Marine Variable Frequency Propulsion Drives

[argentox]

Has anyone studied the efficiency differences between the marine propulsion drives systems available?
I understand and suspect that the now legacy CEGELEC (Alstom) variable frequency drives are the most efficient marine propulsion drives across all speeds. Nevertheless, I like to see a study or some research data on the matter.
Thank you.

http://www.ericwschreiber.com

http://www.linkedin.com/in/eschreiber

 

[7anoter4]

When I was very young and I navigated once through Danube toward the Black Sea I saw still steam propulsion ships based on heavy oil besides Diesel propulsion and new [and seldom seen ] was also water jet propulsion for rapid jetboats.
I think on Mississippi River one could see coal firing steam boats up today.
The steam engine efficiency was about 20%.Was very cheap and very polluting mean. And jet also 20-25% and more expensive fuel.
If you intend to search Diesel-Electric efficiency vs. Diesel efficiency see the following link.

http://www.ossapowerlite.com/tech_library/fuel_efficiency/fuel_efficiency.htm

If you intend to search how to improve the efficiency introducing VFD in ship propulsion see the following:

http://www.amsc.com/products/motorsgenerators/documents/VSDforShipsPaper.pdf

http://www.maintenanceresources.com/referencelibrary/acdrives/vfd.htm

 

[argentox]

Thank you for the useful links. They are in deed very helpful.

http://www.ericwschreiber.com

http://www.linkedin.com/in/eschreiber