Energy consumption for propulsion and other purposes aboard ship is discussed together with methods of reducing it. The relative amounts of energy required for propulsion, cargo-handling, etc. in a large Diesel-driven oil tanker are investigated. Most energy is expended in propulsion, and the amount needed to transport a unit volume of cargo a given distance falls steeply as ship size increases. Various practical considerations, however, are likely in future to operate against further increase in ship size. Reduction in specific fuel consumption of the power plant therefore assumes greater importance, although its effects are unlikely to be as dramatic as those of size increase. Efforts to reduce specific fuel consumption must consider future possible changes in environmental regulations. Other factors affecting the choice of prime mover are tabulated. Among possible methods of reducing the fuel consumption of Diesel and combined-cycle plants, superheating and waste- heat recovery are discussed. Methods of improving propulsive efficiency include ducted, contrarotating, and overlapping propellers and the use of waste LNG in dual-fuel Diesel engines and gas turbines is also mentioned.

  • Corporate Authors:

    Marine Engineering Society in Japan

    Osaka Building, 1-2-2 Uchisaiwai-Cho, Chiyoda-Ku
    Tokyo 100,   Japan 
  • Authors:
    • Akagi, S
  • Publication Date: 1976-6

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00149546
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Apr 13 1977 12:00AM