CUVX Design Report - the AOE home page - Virginia Tech

CUVX Design – VT Team 2 Page 77accessibility and 4 meters from the forward transverse bulkhead. In MMR1 there is 1 power generation module(PGM) including diesel engine, generator, generator lube system, engine fuel system, start air system, firesuppression system, bus switchgear, sub base, seawater cooling system, engine lube system, and 1 auxiliary diesel.These are arranged to balance the ship, longitudinally and transversely. The day tanks and settling tanks arearranged along the bulkhead in the lowest level. The sewage treatment machinery and JP-5 system are placed inseparate rooms within the main machinery rooms on the lowest level for safety and sanitation. Next the pumps andladders are arranged on the lowest level in the remaining space with necessary room around each for producibilityand maintenance. The seawater strainers are placed on the lowest flat in between the engines. Most of the largeauxiliary machinery is placed on the 1 st platform. This includes air conditioning plants, refrigeration plants,distillers, brominators, and their associated equipment. These are arranged around the opening for the engines andladders along with an engineer’s operating station and purifier equipment. The purifier equipment is also placedinside a separate room for safety. Sensitive equipment such as switchboards and power conversion modules arelocated on the 2 nd platform away from the bilge. Also on the 2 nd platform are machinery room ventilation fans.MMR2 and MMR3 are arranged in a similar manner. (Auxiliary engines and generators are located on the 1 stplatform of MMR1 and the auxiliary machinery room.)Figure 70 shows the general machinery arrangements in the propulsion motor rooms (PMR1 and PMR2).Drawing D2 shows a complete profile and plan view of PM1 and PM2. The PMRs are separated by a centerlinebulkhead for survivability in the case that one side takes a hit or floods (with care taken to check for the effect ofoff-center flooding). The motors are arranged as close to the forward bulkhead as clearance restrictions allow. Thiskeeps the shaft angle less than 2 degrees. The propulsion power converters are arranged close to the motors. Eachconsists of 3 parallel units, one for each propulsion power bus. The motor control and exciter units are placed nearthe motors and support equipment is arranged in the remaining space.No. Equipment Capacity13 Local Control Panel23 Fire Pump 2000 gpm@ 9 bar35 Power Converter 3 x 5000 kW52 Propulsion Motor 14000 kW@ 117 rpm53 Motor Control54 Motor Exciter67 Propulsion (Line) Shaft 520 mm diameter70 Line Shaft Bearing74 Strut and Stern Tube 1.1 m 3 /hr @ 2 barLube Oil Pump75 Lube Oil Cooler 1.1 m 3 /hr76 Lube Oil Filter 1.1 m 3 /hrFigure 70. Propulsion Motor Room Machinery Arrangements4.9.3 Internal ArrangementsSix space classifications are considered in the internal arrangements: hangar space, machinery rooms, weaponsmagazines, human support, ship support, and mission support. Area and volume estimates for these spaces wereinitially taken from the ship synthesis model and refined in the process of arranging the ship. The arrangements areshown in drawings D3, D4, D5.Hangar decks require the largest area in the ship. The upper three decks of the ship are used primarily foraircraft operations. These decks are located to most easily service, recover and launch aircraft. Hangar deck areasare used to service, store, and prepare aircraft for missions. Hangar decks are interconnected by three aircraftelevators and four weapons elevators. Multiple elevators are used to provide redundancy.