Abstract
This chapter focuses on various marine auxiliary machinery systems, equipment, and their services. It explains machinery such as air compressors, oil fuel transfer, centrifuges, and lubricating systems. Air at a pressure of 20 to 30 bars is required to start the main and auxiliary diesel engines in motor ships and for the auxiliary diesels of steamships. A starting air system for main diesels normally has two air compressors and two reservoirs with sufficient capacity for 12 main engine starts (six if a nonreversible engine). Receivers must store sufficient air for the starts without the need of top-up from compressors. Safety valves are normally fitted to air receivers, but in some installations, reservoirs are protected against overpressure by those of compressors. If safety valves are isolated from reservoirs, the latter must have fusible plugs fitted to release air in the event of fire. Reservoirs are designed, built, and tested under similar regulations to those of boilers. The low-pressure control air-system receiver is supplied ideally from a low-pressure and oil-free compressor. The supply may be obtained from the main air-start reservoirs through reducing valves or pressure regulators, driers, oil traps, and filter. In steamships, the starting air arrangements for diesel auxiliary engines are similar to those in motor ships. The low-pressure air for instrumentation and remote-control devices is likely to be supplied from a low-pressure and oil-free compressor.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.