A Study Of The Measurement On-Board Ship Of Fuel Consumption For Emission Control

In this paper, the trend of worldwide emission control and the probability of emission measurement on-board ship is discussed in the context of annex VI to MARPOL 73/78. Then the inevitability of emission measurement on-board is brought forward. So it is very necessary to study the method measuring diesel fuel consumption on-board ship, which is one problem of engine test on-board.At first, the reductionism of NOx calculation and the theory of error are used to analyzing the finally influence made from the fuel consumption measurement error. The significance of fuel consumption measurement on-board ship is illustrated by the data from W6L20C marine engine.Secondly, the generally fuel consumption methods such as daily oil tank and fuel flowmeters are analyzed and compared. The select tactics of fuel flowmeters are discussed mostly. At the same time, the flowmeter is selected according to the fuel character, measurement performance and fixing condition, etc.In addition, aim at the volumetric flowmeter which is the best exactitude presently, the main factors such as oil leak, pressure loss, viscidity and density are analyzed. Because the high temperature of fuel in ship, so the temperature compensation must be considered.In the end, some sorts of ultrasonic flowmeters and their principles are introduced. And the suitable folwmeters are selected according to these. Then the notes of application and the installation rules are detailed introduced. For demonstrating the feasibility of ultrasonic flowmeter, the type 1010 much-functions ultrasonic flowmeter is introduced about its technique performance and application range.