Kumera delivered its first Norgear advanced Multi Step Hybrid Gear for a newbuild Anchor Handling Tug (AHT), contracted by renowned Norwegian tug boat company Buksér og Berging AS. The sophisticated new AHT is designed with a green focus and will harness the latest fuel saving solutions to minimise environmental impact and optimise operations.
Innovative solution for reduction of emission and fuel consumption
Due to new IMO regulations for Environmentally Controlled Areas, alternative propulsion concepts are becoming more and more important. The new environmental regulations require that SOx emissions are reduced to 0.1% from 1.5% pre 2010, and that NOx emissions are reduced to approximately 20% for engines built before 2008 and approximately 24% for engines built before 2011.
To meet these new environmental standards, without compromising efficiency and performance, Kumera Norgear has developed innovative, green technology, focusing on sustainable, powerful and efficient operation.
The Norgear advanced Multi-Step Hybrid Gear is a key component in Buksér og Berging’s vessel. The system is capable of minimising a vessel’s environmental impact, by optimising operations for various running modes. AHT’s and harbour tugs have a much wider range of operating profiles than typical steamers like container vessels, etc. as shown in the below graphs.
–This is almost a purely mechanical solution. Compared to a hybrid solution, which uses an electric engine, we use two diesel engines. We look at the primary operational modes of the tug, optimizing the ships main propulsion engine system to meet these operational modes, meaning that we save fuel and reduce emissions, says Per Arne Haug, MD Kumera Norgear.
Significant fuel savings and emission reductions are possible through this innovative system design, which is based on existing, proven technology. By enabling different operating modes for different tasks a vessel undertakes, Kumera’s Norgear Multi-Step Hybrid Gear can achieve fuel savings up to a level of 40-50% (operation specific).
–The solution with a 2-step gear from Kumera provides our new vessel “BB Power” with a unique diesel mechanical propulsion system with increased flexibility and lower fuel consumption. The Kumera gear will reduce fuel consumption at low power operations and also in DP II mode. We choose Kumera due to long relationship and also their ability to try new technologies, says Vetle J. Sverdrup, Chief Operating Officer in Buksér og Berging.
The project is executed by Kumera Norgear, in close cooperation with Buksér og Berging, as partner in the development of the gear solution.
–Buksér og Berging is a good partner for us. They know Kumera and we know them. Innovation is central to both Buksér & Berging and Kumera’s philosophy. They were the first company with an LNG ferry, and they are now going to be the first company with a 2-step tug. They need high quality solutions that they can rely on and we deliver tailor-made solutions that fulfil our customer’s needs, says Per Arne Haug.