Unit
Viscosity, max. max. 55730
7200
cSt/100°C
cSt/50 °Csec. RI/100F
Density at 15 °C max. 0.991 g/ml
Flash point, Pensky-Martens min. 60 °CPour point, upper- winter quality- summer quality
max.max.
3030
°C
°CConradson Carbon residue (MCR) max. 22 % massAsh content max. 0.20 % mass
Water max. 1.0 % volumeWater 1) max. 0.3 % volumeSulphur content max. 5.0 % massVanadium content max. 600 mg/kgSodium content max. 100 mg/kgSodium content 1) max. 30 mg/kgAluminium + Silicon content max. 80 mg/kg
Aluminium + Silicon content 1) max. 15 mg/kgAsphaltenes max. 14 % massTotal sediment potential max. 0.1 % massCCAI-index 870
1) Before engine
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