Compared to traditional cleaning where the charge air cooler has to be removed from the engine, the Wärtsilä Delta cleaner allows the cooler to be cleaned while still in place, allowing for much more frequent cleaning. This helps to maintain the differential pressure (Delta-P) at an optimal level, leading to lower specific fuel oil consumption (SFOC).
With no need to remove the cooler for cleaning, there is no risk of damage during removal or transportation. The cooler is cleaned by injecting foam generated in the cleaning unit. The foam is fed into the cooler via pipes and hoses, penetrating from the inside out. After passing through the cooler fins, the foam turns into a watery liquid that then drains out of the cooler housing. The process takes approximately one hour per cooler, leading to considerable savings in engine down time and service man hours needed for the cleaning.