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Reducing Fuel Costs (continued from page 21) and shore support staff. Although modern diesel engines need only a bare minimum of supervision once operating, it is important to insure that the engine is well monitored by both automatic systems and a very competent cadre of marine engineers—individuals with a very thorough knowledge of diesel en- gines and the uncanny ability to detect problems before they be- come serious. What follows is a synopsis of the technological activities and accom- plishments of many diesel engine manufacturers addressing the challenges they face in designing marine diesel engines that will help usher in the 21st century. B&W ALPHA Circle 71 on Reader Service Card B&W Alpha Diesel A/S of Fred- erikshavn, Denmark, is a com- pany of the M.A.N.-B&W Group that designs, manufactures, mar- kets, and services complete vessel propulsion systems. Last year the company completed the integra- tion of the in-line and V version of Highest performance valves afloat: Wafor-Sphere! Time's gone when your on|y choices for the hazards of marine service were bulky and costly gate and globe valves. Or rubber-lined butterfly valves with their limited pressure/temperature capabilities, short cycle life, and tearing liners. Jamesbury Wafer-Sphere" high performance valves are pushing all of them right overboard! These revolu- tionary valves suit practically every ship's 2]h" and larger size valve requirement. How good? Check these features: • Flexible-lip TFE seat that gives tight shutoff up to 1480 psi, temperatures ranging from cryogenic (-320°F) to +500°F-there's no metal-to-metal contact. • More compact, much lighter, easier and faster to install. • Greater corrosion resistance, much longer - J . H ^ cycle life, much easier and less expensive to (•• ^ . ^ - • Optionally available with a wide choice of hi m Jamesbury actuators for both automatic on-off Ju^ j^^^HBIHj ^jfp % and proportioning control. || . ^SSByf «; | f^'HR OL Materials and designs include nickel aluminum (J|j If. I bronze, 316 stainless steel. Alloy 20, Monel, plus and lugged, standard and fire-tested configurations—to - ** - j^Sm r- fill the widest possible range of shipboard services. " * jKmL Approvals include U.S. Coast Guard (Category A JjlmM and positive shut-off valves), Lloyd's Registry of Shipping, ^^B^m Germanischer Uoyd, American Bureau of Ships, and Dept. of V^^Hfeh^^j^^SQ^^Hr^ Transportation-Marine Services-Canada. Valves have been tested and ^ fully qualified by an independent laboratory to U.S. Navy shock (MIL-S-901) and vibration (MIL-STD-167-1) specifications. . §S Q[ 1 ^ h the 20/27 M.A.N.-B&W diesel en- gine and the in-line version of the 32/36 M.A.N.-B&W engine with existing Alpha controllable-pitch propellers and gearboxes. This has resulted in four-cycle diesel pro- pulsion systems developing as lit- tle as 680 bhp at 1,000 rpm, which can burn heavy fuel oil up to 2,100 sec. Redwood 1 at 100 F. A new series being offered is the 20/27-VO propulsion system. While the engine itself is not new, the system incorporates the new Al- phatronic I and Alphatronic II— the company's latest electronic re- mote control systems. Features of the new control systems include: reliable attainment of economical operation through the optimum combination of engine rpm and propeller pitch; simple controls re- quiring minimum attention of the watch officer; simple installation, basically a single electrical cable connection from the wheelhouse control panel to the engine room; easy maintenance, with as many functions as possible on easily re- placeable, printed circuit boards; and a clear, easily understood dis- play of essential information. The Alpha Diesel product line now includes the following series: 20/27, 136 bhp per cylinder at 1,000 rpm; 23L, 155 bhp per cyl- inder at 825 rpm; 23/30, 170 bhp per cylinder at 825 rpm; L28/32, 285 bhp per cylinder at 775 rpm; and L32/36, 500 bhp per cylinder at 750 rpm. B&W HOLEBY Circle 72 on Reader Circle Card B&W Holeby Diesel A/S of Den- mark manufactures 4-stroke die- sel engines in the power range from 450 to 5,500 bhp. The com- pany also supplies diesel genera- tor systems of shipboard use. In addition to diesel engines, Holeby production includes major components such as crankshafts and connecting rods for use by li- censees in the manufacture of 4- stroke B&W engines, as well as spare parts for its own engines. The company also manufactures fuel oil mixing units and other auxiliary equipment. As a result of recent develop- ment projects, all types of Holeby engines can now be supplied in uprated, four-valve versions that can be operated efficiently on the same heavy fuel as the big main propulsion engines. Holeby calls this development its Unifuel system. BERGEN DIESEL Circle 58 on Reader Service Card Reducing fuel expenses, which are representing an ever-increas- ing part of a ship's total operating cost, has always been one of Ber- gen Diesel's main endeavors. Gen- erally, there are two ways to achieve that: (1) building engines THE SURE ONES •* Circle 189 on Reader Service Card For full details on Jamesbury Wifer-Sphere valves, ball valves, actuators and control devices, the most outstanding product line for the marine industry, write or call Jamesbury Corp., 640 Lincoln Street, Worcester, Massachusetts 01605 U.SA. (617) 852-0200. International manufac- turing/sales locations: Ottawa, Canada; Rustington, West Sussex, England; Wasserburg, Federal Republic of Germany: Tokyo, Japan; Singapore; Mexico City, Mexico.
