Boiler · Boilers
The Alfa Laval S.p.A. Aalborg-ESB-630 is an electric steam boiler in the Aalborg ESB family for combustion-free steam production on board ships. The unit converts electrical energy into boiler heat and is integrated with the vessel's feedwater, steam, control and safety systems. It can be used when shore power or onboard electrical generation makes electric steam production preferable to operating a fuel-fired auxiliary boiler. The absence of a burner and fuel system reduces combustion-related maintenance but places greater importance on heating elements, electrical protection, water level control and water chemistry. The 630 suffix identifies this particular ESB size; exact electrical rating, steam capacity, design pressure and dimensions must be taken from the manufacturer documentation. The boiler is particularly relevant to harbour, low-emission and hybrid operating modes where steam demand remains even when main propulsion or fired boilers are not in service.
What our service work and the manufacturer documentation say about keeping this model running.
Inspect heating elements, terminals and electrical cabinets for overheating, contamination and loose connections. Test insulation, protective earthing and electrical protection in accordance with the vessel's electrical procedures. Verify feedwater regulation, gauge or level indication, low-water trips, pressure controls, safety valves and alarms. Inspect pressure parts and accessible internal surfaces for corrosion, deposits and scale. Review boiler-water chemistry and blowdown practice. Use manufacturer documentation for exact electrical measurements, element replacement, pressure-test requirements and operating limits.
Useful onboard spares include heating elements or approved element assemblies, contactors or power-control components, fuses and control relays, level sensors, pressure and temperature transmitters, and gaskets for service openings. Critical installations should also carry selected controller or interface components recommended by the manufacturer. Spare quantities depend on redundancy and the vessel's access to shore support.
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