OPS Effectiveness
There is no doubt that OPS leads to significant reduction in air pollutants in ports and areas at their vicinity. However, the case for overall energy efficiency of the OPS in terms of power used while including all the transmissions losses and overall CO emissions to atmosphere is not clear. Although both have been advocated by OPS enthusiast as justification for OPS and reduction of ship-owners’ energy cost, this topic is not certain and most likely will vary case by case.