Abstract
Ship emissions represent a significant environmental issue, directly connected to the fuel consumption and highly investigated in the last decade. Fuel consumption of a vessel is a key factor in the research of ship energy efficiency, its environmental impact, optimization and economic performance. Fuel consumption is mainly evaluated by available mathematical models, and the estimated value is used in further calculations, thus the results conceal an error. Evaluating the average fuel consumption also disables the possibility to analyze the fuel usage in different operating modes. Further, both technical and operational optimization aim at reducing fuel consumption. To achieve a quality improvement of a ship’s system, the input data on consumption needs to have minimal errors. This paper presents different methods of fuel monitoring and evaluation as well as the development of a modern fuel measurement system for fishing vessels. A short overview of fuel consumption models is given and the focus is shifted to fuel monitoring devices. Fuel monitoring devices are effective tools for determining the exact consumption and investigating the energy efficiency of vessels. The application of flow meters and fuel level sensors in the Croatian fishing fleet is presented and an example of measurements collected by the devices is included.
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