5 April, 2012 MAN Diesel & Turbo successfully completed the takeover of Kappel propeller – including designs, software, and intellectual property together with continued co-operation with Mr Jens Julius Kappel at end March.
The move will allow the manufacturer to integrate the Kappel tip fin propeller blade designs for both controllable pitch propellers and fixed pitch propellers in to its MAN Alpha propeller programme, thereby resulting in fuel-saving and energy-efficient propulsion. Compared to conventional designs, the Kappel propeller blade designs are said to offer fuel savings by up to 6% related to the blade design alone, without relying on improvements with other components – such as e.g. a rudder bulb integrated with propeller and rudder.
‘The energy-saving technology, which MAN Diesel & Turbo now owns – will be matured and implemented in a greater variety of customer solutions including hydrodynamic integration of rudder bulbs, high-efficiency rudders, hull’s flow-guiding devices and ducts, ’ says MAN Diesel & Turbo, adding that in today’s market green technology, fuel-savings, energy optimisation and increased propulsion efficiency are more important than ever – for both new ship designs and for existing ships’ retrofit and upgrade solutions – particularly as they contribute to lowering the EEDI (Energy Efficiency Design Index) of ships.
Furthermore, compared to a conventional design the Kappel propellers have shown lower pressure impulses which can be utilised for bigger and more efficient propellers because of the reduced clearance between hull and propeller tip. Combined with the G-type MAN B&W engine, further improvement in propulsion efficiency can be exploited. The new ultra-long stroke low-speed G-type has a longer stroke and lower engine speed with increased engine efficiency – and deploys a larger and more efficient propeller for tomorrow’s energy-optimised aft ship designs. In that combination fuel consumption and CO2 emission are reduced by up to 10%.