Cooler performance varies over time
Historically, air coolers were designed with an additional heat transfer surface area to counter the inevitable build-up of deposits on the airside. Modern economics means that the air coolers designed more recently have limited spare capacity to deal with the downturn in performance associated with contamination. Additional surface area increases costs, and there are less generous design parameters in these times of austerity. Inevitably, carbon or sulphurous deposits will cling to the fins of the air cooler as time goes by. As the layers build up, efficiency decreases and performance is affected in terms of pressure loss and ultimately - fuel economy.
Tersus – high performance easy to maintain
The cleanliness of the heat transfer surface area of the cooler does not only improves the engine efficiency but extends the lifetime of the cooler too. Vestas aircoil has developed a new alternative to ultrasonic cleaning which additionally does not require removal of the cooler from its point of installation. A specially formulated foam reaches the entire external surface of the air cooler and is left pumping through the fins until the cooler is clean. The contaminated foam turns to liquid and is dealt with via normal separation processes to ensure there is no environmental impact. The cleaning process is performed using a dedicated cleaning foam generator which can be installed next to the engine or is available as a mobile unit able to service many engines.