MacGregor equpment packages for NCL newbuilds
Norwegian Cruise Line's two new 93,000 gt "freestyle" cruise ships will feature MacGregor equipment packages comprising refrigeration machinery, provisions stores and elevators
At the beginning of the year NCL contracted MacGregor to design and supply equipment packages including elevators, refrigeration machinery and provisions stores for the two ships. They are on on order at Meyer Werft. These ships will be largely based on the design of their near-sisterships Norwegian Dawn and Norwegian Star, for which MacGregor also supplied elevators.
Hull 667 is already under constructionand will be delivered in 2005. Hull 668 will follow in 2006. They will be capable of 24 to 25 knots and are designed to accommodate 2,400 lower berths.
MacGregor is responsible for designing and supplying the refrigeration plant on board. This will cool the provisions stores, catering equipment (counters and refrigerators) and some fan coil units in technical spaces.
Two separate systems are used, one for frozen spaces and the other for chilled. Two 56 kW (-34°/+34°C) negative direct expansion units, one as stand-by, are dedicated to the freezer rooms. Two 535 kW (-16°/+43°C) brine chillers, one as stand-by, are dedicated to cooling the extensive -10°C propylene glycol network connected to the chilled rooms, various refrigerated galley equipment and technical spaces.
All units use open screw compressors. The condensers are cooled by fresh and sea water.
MacGregor is also designing and supplying all secondary equipment such as pumps, tanks, valves and instrumentation for the glycol network and the refrigerant recovery unit.
The plant fulfils the present requirements of DNV's "clean" classification notation and US public health (USPH) authorities and uses the HFC refrigerant R507.
52 provisions stores
The refrigeration machinery will cool all 52 provisions stores on each ship, to be designed, supplied and installed by MacGregor. Most of these stores (33 of them) are situated on lower decks 3 and 4, and the rest are situated near the service or preparation areas on decks 5, 6, 7, 9 and 12. The total area occupied by provisions stores is about 1,100m2.
USPHS-type air coolers will cool the air inside the provision stores: 45 cubic air coolers guarantee the air distribution in most of rooms, but in smaller spaces and walk-ins, 15 space-saving flat coolers have been specified.
MacGregor will supply 48 of its A-60 fire doors per ship to ensure the safety of the stores. The Passenger Ship division will also fit a refrigerant leak detection system that provides remote warning of leaks in the machinery space and inside each freezer room. The monitoring and alarm systems for the control of the provisions stores and the cooling plant installation will interface with the main ship automation system via a 'communication concentrator'.
MacGregor will supply and install 12 passenger elevators, 10 service elevators and two "dumb waiters." All elevators are KONE MiniSpace* units.
The MiniSpace employs the super-compact gearless EcoDisc* hoisting drive to provide an elevator concept that occupies less space and weighs less than conventional traction elevators, offering benefits to both shipowner and shipyard. Space savings inside the machinery rooms of up to 50 per cent are made using this system, and weight savings of 10 percent. In addition EcoDisc has only one moving part and is roughly twice as efficient, using 60 per cent less energy.
The strategically-grouped passenger elevators can carry 20 people and have a maximum capacity of 1,500kg. Eight service elevators have a capacity of 13 persons/1,000kg and two service elevators have a capacity of 20 persons/2,000kg. Dumb waiter capacity is 150kg. The travelling speed of all elevators is 1m/s, and installation will start at the beginning of April this year.
*MiniSpace and EcoDisc are both trademarks of KONE Corporation, and are being used by the MacGregor Group under license from KONE.