Electric propulsion for LNG Carriers. A technical tour of three electrical technologies available today (eBook)

Published Date

January 2006

Electric propulsion for LNG Carriers. A technical tour of three electrical technologies available today (eBook)

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This paper discusses the technical and economical advantages of the different types of electronic propulsion systems (15pp)

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Electric propulsion systems are now the preferred solution of the main LNG players as they bring some significant advantages compare to steam propulsion.

If there is no doubt about the benefit of such propulsion, it could be sometimes difficult to have a clear overview of the different electrical technologies available today to be fitted on board a vessel:

Three main technologies are :
1) The well known one, as it comes from the 20 years background in cruise and merchant business : The Load Commutated Inverter (LCI) associated to Synchronous motor solution
2) A technically more sophisticated one as it uses new converter type for the Marine business, still feeding synchronous electric motors : The Pulse Width Modulation (PWM) converter associated to Synchronous motor solution
3) A more advanced one, as it combines the advantage of PWM converter and the performance and reliability of the induction motor: The PWM converter associated to Induction motor solution

The aim of this paper is to discuss the technical and economical advantages of these solutions by offering a special focus on the three following drivers :
- The Propulsion Engineer point of view : Impact on power plant, power factor, harmonics, efficiency, propulsion control,
- The Ship Yard point of view : Integration data required by naval architects as foot print, volume, weight, installation cost,
- The Ship Owner point of view : operational performance, through life cost, maintainability, reliability, availability,

Paper Delivered by:
Pascal Manuelle (Converteam SAS)
Jean-Charles Mercier (Converteam Moteurs)
Abdellatif Belkentaoui (Converteam SAS)

Prepared for:
Gastech Abu Dhabi 2006

For over 45 years, the Gastech Exhibition & Conference has been at the forefront of the international gas and LNG market. This world-renowned event is regarded as the most significant meeting place for gas and LNG professionals, where the global industry gathers to do business.

Gastech hosts major IOCs, NOC’s, global utility companies, EPC contractors, shipbuilders, pipeline companies, manufacturers, distributors, technology and service providers, all who play an active role in the global energy value chain.

Title: Electric propulsion for LNG Carriers. A technical tour of three electrical technologies available today (eBook)
Product Code: 4433G120
Published Date: January 2006

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