OPS calculation tool

This website offers a simple calculation tool that helps develop a feeling for the costs and benefits of OPS. The tool is filled out with characteristic data, but can be readily adapted to the local situation by changing the cost figures and data on the number of ships and their fuel consumption.

Main goals
The tool can be used for two main specific goals: - to calculate the annual costs and benefits of OPS - to calculate the annual emission reduction.

In addition, the tool permits estimation of the effects of different parameters on costs and emissions, thus providing insight into cost effectiveness.

In the cost effectiveness calculation, costs are balanced against the total amount of air pollutants prevented. Figures for the relative harmfulness of air pollutants have been taken from a study by AEA technology, for which click here. Because of their more damaging nature, SO₂ and PM have been assigned a higher weighting factor. The calculation algorithm is as follows: pollution units (tonnes) = 1* NO_x (tonne) + 2,2 * SO₂ (tonne) + 12.8 * PM (tonne). The cost effectiveness is expressed in € per pollution unit).

Click here for the tool.