In today’s competitive market, ship owners and operators need clearer guidance on the potential performance benefits of fouling control coatings for their specific vessels to make optimal coating choices. I have outlined the development of models to predict the impact of fouling control coating choices on ship operational efficiency.
Ship owners and operators are sometimes sceptical about comparing the performance claims of different fouling control coatings, partly because the information underpinning the claims can be unclear. As such, there is a need for more accurate and transparent predictions of fouling control performance. In response to this, AkzoNobel has created models predicting the impact of fouling control coating choices on ship powering requirements and operational efficiency. This research aims to provide data that allows owners and operators to compare powering requirement, fuel consumption, cost / benefit and environmental impact analyses for potential fouling control coating choice over the full drydock cycle, empowering them to make the most economical and environmentally optimal choices for their vessels or fleets.
AkzoNobel’s models can be broken down into two main sections. The first section examines how the total hull roughness of a vessel changes over a drydock cycle for each different coating option, as it is affected by the ship’s operational profile. The second section models how total vessel roughness affects total ship resistance, and the resultant powering requirements – essentially, how increased hull roughness impacts performance.
To ensure detail and accuracy, the model for the total roughness change in the first section uses a new total roughness treatment that takes account of the micro and macro roughness of the hull and the impact of biofouling. The model also considers the effect of substrate preparation and coating application choices on surface roughness, and builds on an enhanced understanding of the impact of vessel operational profile, including hull cleaning events and coating performance.