(3) A study on deNOx equipment for marine use
The selective catalytic reduction system (SCR) was installed, and the reduction effect of NOx to various operational conditions was analyzed using the test engine. As a result, it was confirmed that SCR is effective on marine diesel engines.
(4) A study on the harmful exhaust gas components, such as N2O
The cause and mechanism of the generation of the harmful components related to the global warming effect were investigated. As a result, it was confirmed that the concentration of N2O is strongly affected by the sulfur content in fuels, as shown in Fig. 2.3-2.
Fig. 2.3-2 N2O Emission Charactersitics by Sulfur Content in Fuels
(5) A study on evaluation of harmful exhaust gas from ships and examination on the trend
Pursuant to the study in the previous year, the effect of the operational condition of the ships and the secular changes on the emission of the harmful exhaust gas was examined through the measurement of exhaust gas on actual ships based on the joint research with the Maritime Safety Agency and the Institute for Sea Training.
2.4 Development and Production by Domestic Manufacturers
2.4.1 Akasaka Diesels Limited
(1) Development of new model
The new model of Akasaka-Mitsubishi UEC6OLS II type engine was added in the lineup of Akasaka-Mitsubishi UE type engines which consist of 11 series, i.e. 33-60 type, and it became possible to supply engines of 3,500-21,600PS output.
The annual results of manufacture of UE type engines in 1998 recorded the maximum in the past. On the other hand the type approval test of 5UEC33LS II by Nippon Kaiji Kyokai was carried out in May, 1998. At the same time, the aggregate number of products of UE type engines in the company since 1961 reached 1,000 sets.
(2) Annual results of manufacture
2.4.2 Kawasaki Heavy Industries, Ltd.
(1) Development of new model
The latest high-powered engine, Kawasaki-MAN B&W 6S46MC-C type engine which was the first model in the world was completed as the main engine for the bulk carrier of 30,000 dwt. and obtained the type approval from 13 classification societies, such as Lloyds, ABS and NK in February, 1998.
The first 6S50MC-C type engine of the company, which is among the same series engines, was also completed and delivered in February.
Table 2.4.2-1 indicates the principal particulars of MC-C type engines compared with those of MC type engines and Photo 2.4.2-1 shows the general view of 6S46MC-C type engine at the type approval test.
Table2.4.2-1 Principal Particulars of 6-Cylinder MC-C Series Engines Compared with MC Type Engine
