Page 52: of Maritime Reporter Magazine (July 1995)

New Engine Targets Bulk Carriers And Tankers

At the recent Nor-Shipping show in Oslo New Sulzer Diesel Ltd. in- troduced two new engine types to the Sulzer RTA series of low-speed marine diesel engines. The Sulzer

RTA48T and RTA58T engines are specifically designed for the pro- pulsion of bulk carriers and tank- ers. With cylinder bores of 480mm and 580mm, these engines have maximum continuous outputs of 1,850 and 2,720 bhp/cylinder (1,360 and 2,000 kW/cylinder) at 124 and 103 rpm respectively. Thus, in models with five to eight cylinders, they together cover an overall power range of 5,600 to 21,760 bhp (4,100 to 16,000 kW).

The engines were designed and delivered with vessels between the size of25,000 to 85,000 dwt in mind.

Ul TEjk

NEVER CHANGE A WINNING TEAM

THE TEAM IS THE SAME - WE HAVE ONLY CHANGED THE NAME

ULSTEIN BERGEN has developed and manufactured main engines and generating engines for ships, as well as diesel- and lean-burn gas engines for land installations since 1943. Quality in all details has always characterized

ULSTEIN BERGEN products, and our workforce continues to take pride in the high level of its craftsman- ship. The team is the same, we have only changed the name.

ULSTEIN BERGEN is still recognized worldwide as a manufacturer of economical, reliable medium-speed diesel engines for propulsion and generating power plants.

ULSTEIN BERGEN AS has been found to conform to Quality

System standard: BS5750: PART 1,

ISO 9001, EN29001: 1987.

ULSTEIN BERGEN AS

P.O. Box 924, N-5002 Bergen, Norway.

Tel.: +47-55 19 90 00. Telefax: +47-55 19 04 05.

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Tel: 1-504-464-4561 • Fax: 1-504-464-4565

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The engine ratings are wi the scope of experience, with bi mean effective pressures (BME1 about 18.2 bar, while the mean ton speed is 8.3 m/s. In effect, piston strokes were selected to tain, with this piston speed, app priate propeller shaft speeds for 1 envisaged ship types.

The cylinder bores were, in tui determined by the power outpu required by ships of this type ai size. Much attention was paid size and weight, and the new di signs are notable for their compai dimensions. The compact dimer. sions will give ship designers mor freedom in creating short engint rooms. This will be aided by tht provision for a degree of flexibility in the fore and aft location of the turbocharger and scavenge air cooler module for best engine room ar- rangements. Much thought was given to extending the time between overhauls, and ease of operation and maintenance. The design ob- jective is a time between overhauls of the principal components of 15,000 hours.

Both engines will be able to meet the IMO limits for NOx exhaust emissions that come into effect in 1997 without any additional equip- ment. The NOx levels are reduced simply by adapting the engine tun- ing. This is facilitated by the elec- tronic variable injection timing sys- tem now standard on Sulzer RTA- series engines.

For more information from

New Sulzer Diesel

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Principal Engine Data

Engine type RTA48T RTA58T

Bore (mm) 480 580

Stroke (mm) 2,000 2,416

Power, MCR (bhp/cyl) 1,850 2,720 (kW/cyl) 1,360 2,000

Speed range (rpm) 99-124 82-103 # of cylinders 5-8 5-8

Power range bhp 5,600-14,800 8,150-21,760 kW 4,100-10,880 6,000-16,000 54 Circle 300 on Reader Service Card Maritime Reporter/Engineering News