The two-stroke marine diesel engine on its way to higher powers

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The two-stroke marine diesel engine on its way to higher powers

Broeze, J.J. / Molen, E.A. van der / Bastenhof, D.

The whole of present-day marine engineering centres around the basic fact that heavy fuel oil is the main source of energy available all over the world at the most attractive prices. Coal went out, virtually with colonialism and cheap labor, and the more expensive lighter petroleum fuels with the advent of the highly alkaline cylinder lubricant, so that the struggle between steam and diesel power is fought out on an equalized fuel basis. Whichever of the two will win depends on factors other than straight forward fuel economy, where the oil engine is clearly superior, and may be expected to remain so for a long time. The steam plant would require a refinement and complication of design for further improvement which would appear at present unsuitable for the hardships of marine life. But it has attractive points where it comes to minimizing secondary costs, such as those of lubricants and of maintenance, and on these scores the diesel engine will have to get all the possible attention from its sponsors in order to keep its present leading position. The other competitors in the race are so far behind that we need not consider them here. After these general observations on the most likely factors to control the chances of success in the ultimate development of the low-speed marine diesel engine, a more detailed report follows of studies made on heat transfer conditions. In this study it has been attempted to correlate testbed results with existing theories, and also to find plausible explanations for such results, thus probing deeper in the underlying phenomena of heat transfer and their laws.