obviously depend on the condition of the propeller and hull before
the work is carried out. Propeller polishing on a well maintained
ship will reduce the fuel consumption by 1 – 3%.
are higher in case of hull fouling and in instances of heavy fouling
savings as high as 25% on the fuel bill have bean experienced on slow
fuel prices are the lowest. Taking into consideration the oil crises
of the 70’s, today's market price is about $60 per metric ton in Rotterdam
and Singapore. An
increase in fuel prices, which is bound to come, will increase the
advantages of propeller polishing and hull cleaning.
fuel consumption for the ships under review from say 30 ton per day
to say 150 ton per day, it is obvious that with a bunker fuel cost
around $60 per ton, the savings will range from $18 per day, (30 ton
x 1% x $60 per day (150 ton x at $60) - or from $5,400 to $81,000
per year assuming 300 days are spent at sea. All propeller polishing
and hull cleaning costs will often be recovered after a few days of
steaming rather than months.
benefit of a polished propeller is the reduced load on the main engine.
This results in less wear and maintenance even when staying within
the load limits of the engine.