Dual fuel engine conversion
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Dual Fuel Engine Conversion. JFE Engineering Corporation. 18 May 2010. Engine Cycle. Pilot Injection. Gas Admission. Intake. Compression. Combustion. <Diesel Mode>. Advantages : DF engines can operate at 100% load using only diesel oil in case of need. Intake. Compression. Combustion.

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Dual Fuel Engine Conversion

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Dual Fuel Engine Conversion

JFE Engineering Corporation

18 May 2010


Engine Cycle

Pilot Injection

Gas Admission

Intake

Compression

Combustion

<Diesel Mode>

Advantages :

DF engines can operate at 100% load using only diesel oil in case of need

Intake

Compression

Combustion

Fuel gas : 95%

Fuel oil : 5%

<Dual Fuel Mode>


Features of Dual Fuel Engine

  • Less operation cost

  • → Main fuel : Natural Gas

  • Environmental friendly

  • → Drastic reduction of NOx, SOx & CO2 emission

  • Stable operation

  • → Pilot injection system

  • → Operatable on either fuel of natural gas or diesel oil

  • Excellent dependability

  • → Main component : Diesel engine

  • Clean combustion and Less maintenance cost

  • Effective utilization of existing assets


Reductions

  • Operation CostApprox. 30% less

    *Reduction in Operation Cost will fluctuate because of the operation conditions of engines and the price level of fuel oil and natural gas in a project site.

  • CO2 Emission30% less

  • SOx Emission95% less

  • NOx Emission20% less

  • (comparing with diesel oil firing)


Dual Fuel Engine Conversion

Before Conversion

After Conversion

Exhaust System

Air/Gas Intake System

Fuel Injection

System

Cylinder Head

Piston

Connecting Rod

Typical samples of the

Dual Fuel Engine

(Carburetor Type)


Major Modified Engine Parts and Auxiliaries for Conversion

Engines parts

<additional parts>

- Gas admission system, knock detector

- Air/Fuel ratio control system

- Oil mist ventilation system

<Specification change parts>

- Piston ring, Piston pin metal

- Fuel injector, Plunger assembly, Fuel governor

<Modification parts>

- Cylinder head, Piston, Liner, Charge air duct, T/C matching

Plant Auxiliaries

- Gas supplying system

- Safety device for gas system

- Engine control panel

- Remote monitoring system


Schematic Diagram for DF System

<New Installing Part for Conversion>

IDO Tank

Shut off Valve

Gas Press. Regulating Valve

S

Gas

Pump

Air Filter

FO Injection Pump

Exhaust Gas

Air

Rev. Pick up

Valve

Controller

Governor

Cam

Turbocharger

DO Injector

A

Gas Admission Valve

Air Cooler

Charged Air

A

To Turbocharger

Water

Main Controller

(Fuel, Gas)

Piston


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