The paper examines the operating data recorded during the initial years of service of the first three super-large-bore engines built by the authors' company. Data per each of the main components of the engines is given and considered and troubles that have occurred are discussed together with their remedies. For the first ship the records refer also to the annual inspection carried out at the end of the second year of operation. The trend, towards tankers of ever increasing size led to the demand for propelling sets of higher and higher unit output. After a first period in which steam propulsion plants were adopted, the availability on the market of super-large-bore diesel engines led ship builders and ship owners to look to diesel engines also for these large vessels. In the authors' country the co-operation between ship builders and engineering industries permitted the study and the realization of a standard type of tanker, 253000 tdw, diesel engined, whose prototype started operation in mid 1972. Two sister ships have subsequently entered service and ten others are scheduled for delivery. These vessels are powered by a single two-stroke main engine, built by the authors' company, type A 1060.10, 10 cylinders in line, bore 1060 mm, stroke 1900 mm, 40000 BHF at 106 rpm, supercharged; by two high speed four-stroke auxiliary engines, type A 210.16, 16 cylinders in Vee, bore 210 mm, 12OO/1500 rpm, which can each drive either one of the 3500 m3/hr cargo pumps or one 1200 kW generator, and by one emergency unit, type A 210.4, having the same characteristics as the auxiliary engines and driving a 300 kW generator. Further, two water-tube boilers of 40 tons/hr at 30 at produce steam for driving a 1800 kW turbo-alternator and two turbo-driven cargo pumps. Under normal sea-going conditions an exhaust gas boiler can supply all the steam required for the operation of the main turboalternator as well as for the other usual services. The two main boilers are therefore utilized only intermittently, when the engine is stopped, or when it is necessary to heat the cargo or for tank cleaning.
Operating results of the first three GMT engines A 1060.10 fitted on tankers of 253000 TDW
Betriebsergebnisse mit den ersten drei GMT-Motoren Typ A1060.10 in Tankschiffen
1975
29 Seiten, 20 Bilder
Aufsatz (Konferenz)
Datenträger
Englisch
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