Yanmar Marine International has introduced a new Selective Catalytic Reduction (SCR) system, designed to cut NOx emissions from vessels with engines exceeding 130kW in Emission Control Areas (ECAs).
The new SCR system meets the International Maritime Organization’s (IMO) Tier III emission standards which apply to marine diesel engines operating in ECAs, with the system providing a 60-90% reduction of NOx, depending on loading conditions and temperature.
The system, which weighs 86kgs, can be fitted to commercial vessels or to leisure vessels over 24 metres in length.
The system is not intended for use in the USA.
The emissions control system, paired with the common rail technology used in Yanmar’s combustion engines, uses a number of sensors to measure temperature and NOx before it enters the catalyst.
Reduced emissions
An ECU calculates the correct volume of Diesel Exhaust Fluid (DEF), (AdBlue) which needs to be injected, which then binds with the NOx, reducing emissions down to near-zero levels.
The system pairs with Yanmar’s 6LY series of engines, between 400-440hp.
“What we have created with this SCR system is an easier and simpler way to significantly reduce NOx emissions,” said Bas Eerden, Yanmar global sales manager
“The system’s uses go beyond adhering to regulations and utilises the latest technology to make a very significant reduction in emissions, which is the aim of all our solutions.
“This is in line with the Yanmar Green Challenge initiative to reduce emissions globally.”
For colder regions with the Emission Control Areas, such as the Nordics and Baltics, Yanmar offers an optional heater kit for the Diesel Exhaust Fluid (DEF) to remain at a certain temperature to prevent crystallisation which occurs at -13 degrees Celsius.
