The size and evaporation rate of marine boilers manufactured between 1960 and 1974 steadily increased to such an extent that, for a 300,00-dwt tanker, the evaporation rate was in the order of 105,000 kg/h for a single-boiler installation operating at 32,000 shp. The present trend towards smaller ships, with consequent reductions in horsepower, has led to evaporation rates in the range of 17,500 kg/h to 33,000 kg/h for a 10,000 shp and a 20,000 shp twin-boiler installation respectively. Some of the design and operating features of the larger boilers, i.e. welded-wall construction, single casing and tangential firing, can be retained for the smaller boilers. This paper discusses the design and operating features of the smaller boilers including reheat designed for low horsepowers and partial load performance of both reheat and non-reheat designs. Stack Gas analysis and fuel analysis have been included to show present day fuel trends and partial load stack conditions. Order from BSRA as No. 51,969.

  • Supplemental Notes:
    • Proceedings of Conference "Steam Propulsion for Ships in the Changing Economic Environment", London, 18-19 January 1978.
  • Corporate Authors:

    Institute of Marine Engineers

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

Media Info

  • Features: References;
  • Pagination: 11 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00303903
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Report/Paper Numbers: Paper No. 6 Conf Paper
  • Files: TRIS
  • Created Date: Feb 27 1980 12:00AM