2008 DK GROUP NETHERLANDS BV ALL RIGHTS RESERVED

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1 DK Group A new age of innovation: Efficiency optimization's vital role in an era of economic downturn and high fuel prices by Johannes Johannesson, Naval Architect 1

2 Introducing DK Group DK Group Marine Innovators at a glance Established in 2000, DK Group develops and markets fuel saving technologies to the global shipping industry DK Group has developed a unique and patented technology for the commercial shipping industry, the Air Cavity System (ACS) Numerous tank tests support bunker consumption reduction of 5% to 15% from applying the ACS technology on different vessel types Tests are carried out together with leading market participants and potential customers Savings translate directly into financial benefits as well as a cleaner environment from reduced CO 2 emission and other greenhouse gasses 2

3 ACS technology overview What is the Air Cavity System (ACS)? Compressor Air Cavity 3

4 ACS technology overview Schematic transverse section Compressor Air Cavity 4

5 Introducing DK Group 7 years of development 7 years of development, years of tank tests and a recent full-scale sea trial documents a bunker consumption reduction from applying the ACS technology on different vessel types. AIR CAVITY SYSTEM 5

6 ACS Demonstrator ACS Demonstrator the first vessel with ACS ACS trials Build in 1975 at Sietas Schiffswerft in Germany, B.No. 697 Dry Cargo Converted in 2008 with ACS at Gryfia Repairyard in Poland Mini Bulker 2800 DWT Length 81.0m Breadth m Draft 5.80 m Speed 12 knots 2,700 DWT, 83 m LOA 6

7 ACS trials ACS Demonstrator full scale trials Purpose: Demonstration of the concept Confidence of scaling method for the model tests Making test at a high Reinoldsnumber. Real life test of the Automation system for the cavities. ACS Demonstrator is a model for VLCC. 7

8 ACS trials ACS Demonstrator sea trial in Oslo fiord 8

9 ACS trials ACS Demonstrator sea trial in Oslo fiord Sea trials conducted with and without ACS FORCE and Germanischer Lloyd performed sea trials in accordance with standard procedures ACS demonstrator tests included: Speed trials in calm water Speed tests in waves Maneuvering tests Environmental conditions of waves and ocean current documented by wave buoy. Based on the sea trial results with ACS, the scaling procedure for ACS will be established and more reliable results for large ocean-going ships can be conducted. 9

10 ACS trials Reinoldsnumber and Scaling Model tests made with 8m model in Scale 1:10 as ACS Demonstrator Model test using 8m model of ACS Demonstrator as model for VLCC Scale 1: Model test using ACS Demonstrator as model for VLCC scale 1:4 Cf (*1,000) 3 8 m model Full scale tests as ACS Demonstrator 2 83 m coaster 1 Full scale 0 1.E+06 1.E+07 1.E+08 1.E+09 1.E+10 Re 10

11 ACS trials Automation of the Air Cavity System The ACS system is a part of the vessel and should not increase the complexity in the vessels operation Development of suitable sensors Development of automation strategy Reliability of the automation system. 11

12 ACS trials Automation of the Air Cavity System The vessel is rolling approx -8 deg to 8 deg. The sensors are able to measure the water level inside the cavity. The system reacts immediately on escape of air. The system keeps the water level constant despite of movement of the vessel. 12

13 ACS trials Conclusions after the tests of ACS Demonstrator The measured savings from the trials confirms earlier statements. The effect from the ACS is scalable from model to ships. The cavities are more stable on the ship than on the model. The cavities are possible to control automatically. ACS Demonstrator is sailing with the system under normal operation. 13

14 Q&A Thank you for your attention For more information go to 14