Calculating ship fuel consumption

Fuel is an expensive commodity and knowing the fuel consumption of vehicles is essential for minimising costs and increasing efficiency. 



Calculating ship fuel consumption, especially on longer journeys, becomes even more critical. With this data, ships can form better strategies towards achieving maximum fuel efficiency.


Bell Flow Systems was recently asked to supply a fuel consumption system on an ex-Navy vessel. The Spirit of Samsø was originally known as Y303, a Barsø class vessel belonging to the Danish Navy. Innovative marine engineering company NAVA is currently re-purposing The Spirit of Samsø in to a luxury yacht. It required a monitoring system installing, in order to measure the fuel consumption of the vessel.


The fuel system required two flow meters, one to measure the fuel supplying the engine, the other to also measure the fuel flow back to the tank.


Bell Fuel Systems took into account the engine whilst idle and also when at full capacity. It was also important to ensure that the meter did not reduce the pressure too much so as to starve the engine of fuel.


For the installation, Macnaught MX series oval gear meters were used, as they offer a high turndown ratio and a low pressure drop. They were paired with a Fluidwell F116 differential flow computer. This meter gives visualisation of the fuel flow rate and total volume of both the flow and return to and from the engine. The computer also handles the flow calculations to clearly show both the current and total fuel consumption.


With this simple solution installed, fuel consumption monitoring is more efficient and ultimately the overall running costs for the vessel decreased.


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