STAL-LAVAL is developing a new steam turbine plant, VAP (Very Advanced Propulsion) with the following major goals in mind: Low operating costs -- including low installation cost and minimum influence on the costs of the ship. The configuration of the VAP turbines and gears is quite different from that of a conventional reheat plant, since the use of three separate turbines allows each to operate at its optimum speed, while their small dimensions, symmetrical design and lack of material concentrations reduce the thermal distortion and the relative movement between the rotor and stationary parts, all leading to increased HP and IP turbine efficiencies while still maintaining proven design criteria regarding tip speeds and stresses. STAL-LAVAL and Babcock & Wilcox (Operations) Ltd recently entered into an agreement concerning the development of oil-fired fluidized beds for the VAP turbine plant. For a 180,000 tdw bulk-carrier with about 20 MW installed machinery VAP turns out to be superior to diesel installations. In terms of Required Freight Rate (RFR) the margin below the slow-speed diesel is some four percent over 20 years of operation. Applied to a 30,000 tdw products-carrier the studies indicate that the VAP will give superior or comparable economic results to that of slow-speed or medium-speed engines. Even for container ships, where the differences in propeller speeds are marginal, the VAP plant seems to offer superior economy for powers above 10 MW, i.e., 12,000-15,000 tdw capacity.

  • Corporate Authors:

    Whitehall Technical Press Limited

    29 Palace Street, Westminster
    London SW1,   England 
  • Publication Date: 1978-1

Media Info

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Filing Info

  • Accession Number: 00179442
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Aug 27 1978 12:00AM