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Gas Turbine v. Diesel Debate Heats Up With Delivery of New Millennium Since Royal Caribbean decided to embrace the advanced marine propulsion technology inherent with gas turbines, power plants aboard cruise ships built and delivered in the new millennium could be much differ- ent. Even if all newbuilds do not incorporate gas tur- bine power, other propulsion suppliers such as diesel manufacturers will be driven by this new competitor in a previously diesel dominated domain — along by new and increasingly stringent environmental emission requirements — to continuously improve their designs in order to meet future needs. Owners and shipyards will be concentrating heavily on the following power plant issues when considering new ship designs: Space Utilization Royal Caribbean and Celebrity selected a COmbined Gas turbine and Steam turbine Electric drive System (COGES) for their new ships. This system, based on GE's LM2500+ aeroderivative gas turbine, was chosen because RCI was committed to using gas turbines for 100 percent of the ship's normal operational power requirements. The only diesel power aboard will be two small high-speed units to provide emergency standby and auxiliary power when the main gas turbine units are not in operation. The efficient space utilization of the COGES package added 50 passenger cabins as well as additional public space — an obvious valued- added design feature for RCI. In contrast, Holland America Cruise Line selected a COmbined Diesel And Gas (CODAG) turbine configuration for four new cruise ships. One LM2500 aeroderivative gas turbine-genera- tor set will be applied per ship, operating in par- allel with one or more of the diesel generators on board. This configuration will allow the vessels to operate in environmentally sensitive areas using clean gas turbine power. These two configurations illustrate the flexi- CRANKSHAFT GRINDING While Installed in Engine • CRANKPIN AND MAIN JOURNAL REFURBISHING While crankshaft is in engine • ALL TYPES OF 0N-B0ARD MACHINING Cylinder boring, engine top decks, horizontal joints, couplings, journals • LINE BORING OF MAIN BEARING POCKETS Laser and Optical Alignment • METALSTITCH® Repair of cracked or broken cast iron engine blocks IN-PLACE MACHINING COMPANY USA: International: FAX: 800-833-3575 414-562-2000 414-265-1000 24 HOUR EMERGENCY SERVICE...day or night, 365 days a year email: help@inplace.com Website: www.inplace.com Circle 294 on Reader Service Card bility of GE's LM fleet of aeroderivative gas turbines. Currently 27 navies use 968 engines on 388 ships. In the commercial marine arena, 82 GE LM gas turbines can be found on 45 ships, in various hull configura- tions, and in both mechanical and electric drive propul- sion systems. BIG GREEN 0ual engine room design shown above Technology in Console Lightweight, modular console systems replace the hard-wired embedded technology. These systems permit the console to be the last item placed in the control room and walked through a standard marine door frame. ACCU certified shown above. Data buss monitoring and control drastically reduces wiring to the EOS. Modular designs which are assembled in place. No single piece weighs more than 25 lbs. Easy disassembly for maintenance or upgrade. Fail-safe redundant CPU's and displays for each of 3 main sections. Software and hardware "mimics". ABS and USCG approved for all levels of manning ACC, ACCU, ABCU. Port, STBD, and auxiliary section from left to right. » Call today for more information! ELECTRONIC MARINE SYSTEMS, INC. 800 Ferndaie Place Rahway, NJ 07065 732.382.4344 732.388.5111 fax ijaol.com e-mail http://www.emsmarcon.com July, 2000 Circle 277 on Reader Service Card 29
