MAN Diesel & Turbo has announced that its part-load optimisation initiative has achieved 180 orders since its introduction. 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.

MAN Diesel & Turbo head of small-bore, four-stroke engineering,  Finn Fjeldhøj 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 NO_x limit. We can deliver new engines pre-optimised, or retrofit as necessary. Both part-load optimisation solutions have proved popular with the market to date, as evidenced by this strong demand.”

Part-load optimisation helps shipowners to maintain their auxiliary engines in good working order while reducing fuel oil costs. It 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.

It is available for all new Holeby engines and can be retrofitted on all existing engines. The tailor-made retrofit kits cover all components, qualified service fitters and calculations of cost benefit; engine tuning can be executed with a charge-air blow-off valve or waste gate.

Part-load optimisation 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 its superior combustion process.

The same, relative fuel-consumption savings also apply when applied in combination with an SCR-system for IMO Tier III compliance.