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MARINE PROPULSION TECHNOLOGY Test Results: MAN B&W L 16/24 Next in series — for main propulsion, electrical generation — set for testing MAN B&W Diesel's L 16/24 was launched to fill the need of auxiliary diesel engines in the 100 to 340 kW per cylinder output range. The engine was designed to provide ease of mainte- nance, compliance with current and future environmental demands in regards to emission levels, and provide unrestricted heavy fuel oil suitability. The first engine of the series was started in 1994 — an engine with a 160 mm bore and a 240 mm stroke — and was designed for operation at 1,200 rpm. One key to the diesel engine's accep- tance and incorporation by the worldwide maritime market is its design for the combustion of the poorest quality fuel. The manufacturer also says that it is the smallest genuine heavy-fuel oil diesel engine on the market. Essential to the engine's success is a high-efficiency turbocharger, which deliv- ers more air and thus keeps tempera- tures within feasible limits. Tests at the company's Augsburg facility reportedly The 5L 16/24 test engine cylinder head, after 1,000 hours of endurance testing fueled by HF0 700 cSt. BRUNVOLL THRUSTER SYSTEMS THRUSTERS FOR MANOUEVRING AND PROPULSION OF SHIPS confirmed the manufacturer's design parame- ters. Two five-cylinder engines were installed on the test bed, one for extended endurance runs and the other for measurements of all relevant data. Both engines were operated only on heavy fuel oil of 700 cSt. The new test beds in Augsburg allow on-line measurement of all data. The temperature at the cylinder liner in the area of top dead center (TDC) of the first piston ring has been set at 170 degrees C by optimiz- ing cooling. This is to ensure that corrosion is avoided in the cases of fuels containing sulfur. Endurance test runs more than 1,000 hours were conducted at various load conditions. MAN B&W reports that it was possible to achieve very good results both during the course of the low-load tests and during the course of the alternative loading. The newly developed MAN B&W turbocharger (NR 14/S) — developed specifically for auxil- iary engine operation — achieved particularly good results, with copious air supply thanks to its high efficiency. Five-cylinder engines are equipped with a smaller turbocharger (NR 12/S) as a standard feature. 3000 THRUSTERS delivered and more than 1700 Ships equipped with BRUNVOLL THRUSTERS BRUNVOLL ARE PRODUCERS OF Tunnel Thrusters Azimuth Thrusters Control Systems Low noise Thrusters BRUNVOLL BRUNVOLL A.S. 6401 MOLDE NORWAY TELEPHONE + 47 71 21 96 00 FAX + 47 71 21 96 90 REPRESENTATIVE IN USA: SMI SHIPS MACHINERY INTERNATIONAL, INC. HEAVY DUTY MARINE EQUIPMENT 8375 N.W. 68 STREET, MIAMI, FL.33166 TELEPHONE (305) 592-7350, FAX (305) 591-8223 60 Circle 366 on Reader Service Card Test Results The specific fuel oil consump- tion at full load is 193 g/kWh, including the oil and cooling water pumps integrated in the flange- mounted frame. The charge air pressure ranges at 3.2 bar, and the maximum ignition pressure is 180 bar. For generator sets, design is optimized for operation in the load range from 50 to 85 percent. The engine complies with the future emission limits stipulated by the IMO. Excellent emission results are due, in large part, to a series of measurements of optimizing com- bustion by adapting the rate of injection, and the combustion Maritime Reporter/Engineering News
