gas diesel engine march2010

7/28/2019 Gas Diesel Engine March2010

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Gas Diesel Engine




Wärtsilä 32GD Generating Set




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




Gas Diesel - Main Components

QUICK CLOSING VALVE

DOUBLE WALLED GAS PIPE

SOLENOID VALVE

DUAL FUEL INJECTION VALVE

FUEL INJECTIONCONTROL

ELECTRONIC SPEED

GOVERNOR




Gas Diesel Cylinder Head




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




Gas Injection System




p1p2 d


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




Multi-needle Injection Valve





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




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




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

gas diesel engine march2010

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