ADVANTAGES TO BE GAINED FROM INSTALLING MEDIUM-SPEED ENGINES FOR THE PROPULSION OF LARGE CONTAINER-SHIPS
The Author describes a study, undertaken by the Spanish shipbuilders A.E.S.A., for the design of a container ship capable of carrying 1,100 40-ft units (it is mentioned that there is a trend towards the elimination of 20-ft containers, and that during the transition period the 20-ft containers would be connected together in twos to form units 40 ft long for handling and stowing). To be profitable, such a ship would have to have a service speed, even in "energy crisis" conditions, of 24 to 25 knots. If the ship had single-screw steam-turbine propulsion, about 45,000 shp would be required for this service speed, whereas with a twin-screw medium-speed Diesel installation it would require only 37,800 bhp (at 80 rpm); in the latter case, length bp would be 229 m, as against 239 m for the steam-turbine ship. These two possible designs are compared with particular reference to initial and operating costs and to the effect of the power plant upon the hull design. The design of the motor ship is described and discussed in some detail, and general-arrangement and other drawings and engine-room plans are included; the proposed engines are two AESA-Pielstick 14PC4V units, each developing a maximum of 21,000 bhp at 400 rpm. The article is presented under the main headings: 1. Design of the Ship (Main dimensions--Form--Structure--Engineroom layout--General layout). 2. Economic Study (Difference in initial investment costs--Difference in consumptions--Difference in maintenance). It is concluded inter alia that, for round voyages of 12,000 miles, the savings in transportation costs per container could be about 16.6% in favour of the motor ship. Order from: BSRA as No. 49,046.
Asociacion de Ingenieros NavalesApdo Correos 457
- Rubio, JLM
- Publication Date: 1978-3
- Pagination: 10 p.
- INGENIERIA NAVAL
- Volume: 46
- TRT Terms: Containerships; Costs; Design; Diesel engines; Economic analysis; Electric power plants; Layout; Machinery; Propulsion; Structural design
- Old TRIS Terms: Diesel design; Diesel propulsion costs; Machinery layout; Medium speed diesels; Power plant costs; Power plant design
- Subject Areas: Design; Economics; Finance; Marine Transportation; Vehicles and Equipment;
- Accession Number: 00182490
- Record Type: Publication
- Source Agency: British Ship Research Association
- Files: TRIS
- Created Date: Oct 12 1978 12:00AM