Emulsified fuel solution for first J-ENG UEC35LSJ order

The order for a monofuel 6UEC35LSJ type engine was placed in connection with a 17,500dwt coastal carrier under construction by Onomichi Dockyard Co., Ltd. The vessel, which was ordered by Japanese shipowner MOL Dry Bulk Co., Ltd., is scheduled to enter service in 2022.

The UEC35LSJ shares the same technology concept with J-ENG’s previously announced 500mm bore UEC50LSJ engine platform. The JUMP (J-ENG Unique Marine Power) monofuel solution offers capital cost savings along with fuel efficiencies of around 5% compared with previous J-ENG engines.

The engine’s fuel efficiency at slower operating speeds has been improved, while the SFOC is understood to be close to the 157 g/kWh targeted for 6UEC42LSJ at maximum rating.

The engine also features J-ENG’s stratified fuel injection solution, which will permit optimised fuel oil consumption and minimise NOx emissions. The layered injection system is a technology that can inject two different types of liquid fuel in layers from one fuel valve. While the MGO-fuelled engine will feature the injection of water with MGO, the technology can also be applied to mixed combustion of various carbon-free alternative fuels such as ammonia and biofuels. J-ENG notes that the technology has significant potential to lead to further reductions of GHG emissions in the future.

The Motorship originally reported on J-ENG’s plans to develop an MGO mono-fuel version in 2019, when development work was expected to follow the delivery of the first UEC42LSH. The new order is for a 350mm-bore engine, rather than the 420mm-bore originally anticipated for the first delivery.