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BRUNVOLL BRUNVOLL A.S. 6415 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. 56 STREET. MIAMI, FL.33166 TELEPHONE (305) 592-7350, FAX (305) 591-8223 Circle 212 on Reader Service Card or visit www.maritimereporterinfo.com BRUNVOLL ARE PRODUCERS OF Tunnel Thrusters Azimuth Thrusters Control Systems Low noise Thrusters year as a consequence of using LNG fuel instead of diesel oil. The two ships are expected to be completed for Nor- wegian owners in 2003, and will bunker liquefied gas from the Coast Center Base at Aagotnes, near Bergen. New generations of vessel introduced under the Celebrity Cruises and Royal Caribbean brands have given form to the concept of the combined gas turbine and steam turbine, integrated electric drive system (COGES), while gas tur- bines have been specified as part of the electrical power and propulsion system on a number of cruiseship newbuilds in conjunction with diesel-driven main gensets. Issues of design, operating flex- ibility, through-life costs and environ- mental compliance have colored the choice of such systems. Now the MAN Group has broadened the range of solutions available to the cruiseship sector by offering combined diesel and gas turbine (CODAG)-based electric power installations. Drawing on the respective strengths of MAN B&W Diesel and MAN GHH Borsig, a vari- able number of diesel engines can be married with one or two gas turbines to provide a codag electric solution match- ing specific needs. The increasing influ- ence of environmental constraints on cruiseship operations have provided the impulse for a rallying of forces within the MAN organization. A CODAG configuration can better enable a vessel to economically meet varying environmental criteria without the whole system having to be engi- neered to the most extreme, local con- trols. For instance, low-speed cruising might be accomplished in ecologically fragile or sensitive areas using just the gas turbine component of a CODAG plant, by virtue of the turbine's consider- ably cleaner emissions performance rel- ative to a diesel. The CODAG approach also offers benefits from a ship design standpoint, given the high energy density encapsu- lated in compact turbine plant, with its favorable implications for weight and machinery location. The MAN companies have teamed-up to provide cruiseship powering configu- rations spanning plant outputs from 30- MW to 120-MW. MAN B&W's indige- nous medium-speed diesel portfolio extends to unit powers of nearly 19,000- kW, and potentially to 24,000-kW with the largest engine from the Pielstick sta- ble, while two gas turbine models of 10,500 kW and 26,000-kW have been brought to the combined offering by MAN GHH Borsig. MAN B&W's development of its Invisible Smoke (IS) technology gives an added edge to the environmental cre- dentials of an MAN CODAG installa- tion. The IS option, fully applied in a Marine Propulsion Annual the 5,700-17,100 kW unit power band. A concerted drive is under way in Nor- way to use LNG as fuel in offshore sup- port ships, ferries and other coastal ves- sels, prompted by a desire to broaden the use of Norwegian resources of gas on both national, economic and environ- mental grounds. Perceived as a 'clean' fuel, LNG combustion results in consid- erably lower emissions of oxides of nitrogen (NOx) and particulates com- pared with conventional bunker fuels, and carbon dioxide release is also reduced. Following the milestone adoption of a gas-electric propulsion system in the 312 ft. (95-m) double-ended fjord ferry Glutra, burning locally-derived LNG two new supply vessels to be built for operation in the Norwegian sector of the North Sea are to be equipped with main machinery adapted to run on LNG It is estimated that NOx output from the ships' plant will be cut by 420-tons per THRUSTERS FOR MANOUEVRING AND PROPULSION OF SHIPS www.brunvoll.no 3600 THRUSTERS delivered and more than 2000 Ships equipped with BRUNVOLL THRUSTERS Kxchang( Optimizer u have demonstrated the practical suitability of our cylinder head components for fifty years now. In future we //ant to concentrate our efforts towards improving the operational efficiency of your engine. It is your requirements which will dictate our approach - this is what matters most! Let's discuss your individual requirements for the best possible productivity of your diesel engine. Be it components, added /alues or //hole systems - just get in touch and we'll optimize /our gas e/change. MARKISCHES WERK. HALVER >74 • Fb/ "3® mwh.de 44 Circle 255 on Reader Service Card or visit www.maritimereporterinfo.com Maritime Reporter & Engineering News
