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

Dual Fuel Engine Conversion

JFE Engineering Corporation

18 May 2010


Engine cycle

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

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

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

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

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

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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