Energy consumption and minimising emissions into the air

Viking Grace uses completely sulphur-free liquefied natural gas (LNG) as fuel. All other Viking Line ships use diesel fuel that contains less than 0.1 weight percent of sulphur in accordance with the sulphur directives.

Viking Line has an internal programme for reducing exhaust fume emissions. Within this programme, the crews of the ships and Viking Line’s technical department develop ways to operate the ships more fuel-efficiently.

M/S Mariella and M/S Gabriella get their electricity from ashore when they are in port in Helsinki and Stockholm. This reduces emissions into the air as well as engine noise in the port area.

Viking Line has focused on reducing nitrogen oxide emissions. Two ships use technical solutions to reduce emissions. Viking Cinderella has been equipped with catalytic converters and Mariella with Humid Air Motor technology (HAM). 

Humid Air Motor (HAM)

HAM is a globally unique system that reduces nitrogen oxide emissions by lowering the combustion temperature of the engines. Vaporised sea water is added to the combustion process, which lowers the temperature.

Selective catalytic reduction (SCR)

SCR is a process through which nitrogen oxides become pure nitrogen gas and water vapour. The catalytic converters used on ships normally use liquid urea as an additive (urea consumption approximately 15 g/kWh).