A NEW STEAM/DIESEL COMPARISON

The Authors, of the (U.S.) General Electric Company, recently concluded a comprehensive study of the fuel consumption rates of steam and Diesel propulsion systems. This article is a short report on the study (a copy of the complete analysis is obtainable from the company). Five propulsion systems were studied; they were one reheat and one non-reheat steam plant, and three low-speed Diesel plants. The plants, typical of those of container ships and large tankers, had an output of about 36,000 shp at 110 propeller rpm (some appropriate compensations were made), and an electrical load of 1,000 kW was assumed in each case. To provide an equitable assessment of the fuel consumption of the steam and Diesel plants, comparisons of plant performance were made on the basis of an "equivalent fuel rate". The conclusions indicate that the modern non-reheat steam plant and the modern low-speed Diesel have essentially the same performance if fuel and lubricating-oil costs only are considered; the modern reheat steam plant has the best performance. If a heavier and cheaper fuel (320 cSt instead of 180 cSt) is used in the Diesel plant, its performance is improved in relation to that of the steam plant, but the improvement is accompanied by increased maintenance and repair costs. Some further conclusions are drawn.

  • Availability:
  • Corporate Authors:

    Simmons-Boardman Publishing Corporation

    P.O. Box 530
    Bristol, CT  United States  06010
  • Authors:
    • Stott, C W
    • Casey, J P
  • Publication Date: 1979-8

Media Info

  • Pagination: p. 33-36
  • Serial:
    • Marine Engineering/Log
    • Volume: 84
    • Issue Number: 9
    • Publisher: New York: Simmons-Boardman Publishing Corp.
    • ISSN: 0732-5460

Subject/Index Terms

Filing Info

  • Accession Number: 00303311
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Feb 11 1980 12:00AM