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10 years of LNG at sea
 
10 years of LNG at sea
Better power for a changing world
10 years of LNG at sea
Rolls-Royce has significant and growing experience with its Bergen lean-burn technology. More than 650 gas engines have been delivered for operation on land or at sea, and more than 31 million running hours of experience have been accumulated.
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Delivering clean power for the future

The marine industry relies on fuel oils for most powering needs, but tighter emission regulations and the need to ‘go green’ are starting to convince operators to consider alternatives. Rolls-Royce gas engines have proven themselves to be the cleanest, most efficient piston engines on the market. Since the introduction of the Bergen lean-burn technology more than 700 gas engines have been delivered and over 31 million operating hours accumulated at sea and on land.

Low emissions
Responsiveness
Low maintenance
Safety
Fuel efficiency

Mixing gas and air together for combustion at the right time is crucial to maximizing the efficiency of our engines. Bergen lean burn gas engines turn around 50% of the energy in the fuel into power at the flywheel. If a waste heat recovery system is added this figure could potentially rise by a further 20%, depending on the technology used.

The lean burn system combines spark-ignition with a prechamber, so the engine uses a lean mixture of gas and air. At the start of the compression stroke a valve feeds the right amount of gas for ignition into the prechamber, where it is ignited by the spark plug at the right moment.

This charge is directed into the cylinder, bringing enough energy to ignite the lean mixture.

Advanced control systems meter the gas, control the air pressure, valve and ignition timing. Knock sensors detect changes and adjust the control system, ensuring methane slip is reduced to very low levels. The engine combustion technology is robust and ensures that the engines can operate on a wide range of gas qualities.

“Using the Rolls-Royce Power Management system, engines can be run at their most efficient load, minimising fuel consumption and helping our customers cut their total emissions.”

Trond Hauge
Technical Manager, Island Offshore

Systems
Explore our ship systems

Rolls-Royce tailors the entire system design, combining gas engines with an efficient propulsion system to meet individual customer needs and the operating profile of the vessel. We can also add an efficient hull design, and – if needed – a hybrid solution with PTI/PTO to provide system flexibility. Our delivery also includes a complete automation and control system where all equipment is interfaced with optimum efficiency and operating economy.

Passenger
Cargo
Tug
Offshore
Tug  |  Features

Ever stricter environmental regulations are pushing ship owners and operators towards cleaner energy sources. The Rolls-Royce gas propulsion system powered by Liquefied Natural Gas (LNG) has proven to offer the optimum route to cost-effective environmental compliance.

Rolls-Royce provides a complete gas powered propulsion system from the bunkering flange to the propeller thrust, comprising gas fuel system, gas engines, Azimuthing thrusters, automation and control systems. All equipment is interfaced with optimum efficiency and operating economy.

LNG tank

Three types of tanks are available on the market: Type A, B, and C. The vacuum insulated C-type is the most commonly used.

IMO type C-tank allows for pressure build up, partial loading, easy installation and a wide range of volume per tank.

High speed gas or diesel generator set

The vessel can be equipped with diesel or gas auxiliary engines.

Medium speed gas engines

The Bergen lean-burn gas engines are the cleanest and most efficient piston engines available today, and are classed for both marine propulsion applications and power generation offshore and onshore. Compared to diesel engines, Bergen gas engines give an emissions reduction of 92% NOx, and around 22% CO2. They also virtually eliminate SOx and particulates, and already meet the IMO NOx Tier 3 requirements that will come into force in 2016.

Power management system

Switchboards have a simple interface to the Integrated Alarm System (IAS) and can be equipped with Power Management System (PMS) for optimized control of the power system and Arc Fault System for enhanced personnel safety. Other control and safety systems, which form a part of a Rolls-Royce diesel-electric or hybrid propulsion system, are integrated in the switchboard: Blackout Prevention System (BPS), Digital Excitation System (DES), Voltage Quality Monitoring System (VQM).

Automation and control

The Rolls-Royce ship automation system (Acon) is designed to control and monitor ship operational systems and equipment, and comprises a wide range of control, monitoring and alarm products. Acon products are normally delivered as integrated automation systems with multifunctional operator stations - Acon IAS. The Acon IAS user interface is tailored to the ship with access to the underlying ship systems through an ergonomic standardised interface specially designed for easy and safe operation.

Azimuthing thrusters (US-type)

The standard Rolls-Royce US range comprises seven standard Z-drive units with a power range of 330-5,000kW and a bollard pull ranging from 11-170 tons. The propeller of the US azimuth thruster is 360 degrees rotatable around the vertical axis, providing superior manoeuvrability.

Several configurations are available to closely match the thruster size and power to the vessel application. The low noise and vibration levels further enhance the area of use.

Details
Borgøy
Bukser & Berging
Country
Norway
Ship type
Tug
Rolls-Royce engine scope
2 x C26:33L6PGas
Details
Bokn
Bukser & Berging
Country
Norway
Ship type
Tug
Rolls-Royce engine scope
2 x C26:33L6PGas
Details
Hai Yang Shi You 525
China National Offshore Oil Corporation (CNOOC)
Country
China
Ship type
Tug
Rolls-Royce engine scope
2 x C26:33L9PG
Talk to an expert
Excellence is our way of life
Oscar Kallerdahl Sindre Holmelid Håberg Kim Espen Tepstad
 
 
About Oscar Kallerdahl
Sales Manager, LNG Systems

Oscar Kallerdahl holds a M.Sc. in Mechanical Engineering and Product Development. After many years in Rolls-Royce he has covered the full range of Rolls-Royce products and gained in-depth knowledge of the core processes that drive businesses – from Customer Relations, Sales and Contract Management, to Production, Delivery and Warranty Handling.

 
 
About Sindre Holmelid Håberg
Area Sales Manager - OSV & Merchant - Engines, Commercial Marine

Sindre Holmelid Håberg started as a diesel mechanic, subsequently obtaining an engineering degree in Mechanical Engineering, specialising in reciprocating engines. Sindre’s wide-ranging knowledge enables him to provide customers with a full and complete understanding of all available options open to them, and their vessel.

 
 
About Kim Espen Tepstad
General Manager Sales, Engines

Kim Espen Tepstad has spent all his working life with marine engines, starting out with nearly 5 years on the production line, assembling and testing them. After working closely with design and engineering teams for many years, this has given him a deep understanding of all aspects of engine design.

Services
Services & aftermarket support

With our network of strategically located marine workshops spread across the globe, we can support our customers’ repair and overhaul needs wherever they are operating. Services are tailored to customer requirements, providing rapid turnarounds to meet docking schedules, while working to ISO quality standards.

Product training
Product training
24/7 technical support
24/7 technical support
Services
Services

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