TAILIEUCHUNG - Lesson 17-Ship Systems (2)

Tham khảo tài liệu 'lesson 17-ship systems (2)', ngoại ngữ, anh văn thương mại phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Lesson 17-Ship Systems 2 The rest of the ship systems are ballast system water supply system steam aux. boiler system ventilation air conditioning system refrigerating plant and fresh water production plant. 1. The Ballast System On the condition of light ship the stability and propeller propulsion efficiency of a vessel will be affected if its draft is too shallow. In addition uneven loading of cargoes and the consumption of oil water and provisions will all bring about draft variation as well as trim and heel. To make improvement upon the ship performance the ballast system is to be employed which is capable of the adjustment of draft trim and heel by regulating the water volume in individual ballast tanks. Ballast tanks can take in or discharge sea water with the assistance of a ballast pump through the ballast piping and the sea water among various ballast tanks can also be transferred from one tank to another. 2. The Water Supply System The water supply system onboard is more complex than that in a town for it concerns sea water and fresh water as well as potable water and sanitary water. As usual its branch systems will contain A The potable water system that serves the drinking water. B The F. W. system that is for lavatories and engine room equipment. C The sanitary water system that is used to flush cabins and toilets. 3. The Steam Aux. Boiler System The task of this system is to provide heat energy for heating hot water and galley as well as for the heating of fuel oil lube oil and cargo oil. 4. The Ventilation Air Conditioning System The forced ventilation pattern is widely used onboard to pump in fresh air and draw out stuffy air with the aid of a ventilator. Owing to the limited effect of ventilators however a brandnew system called air conditioning has been developed the method of which is to pretreat the ambient air turn it into the clean air with moderate temperature and relative humidity and then transfer the agreeable air into individual cabins so

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