Advanced Cooling System Fuel cooling system for marine gas oil Stricter fuel oil regulations imposed by the International Maritime Organization and national and regional authorities call for ships to change over from heavy fuel oils (HFO) to low-sulphur distillate fuel oils in designated Emission Control Switching over from HFO to light fuel poses operational challenges, including fuel viscosity, lubricity and combustion quality. Ship owners and operators must therefore modify fuel oil systems onboard new and existing ships to ensure the protection of fuel oil injection components. Cooling units are required to reduce the temperature of low- sulphur marine gas oil in order to supply a proper fuel to the Advanced Cooling System from Alfa Laval The Advanced Cooling System (ACS) is a reliable, fully auto- matic fuel cooling system that facilitates fuel oil changeover while maintaining fuel viscosity within the limits set by engine Inside the high-pressure stage of fuel conditioning, the ACS replaces the heating phase with a cooling phase, in order to keep the distillate fuel temperature low and ensure the proper The ACS can integrate the Alfa Laval Fuel Conditioning Module (FCM) as well as any other booster system, on new buildings or ships in operation. ■ Compliance with new fuel regulations ACS allows the ■ Achieve easy and full automated fuel changeover ■ Handle up to 3 different fuels ■ Perform direct (HFO to MGO) and intermediate (HFO to MDO to MGO) fuel changeover procedure ACS provides cutting edge control of variation in fuel temperature and viscosity. This makes possible to achieve safe fuel changeover procedures by avoiding any thermal shock and any drop in fuel viscosity. ■ Seamless communication between ACS and FCM for automatic and reliable fuel changeover procedures ■ Full compatibility of ACS with any fuel conditioning module, even from other suppliers ■ ACS is fully automated and easy to operate ■ Possibility of full process control from remote panel ■ Full changeover procedure customization by controlling ■ Optional chiller unit available for the supply of proper ■ Possibility to develop ACS tailor made versions on

Key components The ACS scope of supply includes everything needed, with the exception of pipes and cables, to construct a complete fuel cooling system for newbuildings or to retrofit fuel supply systems on existing vessels. ontrol system C ACS operation is steered and monitored by a control panel, and can be equipped for different levels of remote control: Basic – free contacts (only alarms and readings) xtended – free contacts (change over start up and E alarms and temperature readings) odbus – full remote control through onboard M automation system ­ CS Cooler A The ACS is equipped with a heat...

Operating principle The ACS operation is based on temperature adjustable s p ­ et­ oint and viscosity control operated by FCM viscosity sensor. hangeover from HFO to MGO C To initiate the switch from HFO to MGO, the system gradually shifts the changeover valve (V1) from HFO position to MGO position and reduces the heating power in order to control fuel viscosity. The combination of the valve movement and continuous control of heating power ensures a safe and gradual changeover without the risk of thermal shock. Once the programmable set point temperature has been obtained, the ACS shifts the...