The Electric Duct Heaters are used as a braking load or dissipation of excessive current generated by the system, in case of excessive wind on the wind turbine. Reart is able to supply and size Electric Duct Heaters according to the requirements and technical specifications.

General characteristics of Electric Duct Heaters.

The electric heaters, produced by Reart, formed by several heating elements connected to each other and mounted on a single structure/frame, are designed and conceived to be used in the heating process of air flows or inert gases, or used as a load for power dissipation.

Electric Duct Heaters are used for different types of applications:

• Air handling unit (AHU)
• HVAC air conditioning systems
• Coating plants (ovens)
• Load cells for power dissipation (wind power plants)
• Heating Silos and Autoclaves
• Drying plants, fume reduction plants, air drying plants;
• Heating railway cabins

The heating elements are of the ‘finned heaters’ type, to facilitate the heat exchange between the heater and the gas to be heated. See the section ‘Finned heaters’ for the type of elements applied. For applications with high operating temperatures on the process, smooth elements are used to form the heating assembly of the electric coil.

They are sized by the technical office, with the help of software for thermodynamic sizing, thanks to which it is possible to obtain the real operating conditions, based on the needs and specifications of the customer to create air flows at a controlled temperature. Thanks to the use of this software for the sizing of Electric Duct Heaters, it is possible to define the main parameters including:

• Electric power needed
• Process side pressure drops
• Surface load or specific power
• Maximum surface temperature of the heating element
• Fluid flow rate inside the coil passage section
• Electric coil dimensions
• Building materials
• Battery condition during normal expected operating conditions

The electric coils, designed to be inserted in conduits with a square or rectangular section, in tubes or packs for ovens, are in direct contact with the process gas to be heated.

All the Electric Duct Heaters supplied are complete with the various safety systems (thermal sensors such as thermostats, thermocouples or temperature probes) to limit high temperatures, in case of anomalous operation of the system, on the process and on the electric heating beam.      

Together with the frame, the connection hoods between the passage section of the coil and the process section of the customer plant can be supplied. 

The Electric Duct Heaters can be supplied with relative electric command and control panel.

The following certification documentation is supplied with the product:

• Declaration of conformity
• Battery assembly drawing
• Battery wiring diagram
• Use and maintenance manual
• Single-wire wiring diagrams for the switchboard
• Switchboard multi-wire wiring diagrams
• Technical data sheets of the components used and relative declarations of conformity of the suppliers
• Component list
• Reart Internal test Report

Reart is able to provide the following services to support the products supplied:

• Remote assistance to the commissioning & start-up of the plant
• Assistance for spare parts for the preventive maintenance of the systems supplied.
• Spare parts on supplied products.

Special executions are also provided on request and on customer specifications.

For more details refer to the Electric Duct Heaters section or otherwise contact Reart.