Volvo Penta has launched a new engine and aftertreatment concept to comply with the forthcoming implementation of IMO Tier III standards.
The solution is based on both the company’s own experience along with expertise from the Volvo Group in leading selective catalytic reduction (SCR) technology, resulting in a system that is dedicated to heavy-duty marine operations. New emissions restrictions for vessels entering the Baltic Sea and North Sea will be implemented in 2021. The International Maritime Organization (IMO) Tier III regulation will stipulate a reduction in nitrogen oxides (NOx) emitted of around 70 per cent – depending on engine size – when compared to current IMO Tier II levels.
Speaking at Nor-Shipping 2017, Johan Carlsson, Volvo Penta’s chief technology officer said: “Our new concept is designed with features and components to withstand the toughest marine environment. In complying with IMO Tier III requirements, Volvo Penta will meet international emissions standards, offering a truly global solution.”
Volvo Penta’s solution for IMO Tier III is optimised for marine use, and uses SCR technology for the exhaust aftertreatment system.
Volvo Penta is initially launching its IMO Tier III solution for its 13-litre models as the range is used for a wide variety of marine applications. It will be available for inboard engines and the Volvo Penta Inboard Performance System (IPS) package (with a power output of 294-588 kW), auxiliary engines (ranging from 294-441 kW), and gensets (ranging from 300-400 kW). The reduction in NOx will go from current permitted levels of 7.7 g/kWh down to 2 g/kWh.
Volvo Penta’s IMO Tier III solution exceeds stipulated emissions limits in reducing NOx by up to 75 per cent. It is a simple robust design, with an SCR solution that has been adapted and optimised for marine customers.
Exhaust gases are mixed with urea/DEF (diesel exhaust fluid) in the SCR unit. There is a separate urea injector pipe. The two alternative exhaust outlets are designed for marine standards and will provide customers with different possible SCR configurations, leading to ease of installation. The DEF tank is designed to hold enough urea for 3,200 litres of fuel, and there are sensors to check the urea levels and quality; it also includes a dosage pump and control unit. For Volvo Penta IPS, there are also specific features, such as the exhaust bend, to ensure ease of installation and operation.
Wärtsilä 31 to power new fuel-efficient vessel
A new state-of-the-art pelagic trawler will be the latest vessel to be fitted with a Wärtsilä 31 main engine.
The vessel has been ordered by Research Fishing Co based in Lerwick, Shetland Islands. The order with Wärtsilä was booked in April 2017. There is an option for a second vessel.
In specifying the Wärtsilä solutions, the customer cited the need for the latest technologies in order to optimise the total efficiency of the vessel. The Wärtsilä 31 engine has been recognised by Guinness World Records as being the world’s most efficient 4-stroke diesel engine. This will be the first 12-cylinder version of this engine ordered.
In addition, Wärtsilä will supply the gearbox, the controllable pitch propeller with the Wärtsilä ProTouch propulsion control system, as well as one 8-cylinder and one 6-cylinder Wärtsilä 20 auxiliary engines. Delivery of the Wärtsilä equipment is scheduled to commence in November 2017.
“The Wärtsilä 31 engine is in a class of its own regarding fuel efficiency and total cost of ownership. Its efficiency reduces exhaust emission levels, and provides extended intervals between service requirements. We are proud to have been selected to provide a complete package of solutions for this extremely modern fishing vessel,” says Stefan Wiik, vice president, engines, Wärtsilä Marine Solutions.
“This vessel has been designed to meet our needs well into the future. For this reason the machinery onboard has to be the best available, and we believe that by selecting Wärtsilä this requirement is achieved,” says Gary Williamson, skipper & co-owner.