Waste heat recovery economizers for marine engines

The Alfa Laval Aalborg XS-2V and XS-7V are robust smoke-tube

economizers. Easy to install, operate and maintain, they reduce

the use of the fired boiler by recovering heat energy that

otherwise would be lost through the engine exhaust gas.

This ensures a rapid return on investment. The Aalborg XS-2V

is equipped with its own steam space, which makes it a

complete exhaust gas boiler. The Aalborg XS-7V shares a steam

space with the fired boiler. The proven design of both

economizers includes a dual-inlet option, which creates high

installation flexibility.

Design

Built for simplicity and reliability, the Aalborg XS-2V and

XS-7V have a vertical, all-welded design with straight smoke

tubes. The option of dual inlets allows one economizer to

serve two engines, with half the tubes dedicated to one

engine and half dedicated to the other. This can reduce

installation costs and complexity.

The smoke-tube design is easy to clean and maintain,

especially as the high gas velocity through the economizer

minimizes fouling. If needed, individual smoke tubes can also

be repaired or replaced.