Wärtsilä is to supply the engines for a new LNG fuelled research vessel âAtairâ? being built for the German government. Wärtsilä will also supply exhaust cleaning systems based on selective catalytic reduction (SCR) technology and the LNGPac system for complete fuel gas handling.
The full scope of Wärtsiläâs supply for the âAtairâ is two 6-cylinder Wärtsilä 20DF dual-fuel engines capable of running on either LNG or conventional liquid fuels, one 6-cylinder Wärtsilä 20 engine, two exhaust cleaning systems, and a Wärtsilä LNGPac fuel storage, supply, and control system.
The engines will have Tier III classification since the dual-fuel engines comply with this classification when running in gas mode, and all the engines will be compliant when operating on diesel because of the Wärtsilä SCR systems. Furthermore, the engines will be double elastically mounted to minimise the noise. This special Wärtsilä technique will enable the ship to fulfil the DNVGL classification societyâs âSilent Râ rating, thus allowing the sonar equipment to be used without disturbance from underwater radiated engine noise.