Hybrid Reefer
2
48 THE NAVAL ARCHITECT MAY 2003 A PPROACHING completion at the Portuguese builder Estaleiros Navais de Viana do Castelo (ENVC) is a highly interesting hybrid reefer ship, Carmel Ecofresh. This flexible vessel is for the transport of fresh goods - or cars as an alternative - in a large refrigerated cargo hold amidships and containers fore and aft in conventional holds. The versatile design, understood to have been carried out by the German consultant Schiffko working to a concept originally developed by International Maritime Advisers, of Copenhagen, was discussed in detail in The Naval Architect November 2001, page 6, and November 2002, page 33. Two 15,000dwt vessels have been ordered for the German company Horizont Schiffahrtsgesellshaft, to be operated by Agrexco, of Israel, and the first is expected to be delivered in September this year. A combination of cargo-carrying possibilities of this ship make it a very significant delivery, not to mention the fact that her seven-cylinder Sulzer propulsion engine gives freedom in operation and timing of exhaust valve actuation and fuel injection, being one of the first of the new RT-flex models without a camshaft. This 185.85m reefer, classed by ABS and whose hull form was tested at the Hamburg Ship Model Basin, has a length bp of 174.53m, a breadth of 25.14m, a depth of 16.40m, and a design draught of 8.50m. She can reach speeds of 21knots at 90% MCR and 20% sea margin. Carmel Ecofresh contains approximately 465,000ft 3 (13,168m 3 ) of reefer cargo space in 16 compartments under the superstructure (unusually positioned slightly forward of amidships), while 638TEU containers can be carried on deck using lashing bridges, and 244TEU in the five cellular holds (three forward and two aft). This is an rare design concept, with a double skin for water ballast tanks surrounding the container holds, and in way of the reefer hold, where the side spaces accommodate the cargo cooling ducts. Pallet elevators and a shell door for side loading are fitted at the starboard side of the refrigerated space. The cargo reefer system is designed for working in conditions varying from seawater temperatures between 0°C and 32°C, ambient temperatures of -20°C to +35°C and a ambient air relative humidity of 70%. Hold temperatures can be maintained between -30°C and +13°C. The refrigerating unit consists of an indirect cooling system, primary refrigerant of R407C, and secondary refrigerant (brine) of CaCl2. Electrical power for the refrigerating system and ship's services is provided by four alternators - 2 x 1210kVAand 2 x 1820kVA, driven by Caterpillar MaK 6M20 and 9M20 engines respectively The ship's main Sulzer engine, supplied by Wärtsilä, is a 7RT-flex60C model, which has an output of 16,520kW at 114rev/min. Steady running of this engine can be achieved at exceptionally low engine speeds - 10%-12% of nominal rotational speed is possible through the use of electronic controls. Another important feature of this unit is smoke-free operation throughout the load range, as discussed in our special article on the engines for the ships in November 2002. Carmel Ecofresh is fitted with a FP nickel- aluminium-bronze propeller, with a diameter of 6300mm; behind this is a Becker flapped rudder. Carmel Ecofresh has a double shell in the container cargo areas. She also has accommodation for a crew of 30 in 25 cabins. First Agrexco hybrid reefer ship nearing completion at ENVC A profile of the new hybrid reefer ship, Carmel Ecofresh and her sister, being built in Portugal by Estaleiros Navais de Viana do Castelo (ENVC) for operation by Agrexco, of Israel. TECHNICAL PARTICULARS CARMEL ECOFRESH Length, oa...................................185.85m Length, bp.................................. 174.53m Breadth, moulded......................... 25.14m Depth, moulded to main deck.......................... 16.40m to upper deck........................ 19.55m Width of double skin side.......................................... 2.28m bottom...................................... 1.50m Draught scantling...................................9.50m design...................................... 8.50m Gross.......................................... 17,929gt Displacement..................... 23,752tonnes Lightweight............................ 8700tonnes Deadweight, design.................15,052dwt Refrigerated cargo capacity ..... 465,000ft 3 or 13,168m 3 (4221 pallets) Bunkers heavy oil................................ 1560m 3 diesel oil.................................. 137m 3 Water ballast................................ 6033m 3 Heel control equipment........ air-activated tanks Main engine................Sulzer 7RT-flex60C Output................ 16,520kW at 114rev/min Service speed......................... 21.00knots Containers Lengths........................ 20ft; 40ft; 45ft Heights............................... 8.5ft; 9.6ft Total TEU capacity .................896TEU (20ft,40ft,45ft) On deck.............. approx 630TEU In holds............... approx 244TEU Reefer plugs.................................100 (+160 option) Tiers On deck..................................... 4 in holds...................................... 5 Classification..................................... ABS Cross-section through the refrigerated cargo compartments.
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Transcript of Hybrid Reefer
48 THE NAVAL ARCHITECT MAY 2003
APPROACHING completion at thePortuguese builder Estaleiros Navais de
Viana do Castelo (ENVC) is a highlyinteresting hybrid reefer ship, Carmel Ecofresh.This flexible vessel is for the transport of freshgoods - or cars as an alternative - in a large
refrigerated cargo hold amidships andcontainers fore and aft in conventional holds.The versatile design, understood to have beencarried out by the German consultant Schiffkoworking to a concept originally developed byInternational Maritime Advisers, ofCopenhagen, was discussed in detail in TheNaval Architect November 2001, page 6, andNovember 2002, page 33. Two 15,000dwtvessels have been ordered for the Germancompany Horizont Schiffahrtsgesellshaft, to beoperated by Agrexco, of Israel, and the first isexpected to be delivered in September this year.
A combination of cargo-carrying possibilitiesof this ship make it a very significant delivery,not to mention the fact that her seven-cylinderSulzer propulsion engine gives freedom inoperation and timing of exhaust valve actuationand fuel injection, being one of the first of thenew RT-flex models without a camshaft.
This 185.85m reefer, classed by ABS andwhose hull form was tested at the HamburgShip Model Basin, has a length bp of 174.53m,a breadth of 25.14m, a depth of 16.40m, and a
design draught of 8.50m. She can reach speedsof 21knots at 90% MCR and 20% sea margin.Carmel Ecofresh contains approximately465,000ft3 (13,168m3) of reefer cargo space in16 compartments under the superstructure(unusually positioned slightly forward ofamidships), while 638TEU containers can becarried on deck using lashing bridges, and244TEU in the five cellular holds (threeforward and two aft).
This is an rare design concept, with a doubleskin for water ballast tanks surrounding thecontainer holds, and in way of the reefer hold,where the side spaces accommodate the cargocooling ducts. Pallet elevators and a shell doorfor side loading are fitted at the starboard sideof the refrigerated space.
The cargo reefer system is designed forworking in conditions varying from seawatertemperatures between 0°C and 32°C, ambienttemperatures of -20°C to +35°C and a ambientair relative humidity of 70%. Holdtemperatures can be maintained between -30°Cand +13°C. The refrigerating unit consists ofan indirect cooling system, primary refrigerantof R407C, and secondary refrigerant (brine) ofCaCl2. Electrical power for the refrigeratingsystem and ship's services is provided by fouralternators - 2 x 1210kVA and 2 x 1820kVA,driven by Caterpillar MaK 6M20 and 9M20engines respectively
The ship's main Sulzer engine, supplied byWärtsilä, is a 7RT-flex60C model, which hasan output of 16,520kW at 114rev/min. Steadyrunning of this engine can be achieved atexceptionally low engine speeds - 10%-12%of nominal rotational speed is possiblethrough the use of electronic controls.Another important feature of this unit issmoke-free operation throughout the loadrange, as discussed in our special article onthe engines for the ships in November 2002.Carmel Ecofresh is fitted with a FP nickel-aluminium-bronze propeller, with a diameterof 6300mm; behind this is a Becker flappedrudder.
Carmel Ecofresh has a double shell in thecontainer cargo areas. She also hasaccommodation for a crew of 30 in 25 cabins.
First Agrexco hybrid reefer ship nearingcompletion at ENVC
A profile of the new hybrid reefer ship, Carmel Ecofresh and her sister, being built in Portugal by Estaleiros Navais de Viana do Castelo (ENVC) for operationby Agrexco, of Israel.
TECHNICAL PARTICULARSCARMEL ECOFRESH
Length, oa...................................185.85mLength, bp.................................. 174.53mBreadth, moulded.........................25.14mDepth, moulded
to main deck.......................... 16.40mto upper deck........................ 19.55m
Width of double skinside.......................................... 2.28mbottom...................................... 1.50m
Draughtscantling...................................9.50mdesign...................................... 8.50m
Gross.......................................... 17,929gtDisplacement..................... 23,752tonnesLightweight............................ 8700tonnesDeadweight, design.................15,052dwtRefrigerated cargo capacity.....465,000ft3
or 13,168m3 (4221 pallets)Bunkers
heavy oil................................ 1560m3
diesel oil.................................. 137m3
Water ballast................................ 6033m3
Heel control equipment........ air-activatedtanks
Main engine................Sulzer 7RT-flex60COutput................16,520kW at 114rev/minService speed.........................21.00knots Containers
Lengths........................ 20ft; 40ft; 45ftHeights...............................8.5ft; 9.6ftTotal TEU capacity.................896TEU
(20ft,40ft,45ft)On deck..............approx 630TEUIn holds...............approx 244TEU
Reefer plugs.................................100 (+160 option)
TiersOn deck..................................... 4 in holds...................................... 5
Classification..................................... ABS
Cross-section through the refrigerated cargocompartments.
p48+49.qxd 06/05/2003 16:18 Page 48
THE NAVAL ARCHITECT MAY 2003 49
General arrangement plans of the interesting and flexible 15,000dwt CarmelEcofresh, designed for the transport of fresh produce - or cars as a backhaulcargo - in a large refrigerated cargo space, with containers in fore-and-aftconventional cellular holds.
p48+49.qxd 06/05/2003 16:18 Page 49
