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The use of Appropriate Technology in the design of new dredgers ir.Robby de Backer, ir.Frederik Deroo Jan De Nul N.V.

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Presentation on theme: "The use of Appropriate Technology in the design of new dredgers ir.Robby de Backer, ir.Frederik Deroo Jan De Nul N.V."— Presentation transcript:

1 The use of Appropriate Technology in the design of new dredgers ir.Robby de Backer, ir.Frederik Deroo Jan De Nul N.V.

2 APPROPRIATE TECHNOLOGY: Technology or engineering that takes special consideration of its social and environmental ramifications. Traditional view: Simple, efficient technology, using limited resources. Immediately applicable in daily life. Mostly applied to developing countries.

3 APPROPRIATE TECHNOLOGY: Technology or engineering that takes special consideration of its social and environmental ramifications. Applied to Dredging. Use design, materials and equipments with lowest possible social and environmental negative impact in the design and construction of Dredgers. Use design, materials and equipments with lowest possible social and environmental negative impact during the operation of Dredgers. Use operational methods with lowest possible social and environmental negative impact during execution of the project.

4 APPROPRIATE TECHNOLOGY: Technology or engineering that takes special consideration of its social and environmental ramifications. Applied to Dredging. Compliance with the principles of Appropriate Technology Holistic approach. AT = Efficient Dredgers (social aspect ?)

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6 Investment plan (ordered) PROJECT NR.DESCRIPTIONSHIPYARD m3 Hopperdredger AL-IDRISIBuyoung, Korea m3 Hopperdredger VITUS BERINGBuyoung, Korea m3 Hopperdredger CRISTOBAL COLONLa Naval, Spain m3 Hopperdredger LEIV EIRIKSSONLa Naval, Spain 8064Self-propelled Cutter Suction Dredger ( kW) IBN BATTUTAUljanik, Croatia 8065Self-propelled Cutter Suction Dredger ( kW) ZHENG HEUljanik, Croatia 8066Self-propelled Cutter Suction Dredger ( kW) FERNAO DE MAGALHAES Uljanik, Croatia 8067Self-propelled Cutter Suction Dredger ( kW)Uljanik, Croatia 8474Backhoe Dredger (3700 kW) POSTNIK YAKOVLEVXinhe Tianjin, China 8623Side Stone Dumping Vessel (6000 ton) WILLEM DE VLAMINGHBuyoung, Korea m3 Splitbarges (2 units) BOUSSOLE, ASTROLABEXinhe Tianjin, China 8578 to m3 Splitbarges (4 units) CONCEPCION, SANTIAGO,TRINIDAD, VICTORIA Xinhe Tianjin, China m3 Splithopperdredger DE LAPEROUSEXinhe Tianjin, China 8622Fallpipe & mining Vessel ( ton) SIMON STEVINLa Naval, Spain m3 Hopperdredger ALVAR NUNEZ CABECA DE VACAXinhe Tianjin, China m3 Hopperdredger SEBASTIANO CABOTOXinhe Tianjin, China m3 HopperdredgerLa Naval, Spain 8582 to m3 Splitbarges (4 units)Xinhe Tianjin, China

7 APPROPRIATE TECHNOLOGY: Technology or engineering that takes special consideration of its social and environmental ramifications. Applied to Dredging. Design and construction of a Dredger. –Conceptual design. –Material selection. –System design. –Energy & emissions. Operational methods of a Dredger. –Optimal fleet management. –Rules & regulations. –Cost.

8 APPROPRIATE TECHNOLOGY: Technology or engineering that takes special consideration of its social and environmental ramifications. Applied to Dredging. Design and construction of a dredger: Conceptual Design: EFFICIENCY, APPLICATION OF MODERN DESIGN TOOLS, ADVANTAGE OF YOUNGER VESSELS

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12 Specific Power [kW/kn*ton] for hopperdredgers 2000 to 5000 m3

13 Specific Power [kW/kn*ton] for Jumbo hopperdredgers

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15 Ratio Deadweight/Light Ship Weight for Jumbo Hopperdredgers

16 Ratio Light Ship Weight/L*B*H for Jumbo Hopperdredgers

17 APPROPRIATE TECHNOLOGY: Technology or engineering that takes special consideration of its social and environmental ramifications. Applied to Dredging. Design and construction of a dredger: Conceptual Design: EFFICIENCY, APPLICATION OF MODERN DESIGN TOOLS, ADVANTAGE OF YOUNGER VESSELS Material Selection: CRITERIA FOR AT COMPLIANCE ARE REQUIRED

18 APPROPRIATE TECHNOLOGY: Technology or engineering that takes special consideration of its social and environmental ramifications. Applied to Dredging. Design and construction of a dredger: Conceptual Design: EFFICIENCY, APPLICATION OF MODERN DESIGN TOOLS, ADVANTAGE OF YOUNGER VESSELS Material Selection: CRITERIA FOR AT COMPLIANCE ARE REQUIRED System Design: EFFICIENCY

19 APPROPRIATE TECHNOLOGY: Technology or engineering that takes special consideration of its social and environmental ramifications. Applied to Dredging. Design and construction of a dredger: Conceptual Design: EFFICIENCY, APPLICATION OF MODERN DESIGN TOOLS, ADVANTAGE OF YOUNGER VESSELS Material Selection: CRITERIA FOR AT COMPLIANCE ARE REQUIRED System Design: EFFICIENCY Energy & Emissions: EFFICIENCY

20 APPROPRIATE TECHNOLOGY: Technology or engineering that takes special consideration of its social and environmental ramifications. Applied to Dredging. Operation of a Dredger: Optimal fleet management: USE THE MOST APPROPRIATE DREDGER

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22 VesselABC Hopper Capacity [m 3 ] Dredging draught [m] Deadweight at dredging draught [ton] Project parameters Dredged spoil:medium to fine sand, D 50 =150 mu Dredging depth:15 m Sailing distance from dredge site to disposal site:15 Nautical Miles Disposal method:Bottomdoor dumping Total amount of spoil to be dredged: m 3 Maximum loaded draught due to local constraints:8 m VesselABC Weekly production 100%75%48% Cost100%91%120% Project duration100%133%206% Total amount of fuel consumed for project 100%83%96%

23 APPROPRIATE TECHNOLOGY: Technology or engineering that takes special consideration of its social and environmental ramifications. Applied to Dredging. Operation of a Dredger: Optimal fleet management: USE THE MOST APPROPRIATE DREDGER Regulations: HOLISTIC APPROACH, USE OBJECTIVE PARAMETERS

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26 Project parameters Dredged spoil:medium to fine sand, D 50 =150 mu Dredging depth:15 m Sailing distance from dredge site to disposal site:15 Nautical Miles Disposal method:Bottomdoor dumping Total amount of spoil to be dredged: m 3 VesselA Hopper Capacity [m 3 ]11300 Dredging draught [m]9.10 Deadweight at dredging draught [ton] Vessel A, loading without overflowing Vessel A, loading with overflowing Weekly production100%167% Cost100%61% Project duration100%60% Total amount of fuel consumed for project 100%60%

27 APPROPRIATE TECHNOLOGY: Technology or engineering that takes special consideration of its social and environmental ramifications. Applied to Dredging. Operation of a Dredger: Optimal fleet management: USE THE MOST APPROPRIATE DREDGER Regulations: HOLISTIC APPROACH Cost: COST OF SIDE-EFFECTS TO BE TAKEN INTO ACCOUNT ?

28 APPROPRIATE TECHNOLOGY: Technology or engineering that takes special consideration of its social and environmental ramifications. Applied to Dredging. CONCLUSIONS New design tools needed. Holistic principle. Importance of a modern, versatile fleet.

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