Bergen B-gas engine

Rolls-Royce provides a range of spark ignition (SI) gas engines based on its B- and C- engine platforms in the power range between 1.460 - 9,300 kWe. These engines are well established in the market and are highly competitive in terms of efficiency and emissions.

However, due to market demand for larger engines, we developed the most powerful gas engine that our biggest engine platform, the B32:40, would support, exploiting the best technology from our latest KV-G4 engine version in a way that will create a new and class-leading product for the 720rpm to 750rpm range.

Increased power range

This was achieved by basing the new design on our largest engine platform, the B32:40, extending it to 350 mm, and by making the new engine in versions up to V-20.

Higher efficiency

This means lower gas consumption for the power produced and therefore lower operating costs. Key factors in achieving this are that the B-gas utilises an advanced thermodynamic cycle, has an optimised combustion system, advanced turbochargers with variable turbine geometry, as well as an efficient mechanical design that runs at relatively low speed.

Reduced emissions

Achieved through further developments of the well-known Bergen lean-burn combustion system based on spark ignition in a small pre-chamber, in combination with the advanced thermodynamic cycle mentioned above.

Increased availability

The larger and slower-running B-gas engine has an natural advantage over smaller faster-running engines. However, the high availability is primarily founded in a simple and robust engine design, which has been thoroughly tested and is built to the highest quality standards.

Reduced service cost per kWh

This is due to the simple and robust design of the BV - gas engine, with fewer parts subject to wear, relatively low speed as well as the generous sizing of parts and larger wear margins. Therefore the intervals between overhauls can be longer, giving a lower service cost per produced kWh.

Wide fuel-gas specifications

This remains a factor not to be overlooked, and in being an "Otto cycle" Lean Burn S.I. engine with a fully bore-cooled combustion space, the BV - gas has low anti-knocking requirements compared to alternative gas engine types.

Stationary engines - Gas 
Bergen B35:40VAG - 60/50Hz

Principal dimensions 
Cylinder diameter 350 mm. Piston stroke 400 mm