A coal-fired steam-turbine propulsion system offered by General electric Co., U.S.A., employs steam pressures ranging from 850-900 lb/in. square and temperatures from 454-510 deg C for an output of 20,000 shp. The plant will be automated for 16-hour unmanned operation, although a roving watchkeeping system may probably be preferred by many owners to keep an eye on the coal-firing system and on clinker formation on the firing grates or blockages in the coal-handling system. Otherwise operation of the plant with its conventional turbine installation should present few problems. The relatively simple turbine plant would have a fuel rate of 421.9 g/sph on normal stoker grade steam coal of around 5566 kcal/kg higher calorific value. Superheated steam is fed to HP turbine generator set, and feed pumps, while steam bled from the LP turbine is fed to first and second stage feed heaters. The final heater is supplied direct with low-pressure steam. The generator's maximum load is 600 kW which is said to be sufficient for all electrical requirements including that of the coal handling and firing systems. Design differences are all in the steam raising plant, consisting of coal bunkers disposed athwartships just forward of the boilers, a coal forwarding system, an automatic stoker, a steam generating system, unburnt carbon re-injection system, and an ash removal system. Order from BSRA as No. 54,578.

  • Publication Date: 1980-9

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Filing Info

  • Accession Number: 00329907
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: Mar 12 1981 12:00AM