In this article, Gran di Motori Trieste assesses the viability of replacing steam turbines in existing ships with Diesel engines. In the 10-year period since 1967 fuel oil costs have increased 5 times, crew costs 3 times, maintenance costs 2.4 times, and other running costs 1.8 times. Steam to Diesel conversions are more profitable than ever today since the higher average speed of ships requires greater propulsion power, thus increasing the influence of fuel oil on the total transport cost. The Diesel engine is a most efficient machine. Its consumption rate does not change with reduction of output, so that it offers the maximum advantages both in normal operating conditions and when the ship's main speed is lower than the rated speed. A situation quite common in the present tight charter-rate conditions. It is also pointed out that the selling price of second-hand turbine tankers above 75,000 dwt at seven years old is an average of $40/dwt, while motor tankers realise $70/dwt. The commercial life of motor tankers is some five years longer than that of turbine tankers. Order from BSRA as No. 49,655.

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  • Corporate Authors:

    IPC Industrial Press Limited

    Dorset House, Stamford Street
    London SE1 9LU,   England 
  • Publication Date: 1978-6

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Filing Info

  • Accession Number: 00195389
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Jul 31 1979 12:00AM