Rolls-Royce marine diesel engines

Rolls-Royce Marine Diesel Engines are manufactured by Rolls-Royce plc and cover five ranges of diesel engines for the marine sector.There are three "Bergen" and two Crossley Pielstick ranges with power outputs in the range 1.2MW to 15MW.

Bergen Range

The Bergen marine diesel ranges are denoted by the letters C,B and K and are broadly divided by the power output as follows:

• Bergen K,
• Bergen C and;
• Bergen B32:40

for powers from 1200 – 8,000kW,

• Bergen KG 4.2 and;
• Bergen B35:40

for powers of 1190kW – 8750kW.

These engines can all burn Marine Diesel Oil (MDO) and Heavy Fuel Oil (HFO).

They achieve specific fuel consumptions of between 183 and 196g/kWh. Specific lubricant oil consumptions are of the order of 0.8g/kWh.

Two of the Bergen marine engine variants may be fuelled by natural gas.

Bergen K series

The Bergen K marine diesel and gas engines are a range of marine internal combustion engines manufactured by Rolls-Royce plc.

Mechanical configuration

The Bergen K lean burn marine engines with 250mm bore and 300mm stroke is available as a diesel in 6, 8 and 9 cylinder in-line configurations for propulsion and auxiliary duties.
Features:

• Rigid crankcase minimises deformations and ensures good main bearing alignment
• BMEP 20-22 bar (gas engine 18bar)

Power Outputs

The diesel power range is from 1215-2005 kW. Also available as a gas engine for powers from 1190 – 3970kW the Bergen K-G4 lean burn gas engine is the result of careful development based on the Bergen K.

Fuels and Consumption

• Lub oil consumption approx 0.8g/kWh
• Specific fuel consumption 193-196 g/kWh (8060kj/kWh gas) due to turbocharger design and modern fuel injection technology

The lean burn principle of the K-G4 gas engines operation combines high power and high efficiency coupled with reduced exhaust emissions, and delivers a specific fuel consumption of 7990-8060kj/kWh. Engines in service burn natural gas and also other fuels such as gas derived from landfill and from fermentation of effluents.

Development

Bergen lean burn spark ignition technology was first developed more than fifteen years ago and has proved very popular for power generation on land.

Dry Masses

Bergen K engines have dry masses between 22500 and 30500kg

Longevity

These marine diesel and gas engines have design lives of more than 20 years and engines are installed in more than 150 power plants throughout the world.

Bergen K-G4

Also available as a gas engine for powers from 1190 – 3970kW the Bergen K-G4 lean burn gas engine is the result of development based on the K type diesel and heavy fuel oil engine parent.

Bergen B35:40

The Bergen B Series is a twenty year old (est. 1986) marque of reciprocating diesel engines. They serve a wide range of ocean-going vessels and; can be supplied as propulsion units or as generator sets for the provision of electrical power. The range includes in-line and Vee cylinder configurations.

The Bergen B Series Marine Diesels have power outputs in the range 2,545 - 5,300 kilowatts

These engines have a reputation for being "a Rolls Royce product" in terms of quality which is ironic because when they were designed, the company was not part of the Rolls Royce organization.

The Bergen B35:40 gas engine has high power and efficiency in the 720-750 rpm class and, is designed for low emissions of NO_x, CO, and UHC combined. It builds on the latest B diesel hardware, specifically redesigned and modified for this gas variant.

Crossley Pielstick range.

Pielstick PA6 STC and PA6B STC

Manufactured under licence by Rolls-Royce plc, these engines are designed and developed specifically to burn heavy residual fuels. the Pielstick PA range of diesels offers cylinder configurations ranging from 6 to 20 and a power range of 1950 to 8910kW.

S.E.M.T Pielstick PC2.6 & PC2.6BThese models are rated for Naval applications to run at 520/600 rpm respectively with power outputs in the 6 to 15 MW range.

External links

* [http://marine.rolls-royce.com/Bergen-B-series-marine-diesel-engines/ Rolls-Royce Bergen B marine diesels]
* [http://marine.rolls-royce.com/Rolls-Royce-C--marine-diesel-engines/ Rolls-Royce Bergen C marine diesels]
* [http://marine.rolls-royce.com/Rolls-Royce-K-marine-diesel-engines/ Rolls-Royce Bergen K series]
* [http://marine.rolls-royce.com/Crossley-Pielstick-marine-diesel-engines/ Rolls-Royce Crossley Piestick marine diesels]