3. Steam Turbines
3.1 Main Turbine
Four main turbines in total were manufactured by Mitsubishi Heavy Industries. Ltd. (MHI), one for delivery to an RON shipbuilder and three for installation on board ships built in Japan, while Kawasaki Heavy Industries, Ltd. (RHD turned out three main turbines. Also, four new-buildings (one built by KHI, two built by H〜ndai Heavy Industries Co., Ltd. (HHI), RON, and one built by Hanjin Heavy Industry Co.,Ltd. (UHIC), (RON) with main turbines of MHI manufacture on board were cornmis-sioned in service.
Demand for LNGCs is strong not only in Japan but in RON and 〜u- rope as well. It therefore is expected that demand for main turbines also will remain brisk henceforth. Especially in RON, the cut in price quotation offered by shipbuilders of the country for the construction of LNGCs has stimulated the LNGC market there.
Also, there is a move toward a new LNGC propulsion plant, which de- serves careful attention.
3.2 Auxiliary Turbines
The domestic production of auxiliary turbines in 1999 included 22 generator turbines manufactured by MHI and eight generator turbines manufactured by Shinko md., Ltd.
Though most of the generator turbines manufactured by MHI were for use on board LNGCs, several were installed on board diesel-driven ships.
Also, the cargo oil pump and ballast pump turbines turned out came to 383 in total, all manufactured by Shinko Electric Co.,Ltd.
The demand for LNGC newbuildings is expected to remain brisk henceforth, and so is the demand for generator turbines which are to be installed in these newbuildings.
The cargo oil pump and ballast pump turbines were manufactured to meet the demand for them resulting from the increase in number of oil tankers built in Japan and RON. It is estimated that the production of these turbines will considerably decline in quantity in 2000 due to the d& crease in number of orders for the oil tankers.
[Yasunori TASHIMA]
4. Gas Turbines and Turbochargers
4.1. Gas Turbines
The operational results of the aero-derivative gas turbines have been increased as the main engine especially for naval vessels taking advantage of its characteristics.
The total number of naval vessels on which gas turbines are installed in Japan exceeds 50 as of the end of 1999 including those under construction or planning.
The naval vessels which entered in services in 1999 were two "Murasame" type DD class escort vessels (built by MHI and SHI) which were ordered in 1994 fiscal year, in which 2 sets of the LM2500 gas turbine by GE in US (16,500PS, manufactured by IHI) and the SMIC gas turbine by RR in UK (13,500PS, manufactured by KHI) are installed with twin shaft COGAG (COmbined Gas turbine And Gas turbine) system. In 1999, two "Murasame" type DD vessels (to be built by MHI and SHI, and delivered in March 2003) were contracted.
As for the gas turbine for on-board generators, the M1A-25 (1,500kW) gas turbine developed by KHI itself and the 501-K34 gas turbine by Allison in US (2,500kW, manufactured by IHI) are the mainstream now. Three sets of M1A-25 were installed on 4 "Murasame" type DD vessels, and total 12 sets are in service and 27 sets will be installed on the succeeding 9 DD vessels. Three sets of 501-K34 were installed on 4 "Kongo" type DDG class escort vessels, and total 12 sets are in service.
In the trend of the novel technology on the marine gas turbine, the "Technical Research Association of Super Marine Gas Turbine" comprising 5 Japanese gas turbine manufactures established in 1997 is proceeding to develop the gas turbine for marine propulsion (2,500kW class) in which the amount of NOx is about 1/10 compared with the existing high-speed diesel engines and the fuel consumption is approximately equal to that thereof. The development is to be completed by 2002.
[Takafumi NAKAGAWA]
4.2 Turbochargers
In Mitsui Engineering & Shipbuilding Co.,Ltd. (MES), the accumulated production number of NA type turbochargers has reached 1,112 units in the end of 1999 since they started the production in 1981 under the license of MAN-B&W in Germany. MES produced 68 units of NA48, NA57 and NA70 turbocharger in 1999. This production number was decreased for the first time in the last 4 years due to the reduction of the demands of marine propulsion diesel engines. These include 32 units of the new type turbochargers of NA48/S, NA57/T9 and NA70/T9 which were developed after 1995.
