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Alfa Laval S.p.A.

Aalborg-EH-100

The Alfa Laval S.p.A. Aalborg-EH-100 is an electrically heated marine boiler in the Aalborg EH model series represented in the supplied equipment library. It produces useful boiler heat without a fuel-fired burner by converting electrical energy directly into heat through the installed electric heating elements. On board, this type of unit can support steam or hot-water demand when electrical power is available and combustion is undesirable or unnecessary. It is normally installed as part of the ship's boiler-water, feedwater and distribution system together with the required controls, safety devices and electrical switchgear. The 100 suffix identifies this particular EH size; exact electrical load, evaporation or heating capacity, design pressure and physical dimensions must be taken from the manufacturer documentation for the installed model. Compared with a fired boiler, maintenance focus shifts from burner and fuel-system condition to heating elements, electrical insulation, contactors or power-control equipment, water quality and pressure-system integrity.

Alfa Laval S.p.A. Aalborg-EH-100

Components & Design

Component data being added…

Technical Data

Model number Aalborg-EH-100
Evaporation 140 kg/h
Design pressure 10 bar
Weight (dry) 1200 kg
Application electric heated boiler, 100 kW
Standards EU PED 2014/68/EU, classification by IACS members

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Common failures & inspection points

●Heating-element failure caused by electrical ageing, overheating, scale or insulation breakdown, indicated by reduced heating output, phase imbalance, earth-fault indication or protective trip
●Scale formation on heating surfaces caused by inadequate water treatment, indicated by poor heat transfer, element overheating or increased energy consumption
●Low-water condition caused by feedwater-control or level-sensing faults, indicated by low-level alarm, heater trip or unstable boiler operation
●Contactor, thyristor or power-control failure caused by electrical wear or overheating, indicated by missing heating stages, nuisance trips or uneven load
●Pressure-part or flange leakage caused by corrosion, gasket deterioration or thermal cycling, indicated by visible water or steam leakage
●Sensor or control-system fault caused by wiring, transmitter or thermostat problems, indicated by unstable temperature or pressure regulation and repeated alarms

Service & Maintenance

Inspect electrical heating elements and terminal boxes for overheating, loose connections, contamination and insulation deterioration. Verify protective earthing, insulation monitoring and electrical safety devices in accordance with the vessel's procedures. Check water level controls, feedwater system, pressure and temperature instruments, safety valves and alarms. Inspect the boiler shell, flanges, manholes and accessible internal surfaces for corrosion, scale and deposits. Review water-treatment records and investigate abnormal make-up-water demand. Refer to manufacturer documentation for exact electrical test values, element replacement procedures, pressure tests and operating limits.

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Replacement Parts

Carry heating elements or approved replacement element assemblies according to duty criticality, plus contactors, fuses or protective devices, control relays, temperature and pressure sensors, level-control components and suitable gaskets or seals. Keep terminal hardware and manufacturer-approved electrical service parts for the power-control cabinet. Exact spare quantities should follow the installed electrical configuration and manufacturer recommendations.
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Equipment Model #153815 · ✓ still in production