2 gas fueled

8/22/2019 2 Gas Fueled

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The new 32/40PGI engine


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Agenda

Gas as fuel

Gas Engines Market requirements

Development goals

Gas Engines

Lean burn principle

PGI principle

V32/40PGI Design

V32/40PGI Validation/ Application

Summary


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Gas as fuel

Very low emission levels:

Clean burning

Relatively free of contaminations

Methane contains the highest amount of hydrogen per unit of energy of

all fossil fuels -> lower CO2 emissions

Lean burn Otto process provides very low NOx emissions

Natural gas compared to diesel:

CO emissions reduction approx. 75%

CO2 emissions reduction approx. 20% NOx emissions reduction approx. 80%

No SOx emissions

Less particle emissions

No visible smoke

C HH

H

H


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Gas Engines Market requirements

Power Generation with highest possible efficiency

High specific power output

Low emissions

Low Life cycle costs (LCC)

Gas flexibility


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MBD- Development goals

High power output

Lower emissions

Higher efficiency than

other gas engine

concepts

Own unique strategic

position


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Gas Engines Competition

Electrical Engine Output [kW]

Competition

750 rpm- class- Power Generation

0 2,500 5,000 7,500 10,000

RR Bergen B35:40G

V32/40PGI

W34SG

16VGCM34

MHI M30G

Technology

PGI

SI/PC

SI/PC

SI/PC

MP/PC


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Gas Engines Competition

750 rpm- class

specific power output

bmep [bar]

Competition

10,0 15,0 20,0 25,0

RR Bergen B35:40G

V32/40PGI

W34SG

16VGCM34

MHI M30G

+12.5%


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Gas Engines Lean burn principle


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Otto principle

Low-pressure gas

admission

Ignition either by spark

plug or Pilot diesel

injection

Ignition by

Spark plug

Ex.In.

Ignition by

pilot diesel fuel

Ex.In.

MP-Concept

SI-Concept

*

Intake of

air and gas

Ex.In.*****

***** *

****

***

*

Compression of

air and gas

Ex.In.

***

****


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Examples of lean burn gas engines - W34SG


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Weaknesses of SI/ MP-Concept:

Lifetime of spark plug decreases with increase in

bmep higher LCC with increase in output i.e.

component limit

Different fuel systems for Micro-Pilot concept with

diesel pilot fuel higher LCC and emissions


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PGI Principle

PGI - Performance Gas Injection

Lean burn principle

First monofuel combination of Diesel and Otto

process in a Gas Engine Micro-Pilot Injection with pilot gas, approx 1% pilot

quantity

Ignition of pilot fuel at a hot surface inside

prechamber

Lower LCC due to lower wear at ignition

components in comparison to competition (SI)


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Gas Engines PGI principle

Otto principle

Low-pressure gas

admission

Ignition by Pilot gas

injection

PGI-Concept

PGI-Core element

*

Intake of

air and gas

Ex.In.*****

***** *

***** *

**

Compression of

air and gas

Ex.In.

***

****

Ignition by

pilot gas fuel

Ex.In.


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PGI Principle


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PGI Performance features

PGI The gas engine without spark plugs

High Power Output comparable to diesel

engines

Highest thermal efficiency combined withextremely low emissions

Long lifetime for ignition system no spark

plugs

Lower maintenance cost for the PGI engine

Gas flexibility


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V32/40 PGI Technical Data

Combustion process: Lean-burn

Number of cylinders: 12V 18V

Power output5400 kW 8100 kW (750 rpm)

5160 kW 7740 kW (720 rpm)

Cylinder bore: 320 mm

Piston: 400 mm

Engine speed: 720/750 rpm

Mean piston speed: 9.6/10.0 m/s

Mean effective pressure: 22.4 bar

Frequency: 60/50 Hz

Specific energy consumption: 7740 kJ/kWh


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Design of the new V32/40PGI

piston

charge air

exhaust gas

valve train

turbo charger

gas admission valvegas pipe

Ignition system


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V32/40 PGI Detail Design


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V32/40 PGI Detail Design

Gas supply pipe

Solenoid gas

valve

Charge air pipe


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32/40PGI

Engine Management System

Pilot Gas


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32/40PGI

Engine Management System

Individual control of

each cylinder

Efficient operation in small

operating window

Safe margin to knocking

and misfiring limit


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PGI Development process

Basic-Development

DesignPrototype/Series

Validation

Field

engineeringDevelopment-Project

Project Start / ReleaseSeriesSales

PGI Concept

Study on single

cylinder Transfer to

Prototype

Application in

MBD-CHP-

Plant


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V32/40PGI Test phase

Engine test on development test

bench

Continuous operation

in power plant


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V32/40PGI CHP-Application at MBD

Power output


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Summary

The PGI-Gas Engine has a completely new ignition concept

The PGI concept is a combination of Diesel and Otto process

The specific power output is comparable to diesel engines

The PGI engine has very low emissions

The PGI engine has a high efficiency with these low emissions

2 gas fueled

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