PROPOSALS FOR A DIESEL-DRIVEN LNG CARRIER WITH RELIQUEFACTION PLANT

A special feature of LNG carriers is the existence of boil-off gas <BOG> from the cargo and, using this gas as fuel, they are normally propelled by steam turbines. In any study of the fuel economy of LNG carriers this feature should be given primary consideration since the value of LNG is rising along with the cost of oil fuels, whereas the thermal efficiency of conventional steam turbine plants remains low compared with other propulsion machinery. The paper presents a design study for an economical LNG carrier adopting more fuel- efficient systems such as diesel engines and reheat cycle steam turbine plant for propulsion. The main alternative considered is for a slow-speed diesel engine of Sulzer 7RTA84 type together with a Sulzer Zero-Loss reliquefaction plant for reliquefaction of the BOG. An economic analysis and comparison of operational costs with a COGAS system is made, based on a 125,000 m3 LNG carrier as specified for the Australian NWS project.

• Supplemental Notes:
  • Proceedings of Motor Ship Fifth International Marine Propulsion Conference, London, 3-4 Mar. 1983, p.119 (16 pp., 7 tab., 7 graphs, 8 diag.)
• Authors:
  • AKIBA, T
• Conference:
  • International Marine Propulsion Conference, 5th
  • Location: London , United Kingdom
  • Date: 1983-3-3 to 1983-3-4
• Publication Date: 1983

Language

• English

Subject/Index Terms

• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00685078
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM