Propeller Retrofits Saves 10 Percent Fuel

Wednesday, January 05, 2000
Benefits of fitting CLT propellers include fuel savings of around 10 percent while maintaining the same speed, according to Geneva-based shipowner Cargill International SA, which has recently released consumption figures for two of its Panamax bulk carriers. The 70,000 dwt Powhatan and Paiute had CLT propellers retrofitted in February and March 1998, after Cargill had already benefited from more than two years' first-hand experience of the CLT propeller concept developed by Madrid-based designer Sistemar. Cargill first fitted a CLT propeller to one of its vessels in 1995, the 13,600 dwt orange juice carrier Bebedouro, and subsequently to two Capesize bulk carriers, the 164,000 dwt Cherokee and Comanche, as well as Powhatan and Paiute. "The payback period for the CLT propeller investment for the five ships has been approximately two years per installation," says Hans-J Hollstein, technical manager of Cargill International's Ocean Transportation Division. Powhatan and Paiute are being offered on the time-charter market with daily fuel consumptions of 27.5 tons for a speed of 15 knots in ballast, and 28 tons for a 14-knot service speed when fully loaded. These figures represent 8.3 percent and 10.25 percent improvements respectively over characteristics offered for their sister ships Peoria and Pequot, which are fitted with conventional propellers (30.0 tons/day in ballast; 31.2 tons loaded, at the same speeds). Mr. Hollstein adds that, as well as the direct fuel cost benefits, the vessels with the lower fuel consumption because of their CLT propellers are much more attractive on the market, especially when freight rates are low. For the Capesize bulkers Cherokee and Comanche, Cargill says that as a result of fitting the CLT propellers the daily fuel consumption has been reduced from 58.5 tons/day to 52.5 tons fully laden, and from 54.4 tons/day to 49.5 tons in ballast. The main reason for Bebedouro's retrofit was to reduce propeller-excited vibration levels, with fuel saving being an additional benefit. Since then Cargill has experienced a nine percent improvement in fuel consumption.
Maritime Reporter June 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Marine Propulsion

HMS Queen Elizabeth Powers to Life

U.K. Royal Navy aircraft carrier HMS Queen Elizabeth has produced power from her onboard diesel generators (DGs) for the first time, marking a significant stage in the program.

Tuco Reveals New Naval Interceptor Vessel Design

Following last week’s Seawork exhibition on workboats and small military and security vessels, Tuco Marine of Denmark reveals its newest vessel in the ProZero line.

Conference to Delve into Hybrid Power & Propulsion

The first international Hybrid Marine Power & Propulsion Conference will be held at the RNLI Lifeboat College, Poole UK from October 6-8, 2015.   Shock Mitigation

 
 
Maritime Contracts Maritime Security Naval Architecture Offshore Oil Pod Propulsion Port Authority Ship Electronics Ship Repair Shipbuilding / Vessel Construction Sonar
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1495 sec (7 req/sec)