The world energy situation and a four-fold increase in the price of fuel oil since 1973 have necessitated a drastic reappraisal of ship management costs with emphasis on improving machinery performance and consequently fuel consumption. The theme of this paper is that increased efficiency must not be achieved at the expense of decreased reliability and ways are considered whereby the equation may be kept in balance. Three 33-MW (45,000-shp) steam turbine designs, two non-reheat and one reheat unit, with their respective feed cycles are analysed. The datum unit, design "A", is compared in performance with designs "B" and "C". In the case of design "B" only component improvements are made, Design "C" highlights the fundamental improvement in cycle performance given by the introduction of reheat. Design considerations covering the selection of last row ahead blades, vortex blading, tip sealing, and condenser optimisation are discussed and commented upon. New developments in turbovisory equipment and its practical application are described. It is concluded that worthwhile gains in efficiency are available without prejudice to plant reliability or availability. Order from: BSRA as No. 47,174.

  • Corporate Authors:

    Institute of Marine Engineers

    Memorial Building, 76 Mark Lane
    London EC3R 7JN,   England 
  • Authors:
    • Burn, R E
  • Publication Date: 1976

Media Info

  • Features: References;
  • Pagination: 9 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00168341
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Report/Paper Numbers: Part 2 Proceeding
  • Files: TRIS
  • Created Date: Feb 16 1978 12:00AM