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The use of Appropriate Technology in the design of new dredgers ir

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Presentation on theme: "The use of Appropriate Technology in the design of new dredgers ir"— Presentation transcript:

1 The use of Appropriate Technology in the design of new dredgers ir
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 2007-2011 (ordered)
PROJECT NR. DESCRIPTION SHIPYARD 8023 7500 m3 Hopperdredger “AL-IDRISI” Buyoung, Korea 8030 7500 m3 Hopperdredger “VITUS BERING” 8025 46000 m3 Hopperdredger “CRISTOBAL COLON” La Naval, Spain 8031 46000 m3 Hopperdredger “LEIV EIRIKSSON” 8064 Self-propelled Cutter Suction Dredger ( kW) “IBN BATTUTA” Uljanik, Croatia 8065 Self-propelled Cutter Suction Dredger ( kW) “ZHENG HE” 8066 Self-propelled Cutter Suction Dredger ( kW) “FERNAO DE MAGALHAES” 8067 Self-propelled Cutter Suction Dredger ( kW) 8474 Backhoe Dredger (3700 kW) “POSTNIK YAKOVLEV” Xinhe Tianjin, China 8623 Side Stone Dumping Vessel (6000 ton) “WILLEM DE VLAMINGH” 8576 8577 3700 m3 Splitbarges (2 units) “BOUSSOLE”, “ASTROLABE” 8578 to 8581 1800 m3 Splitbarges (4 units) “CONCEPCION”, “SANTIAGO”, “TRINIDAD”, “VICTORIA” 8032 3700 m3 Splithopperdredger “DE LAPEROUSE” 8622 Fallpipe & mining Vessel ( ton) “SIMON STEVIN” 8033 3400 m3 Hopperdredger “ALVAR NUNEZ CABECA DE VACA” 8034 3400 m3 Hopperdredger “SEBASTIANO CABOTO” 8035 30500 m3 Hopperdredger 8582 to 8585 3700 m3 Splitbarges (4 units)

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 Deadweight at dredging draught [ton] 18600 11800 8130
Vessel A B C Hopper Capacity [m3] 11300 7500 4400 Dredging draught [m] 9.10 8.15 7.30 Deadweight at dredging draught [ton] 18600 11800 8130 Project parameters Dredged spoil: medium to fine sand, D50=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: m3 Maximum loaded draught due to local constraints: 8 m Vessel A B C Weekly production 100% 75% 48% Cost 91% 120% Project duration 133% 206% Total amount of fuel consumed for project 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 Deadweight at dredging draught [ton] 18600
Vessel A Hopper Capacity [m3] 11300 Dredging draught [m] 9.10 Deadweight at dredging draught [ton] 18600 Project parameters Dredged spoil: medium to fine sand, D50=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: m3 Vessel A, loading without overflowing Vessel A, loading with overflowing Weekly production 100% 167% Cost 61% Project duration 60% Total amount of fuel consumed for project

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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