51/60GFour-stroke gas engine

MAN Diesel & Turbo is the world’s leading designer and manufacturer of low and

medium speed engines. Our involvement with electrical power generators goes

back to 1904 when we supplied the first ever diesel generator sets to the Kiev Tram

System.

Since those early days, MAN Diesel & Turbo has never lost its technological pre-

eminence in the large engine field. Likewise, our engines have never relinquished

their status as the most efficient combustion engines available.

More than ever before, MAN Diesel & Turbo’s development focus is on the environ-

mental performance of our engines. Using our unrivalled grasp of large engine

technology, we aim to make our engines progressively cleaner, more powerful and

more efficient.

With our absolute commitment to reducing emissions while increasing fuel effi-

ciency and power density and our pro-active involvement in the emissions law

making process, we intend to be part of the global emissions solution.

351/60G – Four-stroke gas engine

4 51/60G – Four-stroke gas engine 551/60G – Four-stroke gas engine

51/60GA new class of large bore gas engine

Modern and innovative

With its newest gas engine, the 51/60G, MAN Diesel

& Turbo is bringing the benefits of gas engines to

power and co-generation plants with electrical out-

puts of 100 to 300 MW, a category previously domi-

nated by gas turbines.

Highest power density

The 51/60G is available in a v-engine version with 18

cylinders and an output of 18,900 kW. This output

– 1,050 per cylinder for 50 and 60 Hz power genera-

tion – gives the 51/60G best-in-class power density

among gas engines.

Further major benefits of the 51/60G include Largest, most powerful gas engine on the market Reliable combustion of lean air/gas mixtures High and stable ratings in hot and high locations Excellent load response Low gas admission pressures Ease of maintenance

Cogeneration or combined cycle

In addition to using thermal energy recovered from

engine sources for heating or cooling in cogeneration

or trigeneration applications, the exhaust heat of the

51/60G engine can also be used to produce steam to

drive a steam turbine generator. As a result the over-

all output and efficiency of the power plant can be

increased without additional fuel costs.

Low emissions

At a maximum of 500 mg/Nm3, dry @ 5% O2, the

51/60G achieves emissions of oxides of nitrogen

(NOx) in compliance with Germany’s TA Luft clean

air regulations and undercuts the limits currently pre-

scribed by the World Bank by a wide margin.

Advanced ignition technology

Derived from the proven 48/60 diesel engine platform,

the 51/60G uses a state-of-the-art ignition system in

combination with a scavenged prechamber guaran-

teeing the stable and reliable ignition of the lean air/

gas mixture, and producing low emissions.

Gas engines are claiming an increasing share of the market for electrical power

generation – thanks to their clean combustion, high efficiencies, comparatively low

carbon dioxide emissions and the attractive price of natural gas.

51/60G – spark ignited gas engine; principle

Intake of air and gas Compression of gas air mixture Ignition by prechamber

Precombustion chamber ignition

In order to secure an efficient and reliable ignition of

the 51/60G lean burn gas engine, a flushed precom-

bustion chamber is used.

Due to its rich mixture compared with the main cham-

ber, the precombustion chamber is easy to ignite and

offers an excellent ignition stability. Its high energy

density amplifies spark plug efficiency, allowing fast,

stable combustion of the lean mixture within the main

chamber – despite the large dimensions of the cylin-

der.

6 51/60G – Four-stroke gas engine 751/60G – Four-stroke gas engine

51/60G Technical DataOverview

Highest Quality, Highest Output

Four-stroke gas engine 18V51/60G

General

Engine cycle: four-stroke

Turbocharging system: constant pressure

Number of cylinders, V-engine: 18

Bore: 510 mm

Stroke: 600 mm

Swept volume per cylinder: 122.6 dm3

Cylinder output (MCR)

at 514 rpm, 60 Hz: 1,050 kWm

at 500 rpm, 50 Hz: 1,050 kWm

Cooling

Cylinder cooling: Fresh water

Charge air cooler (two-stage): Fresh water

Starting method

Compressed air

Emissions

NOx-emissions maximum 500mg/Nm³ dry @ 5% O2

Reference conditions according ISO 3046-1: 2002

The stated consumption figures refer to: Ambient air pressure: 1,000 mbar Relative humidity: 30% Ambient air temperature: +25°C (77°F) Charge air temperature: According to engine

type, corresponding to 25°C cooling water tempera-

ture before charge air cooler

Specific gas consumption*, GenSet

Heat rate: 7,606 kJ/kWhel

Electrical efficiency: 47.3 %

Nominal generator efficiency: 97.7 %

Lube oil consumption (20% tolerance)

18V51/60G: 9.0 kg/h

*ISO 3046-1 conditions; including attached pumps; MN > 80;

tolerance +5%; engine type specific reference charge air tempera-

ture before cylinder 43°C; Lower calorific value of fuel gas ≥ 28.0

MJ/ Nm³ (Nm³ corresponds to one cubic meter of gas at 0°C and

1,013 bar); p.f 0.9;

Engine frame

Rigid housing of single-cast monobloc construction,

strengthened by tie bolts running from the suspended

main bearing through to the top edge of the engine

frame and from the cylinder head through to the inter-

mediate bottom.

Cylinder liner

Thick-walled design isolated from external deforma-

tion, resulting in optimum running conditions for the

piston.

Cylinder head

Combustion chamber geometry optimised for com-

bustion of gas. In-cylinder spray atomisation delivers

a very good air-fuel ratio for optimum combustion.

Stepped piston

Forged, dimensionally stable steel crown (with shaker

cooling by using oil), made from high-grade materials

with skirt in nodular graphite iron. Chromium ceramic

coating of the first piston ring with highly resistant

ceramic particles in the ring surface, resulting in low

wear of ring and liner.

Connecting rod and bearing

Optimised “marine head” design to allow piston over-

haul without removal of the connecting rod bearing

cap. Specially designed bearing shells in the connect-

ing rod for increased reliability.

Valves

Exhaust gas valves with propellers on the shaft for

self-turning effect in the exhaust gas stream and seat-

ing in armoured, water-cooled valve seats, resulting in

low valve temperatures. The inlet valves are equipped

with Rotocap mechanical rotators.

Service-friendly design

Hydraulic tools used for tightening and loosening cyl-

inder head nuts; clamps with quick release fasteners

and/or clamp and plug connectors; generously sized

access covers; hydraulic tools for crankshaft bearings

and big end bearings; sleeve spring vibration damper

is practically maintenance-free.

SaCoSone

The 51/60G engine is equipped with the safety and

control system SaCoSone. SaCoSone guarantees reli-

able engine operation with an optimum operation

range between knocking and misfiring. All cylinders

are regulated individually.

Cooling

The 51/60G features single-stage engine cooling and

two-stage charge air cooling.

*TBO = time between overhaul

MAN Diesel & Turbo has all the major elements of engine tech nology in house.

All engine parts are designed and constructed with the aim of achieving the highest

reliability, ease of maintenance and longest possible TBOs*.

751/60G – Four-stroke gas engine

8 51/60G – Four-stroke gas engine 951/60G – Four-stroke gas engine

GenSet output* (kWe)

500 1/min, 50 Hz (kWe) 514 1/min, 60 Hz (kWe)

18V51/60G 18 cyl. 18,465 18,465

Mean piston speed 10.0 m/s 10.3 m/s

Mean effective pressure 20.6 bar 20.0 bar

* Nominal generator efficiency: 97.7%

Engine 51/60G

Engine type No. of cyl. A (mm) B* (mm) C* (mm) W (mm) H (mm) Dry mass* (t)

18V51/60G 18 13,148 5,410 18,558 4,700 6,530 373

Four-stroke engine V51/60G

V51/60G

a BC

H

W

* Depending on alternator

Technical DataV51/60G

Dimensions and WeightsV51/60G

MAN PrimeServ – peace of mind for life

With more than 100 PrimeServ service stations and

service partners worldwide and our growing network

of PrimeServ Academies, the MAN Diesel & Turbo

after-sales organisation is committed to maintaining

the most efficient, accessible after-sales organisation

in the business.

PrimeServ’s aim is to provide:

Prompt, OEM-standard service for the complete

life cycle of an installation

Training and qualification of service personnel at

our PrimeServ Academies to maximize the avail-

ability and viability of a plant

Rapid, global availability of genuine, 100% quality-

assured MAN Diesel & Turbo spare parts via local

outlets or our 24 hour hotline.

PowerManagement by MAN Diesel & Turbo

Complementing the PrimeServ after-sales offering is

the MAN PowerManagement concept.

MAN PowerManagement packages provide integrated

support solutions for all aspects of the running of a

power or cogeneration plant. Individually negotiated

agreements can cover assistance with – or delega-

tion of – the management of all mechanical, electrical

and thermal equipment. In this way the power plant

operator gains comprehensive access to the tech-

nology, experience, best practices and professional

resources of MAN Diesel & Turbo.

In short: PowerManagement by MAN Diesel & Turbo

allows you to benefit from our specialist expertise in

running a power plant while you concentrate on your

own core business.

World Class ServiceExpert advice and assistance

10 51/60G – Four-stroke gas engine

MAN Diesel & Turbo86224 Augsburg, GermanyPhone +49 821 322-3897Fax +49 821 322-1460powerplant@mandieselturbo.comwww.mandieselturbo.com

All data provided in this document is non-binding. This data serves informational

purposes only and is especially not guaranteed in any way. Depending on the

subsequent specific individual projects, the relevant data may be subject to

changes and will be assessed and determined individually for each project. This

will depend on the particular characteristics of each individual project, especially

specific site and operational conditions. Copyright © MAN Diesel & Turbo.

D2366418EN-N2 Printed in Germany GMC-AUG-07121

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