Royston has upgraded its enginei fuel management system to include low-cost emissions monitoring capability to calculate and analyse vessel emissions.
The technology captures key engine performance data, engine and fuel specification and flow rates, which it uses to calculate a range of ship emissions measurements. No exhaust gas analyser is required to do this.
Sulphur oxides (SOx) and CO2 can be calculated from looking at the adjusted fuel consumption and air mass flow alongside combustion efficiency. SOx levels can then be advised and predicted to assist with decisions in fuel switching when entering and leaving Emission Control Areas (ECAs).
Nitrogen oxides (NOx) emissions can be calculated using the carbon balance method, which refers to the NOx Technical Code MEPC 177 (58), statistical algorithms and engine test data. This can be combined with torque, RPM and other engine and fuel data to ascertain the specific NOx emissions factors to be calculated from comparison with regulations from the International Maritime Organization (IMO).
Furthermore, the upgraded enginei system also provides information on combustion efficiency to help understand the relationship between engine power, fuel consumption and engine speed.
The data obtained is automatically generated into daily reports that can be accessed by touchscreen monitors on the bridge and the engine room, showing key aspects of vessel performance criteria. The data can be presented in simple dial displays and gauges or there is the option for more complex presentation of trending graphs against voyage data.
In addition, remote data sharing is possible to enable onshore management to access the information through a secure online portal and web dashboard. Computer generated charts, graphs and Google maps are used to show the complete operational profile of a vessel. 24/7 remote access is also available for continuous monitoring and assessment.
According to Damian McCann, product manager for fuel management systems at Royston, the new system uses all available engine performance data to enable operators to continuously and accurately measure emissions and report on the findings.
“With maritime emissions monitoring becoming a critical factor for vessel operators, the new system provides a highly cost effective and accurate method to demonstrate environmental responsibility and compliance with the ever stringent industry regulations” he stated.
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