Green Dolphin 38
– from concept design to orders
The new bulk carrier concept design Green Dolphin 38, launched summer 2012, has now been ordered by a number of ship owners at several yards in China. Letters of Intent have also been signed for several more series, indicating that more contracts will follow shortly. by Per Wiggo Richardsen
The Green Dolphin 38 concept design was launched at the prestigious Posidonia event in Greece last summer. The design is a Handysize bulk carrier that fulfils the four main objectives of being Fuel Efficient, Robust and Reliable, Operationally Flexible and able to meet both current and future Environmental Regulations.
The hull was designed by SDARI and DNV to provide superior performance at different draughts and speeds. Through extensive use of Computational Fluid Dynamics (CFD), a hull with very low resistance was designed. When combined with a long-stroke engine and large propeller, the result is an impressively low fuel consumption of 17.7 t/day at 14 knots and only 6.4 t/day at an Eco speed of ten knots.
The concept design has now been ordered by a number of ship owners at several yards in China. Letters of intent have also been signed for several more series, indicating that more contracts will follow shortly.
Two of these ships have already been chartered out to Western Bulk, which is not only a large operator currently controlling over 140 ships, but is also known for applying its analytical and risk-based approach when selecting vessels with superior performance.
The final hull shape was tank tested at HSVA in Hamburg, Ger- many in December last year. A full matrix of draughts and speeds was tested, and the results of the tank tests showed the very low wave-making of the hull and verified the resistance and fuel consumption esti- mates provided by SDARI.
“It’s interesting to note that the results of the tank tests at HSVA are very similar to DNV’s CFD calculations, in particular for the design and scantling draft, where the deviations are within an acceptable confidence interval of about 2–3 per cent, ” comments Michael Aasland, Busi- ness Director for Bulk Carriers in DNV. He adds: “DNV is uniquely positioned to ensure that the ships built to DNV class will perform as intended based on the extensive CFD calculations of the hull shape. We are also in the process of pilot- ing a new service called DNV’s Build2De- sign, where we follow up a number of key parameters during construction in order to ensure that hydrodynamic efficiency is as high as designed.”