The VAP propulsion system is a complete steam turbine machinery concept including boiler, fluid bed superheater/reheater, main propulsion unit, feed water heaters, pumps and other auxiliaries. It has been designed by Stal-Laval to improve the competitive potential of steam propulsion. The design philosophy is described with its two main objectives which retain the traditional well known qualities of the steam turbine propulsion system: high availability, low maintenance cost and small installation volume with an improved and competitive fuel economy. The VAP system introduces a number of new technologies such as: 1) Fluid bed combustion; 2) Nickel-base alloys for super-heater and turbines; 3) High speed HP-and IP-turbines; 4) Compact planetary gears (CPG). In this paper only the main propulsion unit is described in detail. The paper ends with a discussion about the potential of the VAP concept for further development, and it is concluded that the new technologies introduced with the VAP system are used in a very cautious way with very high safety margins built into the system. This means that there will be room for considerable further progress when the first experience has been gained from the VAP system, which is defined as "a beginning of the road technology."

  • Availability:
  • Supplemental Notes:
    • From "Steam Propulsion for Ships in the Changing Economic Environment," a two day conference.
  • Corporate Authors:

    Institute of Marine Engineers

    Memorial Building, 76 Mark Lane
    London EC3R 7JN,   England 
  • Authors:
    • Norberg, L
  • Publication Date: 1978

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00310886
  • Record Type: Publication
  • Report/Paper Numbers: Series C, Paper SP14 Conf Pape
  • Files: TRIS
  • Created Date: May 7 1980 12:00AM