Rolls-Royce expands variable-speed marine gen-sets

Rolls-Royce is expanding its range of variable-speed mtu generator sets with standardized gen-sets based on the Series 2000. The company now offers variable-speed gen-sets in 8V, 10V, 12V and 16V models.

The new standardized, variable-speed gen-sets have a compact design and high-power density suited for vessels with limited space and weight constraints. (Photo: Rolls-Royce)

Standardized gen-sets based on the Series 2000 have an operating speed range of approximately 1,200 to 2,450 rpm, depending on the engine type, and an electrical output of 650 to 1,850 kWe, enabling optimal adaptation to different load profiles including modern, battery-powered marine applications and as a range extender. Their compact design and high power density make them suited for vessels with limited space and weight constraints, such as passenger ferries, crew boats, offshore supply vessels, yachts and patrol boats.

The gen-sets are designed to adjust their engine speed to match actual power demand, which the company said reduces fuel consumption and CO₂ emissions during operation by up to 15% compared to fixed-speed units. At the same time, they operate about 6 dB quieter than conventional units.

The units are also designed to provide longer intervals between overhauls (TBO) and lower maintenance costs over their lifecycle.

New exhaust aftertreatment system

Rolls-Royce also announced the launch of a new exhaust gas aftertreatment solution that complies with IMO Tier III emissions standards. The system is being certified in collaboration with xhaust gas aftertreatmen specialist Eminox for Series 2000 MTU engines.

The new exhaust gas aftertreatment solution for Series 2000 MTU engines. (Photo: Rolls-Royce)

Exhaust gas aftertreatment using selective catalytic reduction (SCR) will enable offshore supply vessels, ferries and patrol boats fitted with engines from the mtu Series 2000 to operate in emission-regulated maritime areas, such as the North Sea and Baltic Sea, Rolls-Royce commented. The SCR system is reported to reduce nitrogen oxide emissions by 75% compared with the IMO II limits.

The new solution is designed for a service life of up to 16,000 operating hours, depending on the load profile. It requires no compressed air for dosing and can be flexibly integrated into various ship designs.