The state of compliance with national environmental quality standards for N02 in Japanese urban areas remains at a low level. There is the possibility that the ship contribution rates to the total NOx emission and its concentration in the atmosphere are very large in urban areas near large ports. NOx emissions from ships maybe affecting habituated areas, and they should not be ignored.. However, in addition to NOx regulations by IMO, regional regulations against NOx emission from ships are expected to be implemented in future. This paper considers the technologies necessary for complying with future regional regulations, such as effective NOx reduction at partial loads, achievement of both NOx & C02 reductions and total NOx emissions reductions through improve transport systems.
The committee has made following questionnaire researches on “Recent Situation of Engine Room Fire Prevention System on Board”as the research theme in 1999 and 2000. a) Class Requirements, Each Company design standard and the built results. b) Instances of fire accident and the fire fighting. c) The problem/improvement points regarding the present engine room fire prevention/fighting system. With “Fire sources”, “Fire Detection”, “Fire fighting”and“Ventilation control”of 4 viewpoints, we have summarized the recent situation regarding engine room fire prevention/fighting system from the result of questionnaire research. In this report, the situation and the problem that was immanent there were summarized as the proposal of this committee.
The paper deals with the development of computer controlled low speed crosshead diesel engines and the application prospects for such ‘Intelligent Engines’. The main development goals are enhanced reliability, reduced operational costs and great operational flexibility with regard to output and emissions. The concept is outlined and the paper describes the fuel injection and exhaust valve actuation systems, the electronic control system, the cylinder pressure measuring system and the cylinder lubrication system. Examples of the flexibility of the injection system are given. A full-scale service test of such a system on all cylinders of the 6L60MC main engine of the 37, 500 dwt Norwegian chemical carrier M/T Bow Cecil started in late 2000. The design of the systems is outlined, followed by a description of the experience with those parts of the new system which are already in service. Finally, the first commercial orders for ‘intelligent engine’, four 7S60ME-C engines, is dealt with.
Mitsui Engineering & Shipbuilding Co. Ltd. (MES) has researched and developed the GIDE (Gas Injection Diesel Engine) for about twenty years with the intention of applying this very fuel efficient engine to both land electric power generation plants and main propulsion systems of LNG vessels. Six years ago, a pilot GIDE electric power generation plant of 40MW was built in our shipyard, as the full scale model of I.P.P. (Independent Power Plant) and LNG vessel's main propulsion system. By the good operation results of this plant, we are convinced that the dual fuel diesel propulsion for LNG vessels is feasible from the view point of not only high fuel economy but also high reliability and maintan-ability. This paper presents the result of our latest study of redundant diesel propulsion plant using the well experienced GIDE in view of reliability and maintanability.