The Attsu HHE Hybrid model offers high versatility for industrial steam generation. In mixed operation, it can simultaneously combine the output of common fuels with electric support. The boiler can be sized so that electric steam generation covers from 5% up to 50% of total steam production, depending on the site’s requirements and the available electrical capacity, with low-voltage supply (400/690 V) or medium-voltage supply (4160/6600 V), depending on the configuration.
This share is not fixed; when equipped with an optional PLC and communication protocols such as Modbus or Profibus, the boiler can manage and adjust these shares according to process setpoints or the plant’s energy strategy. For example, in a fire-tube steam boiler with a capacity of 10,000 kg/h, a 50/50 split would mean up to 5,000 kg/h produced by high-temperature electric resistance elements and 5,000 kg/h produced by combustion, depending on electrical availability and operating conditions. In combustion mode, the system is designed for low NOx emissions, contributing to cleaner operation.
This approach helps optimize overall plant performance (with efficiencies of up to 91%, depending on the model), prioritizing at each moment the most suitable energy source in terms of cost or carbon footprint, without compromising continuity of steam supply.
As a manufacturer with extensive experience in fire-tube boiler technology, Attsu designs solutions that match each customer’s energy reality. The ability to integrate hybrid systems into a fire-tube steam boiler manufactured in Europe makes it possible to offer a robust product, digitizable (depending on automation and communications), and aligned with the decarbonization goals of today’s industry.