Part-Load Optimisation is a tuning method that optimises fuel-oil consumption during the part-load operation of four-stroke, small-bore MAN auxiliary engines.

Finn Fjeldhøj – Head of Small-Bore, Four-Stroke Engineering – MAN Diesel & Turbo, said: “Part-Load Optimisation works on the principle that fuel consumption is reduced at low and part load at the expense of a higher fuel consumption in the high-load range, without exceeding the IMO NOx limit.”

In particular, this method delivers fuel-oil savings of, typically, up to 5 g/kWh depending on engine type and load point, and improves the condition of key engine components due to combustion process. The same, relative fuel-consumption savings also apply when applied in combination with an SCR-system for IMO Tier III compliance.

Part-Load Optimisation is recommended for GenSets that often run at part-loads below 75% MCR (especially the load range from approximately 40 - 65% MCR) and optimises engine performance at 60 - 65% MCR, the company explained.