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Alfa Laval S.p.A.

Aalborg-ESB-2500

The Alfa Laval S.p.A. Aalborg-ESB-2500 is an electrically heated marine steam boiler from the Aalborg ESB family. It produces steam or hot water using electrical power instead of firing fuel in a burner, allowing steam production from shore power or available onboard electricity. The boiler is integrated with the vessel's feedwater, steam, condensate, safety and control systems and is normally installed in a machinery or technical space suitable for pressure and electrical equipment. Its maintenance profile differs from an oil-fired auxiliary boiler because the critical heat-producing components are electrical heating elements and switching equipment rather than a burner and combustion system. Water level protection, feedwater quality, electrical insulation and reliable staging of the heating elements are therefore central to safe operation. The designation Aalborg-ESB-2500 identifies a specific Aalborg ESB electric boiler configuration in the supplied equipment list. Exact capacity, pressure and temperature limits, materials, connection details and internal configuration must be verified from the unit nameplate and manufacturer documentation; refer to the manufacturer documentation for the exact figure.

Components & Design

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Technical Data

Model number Aalborg-ESB-2500
Evaporation 3500 kg/h
Design pressure 10 bar
Weight (dry) 6800 kg
Application electric steam boiler 2.5 MW
Standards EU PED 2014/68/EU, classification by IACS members

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Common failures & inspection points

Heating-element deterioration or electrical insulation failure causes reduced steam production, earth-fault indications or protective trips
Scale or deposits caused by unsuitable feedwater treatment reduce heat transfer and can overheat heating surfaces
Level-sensing or feedwater-control faults cause unstable water level, abnormal pump cycling or low-water shutdown
Worn contactors, relays, fuses or power connections cause individual heating stages to fail or electrical terminals to overheat
Leakage from valves, flanges or pressure-containing connections produces visible water or steam loss and difficulty maintaining pressure

Service & Maintenance

Inspect the pressure vessel, valves and external piping for leakage, corrosion and damaged insulation. Function-test water-level indication, low-water protection, feedwater control, pressure control, alarms and shutdowns according to the approved procedure. With the equipment safely electrically isolated, inspect heating-element connections, contactors, relays and terminals for looseness, discoloration or insulation damage. Maintain boiler-water chemistry and verify safety devices in accordance with manufacturer, class and statutory requirements; refer to the manufacturer documentation for exact electrical test values and water limits.

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Replacement Parts

Carry configuration-specific heating-element components where practicable, together with suitable contactors, relays, control fuses, level-control components, pressure-control components, valve seals, flange gaskets and feedwater-system consumables. Electrical spares must match the installed voltage and control specification and should be verified against the serial-number documentation.
Equipment Model #153841 · ✓ still in production