Chapter 25. -NEW DEVELOPMENTS IN NAVAL ENGINEERING 



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Figure 25-13.— Engine Room Console. 



be easily removed from the panels by unplugging. 

 Temperatures, pressures, and liquid levels are 

 converted to electrical signals by sensors lo- 

 cated at various points throughout the system. 



Significant readings on the console are 

 displayed on flush mounted electric meters. 

 Other readings which only need to be checked 

 periodically are read on digital meters (called 

 digital demand display readouts). The console 

 provides monitoring of the boilers and monitor- 

 ing and control of the main propulsion plant, tur- 

 bogenerator sets, main condensate pumps, lube 

 oil pumps, fire pumps, and other auxiliary ma- 

 chinery, thus, enabling the engine room operator 

 to observe all important operating functions 

 without leaving his station. At any time a plant 

 status record may be made with the data logger. 



The COS continually monitors key tempera- 

 tures, pressures, levels and motor conditions. 

 If any go beyond operating limits, the system 

 sounds an alarm to alert the operator and the 

 alarm logger automatically records the out of 

 limit conditions. An alarm log review, plant 

 status log and bell log printout may be obtained 

 at any time by pressing a push button. Selected 

 points also have individual alarm lights. A bell 

 logger automatically records engine order tele- 

 graph signals and responses, propellor r.p.m., 

 throttle control location, and throttle control 

 wheel position together with time and date. 



Generator Section 



The generator section of the engine room 

 console (fig. 25-14) provides control and mon- 

 itoring of the ship service generators. Provi- 

 sions are included which enable the operator to 

 adjust the frequency and voltage and monitor the 

 output of each generator; monitor the current in 

 the shore power connection; open, close, or mon- 

 itor the position of generator or bus tie circuit 

 breakers and the shore power circuit breaker; 

 test each switch-board busfor grounds, and con- 

 trol and monitor the space heaters in each gen- 

 erator. 



Propulsion Section 



The propulsion section of the engine room 

 console (fig. 25-15) contains the throttle controls 

 and transfer switches, engine order telegraph, 

 shaft revolution indicator- transmitter, and the 

 necessary gages and indicators for monitoring 

 the operating conditions of the main turbines, re- 

 duction gears, and propeller shaft. 



The throttle control handwheel controls the 

 position of pilotvalves on hydraulic power actua- 

 tors. The hydraulic power actuators, in turn, 

 open or close the main steam valves to the ahead 

 and astern turbines, thus, controlling the speed 

 and direction of the propellor shaft. An alternate 

 electrical control and a direct mechanical con- 

 trol of the throttle are also provided. Throttle 



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