Alfa Laval Aalborg electric steam boiler（ESB）

Aalborg electric steam boiler

Onboard steam production using shore power or surplus

electricity

The Alfa Laval Aalborg electric steam boiler is a simple, com pact

and combustion-free solution for meeting vessel steam needs.

By utilizing shore power or the electricity already on board, it

delivers steam without producing additional emissions. When

the vessel is connected to the onshore grid, the fired boiler can be

shut down completely, reducing emissions from tank to wake.

Application

As the marine industry decarbonizes, more ports around the

globe are investing in shore power installations. Yet while shore

power provides electricity during a port stay, the vessel’s need for

steam remains. Although fired boilers can generally be used in

port, direct emissions are best kept to a minimum.

With the Aalborg electric steam boiler, vessels can meet the

needs of steam consumers without resorting to combustion.

The boiler can use either the onshore grid or the extra electricity

available on board, such as the surplus on LNG carriers and

FSRUs that comes from using the gensets to manage boil-off

gas (BOG). In both cases, it improves fuel economy and the

vessel’s green profile.

Benefits

• Steam or hot water production without direct emissions

• Reduced overall emissions and carbon footprint

• Reduced fuel consumption and associated costs

• Small installation footprint

• High turn-down ratio for increased efficiency

Working principle

The Aalborg electric steam boiler is much simpler in design and

operation than a traditional fired boiler. It comprises electric

heating elements that work in steps, with each element supply

ing six stages. Load regulation is possible down to 60 kW.

When steam is required, the relay-based control system en ables

the heating elements incrementally until the demand is met.

If the boiler is used at sea, where the electricity supply varies, it

can be signalled to start only when sufficient power is available.

Installation

The boiler is compact and has a small footprint that sim plifies

placement on board. Available in three size configurations, it is

delivered as loose compo nents and installed horizontally.

Maintenance

No regular maintenance is required. However, the boiler should

be inspected once per year to ensure that its heating elements

are working properly.

Approvals

The Aalborg electric steam boiler is type approved by all major

marine classification societies.