Alfa Laval Aalborg OL Large-capacity fired boiler with multi-fuel and hybrid options

The Alfa Laval Aalborg OL is a high-capacity, fired marine

boiler for producing large amounts of steam or hot water.

Available in two design pressures, it has a top-fired design

that maximizes heat transfer and minimizes pressure loss.

Ready for the fuel transition, the OL can use oils, biofuels

and one alternative fuel of your choice. Additionally, it can

be configured as an electric hybrid. These options can be

implemented directly, or the boiler can be prepared for their

installation later.

Benefits

• Configuration for your choice of alternative fuels  – 

implemented now or later

• Hybrid and hybrid-ready options for electric operation

• Trouble-free uptime, secured through robust design

and user-friendly control

• Optimized furnace design with easy inspection access

Application

The Aalborg OL is a flexible marine boiler that can support

vessel operations in multiple ways:

• Steam and hot water generation:

The Aalborg OL is primarily used to provide steam

and hot water for:– Cargo tank heating– Tank cleaning–

HVAC– Engine room consumers

• Shared steam drum:

The Aalborg OL can support one or more exhaust gas

economizers, serving as a shared steam drum for waste

heat recovery.

• LNG safety:

On vessels using LNG as fuel, the Aalborg OL can:– Support

boil-off gas (BOG) management by safely

combusting BOG that cannot be consumed by an

auxiliary engine or genset– Combust a free flow from the LNG

tank if the vessel’s compression train should fail

– Combust the mix of inert gas and methane that arises

before and after tank inspection, eliminating detours

for gas disposal

Design

Easy to install, the Aalborg OL operates on oils and biofuels and

can also be configured for one alternative fuel: LNG, methanol

or ammonia.* As standard, it is delivered with a preassembled

Aalborg MF SA burner for LNG operation.** The boiler and

burner are both engineered and produced in-house to ensure

the highest reliability.

• Aalborg OL boiler:

The Aalborg OL is a top-fired, two-drum boiler with a

design pressure of 9 or 18 bar(g). Its furnace, which contains

minimal refractory, is shaped to provide optimal combustion

conditions. Membrane walls with gas-tight polygonal panels

make the furnace resistant to gas pulsations.

The boiler’s combustion section comprises straight pin

tubes with bent pins, which provide a high coefficient of heat

transfer and reduce pressure loss. Combustion heat from

the burner is distributed uniformly through the combustion

section, which ensures optimal heat transfer and reduces

damaging thermal stress inside the boiler.

• Aalborg MF SA burner:**

Built with Alfa Laval’s innovative MultiFlame (MF)

concept, the Aalborg MF SA is a steam-atomizing burner

that supports conventional fuels and gas fuels like LNG.

By pre-mixing air and gas, it reduces the production of

CO2. NOx and other emissions.