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Abstract
Subsea compressor offers tremendous potentials, but also some obstacles. Using magnetic bearings can eliminate lubrication oil system as well as seal system. High-speed permanent-magnet electrical-motor direct-drive technology allows centrifugal compressor to meet optimum speed, eliminating gear box. This design offers inherent machinery health monitoring features and very compact and reliable train. New technology of hermetically sealed direct drive centrifugal compressor for offshore and subsea applications are reviewed and discussed. Latest technologies and modern achievements on direct drive compressor designs, magnetic bearings, permanent magnet motors, cooling systems and train arrangements are reviewed. Case studies for horizontal and vertical compressor trains are presented.
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Notes on contributors
Amin Almasi
Amin Almasi is a rotating machine consultant in Brisbane, Australia. He is a chartered professional engineer of Engineers Australia (MIEAust CPEng – Mechanical) and IMechE (CEng MIMechE) in addition to a M.Sc. and B.Sc. in mechanical engineering and RPEQ (Registered Professional Engineer in Queensland). He specialises in rotating machines including centrifugal, screw and reciprocating compressors, gas turbines, steam turbines, engines, pumps, subsea, offshore rotating machines, LNG units, condition monitoring and reliability. Mr Almasi is an active member of Engineers Australia, IMechE, ASME, CMVI, Vibration Institute, SPE, IEEE, and IDGTE. He has authored more than 60 papers and articles dealing with rotating equipment, condition monitoring, offshore, subsea and reliability.