Cost Effective Solution For Shallow Water Maintenance Dredginginmarco.in/images/53AAnkit Ghosh_COST...
Transcript of Cost Effective Solution For Shallow Water Maintenance Dredginginmarco.in/images/53AAnkit Ghosh_COST...
VEDAM DESIGN
INDIA | UAE | NETHERLANDS
www.vedamdesign.com
Cost Effective Solution
For Shallow Water
Maintenance Dredging
EADA - 2018
Ankit Ghosh
Naval Architect
OUTLINE
Vedam Background
• Vedam Services
• Track Record
Introduction
• Overview : Indian Dredging scenario
• Requirement of Maintenance Dredging
New Construction
• Shallow Draft Maintenance TSHD
Conversion
• GC to TSHD
• Commercial & Technical Challenges
Conclusion
An ISO 9001-2015 certified.
Offices in India | UAE |
Netherlands.
Experienced Team of 80
Professionals (Naval Architects,
Marine & Electrical Engineers,
Mechanical & Structural
Engineers)
650+ Projects in around 30
Countries.
Brief background
MarineDesign solutions for Seagoing,
Coastal and Inland Vessels.
OffshoreEngineering services for Offshore
Vessels and Platforms.
DredgingInternational Team with Experience of
end-to-end Dredging Solutions.
GasDesign Solution for the Marine
Applications of/for Gas (LNG, CNG,
LPG)
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on
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on
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ProjectShipyard
Location
Scope
Co
nce
pt
Ba
sic
Engg
Equip
Intg
.
Re
tro
fit
Site
Su
pe
rvis
ion
Pro
ject m
ngt
20inch Cutter Suction Dredger, 16m depth India O O O
18inch Cutter Suction Dredger, 14m depth India O O
20inch Cutter Suction Dredger, 20m depth India O
14inch Self Propelled CSD, 6m depth India O
2400CBM TSHD Europe O
Upgradation of 7000CBM TSHDs x 4 India O
Upgradation & Flag change of 2500 CBM TSHD India O
Conversion of General Cargo to TSHD Europe O
90 CBM Shallow water TSHD Middle East O
Conversion of Ore Carrier to Split Hopper Barge India O O O
Track Record
in Dredging
20inch Cutter Suction
Dredger
DREDGE FEATURES Power : 180kw
Maximum speed : 35rpm
PRINCIPAL PARTICULARS
ENGINE INSTALLATION DECK MACHINERY
DREDGE FEATURES Power : 180kw
Maximum speed : 35rpm
PRINCIPAL PARTICULARS
ENGINE INSTALLATION DECK MACHINERY
7
18inch Cutter Suction
Dredger
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Dredger Details• Length: 82.8 m
• Breadth: 16.0 m
• Loading Capacity:3650 MT
• Hopper Capacity: 2400 CBM
• Dredging Depth: 25 m
• Owner: Dutch
• Type: Trailer
Suction
Hopper Dredger
NEW BUILD-TSHD
Vedam Background
• Vedam Services
• Track Record
Introduction
• Overview : Indian Dredging scenario
• Operational requirement
New Construction
• Shallow Draft Maintenance TSHD
Conversion
• GC to TSHD
• Commercial & Technical Challenges
Conclusion
Introduction
• Boost for infrastructural development of minor ports & inland jetties
• Channels & banks affected by heavy sedimentation.
• Key minor Ports affected by lack of proper breakwaters.
• LAD for the waterways/coastal water fronts has to be maintained at all times for
effective logistics.
• Timely maintenance dredging is a necessity & unavoidable.
Source: IWAI
Dredge Scenario
• In near future, both capital and maintenance dredging will dominate
the market.
• In long run, peak increase in demand for maintenance dredgers for
shallow depth operations.
• Existing Fleet of dredgers mostly cater to requirements of major
ports.
• Shortfall to meet demand for shallow water maintenance dredgers.
Way Ahead?
• Cost Effective Dredgers (CAPEX & OPEX)
• Optimized for Indian Dredging Conditions
• Smaller units, more in numbers, Quick supply
• Better ROI
• Solution:
• ‘Make in India’
• ‘Modify in India’
Ops Requirement
• High Current
• Narrow channel width
• Limited draft
• Air Draft Restrictions
• Dredge depth limited to ~3-14 m
• Training for maintenance engineers/ operators for
the Indian dredge conditions.
• Economically viable (OPEX)
Source: dredgetoday.com
Vedam Background
• Vedam Services
• Track Record
Introduction
• Overview : Indian Dredging scenario
• Operational requirement
New Construction
• Shallow Draft Maintenance TSHD
Conversion
• GC to TSHD
• Commercial & Technical Challenges
Conclusion
New Construction
• Given sufficient time & CAPEX, New
build an easy choice.
• Driven by the conditions prevailing in
the Indian waters, customized solution
can always be provided.
• Low cost, high maneuverability, shallow
depth dredging capability ideal.
CONSTRUCTION: COST WISE BREAK UP
Design
Hull
Marine Sys.
Dredge Sys.
MAIN PARTICULARSLength overall (Ladder raised) 26.5 m
Length of pontoons 17.5 m
Beam 5.2 m
Depth 1.6 m
Draft 1.0 m
DREDGING FEATURESDredging Depth 12 m
Dredge Pump 447 kW
Mixture Capacity 678m3/hr
Production Capacity-Coarse Sand 136 m3/hr
Discharge Length 1500 m
Discharge pipe Diameter 250 mm
Suction pipe Diameter 250 mm
POWER INSTALLED
Total Installed Power(KTA 19M)447 KW @ 1800
RPM
Gear Box 1.96 : 1
HPP + Alternator 100kW
CUTTER FEATURESCutter Power 35 kW
Cutter Diameter 1000 mm
RPM 0-35
LADDER & SWING WINCHES
Ladder Winch60 KN @ 0-20
m/min
Swing winch40 KN @ 0-20
m/min
Swing width @ 45deg 32m
CombiSnijder – 250DM
• Suitable design can be a 90-400 CBM shallow draft TSHD of 25-40m length.
• Can be Twin Screw vessel for easy operation.
• Should be designed for shallow draft dredging.
• Can have provision of shore discharge line or side discharging
New Construction
Vedam Background
• Vedam Services
• Track Record
Introduction
• Overview : Indian Dredging scenario
• Operational requirement
New Construction
• Shallow Draft Maintenance TSHD
Conversion
• GC to TSHD
• Commercial & Technical Challenges
Conclusion
Conversion
• Cost Effective Solution
• Short lead time
• Owners can convert/upgrade existing vessels to meet
requirements
• Ban In mining industry opens up doors to ready availability of
vessels (Goa barges, mini BC ) for conversion.
• Detailed feasibility to choose best suited candidate for
conversion
Conversion
• Fwd Pump Room
• Outbd Buoyancy Compartment*/FO Tanks
• One Suction Arm & Hoisting arrangement
• Bottom Doors/ Discharge outlets
LAYOUT
TYPICAL LAYOUT :
TSHD
Conversion
TYPICAL LAYOUT : GC
•One Big Cargo Hold For Project Cargo
•Wing Tanks as Ballast Tanks
•Fwd Store Room
•ER in AftLAYOUT
Structural Integrity
Dredge Equipment
Ship system & M/C
compartment
• Conversion can split down to following for detailed study.
Conversion
Major Changes
Add. of sloping plates
Bottom Door Access
Minor Changes
Hatch Coamings modification
Additional Stiffening of Hopper Tanks
No Changes
Side Shell Thickness
Bottom Shell Thickness
Conversion
Hopper Tank(New)
Hopper slant plate
Bottom Door
• Split open for discharge
can also be a viable
option.
Conversion
• Know-how on the
mechanism & operation
of the equipment.
• Selection of dredge
equipment as per
needed production rate.
• Ease in integration with
existing hull.
• Category A machinery
space for dredge
engine & supporting
Aux. systems.
• Hydraulic system for
related item is a critical
factor for the design.
Conversion
Hopper Tank (New) Pump room (New)
Gen. room
(New)
LAYOUT POST CONVERSION
Hopper Tank (New) Pump room
(New)
Conversion
Compartments
• Pump room
• Generator Room
• Buoyancy Compartments*
• Additional FO Tanks
Structure
• Sloping plates For Hopper
• Additional Stiffening for Hopper Tanks
• No/Minor Changes in deck house
Machinery
• Additional Generators (2* No. 0f 800-1000 kW) Each
• No/Minor Changes in propulsion
Dredging Equipment
• Dredge/Jet Pumps
• TS Pipes/Drag Head
• Bottom Doors
• Overflow Control System
Project Execution
Dry Cargo Ship Before Conversion
Dry Cargo ship after Conversion to
TSHD
Fitting of inner side shell in
progress
• LBP: 86 m
• Hopper Capacity: 1500 Cub. M
• Bottom Doors : 4 in No.
• Down Time for conversion: 4 Months
• Conversion carried out in Europe
• Life of Converted Dredger: 15-20 Years
• Cost of Conversion: 50%-75% cost effective
Project Execution SPLIT HOPPER BARGE
Conclusion
• Answer to gap in demand: New build or conversion (Where existing
may not fit)
• Cost Effective New build : small size THSD
• Cost effective conversions : Inland SP barges
• Importance has to be given to selection of dredge equipment
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