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SEAHORSE 35 - Supervision of High-Spec Handysize Bulk Carrier 35000 DWT "Green Ship of The Future"
Green Ships - (Low Emissions Ships)
The market is shaped by new environmental, security and efficiency demands. Marine Power Ltd. cooperates with ship designers, classification societies, ship owners and shipbuilders in order to construct top quality vessel's with less resistance, lower fuel consumption and reduced emissions.
Marine Power is in charge of the newbuilding supervision of the very first models of The Seahorse 35 "Green ship of the future" which is a modern 35.000 DWT handysize Bulk Carrier, designed in close cooperation with ship-owners with the aim to create a future orientated handysize Bulk Carrier incorporating all existing and known future regulations. To comply with new Emission Control Requirements a Low Sulphur Diesel Oil / Gas Oil system is installed which enables the Seahorse 35 switching from heavy fuel oil to low sulphur fuels.
The Seahorse 35 design is developed with specific focus on:
Beginning of March 2010 the very first ever built Seahorse 35 (35000 DWT) bulk carrier was keel layed at Daoda Shipyard, Qidong, China.
Marine Power carries out the supervision of the construction as well as drawing, maker and technical agreement approvals. Also maker's factories are visited and products are evaluated to ensure that only quality equipment is installed onboard.
This high specification ship has been designed by Carl Bro (basic design) and Hanode (detailed design). Marine Power cooperates close with these two companies and shipyard Daoda Heavy Industries, to ensure that the Owner gets a ship which will be economical, functional and easy to operate. The vessel has PSPC, CSR and Ice Class notation.
The Seahorse 35 "Green ship of the future" is a modern 35.000 DWT handysize Bulk Carrier, designed in close cooperation with ship-owners with the aim to create a futureorientated handysize Bulk Carrier incorporating all existing and known future regulations.
The Seahorse 35 design is developed with specific focus on:
Seahorse 35 is shallow-drafted to maximize cargo-intake in draft-restricted ports. Seahorse 35 is laid out with 5 flush doubleskinned cargo holds, wide hatches and no hopper tanktops, thereby ensuring easy access and storage of cargo in all cargo holds.
Seahorse 35 cargo holds are equipped with CO2 fire-fighting system, A60 fire-insulated engine room bulkhead and natural cargo hold ventilation ensuring safe carriage of a wide range of bulk cargoes. Seahorse 35 is equipped with four 30 mts SWL wire-luffing cargo cranes and four motor-grabs stowed on cross-decks between hatches.
Short turn-around time is achieved by effective cargo hold cleaning by portable washing machines. Outlets of water and compressed air are arranged in all cargo holds at tanktop-level. A permanent washing water return line is arranged in each cargo hold at tanktop level. A portable pheumatic pump can, via the return line, transfer dirty washing water to two cargo hold washing water holding tanks arranged for temporary storage to enable cargo hold cleaning in sensitive and restricted areas.
The complete double-skin configuration ensures easy access to structural inspection, even when the vessel is loaded. Fire main line, hydraulic and FW piping and electrical cables in cargo area are arranged in upper deck pipe ducts to avoid cargo and green water damage and ensure minimum maintenance. A slender afterbody and a high efficient NPT propeller ensures optimal performance with minimum fuel oil consumption. Furthermore a vertical stem design is adopted to improve the fuel efficiency in adverse weather conditions.
Principal dimensions
Length OA, max 180.0 m
Breadth 30.0 m
Depth 14.7 m
Scantling draft 10.1 m
Gross tonnage 24,366
Net tonnage 11,521
Deadweight and cargo hold capacity
DWT at scantling draft 35,000
Cargo hold no 1 7,900 m3
Cargo hold no 2, 3, 4 9,800 m3
Cargo hold no 5 9,400 m3
Total cargo capacity, grain 46,700 m3
Total cargo capacity, bale 45,800 m3
TCP 50 t/cm
Stowage Factor 50 cuft/t
Class notation
Det norske Veritas +1A1 Bulk Carrier ES(D), CSR, BC-A (CH 2&4 empty), GRAB(20), ESP, E0, HA(+), TMON, DG-B, BIS, FUEL (380cSt, 991kg/m3, -15deg), BWM-E(s,f), COAT-PSPC (B), ICE-1C
Speed and consumption
Service speed, loaded 14.0 knots
Service speed, ballast 15.0 knots
Service speed is given at M/E CSR including 15% seamargin.
Fuel consumption
(HFO 380 cSt LCV 40,200 kJ/kg, no MDO at sea)
At sea laden 27.0 t/day
In port working 4.5 t/day
In port idle 1.5 t/day
Endurance min. 18,000 n.m.
Main machinery and equipment
Main engine MAN B&W 5S50MC-C
– SMCR 7,500 kW
– CSR 6,300 kW
Aux Engines 3 x 600 kW
Emergency Generator 110 kW
Ballast pumps 2 x 800 m3/h
Cargo loading
Deck cranes:
4 sets of wire-luffing deck cranes
Safe working load (SWL) 30 t
Max. outreach from CL of vessel 25.0 m
Minimum outreach 4.5 m
Cargo list
Dangerous Goods (B class), Coal, grain, iron ore, cement, alumina, bauxite, mineral sand, salt, steel coils, packaged timber, fertilizer, scrap iron, direct reduced iron, ammonium nitrate, sulphur, saltpetre, seed cake.
Cargo securing
Lashing points on upper deck for securing of cargo on hatch covers.
Lashing point in cargo holds on longitudinal bulkheads for securing of general cargo. Cargo holds fitted with CO2 fire-fighting system and engine room bulkhead is A60 fire-insulated. No fuel oil in cargo area.
Hatch covers
5 sets of end-folding, double-skinned, hydraulic operated steel hatch covers with grain/cement feeder openings.
Hatch opening (LxB)
Hatch no 1 16.0m x 18.7m/15.0m
Hatch no 2, 3, 4 and 5 19.2m x 20.3m
Cargo hold cleaning
2 portable air/water driven combi-guns and 2 portable pneumatic air driven washing water discharge pumps. Permanent SW, FW and compressed air connections in each cargo hold at tanktop level. Permanent washing water return line connected to washing water holding tanks in each cargo hold.
Tank capacities
Heavy fuel oil 1,750 m3
Diesel oil 185 m3
Lub oils 95 m3
Fresh water 250 m3
Ballast water (excl CH 3) 12,900 m3
Ballast water (incl CH 3) 22,700 m3
Washing water holding tanks 220 m3
Fuel oil, ballast and fresh water tanks are equipped with remote tank gauging. All HFO tanks arranged with cofferdams towards shipside in E/R.
Complement
Senior officer class 4
Officer class 6
Petty officer / Rating class 15
Total complement 25
Click here for Seahorse 35 Designer CARL BRO Detailed Illustration (in pdf format)
SEAHORSE 35 Low emission bulk carrier - Concept Study
In the following, made by greenship.org, the main conclusions from the concept studies of The Seahorse 35 are given. The emission reductions achieved are compared with the overall goal of Green Ship of The Future and the extra cost price for the implementation of the green technologies are estimated.
SEAHORSE 35 Bulk carrier, optimised with following technologies:
Water in fuel system (WIF)
Exhaust gas recirculation system (EGR)
Waste Heat Recovery system (WHR)
Exhaust Gas Scrubbers
Ducted/direct air intake for main engine
Optimised coolers and cooling pumps
Auxiliary engine operation on marine diesel oil (MDO)
Speed nozzle/optimized propeller
Twisted spade rudder with Costa Bulb
Installation of Ballast Water Treatment System (BWT)
Goal
30 % reduction of CO2 emissions
90 % reduction of NOX emissions
90 % reduction of SOX emissions
Result
Achieved 7,2 %
Achieved 79,1 %
Achieved 98,6 %
Extra costs due to the above mentioned technologies 3,5 million EURO to approximately 20 million EURO (approximately 20% increase compared to a ‘standard ship’ without ‘green technologies’)
Conclusion in short
With respect to NOX and SOX we have reached our goals.
Reducing NOx and SOX will in some case cost increased CO2 emission.
With respect to CO2 the study shows that we still need to work with technical solutions and operation to meet the goal of a 30 % reduction.
Further reduction in CO2 must be obtained through continued efforts to reduce vessel resistance, optimised operation (slow steaming, weather routing etc), more effective propulsion systems, more fuel efficient engines, alternative fuel (LNG, Biofuel etc) and addition of alternative green means of propulsion (fuel cells, wind, solar etc)
Further reductions in CO2 will also reduce NOX and SOX emissions.
Challenges with retrofitting.
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