Steam turbine

Twin cross-compounded steam turbines are used in the machinery

layout of the container ship, shown in Figure 1.4. Only part plans and

sections are given since there is a considerable degree of symmetry in the

layout. Each turbine set drives, through a double reduction gearbox with

separate thrust block, its own fixed-pitch propeller. The condensers are

located beneath each low-pressure turbine and are arranged for scoop

circulation at full power operation and axial pump circulation when

manoeuvring.

At the floorplate level around the main machinery are located various

main engine and ship's services pumps, an auxiliary oil-fired boiler and a

sewage plant. Three diesel alternators are located aft behind an acoustic

screen.

The 8.5m flat houses a turbo-alternator each side and also the

forced-draught fans for the main boilers. The main boiler feed pumps

and other feed system equipment are also located around this flat. The

two main boilers occupy the after end of this flat and are arranged for

roof firing. Two distillation plants are located forward and the domestic

water supply units are located aft.

The control room is located forward of the 12.3m flat and contains

the main and auxiliary machinery consoles. The main switchboard and

group starter boards are located forward of the console, which faces into

the machinery space.

On the 16.2 m flat is the combustion control equipment for each boiler

with a local display panel, although control is from the main control

room. The boiler fuel heating and pumping module is also located here.

The de-aerator is located high up in the casing and silencers for the

diesel alternators are in the funnel casing.